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.inline.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/init.hpp" 61 #include "runtime/interfaceSupport.inline.hpp" 62 #include "runtime/java.hpp" 63 #include "runtime/javaCalls.hpp" 64 #include "runtime/jniHandles.inline.hpp" 65 #include "runtime/safepoint.hpp" 66 #include "runtime/safepointVerifiers.hpp" 67 #include "runtime/thread.inline.hpp" 68 #include "runtime/vframe.inline.hpp" 69 #include "runtime/vm_version.hpp" 70 #include "utilities/align.hpp" 71 #include "utilities/preserveException.hpp" 72 #include "utilities/utf8.hpp" 73 #if INCLUDE_JVMCI 74 #include "jvmci/jvmciJavaClasses.hpp" 75 #endif 76 77 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 78 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 79 80 #if INCLUDE_CDS 81 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 82 f->do_u4((u4*)&_##name##_offset); 83 #endif 84 85 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 86 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 87 88 InjectedField JavaClasses::_injected_fields[] = { 89 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 90 }; 91 92 // Register native methods of Object 93 void java_lang_Object::register_natives(TRAPS) { 94 InstanceKlass* obj = SystemDictionary::Object_klass(); 95 Method::register_native(obj, vmSymbols::hashCode_name(), 96 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 97 Method::register_native(obj, vmSymbols::wait_name(), 98 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 99 Method::register_native(obj, vmSymbols::notify_name(), 100 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 101 Method::register_native(obj, vmSymbols::notifyAll_name(), 102 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 103 Method::register_native(obj, vmSymbols::clone_name(), 104 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 105 } 106 107 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 108 return _injected_fields[id].compute_offset(); 109 } 110 111 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 112 *field_count = 0; 113 114 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 115 if (sid == vmSymbols::NO_SID) { 116 // Only well known classes can inject fields 117 return NULL; 118 } 119 120 int count = 0; 121 int start = -1; 122 123 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 124 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 125 count++; \ 126 if (start == -1) start = klass##_##name##_enum; \ 127 } 128 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 129 #undef LOOKUP_INJECTED_FIELD 130 131 if (start != -1) { 132 *field_count = count; 133 return _injected_fields + start; 134 } 135 return NULL; 136 } 137 138 139 // Helpful routine for computing field offsets at run time rather than hardcoding them 140 // Finds local fields only, including static fields. Static field offsets are from the 141 // beginning of the mirror. 142 static void compute_offset(int &dest_offset, 143 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 144 bool is_static = false) { 145 fieldDescriptor fd; 146 if (ik == NULL) { 147 ResourceMark rm; 148 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 149 vm_exit_during_initialization("Invalid layout of well-known class"); 150 } 151 152 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 153 ResourceMark rm; 154 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 155 name_symbol->as_C_string(), signature_symbol->as_C_string()); 156 #ifndef PRODUCT 157 // Prints all fields and offsets 158 Log(class) lt; 159 LogStream ls(lt.error()); 160 ik->print_on(&ls); 161 #endif //PRODUCT 162 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 163 } 164 dest_offset = fd.offset(); 165 } 166 167 // Overloading to pass name as a string. 168 static void compute_offset(int& dest_offset, InstanceKlass* ik, 169 const char* name_string, Symbol* signature_symbol, 170 bool is_static = false) { 171 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 172 if (name == NULL) { 173 ResourceMark rm; 174 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 175 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 176 } 177 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 178 } 179 180 int java_lang_String::value_offset = 0; 181 int java_lang_String::hash_offset = 0; 182 int java_lang_String::hashIsZero_offset = 0; 183 int java_lang_String::coder_offset = 0; 184 185 bool java_lang_String::initialized = false; 186 187 bool java_lang_String::is_instance(oop obj) { 188 return is_instance_inlined(obj); 189 } 190 191 #if INCLUDE_CDS 192 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 193 f->do_u4((u4*)&offset) 194 #endif 195 196 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 197 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 198 199 #define STRING_FIELDS_DO(macro) \ 200 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 201 macro(hash_offset, k, "hash", int_signature, false); \ 202 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 203 macro(coder_offset, k, "coder", byte_signature, false); 204 205 void java_lang_String::compute_offsets() { 206 if (initialized) { 207 return; 208 } 209 210 InstanceKlass* k = SystemDictionary::String_klass(); 211 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 212 213 initialized = true; 214 } 215 216 #if INCLUDE_CDS 217 void java_lang_String::serialize_offsets(SerializeClosure* f) { 218 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 219 f->do_bool(&initialized); 220 } 221 #endif 222 223 class CompactStringsFixup : public FieldClosure { 224 private: 225 bool _value; 226 227 public: 228 CompactStringsFixup(bool value) : _value(value) {} 229 230 void do_field(fieldDescriptor* fd) { 231 if (fd->name() == vmSymbols::compact_strings_name()) { 232 oop mirror = fd->field_holder()->java_mirror(); 233 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 234 assert(mirror != NULL, "String must have mirror already"); 235 mirror->bool_field_put(fd->offset(), _value); 236 } 237 } 238 }; 239 240 void java_lang_String::set_compact_strings(bool value) { 241 CompactStringsFixup fix(value); 242 SystemDictionary::String_klass()->do_local_static_fields(&fix); 243 } 244 245 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 246 assert(initialized, "Must be initialized"); 247 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 248 249 // Create the String object first, so there's a chance that the String 250 // and the char array it points to end up in the same cache line. 251 oop obj; 252 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 253 254 // Create the char array. The String object must be handlized here 255 // because GC can happen as a result of the allocation attempt. 256 Handle h_obj(THREAD, obj); 257 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 258 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 259 260 // Point the String at the char array 261 obj = h_obj(); 262 set_value(obj, buffer); 263 // No need to zero the offset, allocation zero'ed the entire String object 264 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 265 return h_obj; 266 } 267 268 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 269 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 270 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 271 typeArrayOop buffer = value(h_obj()); 272 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 273 if (is_latin1) { 274 for (int index = 0; index < length; index++) { 275 buffer->byte_at_put(index, (jbyte)unicode[index]); 276 } 277 } else { 278 for (int index = 0; index < length; index++) { 279 buffer->char_at_put(index, unicode[index]); 280 } 281 } 282 283 #ifdef ASSERT 284 { 285 ResourceMark rm; 286 char* expected = UNICODE::as_utf8(unicode, length); 287 char* actual = as_utf8_string(h_obj()); 288 if (strcmp(expected, actual) != 0) { 289 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 290 ShouldNotReachHere(); 291 } 292 } 293 #endif 294 295 return h_obj; 296 } 297 298 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 299 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 300 return h_obj(); 301 } 302 303 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 304 if (utf8_str == NULL) { 305 return Handle(); 306 } 307 bool has_multibyte, is_latin1; 308 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 309 if (!CompactStrings) { 310 has_multibyte = true; 311 is_latin1 = false; 312 } 313 314 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 315 if (length > 0) { 316 if (!has_multibyte) { 317 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 318 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 319 } else if (is_latin1) { 320 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 321 } else { 322 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 323 } 324 } 325 326 #ifdef ASSERT 327 // This check is too strict because the input string is not necessarily valid UTF8. 328 // For example, it may be created with arbitrary content via jni_NewStringUTF. 329 /* 330 { 331 ResourceMark rm; 332 const char* expected = utf8_str; 333 char* actual = as_utf8_string(h_obj()); 334 if (strcmp(expected, actual) != 0) { 335 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 336 ShouldNotReachHere(); 337 } 338 } 339 */ 340 #endif 341 342 return h_obj; 343 } 344 345 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 346 Handle h_obj = create_from_str(utf8_str, CHECK_0); 347 return h_obj(); 348 } 349 350 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 351 const char* utf8_str = (char*)symbol->bytes(); 352 int utf8_len = symbol->utf8_length(); 353 354 bool has_multibyte, is_latin1; 355 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 356 if (!CompactStrings) { 357 has_multibyte = true; 358 is_latin1 = false; 359 } 360 361 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 362 if (length > 0) { 363 if (!has_multibyte) { 364 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 365 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 366 } else if (is_latin1) { 367 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 368 } else { 369 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 370 } 371 } 372 373 #ifdef ASSERT 374 { 375 ResourceMark rm; 376 const char* expected = symbol->as_utf8(); 377 char* actual = as_utf8_string(h_obj()); 378 if (strncmp(expected, actual, utf8_len) != 0) { 379 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 380 ShouldNotReachHere(); 381 } 382 } 383 #endif 384 385 return h_obj; 386 } 387 388 // Converts a C string to a Java String based on current encoding 389 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 390 assert(str != NULL, "bad arguments"); 391 392 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 393 static to_java_string_fn_t _to_java_string_fn = NULL; 394 395 if (_to_java_string_fn == NULL) { 396 void *lib_handle = os::native_java_library(); 397 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 398 #if defined(_WIN32) && !defined(_WIN64) 399 if (_to_java_string_fn == NULL) { 400 // On 32 bit Windows, also try __stdcall decorated name 401 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 402 } 403 #endif 404 if (_to_java_string_fn == NULL) { 405 fatal("JNU_NewStringPlatform missing"); 406 } 407 } 408 409 jstring js = NULL; 410 { 411 assert(THREAD->is_Java_thread(), "must be java thread"); 412 JavaThread* thread = (JavaThread*)THREAD; 413 HandleMark hm(thread); 414 ThreadToNativeFromVM ttn(thread); 415 js = (_to_java_string_fn)(thread->jni_environment(), str); 416 } 417 418 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 419 JNIHandles::destroy_local(js); // destroy local JNIHandle. 420 return native_platform_string; 421 } 422 423 // Converts a Java String to a native C string that can be used for 424 // native OS calls. 425 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 426 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 427 static to_platform_string_fn_t _to_platform_string_fn = NULL; 428 429 if (_to_platform_string_fn == NULL) { 430 void *lib_handle = os::native_java_library(); 431 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 432 if (_to_platform_string_fn == NULL) { 433 fatal("GetStringPlatformChars missing"); 434 } 435 } 436 437 char *native_platform_string; 438 { JavaThread* thread = (JavaThread*)THREAD; 439 assert(thread->is_Java_thread(), "must be java thread"); 440 JNIEnv *env = thread->jni_environment(); 441 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 442 bool is_copy; 443 HandleMark hm(thread); 444 ThreadToNativeFromVM ttn(thread); 445 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 446 assert(is_copy == JNI_TRUE, "is_copy value changed"); 447 JNIHandles::destroy_local(js); 448 } 449 return native_platform_string; 450 } 451 452 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 453 oop obj = java_string(); 454 // Typical usage is to convert all '/' to '.' in string. 455 typeArrayOop value = java_lang_String::value(obj); 456 int length = java_lang_String::length(obj, value); 457 bool is_latin1 = java_lang_String::is_latin1(obj); 458 459 // First check if any from_char exist 460 int index; // Declared outside, used later 461 for (index = 0; index < length; index++) { 462 jchar c = !is_latin1 ? value->char_at(index) : 463 ((jchar) value->byte_at(index)) & 0xff; 464 if (c == from_char) { 465 break; 466 } 467 } 468 if (index == length) { 469 // No from_char, so do not copy. 470 return java_string; 471 } 472 473 // Check if result string will be latin1 474 bool to_is_latin1 = false; 475 476 // Replacement char must be latin1 477 if (CompactStrings && UNICODE::is_latin1(to_char)) { 478 if (is_latin1) { 479 // Source string is latin1 as well 480 to_is_latin1 = true; 481 } else if (!UNICODE::is_latin1(from_char)) { 482 // We are replacing an UTF16 char. Scan string to 483 // check if result can be latin1 encoded. 484 to_is_latin1 = true; 485 for (index = 0; index < length; index++) { 486 jchar c = value->char_at(index); 487 if (c != from_char && !UNICODE::is_latin1(c)) { 488 to_is_latin1 = false; 489 break; 490 } 491 } 492 } 493 } 494 495 // Create new UNICODE (or byte) buffer. Must handlize value because GC 496 // may happen during String and char array creation. 497 typeArrayHandle h_value(THREAD, value); 498 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 499 typeArrayOop from_buffer = h_value(); 500 typeArrayOop to_buffer = java_lang_String::value(string()); 501 502 // Copy contents 503 for (index = 0; index < length; index++) { 504 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 505 ((jchar) from_buffer->byte_at(index)) & 0xff; 506 if (c == from_char) { 507 c = to_char; 508 } 509 if (!to_is_latin1) { 510 to_buffer->char_at_put(index, c); 511 } else { 512 to_buffer->byte_at_put(index, (jbyte) c); 513 } 514 } 515 return string; 516 } 517 518 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 519 typeArrayOop value = java_lang_String::value(java_string); 520 length = java_lang_String::length(java_string, value); 521 bool is_latin1 = java_lang_String::is_latin1(java_string); 522 523 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 524 if (result != NULL) { 525 if (!is_latin1) { 526 for (int index = 0; index < length; index++) { 527 result[index] = value->char_at(index); 528 } 529 } else { 530 for (int index = 0; index < length; index++) { 531 result[index] = ((jchar) value->byte_at(index)) & 0xff; 532 } 533 } 534 } else { 535 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 536 } 537 return result; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 // The hash and hashIsZero fields are subject to a benign data race, 542 // making it crucial to ensure that any observable result of the 543 // calculation in this method stays correct under any possible read of 544 // these fields. Necessary restrictions to allow this to be correct 545 // without explicit memory fences or similar concurrency primitives is 546 // that we can ever only write to one of these two fields for a given 547 // String instance, and that the computation is idempotent and derived 548 // from immutable state 549 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 550 if (java_lang_String::hash_is_set(java_string)) { 551 return java_string->int_field(hash_offset); 552 } 553 554 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 unsigned int hash = 0; 559 if (length > 0) { 560 if (is_latin1) { 561 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 562 } else { 563 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 564 } 565 } 566 567 if (hash != 0) { 568 java_string->int_field_put(hash_offset, hash); 569 } else { 570 java_string->bool_field_put(hashIsZero_offset, true); 571 } 572 return hash; 573 } 574 575 char* java_lang_String::as_quoted_ascii(oop java_string) { 576 typeArrayOop value = java_lang_String::value(java_string); 577 int length = java_lang_String::length(java_string, value); 578 bool is_latin1 = java_lang_String::is_latin1(java_string); 579 580 if (length == 0) return NULL; 581 582 char* result; 583 int result_length; 584 if (!is_latin1) { 585 jchar* base = value->char_at_addr(0); 586 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 587 result = NEW_RESOURCE_ARRAY(char, result_length); 588 UNICODE::as_quoted_ascii(base, length, result, result_length); 589 } else { 590 jbyte* base = value->byte_at_addr(0); 591 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 592 result = NEW_RESOURCE_ARRAY(char, result_length); 593 UNICODE::as_quoted_ascii(base, length, result, result_length); 594 } 595 assert(result_length >= length + 1, "must not be shorter"); 596 assert(result_length == (int)strlen(result) + 1, "must match"); 597 return result; 598 } 599 600 Symbol* java_lang_String::as_symbol(oop java_string) { 601 typeArrayOop value = java_lang_String::value(java_string); 602 int length = java_lang_String::length(java_string, value); 603 bool is_latin1 = java_lang_String::is_latin1(java_string); 604 if (!is_latin1) { 605 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 606 Symbol* sym = SymbolTable::new_symbol(base, length); 607 return sym; 608 } else { 609 ResourceMark rm; 610 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 611 const char* base = UNICODE::as_utf8(position, length); 612 Symbol* sym = SymbolTable::new_symbol(base, length); 613 return sym; 614 } 615 } 616 617 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 618 typeArrayOop value = java_lang_String::value(java_string); 619 int length = java_lang_String::length(java_string, value); 620 bool is_latin1 = java_lang_String::is_latin1(java_string); 621 if (!is_latin1) { 622 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 623 return SymbolTable::probe_unicode(base, length); 624 } else { 625 ResourceMark rm; 626 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 627 const char* base = UNICODE::as_utf8(position, length); 628 return SymbolTable::probe(base, length); 629 } 630 } 631 632 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 633 assert(value_equals(value, java_lang_String::value(java_string)), 634 "value must be same as java_lang_String::value(java_string)"); 635 int length = java_lang_String::length(java_string, value); 636 if (length == 0) { 637 return 0; 638 } 639 if (!java_lang_String::is_latin1(java_string)) { 640 return UNICODE::utf8_length(value->char_at_addr(0), length); 641 } else { 642 return UNICODE::utf8_length(value->byte_at_addr(0), length); 643 } 644 } 645 646 int java_lang_String::utf8_length(oop java_string) { 647 typeArrayOop value = java_lang_String::value(java_string); 648 return utf8_length(java_string, value); 649 } 650 651 char* java_lang_String::as_utf8_string(oop java_string) { 652 typeArrayOop value = java_lang_String::value(java_string); 653 int length = java_lang_String::length(java_string, value); 654 bool is_latin1 = java_lang_String::is_latin1(java_string); 655 if (!is_latin1) { 656 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 657 return UNICODE::as_utf8(position, length); 658 } else { 659 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 660 return UNICODE::as_utf8(position, length); 661 } 662 } 663 664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 665 assert(value_equals(value, java_lang_String::value(java_string)), 666 "value must be same as java_lang_String::value(java_string)"); 667 int length = java_lang_String::length(java_string, value); 668 bool is_latin1 = java_lang_String::is_latin1(java_string); 669 if (!is_latin1) { 670 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 671 return UNICODE::as_utf8(position, length, buf, buflen); 672 } else { 673 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 674 return UNICODE::as_utf8(position, length, buf, buflen); 675 } 676 } 677 678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 679 typeArrayOop value = java_lang_String::value(java_string); 680 return as_utf8_string(java_string, value, buf, buflen); 681 } 682 683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 684 typeArrayOop value = java_lang_String::value(java_string); 685 bool is_latin1 = java_lang_String::is_latin1(java_string); 686 assert(start + len <= java_lang_String::length(java_string), "just checking"); 687 if (!is_latin1) { 688 jchar* position = value->char_at_addr(start); 689 return UNICODE::as_utf8(position, len); 690 } else { 691 jbyte* position = value->byte_at_addr(start); 692 return UNICODE::as_utf8(position, len); 693 } 694 } 695 696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 697 assert(value_equals(value, java_lang_String::value(java_string)), 698 "value must be same as java_lang_String::value(java_string)"); 699 assert(start + len <= java_lang_String::length(java_string), "just checking"); 700 bool is_latin1 = java_lang_String::is_latin1(java_string); 701 if (!is_latin1) { 702 jchar* position = value->char_at_addr(start); 703 return UNICODE::as_utf8(position, len, buf, buflen); 704 } else { 705 jbyte* position = value->byte_at_addr(start); 706 return UNICODE::as_utf8(position, len, buf, buflen); 707 } 708 } 709 710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 711 assert(java_string->klass() == SystemDictionary::String_klass(), 712 "must be java_string"); 713 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 714 int length = java_lang_String::length(java_string, value); 715 if (length != len) { 716 return false; 717 } 718 bool is_latin1 = java_lang_String::is_latin1(java_string); 719 if (!is_latin1) { 720 for (int i = 0; i < len; i++) { 721 if (value->char_at(i) != chars[i]) { 722 return false; 723 } 724 } 725 } else { 726 for (int i = 0; i < len; i++) { 727 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 728 return false; 729 } 730 } 731 } 732 return true; 733 } 734 735 bool java_lang_String::equals(oop str1, oop str2) { 736 assert(str1->klass() == SystemDictionary::String_klass(), 737 "must be java String"); 738 assert(str2->klass() == SystemDictionary::String_klass(), 739 "must be java String"); 740 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 741 bool is_latin1 = java_lang_String::is_latin1(str1); 742 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 743 bool is_latin2 = java_lang_String::is_latin1(str2); 744 745 if (is_latin1 != is_latin2) { 746 // Strings with different coders are never equal. 747 return false; 748 } 749 return value_equals(value1, value2); 750 } 751 752 void java_lang_String::print(oop java_string, outputStream* st) { 753 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 754 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 755 756 if (value == NULL) { 757 // This can happen if, e.g., printing a String 758 // object before its initializer has been called 759 st->print("NULL"); 760 return; 761 } 762 763 int length = java_lang_String::length(java_string, value); 764 bool is_latin1 = java_lang_String::is_latin1(java_string); 765 766 st->print("\""); 767 for (int index = 0; index < length; index++) { 768 st->print("%c", (!is_latin1) ? value->char_at(index) : 769 ((jchar) value->byte_at(index)) & 0xff ); 770 } 771 st->print("\""); 772 } 773 774 775 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 776 assert(mirror.not_null() && fd->is_static(), "just checking"); 777 if (fd->has_initial_value()) { 778 BasicType t = fd->field_type(); 779 switch (t) { 780 case T_BYTE: 781 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 782 break; 783 case T_BOOLEAN: 784 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 785 break; 786 case T_CHAR: 787 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 788 break; 789 case T_SHORT: 790 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 791 break; 792 case T_INT: 793 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 794 break; 795 case T_FLOAT: 796 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 797 break; 798 case T_DOUBLE: 799 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 800 break; 801 case T_LONG: 802 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 803 break; 804 case T_OBJECT: 805 { 806 assert(fd->signature() == vmSymbols::string_signature(), 807 "just checking"); 808 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 809 // Archive the String field and update the pointer. 810 oop s = mirror()->obj_field(fd->offset()); 811 oop archived_s = StringTable::create_archived_string(s, CHECK); 812 mirror()->obj_field_put(fd->offset(), archived_s); 813 } else { 814 oop string = fd->string_initial_value(CHECK); 815 mirror()->obj_field_put(fd->offset(), string); 816 } 817 } 818 break; 819 default: 820 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 821 "Illegal ConstantValue attribute in class file"); 822 } 823 } 824 } 825 826 827 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 828 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 829 830 // If the offset was read from the shared archive, it was fixed up already 831 if (!k->is_shared()) { 832 if (k->is_instance_klass()) { 833 // During bootstrap, java.lang.Class wasn't loaded so static field 834 // offsets were computed without the size added it. Go back and 835 // update all the static field offsets to included the size. 836 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 837 if (fs.access_flags().is_static()) { 838 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 839 fs.set_offset(real_offset); 840 } 841 } 842 } 843 } 844 845 if (k->is_shared() && k->has_raw_archived_mirror()) { 846 if (HeapShared::open_archive_heap_region_mapped()) { 847 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 848 assert(present, "Missing archived mirror for %s", k->external_name()); 849 return; 850 } else { 851 k->set_java_mirror_handle(NULL); 852 k->clear_has_raw_archived_mirror(); 853 } 854 } 855 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 856 } 857 858 void java_lang_Class::initialize_mirror_fields(Klass* k, 859 Handle mirror, 860 Handle protection_domain, 861 TRAPS) { 862 // Allocate a simple java object for a lock. 863 // This needs to be a java object because during class initialization 864 // it can be held across a java call. 865 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 866 set_init_lock(mirror(), r); 867 868 // Set protection domain also 869 set_protection_domain(mirror(), protection_domain()); 870 871 // Initialize static fields 872 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 873 } 874 875 // Set the java.lang.Module module field in the java_lang_Class mirror 876 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 877 if (module.is_null()) { 878 // During startup, the module may be NULL only if java.base has not been defined yet. 879 // Put the class on the fixup_module_list to patch later when the java.lang.Module 880 // for java.base is known. But note that since we captured the NULL module another 881 // thread may have completed that initialization. 882 883 bool javabase_was_defined = false; 884 { 885 MutexLocker m1(Module_lock, THREAD); 886 // Keep list of classes needing java.base module fixup 887 if (!ModuleEntryTable::javabase_defined()) { 888 assert(k->java_mirror() != NULL, "Class's mirror is null"); 889 k->class_loader_data()->inc_keep_alive(); 890 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 891 fixup_module_field_list()->push(k); 892 } else { 893 javabase_was_defined = true; 894 } 895 } 896 897 // If java.base was already defined then patch this particular class with java.base. 898 if (javabase_was_defined) { 899 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 900 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 901 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 902 Handle javabase_handle(THREAD, javabase_entry->module()); 903 set_module(mirror(), javabase_handle()); 904 } 905 } else { 906 assert(Universe::is_module_initialized() || 907 (ModuleEntryTable::javabase_defined() && 908 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 909 "Incorrect java.lang.Module specification while creating mirror"); 910 set_module(mirror(), module()); 911 } 912 } 913 914 // Statically allocate fixup lists because they always get created. 915 void java_lang_Class::allocate_fixup_lists() { 916 GrowableArray<Klass*>* mirror_list = 917 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 918 set_fixup_mirror_list(mirror_list); 919 920 GrowableArray<Klass*>* module_list = 921 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 922 set_fixup_module_field_list(module_list); 923 } 924 925 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 926 Handle module, Handle protection_domain, TRAPS) { 927 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 928 assert(k->java_mirror() == NULL, "should only assign mirror once"); 929 930 // Use this moment of initialization to cache modifier_flags also, 931 // to support Class.getModifiers(). Instance classes recalculate 932 // the cached flags after the class file is parsed, but before the 933 // class is put into the system dictionary. 934 int computed_modifiers = k->compute_modifier_flags(CHECK); 935 k->set_modifier_flags(computed_modifiers); 936 // Class_klass has to be loaded because it is used to allocate 937 // the mirror. 938 if (SystemDictionary::Class_klass_loaded()) { 939 // Allocate mirror (java.lang.Class instance) 940 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 941 Handle mirror(THREAD, mirror_oop); 942 Handle comp_mirror; 943 944 // Setup indirection from mirror->klass 945 java_lang_Class::set_klass(mirror(), k); 946 947 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 948 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 949 950 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 951 952 // It might also have a component mirror. This mirror must already exist. 953 if (k->is_array_klass()) { 954 if (k->is_typeArray_klass()) { 955 BasicType type = TypeArrayKlass::cast(k)->element_type(); 956 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 957 } else { 958 assert(k->is_objArray_klass(), "Must be"); 959 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 960 assert(element_klass != NULL, "Must have an element klass"); 961 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 962 } 963 assert(comp_mirror() != NULL, "must have a mirror"); 964 965 // Two-way link between the array klass and its component mirror: 966 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 967 set_component_mirror(mirror(), comp_mirror()); 968 // See below for ordering dependencies between field array_klass in component mirror 969 // and java_mirror in this klass. 970 } else { 971 assert(k->is_instance_klass(), "Must be"); 972 973 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 974 if (HAS_PENDING_EXCEPTION) { 975 // If any of the fields throws an exception like OOM remove the klass field 976 // from the mirror so GC doesn't follow it after the klass has been deallocated. 977 // This mirror looks like a primitive type, which logically it is because it 978 // it represents no class. 979 java_lang_Class::set_klass(mirror(), NULL); 980 return; 981 } 982 } 983 984 // set the classLoader field in the java_lang_Class instance 985 assert(class_loader() == k->class_loader(), "should be same"); 986 set_class_loader(mirror(), class_loader()); 987 988 // Setup indirection from klass->mirror 989 // after any exceptions can happen during allocations. 990 k->set_java_mirror(mirror); 991 992 // Set the module field in the java_lang_Class instance. This must be done 993 // after the mirror is set. 994 set_mirror_module_field(k, mirror, module, THREAD); 995 996 if (comp_mirror() != NULL) { 997 // Set after k->java_mirror() is published, because compiled code running 998 // concurrently doesn't expect a k to have a null java_mirror. 999 release_set_array_klass(comp_mirror(), k); 1000 } 1001 } else { 1002 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1003 fixup_mirror_list()->push(k); 1004 } 1005 } 1006 1007 #if INCLUDE_CDS_JAVA_HEAP 1008 // Clears mirror fields. Static final fields with initial values are reloaded 1009 // from constant pool. The object identity hash is in the object header and is 1010 // not affected. 1011 class ResetMirrorField: public FieldClosure { 1012 private: 1013 Handle _m; 1014 1015 public: 1016 ResetMirrorField(Handle mirror) : _m(mirror) {} 1017 1018 void do_field(fieldDescriptor* fd) { 1019 assert(DumpSharedSpaces, "dump time only"); 1020 assert(_m.not_null(), "Mirror cannot be NULL"); 1021 1022 if (fd->is_static() && fd->has_initial_value()) { 1023 initialize_static_field(fd, _m, Thread::current()); 1024 return; 1025 } 1026 1027 BasicType ft = fd->field_type(); 1028 switch (ft) { 1029 case T_BYTE: 1030 _m()->byte_field_put(fd->offset(), 0); 1031 break; 1032 case T_CHAR: 1033 _m()->char_field_put(fd->offset(), 0); 1034 break; 1035 case T_DOUBLE: 1036 _m()->double_field_put(fd->offset(), 0); 1037 break; 1038 case T_FLOAT: 1039 _m()->float_field_put(fd->offset(), 0); 1040 break; 1041 case T_INT: 1042 _m()->int_field_put(fd->offset(), 0); 1043 break; 1044 case T_LONG: 1045 _m()->long_field_put(fd->offset(), 0); 1046 break; 1047 case T_SHORT: 1048 _m()->short_field_put(fd->offset(), 0); 1049 break; 1050 case T_BOOLEAN: 1051 _m()->bool_field_put(fd->offset(), false); 1052 break; 1053 case T_ARRAY: 1054 case T_OBJECT: { 1055 // It might be useful to cache the String field, but 1056 // for now just clear out any reference field 1057 oop o = _m()->obj_field(fd->offset()); 1058 _m()->obj_field_put(fd->offset(), NULL); 1059 break; 1060 } 1061 default: 1062 ShouldNotReachHere(); 1063 break; 1064 } 1065 } 1066 }; 1067 1068 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1069 assert(HeapShared::is_heap_object_archiving_allowed(), 1070 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1071 1072 for (int t = 0; t <= T_VOID; t++) { 1073 oop m = Universe::_mirrors[t]; 1074 if (m != NULL) { 1075 // Update the field at _array_klass_offset to point to the relocated array klass. 1076 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1077 assert(archived_m != NULL, "sanity"); 1078 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1079 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1080 if (ak != NULL) { 1081 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true); 1082 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1083 } 1084 1085 // Clear the fields. Just to be safe 1086 Klass *k = m->klass(); 1087 Handle archived_mirror_h(THREAD, archived_m); 1088 ResetMirrorField reset(archived_mirror_h); 1089 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1090 1091 log_trace(cds, heap, mirror)( 1092 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1093 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1094 1095 Universe::_mirrors[t] = archived_m; 1096 } 1097 } 1098 1099 assert(Universe::_mirrors[T_INT] != NULL && 1100 Universe::_mirrors[T_FLOAT] != NULL && 1101 Universe::_mirrors[T_DOUBLE] != NULL && 1102 Universe::_mirrors[T_BYTE] != NULL && 1103 Universe::_mirrors[T_BOOLEAN] != NULL && 1104 Universe::_mirrors[T_CHAR] != NULL && 1105 Universe::_mirrors[T_LONG] != NULL && 1106 Universe::_mirrors[T_SHORT] != NULL && 1107 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1108 1109 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1110 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1111 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1112 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1113 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1114 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1115 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1116 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1117 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1118 } 1119 1120 // 1121 // After the mirror object is successfully archived, the archived 1122 // klass is set with _has_archived_raw_mirror flag. 1123 // 1124 // The _has_archived_raw_mirror flag is cleared at runtime when the 1125 // archived mirror is restored. If archived java heap data cannot 1126 // be used at runtime, new mirror object is created for the shared 1127 // class. The _has_archived_raw_mirror is cleared also during the process. 1128 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1129 assert(HeapShared::is_heap_object_archiving_allowed(), 1130 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1131 1132 // Mirror is already archived 1133 if (k->has_raw_archived_mirror()) { 1134 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1135 return k->archived_java_mirror_raw(); 1136 } 1137 1138 // No mirror 1139 oop mirror = k->java_mirror(); 1140 if (mirror == NULL) { 1141 return NULL; 1142 } 1143 1144 if (k->is_instance_klass()) { 1145 InstanceKlass *ik = InstanceKlass::cast(k); 1146 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1147 1148 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1149 ik->is_shared_app_class())) { 1150 // Archiving mirror for classes from non-builtin loaders is not 1151 // supported. Clear the _java_mirror within the archived class. 1152 k->set_java_mirror_handle(NULL); 1153 return NULL; 1154 } 1155 } 1156 1157 // Now start archiving the mirror object 1158 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1159 if (archived_mirror == NULL) { 1160 return NULL; 1161 } 1162 1163 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1164 if (archived_mirror == NULL) { 1165 return NULL; 1166 } 1167 1168 k->set_archived_java_mirror_raw(archived_mirror); 1169 1170 k->set_has_raw_archived_mirror(); 1171 1172 ResourceMark rm; 1173 log_trace(cds, heap, mirror)( 1174 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1175 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1176 1177 return archived_mirror; 1178 } 1179 1180 // The process is based on create_mirror(). 1181 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1182 oop archived_mirror, 1183 Thread *THREAD) { 1184 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1185 // to archived metadata and objects below. 1186 Klass *c = archived_mirror->klass(); 1187 Handle archived_mirror_h(THREAD, archived_mirror); 1188 ResetMirrorField reset(archived_mirror_h); 1189 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1190 1191 if (k->is_array_klass()) { 1192 oop archived_comp_mirror; 1193 if (k->is_typeArray_klass()) { 1194 // The primitive type mirrors are already archived. Get the archived mirror. 1195 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1196 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1197 assert(archived_comp_mirror != NULL, "Must be"); 1198 } else { 1199 assert(k->is_objArray_klass(), "Must be"); 1200 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1201 assert(element_klass != NULL, "Must have an element klass"); 1202 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1203 if (archived_comp_mirror == NULL) { 1204 return NULL; 1205 } 1206 } 1207 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1208 } else { 1209 assert(k->is_instance_klass(), "Must be"); 1210 1211 // Reset local static fields in the mirror 1212 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1213 1214 java_lang_Class:set_init_lock(archived_mirror, NULL); 1215 1216 set_protection_domain(archived_mirror, NULL); 1217 } 1218 1219 // clear class loader and mirror_module_field 1220 set_class_loader(archived_mirror, NULL); 1221 set_module(archived_mirror, NULL); 1222 1223 // The archived mirror's field at _klass_offset is still pointing to the original 1224 // klass. Updated the field in the archived mirror to point to the relocated 1225 // klass in the archive. 1226 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true); 1227 log_debug(cds, heap, mirror)( 1228 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1229 p2i(as_Klass(mirror)), p2i(reloc_k)); 1230 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1231 1232 // The field at _array_klass_offset is pointing to the original one dimension 1233 // higher array klass if exists. Relocate the pointer. 1234 Klass *arr = array_klass_acquire(mirror); 1235 if (arr != NULL) { 1236 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true); 1237 log_debug(cds, heap, mirror)( 1238 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1239 p2i(arr), p2i(reloc_arr)); 1240 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1241 } 1242 return archived_mirror; 1243 } 1244 1245 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) { 1246 if (MetaspaceShared::relocation_delta() != 0) { 1247 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class"); 1248 1249 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1250 if (ak != NULL) { 1251 archived_mirror->metadata_field_put(_array_klass_offset, 1252 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1253 } 1254 } 1255 } 1256 1257 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) { 1258 if (MetaspaceShared::relocation_delta() != 0) { 1259 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset)); 1260 archived_mirror->metadata_field_put(_klass_offset, 1261 (Klass*)(address(k) + MetaspaceShared::relocation_delta())); 1262 1263 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset)); 1264 if (ak != NULL) { 1265 archived_mirror->metadata_field_put(_array_klass_offset, 1266 (Klass*)(address(ak) + MetaspaceShared::relocation_delta())); 1267 } 1268 } 1269 } 1270 1271 1272 // Returns true if the mirror is updated, false if no archived mirror 1273 // data is present. After the archived mirror object is restored, the 1274 // shared klass' _has_raw_archived_mirror flag is cleared. 1275 bool java_lang_Class::restore_archived_mirror(Klass *k, 1276 Handle class_loader, Handle module, 1277 Handle protection_domain, TRAPS) { 1278 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1279 // see more details in SystemDictionary::resolve_well_known_classes(). 1280 if (!SystemDictionary::Class_klass_loaded()) { 1281 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1282 fixup_mirror_list()->push(k); 1283 return true; 1284 } 1285 1286 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1287 if (m == NULL) { 1288 return false; 1289 } 1290 1291 // mirror is archived, restore 1292 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1293 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1294 update_archived_mirror_native_pointers(m); 1295 assert(as_Klass(m) == k, "must be"); 1296 Handle mirror(THREAD, m); 1297 1298 if (!k->is_array_klass()) { 1299 // - local static final fields with initial values were initialized at dump time 1300 1301 // create the init_lock 1302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1303 set_init_lock(mirror(), r); 1304 1305 if (protection_domain.not_null()) { 1306 set_protection_domain(mirror(), protection_domain()); 1307 } 1308 } 1309 1310 assert(class_loader() == k->class_loader(), "should be same"); 1311 if (class_loader.not_null()) { 1312 set_class_loader(mirror(), class_loader()); 1313 } 1314 1315 k->set_java_mirror(mirror); 1316 k->clear_has_raw_archived_mirror(); 1317 1318 set_mirror_module_field(k, mirror, module, THREAD); 1319 1320 if (log_is_enabled(Trace, cds, heap, mirror)) { 1321 ResourceMark rm(THREAD); 1322 log_trace(cds, heap, mirror)( 1323 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1324 } 1325 1326 return true; 1327 } 1328 #endif // INCLUDE_CDS_JAVA_HEAP 1329 1330 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1331 assert(_module_offset != 0, "must have been computed already"); 1332 java_lang_Class::set_module(k->java_mirror(), module()); 1333 } 1334 1335 int java_lang_Class::oop_size(oop java_class) { 1336 assert(_oop_size_offset != 0, "must be set"); 1337 int size = java_class->int_field(_oop_size_offset); 1338 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1339 return size; 1340 } 1341 1342 1343 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1344 assert(_oop_size_offset != 0, "must be set"); 1345 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1346 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1347 } 1348 1349 int java_lang_Class::static_oop_field_count(oop java_class) { 1350 assert(_static_oop_field_count_offset != 0, "must be set"); 1351 return java_class->int_field(_static_oop_field_count_offset); 1352 } 1353 1354 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1355 assert(_static_oop_field_count_offset != 0, "must be set"); 1356 return java_class->int_field_raw(_static_oop_field_count_offset); 1357 } 1358 1359 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1360 assert(_static_oop_field_count_offset != 0, "must be set"); 1361 java_class->int_field_put(_static_oop_field_count_offset, size); 1362 } 1363 1364 oop java_lang_Class::protection_domain(oop java_class) { 1365 assert(_protection_domain_offset != 0, "must be set"); 1366 return java_class->obj_field(_protection_domain_offset); 1367 } 1368 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1369 assert(_protection_domain_offset != 0, "must be set"); 1370 java_class->obj_field_put(_protection_domain_offset, pd); 1371 } 1372 1373 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1374 assert(_component_mirror_offset != 0, "must be set"); 1375 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1376 } 1377 oop java_lang_Class::component_mirror(oop java_class) { 1378 assert(_component_mirror_offset != 0, "must be set"); 1379 return java_class->obj_field(_component_mirror_offset); 1380 } 1381 1382 oop java_lang_Class::init_lock(oop java_class) { 1383 assert(_init_lock_offset != 0, "must be set"); 1384 return java_class->obj_field(_init_lock_offset); 1385 } 1386 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1387 assert(_init_lock_offset != 0, "must be set"); 1388 java_class->obj_field_put(_init_lock_offset, init_lock); 1389 } 1390 1391 objArrayOop java_lang_Class::signers(oop java_class) { 1392 assert(_signers_offset != 0, "must be set"); 1393 return (objArrayOop)java_class->obj_field(_signers_offset); 1394 } 1395 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1396 assert(_signers_offset != 0, "must be set"); 1397 java_class->obj_field_put(_signers_offset, (oop)signers); 1398 } 1399 1400 1401 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1402 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1403 if (_class_loader_offset != 0) { 1404 java_class->obj_field_put(_class_loader_offset, loader); 1405 } 1406 } 1407 1408 oop java_lang_Class::class_loader(oop java_class) { 1409 assert(_class_loader_offset != 0, "must be set"); 1410 return java_class->obj_field(_class_loader_offset); 1411 } 1412 1413 oop java_lang_Class::module(oop java_class) { 1414 assert(_module_offset != 0, "must be set"); 1415 return java_class->obj_field(_module_offset); 1416 } 1417 1418 void java_lang_Class::set_module(oop java_class, oop module) { 1419 assert(_module_offset != 0, "must be set"); 1420 java_class->obj_field_put(_module_offset, module); 1421 } 1422 1423 oop java_lang_Class::name(Handle java_class, TRAPS) { 1424 assert(_name_offset != 0, "must be set"); 1425 oop o = java_class->obj_field(_name_offset); 1426 if (o == NULL) { 1427 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1428 java_class->obj_field_put(_name_offset, o); 1429 } 1430 return o; 1431 } 1432 1433 oop java_lang_Class::source_file(oop java_class) { 1434 assert(_source_file_offset != 0, "must be set"); 1435 return java_class->obj_field(_source_file_offset); 1436 } 1437 1438 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1439 assert(_source_file_offset != 0, "must be set"); 1440 java_class->obj_field_put(_source_file_offset, source_file); 1441 } 1442 1443 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1444 // This should be improved by adding a field at the Java level or by 1445 // introducing a new VM klass (see comment in ClassFileParser) 1446 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1447 if (type != T_VOID) { 1448 Klass* aklass = Universe::typeArrayKlassObj(type); 1449 assert(aklass != NULL, "correct bootstrap"); 1450 release_set_array_klass(java_class, aklass); 1451 } 1452 #ifdef ASSERT 1453 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1454 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1455 #endif 1456 return java_class; 1457 } 1458 1459 1460 Klass* java_lang_Class::as_Klass(oop java_class) { 1461 //%note memory_2 1462 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1463 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1464 assert(k == NULL || k->is_klass(), "type check"); 1465 return k; 1466 } 1467 1468 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1469 //%note memory_2 1470 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1471 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1472 assert(k == NULL || k->is_klass(), "type check"); 1473 return k; 1474 } 1475 1476 1477 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1478 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1479 java_class->metadata_field_put(_klass_offset, klass); 1480 } 1481 1482 1483 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1484 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1485 Symbol* name = NULL; 1486 bool is_instance = false; 1487 if (is_primitive(java_class)) { 1488 name = vmSymbols::type_signature(primitive_type(java_class)); 1489 } else { 1490 Klass* k = as_Klass(java_class); 1491 is_instance = k->is_instance_klass(); 1492 name = k->name(); 1493 } 1494 if (name == NULL) { 1495 st->print("<null>"); 1496 return; 1497 } 1498 if (is_instance) st->print("L"); 1499 st->write((char*) name->base(), (int) name->utf8_length()); 1500 if (is_instance) st->print(";"); 1501 } 1502 1503 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1504 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1505 Symbol* name; 1506 if (is_primitive(java_class)) { 1507 name = vmSymbols::type_signature(primitive_type(java_class)); 1508 // Because this can create a new symbol, the caller has to decrement 1509 // the refcount, so make adjustment here and below for symbols returned 1510 // that are not created or incremented due to a successful lookup. 1511 name->increment_refcount(); 1512 } else { 1513 Klass* k = as_Klass(java_class); 1514 if (!k->is_instance_klass()) { 1515 name = k->name(); 1516 name->increment_refcount(); 1517 } else { 1518 ResourceMark rm; 1519 const char* sigstr = k->signature_name(); 1520 int siglen = (int) strlen(sigstr); 1521 if (!intern_if_not_found) { 1522 name = SymbolTable::probe(sigstr, siglen); 1523 } else { 1524 name = SymbolTable::new_symbol(sigstr, siglen); 1525 } 1526 } 1527 } 1528 return name; 1529 } 1530 1531 // Returns the Java name for this Java mirror (Resource allocated) 1532 // See Klass::external_name(). 1533 // For primitive type Java mirrors, its type name is returned. 1534 const char* java_lang_Class::as_external_name(oop java_class) { 1535 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1536 const char* name = NULL; 1537 if (is_primitive(java_class)) { 1538 name = type2name(primitive_type(java_class)); 1539 } else { 1540 name = as_Klass(java_class)->external_name(); 1541 } 1542 if (name == NULL) { 1543 name = "<null>"; 1544 } 1545 return name; 1546 } 1547 1548 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1549 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1550 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1551 return k; 1552 } 1553 1554 1555 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1556 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1557 java_class->release_metadata_field_put(_array_klass_offset, klass); 1558 } 1559 1560 1561 BasicType java_lang_Class::primitive_type(oop java_class) { 1562 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1563 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1564 BasicType type = T_VOID; 1565 if (ak != NULL) { 1566 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1567 type = ArrayKlass::cast(ak)->element_type(); 1568 } else { 1569 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1570 } 1571 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1572 return type; 1573 } 1574 1575 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1576 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1577 if (is_primitive(java_class)) { 1578 if (reference_klass != NULL) 1579 (*reference_klass) = NULL; 1580 return primitive_type(java_class); 1581 } else { 1582 if (reference_klass != NULL) 1583 (*reference_klass) = as_Klass(java_class); 1584 return T_OBJECT; 1585 } 1586 } 1587 1588 1589 oop java_lang_Class::primitive_mirror(BasicType t) { 1590 oop mirror = Universe::java_mirror(t); 1591 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1592 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1593 return mirror; 1594 } 1595 1596 bool java_lang_Class::offsets_computed = false; 1597 int java_lang_Class::classRedefinedCount_offset = -1; 1598 1599 #define CLASS_FIELDS_DO(macro) \ 1600 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1601 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1602 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1603 macro(_module_offset, k, "module", module_signature, false); \ 1604 macro(_name_offset, k, "name", string_signature, false); \ 1605 1606 void java_lang_Class::compute_offsets() { 1607 if (offsets_computed) { 1608 return; 1609 } 1610 1611 offsets_computed = true; 1612 1613 InstanceKlass* k = SystemDictionary::Class_klass(); 1614 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1615 1616 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1617 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1618 // GC treats them the same. 1619 _init_lock_offset = _component_mirror_offset; 1620 1621 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1622 } 1623 1624 #if INCLUDE_CDS 1625 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1626 f->do_bool(&offsets_computed); 1627 f->do_u4((u4*)&_init_lock_offset); 1628 1629 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1630 1631 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1632 } 1633 #endif 1634 1635 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1636 if (classRedefinedCount_offset == -1) { 1637 // If we don't have an offset for it then just return -1 as a marker. 1638 return -1; 1639 } 1640 1641 return the_class_mirror->int_field(classRedefinedCount_offset); 1642 } 1643 1644 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1645 if (classRedefinedCount_offset == -1) { 1646 // If we don't have an offset for it then nothing to set. 1647 return; 1648 } 1649 1650 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1651 } 1652 1653 1654 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1655 // platform thread structure, and a eetop offset which was used for thread 1656 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1657 // merged, so in the HotSpot VM we just use the eetop field for the thread 1658 // instead of the privateInfo_offset. 1659 // 1660 // Note: The stackSize field is only present starting in 1.4. 1661 1662 int java_lang_Thread::_name_offset = 0; 1663 int java_lang_Thread::_group_offset = 0; 1664 int java_lang_Thread::_contextClassLoader_offset = 0; 1665 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1666 int java_lang_Thread::_priority_offset = 0; 1667 int java_lang_Thread::_eetop_offset = 0; 1668 int java_lang_Thread::_interrupted_offset = 0; 1669 int java_lang_Thread::_daemon_offset = 0; 1670 int java_lang_Thread::_stillborn_offset = 0; 1671 int java_lang_Thread::_stackSize_offset = 0; 1672 int java_lang_Thread::_tid_offset = 0; 1673 int java_lang_Thread::_thread_status_offset = 0; 1674 int java_lang_Thread::_park_blocker_offset = 0; 1675 1676 #define THREAD_FIELDS_DO(macro) \ 1677 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1678 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1679 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1680 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1681 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1682 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1683 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1684 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1685 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1686 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1687 macro(_tid_offset, k, "tid", long_signature, false); \ 1688 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1689 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false) 1690 1691 void java_lang_Thread::compute_offsets() { 1692 assert(_group_offset == 0, "offsets should be initialized only once"); 1693 1694 InstanceKlass* k = SystemDictionary::Thread_klass(); 1695 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1696 } 1697 1698 #if INCLUDE_CDS 1699 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1700 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1701 } 1702 #endif 1703 1704 JavaThread* java_lang_Thread::thread(oop java_thread) { 1705 return (JavaThread*)java_thread->address_field(_eetop_offset); 1706 } 1707 1708 1709 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1710 java_thread->address_field_put(_eetop_offset, (address)thread); 1711 } 1712 1713 bool java_lang_Thread::interrupted(oop java_thread) { 1714 // Make sure the caller can safely access oops. 1715 assert(Thread::current()->is_VM_thread() || 1716 (JavaThread::current()->thread_state() != _thread_blocked && 1717 JavaThread::current()->thread_state() != _thread_in_native), 1718 "Unsafe access to oop"); 1719 return java_thread->bool_field_volatile(_interrupted_offset); 1720 } 1721 1722 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1723 // Make sure the caller can safely access oops. 1724 assert(Thread::current()->is_VM_thread() || 1725 (JavaThread::current()->thread_state() != _thread_blocked && 1726 JavaThread::current()->thread_state() != _thread_in_native), 1727 "Unsafe access to oop"); 1728 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1729 } 1730 1731 1732 oop java_lang_Thread::name(oop java_thread) { 1733 return java_thread->obj_field(_name_offset); 1734 } 1735 1736 1737 void java_lang_Thread::set_name(oop java_thread, oop name) { 1738 java_thread->obj_field_put(_name_offset, name); 1739 } 1740 1741 1742 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1743 return (ThreadPriority)java_thread->int_field(_priority_offset); 1744 } 1745 1746 1747 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1748 java_thread->int_field_put(_priority_offset, priority); 1749 } 1750 1751 1752 oop java_lang_Thread::threadGroup(oop java_thread) { 1753 return java_thread->obj_field(_group_offset); 1754 } 1755 1756 1757 bool java_lang_Thread::is_stillborn(oop java_thread) { 1758 return java_thread->bool_field(_stillborn_offset) != 0; 1759 } 1760 1761 1762 // We never have reason to turn the stillborn bit off 1763 void java_lang_Thread::set_stillborn(oop java_thread) { 1764 java_thread->bool_field_put(_stillborn_offset, true); 1765 } 1766 1767 1768 bool java_lang_Thread::is_alive(oop java_thread) { 1769 JavaThread* thr = java_lang_Thread::thread(java_thread); 1770 return (thr != NULL); 1771 } 1772 1773 1774 bool java_lang_Thread::is_daemon(oop java_thread) { 1775 return java_thread->bool_field(_daemon_offset) != 0; 1776 } 1777 1778 1779 void java_lang_Thread::set_daemon(oop java_thread) { 1780 java_thread->bool_field_put(_daemon_offset, true); 1781 } 1782 1783 oop java_lang_Thread::context_class_loader(oop java_thread) { 1784 return java_thread->obj_field(_contextClassLoader_offset); 1785 } 1786 1787 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1788 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1789 } 1790 1791 1792 jlong java_lang_Thread::stackSize(oop java_thread) { 1793 return java_thread->long_field(_stackSize_offset); 1794 } 1795 1796 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1797 void java_lang_Thread::set_thread_status(oop java_thread, 1798 java_lang_Thread::ThreadStatus status) { 1799 java_thread->int_field_put(_thread_status_offset, status); 1800 } 1801 1802 // Read thread status value from threadStatus field in java.lang.Thread java class. 1803 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1804 // Make sure the caller is operating on behalf of the VM or is 1805 // running VM code (state == _thread_in_vm). 1806 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1807 JavaThread::current()->thread_state() == _thread_in_vm, 1808 "Java Thread is not running in vm"); 1809 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1810 } 1811 1812 1813 jlong java_lang_Thread::thread_id(oop java_thread) { 1814 return java_thread->long_field(_tid_offset); 1815 } 1816 1817 oop java_lang_Thread::park_blocker(oop java_thread) { 1818 return java_thread->obj_field(_park_blocker_offset); 1819 } 1820 1821 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1822 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1823 switch (status) { 1824 case NEW : return "NEW"; 1825 case RUNNABLE : return "RUNNABLE"; 1826 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1827 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1828 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1829 case PARKED : return "WAITING (parking)"; 1830 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1831 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1832 case TERMINATED : return "TERMINATED"; 1833 default : return "UNKNOWN"; 1834 }; 1835 } 1836 int java_lang_ThreadGroup::_parent_offset = 0; 1837 int java_lang_ThreadGroup::_name_offset = 0; 1838 int java_lang_ThreadGroup::_threads_offset = 0; 1839 int java_lang_ThreadGroup::_groups_offset = 0; 1840 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1841 int java_lang_ThreadGroup::_destroyed_offset = 0; 1842 int java_lang_ThreadGroup::_daemon_offset = 0; 1843 int java_lang_ThreadGroup::_nthreads_offset = 0; 1844 int java_lang_ThreadGroup::_ngroups_offset = 0; 1845 1846 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1847 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1848 return java_thread_group->obj_field(_parent_offset); 1849 } 1850 1851 // ("name as oop" accessor is not necessary) 1852 1853 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1854 oop name = java_thread_group->obj_field(_name_offset); 1855 // ThreadGroup.name can be null 1856 if (name != NULL) { 1857 return java_lang_String::as_utf8_string(name); 1858 } 1859 return NULL; 1860 } 1861 1862 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1863 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1864 return java_thread_group->int_field(_nthreads_offset); 1865 } 1866 1867 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1868 oop threads = java_thread_group->obj_field(_threads_offset); 1869 assert(threads != NULL, "threadgroups should have threads"); 1870 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1871 return objArrayOop(threads); 1872 } 1873 1874 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1875 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1876 return java_thread_group->int_field(_ngroups_offset); 1877 } 1878 1879 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1880 oop groups = java_thread_group->obj_field(_groups_offset); 1881 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1882 return objArrayOop(groups); 1883 } 1884 1885 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1886 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1887 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1888 } 1889 1890 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1891 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1892 return java_thread_group->bool_field(_destroyed_offset) != 0; 1893 } 1894 1895 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1896 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1897 return java_thread_group->bool_field(_daemon_offset) != 0; 1898 } 1899 1900 #define THREADGROUP_FIELDS_DO(macro) \ 1901 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1902 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1903 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1904 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1905 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1906 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1907 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1908 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1909 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1910 1911 void java_lang_ThreadGroup::compute_offsets() { 1912 assert(_parent_offset == 0, "offsets should be initialized only once"); 1913 1914 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1915 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1916 } 1917 1918 #if INCLUDE_CDS 1919 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1920 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1921 } 1922 #endif 1923 1924 #define THROWABLE_FIELDS_DO(macro) \ 1925 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1926 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1927 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1928 macro(depth_offset, k, "depth", int_signature, false); \ 1929 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1930 1931 void java_lang_Throwable::compute_offsets() { 1932 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1933 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1934 } 1935 1936 #if INCLUDE_CDS 1937 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1938 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1939 } 1940 #endif 1941 1942 oop java_lang_Throwable::unassigned_stacktrace() { 1943 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1944 oop base = ik->static_field_base_raw(); 1945 return base->obj_field(static_unassigned_stacktrace_offset); 1946 } 1947 1948 oop java_lang_Throwable::backtrace(oop throwable) { 1949 return throwable->obj_field_acquire(backtrace_offset); 1950 } 1951 1952 1953 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1954 throwable->release_obj_field_put(backtrace_offset, value); 1955 } 1956 1957 int java_lang_Throwable::depth(oop throwable) { 1958 return throwable->int_field(depth_offset); 1959 } 1960 1961 void java_lang_Throwable::set_depth(oop throwable, int value) { 1962 throwable->int_field_put(depth_offset, value); 1963 } 1964 1965 oop java_lang_Throwable::message(oop throwable) { 1966 return throwable->obj_field(detailMessage_offset); 1967 } 1968 1969 1970 // Return Symbol for detailed_message or NULL 1971 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1972 PRESERVE_EXCEPTION_MARK; // Keep original exception 1973 oop detailed_message = java_lang_Throwable::message(throwable); 1974 if (detailed_message != NULL) { 1975 return java_lang_String::as_symbol(detailed_message); 1976 } 1977 return NULL; 1978 } 1979 1980 void java_lang_Throwable::set_message(oop throwable, oop value) { 1981 throwable->obj_field_put(detailMessage_offset, value); 1982 } 1983 1984 1985 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1986 throwable->obj_field_put(stackTrace_offset, st_element_array); 1987 } 1988 1989 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1990 set_stacktrace(throwable, NULL); 1991 } 1992 1993 1994 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1995 ResourceMark rm; 1996 Klass* k = throwable->klass(); 1997 assert(k != NULL, "just checking"); 1998 st->print("%s", k->external_name()); 1999 oop msg = message(throwable); 2000 if (msg != NULL) { 2001 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2002 } 2003 } 2004 2005 // After this many redefines, the stack trace is unreliable. 2006 const int MAX_VERSION = USHRT_MAX; 2007 2008 static inline bool version_matches(Method* method, int version) { 2009 assert(version < MAX_VERSION, "version is too big"); 2010 return method != NULL && (method->constants()->version() == version); 2011 } 2012 2013 // This class provides a simple wrapper over the internal structure of 2014 // exception backtrace to insulate users of the backtrace from needing 2015 // to know what it looks like. 2016 // The code of this class is not GC safe. Allocations can only happen 2017 // in expand(). 2018 class BacktraceBuilder: public StackObj { 2019 friend class BacktraceIterator; 2020 private: 2021 Handle _backtrace; 2022 objArrayOop _head; 2023 typeArrayOop _methods; 2024 typeArrayOop _bcis; 2025 objArrayOop _mirrors; 2026 typeArrayOop _names; // Needed to insulate method name against redefinition. 2027 // This is set to a java.lang.Boolean(true) if the top frame 2028 // of the backtrace is omitted because it shall be hidden. 2029 // Else it is null. 2030 oop _has_hidden_top_frame; 2031 int _index; 2032 NoSafepointVerifier _nsv; 2033 2034 enum { 2035 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2036 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2037 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2038 trace_names_offset = java_lang_Throwable::trace_names_offset, 2039 trace_next_offset = java_lang_Throwable::trace_next_offset, 2040 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2041 trace_size = java_lang_Throwable::trace_size, 2042 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2043 }; 2044 2045 // get info out of chunks 2046 static typeArrayOop get_methods(objArrayHandle chunk) { 2047 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2048 assert(methods != NULL, "method array should be initialized in backtrace"); 2049 return methods; 2050 } 2051 static typeArrayOop get_bcis(objArrayHandle chunk) { 2052 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2053 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2054 return bcis; 2055 } 2056 static objArrayOop get_mirrors(objArrayHandle chunk) { 2057 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2058 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2059 return mirrors; 2060 } 2061 static typeArrayOop get_names(objArrayHandle chunk) { 2062 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2063 assert(names != NULL, "names array should be initialized in backtrace"); 2064 return names; 2065 } 2066 static oop get_has_hidden_top_frame(objArrayHandle chunk) { 2067 oop hidden = chunk->obj_at(trace_hidden_offset); 2068 return hidden; 2069 } 2070 2071 public: 2072 2073 // constructor for new backtrace 2074 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) { 2075 expand(CHECK); 2076 _backtrace = Handle(THREAD, _head); 2077 _index = 0; 2078 } 2079 2080 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2081 _methods = get_methods(backtrace); 2082 _bcis = get_bcis(backtrace); 2083 _mirrors = get_mirrors(backtrace); 2084 _names = get_names(backtrace); 2085 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace); 2086 assert(_methods->length() == _bcis->length() && 2087 _methods->length() == _mirrors->length() && 2088 _mirrors->length() == _names->length(), 2089 "method and source information arrays should match"); 2090 2091 // head is the preallocated backtrace 2092 _head = backtrace(); 2093 _backtrace = Handle(thread, _head); 2094 _index = 0; 2095 } 2096 2097 void expand(TRAPS) { 2098 objArrayHandle old_head(THREAD, _head); 2099 PauseNoSafepointVerifier pnsv(&_nsv); 2100 2101 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2102 objArrayHandle new_head(THREAD, head); 2103 2104 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2105 typeArrayHandle new_methods(THREAD, methods); 2106 2107 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2108 typeArrayHandle new_bcis(THREAD, bcis); 2109 2110 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2111 objArrayHandle new_mirrors(THREAD, mirrors); 2112 2113 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2114 typeArrayHandle new_names(THREAD, names); 2115 2116 if (!old_head.is_null()) { 2117 old_head->obj_at_put(trace_next_offset, new_head()); 2118 } 2119 new_head->obj_at_put(trace_methods_offset, new_methods()); 2120 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2121 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2122 new_head->obj_at_put(trace_names_offset, new_names()); 2123 new_head->obj_at_put(trace_hidden_offset, NULL); 2124 2125 _head = new_head(); 2126 _methods = new_methods(); 2127 _bcis = new_bcis(); 2128 _mirrors = new_mirrors(); 2129 _names = new_names(); 2130 _index = 0; 2131 } 2132 2133 oop backtrace() { 2134 return _backtrace(); 2135 } 2136 2137 inline void push(Method* method, int bci, TRAPS) { 2138 // Smear the -1 bci to 0 since the array only holds unsigned 2139 // shorts. The later line number lookup would just smear the -1 2140 // to a 0 even if it could be recorded. 2141 if (bci == SynchronizationEntryBCI) bci = 0; 2142 2143 if (_index >= trace_chunk_size) { 2144 methodHandle mhandle(THREAD, method); 2145 expand(CHECK); 2146 method = mhandle(); 2147 } 2148 2149 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2150 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2151 2152 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2153 // klass owning the symbols alive so their refcounts aren't decremented. 2154 Symbol* name = method->name(); 2155 _names->symbol_at_put(_index, name); 2156 2157 // We need to save the mirrors in the backtrace to keep the class 2158 // from being unloaded while we still have this stack trace. 2159 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2160 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2161 _index++; 2162 } 2163 2164 void set_has_hidden_top_frame(TRAPS) { 2165 if (_has_hidden_top_frame == NULL) { 2166 // It would be nice to add java/lang/Boolean::TRUE here 2167 // to indicate that this backtrace has a hidden top frame. 2168 // But this code is used before TRUE is allocated. 2169 // Therefor let's just use an arbitrary legal oop 2170 // available right here. We only test for != null 2171 // anyways. _methods is a short[]. 2172 assert(_methods != NULL, "we need a legal oop"); 2173 _has_hidden_top_frame = _methods; 2174 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame); 2175 } 2176 } 2177 2178 }; 2179 2180 struct BacktraceElement : public StackObj { 2181 int _method_id; 2182 int _bci; 2183 int _version; 2184 Symbol* _name; 2185 Handle _mirror; 2186 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2187 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2188 }; 2189 2190 class BacktraceIterator : public StackObj { 2191 int _index; 2192 objArrayHandle _result; 2193 objArrayHandle _mirrors; 2194 typeArrayHandle _methods; 2195 typeArrayHandle _bcis; 2196 typeArrayHandle _names; 2197 2198 void init(objArrayHandle result, Thread* thread) { 2199 // Get method id, bci, version and mirror from chunk 2200 _result = result; 2201 if (_result.not_null()) { 2202 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2203 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2204 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2205 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2206 _index = 0; 2207 } 2208 } 2209 public: 2210 BacktraceIterator(objArrayHandle result, Thread* thread) { 2211 init(result, thread); 2212 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2213 } 2214 2215 BacktraceElement next(Thread* thread) { 2216 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2217 _methods->ushort_at(_index), 2218 Backtrace::version_at(_bcis->int_at(_index)), 2219 Backtrace::bci_at(_bcis->int_at(_index)), 2220 _names->symbol_at(_index)); 2221 _index++; 2222 2223 if (_index >= java_lang_Throwable::trace_chunk_size) { 2224 int next_offset = java_lang_Throwable::trace_next_offset; 2225 // Get next chunk 2226 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2227 init(result, thread); 2228 } 2229 return e; 2230 } 2231 2232 bool repeat() { 2233 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2234 } 2235 }; 2236 2237 2238 // Print stack trace element to resource allocated buffer 2239 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2240 int version, int bci, Symbol* name) { 2241 ResourceMark rm; 2242 2243 // Get strings and string lengths 2244 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2245 const char* klass_name = holder->external_name(); 2246 int buf_len = (int)strlen(klass_name); 2247 2248 char* method_name = name->as_C_string(); 2249 buf_len += (int)strlen(method_name); 2250 2251 char* source_file_name = NULL; 2252 Symbol* source = Backtrace::get_source_file_name(holder, version); 2253 if (source != NULL) { 2254 source_file_name = source->as_C_string(); 2255 buf_len += (int)strlen(source_file_name); 2256 } 2257 2258 char *module_name = NULL, *module_version = NULL; 2259 ModuleEntry* module = holder->module(); 2260 if (module->is_named()) { 2261 module_name = module->name()->as_C_string(); 2262 buf_len += (int)strlen(module_name); 2263 if (module->version() != NULL) { 2264 module_version = module->version()->as_C_string(); 2265 buf_len += (int)strlen(module_version); 2266 } 2267 } 2268 2269 // Allocate temporary buffer with extra space for formatting and line number 2270 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2271 2272 // Print stack trace line in buffer 2273 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2274 2275 // Print module information 2276 if (module_name != NULL) { 2277 if (module_version != NULL) { 2278 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2279 } else { 2280 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2281 } 2282 } 2283 2284 // The method can be NULL if the requested class version is gone 2285 Method* method = holder->method_with_orig_idnum(method_id, version); 2286 if (!version_matches(method, version)) { 2287 strcat(buf, "Redefined)"); 2288 } else { 2289 int line_number = Backtrace::get_line_number(method, bci); 2290 if (line_number == -2) { 2291 strcat(buf, "Native Method)"); 2292 } else { 2293 if (source_file_name != NULL && (line_number != -1)) { 2294 // Sourcename and linenumber 2295 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2296 } else if (source_file_name != NULL) { 2297 // Just sourcename 2298 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2299 } else { 2300 // Neither sourcename nor linenumber 2301 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2302 } 2303 CompiledMethod* nm = method->code(); 2304 if (WizardMode && nm != NULL) { 2305 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2306 } 2307 } 2308 } 2309 2310 st->print_cr("%s", buf); 2311 } 2312 2313 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2314 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2315 int method_id = method->orig_method_idnum(); 2316 int version = method->constants()->version(); 2317 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2318 } 2319 2320 /** 2321 * Print the throwable message and its stack trace plus all causes by walking the 2322 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2323 */ 2324 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2325 // First, print the message. 2326 print(throwable(), st); 2327 st->cr(); 2328 2329 // Now print the stack trace. 2330 Thread* THREAD = Thread::current(); 2331 while (throwable.not_null()) { 2332 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2333 if (result.is_null()) { 2334 st->print_raw_cr("\t<<no stack trace available>>"); 2335 return; 2336 } 2337 BacktraceIterator iter(result, THREAD); 2338 2339 while (iter.repeat()) { 2340 BacktraceElement bte = iter.next(THREAD); 2341 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2342 } 2343 { 2344 // Call getCause() which doesn't necessarily return the _cause field. 2345 EXCEPTION_MARK; 2346 JavaValue cause(T_OBJECT); 2347 JavaCalls::call_virtual(&cause, 2348 throwable, 2349 throwable->klass(), 2350 vmSymbols::getCause_name(), 2351 vmSymbols::void_throwable_signature(), 2352 THREAD); 2353 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2354 if (HAS_PENDING_EXCEPTION) { 2355 CLEAR_PENDING_EXCEPTION; 2356 throwable = Handle(); 2357 } else { 2358 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2359 if (throwable.not_null()) { 2360 st->print("Caused by: "); 2361 print(throwable(), st); 2362 st->cr(); 2363 } 2364 } 2365 } 2366 } 2367 } 2368 2369 /** 2370 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2371 */ 2372 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2373 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2374 JavaValue result(T_VOID); 2375 JavaCalls::call_virtual(&result, 2376 throwable, 2377 SystemDictionary::Throwable_klass(), 2378 vmSymbols::printStackTrace_name(), 2379 vmSymbols::void_method_signature(), 2380 THREAD); 2381 } 2382 2383 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2384 if (!StackTraceInThrowable) return; 2385 ResourceMark rm(THREAD); 2386 2387 // Start out by clearing the backtrace for this object, in case the VM 2388 // runs out of memory while allocating the stack trace 2389 set_backtrace(throwable(), NULL); 2390 // Clear lazily constructed Java level stacktrace if refilling occurs 2391 // This is unnecessary in 1.7+ but harmless 2392 clear_stacktrace(throwable()); 2393 2394 int max_depth = MaxJavaStackTraceDepth; 2395 JavaThread* thread = (JavaThread*)THREAD; 2396 2397 BacktraceBuilder bt(CHECK); 2398 2399 // If there is no Java frame just return the method that was being called 2400 // with bci 0 2401 if (!thread->has_last_Java_frame()) { 2402 if (max_depth >= 1 && method() != NULL) { 2403 bt.push(method(), 0, CHECK); 2404 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2405 set_depth(throwable(), 1); 2406 set_backtrace(throwable(), bt.backtrace()); 2407 } 2408 return; 2409 } 2410 2411 // Instead of using vframe directly, this version of fill_in_stack_trace 2412 // basically handles everything by hand. This significantly improved the 2413 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2414 // See bug 6333838 for more details. 2415 // The "ASSERT" here is to verify this method generates the exactly same stack 2416 // trace as utilizing vframe. 2417 #ifdef ASSERT 2418 vframeStream st(thread); 2419 #endif 2420 int total_count = 0; 2421 RegisterMap map(thread, false); 2422 int decode_offset = 0; 2423 CompiledMethod* nm = NULL; 2424 bool skip_fillInStackTrace_check = false; 2425 bool skip_throwableInit_check = false; 2426 bool skip_hidden = !ShowHiddenFrames; 2427 2428 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2429 Method* method = NULL; 2430 int bci = 0; 2431 2432 // Compiled java method case. 2433 if (decode_offset != 0) { 2434 DebugInfoReadStream stream(nm, decode_offset); 2435 decode_offset = stream.read_int(); 2436 method = (Method*)nm->metadata_at(stream.read_int()); 2437 bci = stream.read_bci(); 2438 } else { 2439 if (fr.is_first_frame()) break; 2440 address pc = fr.pc(); 2441 if (fr.is_interpreted_frame()) { 2442 address bcp = fr.interpreter_frame_bcp(); 2443 method = fr.interpreter_frame_method(); 2444 bci = method->bci_from(bcp); 2445 fr = fr.sender(&map); 2446 } else { 2447 CodeBlob* cb = fr.cb(); 2448 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2449 // but non nmethod 2450 fr = fr.sender(&map); 2451 if (cb == NULL || !cb->is_compiled()) { 2452 continue; 2453 } 2454 nm = cb->as_compiled_method(); 2455 if (nm->method()->is_native()) { 2456 method = nm->method(); 2457 bci = 0; 2458 } else { 2459 PcDesc* pd = nm->pc_desc_at(pc); 2460 decode_offset = pd->scope_decode_offset(); 2461 // if decode_offset is not equal to 0, it will execute the 2462 // "compiled java method case" at the beginning of the loop. 2463 continue; 2464 } 2465 } 2466 } 2467 #ifdef ASSERT 2468 assert(st.method() == method && st.bci() == bci, 2469 "Wrong stack trace"); 2470 st.next(); 2471 #endif 2472 2473 // the format of the stacktrace will be: 2474 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2475 // - 0 or more <init> methods for the exception class (skipped) 2476 // - rest of the stack 2477 2478 if (!skip_fillInStackTrace_check) { 2479 if (method->name() == vmSymbols::fillInStackTrace_name() && 2480 throwable->is_a(method->method_holder())) { 2481 continue; 2482 } 2483 else { 2484 skip_fillInStackTrace_check = true; // gone past them all 2485 } 2486 } 2487 if (!skip_throwableInit_check) { 2488 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2489 2490 // skip <init> methods of the exception class and superclasses 2491 // This is simlar to classic VM. 2492 if (method->name() == vmSymbols::object_initializer_name() && 2493 throwable->is_a(method->method_holder())) { 2494 continue; 2495 } else { 2496 // there are none or we've seen them all - either way stop checking 2497 skip_throwableInit_check = true; 2498 } 2499 } 2500 if (method->is_hidden()) { 2501 if (skip_hidden) { 2502 if (total_count == 0) { 2503 // The top frame will be hidden from the stack trace. 2504 bt.set_has_hidden_top_frame(CHECK); 2505 } 2506 continue; 2507 } 2508 } 2509 bt.push(method, bci, CHECK); 2510 total_count++; 2511 } 2512 2513 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2514 2515 // Put completed stack trace into throwable object 2516 set_backtrace(throwable(), bt.backtrace()); 2517 set_depth(throwable(), total_count); 2518 } 2519 2520 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2521 // No-op if stack trace is disabled 2522 if (!StackTraceInThrowable) { 2523 return; 2524 } 2525 2526 // Disable stack traces for some preallocated out of memory errors 2527 if (!Universe::should_fill_in_stack_trace(throwable)) { 2528 return; 2529 } 2530 2531 PRESERVE_EXCEPTION_MARK; 2532 2533 JavaThread* thread = JavaThread::active(); 2534 fill_in_stack_trace(throwable, method, thread); 2535 // ignore exceptions thrown during stack trace filling 2536 CLEAR_PENDING_EXCEPTION; 2537 } 2538 2539 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2540 // Allocate stack trace - backtrace is created but not filled in 2541 2542 // No-op if stack trace is disabled 2543 if (!StackTraceInThrowable) return; 2544 BacktraceBuilder bt(CHECK); // creates a backtrace 2545 set_backtrace(throwable(), bt.backtrace()); 2546 } 2547 2548 2549 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2550 // Fill in stack trace into preallocated backtrace (no GC) 2551 2552 // No-op if stack trace is disabled 2553 if (!StackTraceInThrowable) return; 2554 2555 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2556 2557 JavaThread* THREAD = JavaThread::current(); 2558 2559 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2560 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2561 2562 ResourceMark rm(THREAD); 2563 vframeStream st(THREAD); 2564 2565 BacktraceBuilder bt(THREAD, backtrace); 2566 2567 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2568 // methods as preallocated errors aren't created by "java" code. 2569 2570 // fill in as much stack trace as possible 2571 int chunk_count = 0; 2572 for (;!st.at_end(); st.next()) { 2573 bt.push(st.method(), st.bci(), CHECK); 2574 chunk_count++; 2575 2576 // Bail-out for deep stacks 2577 if (chunk_count >= trace_chunk_size) break; 2578 } 2579 set_depth(throwable(), chunk_count); 2580 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2581 2582 // We support the Throwable immutability protocol defined for Java 7. 2583 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2584 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2585 } 2586 2587 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2588 objArrayHandle stack_trace_array_h, TRAPS) { 2589 2590 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2591 THROW(vmSymbols::java_lang_NullPointerException()); 2592 } 2593 2594 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2595 2596 if (stack_trace_array_h->length() != depth(throwable())) { 2597 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2598 } 2599 2600 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2601 BacktraceIterator iter(result, THREAD); 2602 2603 int index = 0; 2604 while (iter.repeat()) { 2605 BacktraceElement bte = iter.next(THREAD); 2606 2607 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2608 2609 if (stack_trace_element.is_null()) { 2610 THROW(vmSymbols::java_lang_NullPointerException()); 2611 } 2612 2613 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2614 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2615 2616 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2617 method, 2618 bte._version, 2619 bte._bci, 2620 bte._name, CHECK); 2621 } 2622 } 2623 2624 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2625 Thread* THREAD = Thread::current(); 2626 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable))); 2627 BacktraceIterator iter(result, THREAD); 2628 // No backtrace available. 2629 if (!iter.repeat()) return false; 2630 2631 // If the exception happened in a frame that has been hidden, i.e., 2632 // omitted from the back trace, we can not compute the message. 2633 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2634 if (hidden != NULL) { 2635 return false; 2636 } 2637 2638 // Get first backtrace element. 2639 BacktraceElement bte = iter.next(THREAD); 2640 2641 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2642 assert(holder != NULL, "first element should be non-null"); 2643 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2644 2645 // Original version is no longer available. 2646 if (m == NULL || !version_matches(m, bte._version)) { 2647 return false; 2648 } 2649 2650 *method = m; 2651 *bci = bte._bci; 2652 return true; 2653 } 2654 2655 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2656 // Allocate java.lang.StackTraceElement instance 2657 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2658 assert(k != NULL, "must be loaded in 1.4+"); 2659 if (k->should_be_initialized()) { 2660 k->initialize(CHECK_0); 2661 } 2662 2663 Handle element = k->allocate_instance_handle(CHECK_0); 2664 2665 int version = method->constants()->version(); 2666 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2667 return element(); 2668 } 2669 2670 void java_lang_StackTraceElement::fill_in(Handle element, 2671 InstanceKlass* holder, const methodHandle& method, 2672 int version, int bci, Symbol* name, TRAPS) { 2673 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2674 2675 ResourceMark rm(THREAD); 2676 HandleMark hm(THREAD); 2677 2678 // Fill in class name 2679 Handle java_class(THREAD, holder->java_mirror()); 2680 oop classname = java_lang_Class::name(java_class, CHECK); 2681 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2682 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2683 2684 oop loader = holder->class_loader(); 2685 if (loader != NULL) { 2686 oop loader_name = java_lang_ClassLoader::name(loader); 2687 if (loader_name != NULL) 2688 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2689 } 2690 2691 // Fill in method name 2692 oop methodname = StringTable::intern(name, CHECK); 2693 java_lang_StackTraceElement::set_methodName(element(), methodname); 2694 2695 // Fill in module name and version 2696 ModuleEntry* module = holder->module(); 2697 if (module->is_named()) { 2698 oop module_name = StringTable::intern(module->name(), CHECK); 2699 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2700 oop module_version; 2701 if (module->version() != NULL) { 2702 module_version = StringTable::intern(module->version(), CHECK); 2703 } else { 2704 module_version = NULL; 2705 } 2706 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2707 } 2708 2709 if (method() == NULL || !version_matches(method(), version)) { 2710 // The method was redefined, accurate line number information isn't available 2711 java_lang_StackTraceElement::set_fileName(element(), NULL); 2712 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2713 } else { 2714 Symbol* source; 2715 oop source_file; 2716 int line_number; 2717 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2718 2719 java_lang_StackTraceElement::set_fileName(element(), source_file); 2720 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2721 } 2722 } 2723 2724 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2725 InstanceKlass* holder, 2726 int version, 2727 const methodHandle& method, 2728 int bci, 2729 Symbol*& source, 2730 oop& source_file, 2731 int& line_number, TRAPS) { 2732 // Fill in source file name and line number. 2733 source = Backtrace::get_source_file_name(holder, version); 2734 source_file = java_lang_Class::source_file(java_class()); 2735 if (source != NULL) { 2736 // Class was not redefined. We can trust its cache if set, 2737 // else we have to initialize it. 2738 if (source_file == NULL) { 2739 source_file = StringTable::intern(source, CHECK); 2740 java_lang_Class::set_source_file(java_class(), source_file); 2741 } 2742 } else { 2743 // Class was redefined. Dump the cache if it was set. 2744 if (source_file != NULL) { 2745 source_file = NULL; 2746 java_lang_Class::set_source_file(java_class(), source_file); 2747 } 2748 } 2749 line_number = Backtrace::get_line_number(method(), bci); 2750 } 2751 2752 #if INCLUDE_JVMCI 2753 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 2754 Symbol*& filename, int& line_number, TRAPS) { 2755 ResourceMark rm(THREAD); 2756 HandleMark hm(THREAD); 2757 2758 filename = NULL; 2759 line_number = -1; 2760 2761 oop source_file; 2762 int version = method->constants()->version(); 2763 InstanceKlass* holder = method->method_holder(); 2764 Handle java_class(THREAD, holder->java_mirror()); 2765 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 2766 } 2767 #endif // INCLUDE_JVMCI 2768 2769 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2770 HandleMark hm(THREAD); 2771 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2772 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2773 // we should expand MemberName::name when Throwable uses StackTrace 2774 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2775 return method; 2776 } 2777 2778 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2779 // set Method* or mid/cpref 2780 HandleMark hm(THREAD); 2781 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2782 InstanceKlass* ik = method->method_holder(); 2783 CallInfo info(method(), ik, CHECK); 2784 MethodHandles::init_method_MemberName(mname, info); 2785 // set bci 2786 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2787 // method may be redefined; store the version 2788 int version = method->constants()->version(); 2789 assert((jushort)version == version, "version should be short"); 2790 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2791 } 2792 2793 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2794 ResourceMark rm(THREAD); 2795 HandleMark hm(THREAD); 2796 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2797 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2798 InstanceKlass* holder = InstanceKlass::cast(clazz); 2799 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2800 2801 short version = stackFrame->short_field(_version_offset); 2802 int bci = stackFrame->int_field(_bci_offset); 2803 Symbol* name = method->name(); 2804 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), 2805 version, bci, name, CHECK); 2806 } 2807 2808 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2809 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2810 macro(_bci_offset, k, "bci", int_signature, false) 2811 2812 void java_lang_StackFrameInfo::compute_offsets() { 2813 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2814 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2815 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2816 } 2817 2818 #if INCLUDE_CDS 2819 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2820 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2821 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2822 } 2823 #endif 2824 2825 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2826 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2827 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2828 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2829 macro(_mode_offset, k, "mode", int_signature, false) 2830 2831 void java_lang_LiveStackFrameInfo::compute_offsets() { 2832 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2833 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2834 } 2835 2836 #if INCLUDE_CDS 2837 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2838 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2839 } 2840 #endif 2841 2842 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2843 macro(override_offset, k, "override", bool_signature, false) 2844 2845 void java_lang_reflect_AccessibleObject::compute_offsets() { 2846 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2847 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2848 } 2849 2850 #if INCLUDE_CDS 2851 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2852 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2853 } 2854 #endif 2855 2856 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 return (jboolean) reflect->bool_field(override_offset); 2859 } 2860 2861 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2863 reflect->bool_field_put(override_offset, (int) value); 2864 } 2865 2866 #define METHOD_FIELDS_DO(macro) \ 2867 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2868 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2869 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2870 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2871 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2872 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2873 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2874 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2875 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2876 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2877 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2878 2879 void java_lang_reflect_Method::compute_offsets() { 2880 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2881 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2882 } 2883 2884 #if INCLUDE_CDS 2885 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2886 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2887 } 2888 #endif 2889 2890 Handle java_lang_reflect_Method::create(TRAPS) { 2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2892 Klass* klass = SystemDictionary::reflect_Method_klass(); 2893 // This class is eagerly initialized during VM initialization, since we keep a refence 2894 // to one of the methods 2895 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2896 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2897 } 2898 2899 oop java_lang_reflect_Method::clazz(oop reflect) { 2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2901 return reflect->obj_field(clazz_offset); 2902 } 2903 2904 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2906 reflect->obj_field_put(clazz_offset, value); 2907 } 2908 2909 int java_lang_reflect_Method::slot(oop reflect) { 2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2911 return reflect->int_field(slot_offset); 2912 } 2913 2914 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2916 reflect->int_field_put(slot_offset, value); 2917 } 2918 2919 void java_lang_reflect_Method::set_name(oop method, oop value) { 2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2921 method->obj_field_put(name_offset, value); 2922 } 2923 2924 oop java_lang_reflect_Method::return_type(oop method) { 2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2926 return method->obj_field(returnType_offset); 2927 } 2928 2929 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2931 method->obj_field_put(returnType_offset, value); 2932 } 2933 2934 oop java_lang_reflect_Method::parameter_types(oop method) { 2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2936 return method->obj_field(parameterTypes_offset); 2937 } 2938 2939 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2941 method->obj_field_put(parameterTypes_offset, value); 2942 } 2943 2944 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2946 method->obj_field_put(exceptionTypes_offset, value); 2947 } 2948 2949 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2951 method->int_field_put(modifiers_offset, value); 2952 } 2953 2954 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2956 method->obj_field_put(signature_offset, value); 2957 } 2958 2959 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2961 method->obj_field_put(annotations_offset, value); 2962 } 2963 2964 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2966 method->obj_field_put(parameter_annotations_offset, value); 2967 } 2968 2969 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2971 method->obj_field_put(annotation_default_offset, value); 2972 } 2973 2974 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2975 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2976 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2977 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2978 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2979 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2980 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2981 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2982 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2983 2984 void java_lang_reflect_Constructor::compute_offsets() { 2985 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2986 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2987 } 2988 2989 #if INCLUDE_CDS 2990 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2991 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2992 } 2993 #endif 2994 2995 Handle java_lang_reflect_Constructor::create(TRAPS) { 2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2997 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2998 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2999 InstanceKlass* ik = InstanceKlass::cast(k); 3000 // Ensure it is initialized 3001 ik->initialize(CHECK_NH); 3002 return ik->allocate_instance_handle(THREAD); 3003 } 3004 3005 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3007 return reflect->obj_field(clazz_offset); 3008 } 3009 3010 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3012 reflect->obj_field_put(clazz_offset, value); 3013 } 3014 3015 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3017 return constructor->obj_field(parameterTypes_offset); 3018 } 3019 3020 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3022 constructor->obj_field_put(parameterTypes_offset, value); 3023 } 3024 3025 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3027 constructor->obj_field_put(exceptionTypes_offset, value); 3028 } 3029 3030 int java_lang_reflect_Constructor::slot(oop reflect) { 3031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3032 return reflect->int_field(slot_offset); 3033 } 3034 3035 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3037 reflect->int_field_put(slot_offset, value); 3038 } 3039 3040 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3042 constructor->int_field_put(modifiers_offset, value); 3043 } 3044 3045 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3047 constructor->obj_field_put(signature_offset, value); 3048 } 3049 3050 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3052 constructor->obj_field_put(annotations_offset, value); 3053 } 3054 3055 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3057 method->obj_field_put(parameter_annotations_offset, value); 3058 } 3059 3060 #define FIELD_FIELDS_DO(macro) \ 3061 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3062 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3063 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3064 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3065 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3066 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3067 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3068 3069 void java_lang_reflect_Field::compute_offsets() { 3070 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3071 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3072 } 3073 3074 #if INCLUDE_CDS 3075 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3076 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3077 } 3078 #endif 3079 3080 Handle java_lang_reflect_Field::create(TRAPS) { 3081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3082 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3083 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3084 InstanceKlass* ik = InstanceKlass::cast(k); 3085 // Ensure it is initialized 3086 ik->initialize(CHECK_NH); 3087 return ik->allocate_instance_handle(THREAD); 3088 } 3089 3090 oop java_lang_reflect_Field::clazz(oop reflect) { 3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3092 return reflect->obj_field(clazz_offset); 3093 } 3094 3095 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3097 reflect->obj_field_put(clazz_offset, value); 3098 } 3099 3100 oop java_lang_reflect_Field::name(oop field) { 3101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3102 return field->obj_field(name_offset); 3103 } 3104 3105 void java_lang_reflect_Field::set_name(oop field, oop value) { 3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3107 field->obj_field_put(name_offset, value); 3108 } 3109 3110 oop java_lang_reflect_Field::type(oop field) { 3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3112 return field->obj_field(type_offset); 3113 } 3114 3115 void java_lang_reflect_Field::set_type(oop field, oop value) { 3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3117 field->obj_field_put(type_offset, value); 3118 } 3119 3120 int java_lang_reflect_Field::slot(oop reflect) { 3121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3122 return reflect->int_field(slot_offset); 3123 } 3124 3125 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3127 reflect->int_field_put(slot_offset, value); 3128 } 3129 3130 int java_lang_reflect_Field::modifiers(oop field) { 3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3132 return field->int_field(modifiers_offset); 3133 } 3134 3135 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3137 field->int_field_put(modifiers_offset, value); 3138 } 3139 3140 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3142 field->obj_field_put(signature_offset, value); 3143 } 3144 3145 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3147 field->obj_field_put(annotations_offset, value); 3148 } 3149 3150 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3151 // Allocate java.lang.reflect.RecordComponent instance 3152 HandleMark hm(THREAD); 3153 InstanceKlass* ik = SystemDictionary::RecordComponent_klass(); 3154 assert(ik != NULL, "must be loaded"); 3155 ik->initialize(CHECK_NULL); 3156 3157 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3158 3159 Handle decl_class(THREAD, holder->java_mirror()); 3160 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3161 3162 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3163 oop component_name = StringTable::intern(name, CHECK_NULL); 3164 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3165 3166 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3167 Handle component_type_h = 3168 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3169 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3170 3171 Method* accessor_method = NULL; 3172 { 3173 // Prepend "()" to type to create the full method signature. 3174 ResourceMark rm(THREAD); 3175 int sig_len = type->utf8_length() + 3; // "()" and null char 3176 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3177 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3178 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3179 accessor_method = holder->find_instance_method(name, full_sig); 3180 } 3181 3182 if (accessor_method != NULL) { 3183 methodHandle method(THREAD, accessor_method); 3184 oop m = Reflection::new_method(method, false, CHECK_NULL); 3185 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3186 } else { 3187 java_lang_reflect_RecordComponent::set_accessor(element(), NULL); 3188 } 3189 3190 int sig_index = component->generic_signature_index(); 3191 if (sig_index > 0) { 3192 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3193 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3194 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3195 } else { 3196 java_lang_reflect_RecordComponent::set_signature(element(), NULL); 3197 } 3198 3199 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3200 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3201 3202 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3203 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3204 3205 return element(); 3206 } 3207 3208 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3209 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3210 3211 void reflect_ConstantPool::compute_offsets() { 3212 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3213 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3214 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3215 } 3216 3217 #if INCLUDE_CDS 3218 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3219 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3220 } 3221 #endif 3222 3223 #define PARAMETER_FIELDS_DO(macro) \ 3224 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3225 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3226 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3227 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3228 3229 void java_lang_reflect_Parameter::compute_offsets() { 3230 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3231 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3232 } 3233 3234 #if INCLUDE_CDS 3235 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3236 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3237 } 3238 #endif 3239 3240 Handle java_lang_reflect_Parameter::create(TRAPS) { 3241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3242 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3243 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3244 InstanceKlass* ik = InstanceKlass::cast(k); 3245 // Ensure it is initialized 3246 ik->initialize(CHECK_NH); 3247 return ik->allocate_instance_handle(THREAD); 3248 } 3249 3250 oop java_lang_reflect_Parameter::name(oop param) { 3251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3252 return param->obj_field(name_offset); 3253 } 3254 3255 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3257 param->obj_field_put(name_offset, value); 3258 } 3259 3260 int java_lang_reflect_Parameter::modifiers(oop param) { 3261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3262 return param->int_field(modifiers_offset); 3263 } 3264 3265 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3266 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3267 param->int_field_put(modifiers_offset, value); 3268 } 3269 3270 int java_lang_reflect_Parameter::index(oop param) { 3271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3272 return param->int_field(index_offset); 3273 } 3274 3275 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3277 param->int_field_put(index_offset, value); 3278 } 3279 3280 oop java_lang_reflect_Parameter::executable(oop param) { 3281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3282 return param->obj_field(executable_offset); 3283 } 3284 3285 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3287 param->obj_field_put(executable_offset, value); 3288 } 3289 3290 3291 int java_lang_Module::loader_offset; 3292 int java_lang_Module::name_offset; 3293 int java_lang_Module::_module_entry_offset = -1; 3294 3295 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3297 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3298 vmSymbols::java_lang_module_init_signature(), 3299 loader, module_name, CHECK_NH); 3300 } 3301 3302 #define MODULE_FIELDS_DO(macro) \ 3303 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3304 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3305 3306 void java_lang_Module::compute_offsets() { 3307 InstanceKlass* k = SystemDictionary::Module_klass(); 3308 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3309 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3310 } 3311 3312 #if INCLUDE_CDS 3313 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3314 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3315 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3316 } 3317 #endif 3318 3319 oop java_lang_Module::loader(oop module) { 3320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3321 return module->obj_field(loader_offset); 3322 } 3323 3324 void java_lang_Module::set_loader(oop module, oop value) { 3325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3326 module->obj_field_put(loader_offset, value); 3327 } 3328 3329 oop java_lang_Module::name(oop module) { 3330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3331 return module->obj_field(name_offset); 3332 } 3333 3334 void java_lang_Module::set_name(oop module, oop value) { 3335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3336 module->obj_field_put(name_offset, value); 3337 } 3338 3339 ModuleEntry* java_lang_Module::module_entry(oop module) { 3340 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3341 assert(module != NULL, "module can't be null"); 3342 assert(oopDesc::is_oop(module), "module must be oop"); 3343 3344 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3345 if (module_entry == NULL) { 3346 // If the inject field containing the ModuleEntry* is null then return the 3347 // class loader's unnamed module. 3348 oop loader = java_lang_Module::loader(module); 3349 Handle h_loader = Handle(Thread::current(), loader); 3350 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3351 return loader_cld->unnamed_module(); 3352 } 3353 return module_entry; 3354 } 3355 3356 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3357 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3358 assert(module != NULL, "module can't be null"); 3359 assert(oopDesc::is_oop(module), "module must be oop"); 3360 module->address_field_put(_module_entry_offset, (address)module_entry); 3361 } 3362 3363 Handle reflect_ConstantPool::create(TRAPS) { 3364 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3365 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3366 // Ensure it is initialized 3367 k->initialize(CHECK_NH); 3368 return k->allocate_instance_handle(THREAD); 3369 } 3370 3371 3372 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3374 oop mirror = value->pool_holder()->java_mirror(); 3375 // Save the mirror to get back the constant pool. 3376 reflect->obj_field_put(_oop_offset, mirror); 3377 } 3378 3379 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3381 3382 oop mirror = reflect->obj_field(_oop_offset); 3383 Klass* k = java_lang_Class::as_Klass(mirror); 3384 assert(k->is_instance_klass(), "Must be"); 3385 3386 // Get the constant pool back from the klass. Since class redefinition 3387 // merges the new constant pool into the old, this is essentially the 3388 // same constant pool as the original. If constant pool merging is 3389 // no longer done in the future, this will have to change to save 3390 // the original. 3391 return InstanceKlass::cast(k)->constants(); 3392 } 3393 3394 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3395 macro(_base_offset, k, "base", object_signature, false) 3396 3397 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3398 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3399 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3400 } 3401 3402 #if INCLUDE_CDS 3403 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3404 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3405 } 3406 #endif 3407 3408 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3409 Klass* k = SystemDictionary::box_klass(type); 3410 if (k == NULL) return NULL; 3411 InstanceKlass* ik = InstanceKlass::cast(k); 3412 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3413 return ik->allocate_instance(THREAD); 3414 } 3415 3416 3417 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3418 oop box = initialize_and_allocate(type, CHECK_0); 3419 if (box == NULL) return NULL; 3420 switch (type) { 3421 case T_BOOLEAN: 3422 box->bool_field_put(value_offset, value->z); 3423 break; 3424 case T_CHAR: 3425 box->char_field_put(value_offset, value->c); 3426 break; 3427 case T_FLOAT: 3428 box->float_field_put(value_offset, value->f); 3429 break; 3430 case T_DOUBLE: 3431 box->double_field_put(long_value_offset, value->d); 3432 break; 3433 case T_BYTE: 3434 box->byte_field_put(value_offset, value->b); 3435 break; 3436 case T_SHORT: 3437 box->short_field_put(value_offset, value->s); 3438 break; 3439 case T_INT: 3440 box->int_field_put(value_offset, value->i); 3441 break; 3442 case T_LONG: 3443 box->long_field_put(long_value_offset, value->j); 3444 break; 3445 default: 3446 return NULL; 3447 } 3448 return box; 3449 } 3450 3451 3452 BasicType java_lang_boxing_object::basic_type(oop box) { 3453 if (box == NULL) return T_ILLEGAL; 3454 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3455 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3456 return T_ILLEGAL; 3457 return type; 3458 } 3459 3460 3461 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3462 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3463 switch (type) { 3464 case T_BOOLEAN: 3465 value->z = box->bool_field(value_offset); 3466 break; 3467 case T_CHAR: 3468 value->c = box->char_field(value_offset); 3469 break; 3470 case T_FLOAT: 3471 value->f = box->float_field(value_offset); 3472 break; 3473 case T_DOUBLE: 3474 value->d = box->double_field(long_value_offset); 3475 break; 3476 case T_BYTE: 3477 value->b = box->byte_field(value_offset); 3478 break; 3479 case T_SHORT: 3480 value->s = box->short_field(value_offset); 3481 break; 3482 case T_INT: 3483 value->i = box->int_field(value_offset); 3484 break; 3485 case T_LONG: 3486 value->j = box->long_field(long_value_offset); 3487 break; 3488 default: 3489 return T_ILLEGAL; 3490 } // end switch 3491 return type; 3492 } 3493 3494 3495 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3496 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3497 switch (type) { 3498 case T_BOOLEAN: 3499 box->bool_field_put(value_offset, value->z); 3500 break; 3501 case T_CHAR: 3502 box->char_field_put(value_offset, value->c); 3503 break; 3504 case T_FLOAT: 3505 box->float_field_put(value_offset, value->f); 3506 break; 3507 case T_DOUBLE: 3508 box->double_field_put(long_value_offset, value->d); 3509 break; 3510 case T_BYTE: 3511 box->byte_field_put(value_offset, value->b); 3512 break; 3513 case T_SHORT: 3514 box->short_field_put(value_offset, value->s); 3515 break; 3516 case T_INT: 3517 box->int_field_put(value_offset, value->i); 3518 break; 3519 case T_LONG: 3520 box->long_field_put(long_value_offset, value->j); 3521 break; 3522 default: 3523 return T_ILLEGAL; 3524 } // end switch 3525 return type; 3526 } 3527 3528 3529 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3530 switch (type) { 3531 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3532 case T_CHAR: st->print("%d", value->c); break; 3533 case T_BYTE: st->print("%d", value->b); break; 3534 case T_SHORT: st->print("%d", value->s); break; 3535 case T_INT: st->print("%d", value->i); break; 3536 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3537 case T_FLOAT: st->print("%f", value->f); break; 3538 case T_DOUBLE: st->print("%lf", value->d); break; 3539 default: st->print("type %d?", type); break; 3540 } 3541 } 3542 3543 // Support for java_lang_ref_Reference 3544 3545 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3546 assert(obj != NULL, "sanity"); 3547 if (offset != java_lang_ref_Reference::referent_offset) { 3548 return false; 3549 } 3550 3551 Klass* k = obj->klass(); 3552 if (!k->is_instance_klass()) { 3553 return false; 3554 } 3555 3556 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3557 bool is_reference = ik->reference_type() != REF_NONE; 3558 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3559 return is_reference; 3560 } 3561 3562 // Support for java_lang_ref_SoftReference 3563 // 3564 3565 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3566 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3567 macro(static_clock_offset, k, "clock", long_signature, true) 3568 3569 void java_lang_ref_SoftReference::compute_offsets() { 3570 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3571 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3572 } 3573 3574 #if INCLUDE_CDS 3575 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3576 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3577 } 3578 #endif 3579 3580 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3581 return ref->long_field(timestamp_offset); 3582 } 3583 3584 jlong java_lang_ref_SoftReference::clock() { 3585 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3586 oop base = ik->static_field_base_raw(); 3587 return base->long_field(static_clock_offset); 3588 } 3589 3590 void java_lang_ref_SoftReference::set_clock(jlong value) { 3591 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3592 oop base = ik->static_field_base_raw(); 3593 base->long_field_put(static_clock_offset, value); 3594 } 3595 3596 // Support for java_lang_invoke_DirectMethodHandle 3597 3598 int java_lang_invoke_DirectMethodHandle::_member_offset; 3599 3600 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3601 oop member_name = NULL; 3602 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3603 "a DirectMethodHandle oop is expected"); 3604 return dmh->obj_field(member_offset_in_bytes()); 3605 } 3606 3607 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3608 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3609 3610 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3611 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3612 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3613 } 3614 3615 #if INCLUDE_CDS 3616 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3617 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3618 } 3619 #endif 3620 3621 // Support for java_lang_invoke_MethodHandle 3622 3623 int java_lang_invoke_MethodHandle::_type_offset; 3624 int java_lang_invoke_MethodHandle::_form_offset; 3625 3626 int java_lang_invoke_MemberName::_clazz_offset; 3627 int java_lang_invoke_MemberName::_name_offset; 3628 int java_lang_invoke_MemberName::_type_offset; 3629 int java_lang_invoke_MemberName::_flags_offset; 3630 int java_lang_invoke_MemberName::_method_offset; 3631 int java_lang_invoke_MemberName::_vmindex_offset; 3632 3633 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3634 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3635 3636 int java_lang_invoke_LambdaForm::_vmentry_offset; 3637 3638 #define METHODHANDLE_FIELDS_DO(macro) \ 3639 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3640 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3641 3642 void java_lang_invoke_MethodHandle::compute_offsets() { 3643 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3644 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3645 } 3646 3647 #if INCLUDE_CDS 3648 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3649 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3650 } 3651 #endif 3652 3653 #define MEMBERNAME_FIELDS_DO(macro) \ 3654 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3655 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3656 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3657 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3658 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3659 3660 void java_lang_invoke_MemberName::compute_offsets() { 3661 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3662 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3663 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3664 } 3665 3666 #if INCLUDE_CDS 3667 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3668 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3669 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3670 } 3671 #endif 3672 3673 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3674 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3675 assert(k != NULL, "jdk mismatch"); 3676 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3677 } 3678 3679 #if INCLUDE_CDS 3680 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3681 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3682 } 3683 #endif 3684 3685 #define LAMBDAFORM_FIELDS_DO(macro) \ 3686 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3687 3688 void java_lang_invoke_LambdaForm::compute_offsets() { 3689 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3690 assert (k != NULL, "jdk mismatch"); 3691 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3692 } 3693 3694 #if INCLUDE_CDS 3695 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3696 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3697 } 3698 #endif 3699 3700 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3701 return obj != NULL && is_subclass(obj->klass()); 3702 } 3703 3704 3705 oop java_lang_invoke_MethodHandle::type(oop mh) { 3706 return mh->obj_field(_type_offset); 3707 } 3708 3709 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3710 mh->obj_field_put(_type_offset, mtype); 3711 } 3712 3713 oop java_lang_invoke_MethodHandle::form(oop mh) { 3714 assert(_form_offset != 0, ""); 3715 return mh->obj_field(_form_offset); 3716 } 3717 3718 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3719 assert(_form_offset != 0, ""); 3720 mh->obj_field_put(_form_offset, lform); 3721 } 3722 3723 /// MemberName accessors 3724 3725 oop java_lang_invoke_MemberName::clazz(oop mname) { 3726 assert(is_instance(mname), "wrong type"); 3727 return mname->obj_field(_clazz_offset); 3728 } 3729 3730 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3731 assert(is_instance(mname), "wrong type"); 3732 mname->obj_field_put(_clazz_offset, clazz); 3733 } 3734 3735 oop java_lang_invoke_MemberName::name(oop mname) { 3736 assert(is_instance(mname), "wrong type"); 3737 return mname->obj_field(_name_offset); 3738 } 3739 3740 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3741 assert(is_instance(mname), "wrong type"); 3742 mname->obj_field_put(_name_offset, name); 3743 } 3744 3745 oop java_lang_invoke_MemberName::type(oop mname) { 3746 assert(is_instance(mname), "wrong type"); 3747 return mname->obj_field(_type_offset); 3748 } 3749 3750 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3751 assert(is_instance(mname), "wrong type"); 3752 mname->obj_field_put(_type_offset, type); 3753 } 3754 3755 int java_lang_invoke_MemberName::flags(oop mname) { 3756 assert(is_instance(mname), "wrong type"); 3757 return mname->int_field(_flags_offset); 3758 } 3759 3760 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3761 assert(is_instance(mname), "wrong type"); 3762 mname->int_field_put(_flags_offset, flags); 3763 } 3764 3765 3766 // Return vmtarget from ResolvedMethodName method field through indirection 3767 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3768 assert(is_instance(mname), "wrong type"); 3769 oop method = mname->obj_field(_method_offset); 3770 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3771 } 3772 3773 bool java_lang_invoke_MemberName::is_method(oop mname) { 3774 assert(is_instance(mname), "must be MemberName"); 3775 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3776 } 3777 3778 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3779 assert(is_instance(mname), "wrong type"); 3780 mname->obj_field_put(_method_offset, resolved_method); 3781 } 3782 3783 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3784 assert(is_instance(mname), "wrong type"); 3785 return (intptr_t) mname->address_field(_vmindex_offset); 3786 } 3787 3788 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3789 assert(is_instance(mname), "wrong type"); 3790 mname->address_field_put(_vmindex_offset, (address) index); 3791 } 3792 3793 3794 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3795 assert(is_instance(resolved_method), "wrong type"); 3796 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3797 assert(m->is_method(), "must be"); 3798 return m; 3799 } 3800 3801 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3802 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3803 assert(is_instance(resolved_method), "wrong type"); 3804 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3805 } 3806 3807 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3808 assert(is_instance(resolved_method), "wrong type"); 3809 resolved_method->obj_field_put(_vmholder_offset, holder); 3810 } 3811 3812 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3813 const Method* method = m(); 3814 3815 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3816 oop resolved_method = ResolvedMethodTable::find_method(method); 3817 if (resolved_method != NULL) { 3818 return resolved_method; 3819 } 3820 3821 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3822 if (!k->is_initialized()) { 3823 k->initialize(CHECK_NULL); 3824 } 3825 3826 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3827 3828 NoSafepointVerifier nsv; 3829 3830 if (method->is_old()) { 3831 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3832 method->get_new_method(); 3833 } 3834 3835 InstanceKlass* holder = method->method_holder(); 3836 3837 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3838 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3839 // distinct loaders) to ensure the metadata is kept alive. 3840 // This mirror may be different than the one in clazz field. 3841 set_vmholder(new_resolved_method, holder->java_mirror()); 3842 3843 // Set flag in class to indicate this InstanceKlass has entries in the table 3844 // to avoid walking table during redefinition if none of the redefined classes 3845 // have any membernames in the table. 3846 holder->set_has_resolved_methods(); 3847 3848 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3849 } 3850 3851 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3852 assert(is_instance(lform), "wrong type"); 3853 return lform->obj_field(_vmentry_offset); 3854 } 3855 3856 3857 // Support for java_lang_invoke_MethodType 3858 3859 int java_lang_invoke_MethodType::_rtype_offset; 3860 int java_lang_invoke_MethodType::_ptypes_offset; 3861 3862 #define METHODTYPE_FIELDS_DO(macro) \ 3863 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3864 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3865 3866 void java_lang_invoke_MethodType::compute_offsets() { 3867 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3868 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3869 } 3870 3871 #if INCLUDE_CDS 3872 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3873 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3874 } 3875 #endif 3876 3877 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3878 st->print("("); 3879 objArrayOop pts = ptypes(mt); 3880 for (int i = 0, limit = pts->length(); i < limit; i++) { 3881 java_lang_Class::print_signature(pts->obj_at(i), st); 3882 } 3883 st->print(")"); 3884 java_lang_Class::print_signature(rtype(mt), st); 3885 } 3886 3887 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 3888 ResourceMark rm; 3889 stringStream buffer(128); 3890 print_signature(mt, &buffer); 3891 const char* sigstr = buffer.base(); 3892 int siglen = (int) buffer.size(); 3893 Symbol *name; 3894 if (!intern_if_not_found) { 3895 name = SymbolTable::probe(sigstr, siglen); 3896 } else { 3897 name = SymbolTable::new_symbol(sigstr, siglen); 3898 } 3899 return name; 3900 } 3901 3902 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3903 if (mt1 == mt2) 3904 return true; 3905 if (rtype(mt1) != rtype(mt2)) 3906 return false; 3907 if (ptype_count(mt1) != ptype_count(mt2)) 3908 return false; 3909 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3910 if (ptype(mt1, i) != ptype(mt2, i)) 3911 return false; 3912 } 3913 return true; 3914 } 3915 3916 oop java_lang_invoke_MethodType::rtype(oop mt) { 3917 assert(is_instance(mt), "must be a MethodType"); 3918 return mt->obj_field(_rtype_offset); 3919 } 3920 3921 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3922 assert(is_instance(mt), "must be a MethodType"); 3923 return (objArrayOop) mt->obj_field(_ptypes_offset); 3924 } 3925 3926 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3927 return ptypes(mt)->obj_at(idx); 3928 } 3929 3930 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3931 return ptypes(mt)->length(); 3932 } 3933 3934 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3935 objArrayOop pts = ptypes(mt); 3936 int count = pts->length(); 3937 int slots = 0; 3938 for (int i = 0; i < count; i++) { 3939 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3940 slots += type2size[bt]; 3941 } 3942 return slots; 3943 } 3944 3945 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3946 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3947 return type2size[bt]; 3948 } 3949 3950 3951 // Support for java_lang_invoke_CallSite 3952 3953 int java_lang_invoke_CallSite::_target_offset; 3954 int java_lang_invoke_CallSite::_context_offset; 3955 3956 #define CALLSITE_FIELDS_DO(macro) \ 3957 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3958 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3959 3960 void java_lang_invoke_CallSite::compute_offsets() { 3961 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3962 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3963 } 3964 3965 #if INCLUDE_CDS 3966 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3967 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3968 } 3969 #endif 3970 3971 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3972 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3973 3974 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3975 return dep_oop; 3976 } 3977 3978 // Support for java_lang_invoke_ConstantCallSite 3979 3980 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 3981 3982 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 3983 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 3984 3985 void java_lang_invoke_ConstantCallSite::compute_offsets() { 3986 InstanceKlass* k = SystemDictionary::ConstantCallSite_klass(); 3987 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3988 } 3989 3990 #if INCLUDE_CDS 3991 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 3992 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3993 } 3994 #endif 3995 3996 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3997 3998 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3999 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4000 4001 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4002 InstanceKlass* k = SystemDictionary::Context_klass(); 4003 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4004 } 4005 4006 #if INCLUDE_CDS 4007 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4008 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4009 } 4010 #endif 4011 4012 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4013 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4014 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 4015 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 4016 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4017 return dep_ctx; 4018 } 4019 4020 // Support for java_security_AccessControlContext 4021 4022 int java_security_AccessControlContext::_context_offset = 0; 4023 int java_security_AccessControlContext::_privilegedContext_offset = 0; 4024 int java_security_AccessControlContext::_isPrivileged_offset = 0; 4025 int java_security_AccessControlContext::_isAuthorized_offset = -1; 4026 4027 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4028 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4029 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4030 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4031 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4032 4033 void java_security_AccessControlContext::compute_offsets() { 4034 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4035 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 4036 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4037 } 4038 4039 #if INCLUDE_CDS 4040 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4041 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4042 } 4043 #endif 4044 4045 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4046 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4047 // Ensure klass is initialized 4048 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 4049 // Allocate result 4050 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 4051 // Fill in values 4052 result->obj_field_put(_context_offset, context()); 4053 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4054 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4055 // whitelist AccessControlContexts created by the JVM if present 4056 if (_isAuthorized_offset != -1) { 4057 result->bool_field_put(_isAuthorized_offset, true); 4058 } 4059 return result; 4060 } 4061 4062 4063 // Support for java_lang_ClassLoader 4064 4065 bool java_lang_ClassLoader::offsets_computed = false; 4066 int java_lang_ClassLoader::_loader_data_offset = -1; 4067 int java_lang_ClassLoader::parallelCapable_offset = -1; 4068 int java_lang_ClassLoader::name_offset = -1; 4069 int java_lang_ClassLoader::nameAndId_offset = -1; 4070 int java_lang_ClassLoader::unnamedModule_offset = -1; 4071 4072 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4073 assert(loader != NULL, "loader must not be NULL"); 4074 assert(oopDesc::is_oop(loader), "loader must be oop"); 4075 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 4076 } 4077 4078 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 4079 assert(loader != NULL, "loader must not be NULL"); 4080 assert(oopDesc::is_oop(loader), "loader must be oop"); 4081 return RawAccess<>::load_at(loader, _loader_data_offset); 4082 } 4083 4084 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4085 assert(loader != NULL, "loader must not be NULL"); 4086 assert(oopDesc::is_oop(loader), "loader must be oop"); 4087 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 4088 } 4089 4090 #define CLASSLOADER_FIELDS_DO(macro) \ 4091 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4092 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4093 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4094 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4095 macro(parent_offset, k1, "parent", classloader_signature, false) 4096 4097 void java_lang_ClassLoader::compute_offsets() { 4098 assert(!offsets_computed, "offsets should be initialized only once"); 4099 offsets_computed = true; 4100 4101 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4102 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4103 4104 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4105 } 4106 4107 #if INCLUDE_CDS 4108 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4109 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4110 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4111 } 4112 #endif 4113 4114 oop java_lang_ClassLoader::parent(oop loader) { 4115 assert(is_instance(loader), "loader must be oop"); 4116 return loader->obj_field(parent_offset); 4117 } 4118 4119 // Returns the name field of this class loader. If the name field has not 4120 // been set, null will be returned. 4121 oop java_lang_ClassLoader::name(oop loader) { 4122 assert(is_instance(loader), "loader must be oop"); 4123 return loader->obj_field(name_offset); 4124 } 4125 4126 // Returns the nameAndId field of this class loader. The format is 4127 // as follows: 4128 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4129 // If the defining loader has no name then <qualified-class-name> @<id> 4130 // If built-in loader, then omit '@<id>' as there is only one instance. 4131 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4132 oop java_lang_ClassLoader::nameAndId(oop loader) { 4133 assert(is_instance(loader), "loader must be oop"); 4134 return loader->obj_field(nameAndId_offset); 4135 } 4136 4137 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4138 assert(is_instance(loader), "loader must be oop"); 4139 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4140 oop acl = loader; 4141 debug_only(jint loop_count = 0); 4142 // This loop taken verbatim from ClassLoader.java: 4143 do { 4144 acl = parent(acl); 4145 if (cl == acl) { 4146 return true; 4147 } 4148 assert(++loop_count > 0, "loop_count overflow"); 4149 } while (acl != NULL); 4150 return false; 4151 } 4152 4153 bool java_lang_ClassLoader::is_instance(oop obj) { 4154 return obj != NULL && is_subclass(obj->klass()); 4155 } 4156 4157 4158 // For class loader classes, parallelCapable defined 4159 // based on non-null field 4160 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4161 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4162 if (parallelCapable_offset == -1) { 4163 // Default for backward compatibility is false 4164 return false; 4165 } 4166 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4167 } 4168 4169 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4170 // Fix for 4474172; see evaluation for more details 4171 loader = non_reflection_class_loader(loader); 4172 4173 oop cl = SystemDictionary::java_system_loader(); 4174 while(cl != NULL) { 4175 if (cl == loader) return true; 4176 cl = parent(cl); 4177 } 4178 return false; 4179 } 4180 4181 // Return true if this is one of the class loaders associated with 4182 // the generated bytecodes for reflection. 4183 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4184 if (loader != NULL) { 4185 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4186 // This might be null in non-1.4 JDKs 4187 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4188 } 4189 return false; 4190 } 4191 4192 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4193 // See whether this is one of the class loaders associated with 4194 // the generated bytecodes for reflection, and if so, "magically" 4195 // delegate to its parent to prevent class loading from occurring 4196 // in places where applications using reflection didn't expect it. 4197 if (is_reflection_class_loader(loader)) { 4198 return parent(loader); 4199 } 4200 return loader; 4201 } 4202 4203 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4204 assert(is_instance(loader), "loader must be oop"); 4205 return loader->obj_field(unnamedModule_offset); 4206 } 4207 4208 // Support for java_lang_System 4209 // 4210 #define SYSTEM_FIELDS_DO(macro) \ 4211 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4212 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4213 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4214 macro(static_security_offset, k, "security", security_manager_signature, true) 4215 4216 void java_lang_System::compute_offsets() { 4217 InstanceKlass* k = SystemDictionary::System_klass(); 4218 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4219 } 4220 4221 #if INCLUDE_CDS 4222 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4223 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4224 } 4225 #endif 4226 4227 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4228 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4229 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4230 4231 // Support for jdk_internal_misc_UnsafeConstants 4232 // 4233 class UnsafeConstantsFixup : public FieldClosure { 4234 private: 4235 int _address_size; 4236 int _page_size; 4237 bool _big_endian; 4238 bool _use_unaligned_access; 4239 int _data_cache_line_flush_size; 4240 public: 4241 UnsafeConstantsFixup() { 4242 // round up values for all static final fields 4243 _address_size = sizeof(void*); 4244 _page_size = os::vm_page_size(); 4245 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4246 _use_unaligned_access = UseUnalignedAccesses; 4247 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4248 } 4249 4250 void do_field(fieldDescriptor* fd) { 4251 oop mirror = fd->field_holder()->java_mirror(); 4252 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4253 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4254 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4255 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4256 if (fd->name() == vmSymbols::address_size_name()) { 4257 mirror->int_field_put(fd->offset(), _address_size); 4258 } else if (fd->name() == vmSymbols::page_size_name()) { 4259 mirror->int_field_put(fd->offset(), _page_size); 4260 } else if (fd->name() == vmSymbols::big_endian_name()) { 4261 mirror->bool_field_put(fd->offset(), _big_endian); 4262 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4263 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4264 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4265 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4266 } else { 4267 assert(false, "unexpected UnsafeConstants field"); 4268 } 4269 } 4270 }; 4271 4272 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4273 UnsafeConstantsFixup fixup; 4274 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4275 } 4276 4277 int java_lang_Class::_klass_offset; 4278 int java_lang_Class::_array_klass_offset; 4279 int java_lang_Class::_oop_size_offset; 4280 int java_lang_Class::_static_oop_field_count_offset; 4281 int java_lang_Class::_class_loader_offset; 4282 int java_lang_Class::_module_offset; 4283 int java_lang_Class::_protection_domain_offset; 4284 int java_lang_Class::_component_mirror_offset; 4285 int java_lang_Class::_init_lock_offset; 4286 int java_lang_Class::_signers_offset; 4287 int java_lang_Class::_name_offset; 4288 int java_lang_Class::_source_file_offset; 4289 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4290 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4291 int java_lang_Throwable::backtrace_offset; 4292 int java_lang_Throwable::detailMessage_offset; 4293 int java_lang_Throwable::stackTrace_offset; 4294 int java_lang_Throwable::depth_offset; 4295 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4296 int java_lang_reflect_AccessibleObject::override_offset; 4297 int java_lang_reflect_Method::clazz_offset; 4298 int java_lang_reflect_Method::name_offset; 4299 int java_lang_reflect_Method::returnType_offset; 4300 int java_lang_reflect_Method::parameterTypes_offset; 4301 int java_lang_reflect_Method::exceptionTypes_offset; 4302 int java_lang_reflect_Method::slot_offset; 4303 int java_lang_reflect_Method::modifiers_offset; 4304 int java_lang_reflect_Method::signature_offset; 4305 int java_lang_reflect_Method::annotations_offset; 4306 int java_lang_reflect_Method::parameter_annotations_offset; 4307 int java_lang_reflect_Method::annotation_default_offset; 4308 int java_lang_reflect_Constructor::clazz_offset; 4309 int java_lang_reflect_Constructor::parameterTypes_offset; 4310 int java_lang_reflect_Constructor::exceptionTypes_offset; 4311 int java_lang_reflect_Constructor::slot_offset; 4312 int java_lang_reflect_Constructor::modifiers_offset; 4313 int java_lang_reflect_Constructor::signature_offset; 4314 int java_lang_reflect_Constructor::annotations_offset; 4315 int java_lang_reflect_Constructor::parameter_annotations_offset; 4316 int java_lang_reflect_Field::clazz_offset; 4317 int java_lang_reflect_Field::name_offset; 4318 int java_lang_reflect_Field::type_offset; 4319 int java_lang_reflect_Field::slot_offset; 4320 int java_lang_reflect_Field::modifiers_offset; 4321 int java_lang_reflect_Field::signature_offset; 4322 int java_lang_reflect_Field::annotations_offset; 4323 int java_lang_reflect_Parameter::name_offset; 4324 int java_lang_reflect_Parameter::modifiers_offset; 4325 int java_lang_reflect_Parameter::index_offset; 4326 int java_lang_reflect_Parameter::executable_offset; 4327 int java_lang_boxing_object::value_offset; 4328 int java_lang_boxing_object::long_value_offset; 4329 int java_lang_ref_Reference::referent_offset; 4330 int java_lang_ref_Reference::queue_offset; 4331 int java_lang_ref_Reference::next_offset; 4332 int java_lang_ref_Reference::discovered_offset; 4333 int java_lang_ref_SoftReference::timestamp_offset; 4334 int java_lang_ref_SoftReference::static_clock_offset; 4335 int java_lang_ClassLoader::parent_offset; 4336 int java_lang_System::static_in_offset; 4337 int java_lang_System::static_out_offset; 4338 int java_lang_System::static_err_offset; 4339 int java_lang_System::static_security_offset; 4340 int java_lang_StackTraceElement::methodName_offset; 4341 int java_lang_StackTraceElement::fileName_offset; 4342 int java_lang_StackTraceElement::lineNumber_offset; 4343 int java_lang_StackTraceElement::moduleName_offset; 4344 int java_lang_StackTraceElement::moduleVersion_offset; 4345 int java_lang_StackTraceElement::classLoaderName_offset; 4346 int java_lang_StackTraceElement::declaringClass_offset; 4347 int java_lang_StackTraceElement::declaringClassObject_offset; 4348 int java_lang_StackFrameInfo::_memberName_offset; 4349 int java_lang_StackFrameInfo::_bci_offset; 4350 int java_lang_StackFrameInfo::_version_offset; 4351 int java_lang_LiveStackFrameInfo::_monitors_offset; 4352 int java_lang_LiveStackFrameInfo::_locals_offset; 4353 int java_lang_LiveStackFrameInfo::_operands_offset; 4354 int java_lang_LiveStackFrameInfo::_mode_offset; 4355 int java_lang_AssertionStatusDirectives::classes_offset; 4356 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4357 int java_lang_AssertionStatusDirectives::packages_offset; 4358 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4359 int java_lang_AssertionStatusDirectives::deflt_offset; 4360 int java_nio_Buffer::_limit_offset; 4361 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4362 int reflect_ConstantPool::_oop_offset; 4363 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4364 int java_lang_Integer_IntegerCache::_static_cache_offset; 4365 int java_lang_Long_LongCache::_static_cache_offset; 4366 int java_lang_Character_CharacterCache::_static_cache_offset; 4367 int java_lang_Short_ShortCache::_static_cache_offset; 4368 int java_lang_Byte_ByteCache::_static_cache_offset; 4369 int java_lang_Boolean::_static_TRUE_offset; 4370 int java_lang_Boolean::_static_FALSE_offset; 4371 int java_lang_reflect_RecordComponent::clazz_offset; 4372 int java_lang_reflect_RecordComponent::name_offset; 4373 int java_lang_reflect_RecordComponent::type_offset; 4374 int java_lang_reflect_RecordComponent::accessor_offset; 4375 int java_lang_reflect_RecordComponent::signature_offset; 4376 int java_lang_reflect_RecordComponent::annotations_offset; 4377 int java_lang_reflect_RecordComponent::typeAnnotations_offset; 4378 4379 4380 4381 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4382 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4383 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4384 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4385 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4386 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4387 macro(methodName_offset, k, "methodName", string_signature, false); \ 4388 macro(fileName_offset, k, "fileName", string_signature, false); \ 4389 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4390 4391 // Support for java_lang_StackTraceElement 4392 void java_lang_StackTraceElement::compute_offsets() { 4393 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4394 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4395 } 4396 4397 #if INCLUDE_CDS 4398 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4399 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4400 } 4401 #endif 4402 4403 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4404 element->obj_field_put(fileName_offset, value); 4405 } 4406 4407 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4408 element->obj_field_put(declaringClass_offset, value); 4409 } 4410 4411 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4412 element->obj_field_put(methodName_offset, value); 4413 } 4414 4415 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4416 element->int_field_put(lineNumber_offset, value); 4417 } 4418 4419 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4420 element->obj_field_put(moduleName_offset, value); 4421 } 4422 4423 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4424 element->obj_field_put(moduleVersion_offset, value); 4425 } 4426 4427 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4428 element->obj_field_put(classLoaderName_offset, value); 4429 } 4430 4431 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4432 element->obj_field_put(declaringClassObject_offset, value); 4433 } 4434 4435 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4436 element->short_field_put(_version_offset, value); 4437 } 4438 4439 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4440 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 4441 element->int_field_put(_bci_offset, value); 4442 } 4443 4444 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4445 element->obj_field_put(_monitors_offset, value); 4446 } 4447 4448 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4449 element->obj_field_put(_locals_offset, value); 4450 } 4451 4452 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4453 element->obj_field_put(_operands_offset, value); 4454 } 4455 4456 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4457 element->int_field_put(_mode_offset, value); 4458 } 4459 4460 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4461 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4462 macro(classes_offset, k, "classes", string_array_signature, false); \ 4463 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4464 macro(packages_offset, k, "packages", string_array_signature, false); \ 4465 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4466 macro(deflt_offset, k, "deflt", bool_signature, false) 4467 4468 void java_lang_AssertionStatusDirectives::compute_offsets() { 4469 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4470 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4471 } 4472 4473 #if INCLUDE_CDS 4474 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4475 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4476 } 4477 #endif 4478 4479 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4480 o->obj_field_put(classes_offset, val); 4481 } 4482 4483 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4484 o->obj_field_put(classEnabled_offset, val); 4485 } 4486 4487 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4488 o->obj_field_put(packages_offset, val); 4489 } 4490 4491 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4492 o->obj_field_put(packageEnabled_offset, val); 4493 } 4494 4495 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4496 o->bool_field_put(deflt_offset, val); 4497 } 4498 4499 4500 // Support for intrinsification of java.nio.Buffer.checkIndex 4501 int java_nio_Buffer::limit_offset() { 4502 return _limit_offset; 4503 } 4504 4505 #define BUFFER_FIELDS_DO(macro) \ 4506 macro(_limit_offset, k, "limit", int_signature, false) 4507 4508 void java_nio_Buffer::compute_offsets() { 4509 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4510 assert(k != NULL, "must be loaded in 1.4+"); 4511 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4512 } 4513 4514 #if INCLUDE_CDS 4515 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4516 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4517 } 4518 #endif 4519 4520 #define AOS_FIELDS_DO(macro) \ 4521 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4522 4523 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4524 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4525 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4526 } 4527 4528 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4529 assert(_owner_offset != 0, "Must be initialized"); 4530 return obj->obj_field(_owner_offset); 4531 } 4532 4533 #if INCLUDE_CDS 4534 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4535 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4536 } 4537 #endif 4538 4539 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4540 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4541 4542 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4543 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4544 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4545 } 4546 4547 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4548 oop base = ik->static_field_base_raw(); 4549 return objArrayOop(base->obj_field(_static_cache_offset)); 4550 } 4551 4552 Symbol* java_lang_Integer_IntegerCache::symbol() { 4553 return vmSymbols::java_lang_Integer_IntegerCache(); 4554 } 4555 4556 #if INCLUDE_CDS 4557 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4558 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4559 } 4560 #endif 4561 #undef INTEGER_CACHE_FIELDS_DO 4562 4563 jint java_lang_Integer::value(oop obj) { 4564 jvalue v; 4565 java_lang_boxing_object::get_value(obj, &v); 4566 return v.i; 4567 } 4568 4569 #define LONG_CACHE_FIELDS_DO(macro) \ 4570 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4571 4572 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4573 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4574 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4575 } 4576 4577 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4578 oop base = ik->static_field_base_raw(); 4579 return objArrayOop(base->obj_field(_static_cache_offset)); 4580 } 4581 4582 Symbol* java_lang_Long_LongCache::symbol() { 4583 return vmSymbols::java_lang_Long_LongCache(); 4584 } 4585 4586 #if INCLUDE_CDS 4587 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4588 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4589 } 4590 #endif 4591 #undef LONG_CACHE_FIELDS_DO 4592 4593 jlong java_lang_Long::value(oop obj) { 4594 jvalue v; 4595 java_lang_boxing_object::get_value(obj, &v); 4596 return v.j; 4597 } 4598 4599 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4600 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4601 4602 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4603 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4604 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4605 } 4606 4607 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4608 oop base = ik->static_field_base_raw(); 4609 return objArrayOop(base->obj_field(_static_cache_offset)); 4610 } 4611 4612 Symbol* java_lang_Character_CharacterCache::symbol() { 4613 return vmSymbols::java_lang_Character_CharacterCache(); 4614 } 4615 4616 #if INCLUDE_CDS 4617 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4618 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4619 } 4620 #endif 4621 #undef CHARACTER_CACHE_FIELDS_DO 4622 4623 jchar java_lang_Character::value(oop obj) { 4624 jvalue v; 4625 java_lang_boxing_object::get_value(obj, &v); 4626 return v.c; 4627 } 4628 4629 #define SHORT_CACHE_FIELDS_DO(macro) \ 4630 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4631 4632 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4633 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4634 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4635 } 4636 4637 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4638 oop base = ik->static_field_base_raw(); 4639 return objArrayOop(base->obj_field(_static_cache_offset)); 4640 } 4641 4642 Symbol* java_lang_Short_ShortCache::symbol() { 4643 return vmSymbols::java_lang_Short_ShortCache(); 4644 } 4645 4646 #if INCLUDE_CDS 4647 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4648 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4649 } 4650 #endif 4651 #undef SHORT_CACHE_FIELDS_DO 4652 4653 jshort java_lang_Short::value(oop obj) { 4654 jvalue v; 4655 java_lang_boxing_object::get_value(obj, &v); 4656 return v.s; 4657 } 4658 4659 #define BYTE_CACHE_FIELDS_DO(macro) \ 4660 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4661 4662 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4663 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4664 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4665 } 4666 4667 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4668 oop base = ik->static_field_base_raw(); 4669 return objArrayOop(base->obj_field(_static_cache_offset)); 4670 } 4671 4672 Symbol* java_lang_Byte_ByteCache::symbol() { 4673 return vmSymbols::java_lang_Byte_ByteCache(); 4674 } 4675 4676 #if INCLUDE_CDS 4677 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4678 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4679 } 4680 #endif 4681 #undef BYTE_CACHE_FIELDS_DO 4682 4683 jbyte java_lang_Byte::value(oop obj) { 4684 jvalue v; 4685 java_lang_boxing_object::get_value(obj, &v); 4686 return v.b; 4687 } 4688 #define BOOLEAN_FIELDS_DO(macro) \ 4689 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4690 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4691 4692 4693 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4694 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4695 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4696 } 4697 4698 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4699 oop base = ik->static_field_base_raw(); 4700 return base->obj_field(_static_TRUE_offset); 4701 } 4702 4703 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4704 oop base = ik->static_field_base_raw(); 4705 return base->obj_field(_static_FALSE_offset); 4706 } 4707 4708 Symbol* java_lang_Boolean::symbol() { 4709 return vmSymbols::java_lang_Boolean(); 4710 } 4711 4712 #if INCLUDE_CDS 4713 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4714 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4715 } 4716 #endif 4717 #undef BOOLEAN_CACHE_FIELDS_DO 4718 4719 jboolean java_lang_Boolean::value(oop obj) { 4720 jvalue v; 4721 java_lang_boxing_object::get_value(obj, &v); 4722 return v.z; 4723 } 4724 4725 static int member_offset(int hardcoded_offset) { 4726 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4727 } 4728 4729 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 4730 macro(clazz_offset, k, "clazz", class_signature, false); \ 4731 macro(name_offset, k, "name", string_signature, false); \ 4732 macro(type_offset, k, "type", class_signature, false); \ 4733 macro(accessor_offset, k, "accessor", reflect_method_signature, false); \ 4734 macro(signature_offset, k, "signature", string_signature, false); \ 4735 macro(annotations_offset, k, "annotations", byte_array_signature, false); \ 4736 macro(typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 4737 4738 // Support for java_lang_reflect_RecordComponent 4739 void java_lang_reflect_RecordComponent::compute_offsets() { 4740 InstanceKlass* k = SystemDictionary::RecordComponent_klass(); 4741 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4742 } 4743 4744 #if INCLUDE_CDS 4745 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 4746 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4747 } 4748 #endif 4749 4750 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 4751 element->obj_field_put(clazz_offset, value); 4752 } 4753 4754 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 4755 element->obj_field_put(name_offset, value); 4756 } 4757 4758 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 4759 element->obj_field_put(type_offset, value); 4760 } 4761 4762 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 4763 element->obj_field_put(accessor_offset, value); 4764 } 4765 4766 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 4767 element->obj_field_put(signature_offset, value); 4768 } 4769 4770 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 4771 element->obj_field_put(annotations_offset, value); 4772 } 4773 4774 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 4775 element->obj_field_put(typeAnnotations_offset, value); 4776 } 4777 4778 // Compute hard-coded offsets 4779 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4780 // are not available to determine the offset_of_static_fields. 4781 void JavaClasses::compute_hard_coded_offsets() { 4782 4783 // java_lang_boxing_object 4784 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4785 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4786 4787 // java_lang_ref_Reference 4788 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4789 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4790 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4791 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4792 } 4793 4794 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4795 4796 // Compute non-hard-coded field offsets of all the classes in this file 4797 void JavaClasses::compute_offsets() { 4798 if (UseSharedSpaces) { 4799 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4800 JvmtiExport::has_early_class_hook_env()), 4801 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4802 // None of the classes used by the rest of this function can be replaced by 4803 // JMVTI ClassFileLoadHook. 4804 // We are safe to use the archived offsets, which have already been restored 4805 // by JavaClasses::serialize_offsets, without computing the offsets again. 4806 return; 4807 } 4808 4809 // We have already called the compute_offsets() of the 4810 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4811 // earlier inside SystemDictionary::resolve_well_known_classes() 4812 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4813 } 4814 4815 #if INCLUDE_CDS 4816 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4817 4818 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4819 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4820 } 4821 #endif 4822 4823 #if INCLUDE_CDS_JAVA_HEAP 4824 bool JavaClasses::is_supported_for_archiving(oop obj) { 4825 Klass* klass = obj->klass(); 4826 4827 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 4828 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed 4829 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 4830 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes 4831 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 4832 // So for now we cannot not support these classes for archiving. 4833 // 4834 // These objects typically are not referenced by static fields, but rather by resolved 4835 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 4836 klass == SystemDictionary::ResolvedMethodName_klass() || 4837 klass == SystemDictionary::MemberName_klass() || 4838 klass == SystemDictionary::Context_klass()) { 4839 return false; 4840 } 4841 4842 return true; 4843 } 4844 #endif 4845 4846 #ifndef PRODUCT 4847 4848 // These functions exist to assert the validity of hard-coded field offsets to guard 4849 // against changes in the class files 4850 4851 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4852 EXCEPTION_MARK; 4853 fieldDescriptor fd; 4854 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4855 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4856 InstanceKlass* ik = InstanceKlass::cast(k); 4857 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4858 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4859 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4860 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4861 return false; 4862 } 4863 if (fd.is_static()) { 4864 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4865 return false; 4866 } 4867 if (fd.offset() == hardcoded_offset ) { 4868 return true; 4869 } else { 4870 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4871 klass_name, field_name, hardcoded_offset, fd.offset()); 4872 return false; 4873 } 4874 } 4875 4876 // Check the hard-coded field offsets of all the classes in this file 4877 4878 void JavaClasses::check_offsets() { 4879 bool valid = true; 4880 4881 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4882 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4883 4884 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4885 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4886 4887 // Boxed primitive objects (java_lang_boxing_object) 4888 4889 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4890 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4891 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4892 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4893 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4894 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4895 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4896 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4897 4898 // java.lang.ref.Reference 4899 4900 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4901 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4902 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4903 // Fake field 4904 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4905 4906 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4907 } 4908 4909 #endif // PRODUCT 4910 4911 int InjectedField::compute_offset() { 4912 InstanceKlass* ik = InstanceKlass::cast(klass()); 4913 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4914 if (!may_be_java && !fs.access_flags().is_internal()) { 4915 // Only look at injected fields 4916 continue; 4917 } 4918 if (fs.name() == name() && fs.signature() == signature()) { 4919 return fs.offset(); 4920 } 4921 } 4922 ResourceMark rm; 4923 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)" : ""); 4924 #ifndef PRODUCT 4925 ik->print(); 4926 tty->print_cr("all fields:"); 4927 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4928 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4929 } 4930 #endif //PRODUCT 4931 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4932 return -1; 4933 } 4934 4935 void javaClasses_init() { 4936 JavaClasses::compute_offsets(); 4937 JavaClasses::check_offsets(); 4938 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4939 }