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(oopDesc::equals(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(oopDesc::equals(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(oopDesc::equals(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 int length1 = java_lang_String::length(str1, value1); 690 bool is_latin1 = java_lang_String::is_latin1(str1); 691 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 692 int length2 = java_lang_String::length(str2, value2); 693 bool is_latin2 = java_lang_String::is_latin1(str2); 694 695 if ((length1 != length2) || (is_latin1 != is_latin2)) { 696 // Strings of different size or with different 697 // coders are never equal. 698 return false; 699 } 700 int blength1 = value1->length(); 701 for (int i = 0; i < blength1; i++) { 702 if (value1->byte_at(i) != value2->byte_at(i)) { 703 return false; 704 } 705 } 706 return true; 707 } 708 709 void java_lang_String::print(oop java_string, outputStream* st) { 710 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 711 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 712 713 if (value == NULL) { 714 // This can happen if, e.g., printing a String 715 // object before its initializer has been called 716 st->print("NULL"); 717 return; 718 } 719 720 int length = java_lang_String::length(java_string, value); 721 bool is_latin1 = java_lang_String::is_latin1(java_string); 722 723 st->print("\""); 724 for (int index = 0; index < length; index++) { 725 st->print("%c", (!is_latin1) ? value->char_at(index) : 726 ((jchar) value->byte_at(index)) & 0xff ); 727 } 728 st->print("\""); 729 } 730 731 732 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 733 assert(mirror.not_null() && fd->is_static(), "just checking"); 734 if (fd->has_initial_value()) { 735 BasicType t = fd->field_type(); 736 switch (t) { 737 case T_BYTE: 738 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 739 break; 740 case T_BOOLEAN: 741 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 742 break; 743 case T_CHAR: 744 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 745 break; 746 case T_SHORT: 747 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 748 break; 749 case T_INT: 750 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 751 break; 752 case T_FLOAT: 753 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 754 break; 755 case T_DOUBLE: 756 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 757 break; 758 case T_LONG: 759 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 760 break; 761 case T_OBJECT: 762 { 763 assert(fd->signature() == vmSymbols::string_signature(), 764 "just checking"); 765 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 766 // Archive the String field and update the pointer. 767 oop s = mirror()->obj_field(fd->offset()); 768 oop archived_s = StringTable::create_archived_string(s, CHECK); 769 mirror()->obj_field_put(fd->offset(), archived_s); 770 } else { 771 oop string = fd->string_initial_value(CHECK); 772 mirror()->obj_field_put(fd->offset(), string); 773 } 774 } 775 break; 776 default: 777 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 778 "Illegal ConstantValue attribute in class file"); 779 } 780 } 781 } 782 783 784 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 785 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 786 787 // If the offset was read from the shared archive, it was fixed up already 788 if (!k->is_shared()) { 789 if (k->is_instance_klass()) { 790 // During bootstrap, java.lang.Class wasn't loaded so static field 791 // offsets were computed without the size added it. Go back and 792 // update all the static field offsets to included the size. 793 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 794 if (fs.access_flags().is_static()) { 795 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 796 fs.set_offset(real_offset); 797 } 798 } 799 } 800 } 801 802 if (k->is_shared() && k->has_raw_archived_mirror()) { 803 if (HeapShared::open_archive_heap_region_mapped()) { 804 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 805 assert(present, "Missing archived mirror for %s", k->external_name()); 806 return; 807 } else { 808 k->set_java_mirror_handle(NULL); 809 k->clear_has_raw_archived_mirror(); 810 } 811 } 812 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 813 } 814 815 void java_lang_Class::initialize_mirror_fields(Klass* k, 816 Handle mirror, 817 Handle protection_domain, 818 TRAPS) { 819 // Allocate a simple java object for a lock. 820 // This needs to be a java object because during class initialization 821 // it can be held across a java call. 822 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 823 set_init_lock(mirror(), r); 824 825 // Set protection domain also 826 set_protection_domain(mirror(), protection_domain()); 827 828 // Initialize static fields 829 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 830 } 831 832 // Set the java.lang.Module module field in the java_lang_Class mirror 833 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 834 if (module.is_null()) { 835 // During startup, the module may be NULL only if java.base has not been defined yet. 836 // Put the class on the fixup_module_list to patch later when the java.lang.Module 837 // for java.base is known. 838 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 839 840 bool javabase_was_defined = false; 841 { 842 MutexLocker m1(Module_lock, THREAD); 843 // Keep list of classes needing java.base module fixup 844 if (!ModuleEntryTable::javabase_defined()) { 845 assert(k->java_mirror() != NULL, "Class's mirror is null"); 846 k->class_loader_data()->inc_keep_alive(); 847 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 848 fixup_module_field_list()->push(k); 849 } else { 850 javabase_was_defined = true; 851 } 852 } 853 854 // If java.base was already defined then patch this particular class with java.base. 855 if (javabase_was_defined) { 856 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 857 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 858 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 859 Handle javabase_handle(THREAD, javabase_entry->module()); 860 set_module(mirror(), javabase_handle()); 861 } 862 } else { 863 assert(Universe::is_module_initialized() || 864 (ModuleEntryTable::javabase_defined() && 865 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 866 "Incorrect java.lang.Module specification while creating mirror"); 867 set_module(mirror(), module()); 868 } 869 } 870 871 // Statically allocate fixup lists because they always get created. 872 void java_lang_Class::allocate_fixup_lists() { 873 GrowableArray<Klass*>* mirror_list = 874 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 875 set_fixup_mirror_list(mirror_list); 876 877 GrowableArray<Klass*>* module_list = 878 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 879 set_fixup_module_field_list(module_list); 880 } 881 882 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 883 Handle module, Handle protection_domain, TRAPS) { 884 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 885 assert(k->java_mirror() == NULL, "should only assign mirror once"); 886 887 // Use this moment of initialization to cache modifier_flags also, 888 // to support Class.getModifiers(). Instance classes recalculate 889 // the cached flags after the class file is parsed, but before the 890 // class is put into the system dictionary. 891 int computed_modifiers = k->compute_modifier_flags(CHECK); 892 k->set_modifier_flags(computed_modifiers); 893 // Class_klass has to be loaded because it is used to allocate 894 // the mirror. 895 if (SystemDictionary::Class_klass_loaded()) { 896 // Allocate mirror (java.lang.Class instance) 897 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 898 Handle mirror(THREAD, mirror_oop); 899 Handle comp_mirror; 900 901 // Setup indirection from mirror->klass 902 java_lang_Class::set_klass(mirror(), k); 903 904 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 905 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 906 907 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 908 909 // It might also have a component mirror. This mirror must already exist. 910 if (k->is_array_klass()) { 911 if (k->is_typeArray_klass()) { 912 BasicType type = TypeArrayKlass::cast(k)->element_type(); 913 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 914 } else { 915 assert(k->is_objArray_klass(), "Must be"); 916 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 917 assert(element_klass != NULL, "Must have an element klass"); 918 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 919 } 920 assert(comp_mirror() != NULL, "must have a mirror"); 921 922 // Two-way link between the array klass and its component mirror: 923 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 924 set_component_mirror(mirror(), comp_mirror()); 925 // See below for ordering dependencies between field array_klass in component mirror 926 // and java_mirror in this klass. 927 } else { 928 assert(k->is_instance_klass(), "Must be"); 929 930 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 931 if (HAS_PENDING_EXCEPTION) { 932 // If any of the fields throws an exception like OOM remove the klass field 933 // from the mirror so GC doesn't follow it after the klass has been deallocated. 934 // This mirror looks like a primitive type, which logically it is because it 935 // it represents no class. 936 java_lang_Class::set_klass(mirror(), NULL); 937 return; 938 } 939 } 940 941 // set the classLoader field in the java_lang_Class instance 942 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 943 set_class_loader(mirror(), class_loader()); 944 945 // Setup indirection from klass->mirror 946 // after any exceptions can happen during allocations. 947 k->set_java_mirror(mirror); 948 949 // Set the module field in the java_lang_Class instance. This must be done 950 // after the mirror is set. 951 set_mirror_module_field(k, mirror, module, THREAD); 952 953 if (comp_mirror() != NULL) { 954 // Set after k->java_mirror() is published, because compiled code running 955 // concurrently doesn't expect a k to have a null java_mirror. 956 release_set_array_klass(comp_mirror(), k); 957 } 958 } else { 959 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 960 fixup_mirror_list()->push(k); 961 } 962 } 963 964 #if INCLUDE_CDS_JAVA_HEAP 965 // Clears mirror fields. Static final fields with initial values are reloaded 966 // from constant pool. The object identity hash is in the object header and is 967 // not affected. 968 class ResetMirrorField: public FieldClosure { 969 private: 970 Handle _m; 971 972 public: 973 ResetMirrorField(Handle mirror) : _m(mirror) {} 974 975 void do_field(fieldDescriptor* fd) { 976 assert(DumpSharedSpaces, "dump time only"); 977 assert(_m.not_null(), "Mirror cannot be NULL"); 978 979 if (fd->is_static() && fd->has_initial_value()) { 980 initialize_static_field(fd, _m, Thread::current()); 981 return; 982 } 983 984 BasicType ft = fd->field_type(); 985 switch (ft) { 986 case T_BYTE: 987 _m()->byte_field_put(fd->offset(), 0); 988 break; 989 case T_CHAR: 990 _m()->char_field_put(fd->offset(), 0); 991 break; 992 case T_DOUBLE: 993 _m()->double_field_put(fd->offset(), 0); 994 break; 995 case T_FLOAT: 996 _m()->float_field_put(fd->offset(), 0); 997 break; 998 case T_INT: 999 _m()->int_field_put(fd->offset(), 0); 1000 break; 1001 case T_LONG: 1002 _m()->long_field_put(fd->offset(), 0); 1003 break; 1004 case T_SHORT: 1005 _m()->short_field_put(fd->offset(), 0); 1006 break; 1007 case T_BOOLEAN: 1008 _m()->bool_field_put(fd->offset(), false); 1009 break; 1010 case T_ARRAY: 1011 case T_OBJECT: { 1012 // It might be useful to cache the String field, but 1013 // for now just clear out any reference field 1014 oop o = _m()->obj_field(fd->offset()); 1015 _m()->obj_field_put(fd->offset(), NULL); 1016 break; 1017 } 1018 default: 1019 ShouldNotReachHere(); 1020 break; 1021 } 1022 } 1023 }; 1024 1025 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1026 assert(HeapShared::is_heap_object_archiving_allowed(), 1027 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1028 1029 for (int t = 0; t <= T_VOID; t++) { 1030 oop m = Universe::_mirrors[t]; 1031 if (m != NULL) { 1032 // Update the field at _array_klass_offset to point to the relocated array klass. 1033 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1034 assert(archived_m != NULL, "sanity"); 1035 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1036 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1037 if (ak != NULL) { 1038 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1039 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1040 } 1041 1042 // Clear the fields. Just to be safe 1043 Klass *k = m->klass(); 1044 Handle archived_mirror_h(THREAD, archived_m); 1045 ResetMirrorField reset(archived_mirror_h); 1046 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1047 1048 log_trace(cds, heap, mirror)( 1049 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1050 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1051 1052 Universe::_mirrors[t] = archived_m; 1053 } 1054 } 1055 1056 assert(Universe::_mirrors[T_INT] != NULL && 1057 Universe::_mirrors[T_FLOAT] != NULL && 1058 Universe::_mirrors[T_DOUBLE] != NULL && 1059 Universe::_mirrors[T_BYTE] != NULL && 1060 Universe::_mirrors[T_BOOLEAN] != NULL && 1061 Universe::_mirrors[T_CHAR] != NULL && 1062 Universe::_mirrors[T_LONG] != NULL && 1063 Universe::_mirrors[T_SHORT] != NULL && 1064 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1065 1066 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1067 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1068 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1069 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1070 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1071 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1072 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1073 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1074 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1075 } 1076 1077 // 1078 // After the mirror object is successfully archived, the archived 1079 // klass is set with _has_archived_raw_mirror flag. 1080 // 1081 // The _has_archived_raw_mirror flag is cleared at runtime when the 1082 // archived mirror is restored. If archived java heap data cannot 1083 // be used at runtime, new mirror object is created for the shared 1084 // class. The _has_archived_raw_mirror is cleared also during the process. 1085 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1086 assert(HeapShared::is_heap_object_archiving_allowed(), 1087 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1088 1089 // Mirror is already archived 1090 if (k->has_raw_archived_mirror()) { 1091 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1092 return k->archived_java_mirror_raw(); 1093 } 1094 1095 // No mirror 1096 oop mirror = k->java_mirror(); 1097 if (mirror == NULL) { 1098 return NULL; 1099 } 1100 1101 if (k->is_instance_klass()) { 1102 InstanceKlass *ik = InstanceKlass::cast(k); 1103 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1104 1105 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1106 ik->is_shared_app_class())) { 1107 // Archiving mirror for classes from non-builtin loaders is not 1108 // supported. Clear the _java_mirror within the archived class. 1109 k->set_java_mirror_handle(NULL); 1110 return NULL; 1111 } 1112 } 1113 1114 // Now start archiving the mirror object 1115 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1116 if (archived_mirror == NULL) { 1117 return NULL; 1118 } 1119 1120 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1121 if (archived_mirror == NULL) { 1122 return NULL; 1123 } 1124 1125 k->set_archived_java_mirror_raw(archived_mirror); 1126 1127 k->set_has_raw_archived_mirror(); 1128 1129 ResourceMark rm; 1130 log_trace(cds, heap, mirror)( 1131 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1132 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1133 1134 return archived_mirror; 1135 } 1136 1137 // The process is based on create_mirror(). 1138 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1139 oop archived_mirror, 1140 Thread *THREAD) { 1141 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1142 // to archived metadata and objects below. 1143 Klass *c = archived_mirror->klass(); 1144 Handle archived_mirror_h(THREAD, archived_mirror); 1145 ResetMirrorField reset(archived_mirror_h); 1146 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1147 1148 if (k->is_array_klass()) { 1149 oop archived_comp_mirror; 1150 if (k->is_typeArray_klass()) { 1151 // The primitive type mirrors are already archived. Get the archived mirror. 1152 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1153 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1154 assert(archived_comp_mirror != NULL, "Must be"); 1155 } else { 1156 assert(k->is_objArray_klass(), "Must be"); 1157 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1158 assert(element_klass != NULL, "Must have an element klass"); 1159 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1160 if (archived_comp_mirror == NULL) { 1161 return NULL; 1162 } 1163 } 1164 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1165 } else { 1166 assert(k->is_instance_klass(), "Must be"); 1167 1168 // Reset local static fields in the mirror 1169 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1170 1171 java_lang_Class:set_init_lock(archived_mirror, NULL); 1172 1173 set_protection_domain(archived_mirror, NULL); 1174 } 1175 1176 // clear class loader and mirror_module_field 1177 set_class_loader(archived_mirror, NULL); 1178 set_module(archived_mirror, NULL); 1179 1180 // The archived mirror's field at _klass_offset is still pointing to the original 1181 // klass. Updated the field in the archived mirror to point to the relocated 1182 // klass in the archive. 1183 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1184 log_debug(cds, heap, mirror)( 1185 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1186 p2i(as_Klass(mirror)), p2i(reloc_k)); 1187 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1188 1189 // The field at _array_klass_offset is pointing to the original one dimension 1190 // higher array klass if exists. Relocate the pointer. 1191 Klass *arr = array_klass_acquire(mirror); 1192 if (arr != NULL) { 1193 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1194 log_debug(cds, heap, mirror)( 1195 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1196 p2i(arr), p2i(reloc_arr)); 1197 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1198 } 1199 return archived_mirror; 1200 } 1201 1202 // Returns true if the mirror is updated, false if no archived mirror 1203 // data is present. After the archived mirror object is restored, the 1204 // shared klass' _has_raw_archived_mirror flag is cleared. 1205 bool java_lang_Class::restore_archived_mirror(Klass *k, 1206 Handle class_loader, Handle module, 1207 Handle protection_domain, TRAPS) { 1208 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1209 // see more details in SystemDictionary::resolve_well_known_classes(). 1210 if (!SystemDictionary::Class_klass_loaded()) { 1211 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1212 fixup_mirror_list()->push(k); 1213 return true; 1214 } 1215 1216 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1217 1218 if (m == NULL) { 1219 return false; 1220 } 1221 1222 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1223 1224 // mirror is archived, restore 1225 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1226 Handle mirror(THREAD, m); 1227 1228 if (!k->is_array_klass()) { 1229 // - local static final fields with initial values were initialized at dump time 1230 1231 // create the init_lock 1232 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1233 set_init_lock(mirror(), r); 1234 1235 if (protection_domain.not_null()) { 1236 set_protection_domain(mirror(), protection_domain()); 1237 } 1238 } 1239 1240 assert(class_loader() == k->class_loader(), "should be same"); 1241 if (class_loader.not_null()) { 1242 set_class_loader(mirror(), class_loader()); 1243 } 1244 1245 k->set_java_mirror(mirror); 1246 k->clear_has_raw_archived_mirror(); 1247 1248 set_mirror_module_field(k, mirror, module, THREAD); 1249 1250 ResourceMark rm; 1251 log_trace(cds, heap, mirror)( 1252 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1253 1254 return true; 1255 } 1256 #endif // INCLUDE_CDS_JAVA_HEAP 1257 1258 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1259 assert(_module_offset != 0, "must have been computed already"); 1260 java_lang_Class::set_module(k->java_mirror(), module()); 1261 } 1262 1263 int java_lang_Class::oop_size(oop java_class) { 1264 assert(_oop_size_offset != 0, "must be set"); 1265 int size = java_class->int_field(_oop_size_offset); 1266 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1267 return size; 1268 } 1269 1270 1271 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1272 assert(_oop_size_offset != 0, "must be set"); 1273 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1274 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1275 } 1276 1277 int java_lang_Class::static_oop_field_count(oop java_class) { 1278 assert(_static_oop_field_count_offset != 0, "must be set"); 1279 return java_class->int_field(_static_oop_field_count_offset); 1280 } 1281 1282 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1283 assert(_static_oop_field_count_offset != 0, "must be set"); 1284 return java_class->int_field_raw(_static_oop_field_count_offset); 1285 } 1286 1287 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1288 assert(_static_oop_field_count_offset != 0, "must be set"); 1289 java_class->int_field_put(_static_oop_field_count_offset, size); 1290 } 1291 1292 oop java_lang_Class::protection_domain(oop java_class) { 1293 assert(_protection_domain_offset != 0, "must be set"); 1294 return java_class->obj_field(_protection_domain_offset); 1295 } 1296 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1297 assert(_protection_domain_offset != 0, "must be set"); 1298 java_class->obj_field_put(_protection_domain_offset, pd); 1299 } 1300 1301 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1302 assert(_component_mirror_offset != 0, "must be set"); 1303 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1304 } 1305 oop java_lang_Class::component_mirror(oop java_class) { 1306 assert(_component_mirror_offset != 0, "must be set"); 1307 return java_class->obj_field(_component_mirror_offset); 1308 } 1309 1310 oop java_lang_Class::init_lock(oop java_class) { 1311 assert(_init_lock_offset != 0, "must be set"); 1312 return java_class->obj_field(_init_lock_offset); 1313 } 1314 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1315 assert(_init_lock_offset != 0, "must be set"); 1316 java_class->obj_field_put(_init_lock_offset, init_lock); 1317 } 1318 1319 objArrayOop java_lang_Class::signers(oop java_class) { 1320 assert(_signers_offset != 0, "must be set"); 1321 return (objArrayOop)java_class->obj_field(_signers_offset); 1322 } 1323 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1324 assert(_signers_offset != 0, "must be set"); 1325 java_class->obj_field_put(_signers_offset, (oop)signers); 1326 } 1327 1328 1329 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1330 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1331 if (_class_loader_offset != 0) { 1332 java_class->obj_field_put(_class_loader_offset, loader); 1333 } 1334 } 1335 1336 oop java_lang_Class::class_loader(oop java_class) { 1337 assert(_class_loader_offset != 0, "must be set"); 1338 return java_class->obj_field(_class_loader_offset); 1339 } 1340 1341 oop java_lang_Class::module(oop java_class) { 1342 assert(_module_offset != 0, "must be set"); 1343 return java_class->obj_field(_module_offset); 1344 } 1345 1346 void java_lang_Class::set_module(oop java_class, oop module) { 1347 assert(_module_offset != 0, "must be set"); 1348 java_class->obj_field_put(_module_offset, module); 1349 } 1350 1351 oop java_lang_Class::name(Handle java_class, TRAPS) { 1352 assert(_name_offset != 0, "must be set"); 1353 oop o = java_class->obj_field(_name_offset); 1354 if (o == NULL) { 1355 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1356 java_class->obj_field_put(_name_offset, o); 1357 } 1358 return o; 1359 } 1360 1361 oop java_lang_Class::source_file(oop java_class) { 1362 assert(_source_file_offset != 0, "must be set"); 1363 return java_class->obj_field(_source_file_offset); 1364 } 1365 1366 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1367 assert(_source_file_offset != 0, "must be set"); 1368 java_class->obj_field_put(_source_file_offset, source_file); 1369 } 1370 1371 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1372 // This should be improved by adding a field at the Java level or by 1373 // introducing a new VM klass (see comment in ClassFileParser) 1374 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1375 if (type != T_VOID) { 1376 Klass* aklass = Universe::typeArrayKlassObj(type); 1377 assert(aklass != NULL, "correct bootstrap"); 1378 release_set_array_klass(java_class, aklass); 1379 } 1380 #ifdef ASSERT 1381 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1382 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1383 #endif 1384 return java_class; 1385 } 1386 1387 1388 Klass* java_lang_Class::as_Klass(oop java_class) { 1389 //%note memory_2 1390 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1391 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1392 assert(k == NULL || k->is_klass(), "type check"); 1393 return k; 1394 } 1395 1396 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1397 //%note memory_2 1398 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1399 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1400 assert(k == NULL || k->is_klass(), "type check"); 1401 return k; 1402 } 1403 1404 1405 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1406 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1407 java_class->metadata_field_put(_klass_offset, klass); 1408 } 1409 1410 1411 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1413 Symbol* name = NULL; 1414 bool is_instance = false; 1415 if (is_primitive(java_class)) { 1416 name = vmSymbols::type_signature(primitive_type(java_class)); 1417 } else { 1418 Klass* k = as_Klass(java_class); 1419 is_instance = k->is_instance_klass(); 1420 name = k->name(); 1421 } 1422 if (name == NULL) { 1423 st->print("<null>"); 1424 return; 1425 } 1426 if (is_instance) st->print("L"); 1427 st->write((char*) name->base(), (int) name->utf8_length()); 1428 if (is_instance) st->print(";"); 1429 } 1430 1431 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1433 Symbol* name; 1434 if (is_primitive(java_class)) { 1435 name = vmSymbols::type_signature(primitive_type(java_class)); 1436 // Because this can create a new symbol, the caller has to decrement 1437 // the refcount, so make adjustment here and below for symbols returned 1438 // that are not created or incremented due to a successful lookup. 1439 name->increment_refcount(); 1440 } else { 1441 Klass* k = as_Klass(java_class); 1442 if (!k->is_instance_klass()) { 1443 name = k->name(); 1444 name->increment_refcount(); 1445 } else { 1446 ResourceMark rm; 1447 const char* sigstr = k->signature_name(); 1448 int siglen = (int) strlen(sigstr); 1449 if (!intern_if_not_found) { 1450 name = SymbolTable::probe(sigstr, siglen); 1451 } else { 1452 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1453 } 1454 } 1455 } 1456 return name; 1457 } 1458 1459 // Returns the Java name for this Java mirror (Resource allocated) 1460 // See Klass::external_name(). 1461 // For primitive type Java mirrors, its type name is returned. 1462 const char* java_lang_Class::as_external_name(oop java_class) { 1463 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1464 const char* name = NULL; 1465 if (is_primitive(java_class)) { 1466 name = type2name(primitive_type(java_class)); 1467 } else { 1468 name = as_Klass(java_class)->external_name(); 1469 } 1470 if (name == NULL) { 1471 name = "<null>"; 1472 } 1473 return name; 1474 } 1475 1476 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1477 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1478 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1479 return k; 1480 } 1481 1482 1483 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1484 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1485 java_class->release_metadata_field_put(_array_klass_offset, klass); 1486 } 1487 1488 1489 BasicType java_lang_Class::primitive_type(oop java_class) { 1490 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1491 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1492 BasicType type = T_VOID; 1493 if (ak != NULL) { 1494 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1495 type = ArrayKlass::cast(ak)->element_type(); 1496 } else { 1497 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1498 } 1499 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1500 return type; 1501 } 1502 1503 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1504 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1505 if (is_primitive(java_class)) { 1506 if (reference_klass != NULL) 1507 (*reference_klass) = NULL; 1508 return primitive_type(java_class); 1509 } else { 1510 if (reference_klass != NULL) 1511 (*reference_klass) = as_Klass(java_class); 1512 return T_OBJECT; 1513 } 1514 } 1515 1516 1517 oop java_lang_Class::primitive_mirror(BasicType t) { 1518 oop mirror = Universe::java_mirror(t); 1519 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1520 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1521 return mirror; 1522 } 1523 1524 bool java_lang_Class::offsets_computed = false; 1525 int java_lang_Class::classRedefinedCount_offset = -1; 1526 1527 #define CLASS_FIELDS_DO(macro) \ 1528 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1529 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1530 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1531 macro(_module_offset, k, "module", module_signature, false); \ 1532 macro(_name_offset, k, "name", string_signature, false); \ 1533 1534 void java_lang_Class::compute_offsets() { 1535 if (offsets_computed) { 1536 return; 1537 } 1538 1539 offsets_computed = true; 1540 1541 InstanceKlass* k = SystemDictionary::Class_klass(); 1542 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1543 1544 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1545 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1546 // GC treats them the same. 1547 _init_lock_offset = _component_mirror_offset; 1548 1549 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1550 } 1551 1552 #if INCLUDE_CDS 1553 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1554 f->do_u4((u4*)&offsets_computed); 1555 f->do_u4((u4*)&_init_lock_offset); 1556 1557 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1558 1559 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1560 } 1561 #endif 1562 1563 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1564 if (classRedefinedCount_offset == -1) { 1565 // If we don't have an offset for it then just return -1 as a marker. 1566 return -1; 1567 } 1568 1569 return the_class_mirror->int_field(classRedefinedCount_offset); 1570 } 1571 1572 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1573 if (classRedefinedCount_offset == -1) { 1574 // If we don't have an offset for it then nothing to set. 1575 return; 1576 } 1577 1578 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1579 } 1580 1581 1582 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1583 // platform thread structure, and a eetop offset which was used for thread 1584 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1585 // merged, so in the HotSpot VM we just use the eetop field for the thread 1586 // instead of the privateInfo_offset. 1587 // 1588 // Note: The stackSize field is only present starting in 1.4. 1589 1590 int java_lang_Thread::_name_offset = 0; 1591 int java_lang_Thread::_group_offset = 0; 1592 int java_lang_Thread::_contextClassLoader_offset = 0; 1593 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1594 int java_lang_Thread::_priority_offset = 0; 1595 int java_lang_Thread::_eetop_offset = 0; 1596 int java_lang_Thread::_daemon_offset = 0; 1597 int java_lang_Thread::_stillborn_offset = 0; 1598 int java_lang_Thread::_stackSize_offset = 0; 1599 int java_lang_Thread::_tid_offset = 0; 1600 int java_lang_Thread::_thread_status_offset = 0; 1601 int java_lang_Thread::_park_blocker_offset = 0; 1602 int java_lang_Thread::_park_event_offset = 0 ; 1603 1604 #define THREAD_FIELDS_DO(macro) \ 1605 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1606 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1607 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1608 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1609 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1610 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1611 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1612 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1613 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1614 macro(_tid_offset, k, "tid", long_signature, false); \ 1615 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1616 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1617 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1618 1619 void java_lang_Thread::compute_offsets() { 1620 assert(_group_offset == 0, "offsets should be initialized only once"); 1621 1622 InstanceKlass* k = SystemDictionary::Thread_klass(); 1623 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1624 } 1625 1626 #if INCLUDE_CDS 1627 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1628 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1629 } 1630 #endif 1631 1632 JavaThread* java_lang_Thread::thread(oop java_thread) { 1633 return (JavaThread*)java_thread->address_field(_eetop_offset); 1634 } 1635 1636 1637 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1638 java_thread->address_field_put(_eetop_offset, (address)thread); 1639 } 1640 1641 1642 oop java_lang_Thread::name(oop java_thread) { 1643 return java_thread->obj_field(_name_offset); 1644 } 1645 1646 1647 void java_lang_Thread::set_name(oop java_thread, oop name) { 1648 java_thread->obj_field_put(_name_offset, name); 1649 } 1650 1651 1652 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1653 return (ThreadPriority)java_thread->int_field(_priority_offset); 1654 } 1655 1656 1657 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1658 java_thread->int_field_put(_priority_offset, priority); 1659 } 1660 1661 1662 oop java_lang_Thread::threadGroup(oop java_thread) { 1663 return java_thread->obj_field(_group_offset); 1664 } 1665 1666 1667 bool java_lang_Thread::is_stillborn(oop java_thread) { 1668 return java_thread->bool_field(_stillborn_offset) != 0; 1669 } 1670 1671 1672 // We never have reason to turn the stillborn bit off 1673 void java_lang_Thread::set_stillborn(oop java_thread) { 1674 java_thread->bool_field_put(_stillborn_offset, true); 1675 } 1676 1677 1678 bool java_lang_Thread::is_alive(oop java_thread) { 1679 JavaThread* thr = java_lang_Thread::thread(java_thread); 1680 return (thr != NULL); 1681 } 1682 1683 1684 bool java_lang_Thread::is_daemon(oop java_thread) { 1685 return java_thread->bool_field(_daemon_offset) != 0; 1686 } 1687 1688 1689 void java_lang_Thread::set_daemon(oop java_thread) { 1690 java_thread->bool_field_put(_daemon_offset, true); 1691 } 1692 1693 oop java_lang_Thread::context_class_loader(oop java_thread) { 1694 return java_thread->obj_field(_contextClassLoader_offset); 1695 } 1696 1697 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1698 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1699 } 1700 1701 1702 jlong java_lang_Thread::stackSize(oop java_thread) { 1703 if (_stackSize_offset > 0) { 1704 return java_thread->long_field(_stackSize_offset); 1705 } else { 1706 return 0; 1707 } 1708 } 1709 1710 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1711 void java_lang_Thread::set_thread_status(oop java_thread, 1712 java_lang_Thread::ThreadStatus status) { 1713 // The threadStatus is only present starting in 1.5 1714 if (_thread_status_offset > 0) { 1715 java_thread->int_field_put(_thread_status_offset, status); 1716 } 1717 } 1718 1719 // Read thread status value from threadStatus field in java.lang.Thread java class. 1720 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1721 // Make sure the caller is operating on behalf of the VM or is 1722 // running VM code (state == _thread_in_vm). 1723 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1724 JavaThread::current()->thread_state() == _thread_in_vm, 1725 "Java Thread is not running in vm"); 1726 // The threadStatus is only present starting in 1.5 1727 if (_thread_status_offset > 0) { 1728 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1729 } else { 1730 // All we can easily figure out is if it is alive, but that is 1731 // enough info for a valid unknown status. 1732 // These aren't restricted to valid set ThreadStatus values, so 1733 // use JVMTI values and cast. 1734 JavaThread* thr = java_lang_Thread::thread(java_thread); 1735 if (thr == NULL) { 1736 // the thread hasn't run yet or is in the process of exiting 1737 return NEW; 1738 } 1739 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1740 } 1741 } 1742 1743 1744 jlong java_lang_Thread::thread_id(oop java_thread) { 1745 // The thread ID field is only present starting in 1.5 1746 if (_tid_offset > 0) { 1747 return java_thread->long_field(_tid_offset); 1748 } else { 1749 return 0; 1750 } 1751 } 1752 1753 oop java_lang_Thread::park_blocker(oop java_thread) { 1754 assert(JDK_Version::current().supports_thread_park_blocker() && 1755 _park_blocker_offset != 0, "Must support parkBlocker field"); 1756 1757 if (_park_blocker_offset > 0) { 1758 return java_thread->obj_field(_park_blocker_offset); 1759 } 1760 1761 return NULL; 1762 } 1763 1764 jlong java_lang_Thread::park_event(oop java_thread) { 1765 if (_park_event_offset > 0) { 1766 return java_thread->long_field(_park_event_offset); 1767 } 1768 return 0; 1769 } 1770 1771 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1772 if (_park_event_offset > 0) { 1773 java_thread->long_field_put(_park_event_offset, ptr); 1774 return true; 1775 } 1776 return false; 1777 } 1778 1779 1780 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1781 assert(_thread_status_offset != 0, "Must have thread status"); 1782 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1783 switch (status) { 1784 case NEW : return "NEW"; 1785 case RUNNABLE : return "RUNNABLE"; 1786 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1787 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1788 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1789 case PARKED : return "WAITING (parking)"; 1790 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1791 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1792 case TERMINATED : return "TERMINATED"; 1793 default : return "UNKNOWN"; 1794 }; 1795 } 1796 int java_lang_ThreadGroup::_parent_offset = 0; 1797 int java_lang_ThreadGroup::_name_offset = 0; 1798 int java_lang_ThreadGroup::_threads_offset = 0; 1799 int java_lang_ThreadGroup::_groups_offset = 0; 1800 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1801 int java_lang_ThreadGroup::_destroyed_offset = 0; 1802 int java_lang_ThreadGroup::_daemon_offset = 0; 1803 int java_lang_ThreadGroup::_nthreads_offset = 0; 1804 int java_lang_ThreadGroup::_ngroups_offset = 0; 1805 1806 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1807 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1808 return java_thread_group->obj_field(_parent_offset); 1809 } 1810 1811 // ("name as oop" accessor is not necessary) 1812 1813 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1814 oop name = java_thread_group->obj_field(_name_offset); 1815 // ThreadGroup.name can be null 1816 if (name != NULL) { 1817 return java_lang_String::as_utf8_string(name); 1818 } 1819 return NULL; 1820 } 1821 1822 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1823 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1824 return java_thread_group->int_field(_nthreads_offset); 1825 } 1826 1827 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1828 oop threads = java_thread_group->obj_field(_threads_offset); 1829 assert(threads != NULL, "threadgroups should have threads"); 1830 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1831 return objArrayOop(threads); 1832 } 1833 1834 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1835 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1836 return java_thread_group->int_field(_ngroups_offset); 1837 } 1838 1839 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1840 oop groups = java_thread_group->obj_field(_groups_offset); 1841 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1842 return objArrayOop(groups); 1843 } 1844 1845 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1846 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1847 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1848 } 1849 1850 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1851 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1852 return java_thread_group->bool_field(_destroyed_offset) != 0; 1853 } 1854 1855 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1856 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1857 return java_thread_group->bool_field(_daemon_offset) != 0; 1858 } 1859 1860 #define THREADGROUP_FIELDS_DO(macro) \ 1861 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1862 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1863 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1864 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1865 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1866 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1867 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1868 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1869 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1870 1871 void java_lang_ThreadGroup::compute_offsets() { 1872 assert(_parent_offset == 0, "offsets should be initialized only once"); 1873 1874 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1875 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1876 } 1877 1878 #if INCLUDE_CDS 1879 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1880 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1881 } 1882 #endif 1883 1884 #define THROWABLE_FIELDS_DO(macro) \ 1885 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1886 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1887 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1888 macro(depth_offset, k, "depth", int_signature, false); \ 1889 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1890 1891 void java_lang_Throwable::compute_offsets() { 1892 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1893 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1894 } 1895 1896 #if INCLUDE_CDS 1897 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1898 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1899 } 1900 #endif 1901 1902 oop java_lang_Throwable::unassigned_stacktrace() { 1903 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1904 oop base = ik->static_field_base_raw(); 1905 return base->obj_field(static_unassigned_stacktrace_offset); 1906 } 1907 1908 oop java_lang_Throwable::backtrace(oop throwable) { 1909 return throwable->obj_field_acquire(backtrace_offset); 1910 } 1911 1912 1913 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1914 throwable->release_obj_field_put(backtrace_offset, value); 1915 } 1916 1917 int java_lang_Throwable::depth(oop throwable) { 1918 return throwable->int_field(depth_offset); 1919 } 1920 1921 void java_lang_Throwable::set_depth(oop throwable, int value) { 1922 throwable->int_field_put(depth_offset, value); 1923 } 1924 1925 oop java_lang_Throwable::message(oop throwable) { 1926 return throwable->obj_field(detailMessage_offset); 1927 } 1928 1929 1930 // Return Symbol for detailed_message or NULL 1931 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1932 PRESERVE_EXCEPTION_MARK; // Keep original exception 1933 oop detailed_message = java_lang_Throwable::message(throwable); 1934 if (detailed_message != NULL) { 1935 return java_lang_String::as_symbol(detailed_message, THREAD); 1936 } 1937 return NULL; 1938 } 1939 1940 void java_lang_Throwable::set_message(oop throwable, oop value) { 1941 throwable->obj_field_put(detailMessage_offset, value); 1942 } 1943 1944 1945 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1946 throwable->obj_field_put(stackTrace_offset, st_element_array); 1947 } 1948 1949 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1950 set_stacktrace(throwable, NULL); 1951 } 1952 1953 1954 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1955 ResourceMark rm; 1956 Klass* k = throwable->klass(); 1957 assert(k != NULL, "just checking"); 1958 st->print("%s", k->external_name()); 1959 oop msg = message(throwable); 1960 if (msg != NULL) { 1961 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1962 } 1963 } 1964 1965 // After this many redefines, the stack trace is unreliable. 1966 const int MAX_VERSION = USHRT_MAX; 1967 1968 static inline bool version_matches(Method* method, int version) { 1969 assert(version < MAX_VERSION, "version is too big"); 1970 return method != NULL && (method->constants()->version() == version); 1971 } 1972 1973 1974 // This class provides a simple wrapper over the internal structure of 1975 // exception backtrace to insulate users of the backtrace from needing 1976 // to know what it looks like. 1977 class BacktraceBuilder: public StackObj { 1978 friend class BacktraceIterator; 1979 private: 1980 Handle _backtrace; 1981 objArrayOop _head; 1982 typeArrayOop _methods; 1983 typeArrayOop _bcis; 1984 objArrayOop _mirrors; 1985 typeArrayOop _names; // needed to insulate method name against redefinition 1986 int _index; 1987 NoSafepointVerifier _nsv; 1988 1989 enum { 1990 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1991 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1992 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1993 trace_names_offset = java_lang_Throwable::trace_names_offset, 1994 trace_next_offset = java_lang_Throwable::trace_next_offset, 1995 trace_size = java_lang_Throwable::trace_size, 1996 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1997 }; 1998 1999 // get info out of chunks 2000 static typeArrayOop get_methods(objArrayHandle chunk) { 2001 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2002 assert(methods != NULL, "method array should be initialized in backtrace"); 2003 return methods; 2004 } 2005 static typeArrayOop get_bcis(objArrayHandle chunk) { 2006 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2007 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2008 return bcis; 2009 } 2010 static objArrayOop get_mirrors(objArrayHandle chunk) { 2011 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2012 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2013 return mirrors; 2014 } 2015 static typeArrayOop get_names(objArrayHandle chunk) { 2016 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2017 assert(names != NULL, "names array should be initialized in backtrace"); 2018 return names; 2019 } 2020 2021 public: 2022 2023 // constructor for new backtrace 2024 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2025 expand(CHECK); 2026 _backtrace = Handle(THREAD, _head); 2027 _index = 0; 2028 } 2029 2030 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2031 _methods = get_methods(backtrace); 2032 _bcis = get_bcis(backtrace); 2033 _mirrors = get_mirrors(backtrace); 2034 _names = get_names(backtrace); 2035 assert(_methods->length() == _bcis->length() && 2036 _methods->length() == _mirrors->length() && 2037 _mirrors->length() == _names->length(), 2038 "method and source information arrays should match"); 2039 2040 // head is the preallocated backtrace 2041 _head = backtrace(); 2042 _backtrace = Handle(thread, _head); 2043 _index = 0; 2044 } 2045 2046 void expand(TRAPS) { 2047 objArrayHandle old_head(THREAD, _head); 2048 PauseNoSafepointVerifier pnsv(&_nsv); 2049 2050 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2051 objArrayHandle new_head(THREAD, head); 2052 2053 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2054 typeArrayHandle new_methods(THREAD, methods); 2055 2056 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2057 typeArrayHandle new_bcis(THREAD, bcis); 2058 2059 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2060 objArrayHandle new_mirrors(THREAD, mirrors); 2061 2062 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2063 typeArrayHandle new_names(THREAD, names); 2064 2065 if (!old_head.is_null()) { 2066 old_head->obj_at_put(trace_next_offset, new_head()); 2067 } 2068 new_head->obj_at_put(trace_methods_offset, new_methods()); 2069 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2070 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2071 new_head->obj_at_put(trace_names_offset, new_names()); 2072 2073 _head = new_head(); 2074 _methods = new_methods(); 2075 _bcis = new_bcis(); 2076 _mirrors = new_mirrors(); 2077 _names = new_names(); 2078 _index = 0; 2079 } 2080 2081 oop backtrace() { 2082 return _backtrace(); 2083 } 2084 2085 inline void push(Method* method, int bci, TRAPS) { 2086 // Smear the -1 bci to 0 since the array only holds unsigned 2087 // shorts. The later line number lookup would just smear the -1 2088 // to a 0 even if it could be recorded. 2089 if (bci == SynchronizationEntryBCI) bci = 0; 2090 2091 if (_index >= trace_chunk_size) { 2092 methodHandle mhandle(THREAD, method); 2093 expand(CHECK); 2094 method = mhandle(); 2095 } 2096 2097 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2098 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2099 2100 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2101 // klass owning the symbols alive so their refcounts aren't decremented. 2102 Symbol* name = method->name(); 2103 _names->symbol_at_put(_index, name); 2104 2105 // We need to save the mirrors in the backtrace to keep the class 2106 // from being unloaded while we still have this stack trace. 2107 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2108 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2109 _index++; 2110 } 2111 2112 }; 2113 2114 struct BacktraceElement : public StackObj { 2115 int _method_id; 2116 int _bci; 2117 int _version; 2118 Symbol* _name; 2119 Handle _mirror; 2120 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2121 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2122 }; 2123 2124 class BacktraceIterator : public StackObj { 2125 int _index; 2126 objArrayHandle _result; 2127 objArrayHandle _mirrors; 2128 typeArrayHandle _methods; 2129 typeArrayHandle _bcis; 2130 typeArrayHandle _names; 2131 2132 void init(objArrayHandle result, Thread* thread) { 2133 // Get method id, bci, version and mirror from chunk 2134 _result = result; 2135 if (_result.not_null()) { 2136 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2137 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2138 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2139 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2140 _index = 0; 2141 } 2142 } 2143 public: 2144 BacktraceIterator(objArrayHandle result, Thread* thread) { 2145 init(result, thread); 2146 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2147 } 2148 2149 BacktraceElement next(Thread* thread) { 2150 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2151 _methods->ushort_at(_index), 2152 Backtrace::version_at(_bcis->int_at(_index)), 2153 Backtrace::bci_at(_bcis->int_at(_index)), 2154 _names->symbol_at(_index)); 2155 _index++; 2156 2157 if (_index >= java_lang_Throwable::trace_chunk_size) { 2158 int next_offset = java_lang_Throwable::trace_next_offset; 2159 // Get next chunk 2160 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2161 init(result, thread); 2162 } 2163 return e; 2164 } 2165 2166 bool repeat() { 2167 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2168 } 2169 }; 2170 2171 2172 // Print stack trace element to resource allocated buffer 2173 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2174 int version, int bci, Symbol* name) { 2175 ResourceMark rm; 2176 2177 // Get strings and string lengths 2178 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2179 const char* klass_name = holder->external_name(); 2180 int buf_len = (int)strlen(klass_name); 2181 2182 char* method_name = name->as_C_string(); 2183 buf_len += (int)strlen(method_name); 2184 2185 char* source_file_name = NULL; 2186 Symbol* source = Backtrace::get_source_file_name(holder, version); 2187 if (source != NULL) { 2188 source_file_name = source->as_C_string(); 2189 buf_len += (int)strlen(source_file_name); 2190 } 2191 2192 char *module_name = NULL, *module_version = NULL; 2193 ModuleEntry* module = holder->module(); 2194 if (module->is_named()) { 2195 module_name = module->name()->as_C_string(); 2196 buf_len += (int)strlen(module_name); 2197 if (module->version() != NULL) { 2198 module_version = module->version()->as_C_string(); 2199 buf_len += (int)strlen(module_version); 2200 } 2201 } 2202 2203 // Allocate temporary buffer with extra space for formatting and line number 2204 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2205 2206 // Print stack trace line in buffer 2207 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2208 2209 // Print module information 2210 if (module_name != NULL) { 2211 if (module_version != NULL) { 2212 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2213 } else { 2214 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2215 } 2216 } 2217 2218 // The method can be NULL if the requested class version is gone 2219 Method* method = holder->method_with_orig_idnum(method_id, version); 2220 if (!version_matches(method, version)) { 2221 strcat(buf, "Redefined)"); 2222 } else { 2223 int line_number = Backtrace::get_line_number(method, bci); 2224 if (line_number == -2) { 2225 strcat(buf, "Native Method)"); 2226 } else { 2227 if (source_file_name != NULL && (line_number != -1)) { 2228 // Sourcename and linenumber 2229 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2230 } else if (source_file_name != NULL) { 2231 // Just sourcename 2232 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2233 } else { 2234 // Neither sourcename nor linenumber 2235 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2236 } 2237 CompiledMethod* nm = method->code(); 2238 if (WizardMode && nm != NULL) { 2239 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2240 } 2241 } 2242 } 2243 2244 st->print_cr("%s", buf); 2245 } 2246 2247 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2248 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2249 int method_id = method->orig_method_idnum(); 2250 int version = method->constants()->version(); 2251 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2252 } 2253 2254 /** 2255 * Print the throwable message and its stack trace plus all causes by walking the 2256 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2257 */ 2258 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2259 // First, print the message. 2260 print(throwable(), st); 2261 st->cr(); 2262 2263 // Now print the stack trace. 2264 Thread* THREAD = Thread::current(); 2265 while (throwable.not_null()) { 2266 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2267 if (result.is_null()) { 2268 st->print_raw_cr("\t<<no stack trace available>>"); 2269 return; 2270 } 2271 BacktraceIterator iter(result, THREAD); 2272 2273 while (iter.repeat()) { 2274 BacktraceElement bte = iter.next(THREAD); 2275 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2276 } 2277 { 2278 // Call getCause() which doesn't necessarily return the _cause field. 2279 EXCEPTION_MARK; 2280 JavaValue cause(T_OBJECT); 2281 JavaCalls::call_virtual(&cause, 2282 throwable, 2283 throwable->klass(), 2284 vmSymbols::getCause_name(), 2285 vmSymbols::void_throwable_signature(), 2286 THREAD); 2287 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2288 if (HAS_PENDING_EXCEPTION) { 2289 CLEAR_PENDING_EXCEPTION; 2290 throwable = Handle(); 2291 } else { 2292 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2293 if (throwable.not_null()) { 2294 st->print("Caused by: "); 2295 print(throwable(), st); 2296 st->cr(); 2297 } 2298 } 2299 } 2300 } 2301 } 2302 2303 /** 2304 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2305 */ 2306 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2307 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2308 JavaValue result(T_VOID); 2309 JavaCalls::call_virtual(&result, 2310 throwable, 2311 SystemDictionary::Throwable_klass(), 2312 vmSymbols::printStackTrace_name(), 2313 vmSymbols::void_method_signature(), 2314 THREAD); 2315 } 2316 2317 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2318 if (!StackTraceInThrowable) return; 2319 ResourceMark rm(THREAD); 2320 2321 // Start out by clearing the backtrace for this object, in case the VM 2322 // runs out of memory while allocating the stack trace 2323 set_backtrace(throwable(), NULL); 2324 // Clear lazily constructed Java level stacktrace if refilling occurs 2325 // This is unnecessary in 1.7+ but harmless 2326 clear_stacktrace(throwable()); 2327 2328 int max_depth = MaxJavaStackTraceDepth; 2329 JavaThread* thread = (JavaThread*)THREAD; 2330 2331 BacktraceBuilder bt(CHECK); 2332 2333 // If there is no Java frame just return the method that was being called 2334 // with bci 0 2335 if (!thread->has_last_Java_frame()) { 2336 if (max_depth >= 1 && method() != NULL) { 2337 bt.push(method(), 0, CHECK); 2338 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2339 set_depth(throwable(), 1); 2340 set_backtrace(throwable(), bt.backtrace()); 2341 } 2342 return; 2343 } 2344 2345 // Instead of using vframe directly, this version of fill_in_stack_trace 2346 // basically handles everything by hand. This significantly improved the 2347 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2348 // See bug 6333838 for more details. 2349 // The "ASSERT" here is to verify this method generates the exactly same stack 2350 // trace as utilizing vframe. 2351 #ifdef ASSERT 2352 vframeStream st(thread); 2353 methodHandle st_method(THREAD, st.method()); 2354 #endif 2355 int total_count = 0; 2356 RegisterMap map(thread, false); 2357 int decode_offset = 0; 2358 CompiledMethod* nm = NULL; 2359 bool skip_fillInStackTrace_check = false; 2360 bool skip_throwableInit_check = false; 2361 bool skip_hidden = !ShowHiddenFrames; 2362 2363 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2364 Method* method = NULL; 2365 int bci = 0; 2366 2367 // Compiled java method case. 2368 if (decode_offset != 0) { 2369 DebugInfoReadStream stream(nm, decode_offset); 2370 decode_offset = stream.read_int(); 2371 method = (Method*)nm->metadata_at(stream.read_int()); 2372 bci = stream.read_bci(); 2373 } else { 2374 if (fr.is_first_frame()) break; 2375 address pc = fr.pc(); 2376 if (fr.is_interpreted_frame()) { 2377 address bcp = fr.interpreter_frame_bcp(); 2378 method = fr.interpreter_frame_method(); 2379 bci = method->bci_from(bcp); 2380 fr = fr.sender(&map); 2381 } else { 2382 CodeBlob* cb = fr.cb(); 2383 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2384 // but non nmethod 2385 fr = fr.sender(&map); 2386 if (cb == NULL || !cb->is_compiled()) { 2387 continue; 2388 } 2389 nm = cb->as_compiled_method(); 2390 if (nm->method()->is_native()) { 2391 method = nm->method(); 2392 bci = 0; 2393 } else { 2394 PcDesc* pd = nm->pc_desc_at(pc); 2395 decode_offset = pd->scope_decode_offset(); 2396 // if decode_offset is not equal to 0, it will execute the 2397 // "compiled java method case" at the beginning of the loop. 2398 continue; 2399 } 2400 } 2401 } 2402 #ifdef ASSERT 2403 assert(st_method() == method && st.bci() == bci, 2404 "Wrong stack trace"); 2405 st.next(); 2406 // vframeStream::method isn't GC-safe so store off a copy 2407 // of the Method* in case we GC. 2408 if (!st.at_end()) { 2409 st_method = st.method(); 2410 } 2411 #endif 2412 2413 // the format of the stacktrace will be: 2414 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2415 // - 0 or more <init> methods for the exception class (skipped) 2416 // - rest of the stack 2417 2418 if (!skip_fillInStackTrace_check) { 2419 if (method->name() == vmSymbols::fillInStackTrace_name() && 2420 throwable->is_a(method->method_holder())) { 2421 continue; 2422 } 2423 else { 2424 skip_fillInStackTrace_check = true; // gone past them all 2425 } 2426 } 2427 if (!skip_throwableInit_check) { 2428 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2429 2430 // skip <init> methods of the exception class and superclasses 2431 // This is simlar to classic VM. 2432 if (method->name() == vmSymbols::object_initializer_name() && 2433 throwable->is_a(method->method_holder())) { 2434 continue; 2435 } else { 2436 // there are none or we've seen them all - either way stop checking 2437 skip_throwableInit_check = true; 2438 } 2439 } 2440 if (method->is_hidden()) { 2441 if (skip_hidden) continue; 2442 } 2443 bt.push(method, bci, CHECK); 2444 total_count++; 2445 } 2446 2447 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2448 2449 // Put completed stack trace into throwable object 2450 set_backtrace(throwable(), bt.backtrace()); 2451 set_depth(throwable(), total_count); 2452 } 2453 2454 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2455 // No-op if stack trace is disabled 2456 if (!StackTraceInThrowable) { 2457 return; 2458 } 2459 2460 // Disable stack traces for some preallocated out of memory errors 2461 if (!Universe::should_fill_in_stack_trace(throwable)) { 2462 return; 2463 } 2464 2465 PRESERVE_EXCEPTION_MARK; 2466 2467 JavaThread* thread = JavaThread::active(); 2468 fill_in_stack_trace(throwable, method, thread); 2469 // ignore exceptions thrown during stack trace filling 2470 CLEAR_PENDING_EXCEPTION; 2471 } 2472 2473 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2474 // Allocate stack trace - backtrace is created but not filled in 2475 2476 // No-op if stack trace is disabled 2477 if (!StackTraceInThrowable) return; 2478 BacktraceBuilder bt(CHECK); // creates a backtrace 2479 set_backtrace(throwable(), bt.backtrace()); 2480 } 2481 2482 2483 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2484 // Fill in stack trace into preallocated backtrace (no GC) 2485 2486 // No-op if stack trace is disabled 2487 if (!StackTraceInThrowable) return; 2488 2489 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2490 2491 JavaThread* THREAD = JavaThread::current(); 2492 2493 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2494 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2495 2496 ResourceMark rm(THREAD); 2497 vframeStream st(THREAD); 2498 2499 BacktraceBuilder bt(THREAD, backtrace); 2500 2501 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2502 // methods as preallocated errors aren't created by "java" code. 2503 2504 // fill in as much stack trace as possible 2505 int chunk_count = 0; 2506 for (;!st.at_end(); st.next()) { 2507 bt.push(st.method(), st.bci(), CHECK); 2508 chunk_count++; 2509 2510 // Bail-out for deep stacks 2511 if (chunk_count >= trace_chunk_size) break; 2512 } 2513 set_depth(throwable(), chunk_count); 2514 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2515 2516 // We support the Throwable immutability protocol defined for Java 7. 2517 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2518 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2519 } 2520 2521 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2522 objArrayHandle stack_trace_array_h, TRAPS) { 2523 2524 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2525 THROW(vmSymbols::java_lang_NullPointerException()); 2526 } 2527 2528 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2529 2530 if (stack_trace_array_h->length() != depth(throwable())) { 2531 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2532 } 2533 2534 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2535 BacktraceIterator iter(result, THREAD); 2536 2537 int index = 0; 2538 while (iter.repeat()) { 2539 BacktraceElement bte = iter.next(THREAD); 2540 2541 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2542 2543 if (stack_trace_element.is_null()) { 2544 THROW(vmSymbols::java_lang_NullPointerException()); 2545 } 2546 2547 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2548 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2549 2550 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2551 method, 2552 bte._version, 2553 bte._bci, 2554 bte._name, CHECK); 2555 } 2556 } 2557 2558 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2559 // Allocate java.lang.StackTraceElement instance 2560 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2561 assert(k != NULL, "must be loaded in 1.4+"); 2562 if (k->should_be_initialized()) { 2563 k->initialize(CHECK_0); 2564 } 2565 2566 Handle element = k->allocate_instance_handle(CHECK_0); 2567 2568 int version = method->constants()->version(); 2569 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2570 return element(); 2571 } 2572 2573 void java_lang_StackTraceElement::fill_in(Handle element, 2574 InstanceKlass* holder, const methodHandle& method, 2575 int version, int bci, Symbol* name, TRAPS) { 2576 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2577 2578 ResourceMark rm(THREAD); 2579 HandleMark hm(THREAD); 2580 2581 // Fill in class name 2582 Handle java_class(THREAD, holder->java_mirror()); 2583 oop classname = java_lang_Class::name(java_class, CHECK); 2584 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2585 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2586 2587 oop loader = holder->class_loader(); 2588 if (loader != NULL) { 2589 oop loader_name = java_lang_ClassLoader::name(loader); 2590 if (loader_name != NULL) 2591 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2592 } 2593 2594 // Fill in method name 2595 oop methodname = StringTable::intern(name, CHECK); 2596 java_lang_StackTraceElement::set_methodName(element(), methodname); 2597 2598 // Fill in module name and version 2599 ModuleEntry* module = holder->module(); 2600 if (module->is_named()) { 2601 oop module_name = StringTable::intern(module->name(), CHECK); 2602 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2603 oop module_version; 2604 if (module->version() != NULL) { 2605 module_version = StringTable::intern(module->version(), CHECK); 2606 } else { 2607 module_version = NULL; 2608 } 2609 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2610 } 2611 2612 if (method() == NULL || !version_matches(method(), version)) { 2613 // The method was redefined, accurate line number information isn't available 2614 java_lang_StackTraceElement::set_fileName(element(), NULL); 2615 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2616 } else { 2617 // Fill in source file name and line number. 2618 Symbol* source = Backtrace::get_source_file_name(holder, version); 2619 oop source_file = java_lang_Class::source_file(java_class()); 2620 if (source != NULL) { 2621 // Class was not redefined. We can trust its cache if set, 2622 // else we have to initialize it. 2623 if (source_file == NULL) { 2624 source_file = StringTable::intern(source, CHECK); 2625 java_lang_Class::set_source_file(java_class(), source_file); 2626 } 2627 } else { 2628 // Class was redefined. Dump the cache if it was set. 2629 if (source_file != NULL) { 2630 source_file = NULL; 2631 java_lang_Class::set_source_file(java_class(), source_file); 2632 } 2633 if (ShowHiddenFrames) { 2634 source = vmSymbols::unknown_class_name(); 2635 source_file = StringTable::intern(source, CHECK); 2636 } 2637 } 2638 java_lang_StackTraceElement::set_fileName(element(), source_file); 2639 2640 int line_number = Backtrace::get_line_number(method, bci); 2641 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2642 } 2643 } 2644 2645 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2646 HandleMark hm(THREAD); 2647 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2648 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2649 // we should expand MemberName::name when Throwable uses StackTrace 2650 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2651 return method; 2652 } 2653 2654 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2655 // set Method* or mid/cpref 2656 HandleMark hm(THREAD); 2657 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2658 InstanceKlass* ik = method->method_holder(); 2659 CallInfo info(method(), ik, CHECK); 2660 MethodHandles::init_method_MemberName(mname, info); 2661 // set bci 2662 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2663 // method may be redefined; store the version 2664 int version = method->constants()->version(); 2665 assert((jushort)version == version, "version should be short"); 2666 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2667 } 2668 2669 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2670 ResourceMark rm(THREAD); 2671 HandleMark hm(THREAD); 2672 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2673 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2674 InstanceKlass* holder = InstanceKlass::cast(clazz); 2675 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2676 2677 short version = stackFrame->short_field(_version_offset); 2678 short bci = stackFrame->short_field(_bci_offset); 2679 Symbol* name = method->name(); 2680 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2681 } 2682 2683 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2684 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2685 macro(_bci_offset, k, "bci", short_signature, false) 2686 2687 void java_lang_StackFrameInfo::compute_offsets() { 2688 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2689 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2690 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2691 } 2692 2693 #if INCLUDE_CDS 2694 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2695 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2696 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2697 } 2698 #endif 2699 2700 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2701 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2702 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2703 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2704 macro(_mode_offset, k, "mode", int_signature, false) 2705 2706 void java_lang_LiveStackFrameInfo::compute_offsets() { 2707 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2708 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2709 } 2710 2711 #if INCLUDE_CDS 2712 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2713 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2714 } 2715 #endif 2716 2717 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2718 macro(override_offset, k, "override", bool_signature, false) 2719 2720 void java_lang_reflect_AccessibleObject::compute_offsets() { 2721 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2722 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2723 } 2724 2725 #if INCLUDE_CDS 2726 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2727 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2728 } 2729 #endif 2730 2731 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2733 return (jboolean) reflect->bool_field(override_offset); 2734 } 2735 2736 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 reflect->bool_field_put(override_offset, (int) value); 2739 } 2740 2741 #define METHOD_FIELDS_DO(macro) \ 2742 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2743 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2744 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2745 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2746 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2747 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2748 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2749 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2750 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2751 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2752 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2753 2754 void java_lang_reflect_Method::compute_offsets() { 2755 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2756 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2757 } 2758 2759 #if INCLUDE_CDS 2760 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2761 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2762 } 2763 #endif 2764 2765 Handle java_lang_reflect_Method::create(TRAPS) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 Klass* klass = SystemDictionary::reflect_Method_klass(); 2768 // This class is eagerly initialized during VM initialization, since we keep a refence 2769 // to one of the methods 2770 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2771 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2772 } 2773 2774 oop java_lang_reflect_Method::clazz(oop reflect) { 2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2776 return reflect->obj_field(clazz_offset); 2777 } 2778 2779 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2781 reflect->obj_field_put(clazz_offset, value); 2782 } 2783 2784 int java_lang_reflect_Method::slot(oop reflect) { 2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2786 return reflect->int_field(slot_offset); 2787 } 2788 2789 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2791 reflect->int_field_put(slot_offset, value); 2792 } 2793 2794 void java_lang_reflect_Method::set_name(oop method, oop value) { 2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2796 method->obj_field_put(name_offset, value); 2797 } 2798 2799 oop java_lang_reflect_Method::return_type(oop method) { 2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2801 return method->obj_field(returnType_offset); 2802 } 2803 2804 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2806 method->obj_field_put(returnType_offset, value); 2807 } 2808 2809 oop java_lang_reflect_Method::parameter_types(oop method) { 2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2811 return method->obj_field(parameterTypes_offset); 2812 } 2813 2814 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2816 method->obj_field_put(parameterTypes_offset, value); 2817 } 2818 2819 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2821 method->obj_field_put(exceptionTypes_offset, value); 2822 } 2823 2824 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2826 method->int_field_put(modifiers_offset, value); 2827 } 2828 2829 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2831 method->obj_field_put(signature_offset, value); 2832 } 2833 2834 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2836 method->obj_field_put(annotations_offset, value); 2837 } 2838 2839 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2841 method->obj_field_put(parameter_annotations_offset, value); 2842 } 2843 2844 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2846 method->obj_field_put(annotation_default_offset, value); 2847 } 2848 2849 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2850 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2851 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2852 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2853 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2854 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2855 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2856 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2857 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2858 2859 void java_lang_reflect_Constructor::compute_offsets() { 2860 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2861 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2862 } 2863 2864 #if INCLUDE_CDS 2865 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2866 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2867 } 2868 #endif 2869 2870 Handle java_lang_reflect_Constructor::create(TRAPS) { 2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2872 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2873 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2874 InstanceKlass* ik = InstanceKlass::cast(k); 2875 // Ensure it is initialized 2876 ik->initialize(CHECK_NH); 2877 return ik->allocate_instance_handle(THREAD); 2878 } 2879 2880 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2882 return reflect->obj_field(clazz_offset); 2883 } 2884 2885 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2887 reflect->obj_field_put(clazz_offset, value); 2888 } 2889 2890 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2892 return constructor->obj_field(parameterTypes_offset); 2893 } 2894 2895 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2897 constructor->obj_field_put(parameterTypes_offset, value); 2898 } 2899 2900 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2902 constructor->obj_field_put(exceptionTypes_offset, value); 2903 } 2904 2905 int java_lang_reflect_Constructor::slot(oop reflect) { 2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2907 return reflect->int_field(slot_offset); 2908 } 2909 2910 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2912 reflect->int_field_put(slot_offset, value); 2913 } 2914 2915 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2917 constructor->int_field_put(modifiers_offset, value); 2918 } 2919 2920 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2922 constructor->obj_field_put(signature_offset, value); 2923 } 2924 2925 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2927 constructor->obj_field_put(annotations_offset, value); 2928 } 2929 2930 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2931 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2932 method->obj_field_put(parameter_annotations_offset, value); 2933 } 2934 2935 #define FIELD_FIELDS_DO(macro) \ 2936 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2937 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2938 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2939 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2940 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2941 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2942 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2943 2944 void java_lang_reflect_Field::compute_offsets() { 2945 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2946 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2947 } 2948 2949 #if INCLUDE_CDS 2950 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2951 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2952 } 2953 #endif 2954 2955 Handle java_lang_reflect_Field::create(TRAPS) { 2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2957 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2958 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2959 InstanceKlass* ik = InstanceKlass::cast(k); 2960 // Ensure it is initialized 2961 ik->initialize(CHECK_NH); 2962 return ik->allocate_instance_handle(THREAD); 2963 } 2964 2965 oop java_lang_reflect_Field::clazz(oop reflect) { 2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2967 return reflect->obj_field(clazz_offset); 2968 } 2969 2970 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2972 reflect->obj_field_put(clazz_offset, value); 2973 } 2974 2975 oop java_lang_reflect_Field::name(oop field) { 2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2977 return field->obj_field(name_offset); 2978 } 2979 2980 void java_lang_reflect_Field::set_name(oop field, oop value) { 2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2982 field->obj_field_put(name_offset, value); 2983 } 2984 2985 oop java_lang_reflect_Field::type(oop field) { 2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2987 return field->obj_field(type_offset); 2988 } 2989 2990 void java_lang_reflect_Field::set_type(oop field, oop value) { 2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2992 field->obj_field_put(type_offset, value); 2993 } 2994 2995 int java_lang_reflect_Field::slot(oop reflect) { 2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2997 return reflect->int_field(slot_offset); 2998 } 2999 3000 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3002 reflect->int_field_put(slot_offset, value); 3003 } 3004 3005 int java_lang_reflect_Field::modifiers(oop field) { 3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3007 return field->int_field(modifiers_offset); 3008 } 3009 3010 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3012 field->int_field_put(modifiers_offset, value); 3013 } 3014 3015 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3017 field->obj_field_put(signature_offset, value); 3018 } 3019 3020 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3022 field->obj_field_put(annotations_offset, value); 3023 } 3024 3025 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3026 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3027 3028 void reflect_ConstantPool::compute_offsets() { 3029 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3030 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3031 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3032 } 3033 3034 #if INCLUDE_CDS 3035 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3036 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3037 } 3038 #endif 3039 3040 #define PARAMETER_FIELDS_DO(macro) \ 3041 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3042 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3043 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3044 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3045 3046 void java_lang_reflect_Parameter::compute_offsets() { 3047 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3048 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3049 } 3050 3051 #if INCLUDE_CDS 3052 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3053 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3054 } 3055 #endif 3056 3057 Handle java_lang_reflect_Parameter::create(TRAPS) { 3058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3059 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3060 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3061 InstanceKlass* ik = InstanceKlass::cast(k); 3062 // Ensure it is initialized 3063 ik->initialize(CHECK_NH); 3064 return ik->allocate_instance_handle(THREAD); 3065 } 3066 3067 oop java_lang_reflect_Parameter::name(oop param) { 3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3069 return param->obj_field(name_offset); 3070 } 3071 3072 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3074 param->obj_field_put(name_offset, value); 3075 } 3076 3077 int java_lang_reflect_Parameter::modifiers(oop param) { 3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3079 return param->int_field(modifiers_offset); 3080 } 3081 3082 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3084 param->int_field_put(modifiers_offset, value); 3085 } 3086 3087 int java_lang_reflect_Parameter::index(oop param) { 3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3089 return param->int_field(index_offset); 3090 } 3091 3092 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3094 param->int_field_put(index_offset, value); 3095 } 3096 3097 oop java_lang_reflect_Parameter::executable(oop param) { 3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3099 return param->obj_field(executable_offset); 3100 } 3101 3102 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3104 param->obj_field_put(executable_offset, value); 3105 } 3106 3107 3108 int java_lang_Module::loader_offset; 3109 int java_lang_Module::name_offset; 3110 int java_lang_Module::_module_entry_offset = -1; 3111 3112 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3114 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3115 vmSymbols::java_lang_module_init_signature(), 3116 loader, module_name, CHECK_NH); 3117 } 3118 3119 #define MODULE_FIELDS_DO(macro) \ 3120 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3121 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3122 3123 void java_lang_Module::compute_offsets() { 3124 InstanceKlass* k = SystemDictionary::Module_klass(); 3125 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3126 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3127 } 3128 3129 #if INCLUDE_CDS 3130 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3131 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3132 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3133 } 3134 #endif 3135 3136 oop java_lang_Module::loader(oop module) { 3137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3138 return module->obj_field(loader_offset); 3139 } 3140 3141 void java_lang_Module::set_loader(oop module, oop value) { 3142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3143 module->obj_field_put(loader_offset, value); 3144 } 3145 3146 oop java_lang_Module::name(oop module) { 3147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3148 return module->obj_field(name_offset); 3149 } 3150 3151 void java_lang_Module::set_name(oop module, oop value) { 3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3153 module->obj_field_put(name_offset, value); 3154 } 3155 3156 ModuleEntry* java_lang_Module::module_entry(oop module) { 3157 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3158 assert(module != NULL, "module can't be null"); 3159 assert(oopDesc::is_oop(module), "module must be oop"); 3160 3161 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3162 if (module_entry == NULL) { 3163 // If the inject field containing the ModuleEntry* is null then return the 3164 // class loader's unnamed module. 3165 oop loader = java_lang_Module::loader(module); 3166 Handle h_loader = Handle(Thread::current(), loader); 3167 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3168 return loader_cld->unnamed_module(); 3169 } 3170 return module_entry; 3171 } 3172 3173 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3174 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3175 assert(module != NULL, "module can't be null"); 3176 assert(oopDesc::is_oop(module), "module must be oop"); 3177 module->address_field_put(_module_entry_offset, (address)module_entry); 3178 } 3179 3180 Handle reflect_ConstantPool::create(TRAPS) { 3181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3182 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3183 // Ensure it is initialized 3184 k->initialize(CHECK_NH); 3185 return k->allocate_instance_handle(THREAD); 3186 } 3187 3188 3189 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3191 oop mirror = value->pool_holder()->java_mirror(); 3192 // Save the mirror to get back the constant pool. 3193 reflect->obj_field_put(_oop_offset, mirror); 3194 } 3195 3196 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3198 3199 oop mirror = reflect->obj_field(_oop_offset); 3200 Klass* k = java_lang_Class::as_Klass(mirror); 3201 assert(k->is_instance_klass(), "Must be"); 3202 3203 // Get the constant pool back from the klass. Since class redefinition 3204 // merges the new constant pool into the old, this is essentially the 3205 // same constant pool as the original. If constant pool merging is 3206 // no longer done in the future, this will have to change to save 3207 // the original. 3208 return InstanceKlass::cast(k)->constants(); 3209 } 3210 3211 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3212 macro(_base_offset, k, "base", object_signature, false) 3213 3214 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3215 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3216 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3217 } 3218 3219 #if INCLUDE_CDS 3220 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3221 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3222 } 3223 #endif 3224 3225 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3226 Klass* k = SystemDictionary::box_klass(type); 3227 if (k == NULL) return NULL; 3228 InstanceKlass* ik = InstanceKlass::cast(k); 3229 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3230 return ik->allocate_instance(THREAD); 3231 } 3232 3233 3234 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3235 oop box = initialize_and_allocate(type, CHECK_0); 3236 if (box == NULL) return NULL; 3237 switch (type) { 3238 case T_BOOLEAN: 3239 box->bool_field_put(value_offset, value->z); 3240 break; 3241 case T_CHAR: 3242 box->char_field_put(value_offset, value->c); 3243 break; 3244 case T_FLOAT: 3245 box->float_field_put(value_offset, value->f); 3246 break; 3247 case T_DOUBLE: 3248 box->double_field_put(long_value_offset, value->d); 3249 break; 3250 case T_BYTE: 3251 box->byte_field_put(value_offset, value->b); 3252 break; 3253 case T_SHORT: 3254 box->short_field_put(value_offset, value->s); 3255 break; 3256 case T_INT: 3257 box->int_field_put(value_offset, value->i); 3258 break; 3259 case T_LONG: 3260 box->long_field_put(long_value_offset, value->j); 3261 break; 3262 default: 3263 return NULL; 3264 } 3265 return box; 3266 } 3267 3268 3269 BasicType java_lang_boxing_object::basic_type(oop box) { 3270 if (box == NULL) return T_ILLEGAL; 3271 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3272 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3273 return T_ILLEGAL; 3274 return type; 3275 } 3276 3277 3278 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3279 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3280 switch (type) { 3281 case T_BOOLEAN: 3282 value->z = box->bool_field(value_offset); 3283 break; 3284 case T_CHAR: 3285 value->c = box->char_field(value_offset); 3286 break; 3287 case T_FLOAT: 3288 value->f = box->float_field(value_offset); 3289 break; 3290 case T_DOUBLE: 3291 value->d = box->double_field(long_value_offset); 3292 break; 3293 case T_BYTE: 3294 value->b = box->byte_field(value_offset); 3295 break; 3296 case T_SHORT: 3297 value->s = box->short_field(value_offset); 3298 break; 3299 case T_INT: 3300 value->i = box->int_field(value_offset); 3301 break; 3302 case T_LONG: 3303 value->j = box->long_field(long_value_offset); 3304 break; 3305 default: 3306 return T_ILLEGAL; 3307 } // end switch 3308 return type; 3309 } 3310 3311 3312 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3313 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3314 switch (type) { 3315 case T_BOOLEAN: 3316 box->bool_field_put(value_offset, value->z); 3317 break; 3318 case T_CHAR: 3319 box->char_field_put(value_offset, value->c); 3320 break; 3321 case T_FLOAT: 3322 box->float_field_put(value_offset, value->f); 3323 break; 3324 case T_DOUBLE: 3325 box->double_field_put(long_value_offset, value->d); 3326 break; 3327 case T_BYTE: 3328 box->byte_field_put(value_offset, value->b); 3329 break; 3330 case T_SHORT: 3331 box->short_field_put(value_offset, value->s); 3332 break; 3333 case T_INT: 3334 box->int_field_put(value_offset, value->i); 3335 break; 3336 case T_LONG: 3337 box->long_field_put(long_value_offset, value->j); 3338 break; 3339 default: 3340 return T_ILLEGAL; 3341 } // end switch 3342 return type; 3343 } 3344 3345 3346 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3347 switch (type) { 3348 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3349 case T_CHAR: st->print("%d", value->c); break; 3350 case T_BYTE: st->print("%d", value->b); break; 3351 case T_SHORT: st->print("%d", value->s); break; 3352 case T_INT: st->print("%d", value->i); break; 3353 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3354 case T_FLOAT: st->print("%f", value->f); break; 3355 case T_DOUBLE: st->print("%lf", value->d); break; 3356 default: st->print("type %d?", type); break; 3357 } 3358 } 3359 3360 // Support for java_lang_ref_Reference 3361 3362 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3363 assert(obj != NULL, "sanity"); 3364 if (offset != java_lang_ref_Reference::referent_offset) { 3365 return false; 3366 } 3367 3368 Klass* k = obj->klass(); 3369 if (!k->is_instance_klass()) { 3370 return false; 3371 } 3372 3373 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3374 bool is_reference = ik->reference_type() != REF_NONE; 3375 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3376 return is_reference; 3377 } 3378 3379 // Support for java_lang_ref_SoftReference 3380 // 3381 3382 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3383 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3384 macro(static_clock_offset, k, "clock", long_signature, true) 3385 3386 void java_lang_ref_SoftReference::compute_offsets() { 3387 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3388 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3389 } 3390 3391 #if INCLUDE_CDS 3392 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3393 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3394 } 3395 #endif 3396 3397 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3398 return ref->long_field(timestamp_offset); 3399 } 3400 3401 jlong java_lang_ref_SoftReference::clock() { 3402 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3403 oop base = ik->static_field_base_raw(); 3404 return base->long_field(static_clock_offset); 3405 } 3406 3407 void java_lang_ref_SoftReference::set_clock(jlong value) { 3408 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3409 oop base = ik->static_field_base_raw(); 3410 base->long_field_put(static_clock_offset, value); 3411 } 3412 3413 // Support for java_lang_invoke_DirectMethodHandle 3414 3415 int java_lang_invoke_DirectMethodHandle::_member_offset; 3416 3417 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3418 oop member_name = NULL; 3419 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3420 "a DirectMethodHandle oop is expected"); 3421 return dmh->obj_field(member_offset_in_bytes()); 3422 } 3423 3424 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3425 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3426 3427 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3428 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3429 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3430 } 3431 3432 #if INCLUDE_CDS 3433 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3434 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3435 } 3436 #endif 3437 3438 // Support for java_lang_invoke_MethodHandle 3439 3440 int java_lang_invoke_MethodHandle::_type_offset; 3441 int java_lang_invoke_MethodHandle::_form_offset; 3442 3443 int java_lang_invoke_MemberName::_clazz_offset; 3444 int java_lang_invoke_MemberName::_name_offset; 3445 int java_lang_invoke_MemberName::_type_offset; 3446 int java_lang_invoke_MemberName::_flags_offset; 3447 int java_lang_invoke_MemberName::_method_offset; 3448 int java_lang_invoke_MemberName::_vmindex_offset; 3449 3450 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3451 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3452 3453 int java_lang_invoke_LambdaForm::_vmentry_offset; 3454 3455 #define METHODHANDLE_FIELDS_DO(macro) \ 3456 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3457 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3458 3459 void java_lang_invoke_MethodHandle::compute_offsets() { 3460 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3461 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3462 } 3463 3464 #if INCLUDE_CDS 3465 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3466 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3467 } 3468 #endif 3469 3470 #define MEMBERNAME_FIELDS_DO(macro) \ 3471 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3472 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3473 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3474 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3475 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3476 3477 void java_lang_invoke_MemberName::compute_offsets() { 3478 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3479 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3480 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3481 } 3482 3483 #if INCLUDE_CDS 3484 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3485 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3486 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3487 } 3488 #endif 3489 3490 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3491 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3492 assert(k != NULL, "jdk mismatch"); 3493 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3494 } 3495 3496 #if INCLUDE_CDS 3497 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3498 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3499 } 3500 #endif 3501 3502 #define LAMBDAFORM_FIELDS_DO(macro) \ 3503 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3504 3505 void java_lang_invoke_LambdaForm::compute_offsets() { 3506 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3507 assert (k != NULL, "jdk mismatch"); 3508 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3509 } 3510 3511 #if INCLUDE_CDS 3512 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3513 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3514 } 3515 #endif 3516 3517 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3518 return obj != NULL && is_subclass(obj->klass()); 3519 } 3520 3521 3522 oop java_lang_invoke_MethodHandle::type(oop mh) { 3523 return mh->obj_field(_type_offset); 3524 } 3525 3526 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3527 mh->obj_field_put(_type_offset, mtype); 3528 } 3529 3530 oop java_lang_invoke_MethodHandle::form(oop mh) { 3531 assert(_form_offset != 0, ""); 3532 return mh->obj_field(_form_offset); 3533 } 3534 3535 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3536 assert(_form_offset != 0, ""); 3537 mh->obj_field_put(_form_offset, lform); 3538 } 3539 3540 /// MemberName accessors 3541 3542 oop java_lang_invoke_MemberName::clazz(oop mname) { 3543 assert(is_instance(mname), "wrong type"); 3544 return mname->obj_field(_clazz_offset); 3545 } 3546 3547 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3548 assert(is_instance(mname), "wrong type"); 3549 mname->obj_field_put(_clazz_offset, clazz); 3550 } 3551 3552 oop java_lang_invoke_MemberName::name(oop mname) { 3553 assert(is_instance(mname), "wrong type"); 3554 return mname->obj_field(_name_offset); 3555 } 3556 3557 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3558 assert(is_instance(mname), "wrong type"); 3559 mname->obj_field_put(_name_offset, name); 3560 } 3561 3562 oop java_lang_invoke_MemberName::type(oop mname) { 3563 assert(is_instance(mname), "wrong type"); 3564 return mname->obj_field(_type_offset); 3565 } 3566 3567 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3568 assert(is_instance(mname), "wrong type"); 3569 mname->obj_field_put(_type_offset, type); 3570 } 3571 3572 int java_lang_invoke_MemberName::flags(oop mname) { 3573 assert(is_instance(mname), "wrong type"); 3574 return mname->int_field(_flags_offset); 3575 } 3576 3577 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3578 assert(is_instance(mname), "wrong type"); 3579 mname->int_field_put(_flags_offset, flags); 3580 } 3581 3582 3583 // Return vmtarget from ResolvedMethodName method field through indirection 3584 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3585 assert(is_instance(mname), "wrong type"); 3586 oop method = mname->obj_field(_method_offset); 3587 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3588 } 3589 3590 bool java_lang_invoke_MemberName::is_method(oop mname) { 3591 assert(is_instance(mname), "must be MemberName"); 3592 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3593 } 3594 3595 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3596 assert(is_instance(mname), "wrong type"); 3597 mname->obj_field_put(_method_offset, resolved_method); 3598 } 3599 3600 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3601 assert(is_instance(mname), "wrong type"); 3602 return (intptr_t) mname->address_field(_vmindex_offset); 3603 } 3604 3605 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3606 assert(is_instance(mname), "wrong type"); 3607 mname->address_field_put(_vmindex_offset, (address) index); 3608 } 3609 3610 3611 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3612 assert(is_instance(resolved_method), "wrong type"); 3613 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3614 assert(m->is_method(), "must be"); 3615 return m; 3616 } 3617 3618 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3619 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3620 assert(is_instance(resolved_method), "wrong type"); 3621 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3622 } 3623 3624 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3625 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3626 oop resolved_method = ResolvedMethodTable::find_method(m()); 3627 if (resolved_method == NULL) { 3628 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3629 if (!k->is_initialized()) { 3630 k->initialize(CHECK_NULL); 3631 } 3632 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3633 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3634 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3635 // distinct loaders) to ensure the metadata is kept alive. 3636 // This mirror may be different than the one in clazz field. 3637 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3638 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method)); 3639 } 3640 return resolved_method; 3641 } 3642 3643 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3644 assert(is_instance(lform), "wrong type"); 3645 return lform->obj_field(_vmentry_offset); 3646 } 3647 3648 3649 // Support for java_lang_invoke_MethodType 3650 3651 int java_lang_invoke_MethodType::_rtype_offset; 3652 int java_lang_invoke_MethodType::_ptypes_offset; 3653 3654 #define METHODTYPE_FIELDS_DO(macro) \ 3655 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3656 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3657 3658 void java_lang_invoke_MethodType::compute_offsets() { 3659 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3660 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3661 } 3662 3663 #if INCLUDE_CDS 3664 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3665 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3666 } 3667 #endif 3668 3669 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3670 st->print("("); 3671 objArrayOop pts = ptypes(mt); 3672 for (int i = 0, limit = pts->length(); i < limit; i++) { 3673 java_lang_Class::print_signature(pts->obj_at(i), st); 3674 } 3675 st->print(")"); 3676 java_lang_Class::print_signature(rtype(mt), st); 3677 } 3678 3679 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3680 ResourceMark rm; 3681 stringStream buffer(128); 3682 print_signature(mt, &buffer); 3683 const char* sigstr = buffer.base(); 3684 int siglen = (int) buffer.size(); 3685 Symbol *name; 3686 if (!intern_if_not_found) { 3687 name = SymbolTable::probe(sigstr, siglen); 3688 } else { 3689 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3690 } 3691 return name; 3692 } 3693 3694 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3695 if (oopDesc::equals(mt1, mt2)) 3696 return true; 3697 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3698 return false; 3699 if (ptype_count(mt1) != ptype_count(mt2)) 3700 return false; 3701 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3702 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3703 return false; 3704 } 3705 return true; 3706 } 3707 3708 oop java_lang_invoke_MethodType::rtype(oop mt) { 3709 assert(is_instance(mt), "must be a MethodType"); 3710 return mt->obj_field(_rtype_offset); 3711 } 3712 3713 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3714 assert(is_instance(mt), "must be a MethodType"); 3715 return (objArrayOop) mt->obj_field(_ptypes_offset); 3716 } 3717 3718 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3719 return ptypes(mt)->obj_at(idx); 3720 } 3721 3722 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3723 return ptypes(mt)->length(); 3724 } 3725 3726 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3727 objArrayOop pts = ptypes(mt); 3728 int count = pts->length(); 3729 int slots = 0; 3730 for (int i = 0; i < count; i++) { 3731 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3732 slots += type2size[bt]; 3733 } 3734 return slots; 3735 } 3736 3737 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3738 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3739 return type2size[bt]; 3740 } 3741 3742 3743 // Support for java_lang_invoke_CallSite 3744 3745 int java_lang_invoke_CallSite::_target_offset; 3746 int java_lang_invoke_CallSite::_context_offset; 3747 3748 #define CALLSITE_FIELDS_DO(macro) \ 3749 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3750 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3751 3752 void java_lang_invoke_CallSite::compute_offsets() { 3753 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3754 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3755 } 3756 3757 #if INCLUDE_CDS 3758 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3759 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3760 } 3761 #endif 3762 3763 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3764 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3765 3766 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3767 return dep_oop; 3768 } 3769 3770 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3771 3772 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3773 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3774 3775 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3776 InstanceKlass* k = SystemDictionary::Context_klass(); 3777 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3778 } 3779 3780 #if INCLUDE_CDS 3781 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3782 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3783 } 3784 #endif 3785 3786 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3787 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3788 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3789 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3790 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3791 return dep_ctx; 3792 } 3793 3794 // Support for java_security_AccessControlContext 3795 3796 int java_security_AccessControlContext::_context_offset = 0; 3797 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3798 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3799 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3800 3801 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3802 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3803 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3804 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3805 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3806 3807 void java_security_AccessControlContext::compute_offsets() { 3808 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3809 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3810 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3811 } 3812 3813 #if INCLUDE_CDS 3814 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3815 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3816 } 3817 #endif 3818 3819 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3820 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3821 // Ensure klass is initialized 3822 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3823 // Allocate result 3824 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3825 // Fill in values 3826 result->obj_field_put(_context_offset, context()); 3827 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3828 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3829 // whitelist AccessControlContexts created by the JVM if present 3830 if (_isAuthorized_offset != -1) { 3831 result->bool_field_put(_isAuthorized_offset, true); 3832 } 3833 return result; 3834 } 3835 3836 3837 // Support for java_lang_ClassLoader 3838 3839 bool java_lang_ClassLoader::offsets_computed = false; 3840 int java_lang_ClassLoader::_loader_data_offset = -1; 3841 int java_lang_ClassLoader::parallelCapable_offset = -1; 3842 int java_lang_ClassLoader::name_offset = -1; 3843 int java_lang_ClassLoader::nameAndId_offset = -1; 3844 int java_lang_ClassLoader::unnamedModule_offset = -1; 3845 3846 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3847 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3848 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3849 } 3850 3851 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3852 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3853 return RawAccess<>::load_at(loader, _loader_data_offset); 3854 } 3855 3856 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3857 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3858 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3859 } 3860 3861 #define CLASSLOADER_FIELDS_DO(macro) \ 3862 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3863 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3864 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3865 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3866 macro(parent_offset, k1, "parent", classloader_signature, false) 3867 3868 void java_lang_ClassLoader::compute_offsets() { 3869 assert(!offsets_computed, "offsets should be initialized only once"); 3870 offsets_computed = true; 3871 3872 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3873 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3874 3875 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3876 } 3877 3878 #if INCLUDE_CDS 3879 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3880 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3881 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3882 } 3883 #endif 3884 3885 oop java_lang_ClassLoader::parent(oop loader) { 3886 assert(is_instance(loader), "loader must be oop"); 3887 return loader->obj_field(parent_offset); 3888 } 3889 3890 // Returns the name field of this class loader. If the name field has not 3891 // been set, null will be returned. 3892 oop java_lang_ClassLoader::name(oop loader) { 3893 assert(is_instance(loader), "loader must be oop"); 3894 return loader->obj_field(name_offset); 3895 } 3896 3897 // Returns the nameAndId field of this class loader. The format is 3898 // as follows: 3899 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3900 // If the defining loader has no name then <qualified-class-name> @<id> 3901 // If built-in loader, then omit '@<id>' as there is only one instance. 3902 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3903 oop java_lang_ClassLoader::nameAndId(oop loader) { 3904 assert(is_instance(loader), "loader must be oop"); 3905 return loader->obj_field(nameAndId_offset); 3906 } 3907 3908 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3909 assert(is_instance(loader), "loader must be oop"); 3910 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3911 oop acl = loader; 3912 debug_only(jint loop_count = 0); 3913 // This loop taken verbatim from ClassLoader.java: 3914 do { 3915 acl = parent(acl); 3916 if (oopDesc::equals(cl, acl)) { 3917 return true; 3918 } 3919 assert(++loop_count > 0, "loop_count overflow"); 3920 } while (acl != NULL); 3921 return false; 3922 } 3923 3924 bool java_lang_ClassLoader::is_instance(oop obj) { 3925 return obj != NULL && is_subclass(obj->klass()); 3926 } 3927 3928 3929 // For class loader classes, parallelCapable defined 3930 // based on non-null field 3931 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3932 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3933 if (parallelCapable_offset == -1) { 3934 // Default for backward compatibility is false 3935 return false; 3936 } 3937 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3938 } 3939 3940 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3941 // Fix for 4474172; see evaluation for more details 3942 loader = non_reflection_class_loader(loader); 3943 3944 oop cl = SystemDictionary::java_system_loader(); 3945 while(cl != NULL) { 3946 if (oopDesc::equals(cl, loader)) return true; 3947 cl = parent(cl); 3948 } 3949 return false; 3950 } 3951 3952 // Return true if this is one of the class loaders associated with 3953 // the generated bytecodes for reflection. 3954 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3955 if (loader != NULL) { 3956 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3957 // This might be null in non-1.4 JDKs 3958 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3959 } 3960 return false; 3961 } 3962 3963 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3964 // See whether this is one of the class loaders associated with 3965 // the generated bytecodes for reflection, and if so, "magically" 3966 // delegate to its parent to prevent class loading from occurring 3967 // in places where applications using reflection didn't expect it. 3968 if (is_reflection_class_loader(loader)) { 3969 return parent(loader); 3970 } 3971 return loader; 3972 } 3973 3974 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3975 assert(is_instance(loader), "loader must be oop"); 3976 return loader->obj_field(unnamedModule_offset); 3977 } 3978 3979 // Support for java_lang_System 3980 // 3981 #define SYSTEM_FIELDS_DO(macro) \ 3982 macro(static_in_offset, k, "in", input_stream_signature, true); \ 3983 macro(static_out_offset, k, "out", print_stream_signature, true); \ 3984 macro(static_err_offset, k, "err", print_stream_signature, true); \ 3985 macro(static_security_offset, k, "security", security_manager_signature, true) 3986 3987 void java_lang_System::compute_offsets() { 3988 InstanceKlass* k = SystemDictionary::System_klass(); 3989 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3990 } 3991 3992 #if INCLUDE_CDS 3993 void java_lang_System::serialize_offsets(SerializeClosure* f) { 3994 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3995 } 3996 #endif 3997 3998 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 3999 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4000 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4001 4002 int java_lang_Class::_klass_offset; 4003 int java_lang_Class::_array_klass_offset; 4004 int java_lang_Class::_oop_size_offset; 4005 int java_lang_Class::_static_oop_field_count_offset; 4006 int java_lang_Class::_class_loader_offset; 4007 int java_lang_Class::_module_offset; 4008 int java_lang_Class::_protection_domain_offset; 4009 int java_lang_Class::_component_mirror_offset; 4010 int java_lang_Class::_init_lock_offset; 4011 int java_lang_Class::_signers_offset; 4012 int java_lang_Class::_name_offset; 4013 int java_lang_Class::_source_file_offset; 4014 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4015 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4016 int java_lang_Throwable::backtrace_offset; 4017 int java_lang_Throwable::detailMessage_offset; 4018 int java_lang_Throwable::stackTrace_offset; 4019 int java_lang_Throwable::depth_offset; 4020 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4021 int java_lang_reflect_AccessibleObject::override_offset; 4022 int java_lang_reflect_Method::clazz_offset; 4023 int java_lang_reflect_Method::name_offset; 4024 int java_lang_reflect_Method::returnType_offset; 4025 int java_lang_reflect_Method::parameterTypes_offset; 4026 int java_lang_reflect_Method::exceptionTypes_offset; 4027 int java_lang_reflect_Method::slot_offset; 4028 int java_lang_reflect_Method::modifiers_offset; 4029 int java_lang_reflect_Method::signature_offset; 4030 int java_lang_reflect_Method::annotations_offset; 4031 int java_lang_reflect_Method::parameter_annotations_offset; 4032 int java_lang_reflect_Method::annotation_default_offset; 4033 int java_lang_reflect_Constructor::clazz_offset; 4034 int java_lang_reflect_Constructor::parameterTypes_offset; 4035 int java_lang_reflect_Constructor::exceptionTypes_offset; 4036 int java_lang_reflect_Constructor::slot_offset; 4037 int java_lang_reflect_Constructor::modifiers_offset; 4038 int java_lang_reflect_Constructor::signature_offset; 4039 int java_lang_reflect_Constructor::annotations_offset; 4040 int java_lang_reflect_Constructor::parameter_annotations_offset; 4041 int java_lang_reflect_Field::clazz_offset; 4042 int java_lang_reflect_Field::name_offset; 4043 int java_lang_reflect_Field::type_offset; 4044 int java_lang_reflect_Field::slot_offset; 4045 int java_lang_reflect_Field::modifiers_offset; 4046 int java_lang_reflect_Field::signature_offset; 4047 int java_lang_reflect_Field::annotations_offset; 4048 int java_lang_reflect_Parameter::name_offset; 4049 int java_lang_reflect_Parameter::modifiers_offset; 4050 int java_lang_reflect_Parameter::index_offset; 4051 int java_lang_reflect_Parameter::executable_offset; 4052 int java_lang_boxing_object::value_offset; 4053 int java_lang_boxing_object::long_value_offset; 4054 int java_lang_ref_Reference::referent_offset; 4055 int java_lang_ref_Reference::queue_offset; 4056 int java_lang_ref_Reference::next_offset; 4057 int java_lang_ref_Reference::discovered_offset; 4058 int java_lang_ref_SoftReference::timestamp_offset; 4059 int java_lang_ref_SoftReference::static_clock_offset; 4060 int java_lang_ClassLoader::parent_offset; 4061 int java_lang_System::static_in_offset; 4062 int java_lang_System::static_out_offset; 4063 int java_lang_System::static_err_offset; 4064 int java_lang_System::static_security_offset; 4065 int java_lang_StackTraceElement::methodName_offset; 4066 int java_lang_StackTraceElement::fileName_offset; 4067 int java_lang_StackTraceElement::lineNumber_offset; 4068 int java_lang_StackTraceElement::moduleName_offset; 4069 int java_lang_StackTraceElement::moduleVersion_offset; 4070 int java_lang_StackTraceElement::classLoaderName_offset; 4071 int java_lang_StackTraceElement::declaringClass_offset; 4072 int java_lang_StackTraceElement::declaringClassObject_offset; 4073 int java_lang_StackFrameInfo::_memberName_offset; 4074 int java_lang_StackFrameInfo::_bci_offset; 4075 int java_lang_StackFrameInfo::_version_offset; 4076 int java_lang_LiveStackFrameInfo::_monitors_offset; 4077 int java_lang_LiveStackFrameInfo::_locals_offset; 4078 int java_lang_LiveStackFrameInfo::_operands_offset; 4079 int java_lang_LiveStackFrameInfo::_mode_offset; 4080 int java_lang_AssertionStatusDirectives::classes_offset; 4081 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4082 int java_lang_AssertionStatusDirectives::packages_offset; 4083 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4084 int java_lang_AssertionStatusDirectives::deflt_offset; 4085 int java_nio_Buffer::_limit_offset; 4086 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4087 int reflect_ConstantPool::_oop_offset; 4088 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4089 4090 4091 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4092 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4093 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4094 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4095 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4096 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4097 macro(methodName_offset, k, "methodName", string_signature, false); \ 4098 macro(fileName_offset, k, "fileName", string_signature, false); \ 4099 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4100 4101 // Support for java_lang_StackTraceElement 4102 void java_lang_StackTraceElement::compute_offsets() { 4103 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4104 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4105 } 4106 4107 #if INCLUDE_CDS 4108 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4109 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4110 } 4111 #endif 4112 4113 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4114 element->obj_field_put(fileName_offset, value); 4115 } 4116 4117 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4118 element->obj_field_put(declaringClass_offset, value); 4119 } 4120 4121 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4122 element->obj_field_put(methodName_offset, value); 4123 } 4124 4125 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4126 element->int_field_put(lineNumber_offset, value); 4127 } 4128 4129 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4130 element->obj_field_put(moduleName_offset, value); 4131 } 4132 4133 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4134 element->obj_field_put(moduleVersion_offset, value); 4135 } 4136 4137 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4138 element->obj_field_put(classLoaderName_offset, value); 4139 } 4140 4141 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4142 element->obj_field_put(declaringClassObject_offset, value); 4143 } 4144 4145 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4146 element->short_field_put(_version_offset, value); 4147 } 4148 4149 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4150 element->int_field_put(_bci_offset, value); 4151 } 4152 4153 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4154 element->obj_field_put(_monitors_offset, value); 4155 } 4156 4157 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4158 element->obj_field_put(_locals_offset, value); 4159 } 4160 4161 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4162 element->obj_field_put(_operands_offset, value); 4163 } 4164 4165 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4166 element->int_field_put(_mode_offset, value); 4167 } 4168 4169 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4170 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4171 macro(classes_offset, k, "classes", string_array_signature, false); \ 4172 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4173 macro(packages_offset, k, "packages", string_array_signature, false); \ 4174 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4175 macro(deflt_offset, k, "deflt", bool_signature, false) 4176 4177 void java_lang_AssertionStatusDirectives::compute_offsets() { 4178 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4179 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4180 } 4181 4182 #if INCLUDE_CDS 4183 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4184 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4185 } 4186 #endif 4187 4188 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4189 o->obj_field_put(classes_offset, val); 4190 } 4191 4192 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4193 o->obj_field_put(classEnabled_offset, val); 4194 } 4195 4196 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4197 o->obj_field_put(packages_offset, val); 4198 } 4199 4200 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4201 o->obj_field_put(packageEnabled_offset, val); 4202 } 4203 4204 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4205 o->bool_field_put(deflt_offset, val); 4206 } 4207 4208 4209 // Support for intrinsification of java.nio.Buffer.checkIndex 4210 int java_nio_Buffer::limit_offset() { 4211 return _limit_offset; 4212 } 4213 4214 #define BUFFER_FIELDS_DO(macro) \ 4215 macro(_limit_offset, k, "limit", int_signature, false) 4216 4217 void java_nio_Buffer::compute_offsets() { 4218 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4219 assert(k != NULL, "must be loaded in 1.4+"); 4220 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4221 } 4222 4223 #if INCLUDE_CDS 4224 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4225 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4226 } 4227 #endif 4228 4229 #define AOS_FIELDS_DO(macro) \ 4230 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4231 4232 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4233 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4234 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4235 } 4236 4237 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4238 assert(_owner_offset != 0, "Must be initialized"); 4239 return obj->obj_field(_owner_offset); 4240 } 4241 4242 #if INCLUDE_CDS 4243 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4244 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4245 } 4246 #endif 4247 4248 static int member_offset(int hardcoded_offset) { 4249 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4250 } 4251 4252 // Compute hard-coded offsets 4253 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4254 // are not available to determine the offset_of_static_fields. 4255 void JavaClasses::compute_hard_coded_offsets() { 4256 4257 // java_lang_boxing_object 4258 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4259 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4260 4261 // java_lang_ref_Reference 4262 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4263 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4264 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4265 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4266 } 4267 4268 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4269 4270 // Compute non-hard-coded field offsets of all the classes in this file 4271 void JavaClasses::compute_offsets() { 4272 if (UseSharedSpaces) { 4273 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4274 JvmtiExport::has_early_class_hook_env()), 4275 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4276 // None of the classes used by the rest of this function can be replaced by 4277 // JMVTI ClassFileLoadHook. 4278 // We are safe to use the archived offsets, which have already been restored 4279 // by JavaClasses::serialize_offsets, without computing the offsets again. 4280 return; 4281 } 4282 4283 // We have already called the compute_offsets() of the 4284 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4285 // earlier inside SystemDictionary::resolve_well_known_classes() 4286 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4287 4288 // generated interpreter code wants to know about the offsets we just computed: 4289 AbstractAssembler::update_delayed_values(); 4290 } 4291 4292 #if INCLUDE_CDS 4293 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4294 4295 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4296 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4297 } 4298 #endif 4299 4300 4301 #ifndef PRODUCT 4302 4303 // These functions exist to assert the validity of hard-coded field offsets to guard 4304 // against changes in the class files 4305 4306 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4307 EXCEPTION_MARK; 4308 fieldDescriptor fd; 4309 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4310 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4311 InstanceKlass* ik = InstanceKlass::cast(k); 4312 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4313 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4314 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4315 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4316 return false; 4317 } 4318 if (fd.is_static()) { 4319 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4320 return false; 4321 } 4322 if (fd.offset() == hardcoded_offset ) { 4323 return true; 4324 } else { 4325 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4326 klass_name, field_name, hardcoded_offset, fd.offset()); 4327 return false; 4328 } 4329 } 4330 4331 // Check the hard-coded field offsets of all the classes in this file 4332 4333 void JavaClasses::check_offsets() { 4334 bool valid = true; 4335 4336 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4337 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4338 4339 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4340 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4341 4342 // Boxed primitive objects (java_lang_boxing_object) 4343 4344 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4345 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4346 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4347 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4348 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4349 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4350 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4351 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4352 4353 // java.lang.ref.Reference 4354 4355 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4356 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4357 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4358 // Fake field 4359 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4360 4361 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4362 } 4363 4364 #endif // PRODUCT 4365 4366 int InjectedField::compute_offset() { 4367 InstanceKlass* ik = InstanceKlass::cast(klass()); 4368 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4369 if (!may_be_java && !fs.access_flags().is_internal()) { 4370 // Only look at injected fields 4371 continue; 4372 } 4373 if (fs.name() == name() && fs.signature() == signature()) { 4374 return fs.offset(); 4375 } 4376 } 4377 ResourceMark rm; 4378 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)" : ""); 4379 #ifndef PRODUCT 4380 ik->print(); 4381 tty->print_cr("all fields:"); 4382 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4383 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4384 } 4385 #endif //PRODUCT 4386 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4387 return -1; 4388 } 4389 4390 void javaClasses_init() { 4391 JavaClasses::compute_offsets(); 4392 JavaClasses::check_offsets(); 4393 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4394 }