1 /* 2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/symbolTable.hpp" 32 #include "classfile/vmSymbols.hpp" 33 #include "code/debugInfo.hpp" 34 #include "code/dependencyContext.hpp" 35 #include "code/pcDesc.hpp" 36 #include "interpreter/interpreter.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "logging/log.hpp" 39 #include "logging/logStream.hpp" 40 #include "memory/heapShared.inline.hpp" 41 #include "memory/metaspaceShared.hpp" 42 #include "memory/oopFactory.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "memory/universe.hpp" 45 #include "oops/fieldStreams.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/instanceMirrorKlass.hpp" 48 #include "oops/klass.hpp" 49 #include "oops/method.inline.hpp" 50 #include "oops/objArrayOop.inline.hpp" 51 #include "oops/oop.inline.hpp" 52 #include "oops/symbol.hpp" 53 #include "oops/typeArrayOop.inline.hpp" 54 #include "prims/jvmtiExport.hpp" 55 #include "prims/resolvedMethodTable.hpp" 56 #include "runtime/fieldDescriptor.inline.hpp" 57 #include "runtime/frame.inline.hpp" 58 #include "runtime/handles.inline.hpp" 59 #include "runtime/interfaceSupport.inline.hpp" 60 #include "runtime/java.hpp" 61 #include "runtime/javaCalls.hpp" 62 #include "runtime/jniHandles.inline.hpp" 63 #include "runtime/safepoint.hpp" 64 #include "runtime/safepointVerifiers.hpp" 65 #include "runtime/thread.inline.hpp" 66 #include "runtime/vframe.inline.hpp" 67 #include "runtime/vm_version.hpp" 68 #include "utilities/align.hpp" 69 #include "utilities/preserveException.hpp" 70 #include "utilities/utf8.hpp" 71 #if INCLUDE_JVMCI 72 #include "jvmci/jvmciJavaClasses.hpp" 73 #endif 74 75 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 76 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 77 78 #if INCLUDE_CDS 79 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 80 f->do_u4((u4*)&_##name##_offset); 81 #endif 82 83 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 84 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 85 86 InjectedField JavaClasses::_injected_fields[] = { 87 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 88 }; 89 90 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 91 return _injected_fields[id].compute_offset(); 92 } 93 94 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 95 *field_count = 0; 96 97 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 98 if (sid == vmSymbols::NO_SID) { 99 // Only well known classes can inject fields 100 return NULL; 101 } 102 103 int count = 0; 104 int start = -1; 105 106 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 107 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 108 count++; \ 109 if (start == -1) start = klass##_##name##_enum; \ 110 } 111 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 112 #undef LOOKUP_INJECTED_FIELD 113 114 if (start != -1) { 115 *field_count = count; 116 return _injected_fields + start; 117 } 118 return NULL; 119 } 120 121 122 // Helpful routine for computing field offsets at run time rather than hardcoding them 123 // Finds local fields only, including static fields. Static field offsets are from the 124 // beginning of the mirror. 125 static void compute_offset(int &dest_offset, 126 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 127 bool is_static = false) { 128 fieldDescriptor fd; 129 if (ik == NULL) { 130 ResourceMark rm; 131 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 132 vm_exit_during_initialization("Invalid layout of well-known class"); 133 } 134 135 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 136 ResourceMark rm; 137 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 138 name_symbol->as_C_string(), signature_symbol->as_C_string()); 139 #ifndef PRODUCT 140 // Prints all fields and offsets 141 Log(class) lt; 142 LogStream ls(lt.error()); 143 ik->print_on(&ls); 144 #endif //PRODUCT 145 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 146 } 147 dest_offset = fd.offset(); 148 } 149 150 // Overloading to pass name as a string. 151 static void compute_offset(int& dest_offset, InstanceKlass* ik, 152 const char* name_string, Symbol* signature_symbol, 153 bool is_static = false) { 154 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 155 if (name == NULL) { 156 ResourceMark rm; 157 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 158 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 159 } 160 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 161 } 162 163 int java_lang_String::value_offset = 0; 164 int java_lang_String::hash_offset = 0; 165 int java_lang_String::hashIsZero_offset = 0; 166 int java_lang_String::coder_offset = 0; 167 168 bool java_lang_String::initialized = false; 169 170 bool java_lang_String::is_instance(oop obj) { 171 return is_instance_inlined(obj); 172 } 173 174 #if INCLUDE_CDS 175 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 176 f->do_u4((u4*)&offset) 177 #endif 178 179 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 180 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 181 182 #define STRING_FIELDS_DO(macro) \ 183 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 184 macro(hash_offset, k, "hash", int_signature, false); \ 185 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 186 macro(coder_offset, k, "coder", byte_signature, false); 187 188 void java_lang_String::compute_offsets() { 189 if (initialized) { 190 return; 191 } 192 193 InstanceKlass* k = SystemDictionary::String_klass(); 194 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 195 196 initialized = true; 197 } 198 199 #if INCLUDE_CDS 200 void java_lang_String::serialize_offsets(SerializeClosure* f) { 201 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 202 f->do_bool(&initialized); 203 } 204 #endif 205 206 class CompactStringsFixup : public FieldClosure { 207 private: 208 bool _value; 209 210 public: 211 CompactStringsFixup(bool value) : _value(value) {} 212 213 void do_field(fieldDescriptor* fd) { 214 if (fd->name() == vmSymbols::compact_strings_name()) { 215 oop mirror = fd->field_holder()->java_mirror(); 216 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 217 assert(mirror != NULL, "String must have mirror already"); 218 mirror->bool_field_put(fd->offset(), _value); 219 } 220 } 221 }; 222 223 void java_lang_String::set_compact_strings(bool value) { 224 CompactStringsFixup fix(value); 225 SystemDictionary::String_klass()->do_local_static_fields(&fix); 226 } 227 228 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 229 assert(initialized, "Must be initialized"); 230 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 231 232 // Create the String object first, so there's a chance that the String 233 // and the char array it points to end up in the same cache line. 234 oop obj; 235 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 236 237 // Create the char array. The String object must be handlized here 238 // because GC can happen as a result of the allocation attempt. 239 Handle h_obj(THREAD, obj); 240 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 241 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 242 243 // Point the String at the char array 244 obj = h_obj(); 245 set_value(obj, buffer); 246 // No need to zero the offset, allocation zero'ed the entire String object 247 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 248 return h_obj; 249 } 250 251 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 252 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 253 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 254 typeArrayOop buffer = value(h_obj()); 255 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 256 if (is_latin1) { 257 for (int index = 0; index < length; index++) { 258 buffer->byte_at_put(index, (jbyte)unicode[index]); 259 } 260 } else { 261 for (int index = 0; index < length; index++) { 262 buffer->char_at_put(index, unicode[index]); 263 } 264 } 265 266 #ifdef ASSERT 267 { 268 ResourceMark rm; 269 char* expected = UNICODE::as_utf8(unicode, length); 270 char* actual = as_utf8_string(h_obj()); 271 if (strcmp(expected, actual) != 0) { 272 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 273 ShouldNotReachHere(); 274 } 275 } 276 #endif 277 278 return h_obj; 279 } 280 281 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 282 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 283 return h_obj(); 284 } 285 286 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 287 if (utf8_str == NULL) { 288 return Handle(); 289 } 290 bool has_multibyte, is_latin1; 291 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 292 if (!CompactStrings) { 293 has_multibyte = true; 294 is_latin1 = false; 295 } 296 297 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 298 if (length > 0) { 299 if (!has_multibyte) { 300 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 301 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 302 } else if (is_latin1) { 303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 304 } else { 305 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 306 } 307 } 308 309 #ifdef ASSERT 310 // This check is too strict because the input string is not necessarily valid UTF8. 311 // For example, it may be created with arbitrary content via jni_NewStringUTF. 312 /* 313 { 314 ResourceMark rm; 315 const char* expected = utf8_str; 316 char* actual = as_utf8_string(h_obj()); 317 if (strcmp(expected, actual) != 0) { 318 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 319 ShouldNotReachHere(); 320 } 321 } 322 */ 323 #endif 324 325 return h_obj; 326 } 327 328 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 329 Handle h_obj = create_from_str(utf8_str, CHECK_0); 330 return h_obj(); 331 } 332 333 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 334 const char* utf8_str = (char*)symbol->bytes(); 335 int utf8_len = symbol->utf8_length(); 336 337 bool has_multibyte, is_latin1; 338 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 339 if (!CompactStrings) { 340 has_multibyte = true; 341 is_latin1 = false; 342 } 343 344 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 345 if (length > 0) { 346 if (!has_multibyte) { 347 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 348 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 349 } else if (is_latin1) { 350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 351 } else { 352 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 353 } 354 } 355 356 #ifdef ASSERT 357 { 358 ResourceMark rm; 359 const char* expected = symbol->as_utf8(); 360 char* actual = as_utf8_string(h_obj()); 361 if (strncmp(expected, actual, utf8_len) != 0) { 362 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 363 ShouldNotReachHere(); 364 } 365 } 366 #endif 367 368 return h_obj; 369 } 370 371 // Converts a C string to a Java String based on current encoding 372 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 373 assert(str != NULL, "bad arguments"); 374 375 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 376 static to_java_string_fn_t _to_java_string_fn = NULL; 377 378 if (_to_java_string_fn == NULL) { 379 void *lib_handle = os::native_java_library(); 380 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 381 if (_to_java_string_fn == NULL) { 382 fatal("NewStringPlatform missing"); 383 } 384 } 385 386 jstring js = NULL; 387 { 388 assert(THREAD->is_Java_thread(), "must be java thread"); 389 JavaThread* thread = (JavaThread*)THREAD; 390 HandleMark hm(thread); 391 ThreadToNativeFromVM ttn(thread); 392 js = (_to_java_string_fn)(thread->jni_environment(), str); 393 } 394 395 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 396 JNIHandles::destroy_local(js); // destroy local JNIHandle. 397 return native_platform_string; 398 } 399 400 // Converts a Java String to a native C string that can be used for 401 // native OS calls. 402 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 403 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 404 static to_platform_string_fn_t _to_platform_string_fn = NULL; 405 406 if (_to_platform_string_fn == NULL) { 407 void *lib_handle = os::native_java_library(); 408 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 409 if (_to_platform_string_fn == NULL) { 410 fatal("GetStringPlatformChars missing"); 411 } 412 } 413 414 char *native_platform_string; 415 { JavaThread* thread = (JavaThread*)THREAD; 416 assert(thread->is_Java_thread(), "must be java thread"); 417 JNIEnv *env = thread->jni_environment(); 418 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 419 bool is_copy; 420 HandleMark hm(thread); 421 ThreadToNativeFromVM ttn(thread); 422 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 423 assert(is_copy == JNI_TRUE, "is_copy value changed"); 424 JNIHandles::destroy_local(js); 425 } 426 return native_platform_string; 427 } 428 429 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 430 oop obj = java_string(); 431 // Typical usage is to convert all '/' to '.' in string. 432 typeArrayOop value = java_lang_String::value(obj); 433 int length = java_lang_String::length(obj, value); 434 bool is_latin1 = java_lang_String::is_latin1(obj); 435 436 // First check if any from_char exist 437 int index; // Declared outside, used later 438 for (index = 0; index < length; index++) { 439 jchar c = !is_latin1 ? value->char_at(index) : 440 ((jchar) value->byte_at(index)) & 0xff; 441 if (c == from_char) { 442 break; 443 } 444 } 445 if (index == length) { 446 // No from_char, so do not copy. 447 return java_string; 448 } 449 450 // Check if result string will be latin1 451 bool to_is_latin1 = false; 452 453 // Replacement char must be latin1 454 if (CompactStrings && UNICODE::is_latin1(to_char)) { 455 if (is_latin1) { 456 // Source string is latin1 as well 457 to_is_latin1 = true; 458 } else if (!UNICODE::is_latin1(from_char)) { 459 // We are replacing an UTF16 char. Scan string to 460 // check if result can be latin1 encoded. 461 to_is_latin1 = true; 462 for (index = 0; index < length; index++) { 463 jchar c = value->char_at(index); 464 if (c != from_char && !UNICODE::is_latin1(c)) { 465 to_is_latin1 = false; 466 break; 467 } 468 } 469 } 470 } 471 472 // Create new UNICODE (or byte) buffer. Must handlize value because GC 473 // may happen during String and char array creation. 474 typeArrayHandle h_value(THREAD, value); 475 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 476 typeArrayOop from_buffer = h_value(); 477 typeArrayOop to_buffer = java_lang_String::value(string()); 478 479 // Copy contents 480 for (index = 0; index < length; index++) { 481 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 482 ((jchar) from_buffer->byte_at(index)) & 0xff; 483 if (c == from_char) { 484 c = to_char; 485 } 486 if (!to_is_latin1) { 487 to_buffer->char_at_put(index, c); 488 } else { 489 to_buffer->byte_at_put(index, (jbyte) c); 490 } 491 } 492 return string; 493 } 494 495 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 496 typeArrayOop value = java_lang_String::value(java_string); 497 length = java_lang_String::length(java_string, value); 498 bool is_latin1 = java_lang_String::is_latin1(java_string); 499 500 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 501 if (result != NULL) { 502 if (!is_latin1) { 503 for (int index = 0; index < length; index++) { 504 result[index] = value->char_at(index); 505 } 506 } else { 507 for (int index = 0; index < length; index++) { 508 result[index] = ((jchar) value->byte_at(index)) & 0xff; 509 } 510 } 511 } else { 512 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 513 } 514 return result; 515 } 516 517 unsigned int java_lang_String::hash_code(oop java_string) { 518 // The hash and hashIsZero fields are subject to a benign data race, 519 // making it crucial to ensure that any observable result of the 520 // calculation in this method stays correct under any possible read of 521 // these fields. Necessary restrictions to allow this to be correct 522 // without explicit memory fences or similar concurrency primitives is 523 // that we can ever only write to one of these two fields for a given 524 // String instance, and that the computation is idempotent and derived 525 // from immutable state 526 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized"); 527 if (java_lang_String::hash_is_set(java_string)) { 528 return java_string->int_field(hash_offset); 529 } 530 531 typeArrayOop value = java_lang_String::value(java_string); 532 int length = java_lang_String::length(java_string, value); 533 bool is_latin1 = java_lang_String::is_latin1(java_string); 534 535 unsigned int hash = 0; 536 if (length > 0) { 537 if (is_latin1) { 538 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 539 } else { 540 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 541 } 542 } 543 544 if (hash != 0) { 545 java_string->int_field_put(hash_offset, hash); 546 } else { 547 java_string->bool_field_put(hashIsZero_offset, true); 548 } 549 return hash; 550 } 551 552 char* java_lang_String::as_quoted_ascii(oop java_string) { 553 typeArrayOop value = java_lang_String::value(java_string); 554 int length = java_lang_String::length(java_string, value); 555 bool is_latin1 = java_lang_String::is_latin1(java_string); 556 557 if (length == 0) return NULL; 558 559 char* result; 560 int result_length; 561 if (!is_latin1) { 562 jchar* base = value->char_at_addr(0); 563 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 564 result = NEW_RESOURCE_ARRAY(char, result_length); 565 UNICODE::as_quoted_ascii(base, length, result, result_length); 566 } else { 567 jbyte* base = value->byte_at_addr(0); 568 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 569 result = NEW_RESOURCE_ARRAY(char, result_length); 570 UNICODE::as_quoted_ascii(base, length, result, result_length); 571 } 572 assert(result_length >= length + 1, "must not be shorter"); 573 assert(result_length == (int)strlen(result) + 1, "must match"); 574 return result; 575 } 576 577 Symbol* java_lang_String::as_symbol(oop java_string) { 578 typeArrayOop value = java_lang_String::value(java_string); 579 int length = java_lang_String::length(java_string, value); 580 bool is_latin1 = java_lang_String::is_latin1(java_string); 581 if (!is_latin1) { 582 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 583 Symbol* sym = SymbolTable::new_symbol(base, length); 584 return sym; 585 } else { 586 ResourceMark rm; 587 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 588 const char* base = UNICODE::as_utf8(position, length); 589 Symbol* sym = SymbolTable::new_symbol(base, length); 590 return sym; 591 } 592 } 593 594 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 595 typeArrayOop value = java_lang_String::value(java_string); 596 int length = java_lang_String::length(java_string, value); 597 bool is_latin1 = java_lang_String::is_latin1(java_string); 598 if (!is_latin1) { 599 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 600 return SymbolTable::probe_unicode(base, length); 601 } else { 602 ResourceMark rm; 603 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 604 const char* base = UNICODE::as_utf8(position, length); 605 return SymbolTable::probe(base, length); 606 } 607 } 608 609 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 610 assert(value_equals(value, java_lang_String::value(java_string)), 611 "value must be same as java_lang_String::value(java_string)"); 612 int length = java_lang_String::length(java_string, value); 613 if (length == 0) { 614 return 0; 615 } 616 if (!java_lang_String::is_latin1(java_string)) { 617 return UNICODE::utf8_length(value->char_at_addr(0), length); 618 } else { 619 return UNICODE::utf8_length(value->byte_at_addr(0), length); 620 } 621 } 622 623 int java_lang_String::utf8_length(oop java_string) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 return utf8_length(java_string, value); 626 } 627 628 char* java_lang_String::as_utf8_string(oop java_string) { 629 typeArrayOop value = java_lang_String::value(java_string); 630 int length = java_lang_String::length(java_string, value); 631 bool is_latin1 = java_lang_String::is_latin1(java_string); 632 if (!is_latin1) { 633 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 634 return UNICODE::as_utf8(position, length); 635 } else { 636 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 637 return UNICODE::as_utf8(position, length); 638 } 639 } 640 641 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 642 assert(value_equals(value, java_lang_String::value(java_string)), 643 "value must be same as java_lang_String::value(java_string)"); 644 int length = java_lang_String::length(java_string, value); 645 bool is_latin1 = java_lang_String::is_latin1(java_string); 646 if (!is_latin1) { 647 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 648 return UNICODE::as_utf8(position, length, buf, buflen); 649 } else { 650 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 651 return UNICODE::as_utf8(position, length, buf, buflen); 652 } 653 } 654 655 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 656 typeArrayOop value = java_lang_String::value(java_string); 657 return as_utf8_string(java_string, value, buf, buflen); 658 } 659 660 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 661 typeArrayOop value = java_lang_String::value(java_string); 662 bool is_latin1 = java_lang_String::is_latin1(java_string); 663 assert(start + len <= java_lang_String::length(java_string), "just checking"); 664 if (!is_latin1) { 665 jchar* position = value->char_at_addr(start); 666 return UNICODE::as_utf8(position, len); 667 } else { 668 jbyte* position = value->byte_at_addr(start); 669 return UNICODE::as_utf8(position, len); 670 } 671 } 672 673 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 674 assert(value_equals(value, java_lang_String::value(java_string)), 675 "value must be same as java_lang_String::value(java_string)"); 676 assert(start + len <= java_lang_String::length(java_string), "just checking"); 677 bool is_latin1 = java_lang_String::is_latin1(java_string); 678 if (!is_latin1) { 679 jchar* position = value->char_at_addr(start); 680 return UNICODE::as_utf8(position, len, buf, buflen); 681 } else { 682 jbyte* position = value->byte_at_addr(start); 683 return UNICODE::as_utf8(position, len, buf, buflen); 684 } 685 } 686 687 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 688 assert(java_string->klass() == SystemDictionary::String_klass(), 689 "must be java_string"); 690 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 691 int length = java_lang_String::length(java_string, value); 692 if (length != len) { 693 return false; 694 } 695 bool is_latin1 = java_lang_String::is_latin1(java_string); 696 if (!is_latin1) { 697 for (int i = 0; i < len; i++) { 698 if (value->char_at(i) != chars[i]) { 699 return false; 700 } 701 } 702 } else { 703 for (int i = 0; i < len; i++) { 704 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 705 return false; 706 } 707 } 708 } 709 return true; 710 } 711 712 bool java_lang_String::equals(oop str1, oop str2) { 713 assert(str1->klass() == SystemDictionary::String_klass(), 714 "must be java String"); 715 assert(str2->klass() == SystemDictionary::String_klass(), 716 "must be java String"); 717 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 718 bool is_latin1 = java_lang_String::is_latin1(str1); 719 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 720 bool is_latin2 = java_lang_String::is_latin1(str2); 721 722 if (is_latin1 != is_latin2) { 723 // Strings with different coders are never equal. 724 return false; 725 } 726 return value_equals(value1, value2); 727 } 728 729 void java_lang_String::print(oop java_string, outputStream* st) { 730 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 731 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 732 733 if (value == NULL) { 734 // This can happen if, e.g., printing a String 735 // object before its initializer has been called 736 st->print("NULL"); 737 return; 738 } 739 740 int length = java_lang_String::length(java_string, value); 741 bool is_latin1 = java_lang_String::is_latin1(java_string); 742 743 st->print("\""); 744 for (int index = 0; index < length; index++) { 745 st->print("%c", (!is_latin1) ? value->char_at(index) : 746 ((jchar) value->byte_at(index)) & 0xff ); 747 } 748 st->print("\""); 749 } 750 751 752 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 753 assert(mirror.not_null() && fd->is_static(), "just checking"); 754 if (fd->has_initial_value()) { 755 BasicType t = fd->field_type(); 756 switch (t) { 757 case T_BYTE: 758 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 759 break; 760 case T_BOOLEAN: 761 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 762 break; 763 case T_CHAR: 764 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 765 break; 766 case T_SHORT: 767 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 768 break; 769 case T_INT: 770 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 771 break; 772 case T_FLOAT: 773 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 774 break; 775 case T_DOUBLE: 776 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 777 break; 778 case T_LONG: 779 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 780 break; 781 case T_OBJECT: 782 { 783 assert(fd->signature() == vmSymbols::string_signature(), 784 "just checking"); 785 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) { 786 // Archive the String field and update the pointer. 787 oop s = mirror()->obj_field(fd->offset()); 788 oop archived_s = StringTable::create_archived_string(s, CHECK); 789 mirror()->obj_field_put(fd->offset(), archived_s); 790 } else { 791 oop string = fd->string_initial_value(CHECK); 792 mirror()->obj_field_put(fd->offset(), string); 793 } 794 } 795 break; 796 default: 797 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 798 "Illegal ConstantValue attribute in class file"); 799 } 800 } 801 } 802 803 804 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 805 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 806 807 // If the offset was read from the shared archive, it was fixed up already 808 if (!k->is_shared()) { 809 if (k->is_instance_klass()) { 810 // During bootstrap, java.lang.Class wasn't loaded so static field 811 // offsets were computed without the size added it. Go back and 812 // update all the static field offsets to included the size. 813 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 814 if (fs.access_flags().is_static()) { 815 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 816 fs.set_offset(real_offset); 817 } 818 } 819 } 820 } 821 822 if (k->is_shared() && k->has_raw_archived_mirror()) { 823 if (HeapShared::open_archive_heap_region_mapped()) { 824 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 825 assert(present, "Missing archived mirror for %s", k->external_name()); 826 return; 827 } else { 828 k->set_java_mirror_handle(NULL); 829 k->clear_has_raw_archived_mirror(); 830 } 831 } 832 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 833 } 834 835 void java_lang_Class::initialize_mirror_fields(Klass* k, 836 Handle mirror, 837 Handle protection_domain, 838 TRAPS) { 839 // Allocate a simple java object for a lock. 840 // This needs to be a java object because during class initialization 841 // it can be held across a java call. 842 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 843 set_init_lock(mirror(), r); 844 845 // Set protection domain also 846 set_protection_domain(mirror(), protection_domain()); 847 848 // Initialize static fields 849 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 850 } 851 852 // Set the java.lang.Module module field in the java_lang_Class mirror 853 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 854 if (module.is_null()) { 855 // During startup, the module may be NULL only if java.base has not been defined yet. 856 // Put the class on the fixup_module_list to patch later when the java.lang.Module 857 // for java.base is known. But note that since we captured the NULL module another 858 // thread may have completed that initialization. 859 860 bool javabase_was_defined = false; 861 { 862 MutexLocker m1(Module_lock, THREAD); 863 // Keep list of classes needing java.base module fixup 864 if (!ModuleEntryTable::javabase_defined()) { 865 assert(k->java_mirror() != NULL, "Class's mirror is null"); 866 k->class_loader_data()->inc_keep_alive(); 867 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 868 fixup_module_field_list()->push(k); 869 } else { 870 javabase_was_defined = true; 871 } 872 } 873 874 // If java.base was already defined then patch this particular class with java.base. 875 if (javabase_was_defined) { 876 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 877 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 878 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 879 Handle javabase_handle(THREAD, javabase_entry->module()); 880 set_module(mirror(), javabase_handle()); 881 } 882 } else { 883 assert(Universe::is_module_initialized() || 884 (ModuleEntryTable::javabase_defined() && 885 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 886 "Incorrect java.lang.Module specification while creating mirror"); 887 set_module(mirror(), module()); 888 } 889 } 890 891 // Statically allocate fixup lists because they always get created. 892 void java_lang_Class::allocate_fixup_lists() { 893 GrowableArray<Klass*>* mirror_list = 894 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 895 set_fixup_mirror_list(mirror_list); 896 897 GrowableArray<Klass*>* module_list = 898 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 899 set_fixup_module_field_list(module_list); 900 } 901 902 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 903 Handle module, Handle protection_domain, TRAPS) { 904 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 905 assert(k->java_mirror() == NULL, "should only assign mirror once"); 906 907 // Use this moment of initialization to cache modifier_flags also, 908 // to support Class.getModifiers(). Instance classes recalculate 909 // the cached flags after the class file is parsed, but before the 910 // class is put into the system dictionary. 911 int computed_modifiers = k->compute_modifier_flags(CHECK); 912 k->set_modifier_flags(computed_modifiers); 913 // Class_klass has to be loaded because it is used to allocate 914 // the mirror. 915 if (SystemDictionary::Class_klass_loaded()) { 916 // Allocate mirror (java.lang.Class instance) 917 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 918 Handle mirror(THREAD, mirror_oop); 919 Handle comp_mirror; 920 921 // Setup indirection from mirror->klass 922 java_lang_Class::set_klass(mirror(), k); 923 924 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 925 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 926 927 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 928 929 // It might also have a component mirror. This mirror must already exist. 930 if (k->is_array_klass()) { 931 if (k->is_typeArray_klass()) { 932 BasicType type = TypeArrayKlass::cast(k)->element_type(); 933 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 934 } else { 935 assert(k->is_objArray_klass(), "Must be"); 936 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 937 assert(element_klass != NULL, "Must have an element klass"); 938 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 939 } 940 assert(comp_mirror() != NULL, "must have a mirror"); 941 942 // Two-way link between the array klass and its component mirror: 943 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 944 set_component_mirror(mirror(), comp_mirror()); 945 // See below for ordering dependencies between field array_klass in component mirror 946 // and java_mirror in this klass. 947 } else { 948 assert(k->is_instance_klass(), "Must be"); 949 950 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 951 if (HAS_PENDING_EXCEPTION) { 952 // If any of the fields throws an exception like OOM remove the klass field 953 // from the mirror so GC doesn't follow it after the klass has been deallocated. 954 // This mirror looks like a primitive type, which logically it is because it 955 // it represents no class. 956 java_lang_Class::set_klass(mirror(), NULL); 957 return; 958 } 959 } 960 961 // set the classLoader field in the java_lang_Class instance 962 assert(class_loader() == k->class_loader(), "should be same"); 963 set_class_loader(mirror(), class_loader()); 964 965 // Setup indirection from klass->mirror 966 // after any exceptions can happen during allocations. 967 k->set_java_mirror(mirror); 968 969 // Set the module field in the java_lang_Class instance. This must be done 970 // after the mirror is set. 971 set_mirror_module_field(k, mirror, module, THREAD); 972 973 if (comp_mirror() != NULL) { 974 // Set after k->java_mirror() is published, because compiled code running 975 // concurrently doesn't expect a k to have a null java_mirror. 976 release_set_array_klass(comp_mirror(), k); 977 } 978 } else { 979 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 980 fixup_mirror_list()->push(k); 981 } 982 } 983 984 #if INCLUDE_CDS_JAVA_HEAP 985 // Clears mirror fields. Static final fields with initial values are reloaded 986 // from constant pool. The object identity hash is in the object header and is 987 // not affected. 988 class ResetMirrorField: public FieldClosure { 989 private: 990 Handle _m; 991 992 public: 993 ResetMirrorField(Handle mirror) : _m(mirror) {} 994 995 void do_field(fieldDescriptor* fd) { 996 assert(DumpSharedSpaces, "dump time only"); 997 assert(_m.not_null(), "Mirror cannot be NULL"); 998 999 if (fd->is_static() && fd->has_initial_value()) { 1000 initialize_static_field(fd, _m, Thread::current()); 1001 return; 1002 } 1003 1004 BasicType ft = fd->field_type(); 1005 switch (ft) { 1006 case T_BYTE: 1007 _m()->byte_field_put(fd->offset(), 0); 1008 break; 1009 case T_CHAR: 1010 _m()->char_field_put(fd->offset(), 0); 1011 break; 1012 case T_DOUBLE: 1013 _m()->double_field_put(fd->offset(), 0); 1014 break; 1015 case T_FLOAT: 1016 _m()->float_field_put(fd->offset(), 0); 1017 break; 1018 case T_INT: 1019 _m()->int_field_put(fd->offset(), 0); 1020 break; 1021 case T_LONG: 1022 _m()->long_field_put(fd->offset(), 0); 1023 break; 1024 case T_SHORT: 1025 _m()->short_field_put(fd->offset(), 0); 1026 break; 1027 case T_BOOLEAN: 1028 _m()->bool_field_put(fd->offset(), false); 1029 break; 1030 case T_ARRAY: 1031 case T_OBJECT: { 1032 // It might be useful to cache the String field, but 1033 // for now just clear out any reference field 1034 oop o = _m()->obj_field(fd->offset()); 1035 _m()->obj_field_put(fd->offset(), NULL); 1036 break; 1037 } 1038 default: 1039 ShouldNotReachHere(); 1040 break; 1041 } 1042 } 1043 }; 1044 1045 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1046 assert(HeapShared::is_heap_object_archiving_allowed(), 1047 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1048 1049 for (int t = 0; t <= T_VOID; t++) { 1050 oop m = Universe::_mirrors[t]; 1051 if (m != NULL) { 1052 // Update the field at _array_klass_offset to point to the relocated array klass. 1053 oop archived_m = HeapShared::archive_heap_object(m, THREAD); 1054 assert(archived_m != NULL, "sanity"); 1055 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1056 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1057 if (ak != NULL) { 1058 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1059 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1060 } 1061 1062 // Clear the fields. Just to be safe 1063 Klass *k = m->klass(); 1064 Handle archived_mirror_h(THREAD, archived_m); 1065 ResetMirrorField reset(archived_mirror_h); 1066 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1067 1068 log_trace(cds, heap, mirror)( 1069 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1070 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1071 1072 Universe::_mirrors[t] = archived_m; 1073 } 1074 } 1075 1076 assert(Universe::_mirrors[T_INT] != NULL && 1077 Universe::_mirrors[T_FLOAT] != NULL && 1078 Universe::_mirrors[T_DOUBLE] != NULL && 1079 Universe::_mirrors[T_BYTE] != NULL && 1080 Universe::_mirrors[T_BOOLEAN] != NULL && 1081 Universe::_mirrors[T_CHAR] != NULL && 1082 Universe::_mirrors[T_LONG] != NULL && 1083 Universe::_mirrors[T_SHORT] != NULL && 1084 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1085 1086 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1087 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1088 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1089 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1090 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1091 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1092 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1093 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1094 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1095 } 1096 1097 // 1098 // After the mirror object is successfully archived, the archived 1099 // klass is set with _has_archived_raw_mirror flag. 1100 // 1101 // The _has_archived_raw_mirror flag is cleared at runtime when the 1102 // archived mirror is restored. If archived java heap data cannot 1103 // be used at runtime, new mirror object is created for the shared 1104 // class. The _has_archived_raw_mirror is cleared also during the process. 1105 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1106 assert(HeapShared::is_heap_object_archiving_allowed(), 1107 "HeapShared::is_heap_object_archiving_allowed() must be true"); 1108 1109 // Mirror is already archived 1110 if (k->has_raw_archived_mirror()) { 1111 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1112 return k->archived_java_mirror_raw(); 1113 } 1114 1115 // No mirror 1116 oop mirror = k->java_mirror(); 1117 if (mirror == NULL) { 1118 return NULL; 1119 } 1120 1121 if (k->is_instance_klass()) { 1122 InstanceKlass *ik = InstanceKlass::cast(k); 1123 assert(ik->signers() == NULL, "class with signer should have been excluded"); 1124 1125 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1126 ik->is_shared_app_class())) { 1127 // Archiving mirror for classes from non-builtin loaders is not 1128 // supported. Clear the _java_mirror within the archived class. 1129 k->set_java_mirror_handle(NULL); 1130 return NULL; 1131 } 1132 } 1133 1134 // Now start archiving the mirror object 1135 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD); 1136 if (archived_mirror == NULL) { 1137 return NULL; 1138 } 1139 1140 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1141 if (archived_mirror == NULL) { 1142 return NULL; 1143 } 1144 1145 k->set_archived_java_mirror_raw(archived_mirror); 1146 1147 k->set_has_raw_archived_mirror(); 1148 1149 ResourceMark rm; 1150 log_trace(cds, heap, mirror)( 1151 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1152 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1153 1154 return archived_mirror; 1155 } 1156 1157 // The process is based on create_mirror(). 1158 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1159 oop archived_mirror, 1160 Thread *THREAD) { 1161 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1162 // to archived metadata and objects below. 1163 Klass *c = archived_mirror->klass(); 1164 Handle archived_mirror_h(THREAD, archived_mirror); 1165 ResetMirrorField reset(archived_mirror_h); 1166 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1167 1168 if (k->is_array_klass()) { 1169 oop archived_comp_mirror; 1170 if (k->is_typeArray_klass()) { 1171 // The primitive type mirrors are already archived. Get the archived mirror. 1172 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1173 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror); 1174 assert(archived_comp_mirror != NULL, "Must be"); 1175 } else { 1176 assert(k->is_objArray_klass(), "Must be"); 1177 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1178 assert(element_klass != NULL, "Must have an element klass"); 1179 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1180 if (archived_comp_mirror == NULL) { 1181 return NULL; 1182 } 1183 } 1184 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1185 } else { 1186 assert(k->is_instance_klass(), "Must be"); 1187 1188 // Reset local static fields in the mirror 1189 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1190 1191 java_lang_Class:set_init_lock(archived_mirror, NULL); 1192 1193 set_protection_domain(archived_mirror, NULL); 1194 } 1195 1196 // clear class loader and mirror_module_field 1197 set_class_loader(archived_mirror, NULL); 1198 set_module(archived_mirror, NULL); 1199 1200 // The archived mirror's field at _klass_offset is still pointing to the original 1201 // klass. Updated the field in the archived mirror to point to the relocated 1202 // klass in the archive. 1203 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1204 log_debug(cds, heap, mirror)( 1205 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1206 p2i(as_Klass(mirror)), p2i(reloc_k)); 1207 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1208 1209 // The field at _array_klass_offset is pointing to the original one dimension 1210 // higher array klass if exists. Relocate the pointer. 1211 Klass *arr = array_klass_acquire(mirror); 1212 if (arr != NULL) { 1213 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1214 log_debug(cds, heap, mirror)( 1215 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1216 p2i(arr), p2i(reloc_arr)); 1217 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1218 } 1219 return archived_mirror; 1220 } 1221 1222 // Returns true if the mirror is updated, false if no archived mirror 1223 // data is present. After the archived mirror object is restored, the 1224 // shared klass' _has_raw_archived_mirror flag is cleared. 1225 bool java_lang_Class::restore_archived_mirror(Klass *k, 1226 Handle class_loader, Handle module, 1227 Handle protection_domain, TRAPS) { 1228 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1229 // see more details in SystemDictionary::resolve_well_known_classes(). 1230 if (!SystemDictionary::Class_klass_loaded()) { 1231 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1232 fixup_mirror_list()->push(k); 1233 return true; 1234 } 1235 1236 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1237 1238 if (m == NULL) { 1239 return false; 1240 } 1241 1242 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1243 1244 // mirror is archived, restore 1245 assert(HeapShared::is_archived_object(m), "must be archived mirror object"); 1246 Handle mirror(THREAD, m); 1247 1248 if (!k->is_array_klass()) { 1249 // - local static final fields with initial values were initialized at dump time 1250 1251 // create the init_lock 1252 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1253 set_init_lock(mirror(), r); 1254 1255 if (protection_domain.not_null()) { 1256 set_protection_domain(mirror(), protection_domain()); 1257 } 1258 } 1259 1260 assert(class_loader() == k->class_loader(), "should be same"); 1261 if (class_loader.not_null()) { 1262 set_class_loader(mirror(), class_loader()); 1263 } 1264 1265 k->set_java_mirror(mirror); 1266 k->clear_has_raw_archived_mirror(); 1267 1268 set_mirror_module_field(k, mirror, module, THREAD); 1269 1270 ResourceMark rm; 1271 log_trace(cds, heap, mirror)( 1272 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1273 1274 return true; 1275 } 1276 #endif // INCLUDE_CDS_JAVA_HEAP 1277 1278 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1279 assert(_module_offset != 0, "must have been computed already"); 1280 java_lang_Class::set_module(k->java_mirror(), module()); 1281 } 1282 1283 int java_lang_Class::oop_size(oop java_class) { 1284 assert(_oop_size_offset != 0, "must be set"); 1285 int size = java_class->int_field(_oop_size_offset); 1286 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1287 return size; 1288 } 1289 1290 1291 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1292 assert(_oop_size_offset != 0, "must be set"); 1293 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1294 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1295 } 1296 1297 int java_lang_Class::static_oop_field_count(oop java_class) { 1298 assert(_static_oop_field_count_offset != 0, "must be set"); 1299 return java_class->int_field(_static_oop_field_count_offset); 1300 } 1301 1302 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1303 assert(_static_oop_field_count_offset != 0, "must be set"); 1304 return java_class->int_field_raw(_static_oop_field_count_offset); 1305 } 1306 1307 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1308 assert(_static_oop_field_count_offset != 0, "must be set"); 1309 java_class->int_field_put(_static_oop_field_count_offset, size); 1310 } 1311 1312 oop java_lang_Class::protection_domain(oop java_class) { 1313 assert(_protection_domain_offset != 0, "must be set"); 1314 return java_class->obj_field(_protection_domain_offset); 1315 } 1316 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1317 assert(_protection_domain_offset != 0, "must be set"); 1318 java_class->obj_field_put(_protection_domain_offset, pd); 1319 } 1320 1321 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1322 assert(_component_mirror_offset != 0, "must be set"); 1323 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1324 } 1325 oop java_lang_Class::component_mirror(oop java_class) { 1326 assert(_component_mirror_offset != 0, "must be set"); 1327 return java_class->obj_field(_component_mirror_offset); 1328 } 1329 1330 oop java_lang_Class::init_lock(oop java_class) { 1331 assert(_init_lock_offset != 0, "must be set"); 1332 return java_class->obj_field(_init_lock_offset); 1333 } 1334 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1335 assert(_init_lock_offset != 0, "must be set"); 1336 java_class->obj_field_put(_init_lock_offset, init_lock); 1337 } 1338 1339 objArrayOop java_lang_Class::signers(oop java_class) { 1340 assert(_signers_offset != 0, "must be set"); 1341 return (objArrayOop)java_class->obj_field(_signers_offset); 1342 } 1343 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1344 assert(_signers_offset != 0, "must be set"); 1345 java_class->obj_field_put(_signers_offset, (oop)signers); 1346 } 1347 1348 1349 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1350 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1351 if (_class_loader_offset != 0) { 1352 java_class->obj_field_put(_class_loader_offset, loader); 1353 } 1354 } 1355 1356 oop java_lang_Class::class_loader(oop java_class) { 1357 assert(_class_loader_offset != 0, "must be set"); 1358 return java_class->obj_field(_class_loader_offset); 1359 } 1360 1361 oop java_lang_Class::module(oop java_class) { 1362 assert(_module_offset != 0, "must be set"); 1363 return java_class->obj_field(_module_offset); 1364 } 1365 1366 void java_lang_Class::set_module(oop java_class, oop module) { 1367 assert(_module_offset != 0, "must be set"); 1368 java_class->obj_field_put(_module_offset, module); 1369 } 1370 1371 oop java_lang_Class::name(Handle java_class, TRAPS) { 1372 assert(_name_offset != 0, "must be set"); 1373 oop o = java_class->obj_field(_name_offset); 1374 if (o == NULL) { 1375 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD); 1376 java_class->obj_field_put(_name_offset, o); 1377 } 1378 return o; 1379 } 1380 1381 oop java_lang_Class::source_file(oop java_class) { 1382 assert(_source_file_offset != 0, "must be set"); 1383 return java_class->obj_field(_source_file_offset); 1384 } 1385 1386 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1387 assert(_source_file_offset != 0, "must be set"); 1388 java_class->obj_field_put(_source_file_offset, source_file); 1389 } 1390 1391 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1392 // This should be improved by adding a field at the Java level or by 1393 // introducing a new VM klass (see comment in ClassFileParser) 1394 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1395 if (type != T_VOID) { 1396 Klass* aklass = Universe::typeArrayKlassObj(type); 1397 assert(aklass != NULL, "correct bootstrap"); 1398 release_set_array_klass(java_class, aklass); 1399 } 1400 #ifdef ASSERT 1401 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1402 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1403 #endif 1404 return java_class; 1405 } 1406 1407 1408 Klass* java_lang_Class::as_Klass(oop java_class) { 1409 //%note memory_2 1410 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1411 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1412 assert(k == NULL || k->is_klass(), "type check"); 1413 return k; 1414 } 1415 1416 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1417 //%note memory_2 1418 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1419 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1420 assert(k == NULL || k->is_klass(), "type check"); 1421 return k; 1422 } 1423 1424 1425 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1426 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1427 java_class->metadata_field_put(_klass_offset, klass); 1428 } 1429 1430 1431 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1433 Symbol* name = NULL; 1434 bool is_instance = false; 1435 if (is_primitive(java_class)) { 1436 name = vmSymbols::type_signature(primitive_type(java_class)); 1437 } else { 1438 Klass* k = as_Klass(java_class); 1439 is_instance = k->is_instance_klass(); 1440 name = k->name(); 1441 } 1442 if (name == NULL) { 1443 st->print("<null>"); 1444 return; 1445 } 1446 if (is_instance) st->print("L"); 1447 st->write((char*) name->base(), (int) name->utf8_length()); 1448 if (is_instance) st->print(";"); 1449 } 1450 1451 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1452 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1453 Symbol* name; 1454 if (is_primitive(java_class)) { 1455 name = vmSymbols::type_signature(primitive_type(java_class)); 1456 // Because this can create a new symbol, the caller has to decrement 1457 // the refcount, so make adjustment here and below for symbols returned 1458 // that are not created or incremented due to a successful lookup. 1459 name->increment_refcount(); 1460 } else { 1461 Klass* k = as_Klass(java_class); 1462 if (!k->is_instance_klass()) { 1463 name = k->name(); 1464 name->increment_refcount(); 1465 } else { 1466 ResourceMark rm; 1467 const char* sigstr = k->signature_name(); 1468 int siglen = (int) strlen(sigstr); 1469 if (!intern_if_not_found) { 1470 name = SymbolTable::probe(sigstr, siglen); 1471 } else { 1472 name = SymbolTable::new_symbol(sigstr, siglen); 1473 } 1474 } 1475 } 1476 return name; 1477 } 1478 1479 // Returns the Java name for this Java mirror (Resource allocated) 1480 // See Klass::external_name(). 1481 // For primitive type Java mirrors, its type name is returned. 1482 const char* java_lang_Class::as_external_name(oop java_class) { 1483 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1484 const char* name = NULL; 1485 if (is_primitive(java_class)) { 1486 name = type2name(primitive_type(java_class)); 1487 } else { 1488 name = as_Klass(java_class)->external_name(); 1489 } 1490 if (name == NULL) { 1491 name = "<null>"; 1492 } 1493 return name; 1494 } 1495 1496 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1497 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1498 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1499 return k; 1500 } 1501 1502 1503 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1504 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1505 java_class->release_metadata_field_put(_array_klass_offset, klass); 1506 } 1507 1508 1509 BasicType java_lang_Class::primitive_type(oop java_class) { 1510 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1511 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1512 BasicType type = T_VOID; 1513 if (ak != NULL) { 1514 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1515 type = ArrayKlass::cast(ak)->element_type(); 1516 } else { 1517 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1518 } 1519 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1520 return type; 1521 } 1522 1523 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1524 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1525 if (is_primitive(java_class)) { 1526 if (reference_klass != NULL) 1527 (*reference_klass) = NULL; 1528 return primitive_type(java_class); 1529 } else { 1530 if (reference_klass != NULL) 1531 (*reference_klass) = as_Klass(java_class); 1532 return T_OBJECT; 1533 } 1534 } 1535 1536 1537 oop java_lang_Class::primitive_mirror(BasicType t) { 1538 oop mirror = Universe::java_mirror(t); 1539 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1540 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1541 return mirror; 1542 } 1543 1544 bool java_lang_Class::offsets_computed = false; 1545 int java_lang_Class::classRedefinedCount_offset = -1; 1546 1547 #define CLASS_FIELDS_DO(macro) \ 1548 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1549 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1550 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1551 macro(_module_offset, k, "module", module_signature, false); \ 1552 macro(_name_offset, k, "name", string_signature, false); \ 1553 1554 void java_lang_Class::compute_offsets() { 1555 if (offsets_computed) { 1556 return; 1557 } 1558 1559 offsets_computed = true; 1560 1561 InstanceKlass* k = SystemDictionary::Class_klass(); 1562 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1563 1564 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1565 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1566 // GC treats them the same. 1567 _init_lock_offset = _component_mirror_offset; 1568 1569 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1570 } 1571 1572 #if INCLUDE_CDS 1573 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1574 f->do_bool(&offsets_computed); 1575 f->do_u4((u4*)&_init_lock_offset); 1576 1577 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1578 1579 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1580 } 1581 #endif 1582 1583 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1584 if (classRedefinedCount_offset == -1) { 1585 // If we don't have an offset for it then just return -1 as a marker. 1586 return -1; 1587 } 1588 1589 return the_class_mirror->int_field(classRedefinedCount_offset); 1590 } 1591 1592 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1593 if (classRedefinedCount_offset == -1) { 1594 // If we don't have an offset for it then nothing to set. 1595 return; 1596 } 1597 1598 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1599 } 1600 1601 1602 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1603 // platform thread structure, and a eetop offset which was used for thread 1604 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1605 // merged, so in the HotSpot VM we just use the eetop field for the thread 1606 // instead of the privateInfo_offset. 1607 // 1608 // Note: The stackSize field is only present starting in 1.4. 1609 1610 int java_lang_Thread::_name_offset = 0; 1611 int java_lang_Thread::_group_offset = 0; 1612 int java_lang_Thread::_contextClassLoader_offset = 0; 1613 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1614 int java_lang_Thread::_priority_offset = 0; 1615 int java_lang_Thread::_eetop_offset = 0; 1616 int java_lang_Thread::_daemon_offset = 0; 1617 int java_lang_Thread::_stillborn_offset = 0; 1618 int java_lang_Thread::_stackSize_offset = 0; 1619 int java_lang_Thread::_tid_offset = 0; 1620 int java_lang_Thread::_thread_status_offset = 0; 1621 int java_lang_Thread::_park_blocker_offset = 0; 1622 1623 #define THREAD_FIELDS_DO(macro) \ 1624 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1625 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1626 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1627 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1628 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1629 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1630 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1631 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1632 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1633 macro(_tid_offset, k, "tid", long_signature, false); \ 1634 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1635 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false) 1636 1637 void java_lang_Thread::compute_offsets() { 1638 assert(_group_offset == 0, "offsets should be initialized only once"); 1639 1640 InstanceKlass* k = SystemDictionary::Thread_klass(); 1641 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1642 } 1643 1644 #if INCLUDE_CDS 1645 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1646 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1647 } 1648 #endif 1649 1650 JavaThread* java_lang_Thread::thread(oop java_thread) { 1651 return (JavaThread*)java_thread->address_field(_eetop_offset); 1652 } 1653 1654 1655 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1656 java_thread->address_field_put(_eetop_offset, (address)thread); 1657 } 1658 1659 1660 oop java_lang_Thread::name(oop java_thread) { 1661 return java_thread->obj_field(_name_offset); 1662 } 1663 1664 1665 void java_lang_Thread::set_name(oop java_thread, oop name) { 1666 java_thread->obj_field_put(_name_offset, name); 1667 } 1668 1669 1670 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1671 return (ThreadPriority)java_thread->int_field(_priority_offset); 1672 } 1673 1674 1675 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1676 java_thread->int_field_put(_priority_offset, priority); 1677 } 1678 1679 1680 oop java_lang_Thread::threadGroup(oop java_thread) { 1681 return java_thread->obj_field(_group_offset); 1682 } 1683 1684 1685 bool java_lang_Thread::is_stillborn(oop java_thread) { 1686 return java_thread->bool_field(_stillborn_offset) != 0; 1687 } 1688 1689 1690 // We never have reason to turn the stillborn bit off 1691 void java_lang_Thread::set_stillborn(oop java_thread) { 1692 java_thread->bool_field_put(_stillborn_offset, true); 1693 } 1694 1695 1696 bool java_lang_Thread::is_alive(oop java_thread) { 1697 JavaThread* thr = java_lang_Thread::thread(java_thread); 1698 return (thr != NULL); 1699 } 1700 1701 1702 bool java_lang_Thread::is_daemon(oop java_thread) { 1703 return java_thread->bool_field(_daemon_offset) != 0; 1704 } 1705 1706 1707 void java_lang_Thread::set_daemon(oop java_thread) { 1708 java_thread->bool_field_put(_daemon_offset, true); 1709 } 1710 1711 oop java_lang_Thread::context_class_loader(oop java_thread) { 1712 return java_thread->obj_field(_contextClassLoader_offset); 1713 } 1714 1715 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1716 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1717 } 1718 1719 1720 jlong java_lang_Thread::stackSize(oop java_thread) { 1721 return java_thread->long_field(_stackSize_offset); 1722 } 1723 1724 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1725 void java_lang_Thread::set_thread_status(oop java_thread, 1726 java_lang_Thread::ThreadStatus status) { 1727 java_thread->int_field_put(_thread_status_offset, status); 1728 } 1729 1730 // Read thread status value from threadStatus field in java.lang.Thread java class. 1731 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1732 // Make sure the caller is operating on behalf of the VM or is 1733 // running VM code (state == _thread_in_vm). 1734 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1735 JavaThread::current()->thread_state() == _thread_in_vm, 1736 "Java Thread is not running in vm"); 1737 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1738 } 1739 1740 1741 jlong java_lang_Thread::thread_id(oop java_thread) { 1742 return java_thread->long_field(_tid_offset); 1743 } 1744 1745 oop java_lang_Thread::park_blocker(oop java_thread) { 1746 return java_thread->obj_field(_park_blocker_offset); 1747 } 1748 1749 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1750 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1751 switch (status) { 1752 case NEW : return "NEW"; 1753 case RUNNABLE : return "RUNNABLE"; 1754 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1755 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1756 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1757 case PARKED : return "WAITING (parking)"; 1758 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1759 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1760 case TERMINATED : return "TERMINATED"; 1761 default : return "UNKNOWN"; 1762 }; 1763 } 1764 int java_lang_ThreadGroup::_parent_offset = 0; 1765 int java_lang_ThreadGroup::_name_offset = 0; 1766 int java_lang_ThreadGroup::_threads_offset = 0; 1767 int java_lang_ThreadGroup::_groups_offset = 0; 1768 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1769 int java_lang_ThreadGroup::_destroyed_offset = 0; 1770 int java_lang_ThreadGroup::_daemon_offset = 0; 1771 int java_lang_ThreadGroup::_nthreads_offset = 0; 1772 int java_lang_ThreadGroup::_ngroups_offset = 0; 1773 1774 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1775 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1776 return java_thread_group->obj_field(_parent_offset); 1777 } 1778 1779 // ("name as oop" accessor is not necessary) 1780 1781 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1782 oop name = java_thread_group->obj_field(_name_offset); 1783 // ThreadGroup.name can be null 1784 if (name != NULL) { 1785 return java_lang_String::as_utf8_string(name); 1786 } 1787 return NULL; 1788 } 1789 1790 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1791 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1792 return java_thread_group->int_field(_nthreads_offset); 1793 } 1794 1795 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1796 oop threads = java_thread_group->obj_field(_threads_offset); 1797 assert(threads != NULL, "threadgroups should have threads"); 1798 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1799 return objArrayOop(threads); 1800 } 1801 1802 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1803 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1804 return java_thread_group->int_field(_ngroups_offset); 1805 } 1806 1807 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1808 oop groups = java_thread_group->obj_field(_groups_offset); 1809 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1810 return objArrayOop(groups); 1811 } 1812 1813 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1815 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1816 } 1817 1818 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1819 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1820 return java_thread_group->bool_field(_destroyed_offset) != 0; 1821 } 1822 1823 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1824 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1825 return java_thread_group->bool_field(_daemon_offset) != 0; 1826 } 1827 1828 #define THREADGROUP_FIELDS_DO(macro) \ 1829 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1830 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1831 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1832 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1833 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1834 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1835 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1836 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1837 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1838 1839 void java_lang_ThreadGroup::compute_offsets() { 1840 assert(_parent_offset == 0, "offsets should be initialized only once"); 1841 1842 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1843 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1844 } 1845 1846 #if INCLUDE_CDS 1847 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1848 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1849 } 1850 #endif 1851 1852 #define THROWABLE_FIELDS_DO(macro) \ 1853 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1854 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1855 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1856 macro(depth_offset, k, "depth", int_signature, false); \ 1857 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1858 1859 void java_lang_Throwable::compute_offsets() { 1860 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1861 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1862 } 1863 1864 #if INCLUDE_CDS 1865 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1866 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1867 } 1868 #endif 1869 1870 oop java_lang_Throwable::unassigned_stacktrace() { 1871 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1872 oop base = ik->static_field_base_raw(); 1873 return base->obj_field(static_unassigned_stacktrace_offset); 1874 } 1875 1876 oop java_lang_Throwable::backtrace(oop throwable) { 1877 return throwable->obj_field_acquire(backtrace_offset); 1878 } 1879 1880 1881 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1882 throwable->release_obj_field_put(backtrace_offset, value); 1883 } 1884 1885 int java_lang_Throwable::depth(oop throwable) { 1886 return throwable->int_field(depth_offset); 1887 } 1888 1889 void java_lang_Throwable::set_depth(oop throwable, int value) { 1890 throwable->int_field_put(depth_offset, value); 1891 } 1892 1893 oop java_lang_Throwable::message(oop throwable) { 1894 return throwable->obj_field(detailMessage_offset); 1895 } 1896 1897 1898 // Return Symbol for detailed_message or NULL 1899 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1900 PRESERVE_EXCEPTION_MARK; // Keep original exception 1901 oop detailed_message = java_lang_Throwable::message(throwable); 1902 if (detailed_message != NULL) { 1903 return java_lang_String::as_symbol(detailed_message); 1904 } 1905 return NULL; 1906 } 1907 1908 void java_lang_Throwable::set_message(oop throwable, oop value) { 1909 throwable->obj_field_put(detailMessage_offset, value); 1910 } 1911 1912 1913 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1914 throwable->obj_field_put(stackTrace_offset, st_element_array); 1915 } 1916 1917 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1918 set_stacktrace(throwable, NULL); 1919 } 1920 1921 1922 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1923 ResourceMark rm; 1924 Klass* k = throwable->klass(); 1925 assert(k != NULL, "just checking"); 1926 st->print("%s", k->external_name()); 1927 oop msg = message(throwable); 1928 if (msg != NULL) { 1929 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1930 } 1931 } 1932 1933 // After this many redefines, the stack trace is unreliable. 1934 const int MAX_VERSION = USHRT_MAX; 1935 1936 static inline bool version_matches(Method* method, int version) { 1937 assert(version < MAX_VERSION, "version is too big"); 1938 return method != NULL && (method->constants()->version() == version); 1939 } 1940 1941 1942 // This class provides a simple wrapper over the internal structure of 1943 // exception backtrace to insulate users of the backtrace from needing 1944 // to know what it looks like. 1945 class BacktraceBuilder: public StackObj { 1946 friend class BacktraceIterator; 1947 private: 1948 Handle _backtrace; 1949 objArrayOop _head; 1950 typeArrayOop _methods; 1951 typeArrayOop _bcis; 1952 objArrayOop _mirrors; 1953 typeArrayOop _names; // needed to insulate method name against redefinition 1954 int _index; 1955 NoSafepointVerifier _nsv; 1956 1957 enum { 1958 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1959 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1960 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1961 trace_names_offset = java_lang_Throwable::trace_names_offset, 1962 trace_next_offset = java_lang_Throwable::trace_next_offset, 1963 trace_size = java_lang_Throwable::trace_size, 1964 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1965 }; 1966 1967 // get info out of chunks 1968 static typeArrayOop get_methods(objArrayHandle chunk) { 1969 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1970 assert(methods != NULL, "method array should be initialized in backtrace"); 1971 return methods; 1972 } 1973 static typeArrayOop get_bcis(objArrayHandle chunk) { 1974 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1975 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1976 return bcis; 1977 } 1978 static objArrayOop get_mirrors(objArrayHandle chunk) { 1979 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1980 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1981 return mirrors; 1982 } 1983 static typeArrayOop get_names(objArrayHandle chunk) { 1984 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1985 assert(names != NULL, "names array should be initialized in backtrace"); 1986 return names; 1987 } 1988 1989 public: 1990 1991 // constructor for new backtrace 1992 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 1993 expand(CHECK); 1994 _backtrace = Handle(THREAD, _head); 1995 _index = 0; 1996 } 1997 1998 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1999 _methods = get_methods(backtrace); 2000 _bcis = get_bcis(backtrace); 2001 _mirrors = get_mirrors(backtrace); 2002 _names = get_names(backtrace); 2003 assert(_methods->length() == _bcis->length() && 2004 _methods->length() == _mirrors->length() && 2005 _mirrors->length() == _names->length(), 2006 "method and source information arrays should match"); 2007 2008 // head is the preallocated backtrace 2009 _head = backtrace(); 2010 _backtrace = Handle(thread, _head); 2011 _index = 0; 2012 } 2013 2014 void expand(TRAPS) { 2015 objArrayHandle old_head(THREAD, _head); 2016 PauseNoSafepointVerifier pnsv(&_nsv); 2017 2018 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2019 objArrayHandle new_head(THREAD, head); 2020 2021 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2022 typeArrayHandle new_methods(THREAD, methods); 2023 2024 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2025 typeArrayHandle new_bcis(THREAD, bcis); 2026 2027 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2028 objArrayHandle new_mirrors(THREAD, mirrors); 2029 2030 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2031 typeArrayHandle new_names(THREAD, names); 2032 2033 if (!old_head.is_null()) { 2034 old_head->obj_at_put(trace_next_offset, new_head()); 2035 } 2036 new_head->obj_at_put(trace_methods_offset, new_methods()); 2037 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2038 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2039 new_head->obj_at_put(trace_names_offset, new_names()); 2040 2041 _head = new_head(); 2042 _methods = new_methods(); 2043 _bcis = new_bcis(); 2044 _mirrors = new_mirrors(); 2045 _names = new_names(); 2046 _index = 0; 2047 } 2048 2049 oop backtrace() { 2050 return _backtrace(); 2051 } 2052 2053 inline void push(Method* method, int bci, TRAPS) { 2054 // Smear the -1 bci to 0 since the array only holds unsigned 2055 // shorts. The later line number lookup would just smear the -1 2056 // to a 0 even if it could be recorded. 2057 if (bci == SynchronizationEntryBCI) bci = 0; 2058 2059 if (_index >= trace_chunk_size) { 2060 methodHandle mhandle(THREAD, method); 2061 expand(CHECK); 2062 method = mhandle(); 2063 } 2064 2065 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2066 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2067 2068 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2069 // klass owning the symbols alive so their refcounts aren't decremented. 2070 Symbol* name = method->name(); 2071 _names->symbol_at_put(_index, name); 2072 2073 // We need to save the mirrors in the backtrace to keep the class 2074 // from being unloaded while we still have this stack trace. 2075 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2076 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2077 _index++; 2078 } 2079 2080 }; 2081 2082 struct BacktraceElement : public StackObj { 2083 int _method_id; 2084 int _bci; 2085 int _version; 2086 Symbol* _name; 2087 Handle _mirror; 2088 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2089 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2090 }; 2091 2092 class BacktraceIterator : public StackObj { 2093 int _index; 2094 objArrayHandle _result; 2095 objArrayHandle _mirrors; 2096 typeArrayHandle _methods; 2097 typeArrayHandle _bcis; 2098 typeArrayHandle _names; 2099 2100 void init(objArrayHandle result, Thread* thread) { 2101 // Get method id, bci, version and mirror from chunk 2102 _result = result; 2103 if (_result.not_null()) { 2104 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2105 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2106 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2107 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2108 _index = 0; 2109 } 2110 } 2111 public: 2112 BacktraceIterator(objArrayHandle result, Thread* thread) { 2113 init(result, thread); 2114 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2115 } 2116 2117 BacktraceElement next(Thread* thread) { 2118 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2119 _methods->ushort_at(_index), 2120 Backtrace::version_at(_bcis->int_at(_index)), 2121 Backtrace::bci_at(_bcis->int_at(_index)), 2122 _names->symbol_at(_index)); 2123 _index++; 2124 2125 if (_index >= java_lang_Throwable::trace_chunk_size) { 2126 int next_offset = java_lang_Throwable::trace_next_offset; 2127 // Get next chunk 2128 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2129 init(result, thread); 2130 } 2131 return e; 2132 } 2133 2134 bool repeat() { 2135 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2136 } 2137 }; 2138 2139 2140 // Print stack trace element to resource allocated buffer 2141 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2142 int version, int bci, Symbol* name) { 2143 ResourceMark rm; 2144 2145 // Get strings and string lengths 2146 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2147 const char* klass_name = holder->external_name(); 2148 int buf_len = (int)strlen(klass_name); 2149 2150 char* method_name = name->as_C_string(); 2151 buf_len += (int)strlen(method_name); 2152 2153 char* source_file_name = NULL; 2154 Symbol* source = Backtrace::get_source_file_name(holder, version); 2155 if (source != NULL) { 2156 source_file_name = source->as_C_string(); 2157 buf_len += (int)strlen(source_file_name); 2158 } 2159 2160 char *module_name = NULL, *module_version = NULL; 2161 ModuleEntry* module = holder->module(); 2162 if (module->is_named()) { 2163 module_name = module->name()->as_C_string(); 2164 buf_len += (int)strlen(module_name); 2165 if (module->version() != NULL) { 2166 module_version = module->version()->as_C_string(); 2167 buf_len += (int)strlen(module_version); 2168 } 2169 } 2170 2171 // Allocate temporary buffer with extra space for formatting and line number 2172 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2173 2174 // Print stack trace line in buffer 2175 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2176 2177 // Print module information 2178 if (module_name != NULL) { 2179 if (module_version != NULL) { 2180 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2181 } else { 2182 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2183 } 2184 } 2185 2186 // The method can be NULL if the requested class version is gone 2187 Method* method = holder->method_with_orig_idnum(method_id, version); 2188 if (!version_matches(method, version)) { 2189 strcat(buf, "Redefined)"); 2190 } else { 2191 int line_number = Backtrace::get_line_number(method, bci); 2192 if (line_number == -2) { 2193 strcat(buf, "Native Method)"); 2194 } else { 2195 if (source_file_name != NULL && (line_number != -1)) { 2196 // Sourcename and linenumber 2197 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2198 } else if (source_file_name != NULL) { 2199 // Just sourcename 2200 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2201 } else { 2202 // Neither sourcename nor linenumber 2203 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2204 } 2205 CompiledMethod* nm = method->code(); 2206 if (WizardMode && nm != NULL) { 2207 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2208 } 2209 } 2210 } 2211 2212 st->print_cr("%s", buf); 2213 } 2214 2215 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2216 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2217 int method_id = method->orig_method_idnum(); 2218 int version = method->constants()->version(); 2219 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2220 } 2221 2222 /** 2223 * Print the throwable message and its stack trace plus all causes by walking the 2224 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2225 */ 2226 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2227 // First, print the message. 2228 print(throwable(), st); 2229 st->cr(); 2230 2231 // Now print the stack trace. 2232 Thread* THREAD = Thread::current(); 2233 while (throwable.not_null()) { 2234 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2235 if (result.is_null()) { 2236 st->print_raw_cr("\t<<no stack trace available>>"); 2237 return; 2238 } 2239 BacktraceIterator iter(result, THREAD); 2240 2241 while (iter.repeat()) { 2242 BacktraceElement bte = iter.next(THREAD); 2243 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2244 } 2245 { 2246 // Call getCause() which doesn't necessarily return the _cause field. 2247 EXCEPTION_MARK; 2248 JavaValue cause(T_OBJECT); 2249 JavaCalls::call_virtual(&cause, 2250 throwable, 2251 throwable->klass(), 2252 vmSymbols::getCause_name(), 2253 vmSymbols::void_throwable_signature(), 2254 THREAD); 2255 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2256 if (HAS_PENDING_EXCEPTION) { 2257 CLEAR_PENDING_EXCEPTION; 2258 throwable = Handle(); 2259 } else { 2260 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2261 if (throwable.not_null()) { 2262 st->print("Caused by: "); 2263 print(throwable(), st); 2264 st->cr(); 2265 } 2266 } 2267 } 2268 } 2269 } 2270 2271 /** 2272 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2273 */ 2274 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2275 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2276 JavaValue result(T_VOID); 2277 JavaCalls::call_virtual(&result, 2278 throwable, 2279 SystemDictionary::Throwable_klass(), 2280 vmSymbols::printStackTrace_name(), 2281 vmSymbols::void_method_signature(), 2282 THREAD); 2283 } 2284 2285 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2286 if (!StackTraceInThrowable) return; 2287 ResourceMark rm(THREAD); 2288 2289 // Start out by clearing the backtrace for this object, in case the VM 2290 // runs out of memory while allocating the stack trace 2291 set_backtrace(throwable(), NULL); 2292 // Clear lazily constructed Java level stacktrace if refilling occurs 2293 // This is unnecessary in 1.7+ but harmless 2294 clear_stacktrace(throwable()); 2295 2296 int max_depth = MaxJavaStackTraceDepth; 2297 JavaThread* thread = (JavaThread*)THREAD; 2298 2299 BacktraceBuilder bt(CHECK); 2300 2301 // If there is no Java frame just return the method that was being called 2302 // with bci 0 2303 if (!thread->has_last_Java_frame()) { 2304 if (max_depth >= 1 && method() != NULL) { 2305 bt.push(method(), 0, CHECK); 2306 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2307 set_depth(throwable(), 1); 2308 set_backtrace(throwable(), bt.backtrace()); 2309 } 2310 return; 2311 } 2312 2313 // Instead of using vframe directly, this version of fill_in_stack_trace 2314 // basically handles everything by hand. This significantly improved the 2315 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2316 // See bug 6333838 for more details. 2317 // The "ASSERT" here is to verify this method generates the exactly same stack 2318 // trace as utilizing vframe. 2319 #ifdef ASSERT 2320 vframeStream st(thread); 2321 methodHandle st_method(THREAD, st.method()); 2322 #endif 2323 int total_count = 0; 2324 RegisterMap map(thread, false); 2325 int decode_offset = 0; 2326 CompiledMethod* nm = NULL; 2327 bool skip_fillInStackTrace_check = false; 2328 bool skip_throwableInit_check = false; 2329 bool skip_hidden = !ShowHiddenFrames; 2330 2331 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2332 Method* method = NULL; 2333 int bci = 0; 2334 2335 // Compiled java method case. 2336 if (decode_offset != 0) { 2337 DebugInfoReadStream stream(nm, decode_offset); 2338 decode_offset = stream.read_int(); 2339 method = (Method*)nm->metadata_at(stream.read_int()); 2340 bci = stream.read_bci(); 2341 } else { 2342 if (fr.is_first_frame()) break; 2343 address pc = fr.pc(); 2344 if (fr.is_interpreted_frame()) { 2345 address bcp = fr.interpreter_frame_bcp(); 2346 method = fr.interpreter_frame_method(); 2347 bci = method->bci_from(bcp); 2348 fr = fr.sender(&map); 2349 } else { 2350 CodeBlob* cb = fr.cb(); 2351 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2352 // but non nmethod 2353 fr = fr.sender(&map); 2354 if (cb == NULL || !cb->is_compiled()) { 2355 continue; 2356 } 2357 nm = cb->as_compiled_method(); 2358 if (nm->method()->is_native()) { 2359 method = nm->method(); 2360 bci = 0; 2361 } else { 2362 PcDesc* pd = nm->pc_desc_at(pc); 2363 decode_offset = pd->scope_decode_offset(); 2364 // if decode_offset is not equal to 0, it will execute the 2365 // "compiled java method case" at the beginning of the loop. 2366 continue; 2367 } 2368 } 2369 } 2370 #ifdef ASSERT 2371 assert(st_method() == method && st.bci() == bci, 2372 "Wrong stack trace"); 2373 st.next(); 2374 // vframeStream::method isn't GC-safe so store off a copy 2375 // of the Method* in case we GC. 2376 if (!st.at_end()) { 2377 st_method = st.method(); 2378 } 2379 #endif 2380 2381 // the format of the stacktrace will be: 2382 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2383 // - 0 or more <init> methods for the exception class (skipped) 2384 // - rest of the stack 2385 2386 if (!skip_fillInStackTrace_check) { 2387 if (method->name() == vmSymbols::fillInStackTrace_name() && 2388 throwable->is_a(method->method_holder())) { 2389 continue; 2390 } 2391 else { 2392 skip_fillInStackTrace_check = true; // gone past them all 2393 } 2394 } 2395 if (!skip_throwableInit_check) { 2396 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2397 2398 // skip <init> methods of the exception class and superclasses 2399 // This is simlar to classic VM. 2400 if (method->name() == vmSymbols::object_initializer_name() && 2401 throwable->is_a(method->method_holder())) { 2402 continue; 2403 } else { 2404 // there are none or we've seen them all - either way stop checking 2405 skip_throwableInit_check = true; 2406 } 2407 } 2408 if (method->is_hidden()) { 2409 if (skip_hidden) continue; 2410 } 2411 bt.push(method, bci, CHECK); 2412 total_count++; 2413 } 2414 2415 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2416 2417 // Put completed stack trace into throwable object 2418 set_backtrace(throwable(), bt.backtrace()); 2419 set_depth(throwable(), total_count); 2420 } 2421 2422 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2423 // No-op if stack trace is disabled 2424 if (!StackTraceInThrowable) { 2425 return; 2426 } 2427 2428 // Disable stack traces for some preallocated out of memory errors 2429 if (!Universe::should_fill_in_stack_trace(throwable)) { 2430 return; 2431 } 2432 2433 PRESERVE_EXCEPTION_MARK; 2434 2435 JavaThread* thread = JavaThread::active(); 2436 fill_in_stack_trace(throwable, method, thread); 2437 // ignore exceptions thrown during stack trace filling 2438 CLEAR_PENDING_EXCEPTION; 2439 } 2440 2441 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2442 // Allocate stack trace - backtrace is created but not filled in 2443 2444 // No-op if stack trace is disabled 2445 if (!StackTraceInThrowable) return; 2446 BacktraceBuilder bt(CHECK); // creates a backtrace 2447 set_backtrace(throwable(), bt.backtrace()); 2448 } 2449 2450 2451 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2452 // Fill in stack trace into preallocated backtrace (no GC) 2453 2454 // No-op if stack trace is disabled 2455 if (!StackTraceInThrowable) return; 2456 2457 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2458 2459 JavaThread* THREAD = JavaThread::current(); 2460 2461 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2462 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2463 2464 ResourceMark rm(THREAD); 2465 vframeStream st(THREAD); 2466 2467 BacktraceBuilder bt(THREAD, backtrace); 2468 2469 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2470 // methods as preallocated errors aren't created by "java" code. 2471 2472 // fill in as much stack trace as possible 2473 int chunk_count = 0; 2474 for (;!st.at_end(); st.next()) { 2475 bt.push(st.method(), st.bci(), CHECK); 2476 chunk_count++; 2477 2478 // Bail-out for deep stacks 2479 if (chunk_count >= trace_chunk_size) break; 2480 } 2481 set_depth(throwable(), chunk_count); 2482 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2483 2484 // We support the Throwable immutability protocol defined for Java 7. 2485 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2486 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2487 } 2488 2489 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2490 objArrayHandle stack_trace_array_h, TRAPS) { 2491 2492 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2493 THROW(vmSymbols::java_lang_NullPointerException()); 2494 } 2495 2496 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2497 2498 if (stack_trace_array_h->length() != depth(throwable())) { 2499 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2500 } 2501 2502 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2503 BacktraceIterator iter(result, THREAD); 2504 2505 int index = 0; 2506 while (iter.repeat()) { 2507 BacktraceElement bte = iter.next(THREAD); 2508 2509 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2510 2511 if (stack_trace_element.is_null()) { 2512 THROW(vmSymbols::java_lang_NullPointerException()); 2513 } 2514 2515 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2516 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2517 2518 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2519 method, 2520 bte._version, 2521 bte._bci, 2522 bte._name, CHECK); 2523 } 2524 } 2525 2526 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2527 // Allocate java.lang.StackTraceElement instance 2528 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2529 assert(k != NULL, "must be loaded in 1.4+"); 2530 if (k->should_be_initialized()) { 2531 k->initialize(CHECK_0); 2532 } 2533 2534 Handle element = k->allocate_instance_handle(CHECK_0); 2535 2536 int version = method->constants()->version(); 2537 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2538 return element(); 2539 } 2540 2541 void java_lang_StackTraceElement::fill_in(Handle element, 2542 InstanceKlass* holder, const methodHandle& method, 2543 int version, int bci, Symbol* name, TRAPS) { 2544 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2545 2546 ResourceMark rm(THREAD); 2547 HandleMark hm(THREAD); 2548 2549 // Fill in class name 2550 Handle java_class(THREAD, holder->java_mirror()); 2551 oop classname = java_lang_Class::name(java_class, CHECK); 2552 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2553 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2554 2555 oop loader = holder->class_loader(); 2556 if (loader != NULL) { 2557 oop loader_name = java_lang_ClassLoader::name(loader); 2558 if (loader_name != NULL) 2559 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2560 } 2561 2562 // Fill in method name 2563 oop methodname = StringTable::intern(name, CHECK); 2564 java_lang_StackTraceElement::set_methodName(element(), methodname); 2565 2566 // Fill in module name and version 2567 ModuleEntry* module = holder->module(); 2568 if (module->is_named()) { 2569 oop module_name = StringTable::intern(module->name(), CHECK); 2570 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2571 oop module_version; 2572 if (module->version() != NULL) { 2573 module_version = StringTable::intern(module->version(), CHECK); 2574 } else { 2575 module_version = NULL; 2576 } 2577 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2578 } 2579 2580 if (method() == NULL || !version_matches(method(), version)) { 2581 // The method was redefined, accurate line number information isn't available 2582 java_lang_StackTraceElement::set_fileName(element(), NULL); 2583 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2584 } else { 2585 // Fill in source file name and line number. 2586 Symbol* source = Backtrace::get_source_file_name(holder, version); 2587 oop source_file = java_lang_Class::source_file(java_class()); 2588 if (source != NULL) { 2589 // Class was not redefined. We can trust its cache if set, 2590 // else we have to initialize it. 2591 if (source_file == NULL) { 2592 source_file = StringTable::intern(source, CHECK); 2593 java_lang_Class::set_source_file(java_class(), source_file); 2594 } 2595 } else { 2596 // Class was redefined. Dump the cache if it was set. 2597 if (source_file != NULL) { 2598 source_file = NULL; 2599 java_lang_Class::set_source_file(java_class(), source_file); 2600 } 2601 } 2602 java_lang_StackTraceElement::set_fileName(element(), source_file); 2603 2604 int line_number = Backtrace::get_line_number(method, bci); 2605 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2606 } 2607 } 2608 2609 #if INCLUDE_JVMCI 2610 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) { 2611 int method_id = method->orig_method_idnum(); 2612 int cpref = method->name_index(); 2613 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number); 2614 } 2615 2616 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) { 2617 // Fill in class name 2618 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2619 Method* method = holder->method_with_orig_idnum(method_id, version); 2620 2621 // The method can be NULL if the requested class version is gone 2622 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2623 2624 // Fill in method name 2625 methodname = sym; 2626 2627 if (!version_matches(method, version)) { 2628 // If the method was redefined, accurate line number information isn't available 2629 filename = NULL; 2630 line_number = -1; 2631 } else { 2632 // Fill in source file name and line number. 2633 // Use a specific ik version as a holder since the mirror might 2634 // refer to a version that is now obsolete and no longer accessible 2635 // via the previous versions list. 2636 holder = holder->get_klass_version(version); 2637 assert(holder != NULL, "sanity check"); 2638 filename = holder->source_file_name(); 2639 line_number = Backtrace::get_line_number(method, bci); 2640 } 2641 } 2642 #endif // INCLUDE_JVMCI 2643 2644 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2645 HandleMark hm(THREAD); 2646 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2647 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2648 // we should expand MemberName::name when Throwable uses StackTrace 2649 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2650 return method; 2651 } 2652 2653 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2654 // set Method* or mid/cpref 2655 HandleMark hm(THREAD); 2656 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2657 InstanceKlass* ik = method->method_holder(); 2658 CallInfo info(method(), ik, CHECK); 2659 MethodHandles::init_method_MemberName(mname, info); 2660 // set bci 2661 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2662 // method may be redefined; store the version 2663 int version = method->constants()->version(); 2664 assert((jushort)version == version, "version should be short"); 2665 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2666 } 2667 2668 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2669 ResourceMark rm(THREAD); 2670 HandleMark hm(THREAD); 2671 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2672 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2673 InstanceKlass* holder = InstanceKlass::cast(clazz); 2674 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2675 2676 short version = stackFrame->short_field(_version_offset); 2677 int bci = stackFrame->int_field(_bci_offset); 2678 Symbol* name = method->name(); 2679 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2680 } 2681 2682 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2683 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2684 macro(_bci_offset, k, "bci", int_signature, false) 2685 2686 void java_lang_StackFrameInfo::compute_offsets() { 2687 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2688 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2689 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2690 } 2691 2692 #if INCLUDE_CDS 2693 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2694 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2695 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2696 } 2697 #endif 2698 2699 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2700 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2701 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2702 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2703 macro(_mode_offset, k, "mode", int_signature, false) 2704 2705 void java_lang_LiveStackFrameInfo::compute_offsets() { 2706 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2707 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2708 } 2709 2710 #if INCLUDE_CDS 2711 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2712 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2713 } 2714 #endif 2715 2716 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2717 macro(override_offset, k, "override", bool_signature, false) 2718 2719 void java_lang_reflect_AccessibleObject::compute_offsets() { 2720 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2721 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2722 } 2723 2724 #if INCLUDE_CDS 2725 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2726 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2727 } 2728 #endif 2729 2730 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2732 return (jboolean) reflect->bool_field(override_offset); 2733 } 2734 2735 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2737 reflect->bool_field_put(override_offset, (int) value); 2738 } 2739 2740 #define METHOD_FIELDS_DO(macro) \ 2741 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2742 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2743 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2744 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2745 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2746 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2747 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2748 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2749 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2750 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 2751 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 2752 2753 void java_lang_reflect_Method::compute_offsets() { 2754 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2755 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2756 } 2757 2758 #if INCLUDE_CDS 2759 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2760 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2761 } 2762 #endif 2763 2764 Handle java_lang_reflect_Method::create(TRAPS) { 2765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2766 Klass* klass = SystemDictionary::reflect_Method_klass(); 2767 // This class is eagerly initialized during VM initialization, since we keep a refence 2768 // to one of the methods 2769 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2770 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2771 } 2772 2773 oop java_lang_reflect_Method::clazz(oop reflect) { 2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2775 return reflect->obj_field(clazz_offset); 2776 } 2777 2778 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2780 reflect->obj_field_put(clazz_offset, value); 2781 } 2782 2783 int java_lang_reflect_Method::slot(oop reflect) { 2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2785 return reflect->int_field(slot_offset); 2786 } 2787 2788 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 reflect->int_field_put(slot_offset, value); 2791 } 2792 2793 void java_lang_reflect_Method::set_name(oop method, oop value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 method->obj_field_put(name_offset, value); 2796 } 2797 2798 oop java_lang_reflect_Method::return_type(oop method) { 2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2800 return method->obj_field(returnType_offset); 2801 } 2802 2803 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2805 method->obj_field_put(returnType_offset, value); 2806 } 2807 2808 oop java_lang_reflect_Method::parameter_types(oop method) { 2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2810 return method->obj_field(parameterTypes_offset); 2811 } 2812 2813 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2815 method->obj_field_put(parameterTypes_offset, value); 2816 } 2817 2818 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2820 method->obj_field_put(exceptionTypes_offset, value); 2821 } 2822 2823 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2825 method->int_field_put(modifiers_offset, value); 2826 } 2827 2828 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2830 method->obj_field_put(signature_offset, value); 2831 } 2832 2833 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2835 method->obj_field_put(annotations_offset, value); 2836 } 2837 2838 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2840 method->obj_field_put(parameter_annotations_offset, value); 2841 } 2842 2843 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2845 method->obj_field_put(annotation_default_offset, value); 2846 } 2847 2848 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2849 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2850 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2851 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2852 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2853 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2854 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2855 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 2856 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 2857 2858 void java_lang_reflect_Constructor::compute_offsets() { 2859 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2860 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2861 } 2862 2863 #if INCLUDE_CDS 2864 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2865 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2866 } 2867 #endif 2868 2869 Handle java_lang_reflect_Constructor::create(TRAPS) { 2870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2871 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2872 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2873 InstanceKlass* ik = InstanceKlass::cast(k); 2874 // Ensure it is initialized 2875 ik->initialize(CHECK_NH); 2876 return ik->allocate_instance_handle(THREAD); 2877 } 2878 2879 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2881 return reflect->obj_field(clazz_offset); 2882 } 2883 2884 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2886 reflect->obj_field_put(clazz_offset, value); 2887 } 2888 2889 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2891 return constructor->obj_field(parameterTypes_offset); 2892 } 2893 2894 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2896 constructor->obj_field_put(parameterTypes_offset, value); 2897 } 2898 2899 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2901 constructor->obj_field_put(exceptionTypes_offset, value); 2902 } 2903 2904 int java_lang_reflect_Constructor::slot(oop reflect) { 2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2906 return reflect->int_field(slot_offset); 2907 } 2908 2909 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2911 reflect->int_field_put(slot_offset, value); 2912 } 2913 2914 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2916 constructor->int_field_put(modifiers_offset, value); 2917 } 2918 2919 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2921 constructor->obj_field_put(signature_offset, value); 2922 } 2923 2924 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2926 constructor->obj_field_put(annotations_offset, value); 2927 } 2928 2929 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2931 method->obj_field_put(parameter_annotations_offset, value); 2932 } 2933 2934 #define FIELD_FIELDS_DO(macro) \ 2935 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2936 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2937 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 2938 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2939 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2940 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 2941 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 2942 2943 void java_lang_reflect_Field::compute_offsets() { 2944 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 2945 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2946 } 2947 2948 #if INCLUDE_CDS 2949 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 2950 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2951 } 2952 #endif 2953 2954 Handle java_lang_reflect_Field::create(TRAPS) { 2955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2956 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2957 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2958 InstanceKlass* ik = InstanceKlass::cast(k); 2959 // Ensure it is initialized 2960 ik->initialize(CHECK_NH); 2961 return ik->allocate_instance_handle(THREAD); 2962 } 2963 2964 oop java_lang_reflect_Field::clazz(oop reflect) { 2965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2966 return reflect->obj_field(clazz_offset); 2967 } 2968 2969 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2971 reflect->obj_field_put(clazz_offset, value); 2972 } 2973 2974 oop java_lang_reflect_Field::name(oop field) { 2975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2976 return field->obj_field(name_offset); 2977 } 2978 2979 void java_lang_reflect_Field::set_name(oop field, oop value) { 2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2981 field->obj_field_put(name_offset, value); 2982 } 2983 2984 oop java_lang_reflect_Field::type(oop field) { 2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2986 return field->obj_field(type_offset); 2987 } 2988 2989 void java_lang_reflect_Field::set_type(oop field, oop value) { 2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2991 field->obj_field_put(type_offset, value); 2992 } 2993 2994 int java_lang_reflect_Field::slot(oop reflect) { 2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2996 return reflect->int_field(slot_offset); 2997 } 2998 2999 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3001 reflect->int_field_put(slot_offset, value); 3002 } 3003 3004 int java_lang_reflect_Field::modifiers(oop field) { 3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3006 return field->int_field(modifiers_offset); 3007 } 3008 3009 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3011 field->int_field_put(modifiers_offset, value); 3012 } 3013 3014 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3016 field->obj_field_put(signature_offset, value); 3017 } 3018 3019 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3021 field->obj_field_put(annotations_offset, value); 3022 } 3023 3024 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3025 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3026 3027 void reflect_ConstantPool::compute_offsets() { 3028 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3029 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3030 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3031 } 3032 3033 #if INCLUDE_CDS 3034 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3035 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3036 } 3037 #endif 3038 3039 #define PARAMETER_FIELDS_DO(macro) \ 3040 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3041 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3042 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3043 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3044 3045 void java_lang_reflect_Parameter::compute_offsets() { 3046 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3047 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3048 } 3049 3050 #if INCLUDE_CDS 3051 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3052 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3053 } 3054 #endif 3055 3056 Handle java_lang_reflect_Parameter::create(TRAPS) { 3057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3058 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3059 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3060 InstanceKlass* ik = InstanceKlass::cast(k); 3061 // Ensure it is initialized 3062 ik->initialize(CHECK_NH); 3063 return ik->allocate_instance_handle(THREAD); 3064 } 3065 3066 oop java_lang_reflect_Parameter::name(oop param) { 3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3068 return param->obj_field(name_offset); 3069 } 3070 3071 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3073 param->obj_field_put(name_offset, value); 3074 } 3075 3076 int java_lang_reflect_Parameter::modifiers(oop param) { 3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3078 return param->int_field(modifiers_offset); 3079 } 3080 3081 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3083 param->int_field_put(modifiers_offset, value); 3084 } 3085 3086 int java_lang_reflect_Parameter::index(oop param) { 3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3088 return param->int_field(index_offset); 3089 } 3090 3091 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3093 param->int_field_put(index_offset, value); 3094 } 3095 3096 oop java_lang_reflect_Parameter::executable(oop param) { 3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3098 return param->obj_field(executable_offset); 3099 } 3100 3101 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3103 param->obj_field_put(executable_offset, value); 3104 } 3105 3106 3107 int java_lang_Module::loader_offset; 3108 int java_lang_Module::name_offset; 3109 int java_lang_Module::_module_entry_offset = -1; 3110 3111 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3113 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3114 vmSymbols::java_lang_module_init_signature(), 3115 loader, module_name, CHECK_NH); 3116 } 3117 3118 #define MODULE_FIELDS_DO(macro) \ 3119 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3120 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3121 3122 void java_lang_Module::compute_offsets() { 3123 InstanceKlass* k = SystemDictionary::Module_klass(); 3124 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3125 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3126 } 3127 3128 #if INCLUDE_CDS 3129 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3130 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3131 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3132 } 3133 #endif 3134 3135 oop java_lang_Module::loader(oop module) { 3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3137 return module->obj_field(loader_offset); 3138 } 3139 3140 void java_lang_Module::set_loader(oop module, oop value) { 3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3142 module->obj_field_put(loader_offset, value); 3143 } 3144 3145 oop java_lang_Module::name(oop module) { 3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3147 return module->obj_field(name_offset); 3148 } 3149 3150 void java_lang_Module::set_name(oop module, oop value) { 3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3152 module->obj_field_put(name_offset, value); 3153 } 3154 3155 ModuleEntry* java_lang_Module::module_entry(oop module) { 3156 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3157 assert(module != NULL, "module can't be null"); 3158 assert(oopDesc::is_oop(module), "module must be oop"); 3159 3160 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3161 if (module_entry == NULL) { 3162 // If the inject field containing the ModuleEntry* is null then return the 3163 // class loader's unnamed module. 3164 oop loader = java_lang_Module::loader(module); 3165 Handle h_loader = Handle(Thread::current(), loader); 3166 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3167 return loader_cld->unnamed_module(); 3168 } 3169 return module_entry; 3170 } 3171 3172 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3173 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3174 assert(module != NULL, "module can't be null"); 3175 assert(oopDesc::is_oop(module), "module must be oop"); 3176 module->address_field_put(_module_entry_offset, (address)module_entry); 3177 } 3178 3179 Handle reflect_ConstantPool::create(TRAPS) { 3180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3181 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3182 // Ensure it is initialized 3183 k->initialize(CHECK_NH); 3184 return k->allocate_instance_handle(THREAD); 3185 } 3186 3187 3188 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3190 oop mirror = value->pool_holder()->java_mirror(); 3191 // Save the mirror to get back the constant pool. 3192 reflect->obj_field_put(_oop_offset, mirror); 3193 } 3194 3195 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3197 3198 oop mirror = reflect->obj_field(_oop_offset); 3199 Klass* k = java_lang_Class::as_Klass(mirror); 3200 assert(k->is_instance_klass(), "Must be"); 3201 3202 // Get the constant pool back from the klass. Since class redefinition 3203 // merges the new constant pool into the old, this is essentially the 3204 // same constant pool as the original. If constant pool merging is 3205 // no longer done in the future, this will have to change to save 3206 // the original. 3207 return InstanceKlass::cast(k)->constants(); 3208 } 3209 3210 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3211 macro(_base_offset, k, "base", object_signature, false) 3212 3213 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3214 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3215 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3216 } 3217 3218 #if INCLUDE_CDS 3219 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3220 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3221 } 3222 #endif 3223 3224 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3225 Klass* k = SystemDictionary::box_klass(type); 3226 if (k == NULL) return NULL; 3227 InstanceKlass* ik = InstanceKlass::cast(k); 3228 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3229 return ik->allocate_instance(THREAD); 3230 } 3231 3232 3233 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3234 oop box = initialize_and_allocate(type, CHECK_0); 3235 if (box == NULL) return NULL; 3236 switch (type) { 3237 case T_BOOLEAN: 3238 box->bool_field_put(value_offset, value->z); 3239 break; 3240 case T_CHAR: 3241 box->char_field_put(value_offset, value->c); 3242 break; 3243 case T_FLOAT: 3244 box->float_field_put(value_offset, value->f); 3245 break; 3246 case T_DOUBLE: 3247 box->double_field_put(long_value_offset, value->d); 3248 break; 3249 case T_BYTE: 3250 box->byte_field_put(value_offset, value->b); 3251 break; 3252 case T_SHORT: 3253 box->short_field_put(value_offset, value->s); 3254 break; 3255 case T_INT: 3256 box->int_field_put(value_offset, value->i); 3257 break; 3258 case T_LONG: 3259 box->long_field_put(long_value_offset, value->j); 3260 break; 3261 default: 3262 return NULL; 3263 } 3264 return box; 3265 } 3266 3267 3268 BasicType java_lang_boxing_object::basic_type(oop box) { 3269 if (box == NULL) return T_ILLEGAL; 3270 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3271 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3272 return T_ILLEGAL; 3273 return type; 3274 } 3275 3276 3277 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3278 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3279 switch (type) { 3280 case T_BOOLEAN: 3281 value->z = box->bool_field(value_offset); 3282 break; 3283 case T_CHAR: 3284 value->c = box->char_field(value_offset); 3285 break; 3286 case T_FLOAT: 3287 value->f = box->float_field(value_offset); 3288 break; 3289 case T_DOUBLE: 3290 value->d = box->double_field(long_value_offset); 3291 break; 3292 case T_BYTE: 3293 value->b = box->byte_field(value_offset); 3294 break; 3295 case T_SHORT: 3296 value->s = box->short_field(value_offset); 3297 break; 3298 case T_INT: 3299 value->i = box->int_field(value_offset); 3300 break; 3301 case T_LONG: 3302 value->j = box->long_field(long_value_offset); 3303 break; 3304 default: 3305 return T_ILLEGAL; 3306 } // end switch 3307 return type; 3308 } 3309 3310 3311 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3312 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3313 switch (type) { 3314 case T_BOOLEAN: 3315 box->bool_field_put(value_offset, value->z); 3316 break; 3317 case T_CHAR: 3318 box->char_field_put(value_offset, value->c); 3319 break; 3320 case T_FLOAT: 3321 box->float_field_put(value_offset, value->f); 3322 break; 3323 case T_DOUBLE: 3324 box->double_field_put(long_value_offset, value->d); 3325 break; 3326 case T_BYTE: 3327 box->byte_field_put(value_offset, value->b); 3328 break; 3329 case T_SHORT: 3330 box->short_field_put(value_offset, value->s); 3331 break; 3332 case T_INT: 3333 box->int_field_put(value_offset, value->i); 3334 break; 3335 case T_LONG: 3336 box->long_field_put(long_value_offset, value->j); 3337 break; 3338 default: 3339 return T_ILLEGAL; 3340 } // end switch 3341 return type; 3342 } 3343 3344 3345 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3346 switch (type) { 3347 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3348 case T_CHAR: st->print("%d", value->c); break; 3349 case T_BYTE: st->print("%d", value->b); break; 3350 case T_SHORT: st->print("%d", value->s); break; 3351 case T_INT: st->print("%d", value->i); break; 3352 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3353 case T_FLOAT: st->print("%f", value->f); break; 3354 case T_DOUBLE: st->print("%lf", value->d); break; 3355 default: st->print("type %d?", type); break; 3356 } 3357 } 3358 3359 // Support for java_lang_ref_Reference 3360 3361 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3362 assert(obj != NULL, "sanity"); 3363 if (offset != java_lang_ref_Reference::referent_offset) { 3364 return false; 3365 } 3366 3367 Klass* k = obj->klass(); 3368 if (!k->is_instance_klass()) { 3369 return false; 3370 } 3371 3372 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3373 bool is_reference = ik->reference_type() != REF_NONE; 3374 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3375 return is_reference; 3376 } 3377 3378 // Support for java_lang_ref_SoftReference 3379 // 3380 3381 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3382 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3383 macro(static_clock_offset, k, "clock", long_signature, true) 3384 3385 void java_lang_ref_SoftReference::compute_offsets() { 3386 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3387 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3388 } 3389 3390 #if INCLUDE_CDS 3391 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3392 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3393 } 3394 #endif 3395 3396 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3397 return ref->long_field(timestamp_offset); 3398 } 3399 3400 jlong java_lang_ref_SoftReference::clock() { 3401 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3402 oop base = ik->static_field_base_raw(); 3403 return base->long_field(static_clock_offset); 3404 } 3405 3406 void java_lang_ref_SoftReference::set_clock(jlong value) { 3407 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3408 oop base = ik->static_field_base_raw(); 3409 base->long_field_put(static_clock_offset, value); 3410 } 3411 3412 // Support for java_lang_invoke_DirectMethodHandle 3413 3414 int java_lang_invoke_DirectMethodHandle::_member_offset; 3415 3416 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3417 oop member_name = NULL; 3418 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3419 "a DirectMethodHandle oop is expected"); 3420 return dmh->obj_field(member_offset_in_bytes()); 3421 } 3422 3423 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3424 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3425 3426 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3427 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3428 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3429 } 3430 3431 #if INCLUDE_CDS 3432 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3433 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3434 } 3435 #endif 3436 3437 // Support for java_lang_invoke_MethodHandle 3438 3439 int java_lang_invoke_MethodHandle::_type_offset; 3440 int java_lang_invoke_MethodHandle::_form_offset; 3441 3442 int java_lang_invoke_MemberName::_clazz_offset; 3443 int java_lang_invoke_MemberName::_name_offset; 3444 int java_lang_invoke_MemberName::_type_offset; 3445 int java_lang_invoke_MemberName::_flags_offset; 3446 int java_lang_invoke_MemberName::_method_offset; 3447 int java_lang_invoke_MemberName::_vmindex_offset; 3448 3449 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3450 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3451 3452 int java_lang_invoke_LambdaForm::_vmentry_offset; 3453 3454 #define METHODHANDLE_FIELDS_DO(macro) \ 3455 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3456 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3457 3458 void java_lang_invoke_MethodHandle::compute_offsets() { 3459 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3460 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3461 } 3462 3463 #if INCLUDE_CDS 3464 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3465 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3466 } 3467 #endif 3468 3469 #define MEMBERNAME_FIELDS_DO(macro) \ 3470 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3471 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3472 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3473 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3474 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3475 3476 void java_lang_invoke_MemberName::compute_offsets() { 3477 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3478 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3479 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3480 } 3481 3482 #if INCLUDE_CDS 3483 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3484 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3485 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3486 } 3487 #endif 3488 3489 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3490 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3491 assert(k != NULL, "jdk mismatch"); 3492 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3493 } 3494 3495 #if INCLUDE_CDS 3496 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3497 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3498 } 3499 #endif 3500 3501 #define LAMBDAFORM_FIELDS_DO(macro) \ 3502 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3503 3504 void java_lang_invoke_LambdaForm::compute_offsets() { 3505 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3506 assert (k != NULL, "jdk mismatch"); 3507 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3508 } 3509 3510 #if INCLUDE_CDS 3511 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3512 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3513 } 3514 #endif 3515 3516 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3517 return obj != NULL && is_subclass(obj->klass()); 3518 } 3519 3520 3521 oop java_lang_invoke_MethodHandle::type(oop mh) { 3522 return mh->obj_field(_type_offset); 3523 } 3524 3525 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3526 mh->obj_field_put(_type_offset, mtype); 3527 } 3528 3529 oop java_lang_invoke_MethodHandle::form(oop mh) { 3530 assert(_form_offset != 0, ""); 3531 return mh->obj_field(_form_offset); 3532 } 3533 3534 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3535 assert(_form_offset != 0, ""); 3536 mh->obj_field_put(_form_offset, lform); 3537 } 3538 3539 /// MemberName accessors 3540 3541 oop java_lang_invoke_MemberName::clazz(oop mname) { 3542 assert(is_instance(mname), "wrong type"); 3543 return mname->obj_field(_clazz_offset); 3544 } 3545 3546 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3547 assert(is_instance(mname), "wrong type"); 3548 mname->obj_field_put(_clazz_offset, clazz); 3549 } 3550 3551 oop java_lang_invoke_MemberName::name(oop mname) { 3552 assert(is_instance(mname), "wrong type"); 3553 return mname->obj_field(_name_offset); 3554 } 3555 3556 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3557 assert(is_instance(mname), "wrong type"); 3558 mname->obj_field_put(_name_offset, name); 3559 } 3560 3561 oop java_lang_invoke_MemberName::type(oop mname) { 3562 assert(is_instance(mname), "wrong type"); 3563 return mname->obj_field(_type_offset); 3564 } 3565 3566 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3567 assert(is_instance(mname), "wrong type"); 3568 mname->obj_field_put(_type_offset, type); 3569 } 3570 3571 int java_lang_invoke_MemberName::flags(oop mname) { 3572 assert(is_instance(mname), "wrong type"); 3573 return mname->int_field(_flags_offset); 3574 } 3575 3576 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3577 assert(is_instance(mname), "wrong type"); 3578 mname->int_field_put(_flags_offset, flags); 3579 } 3580 3581 3582 // Return vmtarget from ResolvedMethodName method field through indirection 3583 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3584 assert(is_instance(mname), "wrong type"); 3585 oop method = mname->obj_field(_method_offset); 3586 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3587 } 3588 3589 bool java_lang_invoke_MemberName::is_method(oop mname) { 3590 assert(is_instance(mname), "must be MemberName"); 3591 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3592 } 3593 3594 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3595 assert(is_instance(mname), "wrong type"); 3596 mname->obj_field_put(_method_offset, resolved_method); 3597 } 3598 3599 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3600 assert(is_instance(mname), "wrong type"); 3601 return (intptr_t) mname->address_field(_vmindex_offset); 3602 } 3603 3604 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3605 assert(is_instance(mname), "wrong type"); 3606 mname->address_field_put(_vmindex_offset, (address) index); 3607 } 3608 3609 3610 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3611 assert(is_instance(resolved_method), "wrong type"); 3612 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3613 assert(m->is_method(), "must be"); 3614 return m; 3615 } 3616 3617 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3618 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3619 assert(is_instance(resolved_method), "wrong type"); 3620 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3621 } 3622 3623 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 3624 assert(is_instance(resolved_method), "wrong type"); 3625 resolved_method->obj_field_put(_vmholder_offset, holder); 3626 } 3627 3628 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3629 const Method* method = m(); 3630 3631 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3632 oop resolved_method = ResolvedMethodTable::find_method(method); 3633 if (resolved_method != NULL) { 3634 return resolved_method; 3635 } 3636 3637 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3638 if (!k->is_initialized()) { 3639 k->initialize(CHECK_NULL); 3640 } 3641 3642 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3643 3644 NoSafepointVerifier nsv; 3645 3646 if (method->is_old()) { 3647 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 3648 method->get_new_method(); 3649 } 3650 3651 InstanceKlass* holder = method->method_holder(); 3652 3653 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 3654 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3655 // distinct loaders) to ensure the metadata is kept alive. 3656 // This mirror may be different than the one in clazz field. 3657 set_vmholder(new_resolved_method, holder->java_mirror()); 3658 3659 // Set flag in class to indicate this InstanceKlass has entries in the table 3660 // to avoid walking table during redefinition if none of the redefined classes 3661 // have any membernames in the table. 3662 holder->set_has_resolved_methods(); 3663 3664 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 3665 } 3666 3667 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3668 assert(is_instance(lform), "wrong type"); 3669 return lform->obj_field(_vmentry_offset); 3670 } 3671 3672 3673 // Support for java_lang_invoke_MethodType 3674 3675 int java_lang_invoke_MethodType::_rtype_offset; 3676 int java_lang_invoke_MethodType::_ptypes_offset; 3677 3678 #define METHODTYPE_FIELDS_DO(macro) \ 3679 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3680 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3681 3682 void java_lang_invoke_MethodType::compute_offsets() { 3683 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3684 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3685 } 3686 3687 #if INCLUDE_CDS 3688 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3689 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3690 } 3691 #endif 3692 3693 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3694 st->print("("); 3695 objArrayOop pts = ptypes(mt); 3696 for (int i = 0, limit = pts->length(); i < limit; i++) { 3697 java_lang_Class::print_signature(pts->obj_at(i), st); 3698 } 3699 st->print(")"); 3700 java_lang_Class::print_signature(rtype(mt), st); 3701 } 3702 3703 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 3704 ResourceMark rm; 3705 stringStream buffer(128); 3706 print_signature(mt, &buffer); 3707 const char* sigstr = buffer.base(); 3708 int siglen = (int) buffer.size(); 3709 Symbol *name; 3710 if (!intern_if_not_found) { 3711 name = SymbolTable::probe(sigstr, siglen); 3712 } else { 3713 name = SymbolTable::new_symbol(sigstr, siglen); 3714 } 3715 return name; 3716 } 3717 3718 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3719 if (mt1 == mt2) 3720 return true; 3721 if (rtype(mt1) != rtype(mt2)) 3722 return false; 3723 if (ptype_count(mt1) != ptype_count(mt2)) 3724 return false; 3725 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3726 if (ptype(mt1, i) != ptype(mt2, i)) 3727 return false; 3728 } 3729 return true; 3730 } 3731 3732 oop java_lang_invoke_MethodType::rtype(oop mt) { 3733 assert(is_instance(mt), "must be a MethodType"); 3734 return mt->obj_field(_rtype_offset); 3735 } 3736 3737 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3738 assert(is_instance(mt), "must be a MethodType"); 3739 return (objArrayOop) mt->obj_field(_ptypes_offset); 3740 } 3741 3742 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3743 return ptypes(mt)->obj_at(idx); 3744 } 3745 3746 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3747 return ptypes(mt)->length(); 3748 } 3749 3750 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3751 objArrayOop pts = ptypes(mt); 3752 int count = pts->length(); 3753 int slots = 0; 3754 for (int i = 0; i < count; i++) { 3755 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3756 slots += type2size[bt]; 3757 } 3758 return slots; 3759 } 3760 3761 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3762 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3763 return type2size[bt]; 3764 } 3765 3766 3767 // Support for java_lang_invoke_CallSite 3768 3769 int java_lang_invoke_CallSite::_target_offset; 3770 int java_lang_invoke_CallSite::_context_offset; 3771 3772 #define CALLSITE_FIELDS_DO(macro) \ 3773 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3774 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3775 3776 void java_lang_invoke_CallSite::compute_offsets() { 3777 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3778 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3779 } 3780 3781 #if INCLUDE_CDS 3782 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3783 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3784 } 3785 #endif 3786 3787 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 3788 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3789 3790 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 3791 return dep_oop; 3792 } 3793 3794 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3795 3796 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3797 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 3798 3799 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3800 InstanceKlass* k = SystemDictionary::Context_klass(); 3801 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3802 } 3803 3804 #if INCLUDE_CDS 3805 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3806 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3807 } 3808 #endif 3809 3810 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3811 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3812 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset); 3813 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset); 3814 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 3815 return dep_ctx; 3816 } 3817 3818 // Support for java_security_AccessControlContext 3819 3820 int java_security_AccessControlContext::_context_offset = 0; 3821 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3822 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3823 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3824 3825 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3826 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3827 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3828 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3829 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3830 3831 void java_security_AccessControlContext::compute_offsets() { 3832 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3833 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3834 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3835 } 3836 3837 #if INCLUDE_CDS 3838 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3839 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3840 } 3841 #endif 3842 3843 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3844 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3845 // Ensure klass is initialized 3846 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3847 // Allocate result 3848 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3849 // Fill in values 3850 result->obj_field_put(_context_offset, context()); 3851 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3852 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3853 // whitelist AccessControlContexts created by the JVM if present 3854 if (_isAuthorized_offset != -1) { 3855 result->bool_field_put(_isAuthorized_offset, true); 3856 } 3857 return result; 3858 } 3859 3860 3861 // Support for java_lang_ClassLoader 3862 3863 bool java_lang_ClassLoader::offsets_computed = false; 3864 int java_lang_ClassLoader::_loader_data_offset = -1; 3865 int java_lang_ClassLoader::parallelCapable_offset = -1; 3866 int java_lang_ClassLoader::name_offset = -1; 3867 int java_lang_ClassLoader::nameAndId_offset = -1; 3868 int java_lang_ClassLoader::unnamedModule_offset = -1; 3869 3870 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 3871 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3872 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 3873 } 3874 3875 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 3876 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3877 return RawAccess<>::load_at(loader, _loader_data_offset); 3878 } 3879 3880 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 3881 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3882 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 3883 } 3884 3885 #define CLASSLOADER_FIELDS_DO(macro) \ 3886 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3887 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 3888 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 3889 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 3890 macro(parent_offset, k1, "parent", classloader_signature, false) 3891 3892 void java_lang_ClassLoader::compute_offsets() { 3893 assert(!offsets_computed, "offsets should be initialized only once"); 3894 offsets_computed = true; 3895 3896 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 3897 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3898 3899 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3900 } 3901 3902 #if INCLUDE_CDS 3903 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 3904 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3905 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3906 } 3907 #endif 3908 3909 oop java_lang_ClassLoader::parent(oop loader) { 3910 assert(is_instance(loader), "loader must be oop"); 3911 return loader->obj_field(parent_offset); 3912 } 3913 3914 // Returns the name field of this class loader. If the name field has not 3915 // been set, null will be returned. 3916 oop java_lang_ClassLoader::name(oop loader) { 3917 assert(is_instance(loader), "loader must be oop"); 3918 return loader->obj_field(name_offset); 3919 } 3920 3921 // Returns the nameAndId field of this class loader. The format is 3922 // as follows: 3923 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 3924 // If the defining loader has no name then <qualified-class-name> @<id> 3925 // If built-in loader, then omit '@<id>' as there is only one instance. 3926 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 3927 oop java_lang_ClassLoader::nameAndId(oop loader) { 3928 assert(is_instance(loader), "loader must be oop"); 3929 return loader->obj_field(nameAndId_offset); 3930 } 3931 3932 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3933 assert(is_instance(loader), "loader must be oop"); 3934 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3935 oop acl = loader; 3936 debug_only(jint loop_count = 0); 3937 // This loop taken verbatim from ClassLoader.java: 3938 do { 3939 acl = parent(acl); 3940 if (cl == acl) { 3941 return true; 3942 } 3943 assert(++loop_count > 0, "loop_count overflow"); 3944 } while (acl != NULL); 3945 return false; 3946 } 3947 3948 bool java_lang_ClassLoader::is_instance(oop obj) { 3949 return obj != NULL && is_subclass(obj->klass()); 3950 } 3951 3952 3953 // For class loader classes, parallelCapable defined 3954 // based on non-null field 3955 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3956 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3957 if (parallelCapable_offset == -1) { 3958 // Default for backward compatibility is false 3959 return false; 3960 } 3961 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3962 } 3963 3964 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3965 // Fix for 4474172; see evaluation for more details 3966 loader = non_reflection_class_loader(loader); 3967 3968 oop cl = SystemDictionary::java_system_loader(); 3969 while(cl != NULL) { 3970 if (cl == loader) return true; 3971 cl = parent(cl); 3972 } 3973 return false; 3974 } 3975 3976 // Return true if this is one of the class loaders associated with 3977 // the generated bytecodes for reflection. 3978 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3979 if (loader != NULL) { 3980 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3981 // This might be null in non-1.4 JDKs 3982 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3983 } 3984 return false; 3985 } 3986 3987 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3988 // See whether this is one of the class loaders associated with 3989 // the generated bytecodes for reflection, and if so, "magically" 3990 // delegate to its parent to prevent class loading from occurring 3991 // in places where applications using reflection didn't expect it. 3992 if (is_reflection_class_loader(loader)) { 3993 return parent(loader); 3994 } 3995 return loader; 3996 } 3997 3998 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3999 assert(is_instance(loader), "loader must be oop"); 4000 return loader->obj_field(unnamedModule_offset); 4001 } 4002 4003 // Support for java_lang_System 4004 // 4005 #define SYSTEM_FIELDS_DO(macro) \ 4006 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4007 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4008 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4009 macro(static_security_offset, k, "security", security_manager_signature, true) 4010 4011 void java_lang_System::compute_offsets() { 4012 InstanceKlass* k = SystemDictionary::System_klass(); 4013 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4014 } 4015 4016 #if INCLUDE_CDS 4017 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4018 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4019 } 4020 #endif 4021 4022 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4023 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4024 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4025 4026 // Support for jdk_internal_misc_UnsafeConstants 4027 // 4028 class UnsafeConstantsFixup : public FieldClosure { 4029 private: 4030 int _address_size; 4031 int _page_size; 4032 bool _big_endian; 4033 bool _use_unaligned_access; 4034 int _data_cache_line_flush_size; 4035 public: 4036 UnsafeConstantsFixup() { 4037 // round up values for all static final fields 4038 _address_size = sizeof(void*); 4039 _page_size = os::vm_page_size(); 4040 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4041 _use_unaligned_access = UseUnalignedAccesses; 4042 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4043 } 4044 4045 void do_field(fieldDescriptor* fd) { 4046 oop mirror = fd->field_holder()->java_mirror(); 4047 assert(mirror != NULL, "UnsafeConstants must have mirror already"); 4048 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4049 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4050 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4051 if (fd->name() == vmSymbols::address_size_name()) { 4052 mirror->int_field_put(fd->offset(), _address_size); 4053 } else if (fd->name() == vmSymbols::page_size_name()) { 4054 mirror->int_field_put(fd->offset(), _page_size); 4055 } else if (fd->name() == vmSymbols::big_endian_name()) { 4056 mirror->bool_field_put(fd->offset(), _big_endian); 4057 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4058 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4059 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4060 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4061 } else { 4062 assert(false, "unexpected UnsafeConstants field"); 4063 } 4064 } 4065 }; 4066 4067 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4068 UnsafeConstantsFixup fixup; 4069 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4070 } 4071 4072 int java_lang_Class::_klass_offset; 4073 int java_lang_Class::_array_klass_offset; 4074 int java_lang_Class::_oop_size_offset; 4075 int java_lang_Class::_static_oop_field_count_offset; 4076 int java_lang_Class::_class_loader_offset; 4077 int java_lang_Class::_module_offset; 4078 int java_lang_Class::_protection_domain_offset; 4079 int java_lang_Class::_component_mirror_offset; 4080 int java_lang_Class::_init_lock_offset; 4081 int java_lang_Class::_signers_offset; 4082 int java_lang_Class::_name_offset; 4083 int java_lang_Class::_source_file_offset; 4084 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4085 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4086 int java_lang_Throwable::backtrace_offset; 4087 int java_lang_Throwable::detailMessage_offset; 4088 int java_lang_Throwable::stackTrace_offset; 4089 int java_lang_Throwable::depth_offset; 4090 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4091 int java_lang_reflect_AccessibleObject::override_offset; 4092 int java_lang_reflect_Method::clazz_offset; 4093 int java_lang_reflect_Method::name_offset; 4094 int java_lang_reflect_Method::returnType_offset; 4095 int java_lang_reflect_Method::parameterTypes_offset; 4096 int java_lang_reflect_Method::exceptionTypes_offset; 4097 int java_lang_reflect_Method::slot_offset; 4098 int java_lang_reflect_Method::modifiers_offset; 4099 int java_lang_reflect_Method::signature_offset; 4100 int java_lang_reflect_Method::annotations_offset; 4101 int java_lang_reflect_Method::parameter_annotations_offset; 4102 int java_lang_reflect_Method::annotation_default_offset; 4103 int java_lang_reflect_Constructor::clazz_offset; 4104 int java_lang_reflect_Constructor::parameterTypes_offset; 4105 int java_lang_reflect_Constructor::exceptionTypes_offset; 4106 int java_lang_reflect_Constructor::slot_offset; 4107 int java_lang_reflect_Constructor::modifiers_offset; 4108 int java_lang_reflect_Constructor::signature_offset; 4109 int java_lang_reflect_Constructor::annotations_offset; 4110 int java_lang_reflect_Constructor::parameter_annotations_offset; 4111 int java_lang_reflect_Field::clazz_offset; 4112 int java_lang_reflect_Field::name_offset; 4113 int java_lang_reflect_Field::type_offset; 4114 int java_lang_reflect_Field::slot_offset; 4115 int java_lang_reflect_Field::modifiers_offset; 4116 int java_lang_reflect_Field::signature_offset; 4117 int java_lang_reflect_Field::annotations_offset; 4118 int java_lang_reflect_Parameter::name_offset; 4119 int java_lang_reflect_Parameter::modifiers_offset; 4120 int java_lang_reflect_Parameter::index_offset; 4121 int java_lang_reflect_Parameter::executable_offset; 4122 int java_lang_boxing_object::value_offset; 4123 int java_lang_boxing_object::long_value_offset; 4124 int java_lang_ref_Reference::referent_offset; 4125 int java_lang_ref_Reference::queue_offset; 4126 int java_lang_ref_Reference::next_offset; 4127 int java_lang_ref_Reference::discovered_offset; 4128 int java_lang_ref_SoftReference::timestamp_offset; 4129 int java_lang_ref_SoftReference::static_clock_offset; 4130 int java_lang_ClassLoader::parent_offset; 4131 int java_lang_System::static_in_offset; 4132 int java_lang_System::static_out_offset; 4133 int java_lang_System::static_err_offset; 4134 int java_lang_System::static_security_offset; 4135 int java_lang_StackTraceElement::methodName_offset; 4136 int java_lang_StackTraceElement::fileName_offset; 4137 int java_lang_StackTraceElement::lineNumber_offset; 4138 int java_lang_StackTraceElement::moduleName_offset; 4139 int java_lang_StackTraceElement::moduleVersion_offset; 4140 int java_lang_StackTraceElement::classLoaderName_offset; 4141 int java_lang_StackTraceElement::declaringClass_offset; 4142 int java_lang_StackTraceElement::declaringClassObject_offset; 4143 int java_lang_StackFrameInfo::_memberName_offset; 4144 int java_lang_StackFrameInfo::_bci_offset; 4145 int java_lang_StackFrameInfo::_version_offset; 4146 int java_lang_LiveStackFrameInfo::_monitors_offset; 4147 int java_lang_LiveStackFrameInfo::_locals_offset; 4148 int java_lang_LiveStackFrameInfo::_operands_offset; 4149 int java_lang_LiveStackFrameInfo::_mode_offset; 4150 int java_lang_AssertionStatusDirectives::classes_offset; 4151 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4152 int java_lang_AssertionStatusDirectives::packages_offset; 4153 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4154 int java_lang_AssertionStatusDirectives::deflt_offset; 4155 int java_nio_Buffer::_limit_offset; 4156 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4157 int reflect_ConstantPool::_oop_offset; 4158 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4159 int java_lang_Integer_IntegerCache::_static_cache_offset; 4160 int java_lang_Long_LongCache::_static_cache_offset; 4161 int java_lang_Character_CharacterCache::_static_cache_offset; 4162 int java_lang_Short_ShortCache::_static_cache_offset; 4163 int java_lang_Byte_ByteCache::_static_cache_offset; 4164 int java_lang_Boolean::_static_TRUE_offset; 4165 int java_lang_Boolean::_static_FALSE_offset; 4166 4167 4168 4169 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4170 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4171 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4172 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4173 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4174 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4175 macro(methodName_offset, k, "methodName", string_signature, false); \ 4176 macro(fileName_offset, k, "fileName", string_signature, false); \ 4177 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4178 4179 // Support for java_lang_StackTraceElement 4180 void java_lang_StackTraceElement::compute_offsets() { 4181 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4182 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4183 } 4184 4185 #if INCLUDE_CDS 4186 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4187 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4188 } 4189 #endif 4190 4191 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4192 element->obj_field_put(fileName_offset, value); 4193 } 4194 4195 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4196 element->obj_field_put(declaringClass_offset, value); 4197 } 4198 4199 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4200 element->obj_field_put(methodName_offset, value); 4201 } 4202 4203 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4204 element->int_field_put(lineNumber_offset, value); 4205 } 4206 4207 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4208 element->obj_field_put(moduleName_offset, value); 4209 } 4210 4211 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4212 element->obj_field_put(moduleVersion_offset, value); 4213 } 4214 4215 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4216 element->obj_field_put(classLoaderName_offset, value); 4217 } 4218 4219 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4220 element->obj_field_put(declaringClassObject_offset, value); 4221 } 4222 4223 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4224 element->short_field_put(_version_offset, value); 4225 } 4226 4227 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4228 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 4229 element->int_field_put(_bci_offset, value); 4230 } 4231 4232 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4233 element->obj_field_put(_monitors_offset, value); 4234 } 4235 4236 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4237 element->obj_field_put(_locals_offset, value); 4238 } 4239 4240 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4241 element->obj_field_put(_operands_offset, value); 4242 } 4243 4244 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4245 element->int_field_put(_mode_offset, value); 4246 } 4247 4248 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4249 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4250 macro(classes_offset, k, "classes", string_array_signature, false); \ 4251 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4252 macro(packages_offset, k, "packages", string_array_signature, false); \ 4253 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4254 macro(deflt_offset, k, "deflt", bool_signature, false) 4255 4256 void java_lang_AssertionStatusDirectives::compute_offsets() { 4257 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4258 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4259 } 4260 4261 #if INCLUDE_CDS 4262 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4263 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4264 } 4265 #endif 4266 4267 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4268 o->obj_field_put(classes_offset, val); 4269 } 4270 4271 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4272 o->obj_field_put(classEnabled_offset, val); 4273 } 4274 4275 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4276 o->obj_field_put(packages_offset, val); 4277 } 4278 4279 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4280 o->obj_field_put(packageEnabled_offset, val); 4281 } 4282 4283 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4284 o->bool_field_put(deflt_offset, val); 4285 } 4286 4287 4288 // Support for intrinsification of java.nio.Buffer.checkIndex 4289 int java_nio_Buffer::limit_offset() { 4290 return _limit_offset; 4291 } 4292 4293 #define BUFFER_FIELDS_DO(macro) \ 4294 macro(_limit_offset, k, "limit", int_signature, false) 4295 4296 void java_nio_Buffer::compute_offsets() { 4297 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4298 assert(k != NULL, "must be loaded in 1.4+"); 4299 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4300 } 4301 4302 #if INCLUDE_CDS 4303 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4304 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4305 } 4306 #endif 4307 4308 #define AOS_FIELDS_DO(macro) \ 4309 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4310 4311 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4312 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4313 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4314 } 4315 4316 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4317 assert(_owner_offset != 0, "Must be initialized"); 4318 return obj->obj_field(_owner_offset); 4319 } 4320 4321 #if INCLUDE_CDS 4322 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4323 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4324 } 4325 #endif 4326 4327 #define INTEGER_CACHE_FIELDS_DO(macro) \ 4328 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 4329 4330 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 4331 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4332 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4333 } 4334 4335 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 4336 oop base = ik->static_field_base_raw(); 4337 return objArrayOop(base->obj_field(_static_cache_offset)); 4338 } 4339 4340 Symbol* java_lang_Integer_IntegerCache::symbol() { 4341 return vmSymbols::java_lang_Integer_IntegerCache(); 4342 } 4343 4344 #if INCLUDE_CDS 4345 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 4346 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4347 } 4348 #endif 4349 #undef INTEGER_CACHE_FIELDS_DO 4350 4351 jint java_lang_Integer::value(oop obj) { 4352 jvalue v; 4353 java_lang_boxing_object::get_value(obj, &v); 4354 return v.i; 4355 } 4356 4357 #define LONG_CACHE_FIELDS_DO(macro) \ 4358 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 4359 4360 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 4361 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4362 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4363 } 4364 4365 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 4366 oop base = ik->static_field_base_raw(); 4367 return objArrayOop(base->obj_field(_static_cache_offset)); 4368 } 4369 4370 Symbol* java_lang_Long_LongCache::symbol() { 4371 return vmSymbols::java_lang_Long_LongCache(); 4372 } 4373 4374 #if INCLUDE_CDS 4375 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 4376 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4377 } 4378 #endif 4379 #undef LONG_CACHE_FIELDS_DO 4380 4381 jlong java_lang_Long::value(oop obj) { 4382 jvalue v; 4383 java_lang_boxing_object::get_value(obj, &v); 4384 return v.j; 4385 } 4386 4387 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 4388 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 4389 4390 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 4391 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4392 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4393 } 4394 4395 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 4396 oop base = ik->static_field_base_raw(); 4397 return objArrayOop(base->obj_field(_static_cache_offset)); 4398 } 4399 4400 Symbol* java_lang_Character_CharacterCache::symbol() { 4401 return vmSymbols::java_lang_Character_CharacterCache(); 4402 } 4403 4404 #if INCLUDE_CDS 4405 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 4406 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4407 } 4408 #endif 4409 #undef CHARACTER_CACHE_FIELDS_DO 4410 4411 jchar java_lang_Character::value(oop obj) { 4412 jvalue v; 4413 java_lang_boxing_object::get_value(obj, &v); 4414 return v.c; 4415 } 4416 4417 #define SHORT_CACHE_FIELDS_DO(macro) \ 4418 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 4419 4420 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 4421 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4422 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4423 } 4424 4425 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 4426 oop base = ik->static_field_base_raw(); 4427 return objArrayOop(base->obj_field(_static_cache_offset)); 4428 } 4429 4430 Symbol* java_lang_Short_ShortCache::symbol() { 4431 return vmSymbols::java_lang_Short_ShortCache(); 4432 } 4433 4434 #if INCLUDE_CDS 4435 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 4436 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4437 } 4438 #endif 4439 #undef SHORT_CACHE_FIELDS_DO 4440 4441 jshort java_lang_Short::value(oop obj) { 4442 jvalue v; 4443 java_lang_boxing_object::get_value(obj, &v); 4444 return v.s; 4445 } 4446 4447 #define BYTE_CACHE_FIELDS_DO(macro) \ 4448 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 4449 4450 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 4451 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4452 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4453 } 4454 4455 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 4456 oop base = ik->static_field_base_raw(); 4457 return objArrayOop(base->obj_field(_static_cache_offset)); 4458 } 4459 4460 Symbol* java_lang_Byte_ByteCache::symbol() { 4461 return vmSymbols::java_lang_Byte_ByteCache(); 4462 } 4463 4464 #if INCLUDE_CDS 4465 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 4466 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4467 } 4468 #endif 4469 #undef BYTE_CACHE_FIELDS_DO 4470 4471 jbyte java_lang_Byte::value(oop obj) { 4472 jvalue v; 4473 java_lang_boxing_object::get_value(obj, &v); 4474 return v.b; 4475 } 4476 #define BOOLEAN_FIELDS_DO(macro) \ 4477 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 4478 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 4479 4480 4481 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 4482 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized"); 4483 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4484 } 4485 4486 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 4487 oop base = ik->static_field_base_raw(); 4488 return base->obj_field(_static_TRUE_offset); 4489 } 4490 4491 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 4492 oop base = ik->static_field_base_raw(); 4493 return base->obj_field(_static_FALSE_offset); 4494 } 4495 4496 Symbol* java_lang_Boolean::symbol() { 4497 return vmSymbols::java_lang_Boolean(); 4498 } 4499 4500 #if INCLUDE_CDS 4501 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 4502 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4503 } 4504 #endif 4505 #undef BOOLEAN_CACHE_FIELDS_DO 4506 4507 jboolean java_lang_Boolean::value(oop obj) { 4508 jvalue v; 4509 java_lang_boxing_object::get_value(obj, &v); 4510 return v.z; 4511 } 4512 4513 static int member_offset(int hardcoded_offset) { 4514 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4515 } 4516 4517 // Compute hard-coded offsets 4518 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4519 // are not available to determine the offset_of_static_fields. 4520 void JavaClasses::compute_hard_coded_offsets() { 4521 4522 // java_lang_boxing_object 4523 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4524 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4525 4526 // java_lang_ref_Reference 4527 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4528 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4529 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4530 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4531 } 4532 4533 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4534 4535 // Compute non-hard-coded field offsets of all the classes in this file 4536 void JavaClasses::compute_offsets() { 4537 if (UseSharedSpaces) { 4538 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 4539 JvmtiExport::has_early_class_hook_env()), 4540 "JavaClasses::compute_offsets() must be called in early JVMTI phase."); 4541 // None of the classes used by the rest of this function can be replaced by 4542 // JMVTI ClassFileLoadHook. 4543 // We are safe to use the archived offsets, which have already been restored 4544 // by JavaClasses::serialize_offsets, without computing the offsets again. 4545 return; 4546 } 4547 4548 // We have already called the compute_offsets() of the 4549 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4550 // earlier inside SystemDictionary::resolve_well_known_classes() 4551 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4552 } 4553 4554 #if INCLUDE_CDS 4555 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4556 4557 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4558 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4559 } 4560 #endif 4561 4562 4563 #ifndef PRODUCT 4564 4565 // These functions exist to assert the validity of hard-coded field offsets to guard 4566 // against changes in the class files 4567 4568 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4569 EXCEPTION_MARK; 4570 fieldDescriptor fd; 4571 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 4572 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4573 InstanceKlass* ik = InstanceKlass::cast(k); 4574 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 4575 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 4576 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4577 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4578 return false; 4579 } 4580 if (fd.is_static()) { 4581 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4582 return false; 4583 } 4584 if (fd.offset() == hardcoded_offset ) { 4585 return true; 4586 } else { 4587 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4588 klass_name, field_name, hardcoded_offset, fd.offset()); 4589 return false; 4590 } 4591 } 4592 4593 // Check the hard-coded field offsets of all the classes in this file 4594 4595 void JavaClasses::check_offsets() { 4596 bool valid = true; 4597 4598 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4599 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4600 4601 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4602 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4603 4604 // Boxed primitive objects (java_lang_boxing_object) 4605 4606 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4607 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4608 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4609 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4610 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4611 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4612 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4613 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4614 4615 // java.lang.ref.Reference 4616 4617 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4618 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4619 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4620 // Fake field 4621 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4622 4623 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4624 } 4625 4626 #endif // PRODUCT 4627 4628 int InjectedField::compute_offset() { 4629 InstanceKlass* ik = InstanceKlass::cast(klass()); 4630 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4631 if (!may_be_java && !fs.access_flags().is_internal()) { 4632 // Only look at injected fields 4633 continue; 4634 } 4635 if (fs.name() == name() && fs.signature() == signature()) { 4636 return fs.offset(); 4637 } 4638 } 4639 ResourceMark rm; 4640 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)" : ""); 4641 #ifndef PRODUCT 4642 ik->print(); 4643 tty->print_cr("all fields:"); 4644 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4645 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4646 } 4647 #endif //PRODUCT 4648 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 4649 return -1; 4650 } 4651 4652 void javaClasses_init() { 4653 JavaClasses::compute_offsets(); 4654 JavaClasses::check_offsets(); 4655 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4656 }