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 #include "utilities/utf8.hpp" 69 #if INCLUDE_JVMCI 70 #include "jvmci/jvmciJavaClasses.hpp" 71 #endif 72 73 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 74 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 75 76 #if INCLUDE_CDS 77 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 78 f->do_u4((u4*)&_##name##_offset); 79 #endif 80 81 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 82 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 83 84 InjectedField JavaClasses::_injected_fields[] = { 85 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 86 }; 87 88 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 89 return _injected_fields[id].compute_offset(); 90 } 91 92 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 93 *field_count = 0; 94 95 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 96 if (sid == vmSymbols::NO_SID) { 97 // Only well known classes can inject fields 98 return NULL; 99 } 100 101 int count = 0; 102 int start = -1; 103 104 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 105 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 106 count++; \ 107 if (start == -1) start = klass##_##name##_enum; \ 108 } 109 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 110 #undef LOOKUP_INJECTED_FIELD 111 112 if (start != -1) { 113 *field_count = count; 114 return _injected_fields + start; 115 } 116 return NULL; 117 } 118 119 120 // Helpful routine for computing field offsets at run time rather than hardcoding them 121 // Finds local fields only, including static fields. Static field offsets are from the 122 // beginning of the mirror. 123 static void compute_offset(int &dest_offset, 124 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 125 bool is_static = false) { 126 fieldDescriptor fd; 127 if (ik == NULL) { 128 ResourceMark rm; 129 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 130 vm_exit_during_initialization("Invalid layout of well-known class"); 131 } 132 133 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 134 ResourceMark rm; 135 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 136 name_symbol->as_C_string(), signature_symbol->as_C_string()); 137 #ifndef PRODUCT 138 // Prints all fields and offsets 139 Log(class) lt; 140 LogStream ls(lt.error()); 141 ik->print_on(&ls); 142 #endif //PRODUCT 143 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 144 } 145 dest_offset = fd.offset(); 146 } 147 148 // Overloading to pass name as a string. 149 static void compute_offset(int& dest_offset, InstanceKlass* ik, 150 const char* name_string, Symbol* signature_symbol, 151 bool is_static = false) { 152 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 153 if (name == NULL) { 154 ResourceMark rm; 155 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 156 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 157 } 158 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 159 } 160 161 int java_lang_String::value_offset = 0; 162 int java_lang_String::hash_offset = 0; 163 int java_lang_String::hashIsZero_offset = 0; 164 int java_lang_String::coder_offset = 0; 165 166 bool java_lang_String::initialized = false; 167 168 bool java_lang_String::is_instance(oop obj) { 169 return is_instance_inlined(obj); 170 } 171 172 #if INCLUDE_CDS 173 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 174 f->do_u4((u4*)&offset) 175 #endif 176 177 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 178 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 179 180 #define STRING_FIELDS_DO(macro) \ 181 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 182 macro(hash_offset, k, "hash", int_signature, false); \ 183 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 184 macro(coder_offset, k, "coder", byte_signature, false); 185 186 void java_lang_String::compute_offsets() { 187 if (initialized) { 188 return; 189 } 190 191 InstanceKlass* k = SystemDictionary::String_klass(); 192 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 193 194 initialized = true; 195 } 196 197 #if INCLUDE_CDS 198 void java_lang_String::serialize_offsets(SerializeClosure* f) { 199 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 200 f->do_u4((u4*)&initialized); 201 } 202 #endif 203 204 class CompactStringsFixup : public FieldClosure { 205 private: 206 bool _value; 207 208 public: 209 CompactStringsFixup(bool value) : _value(value) {} 210 211 void do_field(fieldDescriptor* fd) { 212 if (fd->name() == vmSymbols::compact_strings_name()) { 213 oop mirror = fd->field_holder()->java_mirror(); 214 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 215 assert(mirror != NULL, "String must have mirror already"); 216 mirror->bool_field_put(fd->offset(), _value); 217 } 218 } 219 }; 220 221 void java_lang_String::set_compact_strings(bool value) { 222 CompactStringsFixup fix(value); 223 SystemDictionary::String_klass()->do_local_static_fields(&fix); 224 } 225 226 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 227 assert(initialized, "Must be initialized"); 228 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 229 230 // Create the String object first, so there's a chance that the String 231 // and the char array it points to end up in the same cache line. 232 oop obj; 233 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 234 235 // Create the char array. The String object must be handlized here 236 // because GC can happen as a result of the allocation attempt. 237 Handle h_obj(THREAD, obj); 238 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 239 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 240 241 // Point the String at the char array 242 obj = h_obj(); 243 set_value(obj, buffer); 244 // No need to zero the offset, allocation zero'ed the entire String object 245 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 246 return h_obj; 247 } 248 249 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 250 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 251 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 252 typeArrayOop buffer = value(h_obj()); 253 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 254 if (is_latin1) { 255 for (int index = 0; index < length; index++) { 256 buffer->byte_at_put(index, (jbyte)unicode[index]); 257 } 258 } else { 259 for (int index = 0; index < length; index++) { 260 buffer->char_at_put(index, unicode[index]); 261 } 262 } 263 264 #ifdef ASSERT 265 { 266 ResourceMark rm; 267 char* expected = UNICODE::as_utf8(unicode, length); 268 char* actual = as_utf8_string(h_obj()); 269 if (strcmp(expected, actual) != 0) { 270 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 271 ShouldNotReachHere(); 272 } 273 } 274 #endif 275 276 return h_obj; 277 } 278 279 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 280 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 281 return h_obj(); 282 } 283 284 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 285 if (utf8_str == NULL) { 286 return Handle(); 287 } 288 bool has_multibyte, is_latin1; 289 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 290 if (!CompactStrings) { 291 has_multibyte = true; 292 is_latin1 = false; 293 } 294 295 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 296 if (length > 0) { 297 if (!has_multibyte) { 298 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 299 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 300 } else if (is_latin1) { 301 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 302 } else { 303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 304 } 305 } 306 307 #ifdef ASSERT 308 // This check is too strict because the input string is not necessarily valid UTF8. 309 // For example, it may be created with arbitrary content via jni_NewStringUTF. 310 /* 311 { 312 ResourceMark rm; 313 const char* expected = utf8_str; 314 char* actual = as_utf8_string(h_obj()); 315 if (strcmp(expected, actual) != 0) { 316 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 317 ShouldNotReachHere(); 318 } 319 } 320 */ 321 #endif 322 323 return h_obj; 324 } 325 326 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 327 Handle h_obj = create_from_str(utf8_str, CHECK_0); 328 return h_obj(); 329 } 330 331 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 332 const char* utf8_str = (char*)symbol->bytes(); 333 int utf8_len = symbol->utf8_length(); 334 335 bool has_multibyte, is_latin1; 336 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 337 if (!CompactStrings) { 338 has_multibyte = true; 339 is_latin1 = false; 340 } 341 342 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 343 if (length > 0) { 344 if (!has_multibyte) { 345 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 346 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 347 } else if (is_latin1) { 348 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 349 } else { 350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 351 } 352 } 353 354 #ifdef ASSERT 355 { 356 ResourceMark rm; 357 const char* expected = symbol->as_utf8(); 358 char* actual = as_utf8_string(h_obj()); 359 if (strncmp(expected, actual, utf8_len) != 0) { 360 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 361 ShouldNotReachHere(); 362 } 363 } 364 #endif 365 366 return h_obj; 367 } 368 369 // Converts a C string to a Java String based on current encoding 370 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 371 assert(str != NULL, "bad arguments"); 372 373 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 374 static to_java_string_fn_t _to_java_string_fn = NULL; 375 376 if (_to_java_string_fn == NULL) { 377 void *lib_handle = os::native_java_library(); 378 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 379 if (_to_java_string_fn == NULL) { 380 fatal("NewStringPlatform missing"); 381 } 382 } 383 384 jstring js = NULL; 385 { JavaThread* thread = (JavaThread*)THREAD; 386 assert(thread->is_Java_thread(), "must be java thread"); 387 HandleMark hm(thread); 388 ThreadToNativeFromVM ttn(thread); 389 js = (_to_java_string_fn)(thread->jni_environment(), str); 390 } 391 return Handle(THREAD, JNIHandles::resolve(js)); 392 } 393 394 // Converts a Java String to a native C string that can be used for 395 // native OS calls. 396 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 397 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 398 static to_platform_string_fn_t _to_platform_string_fn = NULL; 399 400 if (_to_platform_string_fn == NULL) { 401 void *lib_handle = os::native_java_library(); 402 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 403 if (_to_platform_string_fn == NULL) { 404 fatal("GetStringPlatformChars missing"); 405 } 406 } 407 408 char *native_platform_string; 409 { JavaThread* thread = (JavaThread*)THREAD; 410 assert(thread->is_Java_thread(), "must be java thread"); 411 JNIEnv *env = thread->jni_environment(); 412 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 413 bool is_copy; 414 HandleMark hm(thread); 415 ThreadToNativeFromVM ttn(thread); 416 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 417 assert(is_copy == JNI_TRUE, "is_copy value changed"); 418 JNIHandles::destroy_local(js); 419 } 420 return native_platform_string; 421 } 422 423 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 424 oop obj = java_string(); 425 // Typical usage is to convert all '/' to '.' in string. 426 typeArrayOop value = java_lang_String::value(obj); 427 int length = java_lang_String::length(obj, value); 428 bool is_latin1 = java_lang_String::is_latin1(obj); 429 430 // First check if any from_char exist 431 int index; // Declared outside, used later 432 for (index = 0; index < length; index++) { 433 jchar c = !is_latin1 ? value->char_at(index) : 434 ((jchar) value->byte_at(index)) & 0xff; 435 if (c == from_char) { 436 break; 437 } 438 } 439 if (index == length) { 440 // No from_char, so do not copy. 441 return java_string; 442 } 443 444 // Check if result string will be latin1 445 bool to_is_latin1 = false; 446 447 // Replacement char must be latin1 448 if (CompactStrings && UNICODE::is_latin1(to_char)) { 449 if (is_latin1) { 450 // Source string is latin1 as well 451 to_is_latin1 = true; 452 } else if (!UNICODE::is_latin1(from_char)) { 453 // We are replacing an UTF16 char. Scan string to 454 // check if result can be latin1 encoded. 455 to_is_latin1 = true; 456 for (index = 0; index < length; index++) { 457 jchar c = value->char_at(index); 458 if (c != from_char && !UNICODE::is_latin1(c)) { 459 to_is_latin1 = false; 460 break; 461 } 462 } 463 } 464 } 465 466 // Create new UNICODE (or byte) buffer. Must handlize value because GC 467 // may happen during String and char array creation. 468 typeArrayHandle h_value(THREAD, value); 469 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 470 typeArrayOop from_buffer = h_value(); 471 typeArrayOop to_buffer = java_lang_String::value(string()); 472 473 // Copy contents 474 for (index = 0; index < length; index++) { 475 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 476 ((jchar) from_buffer->byte_at(index)) & 0xff; 477 if (c == from_char) { 478 c = to_char; 479 } 480 if (!to_is_latin1) { 481 to_buffer->char_at_put(index, c); 482 } else { 483 to_buffer->byte_at_put(index, (jbyte) c); 484 } 485 } 486 return string; 487 } 488 489 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 490 typeArrayOop value = java_lang_String::value(java_string); 491 length = java_lang_String::length(java_string, value); 492 bool is_latin1 = java_lang_String::is_latin1(java_string); 493 494 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 495 if (result != NULL) { 496 if (!is_latin1) { 497 for (int index = 0; index < length; index++) { 498 result[index] = value->char_at(index); 499 } 500 } else { 501 for (int index = 0; index < length; index++) { 502 result[index] = ((jchar) value->byte_at(index)) & 0xff; 503 } 504 } 505 } else { 506 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 507 } 508 return result; 509 } 510 511 unsigned int java_lang_String::hash_code(oop java_string) { 512 // The hash and hashIsZero fields are subject to a benign data race, 513 // making it crucial to ensure that any observable result of the 514 // calculation in this method stays correct under any possible read of 515 // these fields. Necessary restrictions to allow this to be correct 516 // without explicit memory fences or similar concurrency primitives is 517 // that we can ever only write to one of these two fields for a given 518 // String instance, and that the computation is idempotent and derived 519 // from immutable state 520 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 521 if (java_lang_String::hash_is_set(java_string)) { 522 return java_string->int_field(hash_offset); 523 } 524 525 typeArrayOop value = java_lang_String::value(java_string); 526 int length = java_lang_String::length(java_string, value); 527 bool is_latin1 = java_lang_String::is_latin1(java_string); 528 529 unsigned int hash = 0; 530 if (length > 0) { 531 if (is_latin1) { 532 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 533 } else { 534 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 535 } 536 } 537 538 if (hash != 0) { 539 java_string->int_field_put(hash_offset, hash); 540 } else { 541 java_string->bool_field_put(hashIsZero_offset, true); 542 } 543 return hash; 544 } 545 546 char* java_lang_String::as_quoted_ascii(oop java_string) { 547 typeArrayOop value = java_lang_String::value(java_string); 548 int length = java_lang_String::length(java_string, value); 549 bool is_latin1 = java_lang_String::is_latin1(java_string); 550 551 if (length == 0) return NULL; 552 553 char* result; 554 int result_length; 555 if (!is_latin1) { 556 jchar* base = value->char_at_addr(0); 557 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 558 result = NEW_RESOURCE_ARRAY(char, result_length); 559 UNICODE::as_quoted_ascii(base, length, result, result_length); 560 } else { 561 jbyte* base = value->byte_at_addr(0); 562 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 563 result = NEW_RESOURCE_ARRAY(char, result_length); 564 UNICODE::as_quoted_ascii(base, length, result, result_length); 565 } 566 assert(result_length >= length + 1, "must not be shorter"); 567 assert(result_length == (int)strlen(result) + 1, "must match"); 568 return result; 569 } 570 571 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 572 typeArrayOop value = java_lang_String::value(java_string); 573 int length = java_lang_String::length(java_string, value); 574 bool is_latin1 = java_lang_String::is_latin1(java_string); 575 if (!is_latin1) { 576 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 577 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 578 return sym; 579 } else { 580 ResourceMark rm; 581 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 582 const char* base = UNICODE::as_utf8(position, length); 583 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 584 return sym; 585 } 586 } 587 588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 589 typeArrayOop value = java_lang_String::value(java_string); 590 int length = java_lang_String::length(java_string, value); 591 bool is_latin1 = java_lang_String::is_latin1(java_string); 592 if (!is_latin1) { 593 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 594 return SymbolTable::probe_unicode(base, length); 595 } else { 596 ResourceMark rm; 597 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 598 const char* base = UNICODE::as_utf8(position, length); 599 return SymbolTable::probe(base, length); 600 } 601 } 602 603 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 604 assert(value_equals(value, java_lang_String::value(java_string)), 605 "value must be same as java_lang_String::value(java_string)"); 606 int length = java_lang_String::length(java_string, value); 607 if (length == 0) { 608 return 0; 609 } 610 if (!java_lang_String::is_latin1(java_string)) { 611 return UNICODE::utf8_length(value->char_at_addr(0), length); 612 } else { 613 return UNICODE::utf8_length(value->byte_at_addr(0), length); 614 } 615 } 616 617 int java_lang_String::utf8_length(oop java_string) { 618 typeArrayOop value = java_lang_String::value(java_string); 619 return utf8_length(java_string, value); 620 } 621 622 char* java_lang_String::as_utf8_string(oop java_string) { 623 typeArrayOop value = java_lang_String::value(java_string); 624 int length = java_lang_String::length(java_string, value); 625 bool is_latin1 = java_lang_String::is_latin1(java_string); 626 if (!is_latin1) { 627 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 628 return UNICODE::as_utf8(position, length); 629 } else { 630 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 631 return UNICODE::as_utf8(position, length); 632 } 633 } 634 635 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 636 assert(value_equals(value, java_lang_String::value(java_string)), 637 "value must be same as java_lang_String::value(java_string)"); 638 int length = java_lang_String::length(java_string, value); 639 bool is_latin1 = java_lang_String::is_latin1(java_string); 640 if (!is_latin1) { 641 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 642 return UNICODE::as_utf8(position, length, buf, buflen); 643 } else { 644 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 645 return UNICODE::as_utf8(position, length, buf, buflen); 646 } 647 } 648 649 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 650 typeArrayOop value = java_lang_String::value(java_string); 651 return as_utf8_string(java_string, value, buf, buflen); 652 } 653 654 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 655 typeArrayOop value = java_lang_String::value(java_string); 656 bool is_latin1 = java_lang_String::is_latin1(java_string); 657 assert(start + len <= java_lang_String::length(java_string), "just checking"); 658 if (!is_latin1) { 659 jchar* position = value->char_at_addr(start); 660 return UNICODE::as_utf8(position, len); 661 } else { 662 jbyte* position = value->byte_at_addr(start); 663 return UNICODE::as_utf8(position, len); 664 } 665 } 666 667 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 668 assert(value_equals(value, java_lang_String::value(java_string)), 669 "value must be same as java_lang_String::value(java_string)"); 670 assert(start + len <= java_lang_String::length(java_string), "just checking"); 671 bool is_latin1 = java_lang_String::is_latin1(java_string); 672 if (!is_latin1) { 673 jchar* position = value->char_at_addr(start); 674 return UNICODE::as_utf8(position, len, buf, buflen); 675 } else { 676 jbyte* position = value->byte_at_addr(start); 677 return UNICODE::as_utf8(position, len, buf, buflen); 678 } 679 } 680 681 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 682 assert(java_string->klass() == SystemDictionary::String_klass(), 683 "must be java_string"); 684 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 685 int length = java_lang_String::length(java_string, value); 686 if (length != len) { 687 return false; 688 } 689 bool is_latin1 = java_lang_String::is_latin1(java_string); 690 if (!is_latin1) { 691 for (int i = 0; i < len; i++) { 692 if (value->char_at(i) != chars[i]) { 693 return false; 694 } 695 } 696 } else { 697 for (int i = 0; i < len; i++) { 698 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 699 return false; 700 } 701 } 702 } 703 return true; 704 } 705 706 bool java_lang_String::equals(oop str1, oop str2) { 707 assert(str1->klass() == SystemDictionary::String_klass(), 708 "must be java String"); 709 assert(str2->klass() == SystemDictionary::String_klass(), 710 "must be java String"); 711 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 712 bool is_latin1 = java_lang_String::is_latin1(str1); 713 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 714 bool is_latin2 = java_lang_String::is_latin1(str2); 715 716 if (is_latin1 != is_latin2) { 717 // Strings with different coders are never equal. 718 return false; 719 } 720 return value_equals(value1, value2); 721 } 722 723 void java_lang_String::print(oop java_string, outputStream* st) { 724 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 725 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 726 727 if (value == NULL) { 728 // This can happen if, e.g., printing a String 729 // object before its initializer has been called 730 st->print("NULL"); 731 return; 732 } 733 734 int length = java_lang_String::length(java_string, value); 735 bool is_latin1 = java_lang_String::is_latin1(java_string); 736 737 st->print("\""); 738 for (int index = 0; index < length; index++) { 739 st->print("%c", (!is_latin1) ? value->char_at(index) : 740 ((jchar) value->byte_at(index)) & 0xff ); 741 } 742 st->print("\""); 743 } 744 745 746 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 747 assert(mirror.not_null() && fd->is_static(), "just checking"); 748 if (fd->has_initial_value()) { 749 BasicType t = fd->field_type(); 750 switch (t) { 751 case T_BYTE: 752 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 753 break; 754 case T_BOOLEAN: 755 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 756 break; 757 case T_CHAR: 758 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 759 break; 760 case T_SHORT: 761 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 762 break; 763 case T_INT: 764 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 765 break; 766 case T_FLOAT: 767 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 768 break; 769 case T_DOUBLE: 770 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 771 break; 772 case T_LONG: 773 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 774 break; 775 case T_OBJECT: 776 { 777 assert(fd->signature() == vmSymbols::string_signature(), 778 "just checking"); 779 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 780 // Archive the String field and update the pointer. 781 oop s = mirror()->obj_field(fd->offset()); 782 oop archived_s = StringTable::create_archived_string(s, CHECK); 783 mirror()->obj_field_put(fd->offset(), archived_s); 784 } else { 785 oop string = fd->string_initial_value(CHECK); 786 mirror()->obj_field_put(fd->offset(), string); 787 } 788 } 789 break; 790 default: 791 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 792 "Illegal ConstantValue attribute in class file"); 793 } 794 } 795 } 796 797 798 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 799 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 800 801 // If the offset was read from the shared archive, it was fixed up already 802 if (!k->is_shared()) { 803 if (k->is_instance_klass()) { 804 // During bootstrap, java.lang.Class wasn't loaded so static field 805 // offsets were computed without the size added it. Go back and 806 // update all the static field offsets to included the size. 807 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 808 if (fs.access_flags().is_static()) { 809 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 810 fs.set_offset(real_offset); 811 } 812 } 813 } 814 } 815 816 if (k->is_shared() && k->has_raw_archived_mirror()) { 817 if (HeapShared::open_archive_heap_region_mapped()) { 818 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 819 assert(present, "Missing archived mirror for %s", k->external_name()); 820 return; 821 } else { 822 k->set_java_mirror_handle(NULL); 823 k->clear_has_raw_archived_mirror(); 824 } 825 } 826 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 827 } 828 829 void java_lang_Class::initialize_mirror_fields(Klass* k, 830 Handle mirror, 831 Handle protection_domain, 832 TRAPS) { 833 // Allocate a simple java object for a lock. 834 // This needs to be a java object because during class initialization 835 // it can be held across a java call. 836 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 837 set_init_lock(mirror(), r); 838 839 // Set protection domain also 840 set_protection_domain(mirror(), protection_domain()); 841 842 // Initialize static fields 843 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 844 } 845 846 // Set the java.lang.Module module field in the java_lang_Class mirror 847 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 848 if (module.is_null()) { 849 // During startup, the module may be NULL only if java.base has not been defined yet. 850 // Put the class on the fixup_module_list to patch later when the java.lang.Module 851 // for java.base is known. But note that since we captured the NULL module another 852 // thread may have completed that initialization. 853 854 bool javabase_was_defined = false; 855 { 856 MutexLocker m1(Module_lock, THREAD); 857 // Keep list of classes needing java.base module fixup 858 if (!ModuleEntryTable::javabase_defined()) { 859 assert(k->java_mirror() != NULL, "Class's mirror is null"); 860 k->class_loader_data()->inc_keep_alive(); 861 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 862 fixup_module_field_list()->push(k); 863 } else { 864 javabase_was_defined = true; 865 } 866 } 867 868 // If java.base was already defined then patch this particular class with java.base. 869 if (javabase_was_defined) { 870 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 871 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 872 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 873 Handle javabase_handle(THREAD, javabase_entry->module()); 874 set_module(mirror(), javabase_handle()); 875 } 876 } else { 877 assert(Universe::is_module_initialized() || 878 (ModuleEntryTable::javabase_defined() && 879 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 880 "Incorrect java.lang.Module specification while creating mirror"); 881 set_module(mirror(), module()); 882 } 883 } 884 885 // Statically allocate fixup lists because they always get created. 886 void java_lang_Class::allocate_fixup_lists() { 887 GrowableArray<Klass*>* mirror_list = 888 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 889 set_fixup_mirror_list(mirror_list); 890 891 GrowableArray<Klass*>* module_list = 892 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 893 set_fixup_module_field_list(module_list); 894 } 895 896 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 897 Handle module, Handle protection_domain, TRAPS) { 898 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 899 assert(k->java_mirror() == NULL, "should only assign mirror once"); 900 901 // Use this moment of initialization to cache modifier_flags also, 902 // to support Class.getModifiers(). Instance classes recalculate 903 // the cached flags after the class file is parsed, but before the 904 // class is put into the system dictionary. 905 int computed_modifiers = k->compute_modifier_flags(CHECK); 906 k->set_modifier_flags(computed_modifiers); 907 // Class_klass has to be loaded because it is used to allocate 908 // the mirror. 909 if (SystemDictionary::Class_klass_loaded()) { 910 // Allocate mirror (java.lang.Class instance) 911 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 912 Handle mirror(THREAD, mirror_oop); 913 Handle comp_mirror; 914 915 // Setup indirection from mirror->klass 916 java_lang_Class::set_klass(mirror(), k); 917 918 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 919 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 920 921 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 922 923 // It might also have a component mirror. This mirror must already exist. 924 if (k->is_array_klass()) { 925 if (k->is_typeArray_klass()) { 926 BasicType type = TypeArrayKlass::cast(k)->element_type(); 927 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 928 } else { 929 assert(k->is_objArray_klass(), "Must be"); 930 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 931 assert(element_klass != NULL, "Must have an element klass"); 932 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 933 } 934 assert(comp_mirror() != NULL, "must have a mirror"); 935 936 // Two-way link between the array klass and its component mirror: 937 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 938 set_component_mirror(mirror(), comp_mirror()); 939 // See below for ordering dependencies between field array_klass in component mirror 940 // and java_mirror in this klass. 941 } else { 942 assert(k->is_instance_klass(), "Must be"); 943 944 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 945 if (HAS_PENDING_EXCEPTION) { 946 // If any of the fields throws an exception like OOM remove the klass field 947 // from the mirror so GC doesn't follow it after the klass has been deallocated. 948 // This mirror looks like a primitive type, which logically it is because it 949 // it represents no class. 950 java_lang_Class::set_klass(mirror(), NULL); 951 return; 952 } 953 } 954 955 // set the classLoader field in the java_lang_Class instance 956 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 957 set_class_loader(mirror(), class_loader()); 958 959 // Setup indirection from klass->mirror 960 // after any exceptions can happen during allocations. 961 k->set_java_mirror(mirror); 962 963 // Set the module field in the java_lang_Class instance. This must be done 964 // after the mirror is set. 965 set_mirror_module_field(k, mirror, module, THREAD); 966 967 if (comp_mirror() != NULL) { 968 // Set after k->java_mirror() is published, because compiled code running 969 // concurrently doesn't expect a k to have a null java_mirror. 970 release_set_array_klass(comp_mirror(), k); 971 } 972 } else { 973 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 974 fixup_mirror_list()->push(k); 975 } 976 } 977 978 #if INCLUDE_CDS_JAVA_HEAP 979 // Clears mirror fields. Static final fields with initial values are reloaded 980 // from constant pool. The object identity hash is in the object header and is 981 // not affected. 982 class ResetMirrorField: public FieldClosure { 983 private: 984 Handle _m; 985 986 public: 987 ResetMirrorField(Handle mirror) : _m(mirror) {} 988 989 void do_field(fieldDescriptor* fd) { 990 assert(DumpSharedSpaces, "dump time only"); 991 assert(_m.not_null(), "Mirror cannot be NULL"); 992 993 if (fd->is_static() && fd->has_initial_value()) { 994 initialize_static_field(fd, _m, Thread::current()); 995 return; 996 } 997 998 BasicType ft = fd->field_type(); 999 switch (ft) { 1000 case T_BYTE: 1001 _m()->byte_field_put(fd->offset(), 0); 1002 break; 1003 case T_CHAR: 1004 _m()->char_field_put(fd->offset(), 0); 1005 break; 1006 case T_DOUBLE: 1007 _m()->double_field_put(fd->offset(), 0); 1008 break; 1009 case T_FLOAT: 1010 _m()->float_field_put(fd->offset(), 0); 1011 break; 1012 case T_INT: 1013 _m()->int_field_put(fd->offset(), 0); 1014 break; 1015 case T_LONG: 1016 _m()->long_field_put(fd->offset(), 0); 1017 break; 1018 case T_SHORT: 1019 _m()->short_field_put(fd->offset(), 0); 1020 break; 1021 case T_BOOLEAN: 1022 _m()->bool_field_put(fd->offset(), false); 1023 break; 1024 case T_ARRAY: 1025 case T_OBJECT: { 1026 // It might be useful to cache the String field, but 1027 // for now just clear out any reference field 1028 oop o = _m()->obj_field(fd->offset()); 1029 _m()->obj_field_put(fd->offset(), NULL); 1030 break; 1031 } 1032 default: 1033 ShouldNotReachHere(); 1034 break; 1035 } 1036 } 1037 }; 1038 1039 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1040 assert(HeapShared::is_heap_object_archiving_allowed(), 1041 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1042 1043 for (int t = 0; t <= T_VOID; t++) { 1044 oop m = Universe::_mirrors[t]; 1045 if (m != NULL) { 1046 // Update the field at _array_klass_offset to point to the relocated array klass. 1047 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1048 assert(archived_m != NULL, "sanity"); 1049 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1050 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1051 if (ak != NULL) { 1052 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1053 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1054 } 1055 1056 // Clear the fields. Just to be safe 1057 Klass *k = m->klass(); 1058 Handle archived_mirror_h(THREAD, archived_m); 1059 ResetMirrorField reset(archived_mirror_h); 1060 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1061 1062 log_trace(cds, heap, mirror)( 1063 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1064 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1065 1066 Universe::_mirrors[t] = archived_m; 1067 } 1068 } 1069 1070 assert(Universe::_mirrors[T_INT] != NULL && 1071 Universe::_mirrors[T_FLOAT] != NULL && 1072 Universe::_mirrors[T_DOUBLE] != NULL && 1073 Universe::_mirrors[T_BYTE] != NULL && 1074 Universe::_mirrors[T_BOOLEAN] != NULL && 1075 Universe::_mirrors[T_CHAR] != NULL && 1076 Universe::_mirrors[T_LONG] != NULL && 1077 Universe::_mirrors[T_SHORT] != NULL && 1078 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1079 1080 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1081 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1082 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1083 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1084 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1085 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1086 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1087 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1088 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1089 } 1090 1091 // 1092 // After the mirror object is successfully archived, the archived 1093 // klass is set with _has_archived_raw_mirror flag. 1094 // 1095 // The _has_archived_raw_mirror flag is cleared at runtime when the 1096 // archived mirror is restored. If archived java heap data cannot 1097 // be used at runtime, new mirror object is created for the shared 1098 // class. The _has_archived_raw_mirror is cleared also during the process. 1099 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1100 assert(HeapShared::is_heap_object_archiving_allowed(), 1101 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1102 1103 // Mirror is already archived 1104 if (k->has_raw_archived_mirror()) { 1105 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1106 return k->archived_java_mirror_raw(); 1107 } 1108 1109 // No mirror 1110 oop mirror = k->java_mirror(); 1111 if (mirror == NULL) { 1112 return NULL; 1113 } 1114 1115 if (k->is_instance_klass()) { 1116 InstanceKlass *ik = InstanceKlass::cast(k); 1117 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1118 1119 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1120 ik->is_shared_app_class())) { 1121 // Archiving mirror for classes from non-builtin loaders is not 1122 // supported. Clear the _java_mirror within the archived class. 1123 k->set_java_mirror_handle(NULL); 1124 return NULL; 1125 } 1126 } 1127 1128 // Now start archiving the mirror object 1129 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1130 if (archived_mirror == NULL) { 1131 return NULL; 1132 } 1133 1134 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1135 if (archived_mirror == NULL) { 1136 return NULL; 1137 } 1138 1139 k->set_archived_java_mirror_raw(archived_mirror); 1140 1141 k->set_has_raw_archived_mirror(); 1142 1143 ResourceMark rm; 1144 log_trace(cds, heap, mirror)( 1145 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1146 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1147 1148 return archived_mirror; 1149 } 1150 1151 // The process is based on create_mirror(). 1152 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1153 oop archived_mirror, 1154 Thread *THREAD) { 1155 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1156 // to archived metadata and objects below. 1157 Klass *c = archived_mirror->klass(); 1158 Handle archived_mirror_h(THREAD, archived_mirror); 1159 ResetMirrorField reset(archived_mirror_h); 1160 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1161 1162 if (k->is_array_klass()) { 1163 oop archived_comp_mirror; 1164 if (k->is_typeArray_klass()) { 1165 // The primitive type mirrors are already archived. Get the archived mirror. 1166 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1167 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1168 assert(archived_comp_mirror != NULL, "Must be"); 1169 } else { 1170 assert(k->is_objArray_klass(), "Must be"); 1171 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1172 assert(element_klass != NULL, "Must have an element klass"); 1173 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1174 if (archived_comp_mirror == NULL) { 1175 return NULL; 1176 } 1177 } 1178 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1179 } else { 1180 assert(k->is_instance_klass(), "Must be"); 1181 1182 // Reset local static fields in the mirror 1183 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1184 1185 java_lang_Class:set_init_lock(archived_mirror, NULL); 1186 1187 set_protection_domain(archived_mirror, NULL); 1188 } 1189 1190 // clear class loader and mirror_module_field 1191 set_class_loader(archived_mirror, NULL); 1192 set_module(archived_mirror, NULL); 1193 1194 // The archived mirror's field at _klass_offset is still pointing to the original 1195 // klass. Updated the field in the archived mirror to point to the relocated 1196 // klass in the archive. 1197 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1198 log_debug(cds, heap, mirror)( 1199 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1200 p2i(as_Klass(mirror)), p2i(reloc_k)); 1201 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1202 1203 // The field at _array_klass_offset is pointing to the original one dimension 1204 // higher array klass if exists. Relocate the pointer. 1205 Klass *arr = array_klass_acquire(mirror); 1206 if (arr != NULL) { 1207 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1208 log_debug(cds, heap, mirror)( 1209 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1210 p2i(arr), p2i(reloc_arr)); 1211 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1212 } 1213 return archived_mirror; 1214 } 1215 1216 // Returns true if the mirror is updated, false if no archived mirror 1217 // data is present. After the archived mirror object is restored, the 1218 // shared klass' _has_raw_archived_mirror flag is cleared. 1219 bool java_lang_Class::restore_archived_mirror(Klass *k, 1220 Handle class_loader, Handle module, 1221 Handle protection_domain, TRAPS) { 1222 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1223 // see more details in SystemDictionary::resolve_well_known_classes(). 1224 if (!SystemDictionary::Class_klass_loaded()) { 1225 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1226 fixup_mirror_list()->push(k); 1227 return true; 1228 } 1229 1230 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1231 1232 if (m == NULL) { 1233 return false; 1234 } 1235 1236 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1237 1238 // mirror is archived, restore 1239 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1240 Handle mirror(THREAD, m); 1241 1242 if (!k->is_array_klass()) { 1243 // - local static final fields with initial values were initialized at dump time 1244 1245 // create the init_lock 1246 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1247 set_init_lock(mirror(), r); 1248 1249 if (protection_domain.not_null()) { 1250 set_protection_domain(mirror(), protection_domain()); 1251 } 1252 } 1253 1254 assert(class_loader() == k->class_loader(), "should be same"); 1255 if (class_loader.not_null()) { 1256 set_class_loader(mirror(), class_loader()); 1257 } 1258 1259 k->set_java_mirror(mirror); 1260 k->clear_has_raw_archived_mirror(); 1261 1262 set_mirror_module_field(k, mirror, module, THREAD); 1263 1264 ResourceMark rm; 1265 log_trace(cds, heap, mirror)( 1266 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1267 1268 return true; 1269 } 1270 #endif // INCLUDE_CDS_JAVA_HEAP 1271 1272 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1273 assert(_module_offset != 0, "must have been computed already"); 1274 java_lang_Class::set_module(k->java_mirror(), module()); 1275 } 1276 1277 int java_lang_Class::oop_size(oop java_class) { 1278 assert(_oop_size_offset != 0, "must be set"); 1279 int size = java_class->int_field(_oop_size_offset); 1280 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1281 return size; 1282 } 1283 1284 1285 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1286 assert(_oop_size_offset != 0, "must be set"); 1287 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1288 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1289 } 1290 1291 int java_lang_Class::static_oop_field_count(oop java_class) { 1292 assert(_static_oop_field_count_offset != 0, "must be set"); 1293 return java_class->int_field(_static_oop_field_count_offset); 1294 } 1295 1296 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1297 assert(_static_oop_field_count_offset != 0, "must be set"); 1298 return java_class->int_field_raw(_static_oop_field_count_offset); 1299 } 1300 1301 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1302 assert(_static_oop_field_count_offset != 0, "must be set"); 1303 java_class->int_field_put(_static_oop_field_count_offset, size); 1304 } 1305 1306 oop java_lang_Class::protection_domain(oop java_class) { 1307 assert(_protection_domain_offset != 0, "must be set"); 1308 return java_class->obj_field(_protection_domain_offset); 1309 } 1310 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1311 assert(_protection_domain_offset != 0, "must be set"); 1312 java_class->obj_field_put(_protection_domain_offset, pd); 1313 } 1314 1315 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1316 assert(_component_mirror_offset != 0, "must be set"); 1317 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1318 } 1319 oop java_lang_Class::component_mirror(oop java_class) { 1320 assert(_component_mirror_offset != 0, "must be set"); 1321 return java_class->obj_field(_component_mirror_offset); 1322 } 1323 1324 oop java_lang_Class::init_lock(oop java_class) { 1325 assert(_init_lock_offset != 0, "must be set"); 1326 return java_class->obj_field(_init_lock_offset); 1327 } 1328 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1329 assert(_init_lock_offset != 0, "must be set"); 1330 java_class->obj_field_put(_init_lock_offset, init_lock); 1331 } 1332 1333 objArrayOop java_lang_Class::signers(oop java_class) { 1334 assert(_signers_offset != 0, "must be set"); 1335 return (objArrayOop)java_class->obj_field(_signers_offset); 1336 } 1337 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1338 assert(_signers_offset != 0, "must be set"); 1339 java_class->obj_field_put(_signers_offset, (oop)signers); 1340 } 1341 1342 1343 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1344 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1345 if (_class_loader_offset != 0) { 1346 java_class->obj_field_put(_class_loader_offset, loader); 1347 } 1348 } 1349 1350 oop java_lang_Class::class_loader(oop java_class) { 1351 assert(_class_loader_offset != 0, "must be set"); 1352 return java_class->obj_field(_class_loader_offset); 1353 } 1354 1355 oop java_lang_Class::module(oop java_class) { 1356 assert(_module_offset != 0, "must be set"); 1357 return java_class->obj_field(_module_offset); 1358 } 1359 1360 void java_lang_Class::set_module(oop java_class, oop module) { 1361 assert(_module_offset != 0, "must be set"); 1362 java_class->obj_field_put(_module_offset, module); 1363 } 1364 1365 oop java_lang_Class::name(Handle java_class, TRAPS) { 1366 assert(_name_offset != 0, "must be set"); 1367 oop o = java_class->obj_field(_name_offset); 1368 if (o == NULL) { 1369 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1370 java_class->obj_field_put(_name_offset, o); 1371 } 1372 return o; 1373 } 1374 1375 oop java_lang_Class::source_file(oop java_class) { 1376 assert(_source_file_offset != 0, "must be set"); 1377 return java_class->obj_field(_source_file_offset); 1378 } 1379 1380 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1381 assert(_source_file_offset != 0, "must be set"); 1382 java_class->obj_field_put(_source_file_offset, source_file); 1383 } 1384 1385 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1386 // This should be improved by adding a field at the Java level or by 1387 // introducing a new VM klass (see comment in ClassFileParser) 1388 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1389 if (type != T_VOID) { 1390 Klass* aklass = Universe::typeArrayKlassObj(type); 1391 assert(aklass != NULL, "correct bootstrap"); 1392 release_set_array_klass(java_class, aklass); 1393 } 1394 #ifdef ASSERT 1395 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1396 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1397 #endif 1398 return java_class; 1399 } 1400 1401 1402 Klass* java_lang_Class::as_Klass(oop java_class) { 1403 //%note memory_2 1404 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1405 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1406 assert(k == NULL || k->is_klass(), "type check"); 1407 return k; 1408 } 1409 1410 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1411 //%note memory_2 1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1413 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1414 assert(k == NULL || k->is_klass(), "type check"); 1415 return k; 1416 } 1417 1418 1419 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1420 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1421 java_class->metadata_field_put(_klass_offset, klass); 1422 } 1423 1424 1425 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1426 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1427 Symbol* name = NULL; 1428 bool is_instance = false; 1429 if (is_primitive(java_class)) { 1430 name = vmSymbols::type_signature(primitive_type(java_class)); 1431 } else { 1432 Klass* k = as_Klass(java_class); 1433 is_instance = k->is_instance_klass(); 1434 name = k->name(); 1435 } 1436 if (name == NULL) { 1437 st->print("<null>"); 1438 return; 1439 } 1440 if (is_instance) st->print("L"); 1441 st->write((char*) name->base(), (int) name->utf8_length()); 1442 if (is_instance) st->print(";"); 1443 } 1444 1445 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1446 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1447 Symbol* name; 1448 if (is_primitive(java_class)) { 1449 name = vmSymbols::type_signature(primitive_type(java_class)); 1450 // Because this can create a new symbol, the caller has to decrement 1451 // the refcount, so make adjustment here and below for symbols returned 1452 // that are not created or incremented due to a successful lookup. 1453 name->increment_refcount(); 1454 } else { 1455 Klass* k = as_Klass(java_class); 1456 if (!k->is_instance_klass()) { 1457 name = k->name(); 1458 name->increment_refcount(); 1459 } else { 1460 ResourceMark rm; 1461 const char* sigstr = k->signature_name(); 1462 int siglen = (int) strlen(sigstr); 1463 if (!intern_if_not_found) { 1464 name = SymbolTable::probe(sigstr, siglen); 1465 } else { 1466 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1467 } 1468 } 1469 } 1470 return name; 1471 } 1472 1473 // Returns the Java name for this Java mirror (Resource allocated) 1474 // See Klass::external_name(). 1475 // For primitive type Java mirrors, its type name is returned. 1476 const char* java_lang_Class::as_external_name(oop java_class) { 1477 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1478 const char* name = NULL; 1479 if (is_primitive(java_class)) { 1480 name = type2name(primitive_type(java_class)); 1481 } else { 1482 name = as_Klass(java_class)->external_name(); 1483 } 1484 if (name == NULL) { 1485 name = "<null>"; 1486 } 1487 return name; 1488 } 1489 1490 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1491 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1492 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1493 return k; 1494 } 1495 1496 1497 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1498 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1499 java_class->release_metadata_field_put(_array_klass_offset, klass); 1500 } 1501 1502 1503 BasicType java_lang_Class::primitive_type(oop java_class) { 1504 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1505 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1506 BasicType type = T_VOID; 1507 if (ak != NULL) { 1508 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1509 type = ArrayKlass::cast(ak)->element_type(); 1510 } else { 1511 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1512 } 1513 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1514 return type; 1515 } 1516 1517 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1518 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1519 if (is_primitive(java_class)) { 1520 if (reference_klass != NULL) 1521 (*reference_klass) = NULL; 1522 return primitive_type(java_class); 1523 } else { 1524 if (reference_klass != NULL) 1525 (*reference_klass) = as_Klass(java_class); 1526 return T_OBJECT; 1527 } 1528 } 1529 1530 1531 oop java_lang_Class::primitive_mirror(BasicType t) { 1532 oop mirror = Universe::java_mirror(t); 1533 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1534 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1535 return mirror; 1536 } 1537 1538 bool java_lang_Class::offsets_computed = false; 1539 int java_lang_Class::classRedefinedCount_offset = -1; 1540 1541 #define CLASS_FIELDS_DO(macro) \ 1542 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1543 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1544 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1545 macro(_module_offset, k, "module", module_signature, false); \ 1546 macro(_name_offset, k, "name", string_signature, false); \ 1547 1548 void java_lang_Class::compute_offsets() { 1549 if (offsets_computed) { 1550 return; 1551 } 1552 1553 offsets_computed = true; 1554 1555 InstanceKlass* k = SystemDictionary::Class_klass(); 1556 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1557 1558 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1559 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1560 // GC treats them the same. 1561 _init_lock_offset = _component_mirror_offset; 1562 1563 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1564 } 1565 1566 #if INCLUDE_CDS 1567 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1568 f->do_u4((u4*)&offsets_computed); 1569 f->do_u4((u4*)&_init_lock_offset); 1570 1571 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1572 1573 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1574 } 1575 #endif 1576 1577 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1578 if (classRedefinedCount_offset == -1) { 1579 // If we don't have an offset for it then just return -1 as a marker. 1580 return -1; 1581 } 1582 1583 return the_class_mirror->int_field(classRedefinedCount_offset); 1584 } 1585 1586 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1587 if (classRedefinedCount_offset == -1) { 1588 // If we don't have an offset for it then nothing to set. 1589 return; 1590 } 1591 1592 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1593 } 1594 1595 1596 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1597 // platform thread structure, and a eetop offset which was used for thread 1598 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1599 // merged, so in the HotSpot VM we just use the eetop field for the thread 1600 // instead of the privateInfo_offset. 1601 // 1602 // Note: The stackSize field is only present starting in 1.4. 1603 1604 int java_lang_Thread::_name_offset = 0; 1605 int java_lang_Thread::_group_offset = 0; 1606 int java_lang_Thread::_contextClassLoader_offset = 0; 1607 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1608 int java_lang_Thread::_priority_offset = 0; 1609 int java_lang_Thread::_eetop_offset = 0; 1610 int java_lang_Thread::_daemon_offset = 0; 1611 int java_lang_Thread::_stillborn_offset = 0; 1612 int java_lang_Thread::_stackSize_offset = 0; 1613 int java_lang_Thread::_tid_offset = 0; 1614 int java_lang_Thread::_thread_status_offset = 0; 1615 int java_lang_Thread::_park_blocker_offset = 0; 1616 int java_lang_Thread::_park_event_offset = 0 ; 1617 1618 #define THREAD_FIELDS_DO(macro) \ 1619 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1620 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1621 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1622 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1623 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1624 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1625 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1626 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1627 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1628 macro(_tid_offset, k, "tid", long_signature, false); \ 1629 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1630 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1631 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1632 1633 void java_lang_Thread::compute_offsets() { 1634 assert(_group_offset == 0, "offsets should be initialized only once"); 1635 1636 InstanceKlass* k = SystemDictionary::Thread_klass(); 1637 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1638 } 1639 1640 #if INCLUDE_CDS 1641 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1642 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1643 } 1644 #endif 1645 1646 JavaThread* java_lang_Thread::thread(oop java_thread) { 1647 return (JavaThread*)java_thread->address_field(_eetop_offset); 1648 } 1649 1650 1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1652 java_thread->address_field_put(_eetop_offset, (address)thread); 1653 } 1654 1655 1656 oop java_lang_Thread::name(oop java_thread) { 1657 return java_thread->obj_field(_name_offset); 1658 } 1659 1660 1661 void java_lang_Thread::set_name(oop java_thread, oop name) { 1662 java_thread->obj_field_put(_name_offset, name); 1663 } 1664 1665 1666 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1667 return (ThreadPriority)java_thread->int_field(_priority_offset); 1668 } 1669 1670 1671 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1672 java_thread->int_field_put(_priority_offset, priority); 1673 } 1674 1675 1676 oop java_lang_Thread::threadGroup(oop java_thread) { 1677 return java_thread->obj_field(_group_offset); 1678 } 1679 1680 1681 bool java_lang_Thread::is_stillborn(oop java_thread) { 1682 return java_thread->bool_field(_stillborn_offset) != 0; 1683 } 1684 1685 1686 // We never have reason to turn the stillborn bit off 1687 void java_lang_Thread::set_stillborn(oop java_thread) { 1688 java_thread->bool_field_put(_stillborn_offset, true); 1689 } 1690 1691 1692 bool java_lang_Thread::is_alive(oop java_thread) { 1693 JavaThread* thr = java_lang_Thread::thread(java_thread); 1694 return (thr != NULL); 1695 } 1696 1697 1698 bool java_lang_Thread::is_daemon(oop java_thread) { 1699 return java_thread->bool_field(_daemon_offset) != 0; 1700 } 1701 1702 1703 void java_lang_Thread::set_daemon(oop java_thread) { 1704 java_thread->bool_field_put(_daemon_offset, true); 1705 } 1706 1707 oop java_lang_Thread::context_class_loader(oop java_thread) { 1708 return java_thread->obj_field(_contextClassLoader_offset); 1709 } 1710 1711 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1712 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1713 } 1714 1715 1716 jlong java_lang_Thread::stackSize(oop java_thread) { 1717 if (_stackSize_offset > 0) { 1718 return java_thread->long_field(_stackSize_offset); 1719 } else { 1720 return 0; 1721 } 1722 } 1723 1724 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1725 void java_lang_Thread::set_thread_status(oop java_thread, 1726 java_lang_Thread::ThreadStatus status) { 1727 // The threadStatus is only present starting in 1.5 1728 if (_thread_status_offset > 0) { 1729 java_thread->int_field_put(_thread_status_offset, status); 1730 } 1731 } 1732 1733 // Read thread status value from threadStatus field in java.lang.Thread java class. 1734 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1735 // Make sure the caller is operating on behalf of the VM or is 1736 // running VM code (state == _thread_in_vm). 1737 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1738 JavaThread::current()->thread_state() == _thread_in_vm, 1739 "Java Thread is not running in vm"); 1740 // The threadStatus is only present starting in 1.5 1741 if (_thread_status_offset > 0) { 1742 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1743 } else { 1744 // All we can easily figure out is if it is alive, but that is 1745 // enough info for a valid unknown status. 1746 // These aren't restricted to valid set ThreadStatus values, so 1747 // use JVMTI values and cast. 1748 JavaThread* thr = java_lang_Thread::thread(java_thread); 1749 if (thr == NULL) { 1750 // the thread hasn't run yet or is in the process of exiting 1751 return NEW; 1752 } 1753 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1754 } 1755 } 1756 1757 1758 jlong java_lang_Thread::thread_id(oop java_thread) { 1759 // The thread ID field is only present starting in 1.5 1760 if (_tid_offset > 0) { 1761 return java_thread->long_field(_tid_offset); 1762 } else { 1763 return 0; 1764 } 1765 } 1766 1767 oop java_lang_Thread::park_blocker(oop java_thread) { 1768 assert(JDK_Version::current().supports_thread_park_blocker() && 1769 _park_blocker_offset != 0, "Must support parkBlocker field"); 1770 1771 if (_park_blocker_offset > 0) { 1772 return java_thread->obj_field(_park_blocker_offset); 1773 } 1774 1775 return NULL; 1776 } 1777 1778 jlong java_lang_Thread::park_event(oop java_thread) { 1779 if (_park_event_offset > 0) { 1780 return java_thread->long_field(_park_event_offset); 1781 } 1782 return 0; 1783 } 1784 1785 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1786 if (_park_event_offset > 0) { 1787 java_thread->long_field_put(_park_event_offset, ptr); 1788 return true; 1789 } 1790 return false; 1791 } 1792 1793 1794 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1795 assert(_thread_status_offset != 0, "Must have thread status"); 1796 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1797 switch (status) { 1798 case NEW : return "NEW"; 1799 case RUNNABLE : return "RUNNABLE"; 1800 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1801 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1802 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1803 case PARKED : return "WAITING (parking)"; 1804 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1805 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1806 case TERMINATED : return "TERMINATED"; 1807 default : return "UNKNOWN"; 1808 }; 1809 } 1810 int java_lang_ThreadGroup::_parent_offset = 0; 1811 int java_lang_ThreadGroup::_name_offset = 0; 1812 int java_lang_ThreadGroup::_threads_offset = 0; 1813 int java_lang_ThreadGroup::_groups_offset = 0; 1814 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1815 int java_lang_ThreadGroup::_destroyed_offset = 0; 1816 int java_lang_ThreadGroup::_daemon_offset = 0; 1817 int java_lang_ThreadGroup::_nthreads_offset = 0; 1818 int java_lang_ThreadGroup::_ngroups_offset = 0; 1819 1820 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1821 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1822 return java_thread_group->obj_field(_parent_offset); 1823 } 1824 1825 // ("name as oop" accessor is not necessary) 1826 1827 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1828 oop name = java_thread_group->obj_field(_name_offset); 1829 // ThreadGroup.name can be null 1830 if (name != NULL) { 1831 return java_lang_String::as_utf8_string(name); 1832 } 1833 return NULL; 1834 } 1835 1836 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1838 return java_thread_group->int_field(_nthreads_offset); 1839 } 1840 1841 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1842 oop threads = java_thread_group->obj_field(_threads_offset); 1843 assert(threads != NULL, "threadgroups should have threads"); 1844 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1845 return objArrayOop(threads); 1846 } 1847 1848 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1849 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1850 return java_thread_group->int_field(_ngroups_offset); 1851 } 1852 1853 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1854 oop groups = java_thread_group->obj_field(_groups_offset); 1855 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1856 return objArrayOop(groups); 1857 } 1858 1859 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1860 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1861 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1862 } 1863 1864 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1865 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1866 return java_thread_group->bool_field(_destroyed_offset) != 0; 1867 } 1868 1869 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1870 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1871 return java_thread_group->bool_field(_daemon_offset) != 0; 1872 } 1873 1874 #define THREADGROUP_FIELDS_DO(macro) \ 1875 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1876 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1877 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1878 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1879 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1880 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1881 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1882 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1883 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1884 1885 void java_lang_ThreadGroup::compute_offsets() { 1886 assert(_parent_offset == 0, "offsets should be initialized only once"); 1887 1888 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1889 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1890 } 1891 1892 #if INCLUDE_CDS 1893 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1894 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1895 } 1896 #endif 1897 1898 #define THROWABLE_FIELDS_DO(macro) \ 1899 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1900 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1901 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1902 macro(depth_offset, k, "depth", int_signature, false); \ 1903 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1904 1905 void java_lang_Throwable::compute_offsets() { 1906 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1907 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1908 } 1909 1910 #if INCLUDE_CDS 1911 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1912 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1913 } 1914 #endif 1915 1916 oop java_lang_Throwable::unassigned_stacktrace() { 1917 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1918 oop base = ik->static_field_base_raw(); 1919 return base->obj_field(static_unassigned_stacktrace_offset); 1920 } 1921 1922 oop java_lang_Throwable::backtrace(oop throwable) { 1923 return throwable->obj_field_acquire(backtrace_offset); 1924 } 1925 1926 1927 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1928 throwable->release_obj_field_put(backtrace_offset, value); 1929 } 1930 1931 int java_lang_Throwable::depth(oop throwable) { 1932 return throwable->int_field(depth_offset); 1933 } 1934 1935 void java_lang_Throwable::set_depth(oop throwable, int value) { 1936 throwable->int_field_put(depth_offset, value); 1937 } 1938 1939 oop java_lang_Throwable::message(oop throwable) { 1940 return throwable->obj_field(detailMessage_offset); 1941 } 1942 1943 1944 // Return Symbol for detailed_message or NULL 1945 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1946 PRESERVE_EXCEPTION_MARK; // Keep original exception 1947 oop detailed_message = java_lang_Throwable::message(throwable); 1948 if (detailed_message != NULL) { 1949 return java_lang_String::as_symbol(detailed_message, THREAD); 1950 } 1951 return NULL; 1952 } 1953 1954 void java_lang_Throwable::set_message(oop throwable, oop value) { 1955 throwable->obj_field_put(detailMessage_offset, value); 1956 } 1957 1958 1959 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1960 throwable->obj_field_put(stackTrace_offset, st_element_array); 1961 } 1962 1963 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1964 set_stacktrace(throwable, NULL); 1965 } 1966 1967 1968 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1969 ResourceMark rm; 1970 Klass* k = throwable->klass(); 1971 assert(k != NULL, "just checking"); 1972 st->print("%s", k->external_name()); 1973 oop msg = message(throwable); 1974 if (msg != NULL) { 1975 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1976 } 1977 } 1978 1979 // After this many redefines, the stack trace is unreliable. 1980 const int MAX_VERSION = USHRT_MAX; 1981 1982 static inline bool version_matches(Method* method, int version) { 1983 assert(version < MAX_VERSION, "version is too big"); 1984 return method != NULL && (method->constants()->version() == version); 1985 } 1986 1987 1988 // This class provides a simple wrapper over the internal structure of 1989 // exception backtrace to insulate users of the backtrace from needing 1990 // to know what it looks like. 1991 class BacktraceBuilder: public StackObj { 1992 friend class BacktraceIterator; 1993 private: 1994 Handle _backtrace; 1995 objArrayOop _head; 1996 typeArrayOop _methods; 1997 typeArrayOop _bcis; 1998 objArrayOop _mirrors; 1999 typeArrayOop _names; // needed to insulate method name against redefinition 2000 int _index; 2001 NoSafepointVerifier _nsv; 2002 2003 enum { 2004 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2005 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2006 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2007 trace_names_offset = java_lang_Throwable::trace_names_offset, 2008 trace_next_offset = java_lang_Throwable::trace_next_offset, 2009 trace_size = java_lang_Throwable::trace_size, 2010 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2011 }; 2012 2013 // get info out of chunks 2014 static typeArrayOop get_methods(objArrayHandle chunk) { 2015 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2016 assert(methods != NULL, "method array should be initialized in backtrace"); 2017 return methods; 2018 } 2019 static typeArrayOop get_bcis(objArrayHandle chunk) { 2020 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2021 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2022 return bcis; 2023 } 2024 static objArrayOop get_mirrors(objArrayHandle chunk) { 2025 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2026 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2027 return mirrors; 2028 } 2029 static typeArrayOop get_names(objArrayHandle chunk) { 2030 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2031 assert(names != NULL, "names array should be initialized in backtrace"); 2032 return names; 2033 } 2034 2035 public: 2036 2037 // constructor for new backtrace 2038 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2039 expand(CHECK); 2040 _backtrace = Handle(THREAD, _head); 2041 _index = 0; 2042 } 2043 2044 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2045 _methods = get_methods(backtrace); 2046 _bcis = get_bcis(backtrace); 2047 _mirrors = get_mirrors(backtrace); 2048 _names = get_names(backtrace); 2049 assert(_methods->length() == _bcis->length() && 2050 _methods->length() == _mirrors->length() && 2051 _mirrors->length() == _names->length(), 2052 "method and source information arrays should match"); 2053 2054 // head is the preallocated backtrace 2055 _head = backtrace(); 2056 _backtrace = Handle(thread, _head); 2057 _index = 0; 2058 } 2059 2060 void expand(TRAPS) { 2061 objArrayHandle old_head(THREAD, _head); 2062 PauseNoSafepointVerifier pnsv(&_nsv); 2063 2064 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2065 objArrayHandle new_head(THREAD, head); 2066 2067 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2068 typeArrayHandle new_methods(THREAD, methods); 2069 2070 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2071 typeArrayHandle new_bcis(THREAD, bcis); 2072 2073 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2074 objArrayHandle new_mirrors(THREAD, mirrors); 2075 2076 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2077 typeArrayHandle new_names(THREAD, names); 2078 2079 if (!old_head.is_null()) { 2080 old_head->obj_at_put(trace_next_offset, new_head()); 2081 } 2082 new_head->obj_at_put(trace_methods_offset, new_methods()); 2083 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2084 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2085 new_head->obj_at_put(trace_names_offset, new_names()); 2086 2087 _head = new_head(); 2088 _methods = new_methods(); 2089 _bcis = new_bcis(); 2090 _mirrors = new_mirrors(); 2091 _names = new_names(); 2092 _index = 0; 2093 } 2094 2095 oop backtrace() { 2096 return _backtrace(); 2097 } 2098 2099 inline void push(Method* method, int bci, TRAPS) { 2100 // Smear the -1 bci to 0 since the array only holds unsigned 2101 // shorts. The later line number lookup would just smear the -1 2102 // to a 0 even if it could be recorded. 2103 if (bci == SynchronizationEntryBCI) bci = 0; 2104 2105 if (_index >= trace_chunk_size) { 2106 methodHandle mhandle(THREAD, method); 2107 expand(CHECK); 2108 method = mhandle(); 2109 } 2110 2111 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2112 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2113 2114 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2115 // klass owning the symbols alive so their refcounts aren't decremented. 2116 Symbol* name = method->name(); 2117 _names->symbol_at_put(_index, name); 2118 2119 // We need to save the mirrors in the backtrace to keep the class 2120 // from being unloaded while we still have this stack trace. 2121 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2122 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2123 _index++; 2124 } 2125 2126 }; 2127 2128 struct BacktraceElement : public StackObj { 2129 int _method_id; 2130 int _bci; 2131 int _version; 2132 Symbol* _name; 2133 Handle _mirror; 2134 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2135 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2136 }; 2137 2138 class BacktraceIterator : public StackObj { 2139 int _index; 2140 objArrayHandle _result; 2141 objArrayHandle _mirrors; 2142 typeArrayHandle _methods; 2143 typeArrayHandle _bcis; 2144 typeArrayHandle _names; 2145 2146 void init(objArrayHandle result, Thread* thread) { 2147 // Get method id, bci, version and mirror from chunk 2148 _result = result; 2149 if (_result.not_null()) { 2150 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2151 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2152 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2153 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2154 _index = 0; 2155 } 2156 } 2157 public: 2158 BacktraceIterator(objArrayHandle result, Thread* thread) { 2159 init(result, thread); 2160 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2161 } 2162 2163 BacktraceElement next(Thread* thread) { 2164 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2165 _methods->ushort_at(_index), 2166 Backtrace::version_at(_bcis->int_at(_index)), 2167 Backtrace::bci_at(_bcis->int_at(_index)), 2168 _names->symbol_at(_index)); 2169 _index++; 2170 2171 if (_index >= java_lang_Throwable::trace_chunk_size) { 2172 int next_offset = java_lang_Throwable::trace_next_offset; 2173 // Get next chunk 2174 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2175 init(result, thread); 2176 } 2177 return e; 2178 } 2179 2180 bool repeat() { 2181 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2182 } 2183 }; 2184 2185 2186 // Print stack trace element to resource allocated buffer 2187 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2188 int version, int bci, Symbol* name) { 2189 ResourceMark rm; 2190 2191 // Get strings and string lengths 2192 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2193 const char* klass_name = holder->external_name(); 2194 int buf_len = (int)strlen(klass_name); 2195 2196 char* method_name = name->as_C_string(); 2197 buf_len += (int)strlen(method_name); 2198 2199 char* source_file_name = NULL; 2200 Symbol* source = Backtrace::get_source_file_name(holder, version); 2201 if (source != NULL) { 2202 source_file_name = source->as_C_string(); 2203 buf_len += (int)strlen(source_file_name); 2204 } 2205 2206 char *module_name = NULL, *module_version = NULL; 2207 ModuleEntry* module = holder->module(); 2208 if (module->is_named()) { 2209 module_name = module->name()->as_C_string(); 2210 buf_len += (int)strlen(module_name); 2211 if (module->version() != NULL) { 2212 module_version = module->version()->as_C_string(); 2213 buf_len += (int)strlen(module_version); 2214 } 2215 } 2216 2217 // Allocate temporary buffer with extra space for formatting and line number 2218 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2219 2220 // Print stack trace line in buffer 2221 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2222 2223 // Print module information 2224 if (module_name != NULL) { 2225 if (module_version != NULL) { 2226 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2227 } else { 2228 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2229 } 2230 } 2231 2232 // The method can be NULL if the requested class version is gone 2233 Method* method = holder->method_with_orig_idnum(method_id, version); 2234 if (!version_matches(method, version)) { 2235 strcat(buf, "Redefined)"); 2236 } else { 2237 int line_number = Backtrace::get_line_number(method, bci); 2238 if (line_number == -2) { 2239 strcat(buf, "Native Method)"); 2240 } else { 2241 if (source_file_name != NULL && (line_number != -1)) { 2242 // Sourcename and linenumber 2243 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2244 } else if (source_file_name != NULL) { 2245 // Just sourcename 2246 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2247 } else { 2248 // Neither sourcename nor linenumber 2249 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2250 } 2251 CompiledMethod* nm = method->code(); 2252 if (WizardMode && nm != NULL) { 2253 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2254 } 2255 } 2256 } 2257 2258 st->print_cr("%s", buf); 2259 } 2260 2261 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2262 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2263 int method_id = method->orig_method_idnum(); 2264 int version = method->constants()->version(); 2265 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2266 } 2267 2268 /** 2269 * Print the throwable message and its stack trace plus all causes by walking the 2270 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2271 */ 2272 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2273 // First, print the message. 2274 print(throwable(), st); 2275 st->cr(); 2276 2277 // Now print the stack trace. 2278 Thread* THREAD = Thread::current(); 2279 while (throwable.not_null()) { 2280 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2281 if (result.is_null()) { 2282 st->print_raw_cr("\t<<no stack trace available>>"); 2283 return; 2284 } 2285 BacktraceIterator iter(result, THREAD); 2286 2287 while (iter.repeat()) { 2288 BacktraceElement bte = iter.next(THREAD); 2289 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2290 } 2291 { 2292 // Call getCause() which doesn't necessarily return the _cause field. 2293 EXCEPTION_MARK; 2294 JavaValue cause(T_OBJECT); 2295 JavaCalls::call_virtual(&cause, 2296 throwable, 2297 throwable->klass(), 2298 vmSymbols::getCause_name(), 2299 vmSymbols::void_throwable_signature(), 2300 THREAD); 2301 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2302 if (HAS_PENDING_EXCEPTION) { 2303 CLEAR_PENDING_EXCEPTION; 2304 throwable = Handle(); 2305 } else { 2306 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2307 if (throwable.not_null()) { 2308 st->print("Caused by: "); 2309 print(throwable(), st); 2310 st->cr(); 2311 } 2312 } 2313 } 2314 } 2315 } 2316 2317 /** 2318 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2319 */ 2320 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2321 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2322 JavaValue result(T_VOID); 2323 JavaCalls::call_virtual(&result, 2324 throwable, 2325 SystemDictionary::Throwable_klass(), 2326 vmSymbols::printStackTrace_name(), 2327 vmSymbols::void_method_signature(), 2328 THREAD); 2329 } 2330 2331 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2332 if (!StackTraceInThrowable) return; 2333 ResourceMark rm(THREAD); 2334 2335 // Start out by clearing the backtrace for this object, in case the VM 2336 // runs out of memory while allocating the stack trace 2337 set_backtrace(throwable(), NULL); 2338 // Clear lazily constructed Java level stacktrace if refilling occurs 2339 // This is unnecessary in 1.7+ but harmless 2340 clear_stacktrace(throwable()); 2341 2342 int max_depth = MaxJavaStackTraceDepth; 2343 JavaThread* thread = (JavaThread*)THREAD; 2344 2345 BacktraceBuilder bt(CHECK); 2346 2347 // If there is no Java frame just return the method that was being called 2348 // with bci 0 2349 if (!thread->has_last_Java_frame()) { 2350 if (max_depth >= 1 && method() != NULL) { 2351 bt.push(method(), 0, CHECK); 2352 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2353 set_depth(throwable(), 1); 2354 set_backtrace(throwable(), bt.backtrace()); 2355 } 2356 return; 2357 } 2358 2359 // Instead of using vframe directly, this version of fill_in_stack_trace 2360 // basically handles everything by hand. This significantly improved the 2361 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2362 // See bug 6333838 for more details. 2363 // The "ASSERT" here is to verify this method generates the exactly same stack 2364 // trace as utilizing vframe. 2365 #ifdef ASSERT 2366 vframeStream st(thread); 2367 methodHandle st_method(THREAD, st.method()); 2368 #endif 2369 int total_count = 0; 2370 RegisterMap map(thread, false); 2371 int decode_offset = 0; 2372 CompiledMethod* nm = NULL; 2373 bool skip_fillInStackTrace_check = false; 2374 bool skip_throwableInit_check = false; 2375 bool skip_hidden = !ShowHiddenFrames; 2376 2377 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2378 Method* method = NULL; 2379 int bci = 0; 2380 2381 // Compiled java method case. 2382 if (decode_offset != 0) { 2383 DebugInfoReadStream stream(nm, decode_offset); 2384 decode_offset = stream.read_int(); 2385 method = (Method*)nm->metadata_at(stream.read_int()); 2386 bci = stream.read_bci(); 2387 } else { 2388 if (fr.is_first_frame()) break; 2389 address pc = fr.pc(); 2390 if (fr.is_interpreted_frame()) { 2391 address bcp = fr.interpreter_frame_bcp(); 2392 method = fr.interpreter_frame_method(); 2393 bci = method->bci_from(bcp); 2394 fr = fr.sender(&map); 2395 } else { 2396 CodeBlob* cb = fr.cb(); 2397 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2398 // but non nmethod 2399 fr = fr.sender(&map); 2400 if (cb == NULL || !cb->is_compiled()) { 2401 continue; 2402 } 2403 nm = cb->as_compiled_method(); 2404 if (nm->method()->is_native()) { 2405 method = nm->method(); 2406 bci = 0; 2407 } else { 2408 PcDesc* pd = nm->pc_desc_at(pc); 2409 decode_offset = pd->scope_decode_offset(); 2410 // if decode_offset is not equal to 0, it will execute the 2411 // "compiled java method case" at the beginning of the loop. 2412 continue; 2413 } 2414 } 2415 } 2416 #ifdef ASSERT 2417 assert(st_method() == method && st.bci() == bci, 2418 "Wrong stack trace"); 2419 st.next(); 2420 // vframeStream::method isn't GC-safe so store off a copy 2421 // of the Method* in case we GC. 2422 if (!st.at_end()) { 2423 st_method = st.method(); 2424 } 2425 #endif 2426 2427 // the format of the stacktrace will be: 2428 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2429 // - 0 or more <init> methods for the exception class (skipped) 2430 // - rest of the stack 2431 2432 if (!skip_fillInStackTrace_check) { 2433 if (method->name() == vmSymbols::fillInStackTrace_name() && 2434 throwable->is_a(method->method_holder())) { 2435 continue; 2436 } 2437 else { 2438 skip_fillInStackTrace_check = true; // gone past them all 2439 } 2440 } 2441 if (!skip_throwableInit_check) { 2442 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2443 2444 // skip <init> methods of the exception class and superclasses 2445 // This is simlar to classic VM. 2446 if (method->name() == vmSymbols::object_initializer_name() && 2447 throwable->is_a(method->method_holder())) { 2448 continue; 2449 } else { 2450 // there are none or we've seen them all - either way stop checking 2451 skip_throwableInit_check = true; 2452 } 2453 } 2454 if (method->is_hidden()) { 2455 if (skip_hidden) continue; 2456 } 2457 bt.push(method, bci, CHECK); 2458 total_count++; 2459 } 2460 2461 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2462 2463 // Put completed stack trace into throwable object 2464 set_backtrace(throwable(), bt.backtrace()); 2465 set_depth(throwable(), total_count); 2466 } 2467 2468 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2469 // No-op if stack trace is disabled 2470 if (!StackTraceInThrowable) { 2471 return; 2472 } 2473 2474 // Disable stack traces for some preallocated out of memory errors 2475 if (!Universe::should_fill_in_stack_trace(throwable)) { 2476 return; 2477 } 2478 2479 PRESERVE_EXCEPTION_MARK; 2480 2481 JavaThread* thread = JavaThread::active(); 2482 fill_in_stack_trace(throwable, method, thread); 2483 // ignore exceptions thrown during stack trace filling 2484 CLEAR_PENDING_EXCEPTION; 2485 } 2486 2487 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2488 // Allocate stack trace - backtrace is created but not filled in 2489 2490 // No-op if stack trace is disabled 2491 if (!StackTraceInThrowable) return; 2492 BacktraceBuilder bt(CHECK); // creates a backtrace 2493 set_backtrace(throwable(), bt.backtrace()); 2494 } 2495 2496 2497 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2498 // Fill in stack trace into preallocated backtrace (no GC) 2499 2500 // No-op if stack trace is disabled 2501 if (!StackTraceInThrowable) return; 2502 2503 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2504 2505 JavaThread* THREAD = JavaThread::current(); 2506 2507 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2508 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2509 2510 ResourceMark rm(THREAD); 2511 vframeStream st(THREAD); 2512 2513 BacktraceBuilder bt(THREAD, backtrace); 2514 2515 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2516 // methods as preallocated errors aren't created by "java" code. 2517 2518 // fill in as much stack trace as possible 2519 int chunk_count = 0; 2520 for (;!st.at_end(); st.next()) { 2521 bt.push(st.method(), st.bci(), CHECK); 2522 chunk_count++; 2523 2524 // Bail-out for deep stacks 2525 if (chunk_count >= trace_chunk_size) break; 2526 } 2527 set_depth(throwable(), chunk_count); 2528 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2529 2530 // We support the Throwable immutability protocol defined for Java 7. 2531 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2532 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2533 } 2534 2535 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2536 objArrayHandle stack_trace_array_h, TRAPS) { 2537 2538 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2539 THROW(vmSymbols::java_lang_NullPointerException()); 2540 } 2541 2542 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2543 2544 if (stack_trace_array_h->length() != depth(throwable())) { 2545 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2546 } 2547 2548 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2549 BacktraceIterator iter(result, THREAD); 2550 2551 int index = 0; 2552 while (iter.repeat()) { 2553 BacktraceElement bte = iter.next(THREAD); 2554 2555 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2556 2557 if (stack_trace_element.is_null()) { 2558 THROW(vmSymbols::java_lang_NullPointerException()); 2559 } 2560 2561 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2562 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2563 2564 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2565 method, 2566 bte._version, 2567 bte._bci, 2568 bte._name, CHECK); 2569 } 2570 } 2571 2572 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2573 // Allocate java.lang.StackTraceElement instance 2574 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2575 assert(k != NULL, "must be loaded in 1.4+"); 2576 if (k->should_be_initialized()) { 2577 k->initialize(CHECK_0); 2578 } 2579 2580 Handle element = k->allocate_instance_handle(CHECK_0); 2581 2582 int version = method->constants()->version(); 2583 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2584 return element(); 2585 } 2586 2587 void java_lang_StackTraceElement::fill_in(Handle element, 2588 InstanceKlass* holder, const methodHandle& method, 2589 int version, int bci, Symbol* name, TRAPS) { 2590 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2591 2592 ResourceMark rm(THREAD); 2593 HandleMark hm(THREAD); 2594 2595 // Fill in class name 2596 Handle java_class(THREAD, holder->java_mirror()); 2597 oop classname = java_lang_Class::name(java_class, CHECK); 2598 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2599 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2600 2601 oop loader = holder->class_loader(); 2602 if (loader != NULL) { 2603 oop loader_name = java_lang_ClassLoader::name(loader); 2604 if (loader_name != NULL) 2605 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2606 } 2607 2608 // Fill in method name 2609 oop methodname = StringTable::intern(name, CHECK); 2610 java_lang_StackTraceElement::set_methodName(element(), methodname); 2611 2612 // Fill in module name and version 2613 ModuleEntry* module = holder->module(); 2614 if (module->is_named()) { 2615 oop module_name = StringTable::intern(module->name(), CHECK); 2616 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2617 oop module_version; 2618 if (module->version() != NULL) { 2619 module_version = StringTable::intern(module->version(), CHECK); 2620 } else { 2621 module_version = NULL; 2622 } 2623 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2624 } 2625 2626 if (method() == NULL || !version_matches(method(), version)) { 2627 // The method was redefined, accurate line number information isn't available 2628 java_lang_StackTraceElement::set_fileName(element(), NULL); 2629 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2630 } else { 2631 // Fill in source file name and line number. 2632 Symbol* source = Backtrace::get_source_file_name(holder, version); 2633 oop source_file = java_lang_Class::source_file(java_class()); 2634 if (source != NULL) { 2635 // Class was not redefined. We can trust its cache if set, 2636 // else we have to initialize it. 2637 if (source_file == NULL) { 2638 source_file = StringTable::intern(source, CHECK); 2639 java_lang_Class::set_source_file(java_class(), source_file); 2640 } 2641 } else { 2642 // Class was redefined. Dump the cache if it was set. 2643 if (source_file != NULL) { 2644 source_file = NULL; 2645 java_lang_Class::set_source_file(java_class(), source_file); 2646 } 2647 if (ShowHiddenFrames) { 2648 source = vmSymbols::unknown_class_name(); 2649 source_file = StringTable::intern(source, CHECK); 2650 } 2651 } 2652 java_lang_StackTraceElement::set_fileName(element(), source_file); 2653 2654 int line_number = Backtrace::get_line_number(method, bci); 2655 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2656 } 2657 } 2658 2659 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2660 HandleMark hm(THREAD); 2661 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2662 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2663 // we should expand MemberName::name when Throwable uses StackTrace 2664 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2665 return method; 2666 } 2667 2668 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2669 // set Method* or mid/cpref 2670 HandleMark hm(THREAD); 2671 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2672 InstanceKlass* ik = method->method_holder(); 2673 CallInfo info(method(), ik, CHECK); 2674 MethodHandles::init_method_MemberName(mname, info); 2675 // set bci 2676 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2677 // method may be redefined; store the version 2678 int version = method->constants()->version(); 2679 assert((jushort)version == version, "version should be short"); 2680 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2681 } 2682 2683 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2684 ResourceMark rm(THREAD); 2685 HandleMark hm(THREAD); 2686 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2687 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2688 InstanceKlass* holder = InstanceKlass::cast(clazz); 2689 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2690 2691 short version = stackFrame->short_field(_version_offset); 2692 short bci = stackFrame->short_field(_bci_offset); 2693 Symbol* name = method->name(); 2694 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2695 } 2696 2697 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2698 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2699 macro(_bci_offset, k, "bci", short_signature, false) 2700 2701 void java_lang_StackFrameInfo::compute_offsets() { 2702 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2703 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2704 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2705 } 2706 2707 #if INCLUDE_CDS 2708 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2709 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2710 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2711 } 2712 #endif 2713 2714 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2715 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2716 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2717 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2718 macro(_mode_offset, k, "mode", int_signature, false) 2719 2720 void java_lang_LiveStackFrameInfo::compute_offsets() { 2721 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2722 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2723 } 2724 2725 #if INCLUDE_CDS 2726 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2727 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2728 } 2729 #endif 2730 2731 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2732 macro(override_offset, k, "override", bool_signature, false) 2733 2734 void java_lang_reflect_AccessibleObject::compute_offsets() { 2735 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2736 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2737 } 2738 2739 #if INCLUDE_CDS 2740 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2741 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2742 } 2743 #endif 2744 2745 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2747 return (jboolean) reflect->bool_field(override_offset); 2748 } 2749 2750 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2752 reflect->bool_field_put(override_offset, (int) value); 2753 } 2754 2755 #define METHOD_FIELDS_DO(macro) \ 2756 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2757 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2758 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2759 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2760 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2761 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2762 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2763 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2764 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2765 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2766 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2767 2768 void java_lang_reflect_Method::compute_offsets() { 2769 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2770 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2771 } 2772 2773 #if INCLUDE_CDS 2774 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2775 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2776 } 2777 #endif 2778 2779 Handle java_lang_reflect_Method::create(TRAPS) { 2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2781 Klass* klass = SystemDictionary::reflect_Method_klass(); 2782 // This class is eagerly initialized during VM initialization, since we keep a refence 2783 // to one of the methods 2784 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2785 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2786 } 2787 2788 oop java_lang_reflect_Method::clazz(oop reflect) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 return reflect->obj_field(clazz_offset); 2791 } 2792 2793 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 reflect->obj_field_put(clazz_offset, value); 2796 } 2797 2798 int java_lang_reflect_Method::slot(oop reflect) { 2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2800 return reflect->int_field(slot_offset); 2801 } 2802 2803 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2805 reflect->int_field_put(slot_offset, value); 2806 } 2807 2808 void java_lang_reflect_Method::set_name(oop method, oop value) { 2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2810 method->obj_field_put(name_offset, value); 2811 } 2812 2813 oop java_lang_reflect_Method::return_type(oop method) { 2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2815 return method->obj_field(returnType_offset); 2816 } 2817 2818 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2820 method->obj_field_put(returnType_offset, value); 2821 } 2822 2823 oop java_lang_reflect_Method::parameter_types(oop method) { 2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2825 return method->obj_field(parameterTypes_offset); 2826 } 2827 2828 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2830 method->obj_field_put(parameterTypes_offset, value); 2831 } 2832 2833 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2835 method->obj_field_put(exceptionTypes_offset, value); 2836 } 2837 2838 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2840 method->int_field_put(modifiers_offset, value); 2841 } 2842 2843 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2845 method->obj_field_put(signature_offset, value); 2846 } 2847 2848 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2850 method->obj_field_put(annotations_offset, value); 2851 } 2852 2853 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2855 method->obj_field_put(parameter_annotations_offset, value); 2856 } 2857 2858 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2860 method->obj_field_put(annotation_default_offset, value); 2861 } 2862 2863 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2864 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2865 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2866 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2867 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2868 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2869 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2870 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2871 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2872 2873 void java_lang_reflect_Constructor::compute_offsets() { 2874 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2875 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2876 } 2877 2878 #if INCLUDE_CDS 2879 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2880 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2881 } 2882 #endif 2883 2884 Handle java_lang_reflect_Constructor::create(TRAPS) { 2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2886 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2887 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2888 InstanceKlass* ik = InstanceKlass::cast(k); 2889 // Ensure it is initialized 2890 ik->initialize(CHECK_NH); 2891 return ik->allocate_instance_handle(THREAD); 2892 } 2893 2894 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2896 return reflect->obj_field(clazz_offset); 2897 } 2898 2899 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2901 reflect->obj_field_put(clazz_offset, value); 2902 } 2903 2904 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2906 return constructor->obj_field(parameterTypes_offset); 2907 } 2908 2909 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2911 constructor->obj_field_put(parameterTypes_offset, value); 2912 } 2913 2914 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2916 constructor->obj_field_put(exceptionTypes_offset, value); 2917 } 2918 2919 int java_lang_reflect_Constructor::slot(oop reflect) { 2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2921 return reflect->int_field(slot_offset); 2922 } 2923 2924 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2926 reflect->int_field_put(slot_offset, value); 2927 } 2928 2929 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2931 constructor->int_field_put(modifiers_offset, value); 2932 } 2933 2934 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2936 constructor->obj_field_put(signature_offset, value); 2937 } 2938 2939 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2941 constructor->obj_field_put(annotations_offset, value); 2942 } 2943 2944 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2946 method->obj_field_put(parameter_annotations_offset, value); 2947 } 2948 2949 #define FIELD_FIELDS_DO(macro) \ 2950 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2951 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2952 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2953 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2954 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2955 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2956 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2957 2958 void java_lang_reflect_Field::compute_offsets() { 2959 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2960 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2961 } 2962 2963 #if INCLUDE_CDS 2964 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2965 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2966 } 2967 #endif 2968 2969 Handle java_lang_reflect_Field::create(TRAPS) { 2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2971 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2972 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2973 InstanceKlass* ik = InstanceKlass::cast(k); 2974 // Ensure it is initialized 2975 ik->initialize(CHECK_NH); 2976 return ik->allocate_instance_handle(THREAD); 2977 } 2978 2979 oop java_lang_reflect_Field::clazz(oop reflect) { 2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2981 return reflect->obj_field(clazz_offset); 2982 } 2983 2984 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2986 reflect->obj_field_put(clazz_offset, value); 2987 } 2988 2989 oop java_lang_reflect_Field::name(oop field) { 2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2991 return field->obj_field(name_offset); 2992 } 2993 2994 void java_lang_reflect_Field::set_name(oop field, oop value) { 2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2996 field->obj_field_put(name_offset, value); 2997 } 2998 2999 oop java_lang_reflect_Field::type(oop field) { 3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3001 return field->obj_field(type_offset); 3002 } 3003 3004 void java_lang_reflect_Field::set_type(oop field, oop value) { 3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3006 field->obj_field_put(type_offset, value); 3007 } 3008 3009 int java_lang_reflect_Field::slot(oop reflect) { 3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3011 return reflect->int_field(slot_offset); 3012 } 3013 3014 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3016 reflect->int_field_put(slot_offset, value); 3017 } 3018 3019 int java_lang_reflect_Field::modifiers(oop field) { 3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3021 return field->int_field(modifiers_offset); 3022 } 3023 3024 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3026 field->int_field_put(modifiers_offset, value); 3027 } 3028 3029 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3031 field->obj_field_put(signature_offset, value); 3032 } 3033 3034 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3036 field->obj_field_put(annotations_offset, value); 3037 } 3038 3039 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3040 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3041 3042 void reflect_ConstantPool::compute_offsets() { 3043 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3044 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3045 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3046 } 3047 3048 #if INCLUDE_CDS 3049 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3050 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3051 } 3052 #endif 3053 3054 #define PARAMETER_FIELDS_DO(macro) \ 3055 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3056 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3057 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3058 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3059 3060 void java_lang_reflect_Parameter::compute_offsets() { 3061 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3062 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3063 } 3064 3065 #if INCLUDE_CDS 3066 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3067 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3068 } 3069 #endif 3070 3071 Handle java_lang_reflect_Parameter::create(TRAPS) { 3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3073 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3074 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3075 InstanceKlass* ik = InstanceKlass::cast(k); 3076 // Ensure it is initialized 3077 ik->initialize(CHECK_NH); 3078 return ik->allocate_instance_handle(THREAD); 3079 } 3080 3081 oop java_lang_reflect_Parameter::name(oop param) { 3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3083 return param->obj_field(name_offset); 3084 } 3085 3086 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3088 param->obj_field_put(name_offset, value); 3089 } 3090 3091 int java_lang_reflect_Parameter::modifiers(oop param) { 3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3093 return param->int_field(modifiers_offset); 3094 } 3095 3096 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3098 param->int_field_put(modifiers_offset, value); 3099 } 3100 3101 int java_lang_reflect_Parameter::index(oop param) { 3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3103 return param->int_field(index_offset); 3104 } 3105 3106 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3108 param->int_field_put(index_offset, value); 3109 } 3110 3111 oop java_lang_reflect_Parameter::executable(oop param) { 3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3113 return param->obj_field(executable_offset); 3114 } 3115 3116 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3118 param->obj_field_put(executable_offset, value); 3119 } 3120 3121 3122 int java_lang_Module::loader_offset; 3123 int java_lang_Module::name_offset; 3124 int java_lang_Module::_module_entry_offset = -1; 3125 3126 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3128 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3129 vmSymbols::java_lang_module_init_signature(), 3130 loader, module_name, CHECK_NH); 3131 } 3132 3133 #define MODULE_FIELDS_DO(macro) \ 3134 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3135 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3136 3137 void java_lang_Module::compute_offsets() { 3138 InstanceKlass* k = SystemDictionary::Module_klass(); 3139 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3140 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3141 } 3142 3143 #if INCLUDE_CDS 3144 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3145 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3146 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3147 } 3148 #endif 3149 3150 oop java_lang_Module::loader(oop module) { 3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3152 return module->obj_field(loader_offset); 3153 } 3154 3155 void java_lang_Module::set_loader(oop module, oop value) { 3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3157 module->obj_field_put(loader_offset, value); 3158 } 3159 3160 oop java_lang_Module::name(oop module) { 3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3162 return module->obj_field(name_offset); 3163 } 3164 3165 void java_lang_Module::set_name(oop module, oop value) { 3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3167 module->obj_field_put(name_offset, value); 3168 } 3169 3170 ModuleEntry* java_lang_Module::module_entry(oop module) { 3171 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3172 assert(module != NULL, "module can't be null"); 3173 assert(oopDesc::is_oop(module), "module must be oop"); 3174 3175 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3176 if (module_entry == NULL) { 3177 // If the inject field containing the ModuleEntry* is null then return the 3178 // class loader's unnamed module. 3179 oop loader = java_lang_Module::loader(module); 3180 Handle h_loader = Handle(Thread::current(), loader); 3181 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3182 return loader_cld->unnamed_module(); 3183 } 3184 return module_entry; 3185 } 3186 3187 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3188 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3189 assert(module != NULL, "module can't be null"); 3190 assert(oopDesc::is_oop(module), "module must be oop"); 3191 module->address_field_put(_module_entry_offset, (address)module_entry); 3192 } 3193 3194 Handle reflect_ConstantPool::create(TRAPS) { 3195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3196 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3197 // Ensure it is initialized 3198 k->initialize(CHECK_NH); 3199 return k->allocate_instance_handle(THREAD); 3200 } 3201 3202 3203 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3205 oop mirror = value->pool_holder()->java_mirror(); 3206 // Save the mirror to get back the constant pool. 3207 reflect->obj_field_put(_oop_offset, mirror); 3208 } 3209 3210 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3212 3213 oop mirror = reflect->obj_field(_oop_offset); 3214 Klass* k = java_lang_Class::as_Klass(mirror); 3215 assert(k->is_instance_klass(), "Must be"); 3216 3217 // Get the constant pool back from the klass. Since class redefinition 3218 // merges the new constant pool into the old, this is essentially the 3219 // same constant pool as the original. If constant pool merging is 3220 // no longer done in the future, this will have to change to save 3221 // the original. 3222 return InstanceKlass::cast(k)->constants(); 3223 } 3224 3225 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3226 macro(_base_offset, k, "base", object_signature, false) 3227 3228 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3229 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3230 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3231 } 3232 3233 #if INCLUDE_CDS 3234 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3235 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3236 } 3237 #endif 3238 3239 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3240 Klass* k = SystemDictionary::box_klass(type); 3241 if (k == NULL) return NULL; 3242 InstanceKlass* ik = InstanceKlass::cast(k); 3243 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3244 return ik->allocate_instance(THREAD); 3245 } 3246 3247 3248 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3249 oop box = initialize_and_allocate(type, CHECK_0); 3250 if (box == NULL) return NULL; 3251 switch (type) { 3252 case T_BOOLEAN: 3253 box->bool_field_put(value_offset, value->z); 3254 break; 3255 case T_CHAR: 3256 box->char_field_put(value_offset, value->c); 3257 break; 3258 case T_FLOAT: 3259 box->float_field_put(value_offset, value->f); 3260 break; 3261 case T_DOUBLE: 3262 box->double_field_put(long_value_offset, value->d); 3263 break; 3264 case T_BYTE: 3265 box->byte_field_put(value_offset, value->b); 3266 break; 3267 case T_SHORT: 3268 box->short_field_put(value_offset, value->s); 3269 break; 3270 case T_INT: 3271 box->int_field_put(value_offset, value->i); 3272 break; 3273 case T_LONG: 3274 box->long_field_put(long_value_offset, value->j); 3275 break; 3276 default: 3277 return NULL; 3278 } 3279 return box; 3280 } 3281 3282 3283 BasicType java_lang_boxing_object::basic_type(oop box) { 3284 if (box == NULL) return T_ILLEGAL; 3285 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3286 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3287 return T_ILLEGAL; 3288 return type; 3289 } 3290 3291 3292 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3293 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3294 switch (type) { 3295 case T_BOOLEAN: 3296 value->z = box->bool_field(value_offset); 3297 break; 3298 case T_CHAR: 3299 value->c = box->char_field(value_offset); 3300 break; 3301 case T_FLOAT: 3302 value->f = box->float_field(value_offset); 3303 break; 3304 case T_DOUBLE: 3305 value->d = box->double_field(long_value_offset); 3306 break; 3307 case T_BYTE: 3308 value->b = box->byte_field(value_offset); 3309 break; 3310 case T_SHORT: 3311 value->s = box->short_field(value_offset); 3312 break; 3313 case T_INT: 3314 value->i = box->int_field(value_offset); 3315 break; 3316 case T_LONG: 3317 value->j = box->long_field(long_value_offset); 3318 break; 3319 default: 3320 return T_ILLEGAL; 3321 } // end switch 3322 return type; 3323 } 3324 3325 3326 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3327 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3328 switch (type) { 3329 case T_BOOLEAN: 3330 box->bool_field_put(value_offset, value->z); 3331 break; 3332 case T_CHAR: 3333 box->char_field_put(value_offset, value->c); 3334 break; 3335 case T_FLOAT: 3336 box->float_field_put(value_offset, value->f); 3337 break; 3338 case T_DOUBLE: 3339 box->double_field_put(long_value_offset, value->d); 3340 break; 3341 case T_BYTE: 3342 box->byte_field_put(value_offset, value->b); 3343 break; 3344 case T_SHORT: 3345 box->short_field_put(value_offset, value->s); 3346 break; 3347 case T_INT: 3348 box->int_field_put(value_offset, value->i); 3349 break; 3350 case T_LONG: 3351 box->long_field_put(long_value_offset, value->j); 3352 break; 3353 default: 3354 return T_ILLEGAL; 3355 } // end switch 3356 return type; 3357 } 3358 3359 3360 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3361 switch (type) { 3362 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3363 case T_CHAR: st->print("%d", value->c); break; 3364 case T_BYTE: st->print("%d", value->b); break; 3365 case T_SHORT: st->print("%d", value->s); break; 3366 case T_INT: st->print("%d", value->i); break; 3367 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3368 case T_FLOAT: st->print("%f", value->f); break; 3369 case T_DOUBLE: st->print("%lf", value->d); break; 3370 default: st->print("type %d?", type); break; 3371 } 3372 } 3373 3374 // Support for java_lang_ref_Reference 3375 3376 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3377 assert(obj != NULL, "sanity"); 3378 if (offset != java_lang_ref_Reference::referent_offset) { 3379 return false; 3380 } 3381 3382 Klass* k = obj->klass(); 3383 if (!k->is_instance_klass()) { 3384 return false; 3385 } 3386 3387 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3388 bool is_reference = ik->reference_type() != REF_NONE; 3389 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3390 return is_reference; 3391 } 3392 3393 // Support for java_lang_ref_SoftReference 3394 // 3395 3396 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3397 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3398 macro(static_clock_offset, k, "clock", long_signature, true) 3399 3400 void java_lang_ref_SoftReference::compute_offsets() { 3401 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3402 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3403 } 3404 3405 #if INCLUDE_CDS 3406 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3407 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3408 } 3409 #endif 3410 3411 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3412 return ref->long_field(timestamp_offset); 3413 } 3414 3415 jlong java_lang_ref_SoftReference::clock() { 3416 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3417 oop base = ik->static_field_base_raw(); 3418 return base->long_field(static_clock_offset); 3419 } 3420 3421 void java_lang_ref_SoftReference::set_clock(jlong value) { 3422 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3423 oop base = ik->static_field_base_raw(); 3424 base->long_field_put(static_clock_offset, value); 3425 } 3426 3427 // Support for java_lang_invoke_DirectMethodHandle 3428 3429 int java_lang_invoke_DirectMethodHandle::_member_offset; 3430 3431 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3432 oop member_name = NULL; 3433 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3434 "a DirectMethodHandle oop is expected"); 3435 return dmh->obj_field(member_offset_in_bytes()); 3436 } 3437 3438 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3439 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3440 3441 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3442 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3443 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3444 } 3445 3446 #if INCLUDE_CDS 3447 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3448 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3449 } 3450 #endif 3451 3452 // Support for java_lang_invoke_MethodHandle 3453 3454 int java_lang_invoke_MethodHandle::_type_offset; 3455 int java_lang_invoke_MethodHandle::_form_offset; 3456 3457 int java_lang_invoke_MemberName::_clazz_offset; 3458 int java_lang_invoke_MemberName::_name_offset; 3459 int java_lang_invoke_MemberName::_type_offset; 3460 int java_lang_invoke_MemberName::_flags_offset; 3461 int java_lang_invoke_MemberName::_method_offset; 3462 int java_lang_invoke_MemberName::_vmindex_offset; 3463 3464 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3465 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3466 3467 int java_lang_invoke_LambdaForm::_vmentry_offset; 3468 3469 #define METHODHANDLE_FIELDS_DO(macro) \ 3470 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3471 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3472 3473 void java_lang_invoke_MethodHandle::compute_offsets() { 3474 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3475 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3476 } 3477 3478 #if INCLUDE_CDS 3479 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3480 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3481 } 3482 #endif 3483 3484 #define MEMBERNAME_FIELDS_DO(macro) \ 3485 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3486 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3487 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3488 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3489 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3490 3491 void java_lang_invoke_MemberName::compute_offsets() { 3492 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3493 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3494 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3495 } 3496 3497 #if INCLUDE_CDS 3498 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3499 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3500 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3501 } 3502 #endif 3503 3504 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3505 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3506 assert(k != NULL, "jdk mismatch"); 3507 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3508 } 3509 3510 #if INCLUDE_CDS 3511 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3512 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3513 } 3514 #endif 3515 3516 #define LAMBDAFORM_FIELDS_DO(macro) \ 3517 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3518 3519 void java_lang_invoke_LambdaForm::compute_offsets() { 3520 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3521 assert (k != NULL, "jdk mismatch"); 3522 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3523 } 3524 3525 #if INCLUDE_CDS 3526 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3527 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3528 } 3529 #endif 3530 3531 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3532 return obj != NULL && is_subclass(obj->klass()); 3533 } 3534 3535 3536 oop java_lang_invoke_MethodHandle::type(oop mh) { 3537 return mh->obj_field(_type_offset); 3538 } 3539 3540 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3541 mh->obj_field_put(_type_offset, mtype); 3542 } 3543 3544 oop java_lang_invoke_MethodHandle::form(oop mh) { 3545 assert(_form_offset != 0, ""); 3546 return mh->obj_field(_form_offset); 3547 } 3548 3549 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3550 assert(_form_offset != 0, ""); 3551 mh->obj_field_put(_form_offset, lform); 3552 } 3553 3554 /// MemberName accessors 3555 3556 oop java_lang_invoke_MemberName::clazz(oop mname) { 3557 assert(is_instance(mname), "wrong type"); 3558 return mname->obj_field(_clazz_offset); 3559 } 3560 3561 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3562 assert(is_instance(mname), "wrong type"); 3563 mname->obj_field_put(_clazz_offset, clazz); 3564 } 3565 3566 oop java_lang_invoke_MemberName::name(oop mname) { 3567 assert(is_instance(mname), "wrong type"); 3568 return mname->obj_field(_name_offset); 3569 } 3570 3571 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3572 assert(is_instance(mname), "wrong type"); 3573 mname->obj_field_put(_name_offset, name); 3574 } 3575 3576 oop java_lang_invoke_MemberName::type(oop mname) { 3577 assert(is_instance(mname), "wrong type"); 3578 return mname->obj_field(_type_offset); 3579 } 3580 3581 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3582 assert(is_instance(mname), "wrong type"); 3583 mname->obj_field_put(_type_offset, type); 3584 } 3585 3586 int java_lang_invoke_MemberName::flags(oop mname) { 3587 assert(is_instance(mname), "wrong type"); 3588 return mname->int_field(_flags_offset); 3589 } 3590 3591 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3592 assert(is_instance(mname), "wrong type"); 3593 mname->int_field_put(_flags_offset, flags); 3594 } 3595 3596 3597 // Return vmtarget from ResolvedMethodName method field through indirection 3598 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3599 assert(is_instance(mname), "wrong type"); 3600 oop method = mname->obj_field(_method_offset); 3601 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3602 } 3603 3604 bool java_lang_invoke_MemberName::is_method(oop mname) { 3605 assert(is_instance(mname), "must be MemberName"); 3606 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3607 } 3608 3609 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3610 assert(is_instance(mname), "wrong type"); 3611 mname->obj_field_put(_method_offset, resolved_method); 3612 } 3613 3614 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3615 assert(is_instance(mname), "wrong type"); 3616 return (intptr_t) mname->address_field(_vmindex_offset); 3617 } 3618 3619 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3620 assert(is_instance(mname), "wrong type"); 3621 mname->address_field_put(_vmindex_offset, (address) index); 3622 } 3623 3624 3625 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3626 assert(is_instance(resolved_method), "wrong type"); 3627 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3628 assert(m->is_method(), "must be"); 3629 return m; 3630 } 3631 3632 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3633 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3634 assert(is_instance(resolved_method), "wrong type"); 3635 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3636 } 3637 3638 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3639 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3640 oop resolved_method = ResolvedMethodTable::find_method(m()); 3641 if (resolved_method == NULL) { 3642 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3643 if (!k->is_initialized()) { 3644 k->initialize(CHECK_NULL); 3645 } 3646 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3647 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3648 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3649 // distinct loaders) to ensure the metadata is kept alive. 3650 // This mirror may be different than the one in clazz field. 3651 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3652 resolved_method = ResolvedMethodTable::add_method(m, Handle(THREAD, new_resolved_method)); 3653 } 3654 return resolved_method; 3655 } 3656 3657 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3658 assert(is_instance(lform), "wrong type"); 3659 return lform->obj_field(_vmentry_offset); 3660 } 3661 3662 3663 // Support for java_lang_invoke_MethodType 3664 3665 int java_lang_invoke_MethodType::_rtype_offset; 3666 int java_lang_invoke_MethodType::_ptypes_offset; 3667 3668 #define METHODTYPE_FIELDS_DO(macro) \ 3669 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3670 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3671 3672 void java_lang_invoke_MethodType::compute_offsets() { 3673 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3674 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3675 } 3676 3677 #if INCLUDE_CDS 3678 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3679 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3680 } 3681 #endif 3682 3683 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3684 st->print("("); 3685 objArrayOop pts = ptypes(mt); 3686 for (int i = 0, limit = pts->length(); i < limit; i++) { 3687 java_lang_Class::print_signature(pts->obj_at(i), st); 3688 } 3689 st->print(")"); 3690 java_lang_Class::print_signature(rtype(mt), st); 3691 } 3692 3693 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3694 ResourceMark rm; 3695 stringStream buffer(128); 3696 print_signature(mt, &buffer); 3697 const char* sigstr = buffer.base(); 3698 int siglen = (int) buffer.size(); 3699 Symbol *name; 3700 if (!intern_if_not_found) { 3701 name = SymbolTable::probe(sigstr, siglen); 3702 } else { 3703 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3704 } 3705 return name; 3706 } 3707 3708 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3709 if (oopDesc::equals(mt1, mt2)) 3710 return true; 3711 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3712 return false; 3713 if (ptype_count(mt1) != ptype_count(mt2)) 3714 return false; 3715 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3716 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3717 return false; 3718 } 3719 return true; 3720 } 3721 3722 oop java_lang_invoke_MethodType::rtype(oop mt) { 3723 assert(is_instance(mt), "must be a MethodType"); 3724 return mt->obj_field(_rtype_offset); 3725 } 3726 3727 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3728 assert(is_instance(mt), "must be a MethodType"); 3729 return (objArrayOop) mt->obj_field(_ptypes_offset); 3730 } 3731 3732 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3733 return ptypes(mt)->obj_at(idx); 3734 } 3735 3736 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3737 return ptypes(mt)->length(); 3738 } 3739 3740 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3741 objArrayOop pts = ptypes(mt); 3742 int count = pts->length(); 3743 int slots = 0; 3744 for (int i = 0; i < count; i++) { 3745 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3746 slots += type2size[bt]; 3747 } 3748 return slots; 3749 } 3750 3751 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3752 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3753 return type2size[bt]; 3754 } 3755 3756 3757 // Support for java_lang_invoke_CallSite 3758 3759 int java_lang_invoke_CallSite::_target_offset; 3760 int java_lang_invoke_CallSite::_context_offset; 3761 3762 #define CALLSITE_FIELDS_DO(macro) \ 3763 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3764 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3765 3766 void java_lang_invoke_CallSite::compute_offsets() { 3767 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3768 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3769 } 3770 3771 #if INCLUDE_CDS 3772 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3773 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3774 } 3775 #endif 3776 3777 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3778 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3779 3780 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3781 return dep_oop; 3782 } 3783 3784 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3785 3786 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3787 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3788 3789 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3790 InstanceKlass* k = SystemDictionary::Context_klass(); 3791 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3792 } 3793 3794 #if INCLUDE_CDS 3795 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3796 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3797 } 3798 #endif 3799 3800 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3801 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3802 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3803 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3804 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3805 return dep_ctx; 3806 } 3807 3808 // Support for java_security_AccessControlContext 3809 3810 int java_security_AccessControlContext::_context_offset = 0; 3811 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3812 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3813 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3814 3815 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3816 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3817 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3818 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3819 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3820 3821 void java_security_AccessControlContext::compute_offsets() { 3822 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3823 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3824 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3825 } 3826 3827 #if INCLUDE_CDS 3828 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3829 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3830 } 3831 #endif 3832 3833 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3834 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3835 // Ensure klass is initialized 3836 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3837 // Allocate result 3838 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3839 // Fill in values 3840 result->obj_field_put(_context_offset, context()); 3841 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3842 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3843 // whitelist AccessControlContexts created by the JVM if present 3844 if (_isAuthorized_offset != -1) { 3845 result->bool_field_put(_isAuthorized_offset, true); 3846 } 3847 return result; 3848 } 3849 3850 3851 // Support for java_lang_ClassLoader 3852 3853 bool java_lang_ClassLoader::offsets_computed = false; 3854 int java_lang_ClassLoader::_loader_data_offset = -1; 3855 int java_lang_ClassLoader::parallelCapable_offset = -1; 3856 int java_lang_ClassLoader::name_offset = -1; 3857 int java_lang_ClassLoader::nameAndId_offset = -1; 3858 int java_lang_ClassLoader::unnamedModule_offset = -1; 3859 3860 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3861 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3862 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3863 } 3864 3865 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3866 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3867 return RawAccess<>::load_at(loader, _loader_data_offset); 3868 } 3869 3870 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3871 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3872 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3873 } 3874 3875 #define CLASSLOADER_FIELDS_DO(macro) \ 3876 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3877 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3878 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3879 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3880 macro(parent_offset, k1, "parent", classloader_signature, false) 3881 3882 void java_lang_ClassLoader::compute_offsets() { 3883 assert(!offsets_computed, "offsets should be initialized only once"); 3884 offsets_computed = true; 3885 3886 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3887 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3888 3889 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3890 } 3891 3892 #if INCLUDE_CDS 3893 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3894 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3895 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3896 } 3897 #endif 3898 3899 oop java_lang_ClassLoader::parent(oop loader) { 3900 assert(is_instance(loader), "loader must be oop"); 3901 return loader->obj_field(parent_offset); 3902 } 3903 3904 // Returns the name field of this class loader. If the name field has not 3905 // been set, null will be returned. 3906 oop java_lang_ClassLoader::name(oop loader) { 3907 assert(is_instance(loader), "loader must be oop"); 3908 return loader->obj_field(name_offset); 3909 } 3910 3911 // Returns the nameAndId field of this class loader. The format is 3912 // as follows: 3913 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3914 // If the defining loader has no name then <qualified-class-name> @<id> 3915 // If built-in loader, then omit '@<id>' as there is only one instance. 3916 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3917 oop java_lang_ClassLoader::nameAndId(oop loader) { 3918 assert(is_instance(loader), "loader must be oop"); 3919 return loader->obj_field(nameAndId_offset); 3920 } 3921 3922 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3923 assert(is_instance(loader), "loader must be oop"); 3924 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3925 oop acl = loader; 3926 debug_only(jint loop_count = 0); 3927 // This loop taken verbatim from ClassLoader.java: 3928 do { 3929 acl = parent(acl); 3930 if (oopDesc::equals(cl, acl)) { 3931 return true; 3932 } 3933 assert(++loop_count > 0, "loop_count overflow"); 3934 } while (acl != NULL); 3935 return false; 3936 } 3937 3938 bool java_lang_ClassLoader::is_instance(oop obj) { 3939 return obj != NULL && is_subclass(obj->klass()); 3940 } 3941 3942 3943 // For class loader classes, parallelCapable defined 3944 // based on non-null field 3945 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3946 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3947 if (parallelCapable_offset == -1) { 3948 // Default for backward compatibility is false 3949 return false; 3950 } 3951 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3952 } 3953 3954 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3955 // Fix for 4474172; see evaluation for more details 3956 loader = non_reflection_class_loader(loader); 3957 3958 oop cl = SystemDictionary::java_system_loader(); 3959 while(cl != NULL) { 3960 if (oopDesc::equals(cl, loader)) return true; 3961 cl = parent(cl); 3962 } 3963 return false; 3964 } 3965 3966 // Return true if this is one of the class loaders associated with 3967 // the generated bytecodes for reflection. 3968 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3969 if (loader != NULL) { 3970 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3971 // This might be null in non-1.4 JDKs 3972 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3973 } 3974 return false; 3975 } 3976 3977 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3978 // See whether this is one of the class loaders associated with 3979 // the generated bytecodes for reflection, and if so, "magically" 3980 // delegate to its parent to prevent class loading from occurring 3981 // in places where applications using reflection didn't expect it. 3982 if (is_reflection_class_loader(loader)) { 3983 return parent(loader); 3984 } 3985 return loader; 3986 } 3987 3988 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3989 assert(is_instance(loader), "loader must be oop"); 3990 return loader->obj_field(unnamedModule_offset); 3991 } 3992 3993 // Support for java_lang_System 3994 // 3995 #define SYSTEM_FIELDS_DO(macro) \ 3996 macro(static_in_offset, k, "in", input_stream_signature, true); \ 3997 macro(static_out_offset, k, "out", print_stream_signature, true); \ 3998 macro(static_err_offset, k, "err", print_stream_signature, true); \ 3999 macro(static_security_offset, k, "security", security_manager_signature, true) 4000 4001 void java_lang_System::compute_offsets() { 4002 InstanceKlass* k = SystemDictionary::System_klass(); 4003 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4004 } 4005 4006 #if INCLUDE_CDS 4007 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4008 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4009 } 4010 #endif 4011 4012 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4013 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4014 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4015 4016 // Support for jdk_internal_misc_UnsafeConstants 4017 // 4018 class UnsafeConstantsFixup : public FieldClosure { 4019 private: 4020 int _address_size; 4021 int _page_size; 4022 bool _big_endian; 4023 bool _use_unaligned_access; 4024 public: 4025 UnsafeConstantsFixup() { 4026 // round up values for all static final fields 4027 _address_size = sizeof(void*); 4028 _page_size = os::vm_page_size(); 4029 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4030 _use_unaligned_access = UseUnalignedAccesses; 4031 } 4032 4033 void do_field(fieldDescriptor* fd) { 4034 oop mirror = fd->field_holder()->java_mirror(); 4035 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4036 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4037 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4038 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4039 if (fd->name() == vmSymbols::address_size_name()) { 4040 mirror->int_field_put(fd->offset(), _address_size); 4041 } else if (fd->name() == vmSymbols::page_size_name()) { 4042 mirror->int_field_put(fd->offset(), _page_size); 4043 } else if (fd->name() == vmSymbols::big_endian_name()) { 4044 mirror->bool_field_put(fd->offset(), _big_endian); 4045 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4046 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4047 } else { 4048 assert(false, "unexpected UnsafeConstants field"); 4049 } 4050 } 4051 }; 4052 4053 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4054 UnsafeConstantsFixup fixup; 4055 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4056 } 4057 4058 int java_lang_Class::_klass_offset; 4059 int java_lang_Class::_array_klass_offset; 4060 int java_lang_Class::_oop_size_offset; 4061 int java_lang_Class::_static_oop_field_count_offset; 4062 int java_lang_Class::_class_loader_offset; 4063 int java_lang_Class::_module_offset; 4064 int java_lang_Class::_protection_domain_offset; 4065 int java_lang_Class::_component_mirror_offset; 4066 int java_lang_Class::_init_lock_offset; 4067 int java_lang_Class::_signers_offset; 4068 int java_lang_Class::_name_offset; 4069 int java_lang_Class::_source_file_offset; 4070 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4071 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4072 int java_lang_Throwable::backtrace_offset; 4073 int java_lang_Throwable::detailMessage_offset; 4074 int java_lang_Throwable::stackTrace_offset; 4075 int java_lang_Throwable::depth_offset; 4076 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4077 int java_lang_reflect_AccessibleObject::override_offset; 4078 int java_lang_reflect_Method::clazz_offset; 4079 int java_lang_reflect_Method::name_offset; 4080 int java_lang_reflect_Method::returnType_offset; 4081 int java_lang_reflect_Method::parameterTypes_offset; 4082 int java_lang_reflect_Method::exceptionTypes_offset; 4083 int java_lang_reflect_Method::slot_offset; 4084 int java_lang_reflect_Method::modifiers_offset; 4085 int java_lang_reflect_Method::signature_offset; 4086 int java_lang_reflect_Method::annotations_offset; 4087 int java_lang_reflect_Method::parameter_annotations_offset; 4088 int java_lang_reflect_Method::annotation_default_offset; 4089 int java_lang_reflect_Constructor::clazz_offset; 4090 int java_lang_reflect_Constructor::parameterTypes_offset; 4091 int java_lang_reflect_Constructor::exceptionTypes_offset; 4092 int java_lang_reflect_Constructor::slot_offset; 4093 int java_lang_reflect_Constructor::modifiers_offset; 4094 int java_lang_reflect_Constructor::signature_offset; 4095 int java_lang_reflect_Constructor::annotations_offset; 4096 int java_lang_reflect_Constructor::parameter_annotations_offset; 4097 int java_lang_reflect_Field::clazz_offset; 4098 int java_lang_reflect_Field::name_offset; 4099 int java_lang_reflect_Field::type_offset; 4100 int java_lang_reflect_Field::slot_offset; 4101 int java_lang_reflect_Field::modifiers_offset; 4102 int java_lang_reflect_Field::signature_offset; 4103 int java_lang_reflect_Field::annotations_offset; 4104 int java_lang_reflect_Parameter::name_offset; 4105 int java_lang_reflect_Parameter::modifiers_offset; 4106 int java_lang_reflect_Parameter::index_offset; 4107 int java_lang_reflect_Parameter::executable_offset; 4108 int java_lang_boxing_object::value_offset; 4109 int java_lang_boxing_object::long_value_offset; 4110 int java_lang_ref_Reference::referent_offset; 4111 int java_lang_ref_Reference::queue_offset; 4112 int java_lang_ref_Reference::next_offset; 4113 int java_lang_ref_Reference::discovered_offset; 4114 int java_lang_ref_SoftReference::timestamp_offset; 4115 int java_lang_ref_SoftReference::static_clock_offset; 4116 int java_lang_ClassLoader::parent_offset; 4117 int java_lang_System::static_in_offset; 4118 int java_lang_System::static_out_offset; 4119 int java_lang_System::static_err_offset; 4120 int java_lang_System::static_security_offset; 4121 int java_lang_StackTraceElement::methodName_offset; 4122 int java_lang_StackTraceElement::fileName_offset; 4123 int java_lang_StackTraceElement::lineNumber_offset; 4124 int java_lang_StackTraceElement::moduleName_offset; 4125 int java_lang_StackTraceElement::moduleVersion_offset; 4126 int java_lang_StackTraceElement::classLoaderName_offset; 4127 int java_lang_StackTraceElement::declaringClass_offset; 4128 int java_lang_StackTraceElement::declaringClassObject_offset; 4129 int java_lang_StackFrameInfo::_memberName_offset; 4130 int java_lang_StackFrameInfo::_bci_offset; 4131 int java_lang_StackFrameInfo::_version_offset; 4132 int java_lang_LiveStackFrameInfo::_monitors_offset; 4133 int java_lang_LiveStackFrameInfo::_locals_offset; 4134 int java_lang_LiveStackFrameInfo::_operands_offset; 4135 int java_lang_LiveStackFrameInfo::_mode_offset; 4136 int java_lang_AssertionStatusDirectives::classes_offset; 4137 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4138 int java_lang_AssertionStatusDirectives::packages_offset; 4139 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4140 int java_lang_AssertionStatusDirectives::deflt_offset; 4141 int java_nio_Buffer::_limit_offset; 4142 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4143 int reflect_ConstantPool::_oop_offset; 4144 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4145 4146 4147 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4148 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4149 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4150 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4151 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4152 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4153 macro(methodName_offset, k, "methodName", string_signature, false); \ 4154 macro(fileName_offset, k, "fileName", string_signature, false); \ 4155 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4156 4157 // Support for java_lang_StackTraceElement 4158 void java_lang_StackTraceElement::compute_offsets() { 4159 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4160 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4161 } 4162 4163 #if INCLUDE_CDS 4164 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4165 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4166 } 4167 #endif 4168 4169 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4170 element->obj_field_put(fileName_offset, value); 4171 } 4172 4173 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4174 element->obj_field_put(declaringClass_offset, value); 4175 } 4176 4177 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4178 element->obj_field_put(methodName_offset, value); 4179 } 4180 4181 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4182 element->int_field_put(lineNumber_offset, value); 4183 } 4184 4185 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4186 element->obj_field_put(moduleName_offset, value); 4187 } 4188 4189 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4190 element->obj_field_put(moduleVersion_offset, value); 4191 } 4192 4193 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4194 element->obj_field_put(classLoaderName_offset, value); 4195 } 4196 4197 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4198 element->obj_field_put(declaringClassObject_offset, value); 4199 } 4200 4201 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4202 element->short_field_put(_version_offset, value); 4203 } 4204 4205 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4206 element->int_field_put(_bci_offset, value); 4207 } 4208 4209 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4210 element->obj_field_put(_monitors_offset, value); 4211 } 4212 4213 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4214 element->obj_field_put(_locals_offset, value); 4215 } 4216 4217 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4218 element->obj_field_put(_operands_offset, value); 4219 } 4220 4221 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4222 element->int_field_put(_mode_offset, value); 4223 } 4224 4225 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4226 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4227 macro(classes_offset, k, "classes", string_array_signature, false); \ 4228 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4229 macro(packages_offset, k, "packages", string_array_signature, false); \ 4230 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4231 macro(deflt_offset, k, "deflt", bool_signature, false) 4232 4233 void java_lang_AssertionStatusDirectives::compute_offsets() { 4234 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4235 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4236 } 4237 4238 #if INCLUDE_CDS 4239 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4240 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4241 } 4242 #endif 4243 4244 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4245 o->obj_field_put(classes_offset, val); 4246 } 4247 4248 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4249 o->obj_field_put(classEnabled_offset, val); 4250 } 4251 4252 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4253 o->obj_field_put(packages_offset, val); 4254 } 4255 4256 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4257 o->obj_field_put(packageEnabled_offset, val); 4258 } 4259 4260 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4261 o->bool_field_put(deflt_offset, val); 4262 } 4263 4264 4265 // Support for intrinsification of java.nio.Buffer.checkIndex 4266 int java_nio_Buffer::limit_offset() { 4267 return _limit_offset; 4268 } 4269 4270 #define BUFFER_FIELDS_DO(macro) \ 4271 macro(_limit_offset, k, "limit", int_signature, false) 4272 4273 void java_nio_Buffer::compute_offsets() { 4274 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4275 assert(k != NULL, "must be loaded in 1.4+"); 4276 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4277 } 4278 4279 #if INCLUDE_CDS 4280 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4281 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4282 } 4283 #endif 4284 4285 #define AOS_FIELDS_DO(macro) \ 4286 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4287 4288 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4289 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4290 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4291 } 4292 4293 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4294 assert(_owner_offset != 0, "Must be initialized"); 4295 return obj->obj_field(_owner_offset); 4296 } 4297 4298 #if INCLUDE_CDS 4299 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4300 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4301 } 4302 #endif 4303 4304 static int member_offset(int hardcoded_offset) { 4305 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4306 } 4307 4308 // Compute hard-coded offsets 4309 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4310 // are not available to determine the offset_of_static_fields. 4311 void JavaClasses::compute_hard_coded_offsets() { 4312 4313 // java_lang_boxing_object 4314 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4315 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4316 4317 // java_lang_ref_Reference 4318 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4319 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4320 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4321 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4322 } 4323 4324 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4325 4326 // Compute non-hard-coded field offsets of all the classes in this file 4327 void JavaClasses::compute_offsets() { 4328 if (UseSharedSpaces) { 4329 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4330 JvmtiExport::has_early_class_hook_env()), 4331 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4332 // None of the classes used by the rest of this function can be replaced by 4333 // JMVTI ClassFileLoadHook. 4334 // We are safe to use the archived offsets, which have already been restored 4335 // by JavaClasses::serialize_offsets, without computing the offsets again. 4336 return; 4337 } 4338 4339 // We have already called the compute_offsets() of the 4340 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4341 // earlier inside SystemDictionary::resolve_well_known_classes() 4342 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4343 4344 // generated interpreter code wants to know about the offsets we just computed: 4345 AbstractAssembler::update_delayed_values(); 4346 } 4347 4348 #if INCLUDE_CDS 4349 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4350 4351 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4352 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4353 } 4354 #endif 4355 4356 4357 #ifndef PRODUCT 4358 4359 // These functions exist to assert the validity of hard-coded field offsets to guard 4360 // against changes in the class files 4361 4362 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4363 EXCEPTION_MARK; 4364 fieldDescriptor fd; 4365 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4366 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4367 InstanceKlass* ik = InstanceKlass::cast(k); 4368 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4369 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4370 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4371 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4372 return false; 4373 } 4374 if (fd.is_static()) { 4375 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4376 return false; 4377 } 4378 if (fd.offset() == hardcoded_offset ) { 4379 return true; 4380 } else { 4381 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4382 klass_name, field_name, hardcoded_offset, fd.offset()); 4383 return false; 4384 } 4385 } 4386 4387 // Check the hard-coded field offsets of all the classes in this file 4388 4389 void JavaClasses::check_offsets() { 4390 bool valid = true; 4391 4392 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4393 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4394 4395 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4396 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4397 4398 // Boxed primitive objects (java_lang_boxing_object) 4399 4400 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4401 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4402 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4403 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4404 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4405 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4406 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4407 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4408 4409 // java.lang.ref.Reference 4410 4411 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4412 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4413 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4414 // Fake field 4415 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4416 4417 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4418 } 4419 4420 #endif // PRODUCT 4421 4422 int InjectedField::compute_offset() { 4423 InstanceKlass* ik = InstanceKlass::cast(klass()); 4424 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4425 if (!may_be_java && !fs.access_flags().is_internal()) { 4426 // Only look at injected fields 4427 continue; 4428 } 4429 if (fs.name() == name() && fs.signature() == signature()) { 4430 return fs.offset(); 4431 } 4432 } 4433 ResourceMark rm; 4434 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)" : ""); 4435 #ifndef PRODUCT 4436 ik->print(); 4437 tty->print_cr("all fields:"); 4438 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4439 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4440 } 4441 #endif //PRODUCT 4442 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4443 return -1; 4444 } 4445 4446 void javaClasses_init() { 4447 JavaClasses::compute_offsets(); 4448 JavaClasses::check_offsets(); 4449 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4450 }