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/symbolTable.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "code/debugInfo.hpp" 34 #include "code/dependencyContext.hpp" 35 #include "code/pcDesc.hpp" 36 #include "interpreter/interpreter.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logStream.hpp" 40 #include "memory/heapShared.inline.hpp" 41 #include "memory/metaspaceShared.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "memory/universe.hpp" 45 #include "oops/fieldStreams.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/instanceMirrorKlass.hpp" 48 #include "oops/klass.hpp" 49 #include "oops/method.inline.hpp" 50 #include "oops/objArrayOop.inline.hpp" 51 #include "oops/oop.inline.hpp" 52 #include "oops/symbol.hpp" 53 #include "oops/typeArrayOop.inline.hpp" 54 #include "prims/jvmtiExport.hpp" 55 #include "prims/resolvedMethodTable.hpp" 56 #include "runtime/fieldDescriptor.inline.hpp" 57 #include "runtime/frame.inline.hpp" 58 #include "runtime/handles.inline.hpp" 59 #include "runtime/interfaceSupport.inline.hpp" 60 #include "runtime/java.hpp" 61 #include "runtime/javaCalls.hpp" 62 #include "runtime/jniHandles.inline.hpp" 63 #include "runtime/safepoint.hpp" 64 #include "runtime/safepointVerifiers.hpp" 65 #include "runtime/thread.inline.hpp" 66 #include "runtime/vframe.inline.hpp" 67 #include "runtime/vm_version.hpp" 68 #include "utilities/align.hpp" 69 #include "utilities/preserveException.hpp" 70 #include "utilities/utf8.hpp" 71 #if INCLUDE_JVMCI 72 #include "jvmci/jvmciJavaClasses.hpp" 73 #endif 74 75 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 76 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 77 78 #if INCLUDE_CDS 79 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 80 f->do_u4((u4*)&_##name##_offset); 81 #endif 82 83 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 84 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 85 86 InjectedField JavaClasses::_injected_fields[] = { 87 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 88 }; 89 90 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 91 return _injected_fields[id].compute_offset(); 92 } 93 94 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 95 *field_count = 0; 96 97 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 98 if (sid == vmSymbols::NO_SID) { 99 // Only well known classes can inject fields 100 return NULL; 101 } 102 103 int count = 0; 104 int start = -1; 105 106 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 107 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 108 count++; \ 109 if (start == -1) start = klass##_##name##_enum; \ 110 } 111 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 112 #undef LOOKUP_INJECTED_FIELD 113 114 if (start != -1) { 115 *field_count = count; 116 return _injected_fields + start; 117 } 118 return NULL; 119 } 120 121 122 // Helpful routine for computing field offsets at run time rather than hardcoding them 123 // Finds local fields only, including static fields. Static field offsets are from the 124 // beginning of the mirror. 125 static void compute_offset(int &dest_offset, 126 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 127 bool is_static = false) { 128 fieldDescriptor fd; 129 if (ik == NULL) { 130 ResourceMark rm; 131 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 132 vm_exit_during_initialization("Invalid layout of well-known class"); 133 } 134 135 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 136 ResourceMark rm; 137 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 138 name_symbol->as_C_string(), signature_symbol->as_C_string()); 139 #ifndef PRODUCT 140 // Prints all fields and offsets 141 Log(class) lt; 142 LogStream ls(lt.error()); 143 ik->print_on(&ls); 144 #endif //PRODUCT 145 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 146 } 147 dest_offset = fd.offset(); 148 } 149 150 // Overloading to pass name as a string. 151 static void compute_offset(int& dest_offset, InstanceKlass* ik, 152 const char* name_string, Symbol* signature_symbol, 153 bool is_static = false) { 154 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 155 if (name == NULL) { 156 ResourceMark rm; 157 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 158 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 159 } 160 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 161 } 162 163 int java_lang_String::value_offset = 0; 164 int java_lang_String::hash_offset = 0; 165 int java_lang_String::hashIsZero_offset = 0; 166 int java_lang_String::coder_offset = 0; 167 168 bool java_lang_String::initialized = false; 169 170 bool java_lang_String::is_instance(oop obj) { 171 return is_instance_inlined(obj); 172 } 173 174 #if INCLUDE_CDS 175 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 176 f->do_u4((u4*)&offset) 177 #endif 178 179 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 180 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 181 182 #define STRING_FIELDS_DO(macro) \ 183 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 184 macro(hash_offset, k, "hash", int_signature, false); \ 185 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 186 macro(coder_offset, k, "coder", byte_signature, false); 187 188 void java_lang_String::compute_offsets() { 189 if (initialized) { 190 return; 191 } 192 193 InstanceKlass* k = SystemDictionary::String_klass(); 194 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 195 196 initialized = true; 197 } 198 199 #if INCLUDE_CDS 200 void java_lang_String::serialize_offsets(SerializeClosure* f) { 201 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 202 f->do_bool(&initialized); 203 } 204 #endif 205 206 class CompactStringsFixup : public FieldClosure { 207 private: 208 bool _value; 209 210 public: 211 CompactStringsFixup(bool value) : _value(value) {} 212 213 void do_field(fieldDescriptor* fd) { 214 if (fd->name() == vmSymbols::compact_strings_name()) { 215 oop mirror = fd->field_holder()->java_mirror(); 216 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 217 assert(mirror != NULL, "String must have mirror already"); 218 mirror->bool_field_put(fd->offset(), _value); 219 } 220 } 221 }; 222 223 void java_lang_String::set_compact_strings(bool value) { 224 CompactStringsFixup fix(value); 225 SystemDictionary::String_klass()->do_local_static_fields(&fix); 226 } 227 228 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 229 assert(initialized, "Must be initialized"); 230 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 231 232 // Create the String object first, so there's a chance that the String 233 // and the char array it points to end up in the same cache line. 234 oop obj; 235 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 236 237 // Create the char array. The String object must be handlized here 238 // because GC can happen as a result of the allocation attempt. 239 Handle h_obj(THREAD, obj); 240 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 241 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 242 243 // Point the String at the char array 244 obj = h_obj(); 245 set_value(obj, buffer); 246 // No need to zero the offset, allocation zero'ed the entire String object 247 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 248 return h_obj; 249 } 250 251 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 252 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 253 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 254 typeArrayOop buffer = value(h_obj()); 255 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 256 if (is_latin1) { 257 for (int index = 0; index < length; index++) { 258 buffer->byte_at_put(index, (jbyte)unicode[index]); 259 } 260 } else { 261 for (int index = 0; index < length; index++) { 262 buffer->char_at_put(index, unicode[index]); 263 } 264 } 265 266 #ifdef ASSERT 267 { 268 ResourceMark rm; 269 char* expected = UNICODE::as_utf8(unicode, length); 270 char* actual = as_utf8_string(h_obj()); 271 if (strcmp(expected, actual) != 0) { 272 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 273 ShouldNotReachHere(); 274 } 275 } 276 #endif 277 278 return h_obj; 279 } 280 281 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 282 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 283 return h_obj(); 284 } 285 286 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 287 if (utf8_str == NULL) { 288 return Handle(); 289 } 290 bool has_multibyte, is_latin1; 291 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 292 if (!CompactStrings) { 293 has_multibyte = true; 294 is_latin1 = false; 295 } 296 297 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 298 if (length > 0) { 299 if (!has_multibyte) { 300 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 301 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 302 } else if (is_latin1) { 303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 304 } else { 305 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 306 } 307 } 308 309 #ifdef ASSERT 310 // This check is too strict because the input string is not necessarily valid UTF8. 311 // For example, it may be created with arbitrary content via jni_NewStringUTF. 312 /* 313 { 314 ResourceMark rm; 315 const char* expected = utf8_str; 316 char* actual = as_utf8_string(h_obj()); 317 if (strcmp(expected, actual) != 0) { 318 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 319 ShouldNotReachHere(); 320 } 321 } 322 */ 323 #endif 324 325 return h_obj; 326 } 327 328 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 329 Handle h_obj = create_from_str(utf8_str, CHECK_0); 330 return h_obj(); 331 } 332 333 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 334 const char* utf8_str = (char*)symbol->bytes(); 335 int utf8_len = symbol->utf8_length(); 336 337 bool has_multibyte, is_latin1; 338 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 339 if (!CompactStrings) { 340 has_multibyte = true; 341 is_latin1 = false; 342 } 343 344 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 345 if (length > 0) { 346 if (!has_multibyte) { 347 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 348 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 349 } else if (is_latin1) { 350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 351 } else { 352 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 353 } 354 } 355 356 #ifdef ASSERT 357 { 358 ResourceMark rm; 359 const char* expected = symbol->as_utf8(); 360 char* actual = as_utf8_string(h_obj()); 361 if (strncmp(expected, actual, utf8_len) != 0) { 362 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 363 ShouldNotReachHere(); 364 } 365 } 366 #endif 367 368 return h_obj; 369 } 370 371 // Converts a C string to a Java String based on current encoding 372 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 373 assert(str != NULL, "bad arguments"); 374 375 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 376 static to_java_string_fn_t _to_java_string_fn = NULL; 377 378 if (_to_java_string_fn == NULL) { 379 void *lib_handle = os::native_java_library(); 380 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 381 if (_to_java_string_fn == NULL) { 382 fatal("NewStringPlatform missing"); 383 } 384 } 385 386 jstring js = NULL; 387 { JavaThread* thread = (JavaThread*)THREAD; 388 assert(thread->is_Java_thread(), "must be java thread"); 389 HandleMark hm(thread); 390 ThreadToNativeFromVM ttn(thread); 391 js = (_to_java_string_fn)(thread->jni_environment(), str); 392 } 393 return Handle(THREAD, JNIHandles::resolve(js)); 394 } 395 396 // Converts a Java String to a native C string that can be used for 397 // native OS calls. 398 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 399 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 400 static to_platform_string_fn_t _to_platform_string_fn = NULL; 401 402 if (_to_platform_string_fn == NULL) { 403 void *lib_handle = os::native_java_library(); 404 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 405 if (_to_platform_string_fn == NULL) { 406 fatal("GetStringPlatformChars missing"); 407 } 408 } 409 410 char *native_platform_string; 411 { JavaThread* thread = (JavaThread*)THREAD; 412 assert(thread->is_Java_thread(), "must be java thread"); 413 JNIEnv *env = thread->jni_environment(); 414 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 415 bool is_copy; 416 HandleMark hm(thread); 417 ThreadToNativeFromVM ttn(thread); 418 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 419 assert(is_copy == JNI_TRUE, "is_copy value changed"); 420 JNIHandles::destroy_local(js); 421 } 422 return native_platform_string; 423 } 424 425 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 426 oop obj = java_string(); 427 // Typical usage is to convert all '/' to '.' in string. 428 typeArrayOop value = java_lang_String::value(obj); 429 int length = java_lang_String::length(obj, value); 430 bool is_latin1 = java_lang_String::is_latin1(obj); 431 432 // First check if any from_char exist 433 int index; // Declared outside, used later 434 for (index = 0; index < length; index++) { 435 jchar c = !is_latin1 ? value->char_at(index) : 436 ((jchar) value->byte_at(index)) & 0xff; 437 if (c == from_char) { 438 break; 439 } 440 } 441 if (index == length) { 442 // No from_char, so do not copy. 443 return java_string; 444 } 445 446 // Check if result string will be latin1 447 bool to_is_latin1 = false; 448 449 // Replacement char must be latin1 450 if (CompactStrings && UNICODE::is_latin1(to_char)) { 451 if (is_latin1) { 452 // Source string is latin1 as well 453 to_is_latin1 = true; 454 } else if (!UNICODE::is_latin1(from_char)) { 455 // We are replacing an UTF16 char. Scan string to 456 // check if result can be latin1 encoded. 457 to_is_latin1 = true; 458 for (index = 0; index < length; index++) { 459 jchar c = value->char_at(index); 460 if (c != from_char && !UNICODE::is_latin1(c)) { 461 to_is_latin1 = false; 462 break; 463 } 464 } 465 } 466 } 467 468 // Create new UNICODE (or byte) buffer. Must handlize value because GC 469 // may happen during String and char array creation. 470 typeArrayHandle h_value(THREAD, value); 471 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 472 typeArrayOop from_buffer = h_value(); 473 typeArrayOop to_buffer = java_lang_String::value(string()); 474 475 // Copy contents 476 for (index = 0; index < length; index++) { 477 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 478 ((jchar) from_buffer->byte_at(index)) & 0xff; 479 if (c == from_char) { 480 c = to_char; 481 } 482 if (!to_is_latin1) { 483 to_buffer->char_at_put(index, c); 484 } else { 485 to_buffer->byte_at_put(index, (jbyte) c); 486 } 487 } 488 return string; 489 } 490 491 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 492 typeArrayOop value = java_lang_String::value(java_string); 493 length = java_lang_String::length(java_string, value); 494 bool is_latin1 = java_lang_String::is_latin1(java_string); 495 496 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 497 if (result != NULL) { 498 if (!is_latin1) { 499 for (int index = 0; index < length; index++) { 500 result[index] = value->char_at(index); 501 } 502 } else { 503 for (int index = 0; index < length; index++) { 504 result[index] = ((jchar) value->byte_at(index)) & 0xff; 505 } 506 } 507 } else { 508 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 509 } 510 return result; 511 } 512 513 unsigned int java_lang_String::hash_code(oop java_string) { 514 // The hash and hashIsZero fields are subject to a benign data race, 515 // making it crucial to ensure that any observable result of the 516 // calculation in this method stays correct under any possible read of 517 // these fields. Necessary restrictions to allow this to be correct 518 // without explicit memory fences or similar concurrency primitives is 519 // that we can ever only write to one of these two fields for a given 520 // String instance, and that the computation is idempotent and derived 521 // from immutable state 522 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 523 if (java_lang_String::hash_is_set(java_string)) { 524 return java_string->int_field(hash_offset); 525 } 526 527 typeArrayOop value = java_lang_String::value(java_string); 528 int length = java_lang_String::length(java_string, value); 529 bool is_latin1 = java_lang_String::is_latin1(java_string); 530 531 unsigned int hash = 0; 532 if (length > 0) { 533 if (is_latin1) { 534 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 535 } else { 536 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 537 } 538 } 539 540 if (hash != 0) { 541 java_string->int_field_put(hash_offset, hash); 542 } else { 543 java_string->bool_field_put(hashIsZero_offset, true); 544 } 545 return hash; 546 } 547 548 char* java_lang_String::as_quoted_ascii(oop java_string) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string, value); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 553 if (length == 0) return NULL; 554 555 char* result; 556 int result_length; 557 if (!is_latin1) { 558 jchar* base = value->char_at_addr(0); 559 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 560 result = NEW_RESOURCE_ARRAY(char, result_length); 561 UNICODE::as_quoted_ascii(base, length, result, result_length); 562 } else { 563 jbyte* base = value->byte_at_addr(0); 564 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 565 result = NEW_RESOURCE_ARRAY(char, result_length); 566 UNICODE::as_quoted_ascii(base, length, result, result_length); 567 } 568 assert(result_length >= length + 1, "must not be shorter"); 569 assert(result_length == (int)strlen(result) + 1, "must match"); 570 return result; 571 } 572 573 Symbol* java_lang_String::as_symbol(oop java_string) { 574 typeArrayOop value = java_lang_String::value(java_string); 575 int length = java_lang_String::length(java_string, value); 576 bool is_latin1 = java_lang_String::is_latin1(java_string); 577 if (!is_latin1) { 578 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 579 Symbol* sym = SymbolTable::new_symbol(base, length); 580 return sym; 581 } else { 582 ResourceMark rm; 583 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 584 const char* base = UNICODE::as_utf8(position, length); 585 Symbol* sym = SymbolTable::new_symbol(base, length); 586 return sym; 587 } 588 } 589 590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 591 typeArrayOop value = java_lang_String::value(java_string); 592 int length = java_lang_String::length(java_string, value); 593 bool is_latin1 = java_lang_String::is_latin1(java_string); 594 if (!is_latin1) { 595 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 596 return SymbolTable::probe_unicode(base, length); 597 } else { 598 ResourceMark rm; 599 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 600 const char* base = UNICODE::as_utf8(position, length); 601 return SymbolTable::probe(base, length); 602 } 603 } 604 605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 606 assert(value_equals(value, java_lang_String::value(java_string)), 607 "value must be same as java_lang_String::value(java_string)"); 608 int length = java_lang_String::length(java_string, value); 609 if (length == 0) { 610 return 0; 611 } 612 if (!java_lang_String::is_latin1(java_string)) { 613 return UNICODE::utf8_length(value->char_at_addr(0), length); 614 } else { 615 return UNICODE::utf8_length(value->byte_at_addr(0), length); 616 } 617 } 618 619 int java_lang_String::utf8_length(oop java_string) { 620 typeArrayOop value = java_lang_String::value(java_string); 621 return utf8_length(java_string, value); 622 } 623 624 char* java_lang_String::as_utf8_string(oop java_string) { 625 typeArrayOop value = java_lang_String::value(java_string); 626 int length = java_lang_String::length(java_string, value); 627 bool is_latin1 = java_lang_String::is_latin1(java_string); 628 if (!is_latin1) { 629 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 630 return UNICODE::as_utf8(position, length); 631 } else { 632 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 633 return UNICODE::as_utf8(position, length); 634 } 635 } 636 637 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 638 assert(value_equals(value, java_lang_String::value(java_string)), 639 "value must be same as java_lang_String::value(java_string)"); 640 int length = java_lang_String::length(java_string, value); 641 bool is_latin1 = java_lang_String::is_latin1(java_string); 642 if (!is_latin1) { 643 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 644 return UNICODE::as_utf8(position, length, buf, buflen); 645 } else { 646 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 647 return UNICODE::as_utf8(position, length, buf, buflen); 648 } 649 } 650 651 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 652 typeArrayOop value = java_lang_String::value(java_string); 653 return as_utf8_string(java_string, value, buf, buflen); 654 } 655 656 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 657 typeArrayOop value = java_lang_String::value(java_string); 658 bool is_latin1 = java_lang_String::is_latin1(java_string); 659 assert(start + len <= java_lang_String::length(java_string), "just checking"); 660 if (!is_latin1) { 661 jchar* position = value->char_at_addr(start); 662 return UNICODE::as_utf8(position, len); 663 } else { 664 jbyte* position = value->byte_at_addr(start); 665 return UNICODE::as_utf8(position, len); 666 } 667 } 668 669 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 670 assert(value_equals(value, java_lang_String::value(java_string)), 671 "value must be same as java_lang_String::value(java_string)"); 672 assert(start + len <= java_lang_String::length(java_string), "just checking"); 673 bool is_latin1 = java_lang_String::is_latin1(java_string); 674 if (!is_latin1) { 675 jchar* position = value->char_at_addr(start); 676 return UNICODE::as_utf8(position, len, buf, buflen); 677 } else { 678 jbyte* position = value->byte_at_addr(start); 679 return UNICODE::as_utf8(position, len, buf, buflen); 680 } 681 } 682 683 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 684 assert(java_string->klass() == SystemDictionary::String_klass(), 685 "must be java_string"); 686 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 687 int length = java_lang_String::length(java_string, value); 688 if (length != len) { 689 return false; 690 } 691 bool is_latin1 = java_lang_String::is_latin1(java_string); 692 if (!is_latin1) { 693 for (int i = 0; i < len; i++) { 694 if (value->char_at(i) != chars[i]) { 695 return false; 696 } 697 } 698 } else { 699 for (int i = 0; i < len; i++) { 700 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 701 return false; 702 } 703 } 704 } 705 return true; 706 } 707 708 bool java_lang_String::equals(oop str1, oop str2) { 709 assert(str1->klass() == SystemDictionary::String_klass(), 710 "must be java String"); 711 assert(str2->klass() == SystemDictionary::String_klass(), 712 "must be java String"); 713 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 714 bool is_latin1 = java_lang_String::is_latin1(str1); 715 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 716 bool is_latin2 = java_lang_String::is_latin1(str2); 717 718 if (is_latin1 != is_latin2) { 719 // Strings with different coders are never equal. 720 return false; 721 } 722 return value_equals(value1, value2); 723 } 724 725 void java_lang_String::print(oop java_string, outputStream* st) { 726 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 727 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 728 729 if (value == NULL) { 730 // This can happen if, e.g., printing a String 731 // object before its initializer has been called 732 st->print("NULL"); 733 return; 734 } 735 736 int length = java_lang_String::length(java_string, value); 737 bool is_latin1 = java_lang_String::is_latin1(java_string); 738 739 st->print("\""); 740 for (int index = 0; index < length; index++) { 741 st->print("%c", (!is_latin1) ? value->char_at(index) : 742 ((jchar) value->byte_at(index)) & 0xff ); 743 } 744 st->print("\""); 745 } 746 747 748 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 749 assert(mirror.not_null() && fd->is_static(), "just checking"); 750 if (fd->has_initial_value()) { 751 BasicType t = fd->field_type(); 752 switch (t) { 753 case T_BYTE: 754 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 755 break; 756 case T_BOOLEAN: 757 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 758 break; 759 case T_CHAR: 760 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 761 break; 762 case T_SHORT: 763 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 764 break; 765 case T_INT: 766 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 767 break; 768 case T_FLOAT: 769 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 770 break; 771 case T_DOUBLE: 772 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 773 break; 774 case T_LONG: 775 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 776 break; 777 case T_OBJECT: 778 { 779 assert(fd->signature() == vmSymbols::string_signature(), 780 "just checking"); 781 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 782 // Archive the String field and update the pointer. 783 oop s = mirror()->obj_field(fd->offset()); 784 oop archived_s = StringTable::create_archived_string(s, CHECK); 785 mirror()->obj_field_put(fd->offset(), archived_s); 786 } else { 787 oop string = fd->string_initial_value(CHECK); 788 mirror()->obj_field_put(fd->offset(), string); 789 } 790 } 791 break; 792 default: 793 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 794 "Illegal ConstantValue attribute in class file"); 795 } 796 } 797 } 798 799 800 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 801 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 802 803 // If the offset was read from the shared archive, it was fixed up already 804 if (!k->is_shared()) { 805 if (k->is_instance_klass()) { 806 // During bootstrap, java.lang.Class wasn't loaded so static field 807 // offsets were computed without the size added it. Go back and 808 // update all the static field offsets to included the size. 809 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 810 if (fs.access_flags().is_static()) { 811 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 812 fs.set_offset(real_offset); 813 } 814 } 815 } 816 } 817 818 if (k->is_shared() && k->has_raw_archived_mirror()) { 819 if (HeapShared::open_archive_heap_region_mapped()) { 820 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 821 assert(present, "Missing archived mirror for %s", k->external_name()); 822 return; 823 } else { 824 k->set_java_mirror_handle(NULL); 825 k->clear_has_raw_archived_mirror(); 826 } 827 } 828 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 829 } 830 831 void java_lang_Class::initialize_mirror_fields(Klass* k, 832 Handle mirror, 833 Handle protection_domain, 834 TRAPS) { 835 // Allocate a simple java object for a lock. 836 // This needs to be a java object because during class initialization 837 // it can be held across a java call. 838 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 839 set_init_lock(mirror(), r); 840 841 // Set protection domain also 842 set_protection_domain(mirror(), protection_domain()); 843 844 // Initialize static fields 845 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 846 } 847 848 // Set the java.lang.Module module field in the java_lang_Class mirror 849 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 850 if (module.is_null()) { 851 // During startup, the module may be NULL only if java.base has not been defined yet. 852 // Put the class on the fixup_module_list to patch later when the java.lang.Module 853 // for java.base is known. But note that since we captured the NULL module another 854 // thread may have completed that initialization. 855 856 bool javabase_was_defined = false; 857 { 858 MutexLocker m1(Module_lock, THREAD); 859 // Keep list of classes needing java.base module fixup 860 if (!ModuleEntryTable::javabase_defined()) { 861 assert(k->java_mirror() != NULL, "Class's mirror is null"); 862 k->class_loader_data()->inc_keep_alive(); 863 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 864 fixup_module_field_list()->push(k); 865 } else { 866 javabase_was_defined = true; 867 } 868 } 869 870 // If java.base was already defined then patch this particular class with java.base. 871 if (javabase_was_defined) { 872 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 873 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 874 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 875 Handle javabase_handle(THREAD, javabase_entry->module()); 876 set_module(mirror(), javabase_handle()); 877 } 878 } else { 879 assert(Universe::is_module_initialized() || 880 (ModuleEntryTable::javabase_defined() && 881 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 882 "Incorrect java.lang.Module specification while creating mirror"); 883 set_module(mirror(), module()); 884 } 885 } 886 887 // Statically allocate fixup lists because they always get created. 888 void java_lang_Class::allocate_fixup_lists() { 889 GrowableArray<Klass*>* mirror_list = 890 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 891 set_fixup_mirror_list(mirror_list); 892 893 GrowableArray<Klass*>* module_list = 894 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 895 set_fixup_module_field_list(module_list); 896 } 897 898 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 899 Handle module, Handle protection_domain, TRAPS) { 900 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 901 assert(k->java_mirror() == NULL, "should only assign mirror once"); 902 903 // Use this moment of initialization to cache modifier_flags also, 904 // to support Class.getModifiers(). Instance classes recalculate 905 // the cached flags after the class file is parsed, but before the 906 // class is put into the system dictionary. 907 int computed_modifiers = k->compute_modifier_flags(CHECK); 908 k->set_modifier_flags(computed_modifiers); 909 // Class_klass has to be loaded because it is used to allocate 910 // the mirror. 911 if (SystemDictionary::Class_klass_loaded()) { 912 // Allocate mirror (java.lang.Class instance) 913 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 914 Handle mirror(THREAD, mirror_oop); 915 Handle comp_mirror; 916 917 // Setup indirection from mirror->klass 918 java_lang_Class::set_klass(mirror(), k); 919 920 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 921 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 922 923 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 924 925 // It might also have a component mirror. This mirror must already exist. 926 if (k->is_array_klass()) { 927 if (k->is_typeArray_klass()) { 928 BasicType type = TypeArrayKlass::cast(k)->element_type(); 929 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 930 } else { 931 assert(k->is_objArray_klass(), "Must be"); 932 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 933 assert(element_klass != NULL, "Must have an element klass"); 934 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 935 } 936 assert(comp_mirror() != NULL, "must have a mirror"); 937 938 // Two-way link between the array klass and its component mirror: 939 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 940 set_component_mirror(mirror(), comp_mirror()); 941 // See below for ordering dependencies between field array_klass in component mirror 942 // and java_mirror in this klass. 943 } else { 944 assert(k->is_instance_klass(), "Must be"); 945 946 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 947 if (HAS_PENDING_EXCEPTION) { 948 // If any of the fields throws an exception like OOM remove the klass field 949 // from the mirror so GC doesn't follow it after the klass has been deallocated. 950 // This mirror looks like a primitive type, which logically it is because it 951 // it represents no class. 952 java_lang_Class::set_klass(mirror(), NULL); 953 return; 954 } 955 } 956 957 // set the classLoader field in the java_lang_Class instance 958 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 959 set_class_loader(mirror(), class_loader()); 960 961 // Setup indirection from klass->mirror 962 // after any exceptions can happen during allocations. 963 k->set_java_mirror(mirror); 964 965 // Set the module field in the java_lang_Class instance. This must be done 966 // after the mirror is set. 967 set_mirror_module_field(k, mirror, module, THREAD); 968 969 if (comp_mirror() != NULL) { 970 // Set after k->java_mirror() is published, because compiled code running 971 // concurrently doesn't expect a k to have a null java_mirror. 972 release_set_array_klass(comp_mirror(), k); 973 } 974 } else { 975 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 976 fixup_mirror_list()->push(k); 977 } 978 } 979 980 #if INCLUDE_CDS_JAVA_HEAP 981 // Clears mirror fields. Static final fields with initial values are reloaded 982 // from constant pool. The object identity hash is in the object header and is 983 // not affected. 984 class ResetMirrorField: public FieldClosure { 985 private: 986 Handle _m; 987 988 public: 989 ResetMirrorField(Handle mirror) : _m(mirror) {} 990 991 void do_field(fieldDescriptor* fd) { 992 assert(DumpSharedSpaces, "dump time only"); 993 assert(_m.not_null(), "Mirror cannot be NULL"); 994 995 if (fd->is_static() && fd->has_initial_value()) { 996 initialize_static_field(fd, _m, Thread::current()); 997 return; 998 } 999 1000 BasicType ft = fd->field_type(); 1001 switch (ft) { 1002 case T_BYTE: 1003 _m()->byte_field_put(fd->offset(), 0); 1004 break; 1005 case T_CHAR: 1006 _m()->char_field_put(fd->offset(), 0); 1007 break; 1008 case T_DOUBLE: 1009 _m()->double_field_put(fd->offset(), 0); 1010 break; 1011 case T_FLOAT: 1012 _m()->float_field_put(fd->offset(), 0); 1013 break; 1014 case T_INT: 1015 _m()->int_field_put(fd->offset(), 0); 1016 break; 1017 case T_LONG: 1018 _m()->long_field_put(fd->offset(), 0); 1019 break; 1020 case T_SHORT: 1021 _m()->short_field_put(fd->offset(), 0); 1022 break; 1023 case T_BOOLEAN: 1024 _m()->bool_field_put(fd->offset(), false); 1025 break; 1026 case T_ARRAY: 1027 case T_OBJECT: { 1028 // It might be useful to cache the String field, but 1029 // for now just clear out any reference field 1030 oop o = _m()->obj_field(fd->offset()); 1031 _m()->obj_field_put(fd->offset(), NULL); 1032 break; 1033 } 1034 default: 1035 ShouldNotReachHere(); 1036 break; 1037 } 1038 } 1039 }; 1040 1041 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1042 assert(HeapShared::is_heap_object_archiving_allowed(), 1043 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1044 1045 for (int t = 0; t <= T_VOID; t++) { 1046 oop m = Universe::_mirrors[t]; 1047 if (m != NULL) { 1048 // Update the field at _array_klass_offset to point to the relocated array klass. 1049 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1050 assert(archived_m != NULL, "sanity"); 1051 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1052 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1053 if (ak != NULL) { 1054 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1055 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1056 } 1057 1058 // Clear the fields. Just to be safe 1059 Klass *k = m->klass(); 1060 Handle archived_mirror_h(THREAD, archived_m); 1061 ResetMirrorField reset(archived_mirror_h); 1062 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1063 1064 log_trace(cds, heap, mirror)( 1065 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1066 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1067 1068 Universe::_mirrors[t] = archived_m; 1069 } 1070 } 1071 1072 assert(Universe::_mirrors[T_INT] != NULL && 1073 Universe::_mirrors[T_FLOAT] != NULL && 1074 Universe::_mirrors[T_DOUBLE] != NULL && 1075 Universe::_mirrors[T_BYTE] != NULL && 1076 Universe::_mirrors[T_BOOLEAN] != NULL && 1077 Universe::_mirrors[T_CHAR] != NULL && 1078 Universe::_mirrors[T_LONG] != NULL && 1079 Universe::_mirrors[T_SHORT] != NULL && 1080 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1081 1082 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1083 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1084 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1085 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1086 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1087 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1088 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1089 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1090 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1091 } 1092 1093 // 1094 // After the mirror object is successfully archived, the archived 1095 // klass is set with _has_archived_raw_mirror flag. 1096 // 1097 // The _has_archived_raw_mirror flag is cleared at runtime when the 1098 // archived mirror is restored. If archived java heap data cannot 1099 // be used at runtime, new mirror object is created for the shared 1100 // class. The _has_archived_raw_mirror is cleared also during the process. 1101 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1102 assert(HeapShared::is_heap_object_archiving_allowed(), 1103 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1104 1105 // Mirror is already archived 1106 if (k->has_raw_archived_mirror()) { 1107 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1108 return k->archived_java_mirror_raw(); 1109 } 1110 1111 // No mirror 1112 oop mirror = k->java_mirror(); 1113 if (mirror == NULL) { 1114 return NULL; 1115 } 1116 1117 if (k->is_instance_klass()) { 1118 InstanceKlass *ik = InstanceKlass::cast(k); 1119 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1120 1121 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1122 ik->is_shared_app_class())) { 1123 // Archiving mirror for classes from non-builtin loaders is not 1124 // supported. Clear the _java_mirror within the archived class. 1125 k->set_java_mirror_handle(NULL); 1126 return NULL; 1127 } 1128 } 1129 1130 // Now start archiving the mirror object 1131 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1132 if (archived_mirror == NULL) { 1133 return NULL; 1134 } 1135 1136 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1137 if (archived_mirror == NULL) { 1138 return NULL; 1139 } 1140 1141 k->set_archived_java_mirror_raw(archived_mirror); 1142 1143 k->set_has_raw_archived_mirror(); 1144 1145 ResourceMark rm; 1146 log_trace(cds, heap, mirror)( 1147 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1148 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1149 1150 return archived_mirror; 1151 } 1152 1153 // The process is based on create_mirror(). 1154 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1155 oop archived_mirror, 1156 Thread *THREAD) { 1157 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1158 // to archived metadata and objects below. 1159 Klass *c = archived_mirror->klass(); 1160 Handle archived_mirror_h(THREAD, archived_mirror); 1161 ResetMirrorField reset(archived_mirror_h); 1162 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1163 1164 if (k->is_array_klass()) { 1165 oop archived_comp_mirror; 1166 if (k->is_typeArray_klass()) { 1167 // The primitive type mirrors are already archived. Get the archived mirror. 1168 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1169 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1170 assert(archived_comp_mirror != NULL, "Must be"); 1171 } else { 1172 assert(k->is_objArray_klass(), "Must be"); 1173 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1174 assert(element_klass != NULL, "Must have an element klass"); 1175 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1176 if (archived_comp_mirror == NULL) { 1177 return NULL; 1178 } 1179 } 1180 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1181 } else { 1182 assert(k->is_instance_klass(), "Must be"); 1183 1184 // Reset local static fields in the mirror 1185 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1186 1187 java_lang_Class:set_init_lock(archived_mirror, NULL); 1188 1189 set_protection_domain(archived_mirror, NULL); 1190 } 1191 1192 // clear class loader and mirror_module_field 1193 set_class_loader(archived_mirror, NULL); 1194 set_module(archived_mirror, NULL); 1195 1196 // The archived mirror's field at _klass_offset is still pointing to the original 1197 // klass. Updated the field in the archived mirror to point to the relocated 1198 // klass in the archive. 1199 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1200 log_debug(cds, heap, mirror)( 1201 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1202 p2i(as_Klass(mirror)), p2i(reloc_k)); 1203 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1204 1205 // The field at _array_klass_offset is pointing to the original one dimension 1206 // higher array klass if exists. Relocate the pointer. 1207 Klass *arr = array_klass_acquire(mirror); 1208 if (arr != NULL) { 1209 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1210 log_debug(cds, heap, mirror)( 1211 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1212 p2i(arr), p2i(reloc_arr)); 1213 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1214 } 1215 return archived_mirror; 1216 } 1217 1218 // Returns true if the mirror is updated, false if no archived mirror 1219 // data is present. After the archived mirror object is restored, the 1220 // shared klass' _has_raw_archived_mirror flag is cleared. 1221 bool java_lang_Class::restore_archived_mirror(Klass *k, 1222 Handle class_loader, Handle module, 1223 Handle protection_domain, TRAPS) { 1224 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1225 // see more details in SystemDictionary::resolve_well_known_classes(). 1226 if (!SystemDictionary::Class_klass_loaded()) { 1227 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1228 fixup_mirror_list()->push(k); 1229 return true; 1230 } 1231 1232 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1233 1234 if (m == NULL) { 1235 return false; 1236 } 1237 1238 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1239 1240 // mirror is archived, restore 1241 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1242 Handle mirror(THREAD, m); 1243 1244 if (!k->is_array_klass()) { 1245 // - local static final fields with initial values were initialized at dump time 1246 1247 // create the init_lock 1248 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1249 set_init_lock(mirror(), r); 1250 1251 if (protection_domain.not_null()) { 1252 set_protection_domain(mirror(), protection_domain()); 1253 } 1254 } 1255 1256 assert(class_loader() == k->class_loader(), "should be same"); 1257 if (class_loader.not_null()) { 1258 set_class_loader(mirror(), class_loader()); 1259 } 1260 1261 k->set_java_mirror(mirror); 1262 k->clear_has_raw_archived_mirror(); 1263 1264 set_mirror_module_field(k, mirror, module, THREAD); 1265 1266 ResourceMark rm; 1267 log_trace(cds, heap, mirror)( 1268 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1269 1270 return true; 1271 } 1272 #endif // INCLUDE_CDS_JAVA_HEAP 1273 1274 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1275 assert(_module_offset != 0, "must have been computed already"); 1276 java_lang_Class::set_module(k->java_mirror(), module()); 1277 } 1278 1279 int java_lang_Class::oop_size(oop java_class) { 1280 assert(_oop_size_offset != 0, "must be set"); 1281 int size = java_class->int_field(_oop_size_offset); 1282 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1283 return size; 1284 } 1285 1286 1287 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1288 assert(_oop_size_offset != 0, "must be set"); 1289 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1290 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1291 } 1292 1293 int java_lang_Class::static_oop_field_count(oop java_class) { 1294 assert(_static_oop_field_count_offset != 0, "must be set"); 1295 return java_class->int_field(_static_oop_field_count_offset); 1296 } 1297 1298 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1299 assert(_static_oop_field_count_offset != 0, "must be set"); 1300 return java_class->int_field_raw(_static_oop_field_count_offset); 1301 } 1302 1303 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1304 assert(_static_oop_field_count_offset != 0, "must be set"); 1305 java_class->int_field_put(_static_oop_field_count_offset, size); 1306 } 1307 1308 oop java_lang_Class::protection_domain(oop java_class) { 1309 assert(_protection_domain_offset != 0, "must be set"); 1310 return java_class->obj_field(_protection_domain_offset); 1311 } 1312 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1313 assert(_protection_domain_offset != 0, "must be set"); 1314 java_class->obj_field_put(_protection_domain_offset, pd); 1315 } 1316 1317 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1318 assert(_component_mirror_offset != 0, "must be set"); 1319 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1320 } 1321 oop java_lang_Class::component_mirror(oop java_class) { 1322 assert(_component_mirror_offset != 0, "must be set"); 1323 return java_class->obj_field(_component_mirror_offset); 1324 } 1325 1326 oop java_lang_Class::init_lock(oop java_class) { 1327 assert(_init_lock_offset != 0, "must be set"); 1328 return java_class->obj_field(_init_lock_offset); 1329 } 1330 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1331 assert(_init_lock_offset != 0, "must be set"); 1332 java_class->obj_field_put(_init_lock_offset, init_lock); 1333 } 1334 1335 objArrayOop java_lang_Class::signers(oop java_class) { 1336 assert(_signers_offset != 0, "must be set"); 1337 return (objArrayOop)java_class->obj_field(_signers_offset); 1338 } 1339 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1340 assert(_signers_offset != 0, "must be set"); 1341 java_class->obj_field_put(_signers_offset, (oop)signers); 1342 } 1343 1344 1345 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1346 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1347 if (_class_loader_offset != 0) { 1348 java_class->obj_field_put(_class_loader_offset, loader); 1349 } 1350 } 1351 1352 oop java_lang_Class::class_loader(oop java_class) { 1353 assert(_class_loader_offset != 0, "must be set"); 1354 return java_class->obj_field(_class_loader_offset); 1355 } 1356 1357 oop java_lang_Class::module(oop java_class) { 1358 assert(_module_offset != 0, "must be set"); 1359 return java_class->obj_field(_module_offset); 1360 } 1361 1362 void java_lang_Class::set_module(oop java_class, oop module) { 1363 assert(_module_offset != 0, "must be set"); 1364 java_class->obj_field_put(_module_offset, module); 1365 } 1366 1367 oop java_lang_Class::name(Handle java_class, TRAPS) { 1368 assert(_name_offset != 0, "must be set"); 1369 oop o = java_class->obj_field(_name_offset); 1370 if (o == NULL) { 1371 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1372 java_class->obj_field_put(_name_offset, o); 1373 } 1374 return o; 1375 } 1376 1377 oop java_lang_Class::source_file(oop java_class) { 1378 assert(_source_file_offset != 0, "must be set"); 1379 return java_class->obj_field(_source_file_offset); 1380 } 1381 1382 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1383 assert(_source_file_offset != 0, "must be set"); 1384 java_class->obj_field_put(_source_file_offset, source_file); 1385 } 1386 1387 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1388 // This should be improved by adding a field at the Java level or by 1389 // introducing a new VM klass (see comment in ClassFileParser) 1390 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1391 if (type != T_VOID) { 1392 Klass* aklass = Universe::typeArrayKlassObj(type); 1393 assert(aklass != NULL, "correct bootstrap"); 1394 release_set_array_klass(java_class, aklass); 1395 } 1396 #ifdef ASSERT 1397 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1398 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1399 #endif 1400 return java_class; 1401 } 1402 1403 1404 Klass* java_lang_Class::as_Klass(oop java_class) { 1405 //%note memory_2 1406 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1407 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1408 assert(k == NULL || k->is_klass(), "type check"); 1409 return k; 1410 } 1411 1412 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1413 //%note memory_2 1414 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1415 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1416 assert(k == NULL || k->is_klass(), "type check"); 1417 return k; 1418 } 1419 1420 1421 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1422 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1423 java_class->metadata_field_put(_klass_offset, klass); 1424 } 1425 1426 1427 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1428 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1429 Symbol* name = NULL; 1430 bool is_instance = false; 1431 if (is_primitive(java_class)) { 1432 name = vmSymbols::type_signature(primitive_type(java_class)); 1433 } else { 1434 Klass* k = as_Klass(java_class); 1435 is_instance = k->is_instance_klass(); 1436 name = k->name(); 1437 } 1438 if (name == NULL) { 1439 st->print("<null>"); 1440 return; 1441 } 1442 if (is_instance) st->print("L"); 1443 st->write((char*) name->base(), (int) name->utf8_length()); 1444 if (is_instance) st->print(";"); 1445 } 1446 1447 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1448 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1449 Symbol* name; 1450 if (is_primitive(java_class)) { 1451 name = vmSymbols::type_signature(primitive_type(java_class)); 1452 // Because this can create a new symbol, the caller has to decrement 1453 // the refcount, so make adjustment here and below for symbols returned 1454 // that are not created or incremented due to a successful lookup. 1455 name->increment_refcount(); 1456 } else { 1457 Klass* k = as_Klass(java_class); 1458 if (!k->is_instance_klass()) { 1459 name = k->name(); 1460 name->increment_refcount(); 1461 } else { 1462 ResourceMark rm; 1463 const char* sigstr = k->signature_name(); 1464 int siglen = (int) strlen(sigstr); 1465 if (!intern_if_not_found) { 1466 name = SymbolTable::probe(sigstr, siglen); 1467 } else { 1468 name = SymbolTable::new_symbol(sigstr, siglen); 1469 } 1470 } 1471 } 1472 return name; 1473 } 1474 1475 // Returns the Java name for this Java mirror (Resource allocated) 1476 // See Klass::external_name(). 1477 // For primitive type Java mirrors, its type name is returned. 1478 const char* java_lang_Class::as_external_name(oop java_class) { 1479 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1480 const char* name = NULL; 1481 if (is_primitive(java_class)) { 1482 name = type2name(primitive_type(java_class)); 1483 } else { 1484 name = as_Klass(java_class)->external_name(); 1485 } 1486 if (name == NULL) { 1487 name = "<null>"; 1488 } 1489 return name; 1490 } 1491 1492 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1493 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1494 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1495 return k; 1496 } 1497 1498 1499 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1500 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1501 java_class->release_metadata_field_put(_array_klass_offset, klass); 1502 } 1503 1504 1505 BasicType java_lang_Class::primitive_type(oop java_class) { 1506 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1507 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1508 BasicType type = T_VOID; 1509 if (ak != NULL) { 1510 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1511 type = ArrayKlass::cast(ak)->element_type(); 1512 } else { 1513 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1514 } 1515 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1516 return type; 1517 } 1518 1519 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1520 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1521 if (is_primitive(java_class)) { 1522 if (reference_klass != NULL) 1523 (*reference_klass) = NULL; 1524 return primitive_type(java_class); 1525 } else { 1526 if (reference_klass != NULL) 1527 (*reference_klass) = as_Klass(java_class); 1528 return T_OBJECT; 1529 } 1530 } 1531 1532 1533 oop java_lang_Class::primitive_mirror(BasicType t) { 1534 oop mirror = Universe::java_mirror(t); 1535 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1536 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1537 return mirror; 1538 } 1539 1540 bool java_lang_Class::offsets_computed = false; 1541 int java_lang_Class::classRedefinedCount_offset = -1; 1542 1543 #define CLASS_FIELDS_DO(macro) \ 1544 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1545 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1546 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1547 macro(_module_offset, k, "module", module_signature, false); \ 1548 macro(_name_offset, k, "name", string_signature, false); \ 1549 1550 void java_lang_Class::compute_offsets() { 1551 if (offsets_computed) { 1552 return; 1553 } 1554 1555 offsets_computed = true; 1556 1557 InstanceKlass* k = SystemDictionary::Class_klass(); 1558 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1559 1560 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1561 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1562 // GC treats them the same. 1563 _init_lock_offset = _component_mirror_offset; 1564 1565 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1566 } 1567 1568 #if INCLUDE_CDS 1569 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1570 f->do_bool(&offsets_computed); 1571 f->do_u4((u4*)&_init_lock_offset); 1572 1573 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1574 1575 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1576 } 1577 #endif 1578 1579 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1580 if (classRedefinedCount_offset == -1) { 1581 // If we don't have an offset for it then just return -1 as a marker. 1582 return -1; 1583 } 1584 1585 return the_class_mirror->int_field(classRedefinedCount_offset); 1586 } 1587 1588 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1589 if (classRedefinedCount_offset == -1) { 1590 // If we don't have an offset for it then nothing to set. 1591 return; 1592 } 1593 1594 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1595 } 1596 1597 1598 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1599 // platform thread structure, and a eetop offset which was used for thread 1600 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1601 // merged, so in the HotSpot VM we just use the eetop field for the thread 1602 // instead of the privateInfo_offset. 1603 // 1604 // Note: The stackSize field is only present starting in 1.4. 1605 1606 int java_lang_Thread::_name_offset = 0; 1607 int java_lang_Thread::_group_offset = 0; 1608 int java_lang_Thread::_contextClassLoader_offset = 0; 1609 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1610 int java_lang_Thread::_priority_offset = 0; 1611 int java_lang_Thread::_eetop_offset = 0; 1612 int java_lang_Thread::_daemon_offset = 0; 1613 int java_lang_Thread::_stillborn_offset = 0; 1614 int java_lang_Thread::_stackSize_offset = 0; 1615 int java_lang_Thread::_tid_offset = 0; 1616 int java_lang_Thread::_thread_status_offset = 0; 1617 int java_lang_Thread::_park_blocker_offset = 0; 1618 1619 #define THREAD_FIELDS_DO(macro) \ 1620 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1621 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1622 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1623 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1624 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1625 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1626 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1627 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1628 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1629 macro(_tid_offset, k, "tid", long_signature, false); \ 1630 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1631 macro(_park_blocker_offset, k, "parkBlocker", object_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 return java_thread->long_field(_stackSize_offset); 1718 } 1719 1720 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1721 void java_lang_Thread::set_thread_status(oop java_thread, 1722 java_lang_Thread::ThreadStatus status) { 1723 java_thread->int_field_put(_thread_status_offset, status); 1724 } 1725 1726 // Read thread status value from threadStatus field in java.lang.Thread java class. 1727 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1728 // Make sure the caller is operating on behalf of the VM or is 1729 // running VM code (state == _thread_in_vm). 1730 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1731 JavaThread::current()->thread_state() == _thread_in_vm, 1732 "Java Thread is not running in vm"); 1733 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1734 } 1735 1736 1737 jlong java_lang_Thread::thread_id(oop java_thread) { 1738 return java_thread->long_field(_tid_offset); 1739 } 1740 1741 oop java_lang_Thread::park_blocker(oop java_thread) { 1742 return java_thread->obj_field(_park_blocker_offset); 1743 } 1744 1745 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1746 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1747 switch (status) { 1748 case NEW : return "NEW"; 1749 case RUNNABLE : return "RUNNABLE"; 1750 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1751 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1752 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1753 case PARKED : return "WAITING (parking)"; 1754 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1755 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1756 case TERMINATED : return "TERMINATED"; 1757 default : return "UNKNOWN"; 1758 }; 1759 } 1760 int java_lang_ThreadGroup::_parent_offset = 0; 1761 int java_lang_ThreadGroup::_name_offset = 0; 1762 int java_lang_ThreadGroup::_threads_offset = 0; 1763 int java_lang_ThreadGroup::_groups_offset = 0; 1764 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1765 int java_lang_ThreadGroup::_destroyed_offset = 0; 1766 int java_lang_ThreadGroup::_daemon_offset = 0; 1767 int java_lang_ThreadGroup::_nthreads_offset = 0; 1768 int java_lang_ThreadGroup::_ngroups_offset = 0; 1769 1770 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1771 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1772 return java_thread_group->obj_field(_parent_offset); 1773 } 1774 1775 // ("name as oop" accessor is not necessary) 1776 1777 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1778 oop name = java_thread_group->obj_field(_name_offset); 1779 // ThreadGroup.name can be null 1780 if (name != NULL) { 1781 return java_lang_String::as_utf8_string(name); 1782 } 1783 return NULL; 1784 } 1785 1786 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1787 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1788 return java_thread_group->int_field(_nthreads_offset); 1789 } 1790 1791 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1792 oop threads = java_thread_group->obj_field(_threads_offset); 1793 assert(threads != NULL, "threadgroups should have threads"); 1794 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1795 return objArrayOop(threads); 1796 } 1797 1798 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1799 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1800 return java_thread_group->int_field(_ngroups_offset); 1801 } 1802 1803 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1804 oop groups = java_thread_group->obj_field(_groups_offset); 1805 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1806 return objArrayOop(groups); 1807 } 1808 1809 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1810 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1811 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1812 } 1813 1814 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1815 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1816 return java_thread_group->bool_field(_destroyed_offset) != 0; 1817 } 1818 1819 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1820 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1821 return java_thread_group->bool_field(_daemon_offset) != 0; 1822 } 1823 1824 #define THREADGROUP_FIELDS_DO(macro) \ 1825 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1826 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1827 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1828 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1829 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1830 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1831 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1832 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1833 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1834 1835 void java_lang_ThreadGroup::compute_offsets() { 1836 assert(_parent_offset == 0, "offsets should be initialized only once"); 1837 1838 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1839 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1840 } 1841 1842 #if INCLUDE_CDS 1843 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1844 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1845 } 1846 #endif 1847 1848 #define THROWABLE_FIELDS_DO(macro) \ 1849 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1850 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1851 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1852 macro(depth_offset, k, "depth", int_signature, false); \ 1853 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1854 1855 void java_lang_Throwable::compute_offsets() { 1856 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1857 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1858 } 1859 1860 #if INCLUDE_CDS 1861 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1862 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1863 } 1864 #endif 1865 1866 oop java_lang_Throwable::unassigned_stacktrace() { 1867 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1868 oop base = ik->static_field_base_raw(); 1869 return base->obj_field(static_unassigned_stacktrace_offset); 1870 } 1871 1872 oop java_lang_Throwable::backtrace(oop throwable) { 1873 return throwable->obj_field_acquire(backtrace_offset); 1874 } 1875 1876 1877 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1878 throwable->release_obj_field_put(backtrace_offset, value); 1879 } 1880 1881 int java_lang_Throwable::depth(oop throwable) { 1882 return throwable->int_field(depth_offset); 1883 } 1884 1885 void java_lang_Throwable::set_depth(oop throwable, int value) { 1886 throwable->int_field_put(depth_offset, value); 1887 } 1888 1889 oop java_lang_Throwable::message(oop throwable) { 1890 return throwable->obj_field(detailMessage_offset); 1891 } 1892 1893 1894 // Return Symbol for detailed_message or NULL 1895 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1896 PRESERVE_EXCEPTION_MARK; // Keep original exception 1897 oop detailed_message = java_lang_Throwable::message(throwable); 1898 if (detailed_message != NULL) { 1899 return java_lang_String::as_symbol(detailed_message); 1900 } 1901 return NULL; 1902 } 1903 1904 void java_lang_Throwable::set_message(oop throwable, oop value) { 1905 throwable->obj_field_put(detailMessage_offset, value); 1906 } 1907 1908 1909 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1910 throwable->obj_field_put(stackTrace_offset, st_element_array); 1911 } 1912 1913 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1914 set_stacktrace(throwable, NULL); 1915 } 1916 1917 1918 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1919 ResourceMark rm; 1920 Klass* k = throwable->klass(); 1921 assert(k != NULL, "just checking"); 1922 st->print("%s", k->external_name()); 1923 oop msg = message(throwable); 1924 if (msg != NULL) { 1925 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1926 } 1927 } 1928 1929 // After this many redefines, the stack trace is unreliable. 1930 const int MAX_VERSION = USHRT_MAX; 1931 1932 static inline bool version_matches(Method* method, int version) { 1933 assert(version < MAX_VERSION, "version is too big"); 1934 return method != NULL && (method->constants()->version() == version); 1935 } 1936 1937 1938 // This class provides a simple wrapper over the internal structure of 1939 // exception backtrace to insulate users of the backtrace from needing 1940 // to know what it looks like. 1941 class BacktraceBuilder: public StackObj { 1942 friend class BacktraceIterator; 1943 private: 1944 Handle _backtrace; 1945 objArrayOop _head; 1946 typeArrayOop _methods; 1947 typeArrayOop _bcis; 1948 objArrayOop _mirrors; 1949 typeArrayOop _names; // needed to insulate method name against redefinition 1950 int _index; 1951 NoSafepointVerifier _nsv; 1952 1953 enum { 1954 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1955 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1956 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1957 trace_names_offset = java_lang_Throwable::trace_names_offset, 1958 trace_next_offset = java_lang_Throwable::trace_next_offset, 1959 trace_size = java_lang_Throwable::trace_size, 1960 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1961 }; 1962 1963 // get info out of chunks 1964 static typeArrayOop get_methods(objArrayHandle chunk) { 1965 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1966 assert(methods != NULL, "method array should be initialized in backtrace"); 1967 return methods; 1968 } 1969 static typeArrayOop get_bcis(objArrayHandle chunk) { 1970 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1971 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1972 return bcis; 1973 } 1974 static objArrayOop get_mirrors(objArrayHandle chunk) { 1975 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1976 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1977 return mirrors; 1978 } 1979 static typeArrayOop get_names(objArrayHandle chunk) { 1980 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1981 assert(names != NULL, "names array should be initialized in backtrace"); 1982 return names; 1983 } 1984 1985 public: 1986 1987 // constructor for new backtrace 1988 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 1989 expand(CHECK); 1990 _backtrace = Handle(THREAD, _head); 1991 _index = 0; 1992 } 1993 1994 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1995 _methods = get_methods(backtrace); 1996 _bcis = get_bcis(backtrace); 1997 _mirrors = get_mirrors(backtrace); 1998 _names = get_names(backtrace); 1999 assert(_methods->length() == _bcis->length() && 2000 _methods->length() == _mirrors->length() && 2001 _mirrors->length() == _names->length(), 2002 "method and source information arrays should match"); 2003 2004 // head is the preallocated backtrace 2005 _head = backtrace(); 2006 _backtrace = Handle(thread, _head); 2007 _index = 0; 2008 } 2009 2010 void expand(TRAPS) { 2011 objArrayHandle old_head(THREAD, _head); 2012 PauseNoSafepointVerifier pnsv(&_nsv); 2013 2014 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2015 objArrayHandle new_head(THREAD, head); 2016 2017 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2018 typeArrayHandle new_methods(THREAD, methods); 2019 2020 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2021 typeArrayHandle new_bcis(THREAD, bcis); 2022 2023 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2024 objArrayHandle new_mirrors(THREAD, mirrors); 2025 2026 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2027 typeArrayHandle new_names(THREAD, names); 2028 2029 if (!old_head.is_null()) { 2030 old_head->obj_at_put(trace_next_offset, new_head()); 2031 } 2032 new_head->obj_at_put(trace_methods_offset, new_methods()); 2033 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2034 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2035 new_head->obj_at_put(trace_names_offset, new_names()); 2036 2037 _head = new_head(); 2038 _methods = new_methods(); 2039 _bcis = new_bcis(); 2040 _mirrors = new_mirrors(); 2041 _names = new_names(); 2042 _index = 0; 2043 } 2044 2045 oop backtrace() { 2046 return _backtrace(); 2047 } 2048 2049 inline void push(Method* method, int bci, TRAPS) { 2050 // Smear the -1 bci to 0 since the array only holds unsigned 2051 // shorts. The later line number lookup would just smear the -1 2052 // to a 0 even if it could be recorded. 2053 if (bci == SynchronizationEntryBCI) bci = 0; 2054 2055 if (_index >= trace_chunk_size) { 2056 methodHandle mhandle(THREAD, method); 2057 expand(CHECK); 2058 method = mhandle(); 2059 } 2060 2061 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2062 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2063 2064 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2065 // klass owning the symbols alive so their refcounts aren't decremented. 2066 Symbol* name = method->name(); 2067 _names->symbol_at_put(_index, name); 2068 2069 // We need to save the mirrors in the backtrace to keep the class 2070 // from being unloaded while we still have this stack trace. 2071 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2072 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2073 _index++; 2074 } 2075 2076 }; 2077 2078 struct BacktraceElement : public StackObj { 2079 int _method_id; 2080 int _bci; 2081 int _version; 2082 Symbol* _name; 2083 Handle _mirror; 2084 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2085 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2086 }; 2087 2088 class BacktraceIterator : public StackObj { 2089 int _index; 2090 objArrayHandle _result; 2091 objArrayHandle _mirrors; 2092 typeArrayHandle _methods; 2093 typeArrayHandle _bcis; 2094 typeArrayHandle _names; 2095 2096 void init(objArrayHandle result, Thread* thread) { 2097 // Get method id, bci, version and mirror from chunk 2098 _result = result; 2099 if (_result.not_null()) { 2100 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2101 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2102 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2103 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2104 _index = 0; 2105 } 2106 } 2107 public: 2108 BacktraceIterator(objArrayHandle result, Thread* thread) { 2109 init(result, thread); 2110 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2111 } 2112 2113 BacktraceElement next(Thread* thread) { 2114 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2115 _methods->ushort_at(_index), 2116 Backtrace::version_at(_bcis->int_at(_index)), 2117 Backtrace::bci_at(_bcis->int_at(_index)), 2118 _names->symbol_at(_index)); 2119 _index++; 2120 2121 if (_index >= java_lang_Throwable::trace_chunk_size) { 2122 int next_offset = java_lang_Throwable::trace_next_offset; 2123 // Get next chunk 2124 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2125 init(result, thread); 2126 } 2127 return e; 2128 } 2129 2130 bool repeat() { 2131 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2132 } 2133 }; 2134 2135 2136 // Print stack trace element to resource allocated buffer 2137 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2138 int version, int bci, Symbol* name) { 2139 ResourceMark rm; 2140 2141 // Get strings and string lengths 2142 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2143 const char* klass_name = holder->external_name(); 2144 int buf_len = (int)strlen(klass_name); 2145 2146 char* method_name = name->as_C_string(); 2147 buf_len += (int)strlen(method_name); 2148 2149 char* source_file_name = NULL; 2150 Symbol* source = Backtrace::get_source_file_name(holder, version); 2151 if (source != NULL) { 2152 source_file_name = source->as_C_string(); 2153 buf_len += (int)strlen(source_file_name); 2154 } 2155 2156 char *module_name = NULL, *module_version = NULL; 2157 ModuleEntry* module = holder->module(); 2158 if (module->is_named()) { 2159 module_name = module->name()->as_C_string(); 2160 buf_len += (int)strlen(module_name); 2161 if (module->version() != NULL) { 2162 module_version = module->version()->as_C_string(); 2163 buf_len += (int)strlen(module_version); 2164 } 2165 } 2166 2167 // Allocate temporary buffer with extra space for formatting and line number 2168 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2169 2170 // Print stack trace line in buffer 2171 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2172 2173 // Print module information 2174 if (module_name != NULL) { 2175 if (module_version != NULL) { 2176 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2177 } else { 2178 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2179 } 2180 } 2181 2182 // The method can be NULL if the requested class version is gone 2183 Method* method = holder->method_with_orig_idnum(method_id, version); 2184 if (!version_matches(method, version)) { 2185 strcat(buf, "Redefined)"); 2186 } else { 2187 int line_number = Backtrace::get_line_number(method, bci); 2188 if (line_number == -2) { 2189 strcat(buf, "Native Method)"); 2190 } else { 2191 if (source_file_name != NULL && (line_number != -1)) { 2192 // Sourcename and linenumber 2193 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2194 } else if (source_file_name != NULL) { 2195 // Just sourcename 2196 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2197 } else { 2198 // Neither sourcename nor linenumber 2199 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2200 } 2201 CompiledMethod* nm = method->code(); 2202 if (WizardMode && nm != NULL) { 2203 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2204 } 2205 } 2206 } 2207 2208 st->print_cr("%s", buf); 2209 } 2210 2211 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2212 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2213 int method_id = method->orig_method_idnum(); 2214 int version = method->constants()->version(); 2215 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2216 } 2217 2218 /** 2219 * Print the throwable message and its stack trace plus all causes by walking the 2220 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2221 */ 2222 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2223 // First, print the message. 2224 print(throwable(), st); 2225 st->cr(); 2226 2227 // Now print the stack trace. 2228 Thread* THREAD = Thread::current(); 2229 while (throwable.not_null()) { 2230 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2231 if (result.is_null()) { 2232 st->print_raw_cr("\t<<no stack trace available>>"); 2233 return; 2234 } 2235 BacktraceIterator iter(result, THREAD); 2236 2237 while (iter.repeat()) { 2238 BacktraceElement bte = iter.next(THREAD); 2239 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2240 } 2241 { 2242 // Call getCause() which doesn't necessarily return the _cause field. 2243 EXCEPTION_MARK; 2244 JavaValue cause(T_OBJECT); 2245 JavaCalls::call_virtual(&cause, 2246 throwable, 2247 throwable->klass(), 2248 vmSymbols::getCause_name(), 2249 vmSymbols::void_throwable_signature(), 2250 THREAD); 2251 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2252 if (HAS_PENDING_EXCEPTION) { 2253 CLEAR_PENDING_EXCEPTION; 2254 throwable = Handle(); 2255 } else { 2256 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2257 if (throwable.not_null()) { 2258 st->print("Caused by: "); 2259 print(throwable(), st); 2260 st->cr(); 2261 } 2262 } 2263 } 2264 } 2265 } 2266 2267 /** 2268 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2269 */ 2270 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2271 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2272 JavaValue result(T_VOID); 2273 JavaCalls::call_virtual(&result, 2274 throwable, 2275 SystemDictionary::Throwable_klass(), 2276 vmSymbols::printStackTrace_name(), 2277 vmSymbols::void_method_signature(), 2278 THREAD); 2279 } 2280 2281 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2282 if (!StackTraceInThrowable) return; 2283 ResourceMark rm(THREAD); 2284 2285 // Start out by clearing the backtrace for this object, in case the VM 2286 // runs out of memory while allocating the stack trace 2287 set_backtrace(throwable(), NULL); 2288 // Clear lazily constructed Java level stacktrace if refilling occurs 2289 // This is unnecessary in 1.7+ but harmless 2290 clear_stacktrace(throwable()); 2291 2292 int max_depth = MaxJavaStackTraceDepth; 2293 JavaThread* thread = (JavaThread*)THREAD; 2294 2295 BacktraceBuilder bt(CHECK); 2296 2297 // If there is no Java frame just return the method that was being called 2298 // with bci 0 2299 if (!thread->has_last_Java_frame()) { 2300 if (max_depth >= 1 && method() != NULL) { 2301 bt.push(method(), 0, CHECK); 2302 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2303 set_depth(throwable(), 1); 2304 set_backtrace(throwable(), bt.backtrace()); 2305 } 2306 return; 2307 } 2308 2309 // Instead of using vframe directly, this version of fill_in_stack_trace 2310 // basically handles everything by hand. This significantly improved the 2311 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2312 // See bug 6333838 for more details. 2313 // The "ASSERT" here is to verify this method generates the exactly same stack 2314 // trace as utilizing vframe. 2315 #ifdef ASSERT 2316 vframeStream st(thread); 2317 methodHandle st_method(THREAD, st.method()); 2318 #endif 2319 int total_count = 0; 2320 RegisterMap map(thread, false); 2321 int decode_offset = 0; 2322 CompiledMethod* nm = NULL; 2323 bool skip_fillInStackTrace_check = false; 2324 bool skip_throwableInit_check = false; 2325 bool skip_hidden = !ShowHiddenFrames; 2326 2327 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2328 Method* method = NULL; 2329 int bci = 0; 2330 2331 // Compiled java method case. 2332 if (decode_offset != 0) { 2333 DebugInfoReadStream stream(nm, decode_offset); 2334 decode_offset = stream.read_int(); 2335 method = (Method*)nm->metadata_at(stream.read_int()); 2336 bci = stream.read_bci(); 2337 } else { 2338 if (fr.is_first_frame()) break; 2339 address pc = fr.pc(); 2340 if (fr.is_interpreted_frame()) { 2341 address bcp = fr.interpreter_frame_bcp(); 2342 method = fr.interpreter_frame_method(); 2343 bci = method->bci_from(bcp); 2344 fr = fr.sender(&map); 2345 } else { 2346 CodeBlob* cb = fr.cb(); 2347 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2348 // but non nmethod 2349 fr = fr.sender(&map); 2350 if (cb == NULL || !cb->is_compiled()) { 2351 continue; 2352 } 2353 nm = cb->as_compiled_method(); 2354 if (nm->method()->is_native()) { 2355 method = nm->method(); 2356 bci = 0; 2357 } else { 2358 PcDesc* pd = nm->pc_desc_at(pc); 2359 decode_offset = pd->scope_decode_offset(); 2360 // if decode_offset is not equal to 0, it will execute the 2361 // "compiled java method case" at the beginning of the loop. 2362 continue; 2363 } 2364 } 2365 } 2366 #ifdef ASSERT 2367 assert(st_method() == method && st.bci() == bci, 2368 "Wrong stack trace"); 2369 st.next(); 2370 // vframeStream::method isn't GC-safe so store off a copy 2371 // of the Method* in case we GC. 2372 if (!st.at_end()) { 2373 st_method = st.method(); 2374 } 2375 #endif 2376 2377 // the format of the stacktrace will be: 2378 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2379 // - 0 or more <init> methods for the exception class (skipped) 2380 // - rest of the stack 2381 2382 if (!skip_fillInStackTrace_check) { 2383 if (method->name() == vmSymbols::fillInStackTrace_name() && 2384 throwable->is_a(method->method_holder())) { 2385 continue; 2386 } 2387 else { 2388 skip_fillInStackTrace_check = true; // gone past them all 2389 } 2390 } 2391 if (!skip_throwableInit_check) { 2392 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2393 2394 // skip <init> methods of the exception class and superclasses 2395 // This is simlar to classic VM. 2396 if (method->name() == vmSymbols::object_initializer_name() && 2397 throwable->is_a(method->method_holder())) { 2398 continue; 2399 } else { 2400 // there are none or we've seen them all - either way stop checking 2401 skip_throwableInit_check = true; 2402 } 2403 } 2404 if (method->is_hidden()) { 2405 if (skip_hidden) continue; 2406 } 2407 bt.push(method, bci, CHECK); 2408 total_count++; 2409 } 2410 2411 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2412 2413 // Put completed stack trace into throwable object 2414 set_backtrace(throwable(), bt.backtrace()); 2415 set_depth(throwable(), total_count); 2416 } 2417 2418 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2419 // No-op if stack trace is disabled 2420 if (!StackTraceInThrowable) { 2421 return; 2422 } 2423 2424 // Disable stack traces for some preallocated out of memory errors 2425 if (!Universe::should_fill_in_stack_trace(throwable)) { 2426 return; 2427 } 2428 2429 PRESERVE_EXCEPTION_MARK; 2430 2431 JavaThread* thread = JavaThread::active(); 2432 fill_in_stack_trace(throwable, method, thread); 2433 // ignore exceptions thrown during stack trace filling 2434 CLEAR_PENDING_EXCEPTION; 2435 } 2436 2437 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2438 // Allocate stack trace - backtrace is created but not filled in 2439 2440 // No-op if stack trace is disabled 2441 if (!StackTraceInThrowable) return; 2442 BacktraceBuilder bt(CHECK); // creates a backtrace 2443 set_backtrace(throwable(), bt.backtrace()); 2444 } 2445 2446 2447 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2448 // Fill in stack trace into preallocated backtrace (no GC) 2449 2450 // No-op if stack trace is disabled 2451 if (!StackTraceInThrowable) return; 2452 2453 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2454 2455 JavaThread* THREAD = JavaThread::current(); 2456 2457 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2458 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2459 2460 ResourceMark rm(THREAD); 2461 vframeStream st(THREAD); 2462 2463 BacktraceBuilder bt(THREAD, backtrace); 2464 2465 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2466 // methods as preallocated errors aren't created by "java" code. 2467 2468 // fill in as much stack trace as possible 2469 int chunk_count = 0; 2470 for (;!st.at_end(); st.next()) { 2471 bt.push(st.method(), st.bci(), CHECK); 2472 chunk_count++; 2473 2474 // Bail-out for deep stacks 2475 if (chunk_count >= trace_chunk_size) break; 2476 } 2477 set_depth(throwable(), chunk_count); 2478 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2479 2480 // We support the Throwable immutability protocol defined for Java 7. 2481 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2482 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2483 } 2484 2485 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2486 objArrayHandle stack_trace_array_h, TRAPS) { 2487 2488 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2489 THROW(vmSymbols::java_lang_NullPointerException()); 2490 } 2491 2492 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2493 2494 if (stack_trace_array_h->length() != depth(throwable())) { 2495 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2496 } 2497 2498 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2499 BacktraceIterator iter(result, THREAD); 2500 2501 int index = 0; 2502 while (iter.repeat()) { 2503 BacktraceElement bte = iter.next(THREAD); 2504 2505 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2506 2507 if (stack_trace_element.is_null()) { 2508 THROW(vmSymbols::java_lang_NullPointerException()); 2509 } 2510 2511 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2512 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2513 2514 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2515 method, 2516 bte._version, 2517 bte._bci, 2518 bte._name, CHECK); 2519 } 2520 } 2521 2522 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2523 // Allocate java.lang.StackTraceElement instance 2524 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2525 assert(k != NULL, "must be loaded in 1.4+"); 2526 if (k->should_be_initialized()) { 2527 k->initialize(CHECK_0); 2528 } 2529 2530 Handle element = k->allocate_instance_handle(CHECK_0); 2531 2532 int version = method->constants()->version(); 2533 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2534 return element(); 2535 } 2536 2537 void java_lang_StackTraceElement::fill_in(Handle element, 2538 InstanceKlass* holder, const methodHandle& method, 2539 int version, int bci, Symbol* name, TRAPS) { 2540 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2541 2542 ResourceMark rm(THREAD); 2543 HandleMark hm(THREAD); 2544 2545 // Fill in class name 2546 Handle java_class(THREAD, holder->java_mirror()); 2547 oop classname = java_lang_Class::name(java_class, CHECK); 2548 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2549 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2550 2551 oop loader = holder->class_loader(); 2552 if (loader != NULL) { 2553 oop loader_name = java_lang_ClassLoader::name(loader); 2554 if (loader_name != NULL) 2555 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2556 } 2557 2558 // Fill in method name 2559 oop methodname = StringTable::intern(name, CHECK); 2560 java_lang_StackTraceElement::set_methodName(element(), methodname); 2561 2562 // Fill in module name and version 2563 ModuleEntry* module = holder->module(); 2564 if (module->is_named()) { 2565 oop module_name = StringTable::intern(module->name(), CHECK); 2566 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2567 oop module_version; 2568 if (module->version() != NULL) { 2569 module_version = StringTable::intern(module->version(), CHECK); 2570 } else { 2571 module_version = NULL; 2572 } 2573 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2574 } 2575 2576 if (method() == NULL || !version_matches(method(), version)) { 2577 // The method was redefined, accurate line number information isn't available 2578 java_lang_StackTraceElement::set_fileName(element(), NULL); 2579 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2580 } else { 2581 // Fill in source file name and line number. 2582 Symbol* source = Backtrace::get_source_file_name(holder, version); 2583 oop source_file = java_lang_Class::source_file(java_class()); 2584 if (source != NULL) { 2585 // Class was not redefined. We can trust its cache if set, 2586 // else we have to initialize it. 2587 if (source_file == NULL) { 2588 source_file = StringTable::intern(source, CHECK); 2589 java_lang_Class::set_source_file(java_class(), source_file); 2590 } 2591 } else { 2592 // Class was redefined. Dump the cache if it was set. 2593 if (source_file != NULL) { 2594 source_file = NULL; 2595 java_lang_Class::set_source_file(java_class(), source_file); 2596 } 2597 } 2598 java_lang_StackTraceElement::set_fileName(element(), source_file); 2599 2600 int line_number = Backtrace::get_line_number(method, bci); 2601 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2602 } 2603 } 2604 2605 #if INCLUDE_JVMCI 2606 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) { 2607 int method_id = method->orig_method_idnum(); 2608 int cpref = method->name_index(); 2609 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number); 2610 } 2611 2612 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) { 2613 // Fill in class name 2614 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2615 Method* method = holder->method_with_orig_idnum(method_id, version); 2616 2617 // The method can be NULL if the requested class version is gone 2618 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2619 2620 // Fill in method name 2621 methodname = sym; 2622 2623 if (!version_matches(method, version)) { 2624 // If the method was redefined, accurate line number information isn't available 2625 filename = NULL; 2626 line_number = -1; 2627 } else { 2628 // Fill in source file name and line number. 2629 // Use a specific ik version as a holder since the mirror might 2630 // refer to a version that is now obsolete and no longer accessible 2631 // via the previous versions list. 2632 holder = holder->get_klass_version(version); 2633 assert(holder != NULL, "sanity check"); 2634 filename = holder->source_file_name(); 2635 line_number = Backtrace::get_line_number(method, bci); 2636 } 2637 } 2638 #endif // INCLUDE_JVMCI 2639 2640 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2641 HandleMark hm(THREAD); 2642 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2643 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2644 // we should expand MemberName::name when Throwable uses StackTrace 2645 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2646 return method; 2647 } 2648 2649 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2650 // set Method* or mid/cpref 2651 HandleMark hm(THREAD); 2652 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2653 InstanceKlass* ik = method->method_holder(); 2654 CallInfo info(method(), ik, CHECK); 2655 MethodHandles::init_method_MemberName(mname, info); 2656 // set bci 2657 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2658 // method may be redefined; store the version 2659 int version = method->constants()->version(); 2660 assert((jushort)version == version, "version should be short"); 2661 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2662 } 2663 2664 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2665 ResourceMark rm(THREAD); 2666 HandleMark hm(THREAD); 2667 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2668 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2669 InstanceKlass* holder = InstanceKlass::cast(clazz); 2670 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2671 2672 short version = stackFrame->short_field(_version_offset); 2673 int bci = stackFrame->int_field(_bci_offset); 2674 Symbol* name = method->name(); 2675 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2676 } 2677 2678 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2679 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2680 macro(_bci_offset, k, "bci", int_signature, false) 2681 2682 void java_lang_StackFrameInfo::compute_offsets() { 2683 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2684 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2685 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2686 } 2687 2688 #if INCLUDE_CDS 2689 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2690 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2691 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2692 } 2693 #endif 2694 2695 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2696 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2697 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2698 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2699 macro(_mode_offset, k, "mode", int_signature, false) 2700 2701 void java_lang_LiveStackFrameInfo::compute_offsets() { 2702 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2703 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2704 } 2705 2706 #if INCLUDE_CDS 2707 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2708 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2709 } 2710 #endif 2711 2712 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2713 macro(override_offset, k, "override", bool_signature, false) 2714 2715 void java_lang_reflect_AccessibleObject::compute_offsets() { 2716 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2717 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2718 } 2719 2720 #if INCLUDE_CDS 2721 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2722 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2723 } 2724 #endif 2725 2726 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2728 return (jboolean) reflect->bool_field(override_offset); 2729 } 2730 2731 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2733 reflect->bool_field_put(override_offset, (int) value); 2734 } 2735 2736 #define METHOD_FIELDS_DO(macro) \ 2737 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2738 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2739 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2740 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2741 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2742 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2743 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2744 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2745 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2746 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2747 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2748 2749 void java_lang_reflect_Method::compute_offsets() { 2750 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2751 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2752 } 2753 2754 #if INCLUDE_CDS 2755 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2756 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2757 } 2758 #endif 2759 2760 Handle java_lang_reflect_Method::create(TRAPS) { 2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2762 Klass* klass = SystemDictionary::reflect_Method_klass(); 2763 // This class is eagerly initialized during VM initialization, since we keep a refence 2764 // to one of the methods 2765 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2766 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2767 } 2768 2769 oop java_lang_reflect_Method::clazz(oop reflect) { 2770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2771 return reflect->obj_field(clazz_offset); 2772 } 2773 2774 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2776 reflect->obj_field_put(clazz_offset, value); 2777 } 2778 2779 int java_lang_reflect_Method::slot(oop reflect) { 2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2781 return reflect->int_field(slot_offset); 2782 } 2783 2784 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2786 reflect->int_field_put(slot_offset, value); 2787 } 2788 2789 void java_lang_reflect_Method::set_name(oop method, oop value) { 2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2791 method->obj_field_put(name_offset, value); 2792 } 2793 2794 oop java_lang_reflect_Method::return_type(oop method) { 2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2796 return method->obj_field(returnType_offset); 2797 } 2798 2799 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2801 method->obj_field_put(returnType_offset, value); 2802 } 2803 2804 oop java_lang_reflect_Method::parameter_types(oop method) { 2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2806 return method->obj_field(parameterTypes_offset); 2807 } 2808 2809 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2811 method->obj_field_put(parameterTypes_offset, value); 2812 } 2813 2814 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2816 method->obj_field_put(exceptionTypes_offset, value); 2817 } 2818 2819 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2821 method->int_field_put(modifiers_offset, value); 2822 } 2823 2824 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2826 method->obj_field_put(signature_offset, value); 2827 } 2828 2829 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2831 method->obj_field_put(annotations_offset, value); 2832 } 2833 2834 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2836 method->obj_field_put(parameter_annotations_offset, value); 2837 } 2838 2839 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2841 method->obj_field_put(annotation_default_offset, value); 2842 } 2843 2844 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2845 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2846 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2847 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2848 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2849 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2850 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2851 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2852 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2853 2854 void java_lang_reflect_Constructor::compute_offsets() { 2855 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2856 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2857 } 2858 2859 #if INCLUDE_CDS 2860 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2861 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2862 } 2863 #endif 2864 2865 Handle java_lang_reflect_Constructor::create(TRAPS) { 2866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2867 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2868 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2869 InstanceKlass* ik = InstanceKlass::cast(k); 2870 // Ensure it is initialized 2871 ik->initialize(CHECK_NH); 2872 return ik->allocate_instance_handle(THREAD); 2873 } 2874 2875 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2877 return reflect->obj_field(clazz_offset); 2878 } 2879 2880 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2882 reflect->obj_field_put(clazz_offset, value); 2883 } 2884 2885 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2887 return constructor->obj_field(parameterTypes_offset); 2888 } 2889 2890 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2892 constructor->obj_field_put(parameterTypes_offset, value); 2893 } 2894 2895 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2897 constructor->obj_field_put(exceptionTypes_offset, value); 2898 } 2899 2900 int java_lang_reflect_Constructor::slot(oop reflect) { 2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2902 return reflect->int_field(slot_offset); 2903 } 2904 2905 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2907 reflect->int_field_put(slot_offset, value); 2908 } 2909 2910 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2912 constructor->int_field_put(modifiers_offset, value); 2913 } 2914 2915 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2917 constructor->obj_field_put(signature_offset, value); 2918 } 2919 2920 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2922 constructor->obj_field_put(annotations_offset, value); 2923 } 2924 2925 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2927 method->obj_field_put(parameter_annotations_offset, value); 2928 } 2929 2930 #define FIELD_FIELDS_DO(macro) \ 2931 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2932 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2933 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2934 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2935 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2936 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2937 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2938 2939 void java_lang_reflect_Field::compute_offsets() { 2940 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2941 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2942 } 2943 2944 #if INCLUDE_CDS 2945 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2946 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2947 } 2948 #endif 2949 2950 Handle java_lang_reflect_Field::create(TRAPS) { 2951 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2952 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2953 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2954 InstanceKlass* ik = InstanceKlass::cast(k); 2955 // Ensure it is initialized 2956 ik->initialize(CHECK_NH); 2957 return ik->allocate_instance_handle(THREAD); 2958 } 2959 2960 oop java_lang_reflect_Field::clazz(oop reflect) { 2961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2962 return reflect->obj_field(clazz_offset); 2963 } 2964 2965 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2967 reflect->obj_field_put(clazz_offset, value); 2968 } 2969 2970 oop java_lang_reflect_Field::name(oop field) { 2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2972 return field->obj_field(name_offset); 2973 } 2974 2975 void java_lang_reflect_Field::set_name(oop field, oop value) { 2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2977 field->obj_field_put(name_offset, value); 2978 } 2979 2980 oop java_lang_reflect_Field::type(oop field) { 2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2982 return field->obj_field(type_offset); 2983 } 2984 2985 void java_lang_reflect_Field::set_type(oop field, oop value) { 2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2987 field->obj_field_put(type_offset, value); 2988 } 2989 2990 int java_lang_reflect_Field::slot(oop reflect) { 2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2992 return reflect->int_field(slot_offset); 2993 } 2994 2995 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2997 reflect->int_field_put(slot_offset, value); 2998 } 2999 3000 int java_lang_reflect_Field::modifiers(oop field) { 3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3002 return field->int_field(modifiers_offset); 3003 } 3004 3005 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3007 field->int_field_put(modifiers_offset, value); 3008 } 3009 3010 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3012 field->obj_field_put(signature_offset, value); 3013 } 3014 3015 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3017 field->obj_field_put(annotations_offset, value); 3018 } 3019 3020 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3021 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3022 3023 void reflect_ConstantPool::compute_offsets() { 3024 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3025 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3026 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3027 } 3028 3029 #if INCLUDE_CDS 3030 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3031 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3032 } 3033 #endif 3034 3035 #define PARAMETER_FIELDS_DO(macro) \ 3036 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3037 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3038 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3039 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3040 3041 void java_lang_reflect_Parameter::compute_offsets() { 3042 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3043 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3044 } 3045 3046 #if INCLUDE_CDS 3047 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3048 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3049 } 3050 #endif 3051 3052 Handle java_lang_reflect_Parameter::create(TRAPS) { 3053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3054 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3055 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3056 InstanceKlass* ik = InstanceKlass::cast(k); 3057 // Ensure it is initialized 3058 ik->initialize(CHECK_NH); 3059 return ik->allocate_instance_handle(THREAD); 3060 } 3061 3062 oop java_lang_reflect_Parameter::name(oop param) { 3063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3064 return param->obj_field(name_offset); 3065 } 3066 3067 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3069 param->obj_field_put(name_offset, value); 3070 } 3071 3072 int java_lang_reflect_Parameter::modifiers(oop param) { 3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3074 return param->int_field(modifiers_offset); 3075 } 3076 3077 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3079 param->int_field_put(modifiers_offset, value); 3080 } 3081 3082 int java_lang_reflect_Parameter::index(oop param) { 3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3084 return param->int_field(index_offset); 3085 } 3086 3087 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3089 param->int_field_put(index_offset, value); 3090 } 3091 3092 oop java_lang_reflect_Parameter::executable(oop param) { 3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3094 return param->obj_field(executable_offset); 3095 } 3096 3097 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3099 param->obj_field_put(executable_offset, value); 3100 } 3101 3102 3103 int java_lang_Module::loader_offset; 3104 int java_lang_Module::name_offset; 3105 int java_lang_Module::_module_entry_offset = -1; 3106 3107 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3109 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3110 vmSymbols::java_lang_module_init_signature(), 3111 loader, module_name, CHECK_NH); 3112 } 3113 3114 #define MODULE_FIELDS_DO(macro) \ 3115 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3116 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3117 3118 void java_lang_Module::compute_offsets() { 3119 InstanceKlass* k = SystemDictionary::Module_klass(); 3120 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3121 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3122 } 3123 3124 #if INCLUDE_CDS 3125 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3126 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3127 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3128 } 3129 #endif 3130 3131 oop java_lang_Module::loader(oop module) { 3132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3133 return module->obj_field(loader_offset); 3134 } 3135 3136 void java_lang_Module::set_loader(oop module, oop value) { 3137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3138 module->obj_field_put(loader_offset, value); 3139 } 3140 3141 oop java_lang_Module::name(oop module) { 3142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3143 return module->obj_field(name_offset); 3144 } 3145 3146 void java_lang_Module::set_name(oop module, oop value) { 3147 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3148 module->obj_field_put(name_offset, value); 3149 } 3150 3151 ModuleEntry* java_lang_Module::module_entry(oop module) { 3152 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3153 assert(module != NULL, "module can't be null"); 3154 assert(oopDesc::is_oop(module), "module must be oop"); 3155 3156 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3157 if (module_entry == NULL) { 3158 // If the inject field containing the ModuleEntry* is null then return the 3159 // class loader's unnamed module. 3160 oop loader = java_lang_Module::loader(module); 3161 Handle h_loader = Handle(Thread::current(), loader); 3162 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3163 return loader_cld->unnamed_module(); 3164 } 3165 return module_entry; 3166 } 3167 3168 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3169 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3170 assert(module != NULL, "module can't be null"); 3171 assert(oopDesc::is_oop(module), "module must be oop"); 3172 module->address_field_put(_module_entry_offset, (address)module_entry); 3173 } 3174 3175 Handle reflect_ConstantPool::create(TRAPS) { 3176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3177 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3178 // Ensure it is initialized 3179 k->initialize(CHECK_NH); 3180 return k->allocate_instance_handle(THREAD); 3181 } 3182 3183 3184 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3186 oop mirror = value->pool_holder()->java_mirror(); 3187 // Save the mirror to get back the constant pool. 3188 reflect->obj_field_put(_oop_offset, mirror); 3189 } 3190 3191 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3193 3194 oop mirror = reflect->obj_field(_oop_offset); 3195 Klass* k = java_lang_Class::as_Klass(mirror); 3196 assert(k->is_instance_klass(), "Must be"); 3197 3198 // Get the constant pool back from the klass. Since class redefinition 3199 // merges the new constant pool into the old, this is essentially the 3200 // same constant pool as the original. If constant pool merging is 3201 // no longer done in the future, this will have to change to save 3202 // the original. 3203 return InstanceKlass::cast(k)->constants(); 3204 } 3205 3206 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3207 macro(_base_offset, k, "base", object_signature, false) 3208 3209 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3210 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3211 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3212 } 3213 3214 #if INCLUDE_CDS 3215 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3216 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3217 } 3218 #endif 3219 3220 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3221 Klass* k = SystemDictionary::box_klass(type); 3222 if (k == NULL) return NULL; 3223 InstanceKlass* ik = InstanceKlass::cast(k); 3224 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3225 return ik->allocate_instance(THREAD); 3226 } 3227 3228 3229 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3230 oop box = initialize_and_allocate(type, CHECK_0); 3231 if (box == NULL) return NULL; 3232 switch (type) { 3233 case T_BOOLEAN: 3234 box->bool_field_put(value_offset, value->z); 3235 break; 3236 case T_CHAR: 3237 box->char_field_put(value_offset, value->c); 3238 break; 3239 case T_FLOAT: 3240 box->float_field_put(value_offset, value->f); 3241 break; 3242 case T_DOUBLE: 3243 box->double_field_put(long_value_offset, value->d); 3244 break; 3245 case T_BYTE: 3246 box->byte_field_put(value_offset, value->b); 3247 break; 3248 case T_SHORT: 3249 box->short_field_put(value_offset, value->s); 3250 break; 3251 case T_INT: 3252 box->int_field_put(value_offset, value->i); 3253 break; 3254 case T_LONG: 3255 box->long_field_put(long_value_offset, value->j); 3256 break; 3257 default: 3258 return NULL; 3259 } 3260 return box; 3261 } 3262 3263 3264 BasicType java_lang_boxing_object::basic_type(oop box) { 3265 if (box == NULL) return T_ILLEGAL; 3266 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3267 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3268 return T_ILLEGAL; 3269 return type; 3270 } 3271 3272 3273 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3274 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3275 switch (type) { 3276 case T_BOOLEAN: 3277 value->z = box->bool_field(value_offset); 3278 break; 3279 case T_CHAR: 3280 value->c = box->char_field(value_offset); 3281 break; 3282 case T_FLOAT: 3283 value->f = box->float_field(value_offset); 3284 break; 3285 case T_DOUBLE: 3286 value->d = box->double_field(long_value_offset); 3287 break; 3288 case T_BYTE: 3289 value->b = box->byte_field(value_offset); 3290 break; 3291 case T_SHORT: 3292 value->s = box->short_field(value_offset); 3293 break; 3294 case T_INT: 3295 value->i = box->int_field(value_offset); 3296 break; 3297 case T_LONG: 3298 value->j = box->long_field(long_value_offset); 3299 break; 3300 default: 3301 return T_ILLEGAL; 3302 } // end switch 3303 return type; 3304 } 3305 3306 3307 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3308 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3309 switch (type) { 3310 case T_BOOLEAN: 3311 box->bool_field_put(value_offset, value->z); 3312 break; 3313 case T_CHAR: 3314 box->char_field_put(value_offset, value->c); 3315 break; 3316 case T_FLOAT: 3317 box->float_field_put(value_offset, value->f); 3318 break; 3319 case T_DOUBLE: 3320 box->double_field_put(long_value_offset, value->d); 3321 break; 3322 case T_BYTE: 3323 box->byte_field_put(value_offset, value->b); 3324 break; 3325 case T_SHORT: 3326 box->short_field_put(value_offset, value->s); 3327 break; 3328 case T_INT: 3329 box->int_field_put(value_offset, value->i); 3330 break; 3331 case T_LONG: 3332 box->long_field_put(long_value_offset, value->j); 3333 break; 3334 default: 3335 return T_ILLEGAL; 3336 } // end switch 3337 return type; 3338 } 3339 3340 3341 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3342 switch (type) { 3343 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3344 case T_CHAR: st->print("%d", value->c); break; 3345 case T_BYTE: st->print("%d", value->b); break; 3346 case T_SHORT: st->print("%d", value->s); break; 3347 case T_INT: st->print("%d", value->i); break; 3348 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3349 case T_FLOAT: st->print("%f", value->f); break; 3350 case T_DOUBLE: st->print("%lf", value->d); break; 3351 default: st->print("type %d?", type); break; 3352 } 3353 } 3354 3355 // Support for java_lang_ref_Reference 3356 3357 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3358 assert(obj != NULL, "sanity"); 3359 if (offset != java_lang_ref_Reference::referent_offset) { 3360 return false; 3361 } 3362 3363 Klass* k = obj->klass(); 3364 if (!k->is_instance_klass()) { 3365 return false; 3366 } 3367 3368 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3369 bool is_reference = ik->reference_type() != REF_NONE; 3370 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3371 return is_reference; 3372 } 3373 3374 // Support for java_lang_ref_SoftReference 3375 // 3376 3377 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3378 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3379 macro(static_clock_offset, k, "clock", long_signature, true) 3380 3381 void java_lang_ref_SoftReference::compute_offsets() { 3382 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3383 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3384 } 3385 3386 #if INCLUDE_CDS 3387 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3388 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3389 } 3390 #endif 3391 3392 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3393 return ref->long_field(timestamp_offset); 3394 } 3395 3396 jlong java_lang_ref_SoftReference::clock() { 3397 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3398 oop base = ik->static_field_base_raw(); 3399 return base->long_field(static_clock_offset); 3400 } 3401 3402 void java_lang_ref_SoftReference::set_clock(jlong value) { 3403 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3404 oop base = ik->static_field_base_raw(); 3405 base->long_field_put(static_clock_offset, value); 3406 } 3407 3408 // Support for java_lang_invoke_DirectMethodHandle 3409 3410 int java_lang_invoke_DirectMethodHandle::_member_offset; 3411 3412 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3413 oop member_name = NULL; 3414 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3415 "a DirectMethodHandle oop is expected"); 3416 return dmh->obj_field(member_offset_in_bytes()); 3417 } 3418 3419 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3420 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3421 3422 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3423 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3424 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3425 } 3426 3427 #if INCLUDE_CDS 3428 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3429 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3430 } 3431 #endif 3432 3433 // Support for java_lang_invoke_MethodHandle 3434 3435 int java_lang_invoke_MethodHandle::_type_offset; 3436 int java_lang_invoke_MethodHandle::_form_offset; 3437 3438 int java_lang_invoke_MemberName::_clazz_offset; 3439 int java_lang_invoke_MemberName::_name_offset; 3440 int java_lang_invoke_MemberName::_type_offset; 3441 int java_lang_invoke_MemberName::_flags_offset; 3442 int java_lang_invoke_MemberName::_method_offset; 3443 int java_lang_invoke_MemberName::_vmindex_offset; 3444 3445 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3446 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3447 3448 int java_lang_invoke_LambdaForm::_vmentry_offset; 3449 3450 #define METHODHANDLE_FIELDS_DO(macro) \ 3451 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3452 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3453 3454 void java_lang_invoke_MethodHandle::compute_offsets() { 3455 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3456 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3457 } 3458 3459 #if INCLUDE_CDS 3460 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3461 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3462 } 3463 #endif 3464 3465 #define MEMBERNAME_FIELDS_DO(macro) \ 3466 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3467 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3468 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3469 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3470 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3471 3472 void java_lang_invoke_MemberName::compute_offsets() { 3473 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3474 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3475 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3476 } 3477 3478 #if INCLUDE_CDS 3479 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3480 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3481 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3482 } 3483 #endif 3484 3485 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3486 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3487 assert(k != NULL, "jdk mismatch"); 3488 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3489 } 3490 3491 #if INCLUDE_CDS 3492 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3493 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3494 } 3495 #endif 3496 3497 #define LAMBDAFORM_FIELDS_DO(macro) \ 3498 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3499 3500 void java_lang_invoke_LambdaForm::compute_offsets() { 3501 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3502 assert (k != NULL, "jdk mismatch"); 3503 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3504 } 3505 3506 #if INCLUDE_CDS 3507 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3508 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3509 } 3510 #endif 3511 3512 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3513 return obj != NULL && is_subclass(obj->klass()); 3514 } 3515 3516 3517 oop java_lang_invoke_MethodHandle::type(oop mh) { 3518 return mh->obj_field(_type_offset); 3519 } 3520 3521 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3522 mh->obj_field_put(_type_offset, mtype); 3523 } 3524 3525 oop java_lang_invoke_MethodHandle::form(oop mh) { 3526 assert(_form_offset != 0, ""); 3527 return mh->obj_field(_form_offset); 3528 } 3529 3530 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3531 assert(_form_offset != 0, ""); 3532 mh->obj_field_put(_form_offset, lform); 3533 } 3534 3535 /// MemberName accessors 3536 3537 oop java_lang_invoke_MemberName::clazz(oop mname) { 3538 assert(is_instance(mname), "wrong type"); 3539 return mname->obj_field(_clazz_offset); 3540 } 3541 3542 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3543 assert(is_instance(mname), "wrong type"); 3544 mname->obj_field_put(_clazz_offset, clazz); 3545 } 3546 3547 oop java_lang_invoke_MemberName::name(oop mname) { 3548 assert(is_instance(mname), "wrong type"); 3549 return mname->obj_field(_name_offset); 3550 } 3551 3552 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3553 assert(is_instance(mname), "wrong type"); 3554 mname->obj_field_put(_name_offset, name); 3555 } 3556 3557 oop java_lang_invoke_MemberName::type(oop mname) { 3558 assert(is_instance(mname), "wrong type"); 3559 return mname->obj_field(_type_offset); 3560 } 3561 3562 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3563 assert(is_instance(mname), "wrong type"); 3564 mname->obj_field_put(_type_offset, type); 3565 } 3566 3567 int java_lang_invoke_MemberName::flags(oop mname) { 3568 assert(is_instance(mname), "wrong type"); 3569 return mname->int_field(_flags_offset); 3570 } 3571 3572 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3573 assert(is_instance(mname), "wrong type"); 3574 mname->int_field_put(_flags_offset, flags); 3575 } 3576 3577 3578 // Return vmtarget from ResolvedMethodName method field through indirection 3579 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3580 assert(is_instance(mname), "wrong type"); 3581 oop method = mname->obj_field(_method_offset); 3582 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3583 } 3584 3585 bool java_lang_invoke_MemberName::is_method(oop mname) { 3586 assert(is_instance(mname), "must be MemberName"); 3587 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3588 } 3589 3590 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3591 assert(is_instance(mname), "wrong type"); 3592 mname->obj_field_put(_method_offset, resolved_method); 3593 } 3594 3595 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3596 assert(is_instance(mname), "wrong type"); 3597 return (intptr_t) mname->address_field(_vmindex_offset); 3598 } 3599 3600 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3601 assert(is_instance(mname), "wrong type"); 3602 mname->address_field_put(_vmindex_offset, (address) index); 3603 } 3604 3605 3606 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3607 assert(is_instance(resolved_method), "wrong type"); 3608 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3609 assert(m->is_method(), "must be"); 3610 return m; 3611 } 3612 3613 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3614 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3615 assert(is_instance(resolved_method), "wrong type"); 3616 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3617 } 3618 3619 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3620 assert(is_instance(resolved_method), "wrong type"); 3621 resolved_method->obj_field_put(_vmholder_offset, holder); 3622 } 3623 3624 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3625 const Method* method = m(); 3626 3627 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3628 oop resolved_method = ResolvedMethodTable::find_method(method); 3629 if (resolved_method != NULL) { 3630 return resolved_method; 3631 } 3632 3633 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3634 if (!k->is_initialized()) { 3635 k->initialize(CHECK_NULL); 3636 } 3637 3638 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3639 3640 NoSafepointVerifier nsv; 3641 3642 if (method->is_old()) { 3643 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3644 method->get_new_method(); 3645 } 3646 3647 InstanceKlass* holder = method->method_holder(); 3648 3649 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3650 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3651 // distinct loaders) to ensure the metadata is kept alive. 3652 // This mirror may be different than the one in clazz field. 3653 set_vmholder(new_resolved_method, holder->java_mirror()); 3654 3655 // Set flag in class to indicate this InstanceKlass has entries in the table 3656 // to avoid walking table during redefinition if none of the redefined classes 3657 // have any membernames in the table. 3658 holder->set_has_resolved_methods(); 3659 3660 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3661 } 3662 3663 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3664 assert(is_instance(lform), "wrong type"); 3665 return lform->obj_field(_vmentry_offset); 3666 } 3667 3668 3669 // Support for java_lang_invoke_MethodType 3670 3671 int java_lang_invoke_MethodType::_rtype_offset; 3672 int java_lang_invoke_MethodType::_ptypes_offset; 3673 3674 #define METHODTYPE_FIELDS_DO(macro) \ 3675 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3676 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3677 3678 void java_lang_invoke_MethodType::compute_offsets() { 3679 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3680 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3681 } 3682 3683 #if INCLUDE_CDS 3684 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3685 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3686 } 3687 #endif 3688 3689 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3690 st->print("("); 3691 objArrayOop pts = ptypes(mt); 3692 for (int i = 0, limit = pts->length(); i < limit; i++) { 3693 java_lang_Class::print_signature(pts->obj_at(i), st); 3694 } 3695 st->print(")"); 3696 java_lang_Class::print_signature(rtype(mt), st); 3697 } 3698 3699 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 3700 ResourceMark rm; 3701 stringStream buffer(128); 3702 print_signature(mt, &buffer); 3703 const char* sigstr = buffer.base(); 3704 int siglen = (int) buffer.size(); 3705 Symbol *name; 3706 if (!intern_if_not_found) { 3707 name = SymbolTable::probe(sigstr, siglen); 3708 } else { 3709 name = SymbolTable::new_symbol(sigstr, siglen); 3710 } 3711 return name; 3712 } 3713 3714 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3715 if (oopDesc::equals(mt1, mt2)) 3716 return true; 3717 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3718 return false; 3719 if (ptype_count(mt1) != ptype_count(mt2)) 3720 return false; 3721 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3722 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3723 return false; 3724 } 3725 return true; 3726 } 3727 3728 oop java_lang_invoke_MethodType::rtype(oop mt) { 3729 assert(is_instance(mt), "must be a MethodType"); 3730 return mt->obj_field(_rtype_offset); 3731 } 3732 3733 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3734 assert(is_instance(mt), "must be a MethodType"); 3735 return (objArrayOop) mt->obj_field(_ptypes_offset); 3736 } 3737 3738 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3739 return ptypes(mt)->obj_at(idx); 3740 } 3741 3742 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3743 return ptypes(mt)->length(); 3744 } 3745 3746 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3747 objArrayOop pts = ptypes(mt); 3748 int count = pts->length(); 3749 int slots = 0; 3750 for (int i = 0; i < count; i++) { 3751 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3752 slots += type2size[bt]; 3753 } 3754 return slots; 3755 } 3756 3757 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3758 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3759 return type2size[bt]; 3760 } 3761 3762 3763 // Support for java_lang_invoke_CallSite 3764 3765 int java_lang_invoke_CallSite::_target_offset; 3766 int java_lang_invoke_CallSite::_context_offset; 3767 3768 #define CALLSITE_FIELDS_DO(macro) \ 3769 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3770 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3771 3772 void java_lang_invoke_CallSite::compute_offsets() { 3773 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3774 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3775 } 3776 3777 #if INCLUDE_CDS 3778 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3779 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3780 } 3781 #endif 3782 3783 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3784 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3785 3786 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3787 return dep_oop; 3788 } 3789 3790 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3791 3792 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3793 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3794 3795 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3796 InstanceKlass* k = SystemDictionary::Context_klass(); 3797 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3798 } 3799 3800 #if INCLUDE_CDS 3801 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3802 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3803 } 3804 #endif 3805 3806 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3807 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3808 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3809 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3810 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3811 return dep_ctx; 3812 } 3813 3814 // Support for java_security_AccessControlContext 3815 3816 int java_security_AccessControlContext::_context_offset = 0; 3817 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3818 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3819 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3820 3821 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3822 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3823 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3824 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3825 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3826 3827 void java_security_AccessControlContext::compute_offsets() { 3828 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3829 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3830 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3831 } 3832 3833 #if INCLUDE_CDS 3834 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3835 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3836 } 3837 #endif 3838 3839 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3840 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3841 // Ensure klass is initialized 3842 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3843 // Allocate result 3844 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3845 // Fill in values 3846 result->obj_field_put(_context_offset, context()); 3847 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3848 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3849 // whitelist AccessControlContexts created by the JVM if present 3850 if (_isAuthorized_offset != -1) { 3851 result->bool_field_put(_isAuthorized_offset, true); 3852 } 3853 return result; 3854 } 3855 3856 3857 // Support for java_lang_ClassLoader 3858 3859 bool java_lang_ClassLoader::offsets_computed = false; 3860 int java_lang_ClassLoader::_loader_data_offset = -1; 3861 int java_lang_ClassLoader::parallelCapable_offset = -1; 3862 int java_lang_ClassLoader::name_offset = -1; 3863 int java_lang_ClassLoader::nameAndId_offset = -1; 3864 int java_lang_ClassLoader::unnamedModule_offset = -1; 3865 3866 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3867 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3868 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3869 } 3870 3871 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3872 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3873 return RawAccess<>::load_at(loader, _loader_data_offset); 3874 } 3875 3876 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3877 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3878 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3879 } 3880 3881 #define CLASSLOADER_FIELDS_DO(macro) \ 3882 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3883 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3884 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3885 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3886 macro(parent_offset, k1, "parent", classloader_signature, false) 3887 3888 void java_lang_ClassLoader::compute_offsets() { 3889 assert(!offsets_computed, "offsets should be initialized only once"); 3890 offsets_computed = true; 3891 3892 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3893 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3894 3895 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3896 } 3897 3898 #if INCLUDE_CDS 3899 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3900 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3901 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3902 } 3903 #endif 3904 3905 oop java_lang_ClassLoader::parent(oop loader) { 3906 assert(is_instance(loader), "loader must be oop"); 3907 return loader->obj_field(parent_offset); 3908 } 3909 3910 // Returns the name field of this class loader. If the name field has not 3911 // been set, null will be returned. 3912 oop java_lang_ClassLoader::name(oop loader) { 3913 assert(is_instance(loader), "loader must be oop"); 3914 return loader->obj_field(name_offset); 3915 } 3916 3917 // Returns the nameAndId field of this class loader. The format is 3918 // as follows: 3919 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3920 // If the defining loader has no name then <qualified-class-name> @<id> 3921 // If built-in loader, then omit '@<id>' as there is only one instance. 3922 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3923 oop java_lang_ClassLoader::nameAndId(oop loader) { 3924 assert(is_instance(loader), "loader must be oop"); 3925 return loader->obj_field(nameAndId_offset); 3926 } 3927 3928 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3929 assert(is_instance(loader), "loader must be oop"); 3930 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3931 oop acl = loader; 3932 debug_only(jint loop_count = 0); 3933 // This loop taken verbatim from ClassLoader.java: 3934 do { 3935 acl = parent(acl); 3936 if (oopDesc::equals(cl, acl)) { 3937 return true; 3938 } 3939 assert(++loop_count > 0, "loop_count overflow"); 3940 } while (acl != NULL); 3941 return false; 3942 } 3943 3944 bool java_lang_ClassLoader::is_instance(oop obj) { 3945 return obj != NULL && is_subclass(obj->klass()); 3946 } 3947 3948 3949 // For class loader classes, parallelCapable defined 3950 // based on non-null field 3951 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3952 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3953 if (parallelCapable_offset == -1) { 3954 // Default for backward compatibility is false 3955 return false; 3956 } 3957 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3958 } 3959 3960 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3961 // Fix for 4474172; see evaluation for more details 3962 loader = non_reflection_class_loader(loader); 3963 3964 oop cl = SystemDictionary::java_system_loader(); 3965 while(cl != NULL) { 3966 if (oopDesc::equals(cl, loader)) return true; 3967 cl = parent(cl); 3968 } 3969 return false; 3970 } 3971 3972 // Return true if this is one of the class loaders associated with 3973 // the generated bytecodes for reflection. 3974 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3975 if (loader != NULL) { 3976 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3977 // This might be null in non-1.4 JDKs 3978 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3979 } 3980 return false; 3981 } 3982 3983 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3984 // See whether this is one of the class loaders associated with 3985 // the generated bytecodes for reflection, and if so, "magically" 3986 // delegate to its parent to prevent class loading from occurring 3987 // in places where applications using reflection didn't expect it. 3988 if (is_reflection_class_loader(loader)) { 3989 return parent(loader); 3990 } 3991 return loader; 3992 } 3993 3994 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3995 assert(is_instance(loader), "loader must be oop"); 3996 return loader->obj_field(unnamedModule_offset); 3997 } 3998 3999 // Support for java_lang_System 4000 // 4001 #define SYSTEM_FIELDS_DO(macro) \ 4002 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4003 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4004 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4005 macro(static_security_offset, k, "security", security_manager_signature, true) 4006 4007 void java_lang_System::compute_offsets() { 4008 InstanceKlass* k = SystemDictionary::System_klass(); 4009 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4010 } 4011 4012 #if INCLUDE_CDS 4013 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4014 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4015 } 4016 #endif 4017 4018 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4019 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4020 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4021 4022 // Support for jdk_internal_misc_UnsafeConstants 4023 // 4024 class UnsafeConstantsFixup : public FieldClosure { 4025 private: 4026 int _address_size; 4027 int _page_size; 4028 bool _big_endian; 4029 bool _use_unaligned_access; 4030 int _data_cache_line_flush_size; 4031 public: 4032 UnsafeConstantsFixup() { 4033 // round up values for all static final fields 4034 _address_size = sizeof(void*); 4035 _page_size = os::vm_page_size(); 4036 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4037 _use_unaligned_access = UseUnalignedAccesses; 4038 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4039 } 4040 4041 void do_field(fieldDescriptor* fd) { 4042 oop mirror = fd->field_holder()->java_mirror(); 4043 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4044 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4045 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4046 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4047 if (fd->name() == vmSymbols::address_size_name()) { 4048 mirror->int_field_put(fd->offset(), _address_size); 4049 } else if (fd->name() == vmSymbols::page_size_name()) { 4050 mirror->int_field_put(fd->offset(), _page_size); 4051 } else if (fd->name() == vmSymbols::big_endian_name()) { 4052 mirror->bool_field_put(fd->offset(), _big_endian); 4053 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4054 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4055 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4056 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4057 } else { 4058 assert(false, "unexpected UnsafeConstants field"); 4059 } 4060 } 4061 }; 4062 4063 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4064 UnsafeConstantsFixup fixup; 4065 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4066 } 4067 4068 int java_lang_Class::_klass_offset; 4069 int java_lang_Class::_array_klass_offset; 4070 int java_lang_Class::_oop_size_offset; 4071 int java_lang_Class::_static_oop_field_count_offset; 4072 int java_lang_Class::_class_loader_offset; 4073 int java_lang_Class::_module_offset; 4074 int java_lang_Class::_protection_domain_offset; 4075 int java_lang_Class::_component_mirror_offset; 4076 int java_lang_Class::_init_lock_offset; 4077 int java_lang_Class::_signers_offset; 4078 int java_lang_Class::_name_offset; 4079 int java_lang_Class::_source_file_offset; 4080 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4081 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4082 int java_lang_Throwable::backtrace_offset; 4083 int java_lang_Throwable::detailMessage_offset; 4084 int java_lang_Throwable::stackTrace_offset; 4085 int java_lang_Throwable::depth_offset; 4086 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4087 int java_lang_reflect_AccessibleObject::override_offset; 4088 int java_lang_reflect_Method::clazz_offset; 4089 int java_lang_reflect_Method::name_offset; 4090 int java_lang_reflect_Method::returnType_offset; 4091 int java_lang_reflect_Method::parameterTypes_offset; 4092 int java_lang_reflect_Method::exceptionTypes_offset; 4093 int java_lang_reflect_Method::slot_offset; 4094 int java_lang_reflect_Method::modifiers_offset; 4095 int java_lang_reflect_Method::signature_offset; 4096 int java_lang_reflect_Method::annotations_offset; 4097 int java_lang_reflect_Method::parameter_annotations_offset; 4098 int java_lang_reflect_Method::annotation_default_offset; 4099 int java_lang_reflect_Constructor::clazz_offset; 4100 int java_lang_reflect_Constructor::parameterTypes_offset; 4101 int java_lang_reflect_Constructor::exceptionTypes_offset; 4102 int java_lang_reflect_Constructor::slot_offset; 4103 int java_lang_reflect_Constructor::modifiers_offset; 4104 int java_lang_reflect_Constructor::signature_offset; 4105 int java_lang_reflect_Constructor::annotations_offset; 4106 int java_lang_reflect_Constructor::parameter_annotations_offset; 4107 int java_lang_reflect_Field::clazz_offset; 4108 int java_lang_reflect_Field::name_offset; 4109 int java_lang_reflect_Field::type_offset; 4110 int java_lang_reflect_Field::slot_offset; 4111 int java_lang_reflect_Field::modifiers_offset; 4112 int java_lang_reflect_Field::signature_offset; 4113 int java_lang_reflect_Field::annotations_offset; 4114 int java_lang_reflect_Parameter::name_offset; 4115 int java_lang_reflect_Parameter::modifiers_offset; 4116 int java_lang_reflect_Parameter::index_offset; 4117 int java_lang_reflect_Parameter::executable_offset; 4118 int java_lang_boxing_object::value_offset; 4119 int java_lang_boxing_object::long_value_offset; 4120 int java_lang_ref_Reference::referent_offset; 4121 int java_lang_ref_Reference::queue_offset; 4122 int java_lang_ref_Reference::next_offset; 4123 int java_lang_ref_Reference::discovered_offset; 4124 int java_lang_ref_SoftReference::timestamp_offset; 4125 int java_lang_ref_SoftReference::static_clock_offset; 4126 int java_lang_ClassLoader::parent_offset; 4127 int java_lang_System::static_in_offset; 4128 int java_lang_System::static_out_offset; 4129 int java_lang_System::static_err_offset; 4130 int java_lang_System::static_security_offset; 4131 int java_lang_StackTraceElement::methodName_offset; 4132 int java_lang_StackTraceElement::fileName_offset; 4133 int java_lang_StackTraceElement::lineNumber_offset; 4134 int java_lang_StackTraceElement::moduleName_offset; 4135 int java_lang_StackTraceElement::moduleVersion_offset; 4136 int java_lang_StackTraceElement::classLoaderName_offset; 4137 int java_lang_StackTraceElement::declaringClass_offset; 4138 int java_lang_StackTraceElement::declaringClassObject_offset; 4139 int java_lang_StackFrameInfo::_memberName_offset; 4140 int java_lang_StackFrameInfo::_bci_offset; 4141 int java_lang_StackFrameInfo::_version_offset; 4142 int java_lang_LiveStackFrameInfo::_monitors_offset; 4143 int java_lang_LiveStackFrameInfo::_locals_offset; 4144 int java_lang_LiveStackFrameInfo::_operands_offset; 4145 int java_lang_LiveStackFrameInfo::_mode_offset; 4146 int java_lang_AssertionStatusDirectives::classes_offset; 4147 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4148 int java_lang_AssertionStatusDirectives::packages_offset; 4149 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4150 int java_lang_AssertionStatusDirectives::deflt_offset; 4151 int java_nio_Buffer::_limit_offset; 4152 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4153 int reflect_ConstantPool::_oop_offset; 4154 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4155 int java_lang_Integer_IntegerCache::_static_cache_offset; 4156 int java_lang_Long_LongCache::_static_cache_offset; 4157 int java_lang_Character_CharacterCache::_static_cache_offset; 4158 int java_lang_Short_ShortCache::_static_cache_offset; 4159 int java_lang_Byte_ByteCache::_static_cache_offset; 4160 int java_lang_Boolean::_static_TRUE_offset; 4161 int java_lang_Boolean::_static_FALSE_offset; 4162 4163 4164 4165 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4166 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4167 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4168 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4169 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4170 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4171 macro(methodName_offset, k, "methodName", string_signature, false); \ 4172 macro(fileName_offset, k, "fileName", string_signature, false); \ 4173 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4174 4175 // Support for java_lang_StackTraceElement 4176 void java_lang_StackTraceElement::compute_offsets() { 4177 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4178 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4179 } 4180 4181 #if INCLUDE_CDS 4182 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4183 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4184 } 4185 #endif 4186 4187 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4188 element->obj_field_put(fileName_offset, value); 4189 } 4190 4191 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4192 element->obj_field_put(declaringClass_offset, value); 4193 } 4194 4195 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4196 element->obj_field_put(methodName_offset, value); 4197 } 4198 4199 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4200 element->int_field_put(lineNumber_offset, value); 4201 } 4202 4203 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4204 element->obj_field_put(moduleName_offset, value); 4205 } 4206 4207 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4208 element->obj_field_put(moduleVersion_offset, value); 4209 } 4210 4211 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4212 element->obj_field_put(classLoaderName_offset, value); 4213 } 4214 4215 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4216 element->obj_field_put(declaringClassObject_offset, value); 4217 } 4218 4219 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4220 element->short_field_put(_version_offset, value); 4221 } 4222 4223 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4224 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 4225 element->int_field_put(_bci_offset, value); 4226 } 4227 4228 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4229 element->obj_field_put(_monitors_offset, value); 4230 } 4231 4232 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4233 element->obj_field_put(_locals_offset, value); 4234 } 4235 4236 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4237 element->obj_field_put(_operands_offset, value); 4238 } 4239 4240 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4241 element->int_field_put(_mode_offset, value); 4242 } 4243 4244 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4245 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4246 macro(classes_offset, k, "classes", string_array_signature, false); \ 4247 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4248 macro(packages_offset, k, "packages", string_array_signature, false); \ 4249 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4250 macro(deflt_offset, k, "deflt", bool_signature, false) 4251 4252 void java_lang_AssertionStatusDirectives::compute_offsets() { 4253 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4254 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4255 } 4256 4257 #if INCLUDE_CDS 4258 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4259 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4260 } 4261 #endif 4262 4263 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4264 o->obj_field_put(classes_offset, val); 4265 } 4266 4267 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4268 o->obj_field_put(classEnabled_offset, val); 4269 } 4270 4271 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4272 o->obj_field_put(packages_offset, val); 4273 } 4274 4275 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4276 o->obj_field_put(packageEnabled_offset, val); 4277 } 4278 4279 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4280 o->bool_field_put(deflt_offset, val); 4281 } 4282 4283 4284 // Support for intrinsification of java.nio.Buffer.checkIndex 4285 int java_nio_Buffer::limit_offset() { 4286 return _limit_offset; 4287 } 4288 4289 #define BUFFER_FIELDS_DO(macro) \ 4290 macro(_limit_offset, k, "limit", int_signature, false) 4291 4292 void java_nio_Buffer::compute_offsets() { 4293 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4294 assert(k != NULL, "must be loaded in 1.4+"); 4295 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4296 } 4297 4298 #if INCLUDE_CDS 4299 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4300 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4301 } 4302 #endif 4303 4304 #define AOS_FIELDS_DO(macro) \ 4305 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4306 4307 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4308 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4309 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4310 } 4311 4312 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4313 assert(_owner_offset != 0, "Must be initialized"); 4314 return obj->obj_field(_owner_offset); 4315 } 4316 4317 #if INCLUDE_CDS 4318 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4319 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4320 } 4321 #endif 4322 4323 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4324 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4325 4326 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4327 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4328 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4329 } 4330 4331 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4332 oop base = ik->static_field_base_raw(); 4333 return objArrayOop(base->obj_field(_static_cache_offset)); 4334 } 4335 4336 Symbol* java_lang_Integer_IntegerCache::symbol() { 4337 return vmSymbols::java_lang_Integer_IntegerCache(); 4338 } 4339 4340 #if INCLUDE_CDS 4341 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4342 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4343 } 4344 #endif 4345 #undef INTEGER_CACHE_FIELDS_DO 4346 4347 jint java_lang_Integer::value(oop obj) { 4348 jvalue v; 4349 java_lang_boxing_object::get_value(obj, &v); 4350 return v.i; 4351 } 4352 4353 #define LONG_CACHE_FIELDS_DO(macro) \ 4354 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4355 4356 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4357 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4358 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4359 } 4360 4361 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4362 oop base = ik->static_field_base_raw(); 4363 return objArrayOop(base->obj_field(_static_cache_offset)); 4364 } 4365 4366 Symbol* java_lang_Long_LongCache::symbol() { 4367 return vmSymbols::java_lang_Long_LongCache(); 4368 } 4369 4370 #if INCLUDE_CDS 4371 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4372 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4373 } 4374 #endif 4375 #undef LONG_CACHE_FIELDS_DO 4376 4377 jlong java_lang_Long::value(oop obj) { 4378 jvalue v; 4379 java_lang_boxing_object::get_value(obj, &v); 4380 return v.j; 4381 } 4382 4383 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4384 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4385 4386 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4387 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4388 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4389 } 4390 4391 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4392 oop base = ik->static_field_base_raw(); 4393 return objArrayOop(base->obj_field(_static_cache_offset)); 4394 } 4395 4396 Symbol* java_lang_Character_CharacterCache::symbol() { 4397 return vmSymbols::java_lang_Character_CharacterCache(); 4398 } 4399 4400 #if INCLUDE_CDS 4401 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4402 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4403 } 4404 #endif 4405 #undef CHARACTER_CACHE_FIELDS_DO 4406 4407 jchar java_lang_Character::value(oop obj) { 4408 jvalue v; 4409 java_lang_boxing_object::get_value(obj, &v); 4410 return v.c; 4411 } 4412 4413 #define SHORT_CACHE_FIELDS_DO(macro) \ 4414 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4415 4416 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4417 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4418 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4419 } 4420 4421 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4422 oop base = ik->static_field_base_raw(); 4423 return objArrayOop(base->obj_field(_static_cache_offset)); 4424 } 4425 4426 Symbol* java_lang_Short_ShortCache::symbol() { 4427 return vmSymbols::java_lang_Short_ShortCache(); 4428 } 4429 4430 #if INCLUDE_CDS 4431 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4432 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4433 } 4434 #endif 4435 #undef SHORT_CACHE_FIELDS_DO 4436 4437 jshort java_lang_Short::value(oop obj) { 4438 jvalue v; 4439 java_lang_boxing_object::get_value(obj, &v); 4440 return v.s; 4441 } 4442 4443 #define BYTE_CACHE_FIELDS_DO(macro) \ 4444 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4445 4446 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4447 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4448 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4449 } 4450 4451 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4452 oop base = ik->static_field_base_raw(); 4453 return objArrayOop(base->obj_field(_static_cache_offset)); 4454 } 4455 4456 Symbol* java_lang_Byte_ByteCache::symbol() { 4457 return vmSymbols::java_lang_Byte_ByteCache(); 4458 } 4459 4460 #if INCLUDE_CDS 4461 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4462 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4463 } 4464 #endif 4465 #undef BYTE_CACHE_FIELDS_DO 4466 4467 jbyte java_lang_Byte::value(oop obj) { 4468 jvalue v; 4469 java_lang_boxing_object::get_value(obj, &v); 4470 return v.b; 4471 } 4472 #define BOOLEAN_FIELDS_DO(macro) \ 4473 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4474 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4475 4476 4477 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4478 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4479 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4480 } 4481 4482 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4483 oop base = ik->static_field_base_raw(); 4484 return base->obj_field(_static_TRUE_offset); 4485 } 4486 4487 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4488 oop base = ik->static_field_base_raw(); 4489 return base->obj_field(_static_FALSE_offset); 4490 } 4491 4492 Symbol* java_lang_Boolean::symbol() { 4493 return vmSymbols::java_lang_Boolean(); 4494 } 4495 4496 #if INCLUDE_CDS 4497 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4498 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4499 } 4500 #endif 4501 #undef BOOLEAN_CACHE_FIELDS_DO 4502 4503 jboolean java_lang_Boolean::value(oop obj) { 4504 jvalue v; 4505 java_lang_boxing_object::get_value(obj, &v); 4506 return v.z; 4507 } 4508 4509 static int member_offset(int hardcoded_offset) { 4510 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4511 } 4512 4513 // Compute hard-coded offsets 4514 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4515 // are not available to determine the offset_of_static_fields. 4516 void JavaClasses::compute_hard_coded_offsets() { 4517 4518 // java_lang_boxing_object 4519 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4520 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4521 4522 // java_lang_ref_Reference 4523 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4524 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4525 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4526 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4527 } 4528 4529 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4530 4531 // Compute non-hard-coded field offsets of all the classes in this file 4532 void JavaClasses::compute_offsets() { 4533 if (UseSharedSpaces) { 4534 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4535 JvmtiExport::has_early_class_hook_env()), 4536 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4537 // None of the classes used by the rest of this function can be replaced by 4538 // JMVTI ClassFileLoadHook. 4539 // We are safe to use the archived offsets, which have already been restored 4540 // by JavaClasses::serialize_offsets, without computing the offsets again. 4541 return; 4542 } 4543 4544 // We have already called the compute_offsets() of the 4545 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4546 // earlier inside SystemDictionary::resolve_well_known_classes() 4547 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4548 } 4549 4550 #if INCLUDE_CDS 4551 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4552 4553 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4554 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4555 } 4556 #endif 4557 4558 4559 #ifndef PRODUCT 4560 4561 // These functions exist to assert the validity of hard-coded field offsets to guard 4562 // against changes in the class files 4563 4564 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4565 EXCEPTION_MARK; 4566 fieldDescriptor fd; 4567 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4568 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4569 InstanceKlass* ik = InstanceKlass::cast(k); 4570 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4571 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4572 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4573 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4574 return false; 4575 } 4576 if (fd.is_static()) { 4577 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4578 return false; 4579 } 4580 if (fd.offset() == hardcoded_offset ) { 4581 return true; 4582 } else { 4583 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4584 klass_name, field_name, hardcoded_offset, fd.offset()); 4585 return false; 4586 } 4587 } 4588 4589 // Check the hard-coded field offsets of all the classes in this file 4590 4591 void JavaClasses::check_offsets() { 4592 bool valid = true; 4593 4594 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4595 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4596 4597 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4598 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4599 4600 // Boxed primitive objects (java_lang_boxing_object) 4601 4602 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4603 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4604 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4605 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4606 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4607 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4608 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4609 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4610 4611 // java.lang.ref.Reference 4612 4613 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4614 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4615 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4616 // Fake field 4617 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4618 4619 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4620 } 4621 4622 #endif // PRODUCT 4623 4624 int InjectedField::compute_offset() { 4625 InstanceKlass* ik = InstanceKlass::cast(klass()); 4626 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4627 if (!may_be_java && !fs.access_flags().is_internal()) { 4628 // Only look at injected fields 4629 continue; 4630 } 4631 if (fs.name() == name() && fs.signature() == signature()) { 4632 return fs.offset(); 4633 } 4634 } 4635 ResourceMark rm; 4636 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)" : ""); 4637 #ifndef PRODUCT 4638 ik->print(); 4639 tty->print_cr("all fields:"); 4640 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4641 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4642 } 4643 #endif //PRODUCT 4644 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4645 return -1; 4646 } 4647 4648 void javaClasses_init() { 4649 JavaClasses::compute_offsets(); 4650 JavaClasses::check_offsets(); 4651 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4652 }