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/recordComponent.hpp" 54 #include "oops/typeArrayOop.inline.hpp" 55 #include "prims/jvmtiExport.hpp" 56 #include "prims/resolvedMethodTable.hpp" 57 #include "runtime/fieldDescriptor.inline.hpp" 58 #include "runtime/frame.inline.hpp" 59 #include "runtime/handles.inline.hpp" 60 #include "runtime/interfaceSupport.inline.hpp" 61 #include "runtime/java.hpp" 62 #include "runtime/javaCalls.hpp" 63 #include "runtime/jniHandles.inline.hpp" 64 #include "runtime/safepoint.hpp" 65 #include "runtime/safepointVerifiers.hpp" 66 #include "runtime/thread.inline.hpp" 67 #include "runtime/vframe.inline.hpp" 68 #include "runtime/vm_version.hpp" 69 #include "utilities/align.hpp" 70 #include "utilities/preserveException.hpp" 71 #include "utilities/utf8.hpp" 72 #if INCLUDE_JVMCI 73 #include "jvmci/jvmciJavaClasses.hpp" 74 #endif 75 76 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 77 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 78 79 #if INCLUDE_CDS 80 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 81 f->do_u4((u4*)&_##name##_offset); 82 #endif 83 84 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 85 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 86 87 InjectedField JavaClasses::_injected_fields[] = { 88 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 89 }; 90 91 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 92 return _injected_fields[id].compute_offset(); 93 } 94 95 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 96 *field_count = 0; 97 98 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 99 if (sid == vmSymbols::NO_SID) { 100 // Only well known classes can inject fields 101 return NULL; 102 } 103 104 int count = 0; 105 int start = -1; 106 107 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 108 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 109 count++; \ 110 if (start == -1) start = klass##_##name##_enum; \ 111 } 112 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 113 #undef LOOKUP_INJECTED_FIELD 114 115 if (start != -1) { 116 *field_count = count; 117 return _injected_fields + start; 118 } 119 return NULL; 120 } 121 122 123 // Helpful routine for computing field offsets at run time rather than hardcoding them 124 // Finds local fields only, including static fields. Static field offsets are from the 125 // beginning of the mirror. 126 static void compute_offset(int &dest_offset, 127 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 128 bool is_static = false) { 129 fieldDescriptor fd; 130 if (ik == NULL) { 131 ResourceMark rm; 132 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 133 vm_exit_during_initialization("Invalid layout of well-known class"); 134 } 135 136 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 137 ResourceMark rm; 138 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 139 name_symbol->as_C_string(), signature_symbol->as_C_string()); 140 #ifndef PRODUCT 141 // Prints all fields and offsets 142 Log(class) lt; 143 LogStream ls(lt.error()); 144 ik->print_on(&ls); 145 #endif //PRODUCT 146 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 147 } 148 dest_offset = fd.offset(); 149 } 150 151 // Overloading to pass name as a string. 152 static void compute_offset(int& dest_offset, InstanceKlass* ik, 153 const char* name_string, Symbol* signature_symbol, 154 bool is_static = false) { 155 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 156 if (name == NULL) { 157 ResourceMark rm; 158 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 159 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 160 } 161 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 162 } 163 164 int java_lang_String::value_offset = 0; 165 int java_lang_String::hash_offset = 0; 166 int java_lang_String::hashIsZero_offset = 0; 167 int java_lang_String::coder_offset = 0; 168 169 bool java_lang_String::initialized = false; 170 171 bool java_lang_String::is_instance(oop obj) { 172 return is_instance_inlined(obj); 173 } 174 175 #if INCLUDE_CDS 176 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 177 f->do_u4((u4*)&offset) 178 #endif 179 180 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 181 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 182 183 #define STRING_FIELDS_DO(macro) \ 184 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 185 macro(hash_offset, k, "hash", int_signature, false); \ 186 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 187 macro(coder_offset, k, "coder", byte_signature, false); 188 189 void java_lang_String::compute_offsets() { 190 if (initialized) { 191 return; 192 } 193 194 InstanceKlass* k = SystemDictionary::String_klass(); 195 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 196 197 initialized = true; 198 } 199 200 #if INCLUDE_CDS 201 void java_lang_String::serialize_offsets(SerializeClosure* f) { 202 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 203 f->do_bool(&initialized); 204 } 205 #endif 206 207 class CompactStringsFixup : public FieldClosure { 208 private: 209 bool _value; 210 211 public: 212 CompactStringsFixup(bool value) : _value(value) {} 213 214 void do_field(fieldDescriptor* fd) { 215 if (fd->name() == vmSymbols::compact_strings_name()) { 216 oop mirror = fd->field_holder()->java_mirror(); 217 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 218 assert(mirror != NULL, "String must have mirror already"); 219 mirror->bool_field_put(fd->offset(), _value); 220 } 221 } 222 }; 223 224 void java_lang_String::set_compact_strings(bool value) { 225 CompactStringsFixup fix(value); 226 SystemDictionary::String_klass()->do_local_static_fields(&fix); 227 } 228 229 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 230 assert(initialized, "Must be initialized"); 231 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 232 233 // Create the String object first, so there's a chance that the String 234 // and the char array it points to end up in the same cache line. 235 oop obj; 236 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 237 238 // Create the char array. The String object must be handlized here 239 // because GC can happen as a result of the allocation attempt. 240 Handle h_obj(THREAD, obj); 241 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 242 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 243 244 // Point the String at the char array 245 obj = h_obj(); 246 set_value(obj, buffer); 247 // No need to zero the offset, allocation zero'ed the entire String object 248 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 249 return h_obj; 250 } 251 252 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 253 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 254 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 255 typeArrayOop buffer = value(h_obj()); 256 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 257 if (is_latin1) { 258 for (int index = 0; index < length; index++) { 259 buffer->byte_at_put(index, (jbyte)unicode[index]); 260 } 261 } else { 262 for (int index = 0; index < length; index++) { 263 buffer->char_at_put(index, unicode[index]); 264 } 265 } 266 267 #ifdef ASSERT 268 { 269 ResourceMark rm; 270 char* expected = UNICODE::as_utf8(unicode, length); 271 char* actual = as_utf8_string(h_obj()); 272 if (strcmp(expected, actual) != 0) { 273 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 274 ShouldNotReachHere(); 275 } 276 } 277 #endif 278 279 return h_obj; 280 } 281 282 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 283 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 284 return h_obj(); 285 } 286 287 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 288 if (utf8_str == NULL) { 289 return Handle(); 290 } 291 bool has_multibyte, is_latin1; 292 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 293 if (!CompactStrings) { 294 has_multibyte = true; 295 is_latin1 = false; 296 } 297 298 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 299 if (length > 0) { 300 if (!has_multibyte) { 301 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 302 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 303 } else if (is_latin1) { 304 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 305 } else { 306 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 307 } 308 } 309 310 #ifdef ASSERT 311 // This check is too strict because the input string is not necessarily valid UTF8. 312 // For example, it may be created with arbitrary content via jni_NewStringUTF. 313 /* 314 { 315 ResourceMark rm; 316 const char* expected = utf8_str; 317 char* actual = as_utf8_string(h_obj()); 318 if (strcmp(expected, actual) != 0) { 319 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 320 ShouldNotReachHere(); 321 } 322 } 323 */ 324 #endif 325 326 return h_obj; 327 } 328 329 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 330 Handle h_obj = create_from_str(utf8_str, CHECK_0); 331 return h_obj(); 332 } 333 334 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 335 const char* utf8_str = (char*)symbol->bytes(); 336 int utf8_len = symbol->utf8_length(); 337 338 bool has_multibyte, is_latin1; 339 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 340 if (!CompactStrings) { 341 has_multibyte = true; 342 is_latin1 = false; 343 } 344 345 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 346 if (length > 0) { 347 if (!has_multibyte) { 348 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 349 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 350 } else if (is_latin1) { 351 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 352 } else { 353 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 354 } 355 } 356 357 #ifdef ASSERT 358 { 359 ResourceMark rm; 360 const char* expected = symbol->as_utf8(); 361 char* actual = as_utf8_string(h_obj()); 362 if (strncmp(expected, actual, utf8_len) != 0) { 363 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 364 ShouldNotReachHere(); 365 } 366 } 367 #endif 368 369 return h_obj; 370 } 371 372 // Converts a C string to a Java String based on current encoding 373 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 374 assert(str != NULL, "bad arguments"); 375 376 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 377 static to_java_string_fn_t _to_java_string_fn = NULL; 378 379 if (_to_java_string_fn == NULL) { 380 void *lib_handle = os::native_java_library(); 381 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 382 if (_to_java_string_fn == NULL) { 383 fatal("NewStringPlatform missing"); 384 } 385 } 386 387 jstring js = NULL; 388 { 389 assert(THREAD->is_Java_thread(), "must be java thread"); 390 JavaThread* thread = (JavaThread*)THREAD; 391 HandleMark hm(thread); 392 ThreadToNativeFromVM ttn(thread); 393 js = (_to_java_string_fn)(thread->jni_environment(), str); 394 } 395 396 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 397 JNIHandles::destroy_local(js); // destroy local JNIHandle. 398 return native_platform_string; 399 } 400 401 // Converts a Java String to a native C string that can be used for 402 // native OS calls. 403 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 404 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 405 static to_platform_string_fn_t _to_platform_string_fn = NULL; 406 407 if (_to_platform_string_fn == NULL) { 408 void *lib_handle = os::native_java_library(); 409 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 410 if (_to_platform_string_fn == NULL) { 411 fatal("GetStringPlatformChars missing"); 412 } 413 } 414 415 char *native_platform_string; 416 { JavaThread* thread = (JavaThread*)THREAD; 417 assert(thread->is_Java_thread(), "must be java thread"); 418 JNIEnv *env = thread->jni_environment(); 419 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 420 bool is_copy; 421 HandleMark hm(thread); 422 ThreadToNativeFromVM ttn(thread); 423 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 424 assert(is_copy == JNI_TRUE, "is_copy value changed"); 425 JNIHandles::destroy_local(js); 426 } 427 return native_platform_string; 428 } 429 430 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 431 oop obj = java_string(); 432 // Typical usage is to convert all '/' to '.' in string. 433 typeArrayOop value = java_lang_String::value(obj); 434 int length = java_lang_String::length(obj, value); 435 bool is_latin1 = java_lang_String::is_latin1(obj); 436 437 // First check if any from_char exist 438 int index; // Declared outside, used later 439 for (index = 0; index < length; index++) { 440 jchar c = !is_latin1 ? value->char_at(index) : 441 ((jchar) value->byte_at(index)) & 0xff; 442 if (c == from_char) { 443 break; 444 } 445 } 446 if (index == length) { 447 // No from_char, so do not copy. 448 return java_string; 449 } 450 451 // Check if result string will be latin1 452 bool to_is_latin1 = false; 453 454 // Replacement char must be latin1 455 if (CompactStrings && UNICODE::is_latin1(to_char)) { 456 if (is_latin1) { 457 // Source string is latin1 as well 458 to_is_latin1 = true; 459 } else if (!UNICODE::is_latin1(from_char)) { 460 // We are replacing an UTF16 char. Scan string to 461 // check if result can be latin1 encoded. 462 to_is_latin1 = true; 463 for (index = 0; index < length; index++) { 464 jchar c = value->char_at(index); 465 if (c != from_char && !UNICODE::is_latin1(c)) { 466 to_is_latin1 = false; 467 break; 468 } 469 } 470 } 471 } 472 473 // Create new UNICODE (or byte) buffer. Must handlize value because GC 474 // may happen during String and char array creation. 475 typeArrayHandle h_value(THREAD, value); 476 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 477 typeArrayOop from_buffer = h_value(); 478 typeArrayOop to_buffer = java_lang_String::value(string()); 479 480 // Copy contents 481 for (index = 0; index < length; index++) { 482 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 483 ((jchar) from_buffer->byte_at(index)) & 0xff; 484 if (c == from_char) { 485 c = to_char; 486 } 487 if (!to_is_latin1) { 488 to_buffer->char_at_put(index, c); 489 } else { 490 to_buffer->byte_at_put(index, (jbyte) c); 491 } 492 } 493 return string; 494 } 495 496 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 497 typeArrayOop value = java_lang_String::value(java_string); 498 length = java_lang_String::length(java_string, value); 499 bool is_latin1 = java_lang_String::is_latin1(java_string); 500 501 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 502 if (result != NULL) { 503 if (!is_latin1) { 504 for (int index = 0; index < length; index++) { 505 result[index] = value->char_at(index); 506 } 507 } else { 508 for (int index = 0; index < length; index++) { 509 result[index] = ((jchar) value->byte_at(index)) & 0xff; 510 } 511 } 512 } else { 513 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 514 } 515 return result; 516 } 517 518 unsigned int java_lang_String::hash_code(oop java_string) { 519 // The hash and hashIsZero fields are subject to a benign data race, 520 // making it crucial to ensure that any observable result of the 521 // calculation in this method stays correct under any possible read of 522 // these fields. Necessary restrictions to allow this to be correct 523 // without explicit memory fences or similar concurrency primitives is 524 // that we can ever only write to one of these two fields for a given 525 // String instance, and that the computation is idempotent and derived 526 // from immutable state 527 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 528 if (java_lang_String::hash_is_set(java_string)) { 529 return java_string->int_field(hash_offset); 530 } 531 532 typeArrayOop value = java_lang_String::value(java_string); 533 int length = java_lang_String::length(java_string, value); 534 bool is_latin1 = java_lang_String::is_latin1(java_string); 535 536 unsigned int hash = 0; 537 if (length > 0) { 538 if (is_latin1) { 539 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 540 } else { 541 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 542 } 543 } 544 545 if (hash != 0) { 546 java_string->int_field_put(hash_offset, hash); 547 } else { 548 java_string->bool_field_put(hashIsZero_offset, true); 549 } 550 return hash; 551 } 552 553 char* java_lang_String::as_quoted_ascii(oop java_string) { 554 typeArrayOop value = java_lang_String::value(java_string); 555 int length = java_lang_String::length(java_string, value); 556 bool is_latin1 = java_lang_String::is_latin1(java_string); 557 558 if (length == 0) return NULL; 559 560 char* result; 561 int result_length; 562 if (!is_latin1) { 563 jchar* base = value->char_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 } else { 568 jbyte* base = value->byte_at_addr(0); 569 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 570 result = NEW_RESOURCE_ARRAY(char, result_length); 571 UNICODE::as_quoted_ascii(base, length, result, result_length); 572 } 573 assert(result_length >= length + 1, "must not be shorter"); 574 assert(result_length == (int)strlen(result) + 1, "must match"); 575 return result; 576 } 577 578 Symbol* java_lang_String::as_symbol(oop java_string) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string, value); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 584 Symbol* sym = SymbolTable::new_symbol(base, length); 585 return sym; 586 } else { 587 ResourceMark rm; 588 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 589 const char* base = UNICODE::as_utf8(position, length); 590 Symbol* sym = SymbolTable::new_symbol(base, length); 591 return sym; 592 } 593 } 594 595 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 596 typeArrayOop value = java_lang_String::value(java_string); 597 int length = java_lang_String::length(java_string, value); 598 bool is_latin1 = java_lang_String::is_latin1(java_string); 599 if (!is_latin1) { 600 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 601 return SymbolTable::probe_unicode(base, length); 602 } else { 603 ResourceMark rm; 604 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 605 const char* base = UNICODE::as_utf8(position, length); 606 return SymbolTable::probe(base, length); 607 } 608 } 609 610 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 611 assert(value_equals(value, java_lang_String::value(java_string)), 612 "value must be same as java_lang_String::value(java_string)"); 613 int length = java_lang_String::length(java_string, value); 614 if (length == 0) { 615 return 0; 616 } 617 if (!java_lang_String::is_latin1(java_string)) { 618 return UNICODE::utf8_length(value->char_at_addr(0), length); 619 } else { 620 return UNICODE::utf8_length(value->byte_at_addr(0), length); 621 } 622 } 623 624 int java_lang_String::utf8_length(oop java_string) { 625 typeArrayOop value = java_lang_String::value(java_string); 626 return utf8_length(java_string, value); 627 } 628 629 char* java_lang_String::as_utf8_string(oop java_string) { 630 typeArrayOop value = java_lang_String::value(java_string); 631 int length = java_lang_String::length(java_string, value); 632 bool is_latin1 = java_lang_String::is_latin1(java_string); 633 if (!is_latin1) { 634 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 635 return UNICODE::as_utf8(position, length); 636 } else { 637 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 638 return UNICODE::as_utf8(position, length); 639 } 640 } 641 642 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 643 assert(value_equals(value, java_lang_String::value(java_string)), 644 "value must be same as java_lang_String::value(java_string)"); 645 int length = java_lang_String::length(java_string, value); 646 bool is_latin1 = java_lang_String::is_latin1(java_string); 647 if (!is_latin1) { 648 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 649 return UNICODE::as_utf8(position, length, buf, buflen); 650 } else { 651 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 652 return UNICODE::as_utf8(position, length, buf, buflen); 653 } 654 } 655 656 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 657 typeArrayOop value = java_lang_String::value(java_string); 658 return as_utf8_string(java_string, value, buf, buflen); 659 } 660 661 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 662 typeArrayOop value = java_lang_String::value(java_string); 663 bool is_latin1 = java_lang_String::is_latin1(java_string); 664 assert(start + len <= java_lang_String::length(java_string), "just checking"); 665 if (!is_latin1) { 666 jchar* position = value->char_at_addr(start); 667 return UNICODE::as_utf8(position, len); 668 } else { 669 jbyte* position = value->byte_at_addr(start); 670 return UNICODE::as_utf8(position, len); 671 } 672 } 673 674 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 675 assert(value_equals(value, java_lang_String::value(java_string)), 676 "value must be same as java_lang_String::value(java_string)"); 677 assert(start + len <= java_lang_String::length(java_string), "just checking"); 678 bool is_latin1 = java_lang_String::is_latin1(java_string); 679 if (!is_latin1) { 680 jchar* position = value->char_at_addr(start); 681 return UNICODE::as_utf8(position, len, buf, buflen); 682 } else { 683 jbyte* position = value->byte_at_addr(start); 684 return UNICODE::as_utf8(position, len, buf, buflen); 685 } 686 } 687 688 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 689 assert(java_string->klass() == SystemDictionary::String_klass(), 690 "must be java_string"); 691 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 692 int length = java_lang_String::length(java_string, value); 693 if (length != len) { 694 return false; 695 } 696 bool is_latin1 = java_lang_String::is_latin1(java_string); 697 if (!is_latin1) { 698 for (int i = 0; i < len; i++) { 699 if (value->char_at(i) != chars[i]) { 700 return false; 701 } 702 } 703 } else { 704 for (int i = 0; i < len; i++) { 705 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 706 return false; 707 } 708 } 709 } 710 return true; 711 } 712 713 bool java_lang_String::equals(oop str1, oop str2) { 714 assert(str1->klass() == SystemDictionary::String_klass(), 715 "must be java String"); 716 assert(str2->klass() == SystemDictionary::String_klass(), 717 "must be java String"); 718 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 719 bool is_latin1 = java_lang_String::is_latin1(str1); 720 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 721 bool is_latin2 = java_lang_String::is_latin1(str2); 722 723 if (is_latin1 != is_latin2) { 724 // Strings with different coders are never equal. 725 return false; 726 } 727 return value_equals(value1, value2); 728 } 729 730 void java_lang_String::print(oop java_string, outputStream* st) { 731 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 732 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 733 734 if (value == NULL) { 735 // This can happen if, e.g., printing a String 736 // object before its initializer has been called 737 st->print("NULL"); 738 return; 739 } 740 741 int length = java_lang_String::length(java_string, value); 742 bool is_latin1 = java_lang_String::is_latin1(java_string); 743 744 st->print("\""); 745 for (int index = 0; index < length; index++) { 746 st->print("%c", (!is_latin1) ? value->char_at(index) : 747 ((jchar) value->byte_at(index)) & 0xff ); 748 } 749 st->print("\""); 750 } 751 752 753 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 754 assert(mirror.not_null() && fd->is_static(), "just checking"); 755 if (fd->has_initial_value()) { 756 BasicType t = fd->field_type(); 757 switch (t) { 758 case T_BYTE: 759 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 760 break; 761 case T_BOOLEAN: 762 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 763 break; 764 case T_CHAR: 765 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 766 break; 767 case T_SHORT: 768 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 769 break; 770 case T_INT: 771 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 772 break; 773 case T_FLOAT: 774 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 775 break; 776 case T_DOUBLE: 777 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 778 break; 779 case T_LONG: 780 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 781 break; 782 case T_OBJECT: 783 { 784 assert(fd->signature() == vmSymbols::string_signature(), 785 "just checking"); 786 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 787 // Archive the String field and update the pointer. 788 oop s = mirror()->obj_field(fd->offset()); 789 oop archived_s = StringTable::create_archived_string(s, CHECK); 790 mirror()->obj_field_put(fd->offset(), archived_s); 791 } else { 792 oop string = fd->string_initial_value(CHECK); 793 mirror()->obj_field_put(fd->offset(), string); 794 } 795 } 796 break; 797 default: 798 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 799 "Illegal ConstantValue attribute in class file"); 800 } 801 } 802 } 803 804 805 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 806 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 807 808 // If the offset was read from the shared archive, it was fixed up already 809 if (!k->is_shared()) { 810 if (k->is_instance_klass()) { 811 // During bootstrap, java.lang.Class wasn't loaded so static field 812 // offsets were computed without the size added it. Go back and 813 // update all the static field offsets to included the size. 814 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 815 if (fs.access_flags().is_static()) { 816 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 817 fs.set_offset(real_offset); 818 } 819 } 820 } 821 } 822 823 if (k->is_shared() && k->has_raw_archived_mirror()) { 824 if (HeapShared::open_archive_heap_region_mapped()) { 825 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 826 assert(present, "Missing archived mirror for %s", k->external_name()); 827 return; 828 } else { 829 k->set_java_mirror_handle(NULL); 830 k->clear_has_raw_archived_mirror(); 831 } 832 } 833 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 834 } 835 836 void java_lang_Class::initialize_mirror_fields(Klass* k, 837 Handle mirror, 838 Handle protection_domain, 839 TRAPS) { 840 // Allocate a simple java object for a lock. 841 // This needs to be a java object because during class initialization 842 // it can be held across a java call. 843 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 844 set_init_lock(mirror(), r); 845 846 // Set protection domain also 847 set_protection_domain(mirror(), protection_domain()); 848 849 // Initialize static fields 850 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 851 } 852 853 // Set the java.lang.Module module field in the java_lang_Class mirror 854 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 855 if (module.is_null()) { 856 // During startup, the module may be NULL only if java.base has not been defined yet. 857 // Put the class on the fixup_module_list to patch later when the java.lang.Module 858 // for java.base is known. But note that since we captured the NULL module another 859 // thread may have completed that initialization. 860 861 bool javabase_was_defined = false; 862 { 863 MutexLocker m1(Module_lock, THREAD); 864 // Keep list of classes needing java.base module fixup 865 if (!ModuleEntryTable::javabase_defined()) { 866 assert(k->java_mirror() != NULL, "Class's mirror is null"); 867 k->class_loader_data()->inc_keep_alive(); 868 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 869 fixup_module_field_list()->push(k); 870 } else { 871 javabase_was_defined = true; 872 } 873 } 874 875 // If java.base was already defined then patch this particular class with java.base. 876 if (javabase_was_defined) { 877 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 878 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 879 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 880 Handle javabase_handle(THREAD, javabase_entry->module()); 881 set_module(mirror(), javabase_handle()); 882 } 883 } else { 884 assert(Universe::is_module_initialized() || 885 (ModuleEntryTable::javabase_defined() && 886 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 887 "Incorrect java.lang.Module specification while creating mirror"); 888 set_module(mirror(), module()); 889 } 890 } 891 892 // Statically allocate fixup lists because they always get created. 893 void java_lang_Class::allocate_fixup_lists() { 894 GrowableArray<Klass*>* mirror_list = 895 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 896 set_fixup_mirror_list(mirror_list); 897 898 GrowableArray<Klass*>* module_list = 899 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 900 set_fixup_module_field_list(module_list); 901 } 902 903 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 904 Handle module, Handle protection_domain, TRAPS) { 905 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 906 assert(k->java_mirror() == NULL, "should only assign mirror once"); 907 908 // Use this moment of initialization to cache modifier_flags also, 909 // to support Class.getModifiers(). Instance classes recalculate 910 // the cached flags after the class file is parsed, but before the 911 // class is put into the system dictionary. 912 int computed_modifiers = k->compute_modifier_flags(CHECK); 913 k->set_modifier_flags(computed_modifiers); 914 // Class_klass has to be loaded because it is used to allocate 915 // the mirror. 916 if (SystemDictionary::Class_klass_loaded()) { 917 // Allocate mirror (java.lang.Class instance) 918 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 919 Handle mirror(THREAD, mirror_oop); 920 Handle comp_mirror; 921 922 // Setup indirection from mirror->klass 923 java_lang_Class::set_klass(mirror(), k); 924 925 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 926 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 927 928 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 929 930 // It might also have a component mirror. This mirror must already exist. 931 if (k->is_array_klass()) { 932 if (k->is_typeArray_klass()) { 933 BasicType type = TypeArrayKlass::cast(k)->element_type(); 934 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 935 } else { 936 assert(k->is_objArray_klass(), "Must be"); 937 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 938 assert(element_klass != NULL, "Must have an element klass"); 939 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 940 } 941 assert(comp_mirror() != NULL, "must have a mirror"); 942 943 // Two-way link between the array klass and its component mirror: 944 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 945 set_component_mirror(mirror(), comp_mirror()); 946 // See below for ordering dependencies between field array_klass in component mirror 947 // and java_mirror in this klass. 948 } else { 949 assert(k->is_instance_klass(), "Must be"); 950 951 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 952 if (HAS_PENDING_EXCEPTION) { 953 // If any of the fields throws an exception like OOM remove the klass field 954 // from the mirror so GC doesn't follow it after the klass has been deallocated. 955 // This mirror looks like a primitive type, which logically it is because it 956 // it represents no class. 957 java_lang_Class::set_klass(mirror(), NULL); 958 return; 959 } 960 } 961 962 // set the classLoader field in the java_lang_Class instance 963 assert(class_loader() == k->class_loader(), "should be same"); 964 set_class_loader(mirror(), class_loader()); 965 966 // Setup indirection from klass->mirror 967 // after any exceptions can happen during allocations. 968 k->set_java_mirror(mirror); 969 970 // Set the module field in the java_lang_Class instance. This must be done 971 // after the mirror is set. 972 set_mirror_module_field(k, mirror, module, THREAD); 973 974 if (comp_mirror() != NULL) { 975 // Set after k->java_mirror() is published, because compiled code running 976 // concurrently doesn't expect a k to have a null java_mirror. 977 release_set_array_klass(comp_mirror(), k); 978 } 979 } else { 980 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 981 fixup_mirror_list()->push(k); 982 } 983 } 984 985 #if INCLUDE_CDS_JAVA_HEAP 986 // Clears mirror fields. Static final fields with initial values are reloaded 987 // from constant pool. The object identity hash is in the object header and is 988 // not affected. 989 class ResetMirrorField: public FieldClosure { 990 private: 991 Handle _m; 992 993 public: 994 ResetMirrorField(Handle mirror) : _m(mirror) {} 995 996 void do_field(fieldDescriptor* fd) { 997 assert(DumpSharedSpaces, "dump time only"); 998 assert(_m.not_null(), "Mirror cannot be NULL"); 999 1000 if (fd->is_static() && fd->has_initial_value()) { 1001 initialize_static_field(fd, _m, Thread::current()); 1002 return; 1003 } 1004 1005 BasicType ft = fd->field_type(); 1006 switch (ft) { 1007 case T_BYTE: 1008 _m()->byte_field_put(fd->offset(), 0); 1009 break; 1010 case T_CHAR: 1011 _m()->char_field_put(fd->offset(), 0); 1012 break; 1013 case T_DOUBLE: 1014 _m()->double_field_put(fd->offset(), 0); 1015 break; 1016 case T_FLOAT: 1017 _m()->float_field_put(fd->offset(), 0); 1018 break; 1019 case T_INT: 1020 _m()->int_field_put(fd->offset(), 0); 1021 break; 1022 case T_LONG: 1023 _m()->long_field_put(fd->offset(), 0); 1024 break; 1025 case T_SHORT: 1026 _m()->short_field_put(fd->offset(), 0); 1027 break; 1028 case T_BOOLEAN: 1029 _m()->bool_field_put(fd->offset(), false); 1030 break; 1031 case T_ARRAY: 1032 case T_OBJECT: { 1033 // It might be useful to cache the String field, but 1034 // for now just clear out any reference field 1035 oop o = _m()->obj_field(fd->offset()); 1036 _m()->obj_field_put(fd->offset(), NULL); 1037 break; 1038 } 1039 default: 1040 ShouldNotReachHere(); 1041 break; 1042 } 1043 } 1044 }; 1045 1046 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1047 assert(HeapShared::is_heap_object_archiving_allowed(), 1048 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1049 1050 for (int t = 0; t <= T_VOID; t++) { 1051 oop m = Universe::_mirrors[t]; 1052 if (m != NULL) { 1053 // Update the field at _array_klass_offset to point to the relocated array klass. 1054 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1055 assert(archived_m != NULL, "sanity"); 1056 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1057 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1058 if (ak != NULL) { 1059 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1060 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1061 } 1062 1063 // Clear the fields. Just to be safe 1064 Klass *k = m->klass(); 1065 Handle archived_mirror_h(THREAD, archived_m); 1066 ResetMirrorField reset(archived_mirror_h); 1067 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1068 1069 log_trace(cds, heap, mirror)( 1070 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1071 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1072 1073 Universe::_mirrors[t] = archived_m; 1074 } 1075 } 1076 1077 assert(Universe::_mirrors[T_INT] != NULL && 1078 Universe::_mirrors[T_FLOAT] != NULL && 1079 Universe::_mirrors[T_DOUBLE] != NULL && 1080 Universe::_mirrors[T_BYTE] != NULL && 1081 Universe::_mirrors[T_BOOLEAN] != NULL && 1082 Universe::_mirrors[T_CHAR] != NULL && 1083 Universe::_mirrors[T_LONG] != NULL && 1084 Universe::_mirrors[T_SHORT] != NULL && 1085 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1086 1087 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1088 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1089 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1090 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1091 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1092 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1093 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1094 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1095 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1096 } 1097 1098 // 1099 // After the mirror object is successfully archived, the archived 1100 // klass is set with _has_archived_raw_mirror flag. 1101 // 1102 // The _has_archived_raw_mirror flag is cleared at runtime when the 1103 // archived mirror is restored. If archived java heap data cannot 1104 // be used at runtime, new mirror object is created for the shared 1105 // class. The _has_archived_raw_mirror is cleared also during the process. 1106 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1107 assert(HeapShared::is_heap_object_archiving_allowed(), 1108 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1109 1110 // Mirror is already archived 1111 if (k->has_raw_archived_mirror()) { 1112 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1113 return k->archived_java_mirror_raw(); 1114 } 1115 1116 // No mirror 1117 oop mirror = k->java_mirror(); 1118 if (mirror == NULL) { 1119 return NULL; 1120 } 1121 1122 if (k->is_instance_klass()) { 1123 InstanceKlass *ik = InstanceKlass::cast(k); 1124 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1125 1126 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1127 ik->is_shared_app_class())) { 1128 // Archiving mirror for classes from non-builtin loaders is not 1129 // supported. Clear the _java_mirror within the archived class. 1130 k->set_java_mirror_handle(NULL); 1131 return NULL; 1132 } 1133 } 1134 1135 // Now start archiving the mirror object 1136 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1137 if (archived_mirror == NULL) { 1138 return NULL; 1139 } 1140 1141 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1142 if (archived_mirror == NULL) { 1143 return NULL; 1144 } 1145 1146 k->set_archived_java_mirror_raw(archived_mirror); 1147 1148 k->set_has_raw_archived_mirror(); 1149 1150 ResourceMark rm; 1151 log_trace(cds, heap, mirror)( 1152 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1153 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1154 1155 return archived_mirror; 1156 } 1157 1158 // The process is based on create_mirror(). 1159 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1160 oop archived_mirror, 1161 Thread *THREAD) { 1162 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1163 // to archived metadata and objects below. 1164 Klass *c = archived_mirror->klass(); 1165 Handle archived_mirror_h(THREAD, archived_mirror); 1166 ResetMirrorField reset(archived_mirror_h); 1167 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1168 1169 if (k->is_array_klass()) { 1170 oop archived_comp_mirror; 1171 if (k->is_typeArray_klass()) { 1172 // The primitive type mirrors are already archived. Get the archived mirror. 1173 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1174 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1175 assert(archived_comp_mirror != NULL, "Must be"); 1176 } else { 1177 assert(k->is_objArray_klass(), "Must be"); 1178 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1179 assert(element_klass != NULL, "Must have an element klass"); 1180 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1181 if (archived_comp_mirror == NULL) { 1182 return NULL; 1183 } 1184 } 1185 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1186 } else { 1187 assert(k->is_instance_klass(), "Must be"); 1188 1189 // Reset local static fields in the mirror 1190 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1191 1192 java_lang_Class:set_init_lock(archived_mirror, NULL); 1193 1194 set_protection_domain(archived_mirror, NULL); 1195 } 1196 1197 // clear class loader and mirror_module_field 1198 set_class_loader(archived_mirror, NULL); 1199 set_module(archived_mirror, NULL); 1200 1201 // The archived mirror's field at _klass_offset is still pointing to the original 1202 // klass. Updated the field in the archived mirror to point to the relocated 1203 // klass in the archive. 1204 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1205 log_debug(cds, heap, mirror)( 1206 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1207 p2i(as_Klass(mirror)), p2i(reloc_k)); 1208 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1209 1210 // The field at _array_klass_offset is pointing to the original one dimension 1211 // higher array klass if exists. Relocate the pointer. 1212 Klass *arr = array_klass_acquire(mirror); 1213 if (arr != NULL) { 1214 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1215 log_debug(cds, heap, mirror)( 1216 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1217 p2i(arr), p2i(reloc_arr)); 1218 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1219 } 1220 return archived_mirror; 1221 } 1222 1223 // Returns true if the mirror is updated, false if no archived mirror 1224 // data is present. After the archived mirror object is restored, the 1225 // shared klass' _has_raw_archived_mirror flag is cleared. 1226 bool java_lang_Class::restore_archived_mirror(Klass *k, 1227 Handle class_loader, Handle module, 1228 Handle protection_domain, TRAPS) { 1229 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1230 // see more details in SystemDictionary::resolve_well_known_classes(). 1231 if (!SystemDictionary::Class_klass_loaded()) { 1232 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1233 fixup_mirror_list()->push(k); 1234 return true; 1235 } 1236 1237 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1238 1239 if (m == NULL) { 1240 return false; 1241 } 1242 1243 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1244 1245 // mirror is archived, restore 1246 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1247 Handle mirror(THREAD, m); 1248 1249 if (!k->is_array_klass()) { 1250 // - local static final fields with initial values were initialized at dump time 1251 1252 // create the init_lock 1253 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1254 set_init_lock(mirror(), r); 1255 1256 if (protection_domain.not_null()) { 1257 set_protection_domain(mirror(), protection_domain()); 1258 } 1259 } 1260 1261 assert(class_loader() == k->class_loader(), "should be same"); 1262 if (class_loader.not_null()) { 1263 set_class_loader(mirror(), class_loader()); 1264 } 1265 1266 k->set_java_mirror(mirror); 1267 k->clear_has_raw_archived_mirror(); 1268 1269 set_mirror_module_field(k, mirror, module, THREAD); 1270 1271 ResourceMark rm; 1272 log_trace(cds, heap, mirror)( 1273 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1274 1275 return true; 1276 } 1277 #endif // INCLUDE_CDS_JAVA_HEAP 1278 1279 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1280 assert(_module_offset != 0, "must have been computed already"); 1281 java_lang_Class::set_module(k->java_mirror(), module()); 1282 } 1283 1284 int java_lang_Class::oop_size(oop java_class) { 1285 assert(_oop_size_offset != 0, "must be set"); 1286 int size = java_class->int_field(_oop_size_offset); 1287 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1288 return size; 1289 } 1290 1291 1292 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1293 assert(_oop_size_offset != 0, "must be set"); 1294 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1295 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1296 } 1297 1298 int java_lang_Class::static_oop_field_count(oop java_class) { 1299 assert(_static_oop_field_count_offset != 0, "must be set"); 1300 return java_class->int_field(_static_oop_field_count_offset); 1301 } 1302 1303 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1304 assert(_static_oop_field_count_offset != 0, "must be set"); 1305 return java_class->int_field_raw(_static_oop_field_count_offset); 1306 } 1307 1308 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1309 assert(_static_oop_field_count_offset != 0, "must be set"); 1310 java_class->int_field_put(_static_oop_field_count_offset, size); 1311 } 1312 1313 oop java_lang_Class::protection_domain(oop java_class) { 1314 assert(_protection_domain_offset != 0, "must be set"); 1315 return java_class->obj_field(_protection_domain_offset); 1316 } 1317 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1318 assert(_protection_domain_offset != 0, "must be set"); 1319 java_class->obj_field_put(_protection_domain_offset, pd); 1320 } 1321 1322 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1323 assert(_component_mirror_offset != 0, "must be set"); 1324 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1325 } 1326 oop java_lang_Class::component_mirror(oop java_class) { 1327 assert(_component_mirror_offset != 0, "must be set"); 1328 return java_class->obj_field(_component_mirror_offset); 1329 } 1330 1331 oop java_lang_Class::init_lock(oop java_class) { 1332 assert(_init_lock_offset != 0, "must be set"); 1333 return java_class->obj_field(_init_lock_offset); 1334 } 1335 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1336 assert(_init_lock_offset != 0, "must be set"); 1337 java_class->obj_field_put(_init_lock_offset, init_lock); 1338 } 1339 1340 objArrayOop java_lang_Class::signers(oop java_class) { 1341 assert(_signers_offset != 0, "must be set"); 1342 return (objArrayOop)java_class->obj_field(_signers_offset); 1343 } 1344 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1345 assert(_signers_offset != 0, "must be set"); 1346 java_class->obj_field_put(_signers_offset, (oop)signers); 1347 } 1348 1349 1350 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1351 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1352 if (_class_loader_offset != 0) { 1353 java_class->obj_field_put(_class_loader_offset, loader); 1354 } 1355 } 1356 1357 oop java_lang_Class::class_loader(oop java_class) { 1358 assert(_class_loader_offset != 0, "must be set"); 1359 return java_class->obj_field(_class_loader_offset); 1360 } 1361 1362 oop java_lang_Class::module(oop java_class) { 1363 assert(_module_offset != 0, "must be set"); 1364 return java_class->obj_field(_module_offset); 1365 } 1366 1367 void java_lang_Class::set_module(oop java_class, oop module) { 1368 assert(_module_offset != 0, "must be set"); 1369 java_class->obj_field_put(_module_offset, module); 1370 } 1371 1372 oop java_lang_Class::name(Handle java_class, TRAPS) { 1373 assert(_name_offset != 0, "must be set"); 1374 oop o = java_class->obj_field(_name_offset); 1375 if (o == NULL) { 1376 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1377 java_class->obj_field_put(_name_offset, o); 1378 } 1379 return o; 1380 } 1381 1382 oop java_lang_Class::source_file(oop java_class) { 1383 assert(_source_file_offset != 0, "must be set"); 1384 return java_class->obj_field(_source_file_offset); 1385 } 1386 1387 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1388 assert(_source_file_offset != 0, "must be set"); 1389 java_class->obj_field_put(_source_file_offset, source_file); 1390 } 1391 1392 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1393 // This should be improved by adding a field at the Java level or by 1394 // introducing a new VM klass (see comment in ClassFileParser) 1395 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1396 if (type != T_VOID) { 1397 Klass* aklass = Universe::typeArrayKlassObj(type); 1398 assert(aklass != NULL, "correct bootstrap"); 1399 release_set_array_klass(java_class, aklass); 1400 } 1401 #ifdef ASSERT 1402 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1403 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1404 #endif 1405 return java_class; 1406 } 1407 1408 1409 Klass* java_lang_Class::as_Klass(oop java_class) { 1410 //%note memory_2 1411 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1412 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1413 assert(k == NULL || k->is_klass(), "type check"); 1414 return k; 1415 } 1416 1417 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1418 //%note memory_2 1419 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1420 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1421 assert(k == NULL || k->is_klass(), "type check"); 1422 return k; 1423 } 1424 1425 1426 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1427 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1428 java_class->metadata_field_put(_klass_offset, klass); 1429 } 1430 1431 1432 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1433 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1434 Symbol* name = NULL; 1435 bool is_instance = false; 1436 if (is_primitive(java_class)) { 1437 name = vmSymbols::type_signature(primitive_type(java_class)); 1438 } else { 1439 Klass* k = as_Klass(java_class); 1440 is_instance = k->is_instance_klass(); 1441 name = k->name(); 1442 } 1443 if (name == NULL) { 1444 st->print("<null>"); 1445 return; 1446 } 1447 if (is_instance) st->print("L"); 1448 st->write((char*) name->base(), (int) name->utf8_length()); 1449 if (is_instance) st->print(";"); 1450 } 1451 1452 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1453 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1454 Symbol* name; 1455 if (is_primitive(java_class)) { 1456 name = vmSymbols::type_signature(primitive_type(java_class)); 1457 // Because this can create a new symbol, the caller has to decrement 1458 // the refcount, so make adjustment here and below for symbols returned 1459 // that are not created or incremented due to a successful lookup. 1460 name->increment_refcount(); 1461 } else { 1462 Klass* k = as_Klass(java_class); 1463 if (!k->is_instance_klass()) { 1464 name = k->name(); 1465 name->increment_refcount(); 1466 } else { 1467 ResourceMark rm; 1468 const char* sigstr = k->signature_name(); 1469 int siglen = (int) strlen(sigstr); 1470 if (!intern_if_not_found) { 1471 name = SymbolTable::probe(sigstr, siglen); 1472 } else { 1473 name = SymbolTable::new_symbol(sigstr, siglen); 1474 } 1475 } 1476 } 1477 return name; 1478 } 1479 1480 // Returns the Java name for this Java mirror (Resource allocated) 1481 // See Klass::external_name(). 1482 // For primitive type Java mirrors, its type name is returned. 1483 const char* java_lang_Class::as_external_name(oop java_class) { 1484 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1485 const char* name = NULL; 1486 if (is_primitive(java_class)) { 1487 name = type2name(primitive_type(java_class)); 1488 } else { 1489 name = as_Klass(java_class)->external_name(); 1490 } 1491 if (name == NULL) { 1492 name = "<null>"; 1493 } 1494 return name; 1495 } 1496 1497 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1498 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1499 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1500 return k; 1501 } 1502 1503 1504 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1505 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1506 java_class->release_metadata_field_put(_array_klass_offset, klass); 1507 } 1508 1509 1510 BasicType java_lang_Class::primitive_type(oop java_class) { 1511 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1512 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1513 BasicType type = T_VOID; 1514 if (ak != NULL) { 1515 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1516 type = ArrayKlass::cast(ak)->element_type(); 1517 } else { 1518 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1519 } 1520 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1521 return type; 1522 } 1523 1524 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1525 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1526 if (is_primitive(java_class)) { 1527 if (reference_klass != NULL) 1528 (*reference_klass) = NULL; 1529 return primitive_type(java_class); 1530 } else { 1531 if (reference_klass != NULL) 1532 (*reference_klass) = as_Klass(java_class); 1533 return T_OBJECT; 1534 } 1535 } 1536 1537 1538 oop java_lang_Class::primitive_mirror(BasicType t) { 1539 oop mirror = Universe::java_mirror(t); 1540 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1541 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1542 return mirror; 1543 } 1544 1545 bool java_lang_Class::offsets_computed = false; 1546 int java_lang_Class::classRedefinedCount_offset = -1; 1547 1548 #define CLASS_FIELDS_DO(macro) \ 1549 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1550 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1551 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1552 macro(_module_offset, k, "module", module_signature, false); \ 1553 macro(_name_offset, k, "name", string_signature, false); \ 1554 1555 void java_lang_Class::compute_offsets() { 1556 if (offsets_computed) { 1557 return; 1558 } 1559 1560 offsets_computed = true; 1561 1562 InstanceKlass* k = SystemDictionary::Class_klass(); 1563 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1564 1565 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1566 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1567 // GC treats them the same. 1568 _init_lock_offset = _component_mirror_offset; 1569 1570 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1571 } 1572 1573 #if INCLUDE_CDS 1574 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1575 f->do_bool(&offsets_computed); 1576 f->do_u4((u4*)&_init_lock_offset); 1577 1578 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1579 1580 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1581 } 1582 #endif 1583 1584 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1585 if (classRedefinedCount_offset == -1) { 1586 // If we don't have an offset for it then just return -1 as a marker. 1587 return -1; 1588 } 1589 1590 return the_class_mirror->int_field(classRedefinedCount_offset); 1591 } 1592 1593 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1594 if (classRedefinedCount_offset == -1) { 1595 // If we don't have an offset for it then nothing to set. 1596 return; 1597 } 1598 1599 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1600 } 1601 1602 1603 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1604 // platform thread structure, and a eetop offset which was used for thread 1605 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1606 // merged, so in the HotSpot VM we just use the eetop field for the thread 1607 // instead of the privateInfo_offset. 1608 // 1609 // Note: The stackSize field is only present starting in 1.4. 1610 1611 int java_lang_Thread::_name_offset = 0; 1612 int java_lang_Thread::_group_offset = 0; 1613 int java_lang_Thread::_contextClassLoader_offset = 0; 1614 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1615 int java_lang_Thread::_priority_offset = 0; 1616 int java_lang_Thread::_eetop_offset = 0; 1617 int java_lang_Thread::_daemon_offset = 0; 1618 int java_lang_Thread::_stillborn_offset = 0; 1619 int java_lang_Thread::_stackSize_offset = 0; 1620 int java_lang_Thread::_tid_offset = 0; 1621 int java_lang_Thread::_thread_status_offset = 0; 1622 int java_lang_Thread::_park_blocker_offset = 0; 1623 1624 #define THREAD_FIELDS_DO(macro) \ 1625 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1626 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1627 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1628 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1629 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1630 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1631 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1632 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1633 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1634 macro(_tid_offset, k, "tid", long_signature, false); \ 1635 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1636 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false) 1637 1638 void java_lang_Thread::compute_offsets() { 1639 assert(_group_offset == 0, "offsets should be initialized only once"); 1640 1641 InstanceKlass* k = SystemDictionary::Thread_klass(); 1642 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1643 } 1644 1645 #if INCLUDE_CDS 1646 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1647 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1648 } 1649 #endif 1650 1651 JavaThread* java_lang_Thread::thread(oop java_thread) { 1652 return (JavaThread*)java_thread->address_field(_eetop_offset); 1653 } 1654 1655 1656 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1657 java_thread->address_field_put(_eetop_offset, (address)thread); 1658 } 1659 1660 1661 oop java_lang_Thread::name(oop java_thread) { 1662 return java_thread->obj_field(_name_offset); 1663 } 1664 1665 1666 void java_lang_Thread::set_name(oop java_thread, oop name) { 1667 java_thread->obj_field_put(_name_offset, name); 1668 } 1669 1670 1671 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1672 return (ThreadPriority)java_thread->int_field(_priority_offset); 1673 } 1674 1675 1676 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1677 java_thread->int_field_put(_priority_offset, priority); 1678 } 1679 1680 1681 oop java_lang_Thread::threadGroup(oop java_thread) { 1682 return java_thread->obj_field(_group_offset); 1683 } 1684 1685 1686 bool java_lang_Thread::is_stillborn(oop java_thread) { 1687 return java_thread->bool_field(_stillborn_offset) != 0; 1688 } 1689 1690 1691 // We never have reason to turn the stillborn bit off 1692 void java_lang_Thread::set_stillborn(oop java_thread) { 1693 java_thread->bool_field_put(_stillborn_offset, true); 1694 } 1695 1696 1697 bool java_lang_Thread::is_alive(oop java_thread) { 1698 JavaThread* thr = java_lang_Thread::thread(java_thread); 1699 return (thr != NULL); 1700 } 1701 1702 1703 bool java_lang_Thread::is_daemon(oop java_thread) { 1704 return java_thread->bool_field(_daemon_offset) != 0; 1705 } 1706 1707 1708 void java_lang_Thread::set_daemon(oop java_thread) { 1709 java_thread->bool_field_put(_daemon_offset, true); 1710 } 1711 1712 oop java_lang_Thread::context_class_loader(oop java_thread) { 1713 return java_thread->obj_field(_contextClassLoader_offset); 1714 } 1715 1716 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1717 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1718 } 1719 1720 1721 jlong java_lang_Thread::stackSize(oop java_thread) { 1722 return java_thread->long_field(_stackSize_offset); 1723 } 1724 1725 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1726 void java_lang_Thread::set_thread_status(oop java_thread, 1727 java_lang_Thread::ThreadStatus status) { 1728 java_thread->int_field_put(_thread_status_offset, status); 1729 } 1730 1731 // Read thread status value from threadStatus field in java.lang.Thread java class. 1732 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1733 // Make sure the caller is operating on behalf of the VM or is 1734 // running VM code (state == _thread_in_vm). 1735 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1736 JavaThread::current()->thread_state() == _thread_in_vm, 1737 "Java Thread is not running in vm"); 1738 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1739 } 1740 1741 1742 jlong java_lang_Thread::thread_id(oop java_thread) { 1743 return java_thread->long_field(_tid_offset); 1744 } 1745 1746 oop java_lang_Thread::park_blocker(oop java_thread) { 1747 return java_thread->obj_field(_park_blocker_offset); 1748 } 1749 1750 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1751 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1752 switch (status) { 1753 case NEW : return "NEW"; 1754 case RUNNABLE : return "RUNNABLE"; 1755 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1756 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1757 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1758 case PARKED : return "WAITING (parking)"; 1759 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1760 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1761 case TERMINATED : return "TERMINATED"; 1762 default : return "UNKNOWN"; 1763 }; 1764 } 1765 int java_lang_ThreadGroup::_parent_offset = 0; 1766 int java_lang_ThreadGroup::_name_offset = 0; 1767 int java_lang_ThreadGroup::_threads_offset = 0; 1768 int java_lang_ThreadGroup::_groups_offset = 0; 1769 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1770 int java_lang_ThreadGroup::_destroyed_offset = 0; 1771 int java_lang_ThreadGroup::_daemon_offset = 0; 1772 int java_lang_ThreadGroup::_nthreads_offset = 0; 1773 int java_lang_ThreadGroup::_ngroups_offset = 0; 1774 1775 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1776 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1777 return java_thread_group->obj_field(_parent_offset); 1778 } 1779 1780 // ("name as oop" accessor is not necessary) 1781 1782 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1783 oop name = java_thread_group->obj_field(_name_offset); 1784 // ThreadGroup.name can be null 1785 if (name != NULL) { 1786 return java_lang_String::as_utf8_string(name); 1787 } 1788 return NULL; 1789 } 1790 1791 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1792 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1793 return java_thread_group->int_field(_nthreads_offset); 1794 } 1795 1796 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1797 oop threads = java_thread_group->obj_field(_threads_offset); 1798 assert(threads != NULL, "threadgroups should have threads"); 1799 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1800 return objArrayOop(threads); 1801 } 1802 1803 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1804 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1805 return java_thread_group->int_field(_ngroups_offset); 1806 } 1807 1808 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1809 oop groups = java_thread_group->obj_field(_groups_offset); 1810 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1811 return objArrayOop(groups); 1812 } 1813 1814 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1815 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1816 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1817 } 1818 1819 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1820 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1821 return java_thread_group->bool_field(_destroyed_offset) != 0; 1822 } 1823 1824 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1825 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1826 return java_thread_group->bool_field(_daemon_offset) != 0; 1827 } 1828 1829 #define THREADGROUP_FIELDS_DO(macro) \ 1830 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1831 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1832 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1833 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1834 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1835 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1836 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1837 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1838 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1839 1840 void java_lang_ThreadGroup::compute_offsets() { 1841 assert(_parent_offset == 0, "offsets should be initialized only once"); 1842 1843 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1844 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1845 } 1846 1847 #if INCLUDE_CDS 1848 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1849 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1850 } 1851 #endif 1852 1853 #define THROWABLE_FIELDS_DO(macro) \ 1854 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1855 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1856 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1857 macro(depth_offset, k, "depth", int_signature, false); \ 1858 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1859 1860 void java_lang_Throwable::compute_offsets() { 1861 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1862 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1863 } 1864 1865 #if INCLUDE_CDS 1866 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1867 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1868 } 1869 #endif 1870 1871 oop java_lang_Throwable::unassigned_stacktrace() { 1872 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1873 oop base = ik->static_field_base_raw(); 1874 return base->obj_field(static_unassigned_stacktrace_offset); 1875 } 1876 1877 oop java_lang_Throwable::backtrace(oop throwable) { 1878 return throwable->obj_field_acquire(backtrace_offset); 1879 } 1880 1881 1882 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1883 throwable->release_obj_field_put(backtrace_offset, value); 1884 } 1885 1886 int java_lang_Throwable::depth(oop throwable) { 1887 return throwable->int_field(depth_offset); 1888 } 1889 1890 void java_lang_Throwable::set_depth(oop throwable, int value) { 1891 throwable->int_field_put(depth_offset, value); 1892 } 1893 1894 oop java_lang_Throwable::message(oop throwable) { 1895 return throwable->obj_field(detailMessage_offset); 1896 } 1897 1898 1899 // Return Symbol for detailed_message or NULL 1900 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1901 PRESERVE_EXCEPTION_MARK; // Keep original exception 1902 oop detailed_message = java_lang_Throwable::message(throwable); 1903 if (detailed_message != NULL) { 1904 return java_lang_String::as_symbol(detailed_message); 1905 } 1906 return NULL; 1907 } 1908 1909 void java_lang_Throwable::set_message(oop throwable, oop value) { 1910 throwable->obj_field_put(detailMessage_offset, value); 1911 } 1912 1913 1914 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1915 throwable->obj_field_put(stackTrace_offset, st_element_array); 1916 } 1917 1918 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1919 set_stacktrace(throwable, NULL); 1920 } 1921 1922 1923 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1924 ResourceMark rm; 1925 Klass* k = throwable->klass(); 1926 assert(k != NULL, "just checking"); 1927 st->print("%s", k->external_name()); 1928 oop msg = message(throwable); 1929 if (msg != NULL) { 1930 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1931 } 1932 } 1933 1934 // After this many redefines, the stack trace is unreliable. 1935 const int MAX_VERSION = USHRT_MAX; 1936 1937 static inline bool version_matches(Method* method, int version) { 1938 assert(version < MAX_VERSION, "version is too big"); 1939 return method != NULL && (method->constants()->version() == version); 1940 } 1941 1942 // This class provides a simple wrapper over the internal structure of 1943 // exception backtrace to insulate users of the backtrace from needing 1944 // to know what it looks like. 1945 class BacktraceBuilder: public StackObj { 1946 friend class BacktraceIterator; 1947 private: 1948 Handle _backtrace; 1949 objArrayOop _head; 1950 typeArrayOop _methods; 1951 typeArrayOop _bcis; 1952 objArrayOop _mirrors; 1953 typeArrayOop _names; // Needed to insulate method name against redefinition. 1954 // This is set to a java.lang.Boolean(true) if the top frame 1955 // of the backtrace is omitted because it shall be hidden. 1956 // Else it is null. 1957 oop _has_hidden_top_frame; 1958 int _index; 1959 NoSafepointVerifier _nsv; 1960 1961 enum { 1962 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1963 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1964 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1965 trace_names_offset = java_lang_Throwable::trace_names_offset, 1966 trace_next_offset = java_lang_Throwable::trace_next_offset, 1967 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 1968 trace_size = java_lang_Throwable::trace_size, 1969 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1970 }; 1971 1972 // get info out of chunks 1973 static typeArrayOop get_methods(objArrayHandle chunk) { 1974 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1975 assert(methods != NULL, "method array should be initialized in backtrace"); 1976 return methods; 1977 } 1978 static typeArrayOop get_bcis(objArrayHandle chunk) { 1979 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1980 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1981 return bcis; 1982 } 1983 static objArrayOop get_mirrors(objArrayHandle chunk) { 1984 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1985 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1986 return mirrors; 1987 } 1988 static typeArrayOop get_names(objArrayHandle chunk) { 1989 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1990 assert(names != NULL, "names array should be initialized in backtrace"); 1991 return names; 1992 } 1993 static oop get_has_hidden_top_frame(objArrayHandle chunk) { 1994 oop hidden = chunk->obj_at(trace_hidden_offset); 1995 return hidden; 1996 } 1997 1998 public: 1999 2000 // constructor for new backtrace 2001 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) { 2002 expand(CHECK); 2003 _backtrace = Handle(THREAD, _head); 2004 _index = 0; 2005 } 2006 2007 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2008 _methods = get_methods(backtrace); 2009 _bcis = get_bcis(backtrace); 2010 _mirrors = get_mirrors(backtrace); 2011 _names = get_names(backtrace); 2012 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace); 2013 assert(_methods->length() == _bcis->length() && 2014 _methods->length() == _mirrors->length() && 2015 _mirrors->length() == _names->length(), 2016 "method and source information arrays should match"); 2017 2018 // head is the preallocated backtrace 2019 _head = backtrace(); 2020 _backtrace = Handle(thread, _head); 2021 _index = 0; 2022 } 2023 2024 void expand(TRAPS) { 2025 objArrayHandle old_head(THREAD, _head); 2026 PauseNoSafepointVerifier pnsv(&_nsv); 2027 2028 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2029 objArrayHandle new_head(THREAD, head); 2030 2031 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2032 typeArrayHandle new_methods(THREAD, methods); 2033 2034 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2035 typeArrayHandle new_bcis(THREAD, bcis); 2036 2037 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2038 objArrayHandle new_mirrors(THREAD, mirrors); 2039 2040 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2041 typeArrayHandle new_names(THREAD, names); 2042 2043 if (!old_head.is_null()) { 2044 old_head->obj_at_put(trace_next_offset, new_head()); 2045 } 2046 new_head->obj_at_put(trace_methods_offset, new_methods()); 2047 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2048 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2049 new_head->obj_at_put(trace_names_offset, new_names()); 2050 new_head->obj_at_put(trace_hidden_offset, NULL); 2051 2052 _head = new_head(); 2053 _methods = new_methods(); 2054 _bcis = new_bcis(); 2055 _mirrors = new_mirrors(); 2056 _names = new_names(); 2057 _index = 0; 2058 } 2059 2060 oop backtrace() { 2061 return _backtrace(); 2062 } 2063 2064 inline void push(Method* method, int bci, TRAPS) { 2065 // Smear the -1 bci to 0 since the array only holds unsigned 2066 // shorts. The later line number lookup would just smear the -1 2067 // to a 0 even if it could be recorded. 2068 if (bci == SynchronizationEntryBCI) bci = 0; 2069 2070 if (_index >= trace_chunk_size) { 2071 methodHandle mhandle(THREAD, method); 2072 expand(CHECK); 2073 method = mhandle(); 2074 } 2075 2076 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2077 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2078 2079 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2080 // klass owning the symbols alive so their refcounts aren't decremented. 2081 Symbol* name = method->name(); 2082 _names->symbol_at_put(_index, name); 2083 2084 // We need to save the mirrors in the backtrace to keep the class 2085 // from being unloaded while we still have this stack trace. 2086 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2087 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2088 _index++; 2089 } 2090 2091 void set_has_hidden_top_frame(TRAPS) { 2092 if (_has_hidden_top_frame == NULL) { 2093 jvalue prim; 2094 prim.z = 1; 2095 PauseNoSafepointVerifier pnsv(&_nsv); 2096 _has_hidden_top_frame = java_lang_boxing_object::create(T_BOOLEAN, &prim, CHECK); 2097 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame); 2098 } 2099 } 2100 2101 }; 2102 2103 struct BacktraceElement : public StackObj { 2104 int _method_id; 2105 int _bci; 2106 int _version; 2107 Symbol* _name; 2108 Handle _mirror; 2109 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2110 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2111 }; 2112 2113 class BacktraceIterator : public StackObj { 2114 int _index; 2115 objArrayHandle _result; 2116 objArrayHandle _mirrors; 2117 typeArrayHandle _methods; 2118 typeArrayHandle _bcis; 2119 typeArrayHandle _names; 2120 2121 void init(objArrayHandle result, Thread* thread) { 2122 // Get method id, bci, version and mirror from chunk 2123 _result = result; 2124 if (_result.not_null()) { 2125 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2126 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2127 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2128 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2129 _index = 0; 2130 } 2131 } 2132 public: 2133 BacktraceIterator(objArrayHandle result, Thread* thread) { 2134 init(result, thread); 2135 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2136 } 2137 2138 BacktraceElement next(Thread* thread) { 2139 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2140 _methods->ushort_at(_index), 2141 Backtrace::version_at(_bcis->int_at(_index)), 2142 Backtrace::bci_at(_bcis->int_at(_index)), 2143 _names->symbol_at(_index)); 2144 _index++; 2145 2146 if (_index >= java_lang_Throwable::trace_chunk_size) { 2147 int next_offset = java_lang_Throwable::trace_next_offset; 2148 // Get next chunk 2149 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2150 init(result, thread); 2151 } 2152 return e; 2153 } 2154 2155 bool repeat() { 2156 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2157 } 2158 }; 2159 2160 2161 // Print stack trace element to resource allocated buffer 2162 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2163 int version, int bci, Symbol* name) { 2164 ResourceMark rm; 2165 2166 // Get strings and string lengths 2167 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2168 const char* klass_name = holder->external_name(); 2169 int buf_len = (int)strlen(klass_name); 2170 2171 char* method_name = name->as_C_string(); 2172 buf_len += (int)strlen(method_name); 2173 2174 char* source_file_name = NULL; 2175 Symbol* source = Backtrace::get_source_file_name(holder, version); 2176 if (source != NULL) { 2177 source_file_name = source->as_C_string(); 2178 buf_len += (int)strlen(source_file_name); 2179 } 2180 2181 char *module_name = NULL, *module_version = NULL; 2182 ModuleEntry* module = holder->module(); 2183 if (module->is_named()) { 2184 module_name = module->name()->as_C_string(); 2185 buf_len += (int)strlen(module_name); 2186 if (module->version() != NULL) { 2187 module_version = module->version()->as_C_string(); 2188 buf_len += (int)strlen(module_version); 2189 } 2190 } 2191 2192 // Allocate temporary buffer with extra space for formatting and line number 2193 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2194 2195 // Print stack trace line in buffer 2196 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2197 2198 // Print module information 2199 if (module_name != NULL) { 2200 if (module_version != NULL) { 2201 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2202 } else { 2203 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2204 } 2205 } 2206 2207 // The method can be NULL if the requested class version is gone 2208 Method* method = holder->method_with_orig_idnum(method_id, version); 2209 if (!version_matches(method, version)) { 2210 strcat(buf, "Redefined)"); 2211 } else { 2212 int line_number = Backtrace::get_line_number(method, bci); 2213 if (line_number == -2) { 2214 strcat(buf, "Native Method)"); 2215 } else { 2216 if (source_file_name != NULL && (line_number != -1)) { 2217 // Sourcename and linenumber 2218 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2219 } else if (source_file_name != NULL) { 2220 // Just sourcename 2221 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2222 } else { 2223 // Neither sourcename nor linenumber 2224 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2225 } 2226 CompiledMethod* nm = method->code(); 2227 if (WizardMode && nm != NULL) { 2228 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2229 } 2230 } 2231 } 2232 2233 st->print_cr("%s", buf); 2234 } 2235 2236 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2237 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2238 int method_id = method->orig_method_idnum(); 2239 int version = method->constants()->version(); 2240 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2241 } 2242 2243 /** 2244 * Print the throwable message and its stack trace plus all causes by walking the 2245 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2246 */ 2247 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2248 // First, print the message. 2249 print(throwable(), st); 2250 st->cr(); 2251 2252 // Now print the stack trace. 2253 Thread* THREAD = Thread::current(); 2254 while (throwable.not_null()) { 2255 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2256 if (result.is_null()) { 2257 st->print_raw_cr("\t<<no stack trace available>>"); 2258 return; 2259 } 2260 BacktraceIterator iter(result, THREAD); 2261 2262 while (iter.repeat()) { 2263 BacktraceElement bte = iter.next(THREAD); 2264 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2265 } 2266 { 2267 // Call getCause() which doesn't necessarily return the _cause field. 2268 EXCEPTION_MARK; 2269 JavaValue cause(T_OBJECT); 2270 JavaCalls::call_virtual(&cause, 2271 throwable, 2272 throwable->klass(), 2273 vmSymbols::getCause_name(), 2274 vmSymbols::void_throwable_signature(), 2275 THREAD); 2276 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2277 if (HAS_PENDING_EXCEPTION) { 2278 CLEAR_PENDING_EXCEPTION; 2279 throwable = Handle(); 2280 } else { 2281 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2282 if (throwable.not_null()) { 2283 st->print("Caused by: "); 2284 print(throwable(), st); 2285 st->cr(); 2286 } 2287 } 2288 } 2289 } 2290 } 2291 2292 /** 2293 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2294 */ 2295 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2296 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2297 JavaValue result(T_VOID); 2298 JavaCalls::call_virtual(&result, 2299 throwable, 2300 SystemDictionary::Throwable_klass(), 2301 vmSymbols::printStackTrace_name(), 2302 vmSymbols::void_method_signature(), 2303 THREAD); 2304 } 2305 2306 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2307 if (!StackTraceInThrowable) return; 2308 ResourceMark rm(THREAD); 2309 2310 // Start out by clearing the backtrace for this object, in case the VM 2311 // runs out of memory while allocating the stack trace 2312 set_backtrace(throwable(), NULL); 2313 // Clear lazily constructed Java level stacktrace if refilling occurs 2314 // This is unnecessary in 1.7+ but harmless 2315 clear_stacktrace(throwable()); 2316 2317 int max_depth = MaxJavaStackTraceDepth; 2318 JavaThread* thread = (JavaThread*)THREAD; 2319 2320 BacktraceBuilder bt(CHECK); 2321 2322 // If there is no Java frame just return the method that was being called 2323 // with bci 0 2324 if (!thread->has_last_Java_frame()) { 2325 if (max_depth >= 1 && method() != NULL) { 2326 bt.push(method(), 0, CHECK); 2327 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2328 set_depth(throwable(), 1); 2329 set_backtrace(throwable(), bt.backtrace()); 2330 } 2331 return; 2332 } 2333 2334 // Instead of using vframe directly, this version of fill_in_stack_trace 2335 // basically handles everything by hand. This significantly improved the 2336 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2337 // See bug 6333838 for more details. 2338 // The "ASSERT" here is to verify this method generates the exactly same stack 2339 // trace as utilizing vframe. 2340 #ifdef ASSERT 2341 vframeStream st(thread); 2342 methodHandle st_method(THREAD, st.method()); 2343 #endif 2344 int total_count = 0; 2345 RegisterMap map(thread, false); 2346 int decode_offset = 0; 2347 CompiledMethod* nm = NULL; 2348 bool skip_fillInStackTrace_check = false; 2349 bool skip_throwableInit_check = false; 2350 bool skip_hidden = !ShowHiddenFrames; 2351 2352 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2353 Method* method = NULL; 2354 int bci = 0; 2355 2356 // Compiled java method case. 2357 if (decode_offset != 0) { 2358 DebugInfoReadStream stream(nm, decode_offset); 2359 decode_offset = stream.read_int(); 2360 method = (Method*)nm->metadata_at(stream.read_int()); 2361 bci = stream.read_bci(); 2362 } else { 2363 if (fr.is_first_frame()) break; 2364 address pc = fr.pc(); 2365 if (fr.is_interpreted_frame()) { 2366 address bcp = fr.interpreter_frame_bcp(); 2367 method = fr.interpreter_frame_method(); 2368 bci = method->bci_from(bcp); 2369 fr = fr.sender(&map); 2370 } else { 2371 CodeBlob* cb = fr.cb(); 2372 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2373 // but non nmethod 2374 fr = fr.sender(&map); 2375 if (cb == NULL || !cb->is_compiled()) { 2376 continue; 2377 } 2378 nm = cb->as_compiled_method(); 2379 if (nm->method()->is_native()) { 2380 method = nm->method(); 2381 bci = 0; 2382 } else { 2383 PcDesc* pd = nm->pc_desc_at(pc); 2384 decode_offset = pd->scope_decode_offset(); 2385 // if decode_offset is not equal to 0, it will execute the 2386 // "compiled java method case" at the beginning of the loop. 2387 continue; 2388 } 2389 } 2390 } 2391 #ifdef ASSERT 2392 assert(st_method() == method && st.bci() == bci, 2393 "Wrong stack trace"); 2394 st.next(); 2395 // vframeStream::method isn't GC-safe so store off a copy 2396 // of the Method* in case we GC. 2397 if (!st.at_end()) { 2398 st_method = st.method(); 2399 } 2400 #endif 2401 2402 // the format of the stacktrace will be: 2403 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2404 // - 0 or more <init> methods for the exception class (skipped) 2405 // - rest of the stack 2406 2407 if (!skip_fillInStackTrace_check) { 2408 if (method->name() == vmSymbols::fillInStackTrace_name() && 2409 throwable->is_a(method->method_holder())) { 2410 continue; 2411 } 2412 else { 2413 skip_fillInStackTrace_check = true; // gone past them all 2414 } 2415 } 2416 if (!skip_throwableInit_check) { 2417 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2418 2419 // skip <init> methods of the exception class and superclasses 2420 // This is simlar to classic VM. 2421 if (method->name() == vmSymbols::object_initializer_name() && 2422 throwable->is_a(method->method_holder())) { 2423 continue; 2424 } else { 2425 // there are none or we've seen them all - either way stop checking 2426 skip_throwableInit_check = true; 2427 } 2428 } 2429 if (method->is_hidden()) { 2430 if (skip_hidden) { 2431 if (total_count == 0) { 2432 // The top frame will be hidden from the stack trace. 2433 bt.set_has_hidden_top_frame(CHECK); 2434 } 2435 continue; 2436 } 2437 } 2438 bt.push(method, bci, CHECK); 2439 total_count++; 2440 } 2441 2442 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2443 2444 // Put completed stack trace into throwable object 2445 set_backtrace(throwable(), bt.backtrace()); 2446 set_depth(throwable(), total_count); 2447 } 2448 2449 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2450 // No-op if stack trace is disabled 2451 if (!StackTraceInThrowable) { 2452 return; 2453 } 2454 2455 // Disable stack traces for some preallocated out of memory errors 2456 if (!Universe::should_fill_in_stack_trace(throwable)) { 2457 return; 2458 } 2459 2460 PRESERVE_EXCEPTION_MARK; 2461 2462 JavaThread* thread = JavaThread::active(); 2463 fill_in_stack_trace(throwable, method, thread); 2464 // ignore exceptions thrown during stack trace filling 2465 CLEAR_PENDING_EXCEPTION; 2466 } 2467 2468 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2469 // Allocate stack trace - backtrace is created but not filled in 2470 2471 // No-op if stack trace is disabled 2472 if (!StackTraceInThrowable) return; 2473 BacktraceBuilder bt(CHECK); // creates a backtrace 2474 set_backtrace(throwable(), bt.backtrace()); 2475 } 2476 2477 2478 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2479 // Fill in stack trace into preallocated backtrace (no GC) 2480 2481 // No-op if stack trace is disabled 2482 if (!StackTraceInThrowable) return; 2483 2484 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2485 2486 JavaThread* THREAD = JavaThread::current(); 2487 2488 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2489 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2490 2491 ResourceMark rm(THREAD); 2492 vframeStream st(THREAD); 2493 2494 BacktraceBuilder bt(THREAD, backtrace); 2495 2496 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2497 // methods as preallocated errors aren't created by "java" code. 2498 2499 // fill in as much stack trace as possible 2500 int chunk_count = 0; 2501 for (;!st.at_end(); st.next()) { 2502 bt.push(st.method(), st.bci(), CHECK); 2503 chunk_count++; 2504 2505 // Bail-out for deep stacks 2506 if (chunk_count >= trace_chunk_size) break; 2507 } 2508 set_depth(throwable(), chunk_count); 2509 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2510 2511 // We support the Throwable immutability protocol defined for Java 7. 2512 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2513 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2514 } 2515 2516 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2517 objArrayHandle stack_trace_array_h, TRAPS) { 2518 2519 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2520 THROW(vmSymbols::java_lang_NullPointerException()); 2521 } 2522 2523 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2524 2525 if (stack_trace_array_h->length() != depth(throwable())) { 2526 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2527 } 2528 2529 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2530 BacktraceIterator iter(result, THREAD); 2531 2532 int index = 0; 2533 while (iter.repeat()) { 2534 BacktraceElement bte = iter.next(THREAD); 2535 2536 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2537 2538 if (stack_trace_element.is_null()) { 2539 THROW(vmSymbols::java_lang_NullPointerException()); 2540 } 2541 2542 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2543 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2544 2545 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2546 method, 2547 bte._version, 2548 bte._bci, 2549 bte._name, CHECK); 2550 } 2551 } 2552 2553 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2554 Thread* THREAD = Thread::current(); 2555 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable))); 2556 BacktraceIterator iter(result, THREAD); 2557 // No backtrace available. 2558 if (!iter.repeat()) return false; 2559 2560 // If the exception happened in a frame that has been hidden, i.e., 2561 // omitted from the back trace, we can not compute the message. 2562 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2563 if (hidden != NULL) { 2564 return false; 2565 } 2566 2567 // Get first backtrace element. 2568 BacktraceElement bte = iter.next(THREAD); 2569 2570 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2571 assert(holder != NULL, "first element should be non-null"); 2572 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2573 2574 // Original version is no longer available. 2575 if (m == NULL || !version_matches(m, bte._version)) { 2576 return false; 2577 } 2578 2579 *method = m; 2580 *bci = bte._bci; 2581 return true; 2582 } 2583 2584 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2585 // Allocate java.lang.StackTraceElement instance 2586 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2587 assert(k != NULL, "must be loaded in 1.4+"); 2588 if (k->should_be_initialized()) { 2589 k->initialize(CHECK_0); 2590 } 2591 2592 Handle element = k->allocate_instance_handle(CHECK_0); 2593 2594 int version = method->constants()->version(); 2595 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2596 return element(); 2597 } 2598 2599 void java_lang_StackTraceElement::fill_in(Handle element, 2600 InstanceKlass* holder, const methodHandle& method, 2601 int version, int bci, Symbol* name, TRAPS) { 2602 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2603 2604 ResourceMark rm(THREAD); 2605 HandleMark hm(THREAD); 2606 2607 // Fill in class name 2608 Handle java_class(THREAD, holder->java_mirror()); 2609 oop classname = java_lang_Class::name(java_class, CHECK); 2610 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2611 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2612 2613 oop loader = holder->class_loader(); 2614 if (loader != NULL) { 2615 oop loader_name = java_lang_ClassLoader::name(loader); 2616 if (loader_name != NULL) 2617 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2618 } 2619 2620 // Fill in method name 2621 oop methodname = StringTable::intern(name, CHECK); 2622 java_lang_StackTraceElement::set_methodName(element(), methodname); 2623 2624 // Fill in module name and version 2625 ModuleEntry* module = holder->module(); 2626 if (module->is_named()) { 2627 oop module_name = StringTable::intern(module->name(), CHECK); 2628 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2629 oop module_version; 2630 if (module->version() != NULL) { 2631 module_version = StringTable::intern(module->version(), CHECK); 2632 } else { 2633 module_version = NULL; 2634 } 2635 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2636 } 2637 2638 if (method() == NULL || !version_matches(method(), version)) { 2639 // The method was redefined, accurate line number information isn't available 2640 java_lang_StackTraceElement::set_fileName(element(), NULL); 2641 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2642 } else { 2643 // Fill in source file name and line number. 2644 Symbol* source = Backtrace::get_source_file_name(holder, version); 2645 oop source_file = java_lang_Class::source_file(java_class()); 2646 if (source != NULL) { 2647 // Class was not redefined. We can trust its cache if set, 2648 // else we have to initialize it. 2649 if (source_file == NULL) { 2650 source_file = StringTable::intern(source, CHECK); 2651 java_lang_Class::set_source_file(java_class(), source_file); 2652 } 2653 } else { 2654 // Class was redefined. Dump the cache if it was set. 2655 if (source_file != NULL) { 2656 source_file = NULL; 2657 java_lang_Class::set_source_file(java_class(), source_file); 2658 } 2659 } 2660 java_lang_StackTraceElement::set_fileName(element(), source_file); 2661 2662 int line_number = Backtrace::get_line_number(method, bci); 2663 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2664 } 2665 } 2666 2667 #if INCLUDE_JVMCI 2668 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) { 2669 int method_id = method->orig_method_idnum(); 2670 int cpref = method->name_index(); 2671 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number); 2672 } 2673 2674 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) { 2675 // Fill in class name 2676 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2677 Method* method = holder->method_with_orig_idnum(method_id, version); 2678 2679 // The method can be NULL if the requested class version is gone 2680 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2681 2682 // Fill in method name 2683 methodname = sym; 2684 2685 if (!version_matches(method, version)) { 2686 // If the method was redefined, accurate line number information isn't available 2687 filename = NULL; 2688 line_number = -1; 2689 } else { 2690 // Fill in source file name and line number. 2691 // Use a specific ik version as a holder since the mirror might 2692 // refer to a version that is now obsolete and no longer accessible 2693 // via the previous versions list. 2694 holder = holder->get_klass_version(version); 2695 assert(holder != NULL, "sanity check"); 2696 filename = holder->source_file_name(); 2697 line_number = Backtrace::get_line_number(method, bci); 2698 } 2699 } 2700 #endif // INCLUDE_JVMCI 2701 2702 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2703 HandleMark hm(THREAD); 2704 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2705 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2706 // we should expand MemberName::name when Throwable uses StackTrace 2707 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2708 return method; 2709 } 2710 2711 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2712 // set Method* or mid/cpref 2713 HandleMark hm(THREAD); 2714 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2715 InstanceKlass* ik = method->method_holder(); 2716 CallInfo info(method(), ik, CHECK); 2717 MethodHandles::init_method_MemberName(mname, info); 2718 // set bci 2719 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2720 // method may be redefined; store the version 2721 int version = method->constants()->version(); 2722 assert((jushort)version == version, "version should be short"); 2723 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2724 } 2725 2726 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2727 ResourceMark rm(THREAD); 2728 HandleMark hm(THREAD); 2729 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2730 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2731 InstanceKlass* holder = InstanceKlass::cast(clazz); 2732 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2733 2734 short version = stackFrame->short_field(_version_offset); 2735 int bci = stackFrame->int_field(_bci_offset); 2736 Symbol* name = method->name(); 2737 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2738 } 2739 2740 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2741 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2742 macro(_bci_offset, k, "bci", int_signature, false) 2743 2744 void java_lang_StackFrameInfo::compute_offsets() { 2745 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2746 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2747 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2748 } 2749 2750 #if INCLUDE_CDS 2751 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2752 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2753 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2754 } 2755 #endif 2756 2757 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2758 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2759 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2760 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2761 macro(_mode_offset, k, "mode", int_signature, false) 2762 2763 void java_lang_LiveStackFrameInfo::compute_offsets() { 2764 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2765 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2766 } 2767 2768 #if INCLUDE_CDS 2769 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2770 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2771 } 2772 #endif 2773 2774 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2775 macro(override_offset, k, "override", bool_signature, false) 2776 2777 void java_lang_reflect_AccessibleObject::compute_offsets() { 2778 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2779 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2780 } 2781 2782 #if INCLUDE_CDS 2783 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2784 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2785 } 2786 #endif 2787 2788 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 return (jboolean) reflect->bool_field(override_offset); 2791 } 2792 2793 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 reflect->bool_field_put(override_offset, (int) value); 2796 } 2797 2798 #define METHOD_FIELDS_DO(macro) \ 2799 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2800 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2801 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2802 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2803 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2804 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2805 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2806 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2807 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2808 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2809 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2810 2811 void java_lang_reflect_Method::compute_offsets() { 2812 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2813 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2814 } 2815 2816 #if INCLUDE_CDS 2817 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2818 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2819 } 2820 #endif 2821 2822 Handle java_lang_reflect_Method::create(TRAPS) { 2823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2824 Klass* klass = SystemDictionary::reflect_Method_klass(); 2825 // This class is eagerly initialized during VM initialization, since we keep a refence 2826 // to one of the methods 2827 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2828 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2829 } 2830 2831 oop java_lang_reflect_Method::clazz(oop reflect) { 2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2833 return reflect->obj_field(clazz_offset); 2834 } 2835 2836 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2838 reflect->obj_field_put(clazz_offset, value); 2839 } 2840 2841 int java_lang_reflect_Method::slot(oop reflect) { 2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2843 return reflect->int_field(slot_offset); 2844 } 2845 2846 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2848 reflect->int_field_put(slot_offset, value); 2849 } 2850 2851 void java_lang_reflect_Method::set_name(oop method, oop value) { 2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2853 method->obj_field_put(name_offset, value); 2854 } 2855 2856 oop java_lang_reflect_Method::return_type(oop method) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 return method->obj_field(returnType_offset); 2859 } 2860 2861 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2863 method->obj_field_put(returnType_offset, value); 2864 } 2865 2866 oop java_lang_reflect_Method::parameter_types(oop method) { 2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2868 return method->obj_field(parameterTypes_offset); 2869 } 2870 2871 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2873 method->obj_field_put(parameterTypes_offset, value); 2874 } 2875 2876 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 method->obj_field_put(exceptionTypes_offset, value); 2879 } 2880 2881 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2882 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2883 method->int_field_put(modifiers_offset, value); 2884 } 2885 2886 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2888 method->obj_field_put(signature_offset, value); 2889 } 2890 2891 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2892 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2893 method->obj_field_put(annotations_offset, value); 2894 } 2895 2896 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2898 method->obj_field_put(parameter_annotations_offset, value); 2899 } 2900 2901 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2903 method->obj_field_put(annotation_default_offset, value); 2904 } 2905 2906 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2907 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2908 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2909 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2910 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2911 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2912 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2913 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2914 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2915 2916 void java_lang_reflect_Constructor::compute_offsets() { 2917 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2918 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2919 } 2920 2921 #if INCLUDE_CDS 2922 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2923 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2924 } 2925 #endif 2926 2927 Handle java_lang_reflect_Constructor::create(TRAPS) { 2928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2929 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2930 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2931 InstanceKlass* ik = InstanceKlass::cast(k); 2932 // Ensure it is initialized 2933 ik->initialize(CHECK_NH); 2934 return ik->allocate_instance_handle(THREAD); 2935 } 2936 2937 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2938 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2939 return reflect->obj_field(clazz_offset); 2940 } 2941 2942 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2943 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2944 reflect->obj_field_put(clazz_offset, value); 2945 } 2946 2947 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2949 return constructor->obj_field(parameterTypes_offset); 2950 } 2951 2952 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2953 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2954 constructor->obj_field_put(parameterTypes_offset, value); 2955 } 2956 2957 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2959 constructor->obj_field_put(exceptionTypes_offset, value); 2960 } 2961 2962 int java_lang_reflect_Constructor::slot(oop reflect) { 2963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2964 return reflect->int_field(slot_offset); 2965 } 2966 2967 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2969 reflect->int_field_put(slot_offset, value); 2970 } 2971 2972 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2974 constructor->int_field_put(modifiers_offset, value); 2975 } 2976 2977 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2979 constructor->obj_field_put(signature_offset, value); 2980 } 2981 2982 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2984 constructor->obj_field_put(annotations_offset, value); 2985 } 2986 2987 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2989 method->obj_field_put(parameter_annotations_offset, value); 2990 } 2991 2992 #define FIELD_FIELDS_DO(macro) \ 2993 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2994 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2995 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2996 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2997 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2998 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2999 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3000 3001 void java_lang_reflect_Field::compute_offsets() { 3002 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3003 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3004 } 3005 3006 #if INCLUDE_CDS 3007 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3008 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3009 } 3010 #endif 3011 3012 Handle java_lang_reflect_Field::create(TRAPS) { 3013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3014 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3015 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3016 InstanceKlass* ik = InstanceKlass::cast(k); 3017 // Ensure it is initialized 3018 ik->initialize(CHECK_NH); 3019 return ik->allocate_instance_handle(THREAD); 3020 } 3021 3022 oop java_lang_reflect_Field::clazz(oop reflect) { 3023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3024 return reflect->obj_field(clazz_offset); 3025 } 3026 3027 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3029 reflect->obj_field_put(clazz_offset, value); 3030 } 3031 3032 oop java_lang_reflect_Field::name(oop field) { 3033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3034 return field->obj_field(name_offset); 3035 } 3036 3037 void java_lang_reflect_Field::set_name(oop field, oop value) { 3038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3039 field->obj_field_put(name_offset, value); 3040 } 3041 3042 oop java_lang_reflect_Field::type(oop field) { 3043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3044 return field->obj_field(type_offset); 3045 } 3046 3047 void java_lang_reflect_Field::set_type(oop field, oop value) { 3048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3049 field->obj_field_put(type_offset, value); 3050 } 3051 3052 int java_lang_reflect_Field::slot(oop reflect) { 3053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3054 return reflect->int_field(slot_offset); 3055 } 3056 3057 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3059 reflect->int_field_put(slot_offset, value); 3060 } 3061 3062 int java_lang_reflect_Field::modifiers(oop field) { 3063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3064 return field->int_field(modifiers_offset); 3065 } 3066 3067 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3069 field->int_field_put(modifiers_offset, value); 3070 } 3071 3072 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3074 field->obj_field_put(signature_offset, value); 3075 } 3076 3077 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3079 field->obj_field_put(annotations_offset, value); 3080 } 3081 3082 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3083 // Allocate java.lang.reflect.RecordComponent instance 3084 HandleMark hm(THREAD); 3085 InstanceKlass* ik = SystemDictionary::RecordComponent_klass(); 3086 assert(ik != NULL, "must be loaded"); 3087 if (ik->should_be_initialized()) { 3088 ik->initialize(CHECK_0); 3089 } 3090 3091 Handle element = ik->allocate_instance_handle(CHECK_0); 3092 3093 Handle decl_class(THREAD, holder->java_mirror()); 3094 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3095 3096 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3097 oop component_name = StringTable::intern(name, CHECK_0); 3098 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3099 3100 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3101 Handle component_type_h = 3102 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_0); 3103 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3104 3105 Method* accessor_method = NULL; 3106 { 3107 // Prepend "()" to type to create the full method signature. 3108 ResourceMark rm(THREAD); 3109 int sig_len = type->utf8_length() + 3; // "()" and null char 3110 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3111 jio_snprintf(sig, sig_len, "()%s", type->as_C_string()); 3112 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3113 accessor_method = holder->find_instance_method(name, full_sig); 3114 } 3115 3116 if (accessor_method != NULL) { 3117 methodHandle method(THREAD, accessor_method); 3118 oop m = Reflection::new_method(method, false, CHECK_0); 3119 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3120 } else { 3121 java_lang_reflect_RecordComponent::set_accessor(element(), NULL); 3122 } 3123 3124 int sig_index = component->generic_signature_index(); 3125 if (sig_index > 0) { 3126 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3127 oop component_sig = StringTable::intern(sig, CHECK_0); 3128 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3129 } else { 3130 java_lang_reflect_RecordComponent::set_signature(element(), NULL); 3131 } 3132 3133 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_0); 3134 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3135 3136 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_0); 3137 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3138 3139 return element(); 3140 } 3141 3142 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3143 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3144 3145 void reflect_ConstantPool::compute_offsets() { 3146 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3147 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3148 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3149 } 3150 3151 #if INCLUDE_CDS 3152 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3153 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3154 } 3155 #endif 3156 3157 #define PARAMETER_FIELDS_DO(macro) \ 3158 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3159 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3160 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3161 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3162 3163 void java_lang_reflect_Parameter::compute_offsets() { 3164 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3165 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3166 } 3167 3168 #if INCLUDE_CDS 3169 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3170 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3171 } 3172 #endif 3173 3174 Handle java_lang_reflect_Parameter::create(TRAPS) { 3175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3176 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3177 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3178 InstanceKlass* ik = InstanceKlass::cast(k); 3179 // Ensure it is initialized 3180 ik->initialize(CHECK_NH); 3181 return ik->allocate_instance_handle(THREAD); 3182 } 3183 3184 oop java_lang_reflect_Parameter::name(oop param) { 3185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3186 return param->obj_field(name_offset); 3187 } 3188 3189 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3191 param->obj_field_put(name_offset, value); 3192 } 3193 3194 int java_lang_reflect_Parameter::modifiers(oop param) { 3195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3196 return param->int_field(modifiers_offset); 3197 } 3198 3199 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3201 param->int_field_put(modifiers_offset, value); 3202 } 3203 3204 int java_lang_reflect_Parameter::index(oop param) { 3205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3206 return param->int_field(index_offset); 3207 } 3208 3209 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3211 param->int_field_put(index_offset, value); 3212 } 3213 3214 oop java_lang_reflect_Parameter::executable(oop param) { 3215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3216 return param->obj_field(executable_offset); 3217 } 3218 3219 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3221 param->obj_field_put(executable_offset, value); 3222 } 3223 3224 3225 int java_lang_Module::loader_offset; 3226 int java_lang_Module::name_offset; 3227 int java_lang_Module::_module_entry_offset = -1; 3228 3229 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3231 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3232 vmSymbols::java_lang_module_init_signature(), 3233 loader, module_name, CHECK_NH); 3234 } 3235 3236 #define MODULE_FIELDS_DO(macro) \ 3237 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3238 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3239 3240 void java_lang_Module::compute_offsets() { 3241 InstanceKlass* k = SystemDictionary::Module_klass(); 3242 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3243 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3244 } 3245 3246 #if INCLUDE_CDS 3247 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3248 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3249 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3250 } 3251 #endif 3252 3253 oop java_lang_Module::loader(oop module) { 3254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3255 return module->obj_field(loader_offset); 3256 } 3257 3258 void java_lang_Module::set_loader(oop module, oop value) { 3259 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3260 module->obj_field_put(loader_offset, value); 3261 } 3262 3263 oop java_lang_Module::name(oop module) { 3264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3265 return module->obj_field(name_offset); 3266 } 3267 3268 void java_lang_Module::set_name(oop module, oop value) { 3269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3270 module->obj_field_put(name_offset, value); 3271 } 3272 3273 ModuleEntry* java_lang_Module::module_entry(oop module) { 3274 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3275 assert(module != NULL, "module can't be null"); 3276 assert(oopDesc::is_oop(module), "module must be oop"); 3277 3278 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3279 if (module_entry == NULL) { 3280 // If the inject field containing the ModuleEntry* is null then return the 3281 // class loader's unnamed module. 3282 oop loader = java_lang_Module::loader(module); 3283 Handle h_loader = Handle(Thread::current(), loader); 3284 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3285 return loader_cld->unnamed_module(); 3286 } 3287 return module_entry; 3288 } 3289 3290 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3291 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3292 assert(module != NULL, "module can't be null"); 3293 assert(oopDesc::is_oop(module), "module must be oop"); 3294 module->address_field_put(_module_entry_offset, (address)module_entry); 3295 } 3296 3297 Handle reflect_ConstantPool::create(TRAPS) { 3298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3299 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3300 // Ensure it is initialized 3301 k->initialize(CHECK_NH); 3302 return k->allocate_instance_handle(THREAD); 3303 } 3304 3305 3306 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3308 oop mirror = value->pool_holder()->java_mirror(); 3309 // Save the mirror to get back the constant pool. 3310 reflect->obj_field_put(_oop_offset, mirror); 3311 } 3312 3313 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3315 3316 oop mirror = reflect->obj_field(_oop_offset); 3317 Klass* k = java_lang_Class::as_Klass(mirror); 3318 assert(k->is_instance_klass(), "Must be"); 3319 3320 // Get the constant pool back from the klass. Since class redefinition 3321 // merges the new constant pool into the old, this is essentially the 3322 // same constant pool as the original. If constant pool merging is 3323 // no longer done in the future, this will have to change to save 3324 // the original. 3325 return InstanceKlass::cast(k)->constants(); 3326 } 3327 3328 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3329 macro(_base_offset, k, "base", object_signature, false) 3330 3331 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3332 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3333 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3334 } 3335 3336 #if INCLUDE_CDS 3337 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3338 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3339 } 3340 #endif 3341 3342 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3343 Klass* k = SystemDictionary::box_klass(type); 3344 if (k == NULL) return NULL; 3345 InstanceKlass* ik = InstanceKlass::cast(k); 3346 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3347 return ik->allocate_instance(THREAD); 3348 } 3349 3350 3351 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3352 oop box = initialize_and_allocate(type, CHECK_0); 3353 if (box == NULL) return NULL; 3354 switch (type) { 3355 case T_BOOLEAN: 3356 box->bool_field_put(value_offset, value->z); 3357 break; 3358 case T_CHAR: 3359 box->char_field_put(value_offset, value->c); 3360 break; 3361 case T_FLOAT: 3362 box->float_field_put(value_offset, value->f); 3363 break; 3364 case T_DOUBLE: 3365 box->double_field_put(long_value_offset, value->d); 3366 break; 3367 case T_BYTE: 3368 box->byte_field_put(value_offset, value->b); 3369 break; 3370 case T_SHORT: 3371 box->short_field_put(value_offset, value->s); 3372 break; 3373 case T_INT: 3374 box->int_field_put(value_offset, value->i); 3375 break; 3376 case T_LONG: 3377 box->long_field_put(long_value_offset, value->j); 3378 break; 3379 default: 3380 return NULL; 3381 } 3382 return box; 3383 } 3384 3385 3386 BasicType java_lang_boxing_object::basic_type(oop box) { 3387 if (box == NULL) return T_ILLEGAL; 3388 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3389 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3390 return T_ILLEGAL; 3391 return type; 3392 } 3393 3394 3395 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3396 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3397 switch (type) { 3398 case T_BOOLEAN: 3399 value->z = box->bool_field(value_offset); 3400 break; 3401 case T_CHAR: 3402 value->c = box->char_field(value_offset); 3403 break; 3404 case T_FLOAT: 3405 value->f = box->float_field(value_offset); 3406 break; 3407 case T_DOUBLE: 3408 value->d = box->double_field(long_value_offset); 3409 break; 3410 case T_BYTE: 3411 value->b = box->byte_field(value_offset); 3412 break; 3413 case T_SHORT: 3414 value->s = box->short_field(value_offset); 3415 break; 3416 case T_INT: 3417 value->i = box->int_field(value_offset); 3418 break; 3419 case T_LONG: 3420 value->j = box->long_field(long_value_offset); 3421 break; 3422 default: 3423 return T_ILLEGAL; 3424 } // end switch 3425 return type; 3426 } 3427 3428 3429 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3430 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3431 switch (type) { 3432 case T_BOOLEAN: 3433 box->bool_field_put(value_offset, value->z); 3434 break; 3435 case T_CHAR: 3436 box->char_field_put(value_offset, value->c); 3437 break; 3438 case T_FLOAT: 3439 box->float_field_put(value_offset, value->f); 3440 break; 3441 case T_DOUBLE: 3442 box->double_field_put(long_value_offset, value->d); 3443 break; 3444 case T_BYTE: 3445 box->byte_field_put(value_offset, value->b); 3446 break; 3447 case T_SHORT: 3448 box->short_field_put(value_offset, value->s); 3449 break; 3450 case T_INT: 3451 box->int_field_put(value_offset, value->i); 3452 break; 3453 case T_LONG: 3454 box->long_field_put(long_value_offset, value->j); 3455 break; 3456 default: 3457 return T_ILLEGAL; 3458 } // end switch 3459 return type; 3460 } 3461 3462 3463 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3464 switch (type) { 3465 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3466 case T_CHAR: st->print("%d", value->c); break; 3467 case T_BYTE: st->print("%d", value->b); break; 3468 case T_SHORT: st->print("%d", value->s); break; 3469 case T_INT: st->print("%d", value->i); break; 3470 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3471 case T_FLOAT: st->print("%f", value->f); break; 3472 case T_DOUBLE: st->print("%lf", value->d); break; 3473 default: st->print("type %d?", type); break; 3474 } 3475 } 3476 3477 // Support for java_lang_ref_Reference 3478 3479 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3480 assert(obj != NULL, "sanity"); 3481 if (offset != java_lang_ref_Reference::referent_offset) { 3482 return false; 3483 } 3484 3485 Klass* k = obj->klass(); 3486 if (!k->is_instance_klass()) { 3487 return false; 3488 } 3489 3490 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3491 bool is_reference = ik->reference_type() != REF_NONE; 3492 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3493 return is_reference; 3494 } 3495 3496 // Support for java_lang_ref_SoftReference 3497 // 3498 3499 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3500 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3501 macro(static_clock_offset, k, "clock", long_signature, true) 3502 3503 void java_lang_ref_SoftReference::compute_offsets() { 3504 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3505 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3506 } 3507 3508 #if INCLUDE_CDS 3509 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3510 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3511 } 3512 #endif 3513 3514 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3515 return ref->long_field(timestamp_offset); 3516 } 3517 3518 jlong java_lang_ref_SoftReference::clock() { 3519 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3520 oop base = ik->static_field_base_raw(); 3521 return base->long_field(static_clock_offset); 3522 } 3523 3524 void java_lang_ref_SoftReference::set_clock(jlong value) { 3525 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3526 oop base = ik->static_field_base_raw(); 3527 base->long_field_put(static_clock_offset, value); 3528 } 3529 3530 // Support for java_lang_invoke_DirectMethodHandle 3531 3532 int java_lang_invoke_DirectMethodHandle::_member_offset; 3533 3534 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3535 oop member_name = NULL; 3536 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3537 "a DirectMethodHandle oop is expected"); 3538 return dmh->obj_field(member_offset_in_bytes()); 3539 } 3540 3541 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3542 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3543 3544 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3545 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3546 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3547 } 3548 3549 #if INCLUDE_CDS 3550 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3551 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3552 } 3553 #endif 3554 3555 // Support for java_lang_invoke_MethodHandle 3556 3557 int java_lang_invoke_MethodHandle::_type_offset; 3558 int java_lang_invoke_MethodHandle::_form_offset; 3559 3560 int java_lang_invoke_MemberName::_clazz_offset; 3561 int java_lang_invoke_MemberName::_name_offset; 3562 int java_lang_invoke_MemberName::_type_offset; 3563 int java_lang_invoke_MemberName::_flags_offset; 3564 int java_lang_invoke_MemberName::_method_offset; 3565 int java_lang_invoke_MemberName::_vmindex_offset; 3566 3567 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3568 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3569 3570 int java_lang_invoke_LambdaForm::_vmentry_offset; 3571 3572 #define METHODHANDLE_FIELDS_DO(macro) \ 3573 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3574 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3575 3576 void java_lang_invoke_MethodHandle::compute_offsets() { 3577 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3578 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3579 } 3580 3581 #if INCLUDE_CDS 3582 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3583 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3584 } 3585 #endif 3586 3587 #define MEMBERNAME_FIELDS_DO(macro) \ 3588 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3589 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3590 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3591 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3592 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3593 3594 void java_lang_invoke_MemberName::compute_offsets() { 3595 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3596 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3597 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3598 } 3599 3600 #if INCLUDE_CDS 3601 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3602 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3603 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3604 } 3605 #endif 3606 3607 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3608 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3609 assert(k != NULL, "jdk mismatch"); 3610 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3611 } 3612 3613 #if INCLUDE_CDS 3614 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3615 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3616 } 3617 #endif 3618 3619 #define LAMBDAFORM_FIELDS_DO(macro) \ 3620 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3621 3622 void java_lang_invoke_LambdaForm::compute_offsets() { 3623 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3624 assert (k != NULL, "jdk mismatch"); 3625 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3626 } 3627 3628 #if INCLUDE_CDS 3629 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3630 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3631 } 3632 #endif 3633 3634 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3635 return obj != NULL && is_subclass(obj->klass()); 3636 } 3637 3638 3639 oop java_lang_invoke_MethodHandle::type(oop mh) { 3640 return mh->obj_field(_type_offset); 3641 } 3642 3643 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3644 mh->obj_field_put(_type_offset, mtype); 3645 } 3646 3647 oop java_lang_invoke_MethodHandle::form(oop mh) { 3648 assert(_form_offset != 0, ""); 3649 return mh->obj_field(_form_offset); 3650 } 3651 3652 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3653 assert(_form_offset != 0, ""); 3654 mh->obj_field_put(_form_offset, lform); 3655 } 3656 3657 /// MemberName accessors 3658 3659 oop java_lang_invoke_MemberName::clazz(oop mname) { 3660 assert(is_instance(mname), "wrong type"); 3661 return mname->obj_field(_clazz_offset); 3662 } 3663 3664 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3665 assert(is_instance(mname), "wrong type"); 3666 mname->obj_field_put(_clazz_offset, clazz); 3667 } 3668 3669 oop java_lang_invoke_MemberName::name(oop mname) { 3670 assert(is_instance(mname), "wrong type"); 3671 return mname->obj_field(_name_offset); 3672 } 3673 3674 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3675 assert(is_instance(mname), "wrong type"); 3676 mname->obj_field_put(_name_offset, name); 3677 } 3678 3679 oop java_lang_invoke_MemberName::type(oop mname) { 3680 assert(is_instance(mname), "wrong type"); 3681 return mname->obj_field(_type_offset); 3682 } 3683 3684 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3685 assert(is_instance(mname), "wrong type"); 3686 mname->obj_field_put(_type_offset, type); 3687 } 3688 3689 int java_lang_invoke_MemberName::flags(oop mname) { 3690 assert(is_instance(mname), "wrong type"); 3691 return mname->int_field(_flags_offset); 3692 } 3693 3694 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3695 assert(is_instance(mname), "wrong type"); 3696 mname->int_field_put(_flags_offset, flags); 3697 } 3698 3699 3700 // Return vmtarget from ResolvedMethodName method field through indirection 3701 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3702 assert(is_instance(mname), "wrong type"); 3703 oop method = mname->obj_field(_method_offset); 3704 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3705 } 3706 3707 bool java_lang_invoke_MemberName::is_method(oop mname) { 3708 assert(is_instance(mname), "must be MemberName"); 3709 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3710 } 3711 3712 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3713 assert(is_instance(mname), "wrong type"); 3714 mname->obj_field_put(_method_offset, resolved_method); 3715 } 3716 3717 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3718 assert(is_instance(mname), "wrong type"); 3719 return (intptr_t) mname->address_field(_vmindex_offset); 3720 } 3721 3722 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3723 assert(is_instance(mname), "wrong type"); 3724 mname->address_field_put(_vmindex_offset, (address) index); 3725 } 3726 3727 3728 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3729 assert(is_instance(resolved_method), "wrong type"); 3730 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3731 assert(m->is_method(), "must be"); 3732 return m; 3733 } 3734 3735 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3736 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3737 assert(is_instance(resolved_method), "wrong type"); 3738 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3739 } 3740 3741 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3742 assert(is_instance(resolved_method), "wrong type"); 3743 resolved_method->obj_field_put(_vmholder_offset, holder); 3744 } 3745 3746 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3747 const Method* method = m(); 3748 3749 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3750 oop resolved_method = ResolvedMethodTable::find_method(method); 3751 if (resolved_method != NULL) { 3752 return resolved_method; 3753 } 3754 3755 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3756 if (!k->is_initialized()) { 3757 k->initialize(CHECK_NULL); 3758 } 3759 3760 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3761 3762 NoSafepointVerifier nsv; 3763 3764 if (method->is_old()) { 3765 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3766 method->get_new_method(); 3767 } 3768 3769 InstanceKlass* holder = method->method_holder(); 3770 3771 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3772 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3773 // distinct loaders) to ensure the metadata is kept alive. 3774 // This mirror may be different than the one in clazz field. 3775 set_vmholder(new_resolved_method, holder->java_mirror()); 3776 3777 // Set flag in class to indicate this InstanceKlass has entries in the table 3778 // to avoid walking table during redefinition if none of the redefined classes 3779 // have any membernames in the table. 3780 holder->set_has_resolved_methods(); 3781 3782 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3783 } 3784 3785 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3786 assert(is_instance(lform), "wrong type"); 3787 return lform->obj_field(_vmentry_offset); 3788 } 3789 3790 3791 // Support for java_lang_invoke_MethodType 3792 3793 int java_lang_invoke_MethodType::_rtype_offset; 3794 int java_lang_invoke_MethodType::_ptypes_offset; 3795 3796 #define METHODTYPE_FIELDS_DO(macro) \ 3797 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3798 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3799 3800 void java_lang_invoke_MethodType::compute_offsets() { 3801 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3802 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3803 } 3804 3805 #if INCLUDE_CDS 3806 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3807 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3808 } 3809 #endif 3810 3811 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3812 st->print("("); 3813 objArrayOop pts = ptypes(mt); 3814 for (int i = 0, limit = pts->length(); i < limit; i++) { 3815 java_lang_Class::print_signature(pts->obj_at(i), st); 3816 } 3817 st->print(")"); 3818 java_lang_Class::print_signature(rtype(mt), st); 3819 } 3820 3821 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 3822 ResourceMark rm; 3823 stringStream buffer(128); 3824 print_signature(mt, &buffer); 3825 const char* sigstr = buffer.base(); 3826 int siglen = (int) buffer.size(); 3827 Symbol *name; 3828 if (!intern_if_not_found) { 3829 name = SymbolTable::probe(sigstr, siglen); 3830 } else { 3831 name = SymbolTable::new_symbol(sigstr, siglen); 3832 } 3833 return name; 3834 } 3835 3836 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3837 if (mt1 == mt2) 3838 return true; 3839 if (rtype(mt1) != rtype(mt2)) 3840 return false; 3841 if (ptype_count(mt1) != ptype_count(mt2)) 3842 return false; 3843 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3844 if (ptype(mt1, i) != ptype(mt2, i)) 3845 return false; 3846 } 3847 return true; 3848 } 3849 3850 oop java_lang_invoke_MethodType::rtype(oop mt) { 3851 assert(is_instance(mt), "must be a MethodType"); 3852 return mt->obj_field(_rtype_offset); 3853 } 3854 3855 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3856 assert(is_instance(mt), "must be a MethodType"); 3857 return (objArrayOop) mt->obj_field(_ptypes_offset); 3858 } 3859 3860 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3861 return ptypes(mt)->obj_at(idx); 3862 } 3863 3864 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3865 return ptypes(mt)->length(); 3866 } 3867 3868 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3869 objArrayOop pts = ptypes(mt); 3870 int count = pts->length(); 3871 int slots = 0; 3872 for (int i = 0; i < count; i++) { 3873 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3874 slots += type2size[bt]; 3875 } 3876 return slots; 3877 } 3878 3879 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3880 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3881 return type2size[bt]; 3882 } 3883 3884 3885 // Support for java_lang_invoke_CallSite 3886 3887 int java_lang_invoke_CallSite::_target_offset; 3888 int java_lang_invoke_CallSite::_context_offset; 3889 3890 #define CALLSITE_FIELDS_DO(macro) \ 3891 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3892 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3893 3894 void java_lang_invoke_CallSite::compute_offsets() { 3895 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3896 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3897 } 3898 3899 #if INCLUDE_CDS 3900 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3901 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3902 } 3903 #endif 3904 3905 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3906 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3907 3908 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3909 return dep_oop; 3910 } 3911 3912 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3913 3914 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3915 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3916 3917 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3918 InstanceKlass* k = SystemDictionary::Context_klass(); 3919 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3920 } 3921 3922 #if INCLUDE_CDS 3923 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3924 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3925 } 3926 #endif 3927 3928 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3929 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3930 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3931 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3932 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3933 return dep_ctx; 3934 } 3935 3936 // Support for java_security_AccessControlContext 3937 3938 int java_security_AccessControlContext::_context_offset = 0; 3939 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3940 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3941 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3942 3943 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3944 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3945 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3946 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3947 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3948 3949 void java_security_AccessControlContext::compute_offsets() { 3950 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3951 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3952 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3953 } 3954 3955 #if INCLUDE_CDS 3956 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3957 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3958 } 3959 #endif 3960 3961 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3962 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3963 // Ensure klass is initialized 3964 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3965 // Allocate result 3966 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3967 // Fill in values 3968 result->obj_field_put(_context_offset, context()); 3969 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3970 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3971 // whitelist AccessControlContexts created by the JVM if present 3972 if (_isAuthorized_offset != -1) { 3973 result->bool_field_put(_isAuthorized_offset, true); 3974 } 3975 return result; 3976 } 3977 3978 3979 // Support for java_lang_ClassLoader 3980 3981 bool java_lang_ClassLoader::offsets_computed = false; 3982 int java_lang_ClassLoader::_loader_data_offset = -1; 3983 int java_lang_ClassLoader::parallelCapable_offset = -1; 3984 int java_lang_ClassLoader::name_offset = -1; 3985 int java_lang_ClassLoader::nameAndId_offset = -1; 3986 int java_lang_ClassLoader::unnamedModule_offset = -1; 3987 3988 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3989 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3990 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3991 } 3992 3993 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3994 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3995 return RawAccess<>::load_at(loader, _loader_data_offset); 3996 } 3997 3998 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3999 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4000 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 4001 } 4002 4003 #define CLASSLOADER_FIELDS_DO(macro) \ 4004 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4005 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4006 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4007 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4008 macro(parent_offset, k1, "parent", classloader_signature, false) 4009 4010 void java_lang_ClassLoader::compute_offsets() { 4011 assert(!offsets_computed, "offsets should be initialized only once"); 4012 offsets_computed = true; 4013 4014 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4015 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4016 4017 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4018 } 4019 4020 #if INCLUDE_CDS 4021 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4022 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4023 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4024 } 4025 #endif 4026 4027 oop java_lang_ClassLoader::parent(oop loader) { 4028 assert(is_instance(loader), "loader must be oop"); 4029 return loader->obj_field(parent_offset); 4030 } 4031 4032 // Returns the name field of this class loader. If the name field has not 4033 // been set, null will be returned. 4034 oop java_lang_ClassLoader::name(oop loader) { 4035 assert(is_instance(loader), "loader must be oop"); 4036 return loader->obj_field(name_offset); 4037 } 4038 4039 // Returns the nameAndId field of this class loader. The format is 4040 // as follows: 4041 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4042 // If the defining loader has no name then <qualified-class-name> @<id> 4043 // If built-in loader, then omit '@<id>' as there is only one instance. 4044 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4045 oop java_lang_ClassLoader::nameAndId(oop loader) { 4046 assert(is_instance(loader), "loader must be oop"); 4047 return loader->obj_field(nameAndId_offset); 4048 } 4049 4050 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4051 assert(is_instance(loader), "loader must be oop"); 4052 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4053 oop acl = loader; 4054 debug_only(jint loop_count = 0); 4055 // This loop taken verbatim from ClassLoader.java: 4056 do { 4057 acl = parent(acl); 4058 if (cl == acl) { 4059 return true; 4060 } 4061 assert(++loop_count > 0, "loop_count overflow"); 4062 } while (acl != NULL); 4063 return false; 4064 } 4065 4066 bool java_lang_ClassLoader::is_instance(oop obj) { 4067 return obj != NULL && is_subclass(obj->klass()); 4068 } 4069 4070 4071 // For class loader classes, parallelCapable defined 4072 // based on non-null field 4073 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4074 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4075 if (parallelCapable_offset == -1) { 4076 // Default for backward compatibility is false 4077 return false; 4078 } 4079 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4080 } 4081 4082 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4083 // Fix for 4474172; see evaluation for more details 4084 loader = non_reflection_class_loader(loader); 4085 4086 oop cl = SystemDictionary::java_system_loader(); 4087 while(cl != NULL) { 4088 if (cl == loader) return true; 4089 cl = parent(cl); 4090 } 4091 return false; 4092 } 4093 4094 // Return true if this is one of the class loaders associated with 4095 // the generated bytecodes for reflection. 4096 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4097 if (loader != NULL) { 4098 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4099 // This might be null in non-1.4 JDKs 4100 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4101 } 4102 return false; 4103 } 4104 4105 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4106 // See whether this is one of the class loaders associated with 4107 // the generated bytecodes for reflection, and if so, "magically" 4108 // delegate to its parent to prevent class loading from occurring 4109 // in places where applications using reflection didn't expect it. 4110 if (is_reflection_class_loader(loader)) { 4111 return parent(loader); 4112 } 4113 return loader; 4114 } 4115 4116 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4117 assert(is_instance(loader), "loader must be oop"); 4118 return loader->obj_field(unnamedModule_offset); 4119 } 4120 4121 // Support for java_lang_System 4122 // 4123 #define SYSTEM_FIELDS_DO(macro) \ 4124 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4125 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4126 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4127 macro(static_security_offset, k, "security", security_manager_signature, true) 4128 4129 void java_lang_System::compute_offsets() { 4130 InstanceKlass* k = SystemDictionary::System_klass(); 4131 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4132 } 4133 4134 #if INCLUDE_CDS 4135 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4136 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4137 } 4138 #endif 4139 4140 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4141 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4142 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4143 4144 // Support for jdk_internal_misc_UnsafeConstants 4145 // 4146 class UnsafeConstantsFixup : public FieldClosure { 4147 private: 4148 int _address_size; 4149 int _page_size; 4150 bool _big_endian; 4151 bool _use_unaligned_access; 4152 int _data_cache_line_flush_size; 4153 public: 4154 UnsafeConstantsFixup() { 4155 // round up values for all static final fields 4156 _address_size = sizeof(void*); 4157 _page_size = os::vm_page_size(); 4158 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4159 _use_unaligned_access = UseUnalignedAccesses; 4160 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4161 } 4162 4163 void do_field(fieldDescriptor* fd) { 4164 oop mirror = fd->field_holder()->java_mirror(); 4165 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4166 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4167 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4168 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4169 if (fd->name() == vmSymbols::address_size_name()) { 4170 mirror->int_field_put(fd->offset(), _address_size); 4171 } else if (fd->name() == vmSymbols::page_size_name()) { 4172 mirror->int_field_put(fd->offset(), _page_size); 4173 } else if (fd->name() == vmSymbols::big_endian_name()) { 4174 mirror->bool_field_put(fd->offset(), _big_endian); 4175 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4176 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4177 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4178 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4179 } else { 4180 assert(false, "unexpected UnsafeConstants field"); 4181 } 4182 } 4183 }; 4184 4185 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4186 UnsafeConstantsFixup fixup; 4187 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4188 } 4189 4190 int java_lang_Class::_klass_offset; 4191 int java_lang_Class::_array_klass_offset; 4192 int java_lang_Class::_oop_size_offset; 4193 int java_lang_Class::_static_oop_field_count_offset; 4194 int java_lang_Class::_class_loader_offset; 4195 int java_lang_Class::_module_offset; 4196 int java_lang_Class::_protection_domain_offset; 4197 int java_lang_Class::_component_mirror_offset; 4198 int java_lang_Class::_init_lock_offset; 4199 int java_lang_Class::_signers_offset; 4200 int java_lang_Class::_name_offset; 4201 int java_lang_Class::_source_file_offset; 4202 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4203 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4204 int java_lang_Throwable::backtrace_offset; 4205 int java_lang_Throwable::detailMessage_offset; 4206 int java_lang_Throwable::stackTrace_offset; 4207 int java_lang_Throwable::depth_offset; 4208 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4209 int java_lang_reflect_AccessibleObject::override_offset; 4210 int java_lang_reflect_Method::clazz_offset; 4211 int java_lang_reflect_Method::name_offset; 4212 int java_lang_reflect_Method::returnType_offset; 4213 int java_lang_reflect_Method::parameterTypes_offset; 4214 int java_lang_reflect_Method::exceptionTypes_offset; 4215 int java_lang_reflect_Method::slot_offset; 4216 int java_lang_reflect_Method::modifiers_offset; 4217 int java_lang_reflect_Method::signature_offset; 4218 int java_lang_reflect_Method::annotations_offset; 4219 int java_lang_reflect_Method::parameter_annotations_offset; 4220 int java_lang_reflect_Method::annotation_default_offset; 4221 int java_lang_reflect_Constructor::clazz_offset; 4222 int java_lang_reflect_Constructor::parameterTypes_offset; 4223 int java_lang_reflect_Constructor::exceptionTypes_offset; 4224 int java_lang_reflect_Constructor::slot_offset; 4225 int java_lang_reflect_Constructor::modifiers_offset; 4226 int java_lang_reflect_Constructor::signature_offset; 4227 int java_lang_reflect_Constructor::annotations_offset; 4228 int java_lang_reflect_Constructor::parameter_annotations_offset; 4229 int java_lang_reflect_Field::clazz_offset; 4230 int java_lang_reflect_Field::name_offset; 4231 int java_lang_reflect_Field::type_offset; 4232 int java_lang_reflect_Field::slot_offset; 4233 int java_lang_reflect_Field::modifiers_offset; 4234 int java_lang_reflect_Field::signature_offset; 4235 int java_lang_reflect_Field::annotations_offset; 4236 int java_lang_reflect_Parameter::name_offset; 4237 int java_lang_reflect_Parameter::modifiers_offset; 4238 int java_lang_reflect_Parameter::index_offset; 4239 int java_lang_reflect_Parameter::executable_offset; 4240 int java_lang_boxing_object::value_offset; 4241 int java_lang_boxing_object::long_value_offset; 4242 int java_lang_ref_Reference::referent_offset; 4243 int java_lang_ref_Reference::queue_offset; 4244 int java_lang_ref_Reference::next_offset; 4245 int java_lang_ref_Reference::discovered_offset; 4246 int java_lang_ref_SoftReference::timestamp_offset; 4247 int java_lang_ref_SoftReference::static_clock_offset; 4248 int java_lang_ClassLoader::parent_offset; 4249 int java_lang_System::static_in_offset; 4250 int java_lang_System::static_out_offset; 4251 int java_lang_System::static_err_offset; 4252 int java_lang_System::static_security_offset; 4253 int java_lang_StackTraceElement::methodName_offset; 4254 int java_lang_StackTraceElement::fileName_offset; 4255 int java_lang_StackTraceElement::lineNumber_offset; 4256 int java_lang_StackTraceElement::moduleName_offset; 4257 int java_lang_StackTraceElement::moduleVersion_offset; 4258 int java_lang_StackTraceElement::classLoaderName_offset; 4259 int java_lang_StackTraceElement::declaringClass_offset; 4260 int java_lang_StackTraceElement::declaringClassObject_offset; 4261 int java_lang_StackFrameInfo::_memberName_offset; 4262 int java_lang_StackFrameInfo::_bci_offset; 4263 int java_lang_StackFrameInfo::_version_offset; 4264 int java_lang_LiveStackFrameInfo::_monitors_offset; 4265 int java_lang_LiveStackFrameInfo::_locals_offset; 4266 int java_lang_LiveStackFrameInfo::_operands_offset; 4267 int java_lang_LiveStackFrameInfo::_mode_offset; 4268 int java_lang_AssertionStatusDirectives::classes_offset; 4269 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4270 int java_lang_AssertionStatusDirectives::packages_offset; 4271 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4272 int java_lang_AssertionStatusDirectives::deflt_offset; 4273 int java_nio_Buffer::_limit_offset; 4274 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4275 int reflect_ConstantPool::_oop_offset; 4276 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4277 int java_lang_Integer_IntegerCache::_static_cache_offset; 4278 int java_lang_Long_LongCache::_static_cache_offset; 4279 int java_lang_Character_CharacterCache::_static_cache_offset; 4280 int java_lang_Short_ShortCache::_static_cache_offset; 4281 int java_lang_Byte_ByteCache::_static_cache_offset; 4282 int java_lang_Boolean::_static_TRUE_offset; 4283 int java_lang_Boolean::_static_FALSE_offset; 4284 int java_lang_reflect_RecordComponent::clazz_offset; 4285 int java_lang_reflect_RecordComponent::name_offset; 4286 int java_lang_reflect_RecordComponent::type_offset; 4287 int java_lang_reflect_RecordComponent::accessor_offset; 4288 int java_lang_reflect_RecordComponent::signature_offset; 4289 int java_lang_reflect_RecordComponent::annotations_offset; 4290 int java_lang_reflect_RecordComponent::typeAnnotations_offset; 4291 4292 4293 4294 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4295 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4296 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4297 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4298 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4299 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4300 macro(methodName_offset, k, "methodName", string_signature, false); \ 4301 macro(fileName_offset, k, "fileName", string_signature, false); \ 4302 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4303 4304 // Support for java_lang_StackTraceElement 4305 void java_lang_StackTraceElement::compute_offsets() { 4306 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4307 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4308 } 4309 4310 #if INCLUDE_CDS 4311 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4312 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4313 } 4314 #endif 4315 4316 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4317 element->obj_field_put(fileName_offset, value); 4318 } 4319 4320 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4321 element->obj_field_put(declaringClass_offset, value); 4322 } 4323 4324 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4325 element->obj_field_put(methodName_offset, value); 4326 } 4327 4328 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4329 element->int_field_put(lineNumber_offset, value); 4330 } 4331 4332 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4333 element->obj_field_put(moduleName_offset, value); 4334 } 4335 4336 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4337 element->obj_field_put(moduleVersion_offset, value); 4338 } 4339 4340 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4341 element->obj_field_put(classLoaderName_offset, value); 4342 } 4343 4344 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4345 element->obj_field_put(declaringClassObject_offset, value); 4346 } 4347 4348 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4349 element->short_field_put(_version_offset, value); 4350 } 4351 4352 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4353 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 4354 element->int_field_put(_bci_offset, value); 4355 } 4356 4357 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4358 element->obj_field_put(_monitors_offset, value); 4359 } 4360 4361 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4362 element->obj_field_put(_locals_offset, value); 4363 } 4364 4365 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4366 element->obj_field_put(_operands_offset, value); 4367 } 4368 4369 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4370 element->int_field_put(_mode_offset, value); 4371 } 4372 4373 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4374 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4375 macro(classes_offset, k, "classes", string_array_signature, false); \ 4376 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4377 macro(packages_offset, k, "packages", string_array_signature, false); \ 4378 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4379 macro(deflt_offset, k, "deflt", bool_signature, false) 4380 4381 void java_lang_AssertionStatusDirectives::compute_offsets() { 4382 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4383 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4384 } 4385 4386 #if INCLUDE_CDS 4387 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4388 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4389 } 4390 #endif 4391 4392 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4393 o->obj_field_put(classes_offset, val); 4394 } 4395 4396 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4397 o->obj_field_put(classEnabled_offset, val); 4398 } 4399 4400 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4401 o->obj_field_put(packages_offset, val); 4402 } 4403 4404 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4405 o->obj_field_put(packageEnabled_offset, val); 4406 } 4407 4408 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4409 o->bool_field_put(deflt_offset, val); 4410 } 4411 4412 4413 // Support for intrinsification of java.nio.Buffer.checkIndex 4414 int java_nio_Buffer::limit_offset() { 4415 return _limit_offset; 4416 } 4417 4418 #define BUFFER_FIELDS_DO(macro) \ 4419 macro(_limit_offset, k, "limit", int_signature, false) 4420 4421 void java_nio_Buffer::compute_offsets() { 4422 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4423 assert(k != NULL, "must be loaded in 1.4+"); 4424 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4425 } 4426 4427 #if INCLUDE_CDS 4428 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4429 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4430 } 4431 #endif 4432 4433 #define AOS_FIELDS_DO(macro) \ 4434 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4435 4436 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4437 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4438 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4439 } 4440 4441 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4442 assert(_owner_offset != 0, "Must be initialized"); 4443 return obj->obj_field(_owner_offset); 4444 } 4445 4446 #if INCLUDE_CDS 4447 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4448 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4449 } 4450 #endif 4451 4452 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4453 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4454 4455 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4456 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4457 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4458 } 4459 4460 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4461 oop base = ik->static_field_base_raw(); 4462 return objArrayOop(base->obj_field(_static_cache_offset)); 4463 } 4464 4465 Symbol* java_lang_Integer_IntegerCache::symbol() { 4466 return vmSymbols::java_lang_Integer_IntegerCache(); 4467 } 4468 4469 #if INCLUDE_CDS 4470 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4471 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4472 } 4473 #endif 4474 #undef INTEGER_CACHE_FIELDS_DO 4475 4476 jint java_lang_Integer::value(oop obj) { 4477 jvalue v; 4478 java_lang_boxing_object::get_value(obj, &v); 4479 return v.i; 4480 } 4481 4482 #define LONG_CACHE_FIELDS_DO(macro) \ 4483 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4484 4485 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4486 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4487 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4488 } 4489 4490 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4491 oop base = ik->static_field_base_raw(); 4492 return objArrayOop(base->obj_field(_static_cache_offset)); 4493 } 4494 4495 Symbol* java_lang_Long_LongCache::symbol() { 4496 return vmSymbols::java_lang_Long_LongCache(); 4497 } 4498 4499 #if INCLUDE_CDS 4500 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4501 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4502 } 4503 #endif 4504 #undef LONG_CACHE_FIELDS_DO 4505 4506 jlong java_lang_Long::value(oop obj) { 4507 jvalue v; 4508 java_lang_boxing_object::get_value(obj, &v); 4509 return v.j; 4510 } 4511 4512 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4513 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4514 4515 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4516 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4517 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4518 } 4519 4520 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4521 oop base = ik->static_field_base_raw(); 4522 return objArrayOop(base->obj_field(_static_cache_offset)); 4523 } 4524 4525 Symbol* java_lang_Character_CharacterCache::symbol() { 4526 return vmSymbols::java_lang_Character_CharacterCache(); 4527 } 4528 4529 #if INCLUDE_CDS 4530 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4531 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4532 } 4533 #endif 4534 #undef CHARACTER_CACHE_FIELDS_DO 4535 4536 jchar java_lang_Character::value(oop obj) { 4537 jvalue v; 4538 java_lang_boxing_object::get_value(obj, &v); 4539 return v.c; 4540 } 4541 4542 #define SHORT_CACHE_FIELDS_DO(macro) \ 4543 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4544 4545 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4546 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4547 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4548 } 4549 4550 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4551 oop base = ik->static_field_base_raw(); 4552 return objArrayOop(base->obj_field(_static_cache_offset)); 4553 } 4554 4555 Symbol* java_lang_Short_ShortCache::symbol() { 4556 return vmSymbols::java_lang_Short_ShortCache(); 4557 } 4558 4559 #if INCLUDE_CDS 4560 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4561 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4562 } 4563 #endif 4564 #undef SHORT_CACHE_FIELDS_DO 4565 4566 jshort java_lang_Short::value(oop obj) { 4567 jvalue v; 4568 java_lang_boxing_object::get_value(obj, &v); 4569 return v.s; 4570 } 4571 4572 #define BYTE_CACHE_FIELDS_DO(macro) \ 4573 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4574 4575 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4576 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4577 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4578 } 4579 4580 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4581 oop base = ik->static_field_base_raw(); 4582 return objArrayOop(base->obj_field(_static_cache_offset)); 4583 } 4584 4585 Symbol* java_lang_Byte_ByteCache::symbol() { 4586 return vmSymbols::java_lang_Byte_ByteCache(); 4587 } 4588 4589 #if INCLUDE_CDS 4590 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4591 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4592 } 4593 #endif 4594 #undef BYTE_CACHE_FIELDS_DO 4595 4596 jbyte java_lang_Byte::value(oop obj) { 4597 jvalue v; 4598 java_lang_boxing_object::get_value(obj, &v); 4599 return v.b; 4600 } 4601 #define BOOLEAN_FIELDS_DO(macro) \ 4602 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4603 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4604 4605 4606 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4607 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4608 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4609 } 4610 4611 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4612 oop base = ik->static_field_base_raw(); 4613 return base->obj_field(_static_TRUE_offset); 4614 } 4615 4616 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4617 oop base = ik->static_field_base_raw(); 4618 return base->obj_field(_static_FALSE_offset); 4619 } 4620 4621 Symbol* java_lang_Boolean::symbol() { 4622 return vmSymbols::java_lang_Boolean(); 4623 } 4624 4625 #if INCLUDE_CDS 4626 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4627 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4628 } 4629 #endif 4630 #undef BOOLEAN_CACHE_FIELDS_DO 4631 4632 jboolean java_lang_Boolean::value(oop obj) { 4633 jvalue v; 4634 java_lang_boxing_object::get_value(obj, &v); 4635 return v.z; 4636 } 4637 4638 static int member_offset(int hardcoded_offset) { 4639 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4640 } 4641 4642 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 4643 macro(clazz_offset, k, "clazz", class_signature, false); \ 4644 macro(name_offset, k, "name", string_signature, false); \ 4645 macro(type_offset, k, "type", class_signature, false); \ 4646 macro(accessor_offset, k, "accessor", reflect_method_signature, false); \ 4647 macro(signature_offset, k, "signature", string_signature, false); \ 4648 macro(annotations_offset, k, "annotations", byte_array_signature, false); \ 4649 macro(typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 4650 4651 // Support for java_lang_reflect_RecordComponent 4652 void java_lang_reflect_RecordComponent::compute_offsets() { 4653 InstanceKlass* k = SystemDictionary::RecordComponent_klass(); 4654 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4655 } 4656 4657 #if INCLUDE_CDS 4658 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 4659 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4660 } 4661 #endif 4662 4663 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 4664 element->obj_field_put(clazz_offset, value); 4665 } 4666 4667 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 4668 element->obj_field_put(name_offset, value); 4669 } 4670 4671 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 4672 element->obj_field_put(type_offset, value); 4673 } 4674 4675 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 4676 element->obj_field_put(accessor_offset, value); 4677 } 4678 4679 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 4680 element->obj_field_put(signature_offset, value); 4681 } 4682 4683 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 4684 element->obj_field_put(annotations_offset, value); 4685 } 4686 4687 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 4688 element->obj_field_put(typeAnnotations_offset, value); 4689 } 4690 4691 // Compute hard-coded offsets 4692 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4693 // are not available to determine the offset_of_static_fields. 4694 void JavaClasses::compute_hard_coded_offsets() { 4695 4696 // java_lang_boxing_object 4697 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4698 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4699 4700 // java_lang_ref_Reference 4701 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4702 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4703 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4704 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4705 } 4706 4707 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4708 4709 // Compute non-hard-coded field offsets of all the classes in this file 4710 void JavaClasses::compute_offsets() { 4711 if (UseSharedSpaces) { 4712 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4713 JvmtiExport::has_early_class_hook_env()), 4714 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4715 // None of the classes used by the rest of this function can be replaced by 4716 // JMVTI ClassFileLoadHook. 4717 // We are safe to use the archived offsets, which have already been restored 4718 // by JavaClasses::serialize_offsets, without computing the offsets again. 4719 return; 4720 } 4721 4722 // We have already called the compute_offsets() of the 4723 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4724 // earlier inside SystemDictionary::resolve_well_known_classes() 4725 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4726 } 4727 4728 #if INCLUDE_CDS 4729 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4730 4731 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4732 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4733 } 4734 #endif 4735 4736 4737 #ifndef PRODUCT 4738 4739 // These functions exist to assert the validity of hard-coded field offsets to guard 4740 // against changes in the class files 4741 4742 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4743 EXCEPTION_MARK; 4744 fieldDescriptor fd; 4745 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4746 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4747 InstanceKlass* ik = InstanceKlass::cast(k); 4748 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4749 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4750 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4751 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4752 return false; 4753 } 4754 if (fd.is_static()) { 4755 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4756 return false; 4757 } 4758 if (fd.offset() == hardcoded_offset ) { 4759 return true; 4760 } else { 4761 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4762 klass_name, field_name, hardcoded_offset, fd.offset()); 4763 return false; 4764 } 4765 } 4766 4767 // Check the hard-coded field offsets of all the classes in this file 4768 4769 void JavaClasses::check_offsets() { 4770 bool valid = true; 4771 4772 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4773 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4774 4775 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4776 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4777 4778 // Boxed primitive objects (java_lang_boxing_object) 4779 4780 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4781 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4782 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4783 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4784 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4785 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4786 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4787 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4788 4789 // java.lang.ref.Reference 4790 4791 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4792 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4793 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4794 // Fake field 4795 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4796 4797 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4798 } 4799 4800 #endif // PRODUCT 4801 4802 int InjectedField::compute_offset() { 4803 InstanceKlass* ik = InstanceKlass::cast(klass()); 4804 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4805 if (!may_be_java && !fs.access_flags().is_internal()) { 4806 // Only look at injected fields 4807 continue; 4808 } 4809 if (fs.name() == name() && fs.signature() == signature()) { 4810 return fs.offset(); 4811 } 4812 } 4813 ResourceMark rm; 4814 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)" : ""); 4815 #ifndef PRODUCT 4816 ik->print(); 4817 tty->print_cr("all fields:"); 4818 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4819 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4820 } 4821 #endif //PRODUCT 4822 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4823 return -1; 4824 } 4825 4826 void javaClasses_init() { 4827 JavaClasses::compute_offsets(); 4828 JavaClasses::check_offsets(); 4829 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4830 }