1 /* 2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "logging/log.hpp" 38 #include "logging/logStream.hpp" 39 #include "memory/heapShared.inline.hpp" 40 #include "memory/metaspaceShared.hpp" 41 #include "memory/oopFactory.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.hpp" 44 #include "oops/fieldStreams.hpp" 45 #include "oops/instanceKlass.hpp" 46 #include "oops/instanceMirrorKlass.hpp" 47 #include "oops/klass.hpp" 48 #include "oops/method.inline.hpp" 49 #include "oops/objArrayOop.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/symbol.hpp" 52 #include "oops/typeArrayOop.inline.hpp" 53 #include "prims/jvmtiExport.hpp" 54 #include "prims/resolvedMethodTable.hpp" 55 #include "runtime/fieldDescriptor.inline.hpp" 56 #include "runtime/frame.inline.hpp" 57 #include "runtime/handles.inline.hpp" 58 #include "runtime/interfaceSupport.inline.hpp" 59 #include "runtime/java.hpp" 60 #include "runtime/javaCalls.hpp" 61 #include "runtime/jniHandles.inline.hpp" 62 #include "runtime/safepoint.hpp" 63 #include "runtime/safepointVerifiers.hpp" 64 #include "runtime/thread.inline.hpp" 65 #include "runtime/vframe.inline.hpp" 66 #include "utilities/align.hpp" 67 #include "utilities/preserveException.hpp" 68 #if INCLUDE_JVMCI 69 #include "jvmci/jvmciJavaClasses.hpp" 70 #endif 71 72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 73 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 74 75 #if INCLUDE_CDS 76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 77 f->do_u4((u4*)&_##name##_offset); 78 #endif 79 80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 81 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 82 83 InjectedField JavaClasses::_injected_fields[] = { 84 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 85 }; 86 87 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 88 return _injected_fields[id].compute_offset(); 89 } 90 91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 92 *field_count = 0; 93 94 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 95 if (sid == vmSymbols::NO_SID) { 96 // Only well known classes can inject fields 97 return NULL; 98 } 99 100 int count = 0; 101 int start = -1; 102 103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 105 count++; \ 106 if (start == -1) start = klass##_##name##_enum; \ 107 } 108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 109 #undef LOOKUP_INJECTED_FIELD 110 111 if (start != -1) { 112 *field_count = count; 113 return _injected_fields + start; 114 } 115 return NULL; 116 } 117 118 119 // Helpful routine for computing field offsets at run time rather than hardcoding them 120 // Finds local fields only, including static fields. Static field offsets are from the 121 // beginning of the mirror. 122 static void compute_offset(int &dest_offset, 123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 124 bool is_static = false) { 125 fieldDescriptor fd; 126 if (ik == NULL) { 127 ResourceMark rm; 128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 129 vm_exit_during_initialization("Invalid layout of well-known class"); 130 } 131 132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 133 ResourceMark rm; 134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 135 name_symbol->as_C_string(), signature_symbol->as_C_string()); 136 #ifndef PRODUCT 137 // Prints all fields and offsets 138 Log(class) lt; 139 LogStream ls(lt.error()); 140 ik->print_on(&ls); 141 #endif //PRODUCT 142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 143 } 144 dest_offset = fd.offset(); 145 } 146 147 // Overloading to pass name as a string. 148 static void compute_offset(int& dest_offset, InstanceKlass* ik, 149 const char* name_string, Symbol* signature_symbol, 150 bool is_static = false) { 151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 152 if (name == NULL) { 153 ResourceMark rm; 154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 156 } 157 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 158 } 159 160 int java_lang_String::value_offset = 0; 161 int java_lang_String::hash_offset = 0; 162 int java_lang_String::coder_offset = 0; 163 164 bool java_lang_String::initialized = false; 165 166 bool java_lang_String::is_instance(oop obj) { 167 return is_instance_inlined(obj); 168 } 169 170 #if INCLUDE_CDS 171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 172 f->do_u4((u4*)&offset) 173 #endif 174 175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 176 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 177 178 #define STRING_FIELDS_DO(macro) \ 179 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 180 macro(hash_offset, k, "hash", int_signature, false); \ 181 macro(coder_offset, k, "coder", byte_signature, false) 182 183 void java_lang_String::compute_offsets() { 184 if (initialized) { 185 return; 186 } 187 188 InstanceKlass* k = SystemDictionary::String_klass(); 189 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 190 191 initialized = true; 192 } 193 194 #if INCLUDE_CDS 195 void java_lang_String::serialize_offsets(SerializeClosure* f) { 196 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 197 f->do_u4((u4*)&initialized); 198 } 199 #endif 200 201 class CompactStringsFixup : public FieldClosure { 202 private: 203 bool _value; 204 205 public: 206 CompactStringsFixup(bool value) : _value(value) {} 207 208 void do_field(fieldDescriptor* fd) { 209 if (fd->name() == vmSymbols::compact_strings_name()) { 210 oop mirror = fd->field_holder()->java_mirror(); 211 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 212 assert(mirror != NULL, "String must have mirror already"); 213 mirror->bool_field_put(fd->offset(), _value); 214 } 215 } 216 }; 217 218 void java_lang_String::set_compact_strings(bool value) { 219 CompactStringsFixup fix(value); 220 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 221 } 222 223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 224 assert(initialized, "Must be initialized"); 225 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 226 227 // Create the String object first, so there's a chance that the String 228 // and the char array it points to end up in the same cache line. 229 oop obj; 230 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 231 232 // Create the char array. The String object must be handlized here 233 // because GC can happen as a result of the allocation attempt. 234 Handle h_obj(THREAD, obj); 235 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 236 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 237 238 // Point the String at the char array 239 obj = h_obj(); 240 set_value(obj, buffer); 241 // No need to zero the offset, allocation zero'ed the entire String object 242 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 243 return h_obj; 244 } 245 246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 247 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 248 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 249 typeArrayOop buffer = value(h_obj()); 250 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 251 if (is_latin1) { 252 for (int index = 0; index < length; index++) { 253 buffer->byte_at_put(index, (jbyte)unicode[index]); 254 } 255 } else { 256 for (int index = 0; index < length; index++) { 257 buffer->char_at_put(index, unicode[index]); 258 } 259 } 260 261 #ifdef ASSERT 262 { 263 ResourceMark rm; 264 char* expected = UNICODE::as_utf8(unicode, length); 265 char* actual = as_utf8_string(h_obj()); 266 if (strcmp(expected, actual) != 0) { 267 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 268 ShouldNotReachHere(); 269 } 270 } 271 #endif 272 273 return h_obj; 274 } 275 276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 277 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 278 return h_obj(); 279 } 280 281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 282 if (utf8_str == NULL) { 283 return Handle(); 284 } 285 bool has_multibyte, is_latin1; 286 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 287 if (!CompactStrings) { 288 has_multibyte = true; 289 is_latin1 = false; 290 } 291 292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 293 if (length > 0) { 294 if (!has_multibyte) { 295 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 296 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 297 } else if (is_latin1) { 298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 299 } else { 300 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 301 } 302 } 303 304 #ifdef ASSERT 305 // This check is too strict because the input string is not necessarily valid UTF8. 306 // For example, it may be created with arbitrary content via jni_NewStringUTF. 307 /* 308 { 309 ResourceMark rm; 310 const char* expected = utf8_str; 311 char* actual = as_utf8_string(h_obj()); 312 if (strcmp(expected, actual) != 0) { 313 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 314 ShouldNotReachHere(); 315 } 316 } 317 */ 318 #endif 319 320 return h_obj; 321 } 322 323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 324 Handle h_obj = create_from_str(utf8_str, CHECK_0); 325 return h_obj(); 326 } 327 328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 329 const char* utf8_str = (char*)symbol->bytes(); 330 int utf8_len = symbol->utf8_length(); 331 332 bool has_multibyte, is_latin1; 333 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 334 if (!CompactStrings) { 335 has_multibyte = true; 336 is_latin1 = false; 337 } 338 339 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 340 if (length > 0) { 341 if (!has_multibyte) { 342 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 343 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 344 } else if (is_latin1) { 345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 346 } else { 347 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 348 } 349 } 350 351 #ifdef ASSERT 352 { 353 ResourceMark rm; 354 const char* expected = symbol->as_utf8(); 355 char* actual = as_utf8_string(h_obj()); 356 if (strncmp(expected, actual, utf8_len) != 0) { 357 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 358 ShouldNotReachHere(); 359 } 360 } 361 #endif 362 363 return h_obj; 364 } 365 366 // Converts a C string to a Java String based on current encoding 367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 368 assert(str != NULL, "bad arguments"); 369 370 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 371 static to_java_string_fn_t _to_java_string_fn = NULL; 372 373 if (_to_java_string_fn == NULL) { 374 void *lib_handle = os::native_java_library(); 375 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 376 if (_to_java_string_fn == NULL) { 377 fatal("NewStringPlatform missing"); 378 } 379 } 380 381 jstring js = NULL; 382 { JavaThread* thread = (JavaThread*)THREAD; 383 assert(thread->is_Java_thread(), "must be java thread"); 384 HandleMark hm(thread); 385 ThreadToNativeFromVM ttn(thread); 386 js = (_to_java_string_fn)(thread->jni_environment(), str); 387 } 388 return Handle(THREAD, JNIHandles::resolve(js)); 389 } 390 391 // Converts a Java String to a native C string that can be used for 392 // native OS calls. 393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 394 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 395 static to_platform_string_fn_t _to_platform_string_fn = NULL; 396 397 if (_to_platform_string_fn == NULL) { 398 void *lib_handle = os::native_java_library(); 399 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 400 if (_to_platform_string_fn == NULL) { 401 fatal("GetStringPlatformChars missing"); 402 } 403 } 404 405 char *native_platform_string; 406 { JavaThread* thread = (JavaThread*)THREAD; 407 assert(thread->is_Java_thread(), "must be java thread"); 408 JNIEnv *env = thread->jni_environment(); 409 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 410 bool is_copy; 411 HandleMark hm(thread); 412 ThreadToNativeFromVM ttn(thread); 413 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 414 assert(is_copy == JNI_TRUE, "is_copy value changed"); 415 JNIHandles::destroy_local(js); 416 } 417 return native_platform_string; 418 } 419 420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 421 oop obj = java_string(); 422 // Typical usage is to convert all '/' to '.' in string. 423 typeArrayOop value = java_lang_String::value(obj); 424 int length = java_lang_String::length(obj, value); 425 bool is_latin1 = java_lang_String::is_latin1(obj); 426 427 // First check if any from_char exist 428 int index; // Declared outside, used later 429 for (index = 0; index < length; index++) { 430 jchar c = !is_latin1 ? value->char_at(index) : 431 ((jchar) value->byte_at(index)) & 0xff; 432 if (c == from_char) { 433 break; 434 } 435 } 436 if (index == length) { 437 // No from_char, so do not copy. 438 return java_string; 439 } 440 441 // Check if result string will be latin1 442 bool to_is_latin1 = false; 443 444 // Replacement char must be latin1 445 if (CompactStrings && UNICODE::is_latin1(to_char)) { 446 if (is_latin1) { 447 // Source string is latin1 as well 448 to_is_latin1 = true; 449 } else if (!UNICODE::is_latin1(from_char)) { 450 // We are replacing an UTF16 char. Scan string to 451 // check if result can be latin1 encoded. 452 to_is_latin1 = true; 453 for (index = 0; index < length; index++) { 454 jchar c = value->char_at(index); 455 if (c != from_char && !UNICODE::is_latin1(c)) { 456 to_is_latin1 = false; 457 break; 458 } 459 } 460 } 461 } 462 463 // Create new UNICODE (or byte) buffer. Must handlize value because GC 464 // may happen during String and char array creation. 465 typeArrayHandle h_value(THREAD, value); 466 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 467 typeArrayOop from_buffer = h_value(); 468 typeArrayOop to_buffer = java_lang_String::value(string()); 469 470 // Copy contents 471 for (index = 0; index < length; index++) { 472 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 473 ((jchar) from_buffer->byte_at(index)) & 0xff; 474 if (c == from_char) { 475 c = to_char; 476 } 477 if (!to_is_latin1) { 478 to_buffer->char_at_put(index, c); 479 } else { 480 to_buffer->byte_at_put(index, (jbyte) c); 481 } 482 } 483 return string; 484 } 485 486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 487 typeArrayOop value = java_lang_String::value(java_string); 488 length = java_lang_String::length(java_string, value); 489 bool is_latin1 = java_lang_String::is_latin1(java_string); 490 491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 492 if (result != NULL) { 493 if (!is_latin1) { 494 for (int index = 0; index < length; index++) { 495 result[index] = value->char_at(index); 496 } 497 } else { 498 for (int index = 0; index < length; index++) { 499 result[index] = ((jchar) value->byte_at(index)) & 0xff; 500 } 501 } 502 } else { 503 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 504 } 505 return result; 506 } 507 508 unsigned int java_lang_String::hash_code(oop java_string) { 509 typeArrayOop value = java_lang_String::value(java_string); 510 int length = java_lang_String::length(java_string, value); 511 // Zero length string will hash to zero with String.hashCode() function. 512 if (length == 0) return 0; 513 514 bool is_latin1 = java_lang_String::is_latin1(java_string); 515 516 if (is_latin1) { 517 return java_lang_String::hash_code(value->byte_at_addr(0), length); 518 } else { 519 return java_lang_String::hash_code(value->char_at_addr(0), length); 520 } 521 } 522 523 char* java_lang_String::as_quoted_ascii(oop java_string) { 524 typeArrayOop value = java_lang_String::value(java_string); 525 int length = java_lang_String::length(java_string, value); 526 bool is_latin1 = java_lang_String::is_latin1(java_string); 527 528 if (length == 0) return NULL; 529 530 char* result; 531 int result_length; 532 if (!is_latin1) { 533 jchar* base = value->char_at_addr(0); 534 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 535 result = NEW_RESOURCE_ARRAY(char, result_length); 536 UNICODE::as_quoted_ascii(base, length, result, result_length); 537 } else { 538 jbyte* base = value->byte_at_addr(0); 539 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 540 result = NEW_RESOURCE_ARRAY(char, result_length); 541 UNICODE::as_quoted_ascii(base, length, result, result_length); 542 } 543 assert(result_length >= length + 1, "must not be shorter"); 544 assert(result_length == (int)strlen(result) + 1, "must match"); 545 return result; 546 } 547 548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string, value); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 if (!is_latin1) { 553 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 554 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 555 return sym; 556 } else { 557 ResourceMark rm; 558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 559 const char* base = UNICODE::as_utf8(position, length); 560 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 561 return sym; 562 } 563 } 564 565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 566 typeArrayOop value = java_lang_String::value(java_string); 567 int length = java_lang_String::length(java_string, value); 568 bool is_latin1 = java_lang_String::is_latin1(java_string); 569 if (!is_latin1) { 570 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 571 return SymbolTable::probe_unicode(base, length); 572 } else { 573 ResourceMark rm; 574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 575 const char* base = UNICODE::as_utf8(position, length); 576 return SymbolTable::probe(base, length); 577 } 578 } 579 580 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 581 assert(values_equal(value, java_lang_String::value(java_string)), 582 "value must be same as java_lang_String::value(java_string)"); 583 int length = java_lang_String::length(java_string, value); 584 if (length == 0) { 585 return 0; 586 } 587 if (!java_lang_String::is_latin1(java_string)) { 588 return UNICODE::utf8_length(value->char_at_addr(0), length); 589 } else { 590 return UNICODE::utf8_length(value->byte_at_addr(0), length); 591 } 592 } 593 594 int java_lang_String::utf8_length(oop java_string) { 595 typeArrayOop value = java_lang_String::value(java_string); 596 return utf8_length(java_string, value); 597 } 598 599 char* java_lang_String::as_utf8_string(oop java_string) { 600 typeArrayOop value = java_lang_String::value(java_string); 601 int length = java_lang_String::length(java_string, value); 602 bool is_latin1 = java_lang_String::is_latin1(java_string); 603 if (!is_latin1) { 604 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 605 return UNICODE::as_utf8(position, length); 606 } else { 607 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 608 return UNICODE::as_utf8(position, length); 609 } 610 } 611 612 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 613 assert(values_equal(value, java_lang_String::value(java_string)), 614 "value must be same as java_lang_String::value(java_string)"); 615 int length = java_lang_String::length(java_string, value); 616 bool is_latin1 = java_lang_String::is_latin1(java_string); 617 if (!is_latin1) { 618 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 619 return UNICODE::as_utf8(position, length, buf, buflen); 620 } else { 621 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 622 return UNICODE::as_utf8(position, length, buf, buflen); 623 } 624 } 625 626 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 627 typeArrayOop value = java_lang_String::value(java_string); 628 return as_utf8_string(java_string, value, buf, buflen); 629 } 630 631 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 632 typeArrayOop value = java_lang_String::value(java_string); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 assert(start + len <= java_lang_String::length(java_string), "just checking"); 635 if (!is_latin1) { 636 jchar* position = value->char_at_addr(start); 637 return UNICODE::as_utf8(position, len); 638 } else { 639 jbyte* position = value->byte_at_addr(start); 640 return UNICODE::as_utf8(position, len); 641 } 642 } 643 644 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 645 assert(values_equal(value, java_lang_String::value(java_string)), 646 "value must be same as java_lang_String::value(java_string)"); 647 assert(start + len <= java_lang_String::length(java_string), "just checking"); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar* position = value->char_at_addr(start); 651 return UNICODE::as_utf8(position, len, buf, buflen); 652 } else { 653 jbyte* position = value->byte_at_addr(start); 654 return UNICODE::as_utf8(position, len, buf, buflen); 655 } 656 } 657 658 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 659 assert(java_string->klass() == SystemDictionary::String_klass(), 660 "must be java_string"); 661 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 662 int length = java_lang_String::length(java_string, value); 663 if (length != len) { 664 return false; 665 } 666 bool is_latin1 = java_lang_String::is_latin1(java_string); 667 if (!is_latin1) { 668 for (int i = 0; i < len; i++) { 669 if (value->char_at(i) != chars[i]) { 670 return false; 671 } 672 } 673 } else { 674 for (int i = 0; i < len; i++) { 675 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 676 return false; 677 } 678 } 679 } 680 return true; 681 } 682 683 bool java_lang_String::equals(oop str1, oop str2) { 684 assert(str1->klass() == SystemDictionary::String_klass(), 685 "must be java String"); 686 assert(str2->klass() == SystemDictionary::String_klass(), 687 "must be java String"); 688 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 689 bool is_latin1 = java_lang_String::is_latin1(str1); 690 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 691 bool is_latin2 = java_lang_String::is_latin1(str2); 692 693 if (is_latin1 != is_latin2) { 694 // Strings with different coders are never equal. 695 return false; 696 } 697 return values_equal(value1, value2); 698 } 699 700 void java_lang_String::print(oop java_string, outputStream* st) { 701 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 702 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 703 704 if (value == NULL) { 705 // This can happen if, e.g., printing a String 706 // object before its initializer has been called 707 st->print("NULL"); 708 return; 709 } 710 711 int length = java_lang_String::length(java_string, value); 712 bool is_latin1 = java_lang_String::is_latin1(java_string); 713 714 st->print("\""); 715 for (int index = 0; index < length; index++) { 716 st->print("%c", (!is_latin1) ? value->char_at(index) : 717 ((jchar) value->byte_at(index)) & 0xff ); 718 } 719 st->print("\""); 720 } 721 722 723 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 724 assert(mirror.not_null() && fd->is_static(), "just checking"); 725 if (fd->has_initial_value()) { 726 BasicType t = fd->field_type(); 727 switch (t) { 728 case T_BYTE: 729 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 730 break; 731 case T_BOOLEAN: 732 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 733 break; 734 case T_CHAR: 735 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 736 break; 737 case T_SHORT: 738 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 739 break; 740 case T_INT: 741 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 742 break; 743 case T_FLOAT: 744 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 745 break; 746 case T_DOUBLE: 747 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 748 break; 749 case T_LONG: 750 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 751 break; 752 case T_OBJECT: 753 { 754 assert(fd->signature() == vmSymbols::string_signature(), 755 "just checking"); 756 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 757 // Archive the String field and update the pointer. 758 oop s = mirror()->obj_field(fd->offset()); 759 oop archived_s = StringTable::create_archived_string(s, CHECK); 760 mirror()->obj_field_put(fd->offset(), archived_s); 761 } else { 762 oop string = fd->string_initial_value(CHECK); 763 mirror()->obj_field_put(fd->offset(), string); 764 } 765 } 766 break; 767 default: 768 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 769 "Illegal ConstantValue attribute in class file"); 770 } 771 } 772 } 773 774 775 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 776 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 777 778 // If the offset was read from the shared archive, it was fixed up already 779 if (!k->is_shared()) { 780 if (k->is_instance_klass()) { 781 // During bootstrap, java.lang.Class wasn't loaded so static field 782 // offsets were computed without the size added it. Go back and 783 // update all the static field offsets to included the size. 784 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 785 if (fs.access_flags().is_static()) { 786 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 787 fs.set_offset(real_offset); 788 } 789 } 790 } 791 } 792 793 if (k->is_shared() && k->has_raw_archived_mirror()) { 794 if (HeapShared::open_archive_heap_region_mapped()) { 795 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 796 assert(present, "Missing archived mirror for %s", k->external_name()); 797 return; 798 } else { 799 k->set_java_mirror_handle(NULL); 800 k->clear_has_raw_archived_mirror(); 801 } 802 } 803 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 804 } 805 806 void java_lang_Class::initialize_mirror_fields(Klass* k, 807 Handle mirror, 808 Handle protection_domain, 809 TRAPS) { 810 // Allocate a simple java object for a lock. 811 // This needs to be a java object because during class initialization 812 // it can be held across a java call. 813 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 814 set_init_lock(mirror(), r); 815 816 // Set protection domain also 817 set_protection_domain(mirror(), protection_domain()); 818 819 // Initialize static fields 820 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 821 } 822 823 // Set the java.lang.Module module field in the java_lang_Class mirror 824 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 825 if (module.is_null()) { 826 // During startup, the module may be NULL only if java.base has not been defined yet. 827 // Put the class on the fixup_module_list to patch later when the java.lang.Module 828 // for java.base is known. But note that since we captured the NULL module another 829 // thread may have completed that initialization. 830 831 bool javabase_was_defined = false; 832 { 833 MutexLocker m1(Module_lock, THREAD); 834 // Keep list of classes needing java.base module fixup 835 if (!ModuleEntryTable::javabase_defined()) { 836 assert(k->java_mirror() != NULL, "Class's mirror is null"); 837 k->class_loader_data()->inc_keep_alive(); 838 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 839 fixup_module_field_list()->push(k); 840 } else { 841 javabase_was_defined = true; 842 } 843 } 844 845 // If java.base was already defined then patch this particular class with java.base. 846 if (javabase_was_defined) { 847 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 848 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 849 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 850 Handle javabase_handle(THREAD, javabase_entry->module()); 851 set_module(mirror(), javabase_handle()); 852 } 853 } else { 854 assert(Universe::is_module_initialized() || 855 (ModuleEntryTable::javabase_defined() && 856 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 857 "Incorrect java.lang.Module specification while creating mirror"); 858 set_module(mirror(), module()); 859 } 860 } 861 862 // Statically allocate fixup lists because they always get created. 863 void java_lang_Class::allocate_fixup_lists() { 864 GrowableArray<Klass*>* mirror_list = 865 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 866 set_fixup_mirror_list(mirror_list); 867 868 GrowableArray<Klass*>* module_list = 869 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 870 set_fixup_module_field_list(module_list); 871 } 872 873 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 874 Handle module, Handle protection_domain, TRAPS) { 875 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 876 assert(k->java_mirror() == NULL, "should only assign mirror once"); 877 878 // Use this moment of initialization to cache modifier_flags also, 879 // to support Class.getModifiers(). Instance classes recalculate 880 // the cached flags after the class file is parsed, but before the 881 // class is put into the system dictionary. 882 int computed_modifiers = k->compute_modifier_flags(CHECK); 883 k->set_modifier_flags(computed_modifiers); 884 // Class_klass has to be loaded because it is used to allocate 885 // the mirror. 886 if (SystemDictionary::Class_klass_loaded()) { 887 // Allocate mirror (java.lang.Class instance) 888 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 889 Handle mirror(THREAD, mirror_oop); 890 Handle comp_mirror; 891 892 // Setup indirection from mirror->klass 893 java_lang_Class::set_klass(mirror(), k); 894 895 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 896 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 897 898 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 899 900 // It might also have a component mirror. This mirror must already exist. 901 if (k->is_array_klass()) { 902 if (k->is_typeArray_klass()) { 903 BasicType type = TypeArrayKlass::cast(k)->element_type(); 904 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 905 } else { 906 assert(k->is_objArray_klass(), "Must be"); 907 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 908 assert(element_klass != NULL, "Must have an element klass"); 909 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 910 } 911 assert(comp_mirror() != NULL, "must have a mirror"); 912 913 // Two-way link between the array klass and its component mirror: 914 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 915 set_component_mirror(mirror(), comp_mirror()); 916 // See below for ordering dependencies between field array_klass in component mirror 917 // and java_mirror in this klass. 918 } else { 919 assert(k->is_instance_klass(), "Must be"); 920 921 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 922 if (HAS_PENDING_EXCEPTION) { 923 // If any of the fields throws an exception like OOM remove the klass field 924 // from the mirror so GC doesn't follow it after the klass has been deallocated. 925 // This mirror looks like a primitive type, which logically it is because it 926 // it represents no class. 927 java_lang_Class::set_klass(mirror(), NULL); 928 return; 929 } 930 } 931 932 // set the classLoader field in the java_lang_Class instance 933 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 934 set_class_loader(mirror(), class_loader()); 935 936 // Setup indirection from klass->mirror 937 // after any exceptions can happen during allocations. 938 k->set_java_mirror(mirror); 939 940 // Set the module field in the java_lang_Class instance. This must be done 941 // after the mirror is set. 942 set_mirror_module_field(k, mirror, module, THREAD); 943 944 if (comp_mirror() != NULL) { 945 // Set after k->java_mirror() is published, because compiled code running 946 // concurrently doesn't expect a k to have a null java_mirror. 947 release_set_array_klass(comp_mirror(), k); 948 } 949 } else { 950 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 951 fixup_mirror_list()->push(k); 952 } 953 } 954 955 #if INCLUDE_CDS_JAVA_HEAP 956 // Clears mirror fields. Static final fields with initial values are reloaded 957 // from constant pool. The object identity hash is in the object header and is 958 // not affected. 959 class ResetMirrorField: public FieldClosure { 960 private: 961 Handle _m; 962 963 public: 964 ResetMirrorField(Handle mirror) : _m(mirror) {} 965 966 void do_field(fieldDescriptor* fd) { 967 assert(DumpSharedSpaces, "dump time only"); 968 assert(_m.not_null(), "Mirror cannot be NULL"); 969 970 if (fd->is_static() && fd->has_initial_value()) { 971 initialize_static_field(fd, _m, Thread::current()); 972 return; 973 } 974 975 BasicType ft = fd->field_type(); 976 switch (ft) { 977 case T_BYTE: 978 _m()->byte_field_put(fd->offset(), 0); 979 break; 980 case T_CHAR: 981 _m()->char_field_put(fd->offset(), 0); 982 break; 983 case T_DOUBLE: 984 _m()->double_field_put(fd->offset(), 0); 985 break; 986 case T_FLOAT: 987 _m()->float_field_put(fd->offset(), 0); 988 break; 989 case T_INT: 990 _m()->int_field_put(fd->offset(), 0); 991 break; 992 case T_LONG: 993 _m()->long_field_put(fd->offset(), 0); 994 break; 995 case T_SHORT: 996 _m()->short_field_put(fd->offset(), 0); 997 break; 998 case T_BOOLEAN: 999 _m()->bool_field_put(fd->offset(), false); 1000 break; 1001 case T_ARRAY: 1002 case T_OBJECT: { 1003 // It might be useful to cache the String field, but 1004 // for now just clear out any reference field 1005 oop o = _m()->obj_field(fd->offset()); 1006 _m()->obj_field_put(fd->offset(), NULL); 1007 break; 1008 } 1009 default: 1010 ShouldNotReachHere(); 1011 break; 1012 } 1013 } 1014 }; 1015 1016 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1017 assert(HeapShared::is_heap_object_archiving_allowed(), 1018 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1019 1020 for (int t = 0; t <= T_VOID; t++) { 1021 oop m = Universe::_mirrors[t]; 1022 if (m != NULL) { 1023 // Update the field at _array_klass_offset to point to the relocated array klass. 1024 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1025 assert(archived_m != NULL, "sanity"); 1026 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1027 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1028 if (ak != NULL) { 1029 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1030 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1031 } 1032 1033 // Clear the fields. Just to be safe 1034 Klass *k = m->klass(); 1035 Handle archived_mirror_h(THREAD, archived_m); 1036 ResetMirrorField reset(archived_mirror_h); 1037 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1038 1039 log_trace(cds, heap, mirror)( 1040 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1041 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1042 1043 Universe::_mirrors[t] = archived_m; 1044 } 1045 } 1046 1047 assert(Universe::_mirrors[T_INT] != NULL && 1048 Universe::_mirrors[T_FLOAT] != NULL && 1049 Universe::_mirrors[T_DOUBLE] != NULL && 1050 Universe::_mirrors[T_BYTE] != NULL && 1051 Universe::_mirrors[T_BOOLEAN] != NULL && 1052 Universe::_mirrors[T_CHAR] != NULL && 1053 Universe::_mirrors[T_LONG] != NULL && 1054 Universe::_mirrors[T_SHORT] != NULL && 1055 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1056 1057 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1058 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1059 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1060 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1061 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1062 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1063 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1064 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1065 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1066 } 1067 1068 // 1069 // After the mirror object is successfully archived, the archived 1070 // klass is set with _has_archived_raw_mirror flag. 1071 // 1072 // The _has_archived_raw_mirror flag is cleared at runtime when the 1073 // archived mirror is restored. If archived java heap data cannot 1074 // be used at runtime, new mirror object is created for the shared 1075 // class. The _has_archived_raw_mirror is cleared also during the process. 1076 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1077 assert(HeapShared::is_heap_object_archiving_allowed(), 1078 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1079 1080 // Mirror is already archived 1081 if (k->has_raw_archived_mirror()) { 1082 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1083 return k->archived_java_mirror_raw(); 1084 } 1085 1086 // No mirror 1087 oop mirror = k->java_mirror(); 1088 if (mirror == NULL) { 1089 return NULL; 1090 } 1091 1092 if (k->is_instance_klass()) { 1093 InstanceKlass *ik = InstanceKlass::cast(k); 1094 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1095 1096 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1097 ik->is_shared_app_class())) { 1098 // Archiving mirror for classes from non-builtin loaders is not 1099 // supported. Clear the _java_mirror within the archived class. 1100 k->set_java_mirror_handle(NULL); 1101 return NULL; 1102 } 1103 } 1104 1105 // Now start archiving the mirror object 1106 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1107 if (archived_mirror == NULL) { 1108 return NULL; 1109 } 1110 1111 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1112 if (archived_mirror == NULL) { 1113 return NULL; 1114 } 1115 1116 k->set_archived_java_mirror_raw(archived_mirror); 1117 1118 k->set_has_raw_archived_mirror(); 1119 1120 ResourceMark rm; 1121 log_trace(cds, heap, mirror)( 1122 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1123 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1124 1125 return archived_mirror; 1126 } 1127 1128 // The process is based on create_mirror(). 1129 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1130 oop archived_mirror, 1131 Thread *THREAD) { 1132 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1133 // to archived metadata and objects below. 1134 Klass *c = archived_mirror->klass(); 1135 Handle archived_mirror_h(THREAD, archived_mirror); 1136 ResetMirrorField reset(archived_mirror_h); 1137 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1138 1139 if (k->is_array_klass()) { 1140 oop archived_comp_mirror; 1141 if (k->is_typeArray_klass()) { 1142 // The primitive type mirrors are already archived. Get the archived mirror. 1143 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1144 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1145 assert(archived_comp_mirror != NULL, "Must be"); 1146 } else { 1147 assert(k->is_objArray_klass(), "Must be"); 1148 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1149 assert(element_klass != NULL, "Must have an element klass"); 1150 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1151 if (archived_comp_mirror == NULL) { 1152 return NULL; 1153 } 1154 } 1155 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1156 } else { 1157 assert(k->is_instance_klass(), "Must be"); 1158 1159 // Reset local static fields in the mirror 1160 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1161 1162 java_lang_Class:set_init_lock(archived_mirror, NULL); 1163 1164 set_protection_domain(archived_mirror, NULL); 1165 } 1166 1167 // clear class loader and mirror_module_field 1168 set_class_loader(archived_mirror, NULL); 1169 set_module(archived_mirror, NULL); 1170 1171 // The archived mirror's field at _klass_offset is still pointing to the original 1172 // klass. Updated the field in the archived mirror to point to the relocated 1173 // klass in the archive. 1174 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1175 log_debug(cds, heap, mirror)( 1176 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1177 p2i(as_Klass(mirror)), p2i(reloc_k)); 1178 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1179 1180 // The field at _array_klass_offset is pointing to the original one dimension 1181 // higher array klass if exists. Relocate the pointer. 1182 Klass *arr = array_klass_acquire(mirror); 1183 if (arr != NULL) { 1184 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1185 log_debug(cds, heap, mirror)( 1186 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1187 p2i(arr), p2i(reloc_arr)); 1188 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1189 } 1190 return archived_mirror; 1191 } 1192 1193 // Returns true if the mirror is updated, false if no archived mirror 1194 // data is present. After the archived mirror object is restored, the 1195 // shared klass' _has_raw_archived_mirror flag is cleared. 1196 bool java_lang_Class::restore_archived_mirror(Klass *k, 1197 Handle class_loader, Handle module, 1198 Handle protection_domain, TRAPS) { 1199 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1200 // see more details in SystemDictionary::resolve_well_known_classes(). 1201 if (!SystemDictionary::Class_klass_loaded()) { 1202 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1203 fixup_mirror_list()->push(k); 1204 return true; 1205 } 1206 1207 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1208 1209 if (m == NULL) { 1210 return false; 1211 } 1212 1213 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1214 1215 // mirror is archived, restore 1216 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1217 Handle mirror(THREAD, m); 1218 1219 if (!k->is_array_klass()) { 1220 // - local static final fields with initial values were initialized at dump time 1221 1222 // create the init_lock 1223 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1224 set_init_lock(mirror(), r); 1225 1226 if (protection_domain.not_null()) { 1227 set_protection_domain(mirror(), protection_domain()); 1228 } 1229 } 1230 1231 assert(class_loader() == k->class_loader(), "should be same"); 1232 if (class_loader.not_null()) { 1233 set_class_loader(mirror(), class_loader()); 1234 } 1235 1236 k->set_java_mirror(mirror); 1237 k->clear_has_raw_archived_mirror(); 1238 1239 set_mirror_module_field(k, mirror, module, THREAD); 1240 1241 ResourceMark rm; 1242 log_trace(cds, heap, mirror)( 1243 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1244 1245 return true; 1246 } 1247 #endif // INCLUDE_CDS_JAVA_HEAP 1248 1249 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1250 assert(_module_offset != 0, "must have been computed already"); 1251 java_lang_Class::set_module(k->java_mirror(), module()); 1252 } 1253 1254 int java_lang_Class::oop_size(oop java_class) { 1255 assert(_oop_size_offset != 0, "must be set"); 1256 int size = java_class->int_field(_oop_size_offset); 1257 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1258 return size; 1259 } 1260 1261 1262 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1263 assert(_oop_size_offset != 0, "must be set"); 1264 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1265 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1266 } 1267 1268 int java_lang_Class::static_oop_field_count(oop java_class) { 1269 assert(_static_oop_field_count_offset != 0, "must be set"); 1270 return java_class->int_field(_static_oop_field_count_offset); 1271 } 1272 1273 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1274 assert(_static_oop_field_count_offset != 0, "must be set"); 1275 return java_class->int_field_raw(_static_oop_field_count_offset); 1276 } 1277 1278 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1279 assert(_static_oop_field_count_offset != 0, "must be set"); 1280 java_class->int_field_put(_static_oop_field_count_offset, size); 1281 } 1282 1283 oop java_lang_Class::protection_domain(oop java_class) { 1284 assert(_protection_domain_offset != 0, "must be set"); 1285 return java_class->obj_field(_protection_domain_offset); 1286 } 1287 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1288 assert(_protection_domain_offset != 0, "must be set"); 1289 java_class->obj_field_put(_protection_domain_offset, pd); 1290 } 1291 1292 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1293 assert(_component_mirror_offset != 0, "must be set"); 1294 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1295 } 1296 oop java_lang_Class::component_mirror(oop java_class) { 1297 assert(_component_mirror_offset != 0, "must be set"); 1298 return java_class->obj_field(_component_mirror_offset); 1299 } 1300 1301 oop java_lang_Class::init_lock(oop java_class) { 1302 assert(_init_lock_offset != 0, "must be set"); 1303 return java_class->obj_field(_init_lock_offset); 1304 } 1305 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1306 assert(_init_lock_offset != 0, "must be set"); 1307 java_class->obj_field_put(_init_lock_offset, init_lock); 1308 } 1309 1310 objArrayOop java_lang_Class::signers(oop java_class) { 1311 assert(_signers_offset != 0, "must be set"); 1312 return (objArrayOop)java_class->obj_field(_signers_offset); 1313 } 1314 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1315 assert(_signers_offset != 0, "must be set"); 1316 java_class->obj_field_put(_signers_offset, (oop)signers); 1317 } 1318 1319 1320 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1321 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1322 if (_class_loader_offset != 0) { 1323 java_class->obj_field_put(_class_loader_offset, loader); 1324 } 1325 } 1326 1327 oop java_lang_Class::class_loader(oop java_class) { 1328 assert(_class_loader_offset != 0, "must be set"); 1329 return java_class->obj_field(_class_loader_offset); 1330 } 1331 1332 oop java_lang_Class::module(oop java_class) { 1333 assert(_module_offset != 0, "must be set"); 1334 return java_class->obj_field(_module_offset); 1335 } 1336 1337 void java_lang_Class::set_module(oop java_class, oop module) { 1338 assert(_module_offset != 0, "must be set"); 1339 java_class->obj_field_put(_module_offset, module); 1340 } 1341 1342 oop java_lang_Class::name(Handle java_class, TRAPS) { 1343 assert(_name_offset != 0, "must be set"); 1344 oop o = java_class->obj_field(_name_offset); 1345 if (o == NULL) { 1346 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1347 java_class->obj_field_put(_name_offset, o); 1348 } 1349 return o; 1350 } 1351 1352 oop java_lang_Class::source_file(oop java_class) { 1353 assert(_source_file_offset != 0, "must be set"); 1354 return java_class->obj_field(_source_file_offset); 1355 } 1356 1357 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1358 assert(_source_file_offset != 0, "must be set"); 1359 java_class->obj_field_put(_source_file_offset, source_file); 1360 } 1361 1362 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1363 // This should be improved by adding a field at the Java level or by 1364 // introducing a new VM klass (see comment in ClassFileParser) 1365 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1366 if (type != T_VOID) { 1367 Klass* aklass = Universe::typeArrayKlassObj(type); 1368 assert(aklass != NULL, "correct bootstrap"); 1369 release_set_array_klass(java_class, aklass); 1370 } 1371 #ifdef ASSERT 1372 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1373 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1374 #endif 1375 return java_class; 1376 } 1377 1378 1379 Klass* java_lang_Class::as_Klass(oop java_class) { 1380 //%note memory_2 1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1382 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1383 assert(k == NULL || k->is_klass(), "type check"); 1384 return k; 1385 } 1386 1387 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1388 //%note memory_2 1389 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1390 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1391 assert(k == NULL || k->is_klass(), "type check"); 1392 return k; 1393 } 1394 1395 1396 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1397 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1398 java_class->metadata_field_put(_klass_offset, klass); 1399 } 1400 1401 1402 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1403 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1404 Symbol* name = NULL; 1405 bool is_instance = false; 1406 if (is_primitive(java_class)) { 1407 name = vmSymbols::type_signature(primitive_type(java_class)); 1408 } else { 1409 Klass* k = as_Klass(java_class); 1410 is_instance = k->is_instance_klass(); 1411 name = k->name(); 1412 } 1413 if (name == NULL) { 1414 st->print("<null>"); 1415 return; 1416 } 1417 if (is_instance) st->print("L"); 1418 st->write((char*) name->base(), (int) name->utf8_length()); 1419 if (is_instance) st->print(";"); 1420 } 1421 1422 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1423 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1424 Symbol* name; 1425 if (is_primitive(java_class)) { 1426 name = vmSymbols::type_signature(primitive_type(java_class)); 1427 // Because this can create a new symbol, the caller has to decrement 1428 // the refcount, so make adjustment here and below for symbols returned 1429 // that are not created or incremented due to a successful lookup. 1430 name->increment_refcount(); 1431 } else { 1432 Klass* k = as_Klass(java_class); 1433 if (!k->is_instance_klass()) { 1434 name = k->name(); 1435 name->increment_refcount(); 1436 } else { 1437 ResourceMark rm; 1438 const char* sigstr = k->signature_name(); 1439 int siglen = (int) strlen(sigstr); 1440 if (!intern_if_not_found) { 1441 name = SymbolTable::probe(sigstr, siglen); 1442 } else { 1443 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1444 } 1445 } 1446 } 1447 return name; 1448 } 1449 1450 // Returns the Java name for this Java mirror (Resource allocated) 1451 // See Klass::external_name(). 1452 // For primitive type Java mirrors, its type name is returned. 1453 const char* java_lang_Class::as_external_name(oop java_class) { 1454 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1455 const char* name = NULL; 1456 if (is_primitive(java_class)) { 1457 name = type2name(primitive_type(java_class)); 1458 } else { 1459 name = as_Klass(java_class)->external_name(); 1460 } 1461 if (name == NULL) { 1462 name = "<null>"; 1463 } 1464 return name; 1465 } 1466 1467 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1468 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1469 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1470 return k; 1471 } 1472 1473 1474 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1475 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1476 java_class->release_metadata_field_put(_array_klass_offset, klass); 1477 } 1478 1479 1480 BasicType java_lang_Class::primitive_type(oop java_class) { 1481 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1482 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1483 BasicType type = T_VOID; 1484 if (ak != NULL) { 1485 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1486 type = ArrayKlass::cast(ak)->element_type(); 1487 } else { 1488 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1489 } 1490 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1491 return type; 1492 } 1493 1494 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1495 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1496 if (is_primitive(java_class)) { 1497 if (reference_klass != NULL) 1498 (*reference_klass) = NULL; 1499 return primitive_type(java_class); 1500 } else { 1501 if (reference_klass != NULL) 1502 (*reference_klass) = as_Klass(java_class); 1503 return T_OBJECT; 1504 } 1505 } 1506 1507 1508 oop java_lang_Class::primitive_mirror(BasicType t) { 1509 oop mirror = Universe::java_mirror(t); 1510 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1511 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1512 return mirror; 1513 } 1514 1515 bool java_lang_Class::offsets_computed = false; 1516 int java_lang_Class::classRedefinedCount_offset = -1; 1517 1518 #define CLASS_FIELDS_DO(macro) \ 1519 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1520 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1521 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1522 macro(_module_offset, k, "module", module_signature, false); \ 1523 macro(_name_offset, k, "name", string_signature, false); \ 1524 1525 void java_lang_Class::compute_offsets() { 1526 if (offsets_computed) { 1527 return; 1528 } 1529 1530 offsets_computed = true; 1531 1532 InstanceKlass* k = SystemDictionary::Class_klass(); 1533 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1534 1535 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1536 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1537 // GC treats them the same. 1538 _init_lock_offset = _component_mirror_offset; 1539 1540 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1541 } 1542 1543 #if INCLUDE_CDS 1544 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1545 f->do_u4((u4*)&offsets_computed); 1546 f->do_u4((u4*)&_init_lock_offset); 1547 1548 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1549 1550 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1551 } 1552 #endif 1553 1554 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1555 if (classRedefinedCount_offset == -1) { 1556 // If we don't have an offset for it then just return -1 as a marker. 1557 return -1; 1558 } 1559 1560 return the_class_mirror->int_field(classRedefinedCount_offset); 1561 } 1562 1563 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1564 if (classRedefinedCount_offset == -1) { 1565 // If we don't have an offset for it then nothing to set. 1566 return; 1567 } 1568 1569 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1570 } 1571 1572 1573 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1574 // platform thread structure, and a eetop offset which was used for thread 1575 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1576 // merged, so in the HotSpot VM we just use the eetop field for the thread 1577 // instead of the privateInfo_offset. 1578 // 1579 // Note: The stackSize field is only present starting in 1.4. 1580 1581 int java_lang_Thread::_name_offset = 0; 1582 int java_lang_Thread::_group_offset = 0; 1583 int java_lang_Thread::_contextClassLoader_offset = 0; 1584 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1585 int java_lang_Thread::_priority_offset = 0; 1586 int java_lang_Thread::_eetop_offset = 0; 1587 int java_lang_Thread::_daemon_offset = 0; 1588 int java_lang_Thread::_stillborn_offset = 0; 1589 int java_lang_Thread::_stackSize_offset = 0; 1590 int java_lang_Thread::_tid_offset = 0; 1591 int java_lang_Thread::_thread_status_offset = 0; 1592 int java_lang_Thread::_park_blocker_offset = 0; 1593 int java_lang_Thread::_park_event_offset = 0 ; 1594 1595 #define THREAD_FIELDS_DO(macro) \ 1596 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1597 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1598 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1599 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1600 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1601 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1602 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1603 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1604 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1605 macro(_tid_offset, k, "tid", long_signature, false); \ 1606 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1607 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1608 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1609 1610 void java_lang_Thread::compute_offsets() { 1611 assert(_group_offset == 0, "offsets should be initialized only once"); 1612 1613 InstanceKlass* k = SystemDictionary::Thread_klass(); 1614 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1615 } 1616 1617 #if INCLUDE_CDS 1618 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1619 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1620 } 1621 #endif 1622 1623 JavaThread* java_lang_Thread::thread(oop java_thread) { 1624 return (JavaThread*)java_thread->address_field(_eetop_offset); 1625 } 1626 1627 1628 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1629 java_thread->address_field_put(_eetop_offset, (address)thread); 1630 } 1631 1632 1633 oop java_lang_Thread::name(oop java_thread) { 1634 return java_thread->obj_field(_name_offset); 1635 } 1636 1637 1638 void java_lang_Thread::set_name(oop java_thread, oop name) { 1639 java_thread->obj_field_put(_name_offset, name); 1640 } 1641 1642 1643 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1644 return (ThreadPriority)java_thread->int_field(_priority_offset); 1645 } 1646 1647 1648 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1649 java_thread->int_field_put(_priority_offset, priority); 1650 } 1651 1652 1653 oop java_lang_Thread::threadGroup(oop java_thread) { 1654 return java_thread->obj_field(_group_offset); 1655 } 1656 1657 1658 bool java_lang_Thread::is_stillborn(oop java_thread) { 1659 return java_thread->bool_field(_stillborn_offset) != 0; 1660 } 1661 1662 1663 // We never have reason to turn the stillborn bit off 1664 void java_lang_Thread::set_stillborn(oop java_thread) { 1665 java_thread->bool_field_put(_stillborn_offset, true); 1666 } 1667 1668 1669 bool java_lang_Thread::is_alive(oop java_thread) { 1670 JavaThread* thr = java_lang_Thread::thread(java_thread); 1671 return (thr != NULL); 1672 } 1673 1674 1675 bool java_lang_Thread::is_daemon(oop java_thread) { 1676 return java_thread->bool_field(_daemon_offset) != 0; 1677 } 1678 1679 1680 void java_lang_Thread::set_daemon(oop java_thread) { 1681 java_thread->bool_field_put(_daemon_offset, true); 1682 } 1683 1684 oop java_lang_Thread::context_class_loader(oop java_thread) { 1685 return java_thread->obj_field(_contextClassLoader_offset); 1686 } 1687 1688 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1689 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1690 } 1691 1692 1693 jlong java_lang_Thread::stackSize(oop java_thread) { 1694 if (_stackSize_offset > 0) { 1695 return java_thread->long_field(_stackSize_offset); 1696 } else { 1697 return 0; 1698 } 1699 } 1700 1701 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1702 void java_lang_Thread::set_thread_status(oop java_thread, 1703 java_lang_Thread::ThreadStatus status) { 1704 // The threadStatus is only present starting in 1.5 1705 if (_thread_status_offset > 0) { 1706 java_thread->int_field_put(_thread_status_offset, status); 1707 } 1708 } 1709 1710 // Read thread status value from threadStatus field in java.lang.Thread java class. 1711 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1712 // Make sure the caller is operating on behalf of the VM or is 1713 // running VM code (state == _thread_in_vm). 1714 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1715 JavaThread::current()->thread_state() == _thread_in_vm, 1716 "Java Thread is not running in vm"); 1717 // The threadStatus is only present starting in 1.5 1718 if (_thread_status_offset > 0) { 1719 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1720 } else { 1721 // All we can easily figure out is if it is alive, but that is 1722 // enough info for a valid unknown status. 1723 // These aren't restricted to valid set ThreadStatus values, so 1724 // use JVMTI values and cast. 1725 JavaThread* thr = java_lang_Thread::thread(java_thread); 1726 if (thr == NULL) { 1727 // the thread hasn't run yet or is in the process of exiting 1728 return NEW; 1729 } 1730 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1731 } 1732 } 1733 1734 1735 jlong java_lang_Thread::thread_id(oop java_thread) { 1736 // The thread ID field is only present starting in 1.5 1737 if (_tid_offset > 0) { 1738 return java_thread->long_field(_tid_offset); 1739 } else { 1740 return 0; 1741 } 1742 } 1743 1744 oop java_lang_Thread::park_blocker(oop java_thread) { 1745 assert(JDK_Version::current().supports_thread_park_blocker() && 1746 _park_blocker_offset != 0, "Must support parkBlocker field"); 1747 1748 if (_park_blocker_offset > 0) { 1749 return java_thread->obj_field(_park_blocker_offset); 1750 } 1751 1752 return NULL; 1753 } 1754 1755 jlong java_lang_Thread::park_event(oop java_thread) { 1756 if (_park_event_offset > 0) { 1757 return java_thread->long_field(_park_event_offset); 1758 } 1759 return 0; 1760 } 1761 1762 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1763 if (_park_event_offset > 0) { 1764 java_thread->long_field_put(_park_event_offset, ptr); 1765 return true; 1766 } 1767 return false; 1768 } 1769 1770 1771 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1772 assert(_thread_status_offset != 0, "Must have thread status"); 1773 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1774 switch (status) { 1775 case NEW : return "NEW"; 1776 case RUNNABLE : return "RUNNABLE"; 1777 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1778 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1779 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1780 case PARKED : return "WAITING (parking)"; 1781 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1782 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1783 case TERMINATED : return "TERMINATED"; 1784 default : return "UNKNOWN"; 1785 }; 1786 } 1787 int java_lang_ThreadGroup::_parent_offset = 0; 1788 int java_lang_ThreadGroup::_name_offset = 0; 1789 int java_lang_ThreadGroup::_threads_offset = 0; 1790 int java_lang_ThreadGroup::_groups_offset = 0; 1791 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1792 int java_lang_ThreadGroup::_destroyed_offset = 0; 1793 int java_lang_ThreadGroup::_daemon_offset = 0; 1794 int java_lang_ThreadGroup::_nthreads_offset = 0; 1795 int java_lang_ThreadGroup::_ngroups_offset = 0; 1796 1797 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1798 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1799 return java_thread_group->obj_field(_parent_offset); 1800 } 1801 1802 // ("name as oop" accessor is not necessary) 1803 1804 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1805 oop name = java_thread_group->obj_field(_name_offset); 1806 // ThreadGroup.name can be null 1807 if (name != NULL) { 1808 return java_lang_String::as_utf8_string(name); 1809 } 1810 return NULL; 1811 } 1812 1813 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1815 return java_thread_group->int_field(_nthreads_offset); 1816 } 1817 1818 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1819 oop threads = java_thread_group->obj_field(_threads_offset); 1820 assert(threads != NULL, "threadgroups should have threads"); 1821 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1822 return objArrayOop(threads); 1823 } 1824 1825 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1826 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1827 return java_thread_group->int_field(_ngroups_offset); 1828 } 1829 1830 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1831 oop groups = java_thread_group->obj_field(_groups_offset); 1832 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1833 return objArrayOop(groups); 1834 } 1835 1836 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1838 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1839 } 1840 1841 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1842 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1843 return java_thread_group->bool_field(_destroyed_offset) != 0; 1844 } 1845 1846 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1847 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1848 return java_thread_group->bool_field(_daemon_offset) != 0; 1849 } 1850 1851 #define THREADGROUP_FIELDS_DO(macro) \ 1852 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1853 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1854 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1855 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1856 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1857 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1858 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1859 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1860 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1861 1862 void java_lang_ThreadGroup::compute_offsets() { 1863 assert(_parent_offset == 0, "offsets should be initialized only once"); 1864 1865 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1866 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1867 } 1868 1869 #if INCLUDE_CDS 1870 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1871 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1872 } 1873 #endif 1874 1875 #define THROWABLE_FIELDS_DO(macro) \ 1876 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1877 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1878 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1879 macro(depth_offset, k, "depth", int_signature, false); \ 1880 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1881 1882 void java_lang_Throwable::compute_offsets() { 1883 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1884 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1885 } 1886 1887 #if INCLUDE_CDS 1888 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1889 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1890 } 1891 #endif 1892 1893 oop java_lang_Throwable::unassigned_stacktrace() { 1894 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1895 oop base = ik->static_field_base_raw(); 1896 return base->obj_field(static_unassigned_stacktrace_offset); 1897 } 1898 1899 oop java_lang_Throwable::backtrace(oop throwable) { 1900 return throwable->obj_field_acquire(backtrace_offset); 1901 } 1902 1903 1904 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1905 throwable->release_obj_field_put(backtrace_offset, value); 1906 } 1907 1908 int java_lang_Throwable::depth(oop throwable) { 1909 return throwable->int_field(depth_offset); 1910 } 1911 1912 void java_lang_Throwable::set_depth(oop throwable, int value) { 1913 throwable->int_field_put(depth_offset, value); 1914 } 1915 1916 oop java_lang_Throwable::message(oop throwable) { 1917 return throwable->obj_field(detailMessage_offset); 1918 } 1919 1920 1921 // Return Symbol for detailed_message or NULL 1922 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1923 PRESERVE_EXCEPTION_MARK; // Keep original exception 1924 oop detailed_message = java_lang_Throwable::message(throwable); 1925 if (detailed_message != NULL) { 1926 return java_lang_String::as_symbol(detailed_message, THREAD); 1927 } 1928 return NULL; 1929 } 1930 1931 void java_lang_Throwable::set_message(oop throwable, oop value) { 1932 throwable->obj_field_put(detailMessage_offset, value); 1933 } 1934 1935 1936 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1937 throwable->obj_field_put(stackTrace_offset, st_element_array); 1938 } 1939 1940 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1941 set_stacktrace(throwable, NULL); 1942 } 1943 1944 1945 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1946 ResourceMark rm; 1947 Klass* k = throwable->klass(); 1948 assert(k != NULL, "just checking"); 1949 st->print("%s", k->external_name()); 1950 oop msg = message(throwable); 1951 if (msg != NULL) { 1952 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1953 } 1954 } 1955 1956 // After this many redefines, the stack trace is unreliable. 1957 const int MAX_VERSION = USHRT_MAX; 1958 1959 static inline bool version_matches(Method* method, int version) { 1960 assert(version < MAX_VERSION, "version is too big"); 1961 return method != NULL && (method->constants()->version() == version); 1962 } 1963 1964 1965 // This class provides a simple wrapper over the internal structure of 1966 // exception backtrace to insulate users of the backtrace from needing 1967 // to know what it looks like. 1968 class BacktraceBuilder: public StackObj { 1969 friend class BacktraceIterator; 1970 private: 1971 Handle _backtrace; 1972 objArrayOop _head; 1973 typeArrayOop _methods; 1974 typeArrayOop _bcis; 1975 objArrayOop _mirrors; 1976 typeArrayOop _names; // needed to insulate method name against redefinition 1977 int _index; 1978 NoSafepointVerifier _nsv; 1979 1980 enum { 1981 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1982 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1983 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1984 trace_names_offset = java_lang_Throwable::trace_names_offset, 1985 trace_next_offset = java_lang_Throwable::trace_next_offset, 1986 trace_size = java_lang_Throwable::trace_size, 1987 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1988 }; 1989 1990 // get info out of chunks 1991 static typeArrayOop get_methods(objArrayHandle chunk) { 1992 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1993 assert(methods != NULL, "method array should be initialized in backtrace"); 1994 return methods; 1995 } 1996 static typeArrayOop get_bcis(objArrayHandle chunk) { 1997 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1998 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1999 return bcis; 2000 } 2001 static objArrayOop get_mirrors(objArrayHandle chunk) { 2002 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2003 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2004 return mirrors; 2005 } 2006 static typeArrayOop get_names(objArrayHandle chunk) { 2007 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2008 assert(names != NULL, "names array should be initialized in backtrace"); 2009 return names; 2010 } 2011 2012 public: 2013 2014 // constructor for new backtrace 2015 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2016 expand(CHECK); 2017 _backtrace = Handle(THREAD, _head); 2018 _index = 0; 2019 } 2020 2021 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2022 _methods = get_methods(backtrace); 2023 _bcis = get_bcis(backtrace); 2024 _mirrors = get_mirrors(backtrace); 2025 _names = get_names(backtrace); 2026 assert(_methods->length() == _bcis->length() && 2027 _methods->length() == _mirrors->length() && 2028 _mirrors->length() == _names->length(), 2029 "method and source information arrays should match"); 2030 2031 // head is the preallocated backtrace 2032 _head = backtrace(); 2033 _backtrace = Handle(thread, _head); 2034 _index = 0; 2035 } 2036 2037 void expand(TRAPS) { 2038 objArrayHandle old_head(THREAD, _head); 2039 PauseNoSafepointVerifier pnsv(&_nsv); 2040 2041 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2042 objArrayHandle new_head(THREAD, head); 2043 2044 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2045 typeArrayHandle new_methods(THREAD, methods); 2046 2047 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2048 typeArrayHandle new_bcis(THREAD, bcis); 2049 2050 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2051 objArrayHandle new_mirrors(THREAD, mirrors); 2052 2053 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2054 typeArrayHandle new_names(THREAD, names); 2055 2056 if (!old_head.is_null()) { 2057 old_head->obj_at_put(trace_next_offset, new_head()); 2058 } 2059 new_head->obj_at_put(trace_methods_offset, new_methods()); 2060 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2061 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2062 new_head->obj_at_put(trace_names_offset, new_names()); 2063 2064 _head = new_head(); 2065 _methods = new_methods(); 2066 _bcis = new_bcis(); 2067 _mirrors = new_mirrors(); 2068 _names = new_names(); 2069 _index = 0; 2070 } 2071 2072 oop backtrace() { 2073 return _backtrace(); 2074 } 2075 2076 inline void push(Method* method, int bci, TRAPS) { 2077 // Smear the -1 bci to 0 since the array only holds unsigned 2078 // shorts. The later line number lookup would just smear the -1 2079 // to a 0 even if it could be recorded. 2080 if (bci == SynchronizationEntryBCI) bci = 0; 2081 2082 if (_index >= trace_chunk_size) { 2083 methodHandle mhandle(THREAD, method); 2084 expand(CHECK); 2085 method = mhandle(); 2086 } 2087 2088 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2089 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2090 2091 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2092 // klass owning the symbols alive so their refcounts aren't decremented. 2093 Symbol* name = method->name(); 2094 _names->symbol_at_put(_index, name); 2095 2096 // We need to save the mirrors in the backtrace to keep the class 2097 // from being unloaded while we still have this stack trace. 2098 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2099 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2100 _index++; 2101 } 2102 2103 }; 2104 2105 struct BacktraceElement : public StackObj { 2106 int _method_id; 2107 int _bci; 2108 int _version; 2109 Symbol* _name; 2110 Handle _mirror; 2111 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2112 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2113 }; 2114 2115 class BacktraceIterator : public StackObj { 2116 int _index; 2117 objArrayHandle _result; 2118 objArrayHandle _mirrors; 2119 typeArrayHandle _methods; 2120 typeArrayHandle _bcis; 2121 typeArrayHandle _names; 2122 2123 void init(objArrayHandle result, Thread* thread) { 2124 // Get method id, bci, version and mirror from chunk 2125 _result = result; 2126 if (_result.not_null()) { 2127 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2128 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2129 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2130 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2131 _index = 0; 2132 } 2133 } 2134 public: 2135 BacktraceIterator(objArrayHandle result, Thread* thread) { 2136 init(result, thread); 2137 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2138 } 2139 2140 BacktraceElement next(Thread* thread) { 2141 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2142 _methods->ushort_at(_index), 2143 Backtrace::version_at(_bcis->int_at(_index)), 2144 Backtrace::bci_at(_bcis->int_at(_index)), 2145 _names->symbol_at(_index)); 2146 _index++; 2147 2148 if (_index >= java_lang_Throwable::trace_chunk_size) { 2149 int next_offset = java_lang_Throwable::trace_next_offset; 2150 // Get next chunk 2151 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2152 init(result, thread); 2153 } 2154 return e; 2155 } 2156 2157 bool repeat() { 2158 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2159 } 2160 }; 2161 2162 2163 // Print stack trace element to resource allocated buffer 2164 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2165 int version, int bci, Symbol* name) { 2166 ResourceMark rm; 2167 2168 // Get strings and string lengths 2169 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2170 const char* klass_name = holder->external_name(); 2171 int buf_len = (int)strlen(klass_name); 2172 2173 char* method_name = name->as_C_string(); 2174 buf_len += (int)strlen(method_name); 2175 2176 char* source_file_name = NULL; 2177 Symbol* source = Backtrace::get_source_file_name(holder, version); 2178 if (source != NULL) { 2179 source_file_name = source->as_C_string(); 2180 buf_len += (int)strlen(source_file_name); 2181 } 2182 2183 char *module_name = NULL, *module_version = NULL; 2184 ModuleEntry* module = holder->module(); 2185 if (module->is_named()) { 2186 module_name = module->name()->as_C_string(); 2187 buf_len += (int)strlen(module_name); 2188 if (module->version() != NULL) { 2189 module_version = module->version()->as_C_string(); 2190 buf_len += (int)strlen(module_version); 2191 } 2192 } 2193 2194 // Allocate temporary buffer with extra space for formatting and line number 2195 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2196 2197 // Print stack trace line in buffer 2198 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2199 2200 // Print module information 2201 if (module_name != NULL) { 2202 if (module_version != NULL) { 2203 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2204 } else { 2205 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2206 } 2207 } 2208 2209 // The method can be NULL if the requested class version is gone 2210 Method* method = holder->method_with_orig_idnum(method_id, version); 2211 if (!version_matches(method, version)) { 2212 strcat(buf, "Redefined)"); 2213 } else { 2214 int line_number = Backtrace::get_line_number(method, bci); 2215 if (line_number == -2) { 2216 strcat(buf, "Native Method)"); 2217 } else { 2218 if (source_file_name != NULL && (line_number != -1)) { 2219 // Sourcename and linenumber 2220 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2221 } else if (source_file_name != NULL) { 2222 // Just sourcename 2223 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2224 } else { 2225 // Neither sourcename nor linenumber 2226 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2227 } 2228 CompiledMethod* nm = method->code(); 2229 if (WizardMode && nm != NULL) { 2230 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2231 } 2232 } 2233 } 2234 2235 st->print_cr("%s", buf); 2236 } 2237 2238 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2239 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2240 int method_id = method->orig_method_idnum(); 2241 int version = method->constants()->version(); 2242 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2243 } 2244 2245 /** 2246 * Print the throwable message and its stack trace plus all causes by walking the 2247 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2248 */ 2249 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2250 // First, print the message. 2251 print(throwable(), st); 2252 st->cr(); 2253 2254 // Now print the stack trace. 2255 Thread* THREAD = Thread::current(); 2256 while (throwable.not_null()) { 2257 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2258 if (result.is_null()) { 2259 st->print_raw_cr("\t<<no stack trace available>>"); 2260 return; 2261 } 2262 BacktraceIterator iter(result, THREAD); 2263 2264 while (iter.repeat()) { 2265 BacktraceElement bte = iter.next(THREAD); 2266 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2267 } 2268 { 2269 // Call getCause() which doesn't necessarily return the _cause field. 2270 EXCEPTION_MARK; 2271 JavaValue cause(T_OBJECT); 2272 JavaCalls::call_virtual(&cause, 2273 throwable, 2274 throwable->klass(), 2275 vmSymbols::getCause_name(), 2276 vmSymbols::void_throwable_signature(), 2277 THREAD); 2278 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2279 if (HAS_PENDING_EXCEPTION) { 2280 CLEAR_PENDING_EXCEPTION; 2281 throwable = Handle(); 2282 } else { 2283 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2284 if (throwable.not_null()) { 2285 st->print("Caused by: "); 2286 print(throwable(), st); 2287 st->cr(); 2288 } 2289 } 2290 } 2291 } 2292 } 2293 2294 /** 2295 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2296 */ 2297 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2298 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2299 JavaValue result(T_VOID); 2300 JavaCalls::call_virtual(&result, 2301 throwable, 2302 SystemDictionary::Throwable_klass(), 2303 vmSymbols::printStackTrace_name(), 2304 vmSymbols::void_method_signature(), 2305 THREAD); 2306 } 2307 2308 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2309 if (!StackTraceInThrowable) return; 2310 ResourceMark rm(THREAD); 2311 2312 // Start out by clearing the backtrace for this object, in case the VM 2313 // runs out of memory while allocating the stack trace 2314 set_backtrace(throwable(), NULL); 2315 // Clear lazily constructed Java level stacktrace if refilling occurs 2316 // This is unnecessary in 1.7+ but harmless 2317 clear_stacktrace(throwable()); 2318 2319 int max_depth = MaxJavaStackTraceDepth; 2320 JavaThread* thread = (JavaThread*)THREAD; 2321 2322 BacktraceBuilder bt(CHECK); 2323 2324 // If there is no Java frame just return the method that was being called 2325 // with bci 0 2326 if (!thread->has_last_Java_frame()) { 2327 if (max_depth >= 1 && method() != NULL) { 2328 bt.push(method(), 0, CHECK); 2329 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2330 set_depth(throwable(), 1); 2331 set_backtrace(throwable(), bt.backtrace()); 2332 } 2333 return; 2334 } 2335 2336 // Instead of using vframe directly, this version of fill_in_stack_trace 2337 // basically handles everything by hand. This significantly improved the 2338 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2339 // See bug 6333838 for more details. 2340 // The "ASSERT" here is to verify this method generates the exactly same stack 2341 // trace as utilizing vframe. 2342 #ifdef ASSERT 2343 vframeStream st(thread); 2344 methodHandle st_method(THREAD, st.method()); 2345 #endif 2346 int total_count = 0; 2347 RegisterMap map(thread, false); 2348 int decode_offset = 0; 2349 CompiledMethod* nm = NULL; 2350 bool skip_fillInStackTrace_check = false; 2351 bool skip_throwableInit_check = false; 2352 bool skip_hidden = !ShowHiddenFrames; 2353 2354 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2355 Method* method = NULL; 2356 int bci = 0; 2357 2358 // Compiled java method case. 2359 if (decode_offset != 0) { 2360 DebugInfoReadStream stream(nm, decode_offset); 2361 decode_offset = stream.read_int(); 2362 method = (Method*)nm->metadata_at(stream.read_int()); 2363 bci = stream.read_bci(); 2364 } else { 2365 if (fr.is_first_frame()) break; 2366 address pc = fr.pc(); 2367 if (fr.is_interpreted_frame()) { 2368 address bcp = fr.interpreter_frame_bcp(); 2369 method = fr.interpreter_frame_method(); 2370 bci = method->bci_from(bcp); 2371 fr = fr.sender(&map); 2372 } else { 2373 CodeBlob* cb = fr.cb(); 2374 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2375 // but non nmethod 2376 fr = fr.sender(&map); 2377 if (cb == NULL || !cb->is_compiled()) { 2378 continue; 2379 } 2380 nm = cb->as_compiled_method(); 2381 if (nm->method()->is_native()) { 2382 method = nm->method(); 2383 bci = 0; 2384 } else { 2385 PcDesc* pd = nm->pc_desc_at(pc); 2386 decode_offset = pd->scope_decode_offset(); 2387 // if decode_offset is not equal to 0, it will execute the 2388 // "compiled java method case" at the beginning of the loop. 2389 continue; 2390 } 2391 } 2392 } 2393 #ifdef ASSERT 2394 assert(st_method() == method && st.bci() == bci, 2395 "Wrong stack trace"); 2396 st.next(); 2397 // vframeStream::method isn't GC-safe so store off a copy 2398 // of the Method* in case we GC. 2399 if (!st.at_end()) { 2400 st_method = st.method(); 2401 } 2402 #endif 2403 2404 // the format of the stacktrace will be: 2405 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2406 // - 0 or more <init> methods for the exception class (skipped) 2407 // - rest of the stack 2408 2409 if (!skip_fillInStackTrace_check) { 2410 if (method->name() == vmSymbols::fillInStackTrace_name() && 2411 throwable->is_a(method->method_holder())) { 2412 continue; 2413 } 2414 else { 2415 skip_fillInStackTrace_check = true; // gone past them all 2416 } 2417 } 2418 if (!skip_throwableInit_check) { 2419 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2420 2421 // skip <init> methods of the exception class and superclasses 2422 // This is simlar to classic VM. 2423 if (method->name() == vmSymbols::object_initializer_name() && 2424 throwable->is_a(method->method_holder())) { 2425 continue; 2426 } else { 2427 // there are none or we've seen them all - either way stop checking 2428 skip_throwableInit_check = true; 2429 } 2430 } 2431 if (method->is_hidden()) { 2432 if (skip_hidden) continue; 2433 } 2434 bt.push(method, bci, CHECK); 2435 total_count++; 2436 } 2437 2438 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2439 2440 // Put completed stack trace into throwable object 2441 set_backtrace(throwable(), bt.backtrace()); 2442 set_depth(throwable(), total_count); 2443 } 2444 2445 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2446 // No-op if stack trace is disabled 2447 if (!StackTraceInThrowable) { 2448 return; 2449 } 2450 2451 // Disable stack traces for some preallocated out of memory errors 2452 if (!Universe::should_fill_in_stack_trace(throwable)) { 2453 return; 2454 } 2455 2456 PRESERVE_EXCEPTION_MARK; 2457 2458 JavaThread* thread = JavaThread::active(); 2459 fill_in_stack_trace(throwable, method, thread); 2460 // ignore exceptions thrown during stack trace filling 2461 CLEAR_PENDING_EXCEPTION; 2462 } 2463 2464 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2465 // Allocate stack trace - backtrace is created but not filled in 2466 2467 // No-op if stack trace is disabled 2468 if (!StackTraceInThrowable) return; 2469 BacktraceBuilder bt(CHECK); // creates a backtrace 2470 set_backtrace(throwable(), bt.backtrace()); 2471 } 2472 2473 2474 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2475 // Fill in stack trace into preallocated backtrace (no GC) 2476 2477 // No-op if stack trace is disabled 2478 if (!StackTraceInThrowable) return; 2479 2480 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2481 2482 JavaThread* THREAD = JavaThread::current(); 2483 2484 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2485 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2486 2487 ResourceMark rm(THREAD); 2488 vframeStream st(THREAD); 2489 2490 BacktraceBuilder bt(THREAD, backtrace); 2491 2492 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2493 // methods as preallocated errors aren't created by "java" code. 2494 2495 // fill in as much stack trace as possible 2496 int chunk_count = 0; 2497 for (;!st.at_end(); st.next()) { 2498 bt.push(st.method(), st.bci(), CHECK); 2499 chunk_count++; 2500 2501 // Bail-out for deep stacks 2502 if (chunk_count >= trace_chunk_size) break; 2503 } 2504 set_depth(throwable(), chunk_count); 2505 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2506 2507 // We support the Throwable immutability protocol defined for Java 7. 2508 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2509 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2510 } 2511 2512 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2513 objArrayHandle stack_trace_array_h, TRAPS) { 2514 2515 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2516 THROW(vmSymbols::java_lang_NullPointerException()); 2517 } 2518 2519 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2520 2521 if (stack_trace_array_h->length() != depth(throwable())) { 2522 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2523 } 2524 2525 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2526 BacktraceIterator iter(result, THREAD); 2527 2528 int index = 0; 2529 while (iter.repeat()) { 2530 BacktraceElement bte = iter.next(THREAD); 2531 2532 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2533 2534 if (stack_trace_element.is_null()) { 2535 THROW(vmSymbols::java_lang_NullPointerException()); 2536 } 2537 2538 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2539 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2540 2541 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2542 method, 2543 bte._version, 2544 bte._bci, 2545 bte._name, CHECK); 2546 } 2547 } 2548 2549 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2550 // Allocate java.lang.StackTraceElement instance 2551 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2552 assert(k != NULL, "must be loaded in 1.4+"); 2553 if (k->should_be_initialized()) { 2554 k->initialize(CHECK_0); 2555 } 2556 2557 Handle element = k->allocate_instance_handle(CHECK_0); 2558 2559 int version = method->constants()->version(); 2560 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2561 return element(); 2562 } 2563 2564 void java_lang_StackTraceElement::fill_in(Handle element, 2565 InstanceKlass* holder, const methodHandle& method, 2566 int version, int bci, Symbol* name, TRAPS) { 2567 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2568 2569 ResourceMark rm(THREAD); 2570 HandleMark hm(THREAD); 2571 2572 // Fill in class name 2573 Handle java_class(THREAD, holder->java_mirror()); 2574 oop classname = java_lang_Class::name(java_class, CHECK); 2575 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2576 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2577 2578 oop loader = holder->class_loader(); 2579 if (loader != NULL) { 2580 oop loader_name = java_lang_ClassLoader::name(loader); 2581 if (loader_name != NULL) 2582 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2583 } 2584 2585 // Fill in method name 2586 oop methodname = StringTable::intern(name, CHECK); 2587 java_lang_StackTraceElement::set_methodName(element(), methodname); 2588 2589 // Fill in module name and version 2590 ModuleEntry* module = holder->module(); 2591 if (module->is_named()) { 2592 oop module_name = StringTable::intern(module->name(), CHECK); 2593 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2594 oop module_version; 2595 if (module->version() != NULL) { 2596 module_version = StringTable::intern(module->version(), CHECK); 2597 } else { 2598 module_version = NULL; 2599 } 2600 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2601 } 2602 2603 if (method() == NULL || !version_matches(method(), version)) { 2604 // The method was redefined, accurate line number information isn't available 2605 java_lang_StackTraceElement::set_fileName(element(), NULL); 2606 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2607 } else { 2608 // Fill in source file name and line number. 2609 Symbol* source = Backtrace::get_source_file_name(holder, version); 2610 oop source_file = java_lang_Class::source_file(java_class()); 2611 if (source != NULL) { 2612 // Class was not redefined. We can trust its cache if set, 2613 // else we have to initialize it. 2614 if (source_file == NULL) { 2615 source_file = StringTable::intern(source, CHECK); 2616 java_lang_Class::set_source_file(java_class(), source_file); 2617 } 2618 } else { 2619 // Class was redefined. Dump the cache if it was set. 2620 if (source_file != NULL) { 2621 source_file = NULL; 2622 java_lang_Class::set_source_file(java_class(), source_file); 2623 } 2624 if (ShowHiddenFrames) { 2625 source = vmSymbols::unknown_class_name(); 2626 source_file = StringTable::intern(source, CHECK); 2627 } 2628 } 2629 java_lang_StackTraceElement::set_fileName(element(), source_file); 2630 2631 int line_number = Backtrace::get_line_number(method, bci); 2632 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2633 } 2634 } 2635 2636 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2637 HandleMark hm(THREAD); 2638 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2639 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2640 // we should expand MemberName::name when Throwable uses StackTrace 2641 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2642 return method; 2643 } 2644 2645 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2646 // set Method* or mid/cpref 2647 HandleMark hm(THREAD); 2648 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2649 InstanceKlass* ik = method->method_holder(); 2650 CallInfo info(method(), ik, CHECK); 2651 MethodHandles::init_method_MemberName(mname, info); 2652 // set bci 2653 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2654 // method may be redefined; store the version 2655 int version = method->constants()->version(); 2656 assert((jushort)version == version, "version should be short"); 2657 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2658 } 2659 2660 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2661 ResourceMark rm(THREAD); 2662 HandleMark hm(THREAD); 2663 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2664 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2665 InstanceKlass* holder = InstanceKlass::cast(clazz); 2666 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2667 2668 short version = stackFrame->short_field(_version_offset); 2669 short bci = stackFrame->short_field(_bci_offset); 2670 Symbol* name = method->name(); 2671 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2672 } 2673 2674 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2675 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2676 macro(_bci_offset, k, "bci", short_signature, false) 2677 2678 void java_lang_StackFrameInfo::compute_offsets() { 2679 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2680 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2681 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2682 } 2683 2684 #if INCLUDE_CDS 2685 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2686 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2687 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2688 } 2689 #endif 2690 2691 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2692 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2693 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2694 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2695 macro(_mode_offset, k, "mode", int_signature, false) 2696 2697 void java_lang_LiveStackFrameInfo::compute_offsets() { 2698 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2699 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2700 } 2701 2702 #if INCLUDE_CDS 2703 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2704 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2705 } 2706 #endif 2707 2708 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2709 macro(override_offset, k, "override", bool_signature, false) 2710 2711 void java_lang_reflect_AccessibleObject::compute_offsets() { 2712 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2713 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2714 } 2715 2716 #if INCLUDE_CDS 2717 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2718 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2719 } 2720 #endif 2721 2722 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2723 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2724 return (jboolean) reflect->bool_field(override_offset); 2725 } 2726 2727 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2729 reflect->bool_field_put(override_offset, (int) value); 2730 } 2731 2732 #define METHOD_FIELDS_DO(macro) \ 2733 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2734 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2735 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2736 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2737 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2738 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2739 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2740 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2741 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2742 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2743 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2744 2745 void java_lang_reflect_Method::compute_offsets() { 2746 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2747 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2748 } 2749 2750 #if INCLUDE_CDS 2751 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2752 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2753 } 2754 #endif 2755 2756 Handle java_lang_reflect_Method::create(TRAPS) { 2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2758 Klass* klass = SystemDictionary::reflect_Method_klass(); 2759 // This class is eagerly initialized during VM initialization, since we keep a refence 2760 // to one of the methods 2761 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2762 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2763 } 2764 2765 oop java_lang_reflect_Method::clazz(oop reflect) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 return reflect->obj_field(clazz_offset); 2768 } 2769 2770 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 reflect->obj_field_put(clazz_offset, value); 2773 } 2774 2775 int java_lang_reflect_Method::slot(oop reflect) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 return reflect->int_field(slot_offset); 2778 } 2779 2780 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 reflect->int_field_put(slot_offset, value); 2783 } 2784 2785 void java_lang_reflect_Method::set_name(oop method, oop value) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 method->obj_field_put(name_offset, value); 2788 } 2789 2790 oop java_lang_reflect_Method::return_type(oop method) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 return method->obj_field(returnType_offset); 2793 } 2794 2795 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 method->obj_field_put(returnType_offset, value); 2798 } 2799 2800 oop java_lang_reflect_Method::parameter_types(oop method) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 return method->obj_field(parameterTypes_offset); 2803 } 2804 2805 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 method->obj_field_put(parameterTypes_offset, value); 2808 } 2809 2810 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 method->obj_field_put(exceptionTypes_offset, value); 2813 } 2814 2815 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2817 method->int_field_put(modifiers_offset, value); 2818 } 2819 2820 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2821 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2822 method->obj_field_put(signature_offset, value); 2823 } 2824 2825 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2827 method->obj_field_put(annotations_offset, value); 2828 } 2829 2830 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2832 method->obj_field_put(parameter_annotations_offset, value); 2833 } 2834 2835 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2837 method->obj_field_put(annotation_default_offset, value); 2838 } 2839 2840 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2841 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2842 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2843 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2844 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2845 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2846 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2847 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2848 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2849 2850 void java_lang_reflect_Constructor::compute_offsets() { 2851 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2852 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2853 } 2854 2855 #if INCLUDE_CDS 2856 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2857 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2858 } 2859 #endif 2860 2861 Handle java_lang_reflect_Constructor::create(TRAPS) { 2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2863 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2864 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2865 InstanceKlass* ik = InstanceKlass::cast(k); 2866 // Ensure it is initialized 2867 ik->initialize(CHECK_NH); 2868 return ik->allocate_instance_handle(THREAD); 2869 } 2870 2871 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2873 return reflect->obj_field(clazz_offset); 2874 } 2875 2876 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 reflect->obj_field_put(clazz_offset, value); 2879 } 2880 2881 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2882 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2883 return constructor->obj_field(parameterTypes_offset); 2884 } 2885 2886 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2888 constructor->obj_field_put(parameterTypes_offset, value); 2889 } 2890 2891 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2893 constructor->obj_field_put(exceptionTypes_offset, value); 2894 } 2895 2896 int java_lang_reflect_Constructor::slot(oop reflect) { 2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2898 return reflect->int_field(slot_offset); 2899 } 2900 2901 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2903 reflect->int_field_put(slot_offset, value); 2904 } 2905 2906 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2907 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2908 constructor->int_field_put(modifiers_offset, value); 2909 } 2910 2911 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2912 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2913 constructor->obj_field_put(signature_offset, value); 2914 } 2915 2916 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2918 constructor->obj_field_put(annotations_offset, value); 2919 } 2920 2921 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2923 method->obj_field_put(parameter_annotations_offset, value); 2924 } 2925 2926 #define FIELD_FIELDS_DO(macro) \ 2927 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2928 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2929 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2930 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2931 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2932 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2933 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2934 2935 void java_lang_reflect_Field::compute_offsets() { 2936 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2937 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2938 } 2939 2940 #if INCLUDE_CDS 2941 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2942 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2943 } 2944 #endif 2945 2946 Handle java_lang_reflect_Field::create(TRAPS) { 2947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2948 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2949 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2950 InstanceKlass* ik = InstanceKlass::cast(k); 2951 // Ensure it is initialized 2952 ik->initialize(CHECK_NH); 2953 return ik->allocate_instance_handle(THREAD); 2954 } 2955 2956 oop java_lang_reflect_Field::clazz(oop reflect) { 2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2958 return reflect->obj_field(clazz_offset); 2959 } 2960 2961 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2963 reflect->obj_field_put(clazz_offset, value); 2964 } 2965 2966 oop java_lang_reflect_Field::name(oop field) { 2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2968 return field->obj_field(name_offset); 2969 } 2970 2971 void java_lang_reflect_Field::set_name(oop field, oop value) { 2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2973 field->obj_field_put(name_offset, value); 2974 } 2975 2976 oop java_lang_reflect_Field::type(oop field) { 2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2978 return field->obj_field(type_offset); 2979 } 2980 2981 void java_lang_reflect_Field::set_type(oop field, oop value) { 2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2983 field->obj_field_put(type_offset, value); 2984 } 2985 2986 int java_lang_reflect_Field::slot(oop reflect) { 2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2988 return reflect->int_field(slot_offset); 2989 } 2990 2991 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2993 reflect->int_field_put(slot_offset, value); 2994 } 2995 2996 int java_lang_reflect_Field::modifiers(oop field) { 2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2998 return field->int_field(modifiers_offset); 2999 } 3000 3001 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3003 field->int_field_put(modifiers_offset, value); 3004 } 3005 3006 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3008 field->obj_field_put(signature_offset, value); 3009 } 3010 3011 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3013 field->obj_field_put(annotations_offset, value); 3014 } 3015 3016 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3017 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3018 3019 void reflect_ConstantPool::compute_offsets() { 3020 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3021 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3022 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3023 } 3024 3025 #if INCLUDE_CDS 3026 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3027 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3028 } 3029 #endif 3030 3031 #define PARAMETER_FIELDS_DO(macro) \ 3032 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3033 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3034 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3035 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3036 3037 void java_lang_reflect_Parameter::compute_offsets() { 3038 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3039 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3040 } 3041 3042 #if INCLUDE_CDS 3043 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3044 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3045 } 3046 #endif 3047 3048 Handle java_lang_reflect_Parameter::create(TRAPS) { 3049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3050 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3051 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3052 InstanceKlass* ik = InstanceKlass::cast(k); 3053 // Ensure it is initialized 3054 ik->initialize(CHECK_NH); 3055 return ik->allocate_instance_handle(THREAD); 3056 } 3057 3058 oop java_lang_reflect_Parameter::name(oop param) { 3059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3060 return param->obj_field(name_offset); 3061 } 3062 3063 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3065 param->obj_field_put(name_offset, value); 3066 } 3067 3068 int java_lang_reflect_Parameter::modifiers(oop param) { 3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3070 return param->int_field(modifiers_offset); 3071 } 3072 3073 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3075 param->int_field_put(modifiers_offset, value); 3076 } 3077 3078 int java_lang_reflect_Parameter::index(oop param) { 3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3080 return param->int_field(index_offset); 3081 } 3082 3083 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3085 param->int_field_put(index_offset, value); 3086 } 3087 3088 oop java_lang_reflect_Parameter::executable(oop param) { 3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3090 return param->obj_field(executable_offset); 3091 } 3092 3093 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3095 param->obj_field_put(executable_offset, value); 3096 } 3097 3098 3099 int java_lang_Module::loader_offset; 3100 int java_lang_Module::name_offset; 3101 int java_lang_Module::_module_entry_offset = -1; 3102 3103 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3105 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3106 vmSymbols::java_lang_module_init_signature(), 3107 loader, module_name, CHECK_NH); 3108 } 3109 3110 #define MODULE_FIELDS_DO(macro) \ 3111 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3112 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3113 3114 void java_lang_Module::compute_offsets() { 3115 InstanceKlass* k = SystemDictionary::Module_klass(); 3116 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3117 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3118 } 3119 3120 #if INCLUDE_CDS 3121 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3122 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3123 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3124 } 3125 #endif 3126 3127 oop java_lang_Module::loader(oop module) { 3128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3129 return module->obj_field(loader_offset); 3130 } 3131 3132 void java_lang_Module::set_loader(oop module, oop value) { 3133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3134 module->obj_field_put(loader_offset, value); 3135 } 3136 3137 oop java_lang_Module::name(oop module) { 3138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3139 return module->obj_field(name_offset); 3140 } 3141 3142 void java_lang_Module::set_name(oop module, oop value) { 3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3144 module->obj_field_put(name_offset, value); 3145 } 3146 3147 ModuleEntry* java_lang_Module::module_entry(oop module) { 3148 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3149 assert(module != NULL, "module can't be null"); 3150 assert(oopDesc::is_oop(module), "module must be oop"); 3151 3152 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3153 if (module_entry == NULL) { 3154 // If the inject field containing the ModuleEntry* is null then return the 3155 // class loader's unnamed module. 3156 oop loader = java_lang_Module::loader(module); 3157 Handle h_loader = Handle(Thread::current(), loader); 3158 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3159 return loader_cld->unnamed_module(); 3160 } 3161 return module_entry; 3162 } 3163 3164 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3165 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3166 assert(module != NULL, "module can't be null"); 3167 assert(oopDesc::is_oop(module), "module must be oop"); 3168 module->address_field_put(_module_entry_offset, (address)module_entry); 3169 } 3170 3171 Handle reflect_ConstantPool::create(TRAPS) { 3172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3173 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3174 // Ensure it is initialized 3175 k->initialize(CHECK_NH); 3176 return k->allocate_instance_handle(THREAD); 3177 } 3178 3179 3180 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3182 oop mirror = value->pool_holder()->java_mirror(); 3183 // Save the mirror to get back the constant pool. 3184 reflect->obj_field_put(_oop_offset, mirror); 3185 } 3186 3187 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3189 3190 oop mirror = reflect->obj_field(_oop_offset); 3191 Klass* k = java_lang_Class::as_Klass(mirror); 3192 assert(k->is_instance_klass(), "Must be"); 3193 3194 // Get the constant pool back from the klass. Since class redefinition 3195 // merges the new constant pool into the old, this is essentially the 3196 // same constant pool as the original. If constant pool merging is 3197 // no longer done in the future, this will have to change to save 3198 // the original. 3199 return InstanceKlass::cast(k)->constants(); 3200 } 3201 3202 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3203 macro(_base_offset, k, "base", object_signature, false) 3204 3205 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3206 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3207 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3208 } 3209 3210 #if INCLUDE_CDS 3211 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3212 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3213 } 3214 #endif 3215 3216 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3217 Klass* k = SystemDictionary::box_klass(type); 3218 if (k == NULL) return NULL; 3219 InstanceKlass* ik = InstanceKlass::cast(k); 3220 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3221 return ik->allocate_instance(THREAD); 3222 } 3223 3224 3225 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3226 oop box = initialize_and_allocate(type, CHECK_0); 3227 if (box == NULL) return NULL; 3228 switch (type) { 3229 case T_BOOLEAN: 3230 box->bool_field_put(value_offset, value->z); 3231 break; 3232 case T_CHAR: 3233 box->char_field_put(value_offset, value->c); 3234 break; 3235 case T_FLOAT: 3236 box->float_field_put(value_offset, value->f); 3237 break; 3238 case T_DOUBLE: 3239 box->double_field_put(long_value_offset, value->d); 3240 break; 3241 case T_BYTE: 3242 box->byte_field_put(value_offset, value->b); 3243 break; 3244 case T_SHORT: 3245 box->short_field_put(value_offset, value->s); 3246 break; 3247 case T_INT: 3248 box->int_field_put(value_offset, value->i); 3249 break; 3250 case T_LONG: 3251 box->long_field_put(long_value_offset, value->j); 3252 break; 3253 default: 3254 return NULL; 3255 } 3256 return box; 3257 } 3258 3259 3260 BasicType java_lang_boxing_object::basic_type(oop box) { 3261 if (box == NULL) return T_ILLEGAL; 3262 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3263 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3264 return T_ILLEGAL; 3265 return type; 3266 } 3267 3268 3269 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3270 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3271 switch (type) { 3272 case T_BOOLEAN: 3273 value->z = box->bool_field(value_offset); 3274 break; 3275 case T_CHAR: 3276 value->c = box->char_field(value_offset); 3277 break; 3278 case T_FLOAT: 3279 value->f = box->float_field(value_offset); 3280 break; 3281 case T_DOUBLE: 3282 value->d = box->double_field(long_value_offset); 3283 break; 3284 case T_BYTE: 3285 value->b = box->byte_field(value_offset); 3286 break; 3287 case T_SHORT: 3288 value->s = box->short_field(value_offset); 3289 break; 3290 case T_INT: 3291 value->i = box->int_field(value_offset); 3292 break; 3293 case T_LONG: 3294 value->j = box->long_field(long_value_offset); 3295 break; 3296 default: 3297 return T_ILLEGAL; 3298 } // end switch 3299 return type; 3300 } 3301 3302 3303 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3304 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3305 switch (type) { 3306 case T_BOOLEAN: 3307 box->bool_field_put(value_offset, value->z); 3308 break; 3309 case T_CHAR: 3310 box->char_field_put(value_offset, value->c); 3311 break; 3312 case T_FLOAT: 3313 box->float_field_put(value_offset, value->f); 3314 break; 3315 case T_DOUBLE: 3316 box->double_field_put(long_value_offset, value->d); 3317 break; 3318 case T_BYTE: 3319 box->byte_field_put(value_offset, value->b); 3320 break; 3321 case T_SHORT: 3322 box->short_field_put(value_offset, value->s); 3323 break; 3324 case T_INT: 3325 box->int_field_put(value_offset, value->i); 3326 break; 3327 case T_LONG: 3328 box->long_field_put(long_value_offset, value->j); 3329 break; 3330 default: 3331 return T_ILLEGAL; 3332 } // end switch 3333 return type; 3334 } 3335 3336 3337 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3338 switch (type) { 3339 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3340 case T_CHAR: st->print("%d", value->c); break; 3341 case T_BYTE: st->print("%d", value->b); break; 3342 case T_SHORT: st->print("%d", value->s); break; 3343 case T_INT: st->print("%d", value->i); break; 3344 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3345 case T_FLOAT: st->print("%f", value->f); break; 3346 case T_DOUBLE: st->print("%lf", value->d); break; 3347 default: st->print("type %d?", type); break; 3348 } 3349 } 3350 3351 // Support for java_lang_ref_Reference 3352 3353 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3354 assert(obj != NULL, "sanity"); 3355 if (offset != java_lang_ref_Reference::referent_offset) { 3356 return false; 3357 } 3358 3359 Klass* k = obj->klass(); 3360 if (!k->is_instance_klass()) { 3361 return false; 3362 } 3363 3364 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3365 bool is_reference = ik->reference_type() != REF_NONE; 3366 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3367 return is_reference; 3368 } 3369 3370 // Support for java_lang_ref_SoftReference 3371 // 3372 3373 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3374 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3375 macro(static_clock_offset, k, "clock", long_signature, true) 3376 3377 void java_lang_ref_SoftReference::compute_offsets() { 3378 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3379 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3380 } 3381 3382 #if INCLUDE_CDS 3383 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3384 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3385 } 3386 #endif 3387 3388 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3389 return ref->long_field(timestamp_offset); 3390 } 3391 3392 jlong java_lang_ref_SoftReference::clock() { 3393 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3394 oop base = ik->static_field_base_raw(); 3395 return base->long_field(static_clock_offset); 3396 } 3397 3398 void java_lang_ref_SoftReference::set_clock(jlong value) { 3399 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3400 oop base = ik->static_field_base_raw(); 3401 base->long_field_put(static_clock_offset, value); 3402 } 3403 3404 // Support for java_lang_invoke_DirectMethodHandle 3405 3406 int java_lang_invoke_DirectMethodHandle::_member_offset; 3407 3408 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3409 oop member_name = NULL; 3410 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3411 "a DirectMethodHandle oop is expected"); 3412 return dmh->obj_field(member_offset_in_bytes()); 3413 } 3414 3415 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3416 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3417 3418 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3419 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3420 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3421 } 3422 3423 #if INCLUDE_CDS 3424 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3425 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3426 } 3427 #endif 3428 3429 // Support for java_lang_invoke_MethodHandle 3430 3431 int java_lang_invoke_MethodHandle::_type_offset; 3432 int java_lang_invoke_MethodHandle::_form_offset; 3433 3434 int java_lang_invoke_MemberName::_clazz_offset; 3435 int java_lang_invoke_MemberName::_name_offset; 3436 int java_lang_invoke_MemberName::_type_offset; 3437 int java_lang_invoke_MemberName::_flags_offset; 3438 int java_lang_invoke_MemberName::_method_offset; 3439 int java_lang_invoke_MemberName::_vmindex_offset; 3440 3441 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3442 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3443 3444 int java_lang_invoke_LambdaForm::_vmentry_offset; 3445 3446 #define METHODHANDLE_FIELDS_DO(macro) \ 3447 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3448 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3449 3450 void java_lang_invoke_MethodHandle::compute_offsets() { 3451 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3452 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3453 } 3454 3455 #if INCLUDE_CDS 3456 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3457 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3458 } 3459 #endif 3460 3461 #define MEMBERNAME_FIELDS_DO(macro) \ 3462 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3463 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3464 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3465 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3466 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3467 3468 void java_lang_invoke_MemberName::compute_offsets() { 3469 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3470 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3471 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3472 } 3473 3474 #if INCLUDE_CDS 3475 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3476 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3477 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3478 } 3479 #endif 3480 3481 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3482 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3483 assert(k != NULL, "jdk mismatch"); 3484 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3485 } 3486 3487 #if INCLUDE_CDS 3488 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3489 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3490 } 3491 #endif 3492 3493 #define LAMBDAFORM_FIELDS_DO(macro) \ 3494 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3495 3496 void java_lang_invoke_LambdaForm::compute_offsets() { 3497 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3498 assert (k != NULL, "jdk mismatch"); 3499 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3500 } 3501 3502 #if INCLUDE_CDS 3503 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3504 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3505 } 3506 #endif 3507 3508 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3509 return obj != NULL && is_subclass(obj->klass()); 3510 } 3511 3512 3513 oop java_lang_invoke_MethodHandle::type(oop mh) { 3514 return mh->obj_field(_type_offset); 3515 } 3516 3517 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3518 mh->obj_field_put(_type_offset, mtype); 3519 } 3520 3521 oop java_lang_invoke_MethodHandle::form(oop mh) { 3522 assert(_form_offset != 0, ""); 3523 return mh->obj_field(_form_offset); 3524 } 3525 3526 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3527 assert(_form_offset != 0, ""); 3528 mh->obj_field_put(_form_offset, lform); 3529 } 3530 3531 /// MemberName accessors 3532 3533 oop java_lang_invoke_MemberName::clazz(oop mname) { 3534 assert(is_instance(mname), "wrong type"); 3535 return mname->obj_field(_clazz_offset); 3536 } 3537 3538 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3539 assert(is_instance(mname), "wrong type"); 3540 mname->obj_field_put(_clazz_offset, clazz); 3541 } 3542 3543 oop java_lang_invoke_MemberName::name(oop mname) { 3544 assert(is_instance(mname), "wrong type"); 3545 return mname->obj_field(_name_offset); 3546 } 3547 3548 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3549 assert(is_instance(mname), "wrong type"); 3550 mname->obj_field_put(_name_offset, name); 3551 } 3552 3553 oop java_lang_invoke_MemberName::type(oop mname) { 3554 assert(is_instance(mname), "wrong type"); 3555 return mname->obj_field(_type_offset); 3556 } 3557 3558 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3559 assert(is_instance(mname), "wrong type"); 3560 mname->obj_field_put(_type_offset, type); 3561 } 3562 3563 int java_lang_invoke_MemberName::flags(oop mname) { 3564 assert(is_instance(mname), "wrong type"); 3565 return mname->int_field(_flags_offset); 3566 } 3567 3568 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3569 assert(is_instance(mname), "wrong type"); 3570 mname->int_field_put(_flags_offset, flags); 3571 } 3572 3573 3574 // Return vmtarget from ResolvedMethodName method field through indirection 3575 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3576 assert(is_instance(mname), "wrong type"); 3577 oop method = mname->obj_field(_method_offset); 3578 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3579 } 3580 3581 bool java_lang_invoke_MemberName::is_method(oop mname) { 3582 assert(is_instance(mname), "must be MemberName"); 3583 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3584 } 3585 3586 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3587 assert(is_instance(mname), "wrong type"); 3588 mname->obj_field_put(_method_offset, resolved_method); 3589 } 3590 3591 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3592 assert(is_instance(mname), "wrong type"); 3593 return (intptr_t) mname->address_field(_vmindex_offset); 3594 } 3595 3596 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3597 assert(is_instance(mname), "wrong type"); 3598 mname->address_field_put(_vmindex_offset, (address) index); 3599 } 3600 3601 3602 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3603 assert(is_instance(resolved_method), "wrong type"); 3604 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3605 assert(m->is_method(), "must be"); 3606 return m; 3607 } 3608 3609 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3610 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3611 assert(is_instance(resolved_method), "wrong type"); 3612 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3613 } 3614 3615 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3616 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3617 oop resolved_method = ResolvedMethodTable::find_method(m()); 3618 if (resolved_method == NULL) { 3619 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3620 if (!k->is_initialized()) { 3621 k->initialize(CHECK_NULL); 3622 } 3623 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3624 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3625 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3626 // distinct loaders) to ensure the metadata is kept alive. 3627 // This mirror may be different than the one in clazz field. 3628 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3629 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method)); 3630 } 3631 return resolved_method; 3632 } 3633 3634 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3635 assert(is_instance(lform), "wrong type"); 3636 return lform->obj_field(_vmentry_offset); 3637 } 3638 3639 3640 // Support for java_lang_invoke_MethodType 3641 3642 int java_lang_invoke_MethodType::_rtype_offset; 3643 int java_lang_invoke_MethodType::_ptypes_offset; 3644 3645 #define METHODTYPE_FIELDS_DO(macro) \ 3646 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3647 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3648 3649 void java_lang_invoke_MethodType::compute_offsets() { 3650 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3651 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3652 } 3653 3654 #if INCLUDE_CDS 3655 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3656 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3657 } 3658 #endif 3659 3660 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3661 st->print("("); 3662 objArrayOop pts = ptypes(mt); 3663 for (int i = 0, limit = pts->length(); i < limit; i++) { 3664 java_lang_Class::print_signature(pts->obj_at(i), st); 3665 } 3666 st->print(")"); 3667 java_lang_Class::print_signature(rtype(mt), st); 3668 } 3669 3670 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3671 ResourceMark rm; 3672 stringStream buffer(128); 3673 print_signature(mt, &buffer); 3674 const char* sigstr = buffer.base(); 3675 int siglen = (int) buffer.size(); 3676 Symbol *name; 3677 if (!intern_if_not_found) { 3678 name = SymbolTable::probe(sigstr, siglen); 3679 } else { 3680 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3681 } 3682 return name; 3683 } 3684 3685 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3686 if (oopDesc::equals(mt1, mt2)) 3687 return true; 3688 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3689 return false; 3690 if (ptype_count(mt1) != ptype_count(mt2)) 3691 return false; 3692 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3693 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3694 return false; 3695 } 3696 return true; 3697 } 3698 3699 oop java_lang_invoke_MethodType::rtype(oop mt) { 3700 assert(is_instance(mt), "must be a MethodType"); 3701 return mt->obj_field(_rtype_offset); 3702 } 3703 3704 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3705 assert(is_instance(mt), "must be a MethodType"); 3706 return (objArrayOop) mt->obj_field(_ptypes_offset); 3707 } 3708 3709 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3710 return ptypes(mt)->obj_at(idx); 3711 } 3712 3713 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3714 return ptypes(mt)->length(); 3715 } 3716 3717 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3718 objArrayOop pts = ptypes(mt); 3719 int count = pts->length(); 3720 int slots = 0; 3721 for (int i = 0; i < count; i++) { 3722 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3723 slots += type2size[bt]; 3724 } 3725 return slots; 3726 } 3727 3728 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3729 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3730 return type2size[bt]; 3731 } 3732 3733 3734 // Support for java_lang_invoke_CallSite 3735 3736 int java_lang_invoke_CallSite::_target_offset; 3737 int java_lang_invoke_CallSite::_context_offset; 3738 3739 #define CALLSITE_FIELDS_DO(macro) \ 3740 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3741 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3742 3743 void java_lang_invoke_CallSite::compute_offsets() { 3744 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3745 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3746 } 3747 3748 #if INCLUDE_CDS 3749 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3750 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3751 } 3752 #endif 3753 3754 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3755 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3756 3757 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3758 return dep_oop; 3759 } 3760 3761 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3762 3763 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3764 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3765 3766 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3767 InstanceKlass* k = SystemDictionary::Context_klass(); 3768 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3769 } 3770 3771 #if INCLUDE_CDS 3772 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3773 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3774 } 3775 #endif 3776 3777 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3778 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3779 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3780 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3781 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3782 return dep_ctx; 3783 } 3784 3785 // Support for java_security_AccessControlContext 3786 3787 int java_security_AccessControlContext::_context_offset = 0; 3788 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3789 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3790 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3791 3792 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3793 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3794 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3795 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3796 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3797 3798 void java_security_AccessControlContext::compute_offsets() { 3799 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3800 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3801 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3802 } 3803 3804 #if INCLUDE_CDS 3805 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3806 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3807 } 3808 #endif 3809 3810 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3811 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3812 // Ensure klass is initialized 3813 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3814 // Allocate result 3815 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3816 // Fill in values 3817 result->obj_field_put(_context_offset, context()); 3818 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3819 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3820 // whitelist AccessControlContexts created by the JVM if present 3821 if (_isAuthorized_offset != -1) { 3822 result->bool_field_put(_isAuthorized_offset, true); 3823 } 3824 return result; 3825 } 3826 3827 3828 // Support for java_lang_ClassLoader 3829 3830 bool java_lang_ClassLoader::offsets_computed = false; 3831 int java_lang_ClassLoader::_loader_data_offset = -1; 3832 int java_lang_ClassLoader::parallelCapable_offset = -1; 3833 int java_lang_ClassLoader::name_offset = -1; 3834 int java_lang_ClassLoader::nameAndId_offset = -1; 3835 int java_lang_ClassLoader::unnamedModule_offset = -1; 3836 3837 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3838 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3839 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3840 } 3841 3842 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3843 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3844 return RawAccess<>::load_at(loader, _loader_data_offset); 3845 } 3846 3847 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3848 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3849 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3850 } 3851 3852 #define CLASSLOADER_FIELDS_DO(macro) \ 3853 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3854 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3855 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3856 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3857 macro(parent_offset, k1, "parent", classloader_signature, false) 3858 3859 void java_lang_ClassLoader::compute_offsets() { 3860 assert(!offsets_computed, "offsets should be initialized only once"); 3861 offsets_computed = true; 3862 3863 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3864 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3865 3866 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3867 } 3868 3869 #if INCLUDE_CDS 3870 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3871 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3872 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3873 } 3874 #endif 3875 3876 oop java_lang_ClassLoader::parent(oop loader) { 3877 assert(is_instance(loader), "loader must be oop"); 3878 return loader->obj_field(parent_offset); 3879 } 3880 3881 // Returns the name field of this class loader. If the name field has not 3882 // been set, null will be returned. 3883 oop java_lang_ClassLoader::name(oop loader) { 3884 assert(is_instance(loader), "loader must be oop"); 3885 return loader->obj_field(name_offset); 3886 } 3887 3888 // Returns the nameAndId field of this class loader. The format is 3889 // as follows: 3890 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3891 // If the defining loader has no name then <qualified-class-name> @<id> 3892 // If built-in loader, then omit '@<id>' as there is only one instance. 3893 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3894 oop java_lang_ClassLoader::nameAndId(oop loader) { 3895 assert(is_instance(loader), "loader must be oop"); 3896 return loader->obj_field(nameAndId_offset); 3897 } 3898 3899 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3900 assert(is_instance(loader), "loader must be oop"); 3901 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3902 oop acl = loader; 3903 debug_only(jint loop_count = 0); 3904 // This loop taken verbatim from ClassLoader.java: 3905 do { 3906 acl = parent(acl); 3907 if (oopDesc::equals(cl, acl)) { 3908 return true; 3909 } 3910 assert(++loop_count > 0, "loop_count overflow"); 3911 } while (acl != NULL); 3912 return false; 3913 } 3914 3915 bool java_lang_ClassLoader::is_instance(oop obj) { 3916 return obj != NULL && is_subclass(obj->klass()); 3917 } 3918 3919 3920 // For class loader classes, parallelCapable defined 3921 // based on non-null field 3922 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3923 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3924 if (parallelCapable_offset == -1) { 3925 // Default for backward compatibility is false 3926 return false; 3927 } 3928 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3929 } 3930 3931 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3932 // Fix for 4474172; see evaluation for more details 3933 loader = non_reflection_class_loader(loader); 3934 3935 oop cl = SystemDictionary::java_system_loader(); 3936 while(cl != NULL) { 3937 if (oopDesc::equals(cl, loader)) return true; 3938 cl = parent(cl); 3939 } 3940 return false; 3941 } 3942 3943 // Return true if this is one of the class loaders associated with 3944 // the generated bytecodes for reflection. 3945 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3946 if (loader != NULL) { 3947 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3948 // This might be null in non-1.4 JDKs 3949 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3950 } 3951 return false; 3952 } 3953 3954 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3955 // See whether this is one of the class loaders associated with 3956 // the generated bytecodes for reflection, and if so, "magically" 3957 // delegate to its parent to prevent class loading from occurring 3958 // in places where applications using reflection didn't expect it. 3959 if (is_reflection_class_loader(loader)) { 3960 return parent(loader); 3961 } 3962 return loader; 3963 } 3964 3965 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3966 assert(is_instance(loader), "loader must be oop"); 3967 return loader->obj_field(unnamedModule_offset); 3968 } 3969 3970 // Support for java_lang_System 3971 // 3972 #define SYSTEM_FIELDS_DO(macro) \ 3973 macro(static_in_offset, k, "in", input_stream_signature, true); \ 3974 macro(static_out_offset, k, "out", print_stream_signature, true); \ 3975 macro(static_err_offset, k, "err", print_stream_signature, true); \ 3976 macro(static_security_offset, k, "security", security_manager_signature, true) 3977 3978 void java_lang_System::compute_offsets() { 3979 InstanceKlass* k = SystemDictionary::System_klass(); 3980 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3981 } 3982 3983 #if INCLUDE_CDS 3984 void java_lang_System::serialize_offsets(SerializeClosure* f) { 3985 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3986 } 3987 #endif 3988 3989 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 3990 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 3991 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 3992 3993 int java_lang_Class::_klass_offset; 3994 int java_lang_Class::_array_klass_offset; 3995 int java_lang_Class::_oop_size_offset; 3996 int java_lang_Class::_static_oop_field_count_offset; 3997 int java_lang_Class::_class_loader_offset; 3998 int java_lang_Class::_module_offset; 3999 int java_lang_Class::_protection_domain_offset; 4000 int java_lang_Class::_component_mirror_offset; 4001 int java_lang_Class::_init_lock_offset; 4002 int java_lang_Class::_signers_offset; 4003 int java_lang_Class::_name_offset; 4004 int java_lang_Class::_source_file_offset; 4005 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4006 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4007 int java_lang_Throwable::backtrace_offset; 4008 int java_lang_Throwable::detailMessage_offset; 4009 int java_lang_Throwable::stackTrace_offset; 4010 int java_lang_Throwable::depth_offset; 4011 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4012 int java_lang_reflect_AccessibleObject::override_offset; 4013 int java_lang_reflect_Method::clazz_offset; 4014 int java_lang_reflect_Method::name_offset; 4015 int java_lang_reflect_Method::returnType_offset; 4016 int java_lang_reflect_Method::parameterTypes_offset; 4017 int java_lang_reflect_Method::exceptionTypes_offset; 4018 int java_lang_reflect_Method::slot_offset; 4019 int java_lang_reflect_Method::modifiers_offset; 4020 int java_lang_reflect_Method::signature_offset; 4021 int java_lang_reflect_Method::annotations_offset; 4022 int java_lang_reflect_Method::parameter_annotations_offset; 4023 int java_lang_reflect_Method::annotation_default_offset; 4024 int java_lang_reflect_Constructor::clazz_offset; 4025 int java_lang_reflect_Constructor::parameterTypes_offset; 4026 int java_lang_reflect_Constructor::exceptionTypes_offset; 4027 int java_lang_reflect_Constructor::slot_offset; 4028 int java_lang_reflect_Constructor::modifiers_offset; 4029 int java_lang_reflect_Constructor::signature_offset; 4030 int java_lang_reflect_Constructor::annotations_offset; 4031 int java_lang_reflect_Constructor::parameter_annotations_offset; 4032 int java_lang_reflect_Field::clazz_offset; 4033 int java_lang_reflect_Field::name_offset; 4034 int java_lang_reflect_Field::type_offset; 4035 int java_lang_reflect_Field::slot_offset; 4036 int java_lang_reflect_Field::modifiers_offset; 4037 int java_lang_reflect_Field::signature_offset; 4038 int java_lang_reflect_Field::annotations_offset; 4039 int java_lang_reflect_Parameter::name_offset; 4040 int java_lang_reflect_Parameter::modifiers_offset; 4041 int java_lang_reflect_Parameter::index_offset; 4042 int java_lang_reflect_Parameter::executable_offset; 4043 int java_lang_boxing_object::value_offset; 4044 int java_lang_boxing_object::long_value_offset; 4045 int java_lang_ref_Reference::referent_offset; 4046 int java_lang_ref_Reference::queue_offset; 4047 int java_lang_ref_Reference::next_offset; 4048 int java_lang_ref_Reference::discovered_offset; 4049 int java_lang_ref_SoftReference::timestamp_offset; 4050 int java_lang_ref_SoftReference::static_clock_offset; 4051 int java_lang_ClassLoader::parent_offset; 4052 int java_lang_System::static_in_offset; 4053 int java_lang_System::static_out_offset; 4054 int java_lang_System::static_err_offset; 4055 int java_lang_System::static_security_offset; 4056 int java_lang_StackTraceElement::methodName_offset; 4057 int java_lang_StackTraceElement::fileName_offset; 4058 int java_lang_StackTraceElement::lineNumber_offset; 4059 int java_lang_StackTraceElement::moduleName_offset; 4060 int java_lang_StackTraceElement::moduleVersion_offset; 4061 int java_lang_StackTraceElement::classLoaderName_offset; 4062 int java_lang_StackTraceElement::declaringClass_offset; 4063 int java_lang_StackTraceElement::declaringClassObject_offset; 4064 int java_lang_StackFrameInfo::_memberName_offset; 4065 int java_lang_StackFrameInfo::_bci_offset; 4066 int java_lang_StackFrameInfo::_version_offset; 4067 int java_lang_LiveStackFrameInfo::_monitors_offset; 4068 int java_lang_LiveStackFrameInfo::_locals_offset; 4069 int java_lang_LiveStackFrameInfo::_operands_offset; 4070 int java_lang_LiveStackFrameInfo::_mode_offset; 4071 int java_lang_AssertionStatusDirectives::classes_offset; 4072 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4073 int java_lang_AssertionStatusDirectives::packages_offset; 4074 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4075 int java_lang_AssertionStatusDirectives::deflt_offset; 4076 int java_nio_Buffer::_limit_offset; 4077 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4078 int reflect_ConstantPool::_oop_offset; 4079 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4080 4081 4082 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4083 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4084 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4085 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4086 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4087 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4088 macro(methodName_offset, k, "methodName", string_signature, false); \ 4089 macro(fileName_offset, k, "fileName", string_signature, false); \ 4090 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4091 4092 // Support for java_lang_StackTraceElement 4093 void java_lang_StackTraceElement::compute_offsets() { 4094 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4095 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4096 } 4097 4098 #if INCLUDE_CDS 4099 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4100 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4101 } 4102 #endif 4103 4104 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4105 element->obj_field_put(fileName_offset, value); 4106 } 4107 4108 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4109 element->obj_field_put(declaringClass_offset, value); 4110 } 4111 4112 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4113 element->obj_field_put(methodName_offset, value); 4114 } 4115 4116 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4117 element->int_field_put(lineNumber_offset, value); 4118 } 4119 4120 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4121 element->obj_field_put(moduleName_offset, value); 4122 } 4123 4124 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4125 element->obj_field_put(moduleVersion_offset, value); 4126 } 4127 4128 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4129 element->obj_field_put(classLoaderName_offset, value); 4130 } 4131 4132 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4133 element->obj_field_put(declaringClassObject_offset, value); 4134 } 4135 4136 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4137 element->short_field_put(_version_offset, value); 4138 } 4139 4140 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4141 element->int_field_put(_bci_offset, value); 4142 } 4143 4144 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4145 element->obj_field_put(_monitors_offset, value); 4146 } 4147 4148 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4149 element->obj_field_put(_locals_offset, value); 4150 } 4151 4152 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4153 element->obj_field_put(_operands_offset, value); 4154 } 4155 4156 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4157 element->int_field_put(_mode_offset, value); 4158 } 4159 4160 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4161 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4162 macro(classes_offset, k, "classes", string_array_signature, false); \ 4163 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4164 macro(packages_offset, k, "packages", string_array_signature, false); \ 4165 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4166 macro(deflt_offset, k, "deflt", bool_signature, false) 4167 4168 void java_lang_AssertionStatusDirectives::compute_offsets() { 4169 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4170 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4171 } 4172 4173 #if INCLUDE_CDS 4174 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4175 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4176 } 4177 #endif 4178 4179 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4180 o->obj_field_put(classes_offset, val); 4181 } 4182 4183 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4184 o->obj_field_put(classEnabled_offset, val); 4185 } 4186 4187 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4188 o->obj_field_put(packages_offset, val); 4189 } 4190 4191 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4192 o->obj_field_put(packageEnabled_offset, val); 4193 } 4194 4195 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4196 o->bool_field_put(deflt_offset, val); 4197 } 4198 4199 4200 // Support for intrinsification of java.nio.Buffer.checkIndex 4201 int java_nio_Buffer::limit_offset() { 4202 return _limit_offset; 4203 } 4204 4205 #define BUFFER_FIELDS_DO(macro) \ 4206 macro(_limit_offset, k, "limit", int_signature, false) 4207 4208 void java_nio_Buffer::compute_offsets() { 4209 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4210 assert(k != NULL, "must be loaded in 1.4+"); 4211 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4212 } 4213 4214 #if INCLUDE_CDS 4215 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4216 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4217 } 4218 #endif 4219 4220 #define AOS_FIELDS_DO(macro) \ 4221 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4222 4223 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4224 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4225 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4226 } 4227 4228 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4229 assert(_owner_offset != 0, "Must be initialized"); 4230 return obj->obj_field(_owner_offset); 4231 } 4232 4233 #if INCLUDE_CDS 4234 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4235 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4236 } 4237 #endif 4238 4239 static int member_offset(int hardcoded_offset) { 4240 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4241 } 4242 4243 // Compute hard-coded offsets 4244 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4245 // are not available to determine the offset_of_static_fields. 4246 void JavaClasses::compute_hard_coded_offsets() { 4247 4248 // java_lang_boxing_object 4249 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4250 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4251 4252 // java_lang_ref_Reference 4253 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4254 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4255 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4256 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4257 } 4258 4259 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4260 4261 // Compute non-hard-coded field offsets of all the classes in this file 4262 void JavaClasses::compute_offsets() { 4263 if (UseSharedSpaces) { 4264 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4265 JvmtiExport::has_early_class_hook_env()), 4266 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4267 // None of the classes used by the rest of this function can be replaced by 4268 // JMVTI ClassFileLoadHook. 4269 // We are safe to use the archived offsets, which have already been restored 4270 // by JavaClasses::serialize_offsets, without computing the offsets again. 4271 return; 4272 } 4273 4274 // We have already called the compute_offsets() of the 4275 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4276 // earlier inside SystemDictionary::resolve_well_known_classes() 4277 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4278 4279 // generated interpreter code wants to know about the offsets we just computed: 4280 AbstractAssembler::update_delayed_values(); 4281 } 4282 4283 #if INCLUDE_CDS 4284 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4285 4286 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4287 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4288 } 4289 #endif 4290 4291 4292 #ifndef PRODUCT 4293 4294 // These functions exist to assert the validity of hard-coded field offsets to guard 4295 // against changes in the class files 4296 4297 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4298 EXCEPTION_MARK; 4299 fieldDescriptor fd; 4300 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4301 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4302 InstanceKlass* ik = InstanceKlass::cast(k); 4303 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4304 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4305 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4306 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4307 return false; 4308 } 4309 if (fd.is_static()) { 4310 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4311 return false; 4312 } 4313 if (fd.offset() == hardcoded_offset ) { 4314 return true; 4315 } else { 4316 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4317 klass_name, field_name, hardcoded_offset, fd.offset()); 4318 return false; 4319 } 4320 } 4321 4322 // Check the hard-coded field offsets of all the classes in this file 4323 4324 void JavaClasses::check_offsets() { 4325 bool valid = true; 4326 4327 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4328 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4329 4330 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4331 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4332 4333 // Boxed primitive objects (java_lang_boxing_object) 4334 4335 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4336 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4337 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4338 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4339 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4340 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4341 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4342 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4343 4344 // java.lang.ref.Reference 4345 4346 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4347 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4348 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4349 // Fake field 4350 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4351 4352 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4353 } 4354 4355 #endif // PRODUCT 4356 4357 int InjectedField::compute_offset() { 4358 InstanceKlass* ik = InstanceKlass::cast(klass()); 4359 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4360 if (!may_be_java && !fs.access_flags().is_internal()) { 4361 // Only look at injected fields 4362 continue; 4363 } 4364 if (fs.name() == name() && fs.signature() == signature()) { 4365 return fs.offset(); 4366 } 4367 } 4368 ResourceMark rm; 4369 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)" : ""); 4370 #ifndef PRODUCT 4371 ik->print(); 4372 tty->print_cr("all fields:"); 4373 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4374 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4375 } 4376 #endif //PRODUCT 4377 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4378 return -1; 4379 } 4380 4381 void javaClasses_init() { 4382 JavaClasses::compute_offsets(); 4383 JavaClasses::check_offsets(); 4384 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4385 }