1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "logging/log.hpp" 38 #include "logging/logStream.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/metaspaceShared.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "oops/fieldStreams.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceMirrorKlass.hpp" 46 #include "oops/klass.hpp" 47 #include "oops/method.inline.hpp" 48 #include "oops/objArrayOop.inline.hpp" 49 #include "oops/oop.inline.hpp" 50 #include "oops/symbol.hpp" 51 #include "oops/typeArrayOop.inline.hpp" 52 #include "prims/resolvedMethodTable.hpp" 53 #include "runtime/fieldDescriptor.hpp" 54 #include "runtime/frame.inline.hpp" 55 #include "runtime/handles.inline.hpp" 56 #include "runtime/interfaceSupport.inline.hpp" 57 #include "runtime/java.hpp" 58 #include "runtime/javaCalls.hpp" 59 #include "runtime/jniHandles.inline.hpp" 60 #include "runtime/safepoint.hpp" 61 #include "runtime/safepointVerifiers.hpp" 62 #include "runtime/thread.inline.hpp" 63 #include "runtime/vframe.inline.hpp" 64 #include "utilities/align.hpp" 65 #include "utilities/preserveException.hpp" 66 67 #if INCLUDE_JVMCI 68 #include "jvmci/jvmciJavaClasses.hpp" 69 #endif 70 71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 73 74 #if INCLUDE_CDS 75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 76 f->do_u4((u4*)&_##name##_offset); 77 #endif 78 79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 81 82 InjectedField JavaClasses::_injected_fields[] = { 83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 84 }; 85 86 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 87 return _injected_fields[id].compute_offset(); 88 } 89 90 91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 92 *field_count = 0; 93 94 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 95 if (sid == vmSymbols::NO_SID) { 96 // Only well known classes can inject fields 97 return NULL; 98 } 99 100 int count = 0; 101 int start = -1; 102 103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 105 count++; \ 106 if (start == -1) start = klass##_##name##_enum; \ 107 } 108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 109 #undef LOOKUP_INJECTED_FIELD 110 111 if (start != -1) { 112 *field_count = count; 113 return _injected_fields + start; 114 } 115 return NULL; 116 } 117 118 119 // Helpful routine for computing field offsets at run time rather than hardcoding them 120 // Finds local fields only, including static fields. Static field offsets are from the 121 // beginning of the mirror. 122 static void compute_offset(int &dest_offset, 123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 124 bool is_static = false) { 125 fieldDescriptor fd; 126 if (ik == NULL) { 127 ResourceMark rm; 128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 129 vm_exit_during_initialization("Invalid layout of preloaded class"); 130 } 131 132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 133 ResourceMark rm; 134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 135 name_symbol->as_C_string(), signature_symbol->as_C_string()); 136 #ifndef PRODUCT 137 // Prints all fields and offsets 138 Log(class) lt; 139 LogStream ls(lt.error()); 140 ik->print_on(&ls); 141 #endif //PRODUCT 142 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 143 } 144 dest_offset = fd.offset(); 145 } 146 147 // Overloading to pass name as a string. 148 static void compute_offset(int& dest_offset, InstanceKlass* ik, 149 const char* name_string, Symbol* signature_symbol, 150 bool is_static = false) { 151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 152 if (name == NULL) { 153 ResourceMark rm; 154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 155 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name()); 156 } 157 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 158 } 159 160 // Same as above but for "optional" offsets that might not be present in certain JDK versions 161 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this 162 // function should be removed. 163 static void 164 compute_optional_offset(int& dest_offset, 165 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) { 166 fieldDescriptor fd; 167 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { 168 dest_offset = fd.offset(); 169 } 170 } 171 172 int java_lang_String::value_offset = 0; 173 int java_lang_String::hash_offset = 0; 174 int java_lang_String::coder_offset = 0; 175 176 bool java_lang_String::initialized = false; 177 178 bool java_lang_String::is_instance(oop obj) { 179 return is_instance_inlined(obj); 180 } 181 182 #if INCLUDE_CDS 183 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 184 f->do_u4((u4*)&offset) 185 186 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 187 f->do_u4((u4*)&offset) 188 #endif 189 190 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 191 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 192 193 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 194 compute_optional_offset(offset, klass, name, vmSymbols::signature()) 195 196 #define STRING_FIELDS_DO(macro) \ 197 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 198 macro(hash_offset, k, "hash", int_signature, false); \ 199 macro(coder_offset, k, "coder", byte_signature, false) 200 201 void java_lang_String::compute_offsets() { 202 if (initialized) { 203 return; 204 } 205 206 InstanceKlass* k = SystemDictionary::String_klass(); 207 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 208 209 initialized = true; 210 } 211 212 #if INCLUDE_CDS 213 void java_lang_String::serialize(SerializeClosure* f) { 214 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 215 f->do_u4((u4*)&initialized); 216 } 217 #endif 218 219 class CompactStringsFixup : public FieldClosure { 220 private: 221 bool _value; 222 223 public: 224 CompactStringsFixup(bool value) : _value(value) {} 225 226 void do_field(fieldDescriptor* fd) { 227 if (fd->name() == vmSymbols::compact_strings_name()) { 228 oop mirror = fd->field_holder()->java_mirror(); 229 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 230 assert(mirror != NULL, "String must have mirror already"); 231 mirror->bool_field_put(fd->offset(), _value); 232 } 233 } 234 }; 235 236 void java_lang_String::set_compact_strings(bool value) { 237 CompactStringsFixup fix(value); 238 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 239 } 240 241 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 242 assert(initialized, "Must be initialized"); 243 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 244 245 // Create the String object first, so there's a chance that the String 246 // and the char array it points to end up in the same cache line. 247 oop obj; 248 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 249 250 // Create the char array. The String object must be handlized here 251 // because GC can happen as a result of the allocation attempt. 252 Handle h_obj(THREAD, obj); 253 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 254 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 255 256 // Point the String at the char array 257 obj = h_obj(); 258 set_value(obj, buffer); 259 // No need to zero the offset, allocation zero'ed the entire String object 260 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 261 return h_obj; 262 } 263 264 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 265 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 266 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 267 typeArrayOop buffer = value(h_obj()); 268 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 269 if (is_latin1) { 270 for (int index = 0; index < length; index++) { 271 buffer->byte_at_put(index, (jbyte)unicode[index]); 272 } 273 } else { 274 for (int index = 0; index < length; index++) { 275 buffer->char_at_put(index, unicode[index]); 276 } 277 } 278 279 #ifdef ASSERT 280 { 281 ResourceMark rm; 282 char* expected = UNICODE::as_utf8(unicode, length); 283 char* actual = as_utf8_string(h_obj()); 284 if (strcmp(expected, actual) != 0) { 285 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 286 ShouldNotReachHere(); 287 } 288 } 289 #endif 290 291 return h_obj; 292 } 293 294 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 295 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 296 return h_obj(); 297 } 298 299 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 300 if (utf8_str == NULL) { 301 return Handle(); 302 } 303 bool has_multibyte, is_latin1; 304 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 305 if (!CompactStrings) { 306 has_multibyte = true; 307 is_latin1 = false; 308 } 309 310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 311 if (length > 0) { 312 if (!has_multibyte) { 313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 314 } else if (is_latin1) { 315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 316 } else { 317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 318 } 319 } 320 321 #ifdef ASSERT 322 // This check is too strict because the input string is not necessarily valid UTF8. 323 // For example, it may be created with arbitrary content via jni_NewStringUTF. 324 /* 325 { 326 ResourceMark rm; 327 const char* expected = utf8_str; 328 char* actual = as_utf8_string(h_obj()); 329 if (strcmp(expected, actual) != 0) { 330 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 331 ShouldNotReachHere(); 332 } 333 } 334 */ 335 #endif 336 337 return h_obj; 338 } 339 340 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 341 Handle h_obj = create_from_str(utf8_str, CHECK_0); 342 return h_obj(); 343 } 344 345 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 346 const char* utf8_str = (char*)symbol->bytes(); 347 int utf8_len = symbol->utf8_length(); 348 349 bool has_multibyte, is_latin1; 350 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 351 if (!CompactStrings) { 352 has_multibyte = true; 353 is_latin1 = false; 354 } 355 356 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 357 if (length > 0) { 358 if (!has_multibyte) { 359 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 360 } else if (is_latin1) { 361 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 362 } else { 363 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 364 } 365 } 366 367 #ifdef ASSERT 368 { 369 ResourceMark rm; 370 const char* expected = symbol->as_utf8(); 371 char* actual = as_utf8_string(h_obj()); 372 if (strncmp(expected, actual, utf8_len) != 0) { 373 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 374 ShouldNotReachHere(); 375 } 376 } 377 #endif 378 379 return h_obj; 380 } 381 382 // Converts a C string to a Java String based on current encoding 383 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 384 assert(str != NULL, "bad arguments"); 385 386 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 387 static to_java_string_fn_t _to_java_string_fn = NULL; 388 389 if (_to_java_string_fn == NULL) { 390 void *lib_handle = os::native_java_library(); 391 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 392 if (_to_java_string_fn == NULL) { 393 fatal("NewStringPlatform missing"); 394 } 395 } 396 397 jstring js = NULL; 398 { JavaThread* thread = (JavaThread*)THREAD; 399 assert(thread->is_Java_thread(), "must be java thread"); 400 HandleMark hm(thread); 401 ThreadToNativeFromVM ttn(thread); 402 js = (_to_java_string_fn)(thread->jni_environment(), str); 403 } 404 return Handle(THREAD, JNIHandles::resolve(js)); 405 } 406 407 // Converts a Java String to a native C string that can be used for 408 // native OS calls. 409 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 410 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 411 static to_platform_string_fn_t _to_platform_string_fn = NULL; 412 413 if (_to_platform_string_fn == NULL) { 414 void *lib_handle = os::native_java_library(); 415 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 416 if (_to_platform_string_fn == NULL) { 417 fatal("GetStringPlatformChars missing"); 418 } 419 } 420 421 char *native_platform_string; 422 { JavaThread* thread = (JavaThread*)THREAD; 423 assert(thread->is_Java_thread(), "must be java thread"); 424 JNIEnv *env = thread->jni_environment(); 425 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 426 bool is_copy; 427 HandleMark hm(thread); 428 ThreadToNativeFromVM ttn(thread); 429 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 430 assert(is_copy == JNI_TRUE, "is_copy value changed"); 431 JNIHandles::destroy_local(js); 432 } 433 return native_platform_string; 434 } 435 436 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 437 oop obj = java_string(); 438 // Typical usage is to convert all '/' to '.' in string. 439 typeArrayOop value = java_lang_String::value(obj); 440 int length = java_lang_String::length(obj); 441 bool is_latin1 = java_lang_String::is_latin1(obj); 442 443 // First check if any from_char exist 444 int index; // Declared outside, used later 445 for (index = 0; index < length; index++) { 446 jchar c = !is_latin1 ? value->char_at(index) : 447 ((jchar) value->byte_at(index)) & 0xff; 448 if (c == from_char) { 449 break; 450 } 451 } 452 if (index == length) { 453 // No from_char, so do not copy. 454 return java_string; 455 } 456 457 // Check if result string will be latin1 458 bool to_is_latin1 = false; 459 460 // Replacement char must be latin1 461 if (CompactStrings && UNICODE::is_latin1(to_char)) { 462 if (is_latin1) { 463 // Source string is latin1 as well 464 to_is_latin1 = true; 465 } else if (!UNICODE::is_latin1(from_char)) { 466 // We are replacing an UTF16 char. Scan string to 467 // check if result can be latin1 encoded. 468 to_is_latin1 = true; 469 for (index = 0; index < length; index++) { 470 jchar c = value->char_at(index); 471 if (c != from_char && !UNICODE::is_latin1(c)) { 472 to_is_latin1 = false; 473 break; 474 } 475 } 476 } 477 } 478 479 // Create new UNICODE (or byte) buffer. Must handlize value because GC 480 // may happen during String and char array creation. 481 typeArrayHandle h_value(THREAD, value); 482 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 483 typeArrayOop from_buffer = h_value(); 484 typeArrayOop to_buffer = java_lang_String::value(string()); 485 486 // Copy contents 487 for (index = 0; index < length; index++) { 488 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 489 ((jchar) from_buffer->byte_at(index)) & 0xff; 490 if (c == from_char) { 491 c = to_char; 492 } 493 if (!to_is_latin1) { 494 to_buffer->char_at_put(index, c); 495 } else { 496 to_buffer->byte_at_put(index, (jbyte) c); 497 } 498 } 499 return string; 500 } 501 502 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 503 typeArrayOop value = java_lang_String::value(java_string); 504 length = java_lang_String::length(java_string); 505 bool is_latin1 = java_lang_String::is_latin1(java_string); 506 507 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 508 if (result != NULL) { 509 if (!is_latin1) { 510 for (int index = 0; index < length; index++) { 511 result[index] = value->char_at(index); 512 } 513 } else { 514 for (int index = 0; index < length; index++) { 515 result[index] = ((jchar) value->byte_at(index)) & 0xff; 516 } 517 } 518 } else { 519 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 520 } 521 return result; 522 } 523 524 unsigned int java_lang_String::hash_code(oop java_string) { 525 int length = java_lang_String::length(java_string); 526 // Zero length string will hash to zero with String.hashCode() function. 527 if (length == 0) return 0; 528 529 typeArrayOop value = java_lang_String::value(java_string); 530 bool is_latin1 = java_lang_String::is_latin1(java_string); 531 532 if (is_latin1) { 533 return java_lang_String::hash_code(value->byte_at_addr(0), length); 534 } else { 535 return java_lang_String::hash_code(value->char_at_addr(0), length); 536 } 537 } 538 539 char* java_lang_String::as_quoted_ascii(oop java_string) { 540 typeArrayOop value = java_lang_String::value(java_string); 541 int length = java_lang_String::length(java_string); 542 bool is_latin1 = java_lang_String::is_latin1(java_string); 543 544 if (length == 0) return NULL; 545 546 char* result; 547 int result_length; 548 if (!is_latin1) { 549 jchar* base = value->char_at_addr(0); 550 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 551 result = NEW_RESOURCE_ARRAY(char, result_length); 552 UNICODE::as_quoted_ascii(base, length, result, result_length); 553 } else { 554 jbyte* base = value->byte_at_addr(0); 555 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 556 result = NEW_RESOURCE_ARRAY(char, result_length); 557 UNICODE::as_quoted_ascii(base, length, result, result_length); 558 } 559 assert(result_length >= length + 1, "must not be shorter"); 560 assert(result_length == (int)strlen(result) + 1, "must match"); 561 return result; 562 } 563 564 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 570 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 571 return sym; 572 } else { 573 ResourceMark rm; 574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 575 const char* base = UNICODE::as_utf8(position, length); 576 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 577 return sym; 578 } 579 } 580 581 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 582 typeArrayOop value = java_lang_String::value(java_string); 583 int length = java_lang_String::length(java_string); 584 bool is_latin1 = java_lang_String::is_latin1(java_string); 585 if (!is_latin1) { 586 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 587 return SymbolTable::probe_unicode(base, length); 588 } else { 589 ResourceMark rm; 590 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 591 const char* base = UNICODE::as_utf8(position, length); 592 return SymbolTable::probe(base, length); 593 } 594 } 595 596 int java_lang_String::utf8_length(oop java_string) { 597 typeArrayOop value = java_lang_String::value(java_string); 598 int length = java_lang_String::length(java_string); 599 bool is_latin1 = java_lang_String::is_latin1(java_string); 600 if (length == 0) { 601 return 0; 602 } 603 if (!is_latin1) { 604 return UNICODE::utf8_length(value->char_at_addr(0), length); 605 } else { 606 return UNICODE::utf8_length(value->byte_at_addr(0), length); 607 } 608 } 609 610 char* java_lang_String::as_utf8_string(oop java_string) { 611 typeArrayOop value = java_lang_String::value(java_string); 612 int length = java_lang_String::length(java_string); 613 bool is_latin1 = java_lang_String::is_latin1(java_string); 614 if (!is_latin1) { 615 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 616 return UNICODE::as_utf8(position, length); 617 } else { 618 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 619 return UNICODE::as_utf8(position, length); 620 } 621 } 622 623 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 int length = java_lang_String::length(java_string); 626 bool is_latin1 = java_lang_String::is_latin1(java_string); 627 if (!is_latin1) { 628 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 629 return UNICODE::as_utf8(position, length, buf, buflen); 630 } else { 631 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 632 return UNICODE::as_utf8(position, length, buf, buflen); 633 } 634 } 635 636 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 637 typeArrayOop value = java_lang_String::value(java_string); 638 int length = java_lang_String::length(java_string); 639 assert(start + len <= length, "just checking"); 640 bool is_latin1 = java_lang_String::is_latin1(java_string); 641 if (!is_latin1) { 642 jchar* position = value->char_at_addr(start); 643 return UNICODE::as_utf8(position, len); 644 } else { 645 jbyte* position = value->byte_at_addr(start); 646 return UNICODE::as_utf8(position, len); 647 } 648 } 649 650 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 651 typeArrayOop value = java_lang_String::value(java_string); 652 int length = java_lang_String::length(java_string); 653 assert(start + len <= length, "just checking"); 654 bool is_latin1 = java_lang_String::is_latin1(java_string); 655 if (!is_latin1) { 656 jchar* position = value->char_at_addr(start); 657 return UNICODE::as_utf8(position, len, buf, buflen); 658 } else { 659 jbyte* position = value->byte_at_addr(start); 660 return UNICODE::as_utf8(position, len, buf, buflen); 661 } 662 } 663 664 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 665 assert(java_string->klass() == SystemDictionary::String_klass(), 666 "must be java_string"); 667 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 668 int length = java_lang_String::length(java_string); 669 if (length != len) { 670 return false; 671 } 672 bool is_latin1 = java_lang_String::is_latin1(java_string); 673 if (!is_latin1) { 674 for (int i = 0; i < len; i++) { 675 if (value->char_at(i) != chars[i]) { 676 return false; 677 } 678 } 679 } else { 680 for (int i = 0; i < len; i++) { 681 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 682 return false; 683 } 684 } 685 } 686 return true; 687 } 688 689 bool java_lang_String::equals(oop str1, oop str2) { 690 assert(str1->klass() == SystemDictionary::String_klass(), 691 "must be java String"); 692 assert(str2->klass() == SystemDictionary::String_klass(), 693 "must be java String"); 694 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 695 int length1 = java_lang_String::length(str1); 696 bool is_latin1 = java_lang_String::is_latin1(str1); 697 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 698 int length2 = java_lang_String::length(str2); 699 bool is_latin2 = java_lang_String::is_latin1(str2); 700 701 if ((length1 != length2) || (is_latin1 != is_latin2)) { 702 // Strings of different size or with different 703 // coders are never equal. 704 return false; 705 } 706 int blength1 = value1->length(); 707 for (int i = 0; i < blength1; i++) { 708 if (value1->byte_at(i) != value2->byte_at(i)) { 709 return false; 710 } 711 } 712 return true; 713 } 714 715 void java_lang_String::print(oop java_string, outputStream* st) { 716 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 717 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 718 719 if (value == NULL) { 720 // This can happen if, e.g., printing a String 721 // object before its initializer has been called 722 st->print("NULL"); 723 return; 724 } 725 726 int length = java_lang_String::length(java_string); 727 bool is_latin1 = java_lang_String::is_latin1(java_string); 728 729 st->print("\""); 730 for (int index = 0; index < length; index++) { 731 st->print("%c", (!is_latin1) ? value->char_at(index) : 732 ((jchar) value->byte_at(index)) & 0xff ); 733 } 734 st->print("\""); 735 } 736 737 738 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 739 assert(mirror.not_null() && fd->is_static(), "just checking"); 740 if (fd->has_initial_value()) { 741 BasicType t = fd->field_type(); 742 switch (t) { 743 case T_BYTE: 744 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 745 break; 746 case T_BOOLEAN: 747 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 748 break; 749 case T_CHAR: 750 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 751 break; 752 case T_SHORT: 753 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 754 break; 755 case T_INT: 756 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 757 break; 758 case T_FLOAT: 759 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 760 break; 761 case T_DOUBLE: 762 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 763 break; 764 case T_LONG: 765 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 766 break; 767 case T_OBJECT: 768 { 769 assert(fd->signature() == vmSymbols::string_signature(), 770 "just checking"); 771 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) { 772 // Archive the String field and update the pointer. 773 oop s = mirror()->obj_field(fd->offset()); 774 oop archived_s = StringTable::create_archived_string(s, CHECK); 775 mirror()->obj_field_put(fd->offset(), archived_s); 776 } else { 777 oop string = fd->string_initial_value(CHECK); 778 mirror()->obj_field_put(fd->offset(), string); 779 } 780 } 781 break; 782 default: 783 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 784 "Illegal ConstantValue attribute in class file"); 785 } 786 } 787 } 788 789 790 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 791 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 792 793 // If the offset was read from the shared archive, it was fixed up already 794 if (!k->is_shared()) { 795 if (k->is_instance_klass()) { 796 // During bootstrap, java.lang.Class wasn't loaded so static field 797 // offsets were computed without the size added it. Go back and 798 // update all the static field offsets to included the size. 799 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 800 if (fs.access_flags().is_static()) { 801 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 802 fs.set_offset(real_offset); 803 } 804 } 805 } 806 } 807 808 if (k->is_shared() && k->has_raw_archived_mirror()) { 809 if (MetaspaceShared::open_archive_heap_region_mapped()) { 810 oop m = k->archived_java_mirror(); 811 assert(m != NULL, "archived mirror is NULL"); 812 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object"); 813 Handle m_h(THREAD, m); 814 // restore_archived_mirror() clears the klass' _has_raw_archived_mirror flag 815 restore_archived_mirror(k, m_h, Handle(), Handle(), Handle(), CHECK); 816 return; 817 } else { 818 k->set_java_mirror_handle(NULL); 819 k->clear_has_raw_archived_mirror(); 820 } 821 } 822 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 823 } 824 825 void java_lang_Class::initialize_mirror_fields(Klass* k, 826 Handle mirror, 827 Handle protection_domain, 828 TRAPS) { 829 // Allocate a simple java object for a lock. 830 // This needs to be a java object because during class initialization 831 // it can be held across a java call. 832 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 833 set_init_lock(mirror(), r); 834 835 // Set protection domain also 836 set_protection_domain(mirror(), protection_domain()); 837 838 // Initialize static fields 839 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 840 } 841 842 // Set the java.lang.Module module field in the java_lang_Class mirror 843 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 844 if (module.is_null()) { 845 // During startup, the module may be NULL only if java.base has not been defined yet. 846 // Put the class on the fixup_module_list to patch later when the java.lang.Module 847 // for java.base is known. 848 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 849 850 bool javabase_was_defined = false; 851 { 852 MutexLocker m1(Module_lock, THREAD); 853 // Keep list of classes needing java.base module fixup 854 if (!ModuleEntryTable::javabase_defined()) { 855 assert(k->java_mirror() != NULL, "Class's mirror is null"); 856 k->class_loader_data()->inc_keep_alive(); 857 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 858 fixup_module_field_list()->push(k); 859 } else { 860 javabase_was_defined = true; 861 } 862 } 863 864 // If java.base was already defined then patch this particular class with java.base. 865 if (javabase_was_defined) { 866 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 867 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 868 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 869 Handle javabase_handle(THREAD, javabase_entry->module()); 870 set_module(mirror(), javabase_handle()); 871 } 872 } else { 873 assert(Universe::is_module_initialized() || 874 (ModuleEntryTable::javabase_defined() && 875 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 876 "Incorrect java.lang.Module specification while creating mirror"); 877 set_module(mirror(), module()); 878 } 879 } 880 881 // Statically allocate fixup lists because they always get created. 882 void java_lang_Class::allocate_fixup_lists() { 883 GrowableArray<Klass*>* mirror_list = 884 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 885 set_fixup_mirror_list(mirror_list); 886 887 GrowableArray<Klass*>* module_list = 888 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 889 set_fixup_module_field_list(module_list); 890 } 891 892 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 893 Handle module, Handle protection_domain, TRAPS) { 894 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 895 assert(k->java_mirror() == NULL, "should only assign mirror once"); 896 897 // Use this moment of initialization to cache modifier_flags also, 898 // to support Class.getModifiers(). Instance classes recalculate 899 // the cached flags after the class file is parsed, but before the 900 // class is put into the system dictionary. 901 int computed_modifiers = k->compute_modifier_flags(CHECK); 902 k->set_modifier_flags(computed_modifiers); 903 // Class_klass has to be loaded because it is used to allocate 904 // the mirror. 905 if (SystemDictionary::Class_klass_loaded()) { 906 // Allocate mirror (java.lang.Class instance) 907 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 908 Handle mirror(THREAD, mirror_oop); 909 Handle comp_mirror; 910 911 // Setup indirection from mirror->klass 912 java_lang_Class::set_klass(mirror(), k); 913 914 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 915 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 916 917 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 918 919 // It might also have a component mirror. This mirror must already exist. 920 if (k->is_array_klass()) { 921 if (k->is_typeArray_klass()) { 922 BasicType type = TypeArrayKlass::cast(k)->element_type(); 923 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 924 } else { 925 assert(k->is_objArray_klass(), "Must be"); 926 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 927 assert(element_klass != NULL, "Must have an element klass"); 928 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 929 } 930 assert(comp_mirror() != NULL, "must have a mirror"); 931 932 // Two-way link between the array klass and its component mirror: 933 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 934 set_component_mirror(mirror(), comp_mirror()); 935 // See below for ordering dependencies between field array_klass in component mirror 936 // and java_mirror in this klass. 937 } else { 938 assert(k->is_instance_klass(), "Must be"); 939 940 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 941 if (HAS_PENDING_EXCEPTION) { 942 // If any of the fields throws an exception like OOM remove the klass field 943 // from the mirror so GC doesn't follow it after the klass has been deallocated. 944 // This mirror looks like a primitive type, which logically it is because it 945 // it represents no class. 946 java_lang_Class::set_klass(mirror(), NULL); 947 return; 948 } 949 } 950 951 // set the classLoader field in the java_lang_Class instance 952 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 953 set_class_loader(mirror(), class_loader()); 954 955 // Setup indirection from klass->mirror 956 // after any exceptions can happen during allocations. 957 k->set_java_mirror(mirror); 958 959 // Set the module field in the java_lang_Class instance. This must be done 960 // after the mirror is set. 961 set_mirror_module_field(k, mirror, module, THREAD); 962 963 if (comp_mirror() != NULL) { 964 // Set after k->java_mirror() is published, because compiled code running 965 // concurrently doesn't expect a k to have a null java_mirror. 966 release_set_array_klass(comp_mirror(), k); 967 } 968 } else { 969 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 970 fixup_mirror_list()->push(k); 971 } 972 } 973 974 #if INCLUDE_CDS_JAVA_HEAP 975 // Clears mirror fields. Static final fields with initial values are reloaded 976 // from constant pool. The object identity hash is in the object header and is 977 // not affected. 978 class ResetMirrorField: public FieldClosure { 979 private: 980 Handle _m; 981 982 public: 983 ResetMirrorField(Handle mirror) : _m(mirror) {} 984 985 void do_field(fieldDescriptor* fd) { 986 assert(DumpSharedSpaces, "dump time only"); 987 assert(_m.not_null(), "Mirror cannot be NULL"); 988 989 if (fd->is_static() && fd->has_initial_value()) { 990 initialize_static_field(fd, _m, Thread::current()); 991 return; 992 } 993 994 BasicType ft = fd->field_type(); 995 switch (ft) { 996 case T_BYTE: 997 _m()->byte_field_put(fd->offset(), 0); 998 break; 999 case T_CHAR: 1000 _m()->char_field_put(fd->offset(), 0); 1001 break; 1002 case T_DOUBLE: 1003 _m()->double_field_put(fd->offset(), 0); 1004 break; 1005 case T_FLOAT: 1006 _m()->float_field_put(fd->offset(), 0); 1007 break; 1008 case T_INT: 1009 _m()->int_field_put(fd->offset(), 0); 1010 break; 1011 case T_LONG: 1012 _m()->long_field_put(fd->offset(), 0); 1013 break; 1014 case T_SHORT: 1015 _m()->short_field_put(fd->offset(), 0); 1016 break; 1017 case T_BOOLEAN: 1018 _m()->bool_field_put(fd->offset(), false); 1019 break; 1020 case T_ARRAY: 1021 case T_OBJECT: { 1022 // It might be useful to cache the String field, but 1023 // for now just clear out any reference field 1024 oop o = _m()->obj_field(fd->offset()); 1025 _m()->obj_field_put(fd->offset(), NULL); 1026 break; 1027 } 1028 default: 1029 ShouldNotReachHere(); 1030 break; 1031 } 1032 } 1033 }; 1034 1035 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1036 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1037 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1038 1039 for (int t = 0; t <= T_VOID; t++) { 1040 oop m = Universe::_mirrors[t]; 1041 if (m != NULL) { 1042 // Update the field at _array_klass_offset to point to the relocated array klass. 1043 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD); 1044 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1045 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1046 if (ak != NULL) { 1047 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1048 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1049 } 1050 1051 // Clear the fields. Just to be safe 1052 Klass *k = m->klass(); 1053 Handle archived_mirror_h(THREAD, archived_m); 1054 ResetMirrorField reset(archived_mirror_h); 1055 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1056 1057 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1058 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1059 1060 Universe::_mirrors[t] = archived_m; 1061 } 1062 } 1063 1064 assert(Universe::_mirrors[T_INT] != NULL && 1065 Universe::_mirrors[T_FLOAT] != NULL && 1066 Universe::_mirrors[T_DOUBLE] != NULL && 1067 Universe::_mirrors[T_BYTE] != NULL && 1068 Universe::_mirrors[T_BOOLEAN] != NULL && 1069 Universe::_mirrors[T_CHAR] != NULL && 1070 Universe::_mirrors[T_LONG] != NULL && 1071 Universe::_mirrors[T_SHORT] != NULL && 1072 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1073 1074 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1075 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1076 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1077 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1078 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1079 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1080 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1081 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1082 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1083 } 1084 1085 // 1086 // After the mirror object is successfully archived, the archived 1087 // klass is set with _has_archived_raw_mirror flag. 1088 // 1089 // The _has_archived_raw_mirror flag is cleared at runtime when the 1090 // archived mirror is restored. If archived java heap data cannot 1091 // be used at runtime, new mirror object is created for the shared 1092 // class. The _has_archived_raw_mirror is cleared also during the process. 1093 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1094 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1095 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1096 1097 // Mirror is already archived 1098 if (k->has_raw_archived_mirror()) { 1099 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1100 return k->archived_java_mirror_raw(); 1101 } 1102 1103 // No mirror 1104 oop mirror = k->java_mirror(); 1105 if (mirror == NULL) { 1106 return NULL; 1107 } 1108 1109 if (k->is_instance_klass()) { 1110 InstanceKlass *ik = InstanceKlass::cast(k); 1111 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1112 "class with signer cannot be supported"); 1113 1114 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1115 ik->is_shared_app_class())) { 1116 // Archiving mirror for classes from non-builtin loaders is not 1117 // supported. Clear the _java_mirror within the archived class. 1118 k->set_java_mirror_handle(NULL); 1119 return NULL; 1120 } 1121 } 1122 1123 // Now start archiving the mirror object 1124 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD); 1125 if (archived_mirror == NULL) { 1126 return NULL; 1127 } 1128 1129 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1130 if (archived_mirror == NULL) { 1131 return NULL; 1132 } 1133 1134 k->set_archived_java_mirror_raw(archived_mirror); 1135 1136 k->set_has_raw_archived_mirror(); 1137 1138 ResourceMark rm; 1139 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1140 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1141 1142 return archived_mirror; 1143 } 1144 1145 // The process is based on create_mirror(). 1146 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1147 oop archived_mirror, 1148 Thread *THREAD) { 1149 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1150 // to archived metadata and objects below. 1151 Klass *c = archived_mirror->klass(); 1152 Handle archived_mirror_h(THREAD, archived_mirror); 1153 ResetMirrorField reset(archived_mirror_h); 1154 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1155 1156 if (k->is_array_klass()) { 1157 oop archived_comp_mirror; 1158 if (k->is_typeArray_klass()) { 1159 // The primitive type mirrors are already archived. Get the archived mirror. 1160 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1161 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror); 1162 assert(archived_comp_mirror != NULL, "Must be"); 1163 } else { 1164 assert(k->is_objArray_klass(), "Must be"); 1165 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1166 assert(element_klass != NULL, "Must have an element klass"); 1167 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1168 if (archived_comp_mirror == NULL) { 1169 return NULL; 1170 } 1171 } 1172 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1173 } else { 1174 assert(k->is_instance_klass(), "Must be"); 1175 1176 // Reset local static fields in the mirror 1177 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1178 1179 java_lang_Class:set_init_lock(archived_mirror, NULL); 1180 1181 set_protection_domain(archived_mirror, NULL); 1182 } 1183 1184 // clear class loader and mirror_module_field 1185 set_class_loader(archived_mirror, NULL); 1186 set_module(archived_mirror, NULL); 1187 1188 // The archived mirror's field at _klass_offset is still pointing to the original 1189 // klass. Updated the field in the archived mirror to point to the relocated 1190 // klass in the archive. 1191 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1192 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1193 p2i(as_Klass(mirror)), p2i(reloc_k)); 1194 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1195 1196 // The field at _array_klass_offset is pointing to the original one dimension 1197 // higher array klass if exists. Relocate the pointer. 1198 Klass *arr = array_klass_acquire(mirror); 1199 if (arr != NULL) { 1200 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1201 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1202 p2i(arr), p2i(reloc_arr)); 1203 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1204 } 1205 return archived_mirror; 1206 } 1207 1208 // After the archived mirror object is restored, the shared klass' 1209 // _has_raw_archived_mirror flag is cleared 1210 void java_lang_Class::restore_archived_mirror(Klass *k, Handle mirror, 1211 Handle class_loader, Handle module, 1212 Handle protection_domain, TRAPS) { 1213 1214 // The java.lang.Class field offsets were archived and reloaded from archive. 1215 // No need to put classes on the fixup_mirror_list before java.lang.Class 1216 // is loaded. 1217 1218 if (!k->is_array_klass()) { 1219 // - local static final fields with initial values were initialized at dump time 1220 1221 // create the init_lock 1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 1223 set_init_lock(mirror(), r); 1224 1225 if (protection_domain.not_null()) { 1226 set_protection_domain(mirror(), protection_domain()); 1227 } 1228 } 1229 1230 assert(class_loader() == k->class_loader(), "should be same"); 1231 if (class_loader.not_null()) { 1232 set_class_loader(mirror(), class_loader()); 1233 } 1234 1235 k->set_java_mirror(mirror); 1236 k->clear_has_raw_archived_mirror(); 1237 1238 set_mirror_module_field(k, mirror, module, THREAD); 1239 1240 ResourceMark rm; 1241 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1242 } 1243 #endif // INCLUDE_CDS_JAVA_HEAP 1244 1245 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1246 assert(_module_offset != 0, "must have been computed already"); 1247 java_lang_Class::set_module(k->java_mirror(), module()); 1248 } 1249 1250 int java_lang_Class::oop_size(oop java_class) { 1251 assert(_oop_size_offset != 0, "must be set"); 1252 int size = java_class->int_field(_oop_size_offset); 1253 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1254 return size; 1255 } 1256 1257 void java_lang_Class::set_oop_size(oop java_class, int size) { 1258 assert(_oop_size_offset != 0, "must be set"); 1259 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1260 java_class->int_field_put(_oop_size_offset, size); 1261 } 1262 1263 int java_lang_Class::static_oop_field_count(oop java_class) { 1264 assert(_static_oop_field_count_offset != 0, "must be set"); 1265 return java_class->int_field(_static_oop_field_count_offset); 1266 } 1267 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1268 assert(_static_oop_field_count_offset != 0, "must be set"); 1269 java_class->int_field_put(_static_oop_field_count_offset, size); 1270 } 1271 1272 oop java_lang_Class::protection_domain(oop java_class) { 1273 assert(_protection_domain_offset != 0, "must be set"); 1274 return java_class->obj_field(_protection_domain_offset); 1275 } 1276 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1277 assert(_protection_domain_offset != 0, "must be set"); 1278 java_class->obj_field_put(_protection_domain_offset, pd); 1279 } 1280 1281 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1282 assert(_component_mirror_offset != 0, "must be set"); 1283 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1284 } 1285 oop java_lang_Class::component_mirror(oop java_class) { 1286 assert(_component_mirror_offset != 0, "must be set"); 1287 return java_class->obj_field(_component_mirror_offset); 1288 } 1289 1290 oop java_lang_Class::init_lock(oop java_class) { 1291 assert(_init_lock_offset != 0, "must be set"); 1292 return java_class->obj_field(_init_lock_offset); 1293 } 1294 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1295 assert(_init_lock_offset != 0, "must be set"); 1296 java_class->obj_field_put(_init_lock_offset, init_lock); 1297 } 1298 1299 objArrayOop java_lang_Class::signers(oop java_class) { 1300 assert(_signers_offset != 0, "must be set"); 1301 return (objArrayOop)java_class->obj_field(_signers_offset); 1302 } 1303 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1304 assert(_signers_offset != 0, "must be set"); 1305 java_class->obj_field_put(_signers_offset, (oop)signers); 1306 } 1307 1308 1309 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1310 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1311 if (_class_loader_offset != 0) { 1312 java_class->obj_field_put(_class_loader_offset, loader); 1313 } 1314 } 1315 1316 oop java_lang_Class::class_loader(oop java_class) { 1317 assert(_class_loader_offset != 0, "must be set"); 1318 return java_class->obj_field(_class_loader_offset); 1319 } 1320 1321 oop java_lang_Class::module(oop java_class) { 1322 assert(_module_offset != 0, "must be set"); 1323 return java_class->obj_field(_module_offset); 1324 } 1325 1326 void java_lang_Class::set_module(oop java_class, oop module) { 1327 assert(_module_offset != 0, "must be set"); 1328 java_class->obj_field_put(_module_offset, module); 1329 } 1330 1331 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1332 // This should be improved by adding a field at the Java level or by 1333 // introducing a new VM klass (see comment in ClassFileParser) 1334 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1335 if (type != T_VOID) { 1336 Klass* aklass = Universe::typeArrayKlassObj(type); 1337 assert(aklass != NULL, "correct bootstrap"); 1338 release_set_array_klass(java_class, aklass); 1339 } 1340 #ifdef ASSERT 1341 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1342 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1343 #endif 1344 return java_class; 1345 } 1346 1347 1348 Klass* java_lang_Class::as_Klass(oop java_class) { 1349 //%note memory_2 1350 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1351 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1352 assert(k == NULL || k->is_klass(), "type check"); 1353 return k; 1354 } 1355 1356 1357 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1358 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1359 java_class->metadata_field_put(_klass_offset, klass); 1360 } 1361 1362 1363 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1364 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1365 Symbol* name = NULL; 1366 bool is_instance = false; 1367 if (is_primitive(java_class)) { 1368 name = vmSymbols::type_signature(primitive_type(java_class)); 1369 } else { 1370 Klass* k = as_Klass(java_class); 1371 is_instance = k->is_instance_klass(); 1372 name = k->name(); 1373 } 1374 if (name == NULL) { 1375 st->print("<null>"); 1376 return; 1377 } 1378 if (is_instance) st->print("L"); 1379 st->write((char*) name->base(), (int) name->utf8_length()); 1380 if (is_instance) st->print(";"); 1381 } 1382 1383 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1384 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1385 Symbol* name; 1386 if (is_primitive(java_class)) { 1387 name = vmSymbols::type_signature(primitive_type(java_class)); 1388 // Because this can create a new symbol, the caller has to decrement 1389 // the refcount, so make adjustment here and below for symbols returned 1390 // that are not created or incremented due to a successful lookup. 1391 name->increment_refcount(); 1392 } else { 1393 Klass* k = as_Klass(java_class); 1394 if (!k->is_instance_klass()) { 1395 name = k->name(); 1396 name->increment_refcount(); 1397 } else { 1398 ResourceMark rm; 1399 const char* sigstr = k->signature_name(); 1400 int siglen = (int) strlen(sigstr); 1401 if (!intern_if_not_found) { 1402 name = SymbolTable::probe(sigstr, siglen); 1403 } else { 1404 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1405 } 1406 } 1407 } 1408 return name; 1409 } 1410 1411 // Returns the Java name for this Java mirror (Resource allocated) 1412 // See Klass::external_name(). 1413 // For primitive type Java mirrors, its type name is returned. 1414 const char* java_lang_Class::as_external_name(oop java_class) { 1415 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1416 const char* name = NULL; 1417 if (is_primitive(java_class)) { 1418 name = type2name(primitive_type(java_class)); 1419 } else { 1420 name = as_Klass(java_class)->external_name(); 1421 } 1422 if (name == NULL) { 1423 name = "<null>"; 1424 } 1425 return name; 1426 } 1427 1428 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1429 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1430 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1431 return k; 1432 } 1433 1434 1435 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1436 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1437 java_class->release_metadata_field_put(_array_klass_offset, klass); 1438 } 1439 1440 1441 bool java_lang_Class::is_primitive(oop java_class) { 1442 // should assert: 1443 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1444 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1445 1446 #ifdef ASSERT 1447 if (is_primitive) { 1448 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1449 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1450 "Should be either the T_VOID primitive or a java primitive"); 1451 } 1452 #endif 1453 1454 return is_primitive; 1455 } 1456 1457 1458 BasicType java_lang_Class::primitive_type(oop java_class) { 1459 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1460 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1461 BasicType type = T_VOID; 1462 if (ak != NULL) { 1463 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1464 type = ArrayKlass::cast(ak)->element_type(); 1465 } else { 1466 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1467 } 1468 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1469 return type; 1470 } 1471 1472 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1473 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1474 if (is_primitive(java_class)) { 1475 if (reference_klass != NULL) 1476 (*reference_klass) = NULL; 1477 return primitive_type(java_class); 1478 } else { 1479 if (reference_klass != NULL) 1480 (*reference_klass) = as_Klass(java_class); 1481 return T_OBJECT; 1482 } 1483 } 1484 1485 1486 oop java_lang_Class::primitive_mirror(BasicType t) { 1487 oop mirror = Universe::java_mirror(t); 1488 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1489 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1490 return mirror; 1491 } 1492 1493 bool java_lang_Class::offsets_computed = false; 1494 int java_lang_Class::classRedefinedCount_offset = -1; 1495 1496 #define CLASS_FIELDS_DO(macro) \ 1497 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1498 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1499 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1500 macro(_module_offset, k, "module", module_signature, false) 1501 1502 void java_lang_Class::compute_offsets() { 1503 if (offsets_computed) { 1504 return; 1505 } 1506 1507 offsets_computed = true; 1508 1509 InstanceKlass* k = SystemDictionary::Class_klass(); 1510 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1511 1512 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1513 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1514 // GC treats them the same. 1515 _init_lock_offset = _component_mirror_offset; 1516 1517 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1518 } 1519 1520 #if INCLUDE_CDS 1521 void java_lang_Class::serialize(SerializeClosure* f) { 1522 f->do_u4((u4*)&offsets_computed); 1523 f->do_u4((u4*)&_init_lock_offset); 1524 1525 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1526 1527 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1528 } 1529 #endif 1530 1531 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1532 if (classRedefinedCount_offset == -1) { 1533 // If we don't have an offset for it then just return -1 as a marker. 1534 return -1; 1535 } 1536 1537 return the_class_mirror->int_field(classRedefinedCount_offset); 1538 } 1539 1540 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1541 if (classRedefinedCount_offset == -1) { 1542 // If we don't have an offset for it then nothing to set. 1543 return; 1544 } 1545 1546 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1547 } 1548 1549 1550 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1551 // platform thread structure, and a eetop offset which was used for thread 1552 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1553 // merged, so in the HotSpot VM we just use the eetop field for the thread 1554 // instead of the privateInfo_offset. 1555 // 1556 // Note: The stackSize field is only present starting in 1.4. 1557 1558 int java_lang_Thread::_name_offset = 0; 1559 int java_lang_Thread::_group_offset = 0; 1560 int java_lang_Thread::_contextClassLoader_offset = 0; 1561 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1562 int java_lang_Thread::_priority_offset = 0; 1563 int java_lang_Thread::_eetop_offset = 0; 1564 int java_lang_Thread::_daemon_offset = 0; 1565 int java_lang_Thread::_stillborn_offset = 0; 1566 int java_lang_Thread::_stackSize_offset = 0; 1567 int java_lang_Thread::_tid_offset = 0; 1568 int java_lang_Thread::_thread_status_offset = 0; 1569 int java_lang_Thread::_park_blocker_offset = 0; 1570 int java_lang_Thread::_park_event_offset = 0 ; 1571 1572 #define THREAD_FIELDS_DO(macro) \ 1573 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1574 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1575 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1576 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1577 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1578 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1579 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1580 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1581 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1582 macro(_tid_offset, k, "tid", long_signature, false); \ 1583 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1584 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1585 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1586 1587 void java_lang_Thread::compute_offsets() { 1588 assert(_group_offset == 0, "offsets should be initialized only once"); 1589 1590 InstanceKlass* k = SystemDictionary::Thread_klass(); 1591 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1592 } 1593 1594 #if INCLUDE_CDS 1595 void java_lang_Thread::serialize(SerializeClosure* f) { 1596 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1597 } 1598 #endif 1599 1600 JavaThread* java_lang_Thread::thread(oop java_thread) { 1601 return (JavaThread*)java_thread->address_field(_eetop_offset); 1602 } 1603 1604 1605 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1606 java_thread->address_field_put(_eetop_offset, (address)thread); 1607 } 1608 1609 1610 oop java_lang_Thread::name(oop java_thread) { 1611 return java_thread->obj_field(_name_offset); 1612 } 1613 1614 1615 void java_lang_Thread::set_name(oop java_thread, oop name) { 1616 java_thread->obj_field_put(_name_offset, name); 1617 } 1618 1619 1620 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1621 return (ThreadPriority)java_thread->int_field(_priority_offset); 1622 } 1623 1624 1625 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1626 java_thread->int_field_put(_priority_offset, priority); 1627 } 1628 1629 1630 oop java_lang_Thread::threadGroup(oop java_thread) { 1631 return java_thread->obj_field(_group_offset); 1632 } 1633 1634 1635 bool java_lang_Thread::is_stillborn(oop java_thread) { 1636 return java_thread->bool_field(_stillborn_offset) != 0; 1637 } 1638 1639 1640 // We never have reason to turn the stillborn bit off 1641 void java_lang_Thread::set_stillborn(oop java_thread) { 1642 java_thread->bool_field_put(_stillborn_offset, true); 1643 } 1644 1645 1646 bool java_lang_Thread::is_alive(oop java_thread) { 1647 JavaThread* thr = java_lang_Thread::thread(java_thread); 1648 return (thr != NULL); 1649 } 1650 1651 1652 bool java_lang_Thread::is_daemon(oop java_thread) { 1653 return java_thread->bool_field(_daemon_offset) != 0; 1654 } 1655 1656 1657 void java_lang_Thread::set_daemon(oop java_thread) { 1658 java_thread->bool_field_put(_daemon_offset, true); 1659 } 1660 1661 oop java_lang_Thread::context_class_loader(oop java_thread) { 1662 return java_thread->obj_field(_contextClassLoader_offset); 1663 } 1664 1665 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1666 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1667 } 1668 1669 1670 jlong java_lang_Thread::stackSize(oop java_thread) { 1671 if (_stackSize_offset > 0) { 1672 return java_thread->long_field(_stackSize_offset); 1673 } else { 1674 return 0; 1675 } 1676 } 1677 1678 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1679 void java_lang_Thread::set_thread_status(oop java_thread, 1680 java_lang_Thread::ThreadStatus status) { 1681 // The threadStatus is only present starting in 1.5 1682 if (_thread_status_offset > 0) { 1683 java_thread->int_field_put(_thread_status_offset, status); 1684 } 1685 } 1686 1687 // Read thread status value from threadStatus field in java.lang.Thread java class. 1688 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1689 // Make sure the caller is operating on behalf of the VM or is 1690 // running VM code (state == _thread_in_vm). 1691 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1692 JavaThread::current()->thread_state() == _thread_in_vm, 1693 "Java Thread is not running in vm"); 1694 // The threadStatus is only present starting in 1.5 1695 if (_thread_status_offset > 0) { 1696 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1697 } else { 1698 // All we can easily figure out is if it is alive, but that is 1699 // enough info for a valid unknown status. 1700 // These aren't restricted to valid set ThreadStatus values, so 1701 // use JVMTI values and cast. 1702 JavaThread* thr = java_lang_Thread::thread(java_thread); 1703 if (thr == NULL) { 1704 // the thread hasn't run yet or is in the process of exiting 1705 return NEW; 1706 } 1707 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1708 } 1709 } 1710 1711 1712 jlong java_lang_Thread::thread_id(oop java_thread) { 1713 // The thread ID field is only present starting in 1.5 1714 if (_tid_offset > 0) { 1715 return java_thread->long_field(_tid_offset); 1716 } else { 1717 return 0; 1718 } 1719 } 1720 1721 oop java_lang_Thread::park_blocker(oop java_thread) { 1722 assert(JDK_Version::current().supports_thread_park_blocker() && 1723 _park_blocker_offset != 0, "Must support parkBlocker field"); 1724 1725 if (_park_blocker_offset > 0) { 1726 return java_thread->obj_field(_park_blocker_offset); 1727 } 1728 1729 return NULL; 1730 } 1731 1732 jlong java_lang_Thread::park_event(oop java_thread) { 1733 if (_park_event_offset > 0) { 1734 return java_thread->long_field(_park_event_offset); 1735 } 1736 return 0; 1737 } 1738 1739 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1740 if (_park_event_offset > 0) { 1741 java_thread->long_field_put(_park_event_offset, ptr); 1742 return true; 1743 } 1744 return false; 1745 } 1746 1747 1748 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1749 assert(_thread_status_offset != 0, "Must have thread status"); 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(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(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, THREAD); 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): _methods(NULL), _bcis(NULL), _head(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 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 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 // Fill in class name 2547 ResourceMark rm(THREAD); 2548 const char* str = holder->external_name(); 2549 oop classname = StringTable::intern((char*) str, CHECK); 2550 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2551 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2552 2553 oop loader = holder->class_loader(); 2554 if (loader != NULL) { 2555 oop loader_name = java_lang_ClassLoader::name(loader); 2556 if (loader_name != NULL) 2557 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2558 } 2559 2560 // Fill in method name 2561 oop methodname = StringTable::intern(name, CHECK); 2562 java_lang_StackTraceElement::set_methodName(element(), methodname); 2563 2564 // Fill in module name and version 2565 ModuleEntry* module = holder->module(); 2566 if (module->is_named()) { 2567 oop module_name = StringTable::intern(module->name(), CHECK); 2568 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2569 oop module_version; 2570 if (module->version() != NULL) { 2571 module_version = StringTable::intern(module->version(), CHECK); 2572 } else { 2573 module_version = NULL; 2574 } 2575 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2576 } 2577 2578 if (method() == NULL || !version_matches(method(), version)) { 2579 // The method was redefined, accurate line number information isn't available 2580 java_lang_StackTraceElement::set_fileName(element(), NULL); 2581 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2582 } else { 2583 // Fill in source file name and line number. 2584 Symbol* source = Backtrace::get_source_file_name(holder, version); 2585 if (ShowHiddenFrames && source == NULL) 2586 source = vmSymbols::unknown_class_name(); 2587 oop filename = StringTable::intern(source, CHECK); 2588 java_lang_StackTraceElement::set_fileName(element(), filename); 2589 2590 int line_number = Backtrace::get_line_number(method, bci); 2591 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2592 } 2593 } 2594 2595 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2596 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2597 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2598 // we should expand MemberName::name when Throwable uses StackTrace 2599 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2600 return method; 2601 } 2602 2603 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2604 // set Method* or mid/cpref 2605 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2606 InstanceKlass* ik = method->method_holder(); 2607 CallInfo info(method(), ik, CHECK); 2608 MethodHandles::init_method_MemberName(mname, info); 2609 // set bci 2610 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2611 // method may be redefined; store the version 2612 int version = method->constants()->version(); 2613 assert((jushort)version == version, "version should be short"); 2614 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2615 } 2616 2617 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2618 ResourceMark rm(THREAD); 2619 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2620 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2621 InstanceKlass* holder = InstanceKlass::cast(clazz); 2622 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2623 2624 short version = stackFrame->short_field(_version_offset); 2625 short bci = stackFrame->short_field(_bci_offset); 2626 Symbol* name = method->name(); 2627 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2628 } 2629 2630 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2631 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2632 macro(_bci_offset, k, "bci", short_signature, false) 2633 2634 void java_lang_StackFrameInfo::compute_offsets() { 2635 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2636 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2637 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2638 } 2639 2640 #if INCLUDE_CDS 2641 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) { 2642 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2643 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2644 } 2645 #endif 2646 2647 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2648 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2649 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2650 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2651 macro(_mode_offset, k, "mode", int_signature, false) 2652 2653 void java_lang_LiveStackFrameInfo::compute_offsets() { 2654 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2655 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2656 } 2657 2658 #if INCLUDE_CDS 2659 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) { 2660 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2661 } 2662 #endif 2663 2664 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2665 macro(override_offset, k, "override", bool_signature, false) 2666 2667 void java_lang_reflect_AccessibleObject::compute_offsets() { 2668 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2669 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2670 } 2671 2672 #if INCLUDE_CDS 2673 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) { 2674 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2675 } 2676 #endif 2677 2678 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2680 return (jboolean) reflect->bool_field(override_offset); 2681 } 2682 2683 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2685 reflect->bool_field_put(override_offset, (int) value); 2686 } 2687 2688 #define METHOD_FIELDS_DO(macro) \ 2689 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2690 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2691 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2692 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2693 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2694 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2695 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2696 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2697 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2698 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2699 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2700 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2701 2702 void java_lang_reflect_Method::compute_offsets() { 2703 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2704 // The generic signature and annotations fields are only present in 1.5 2705 signature_offset = -1; 2706 annotations_offset = -1; 2707 parameter_annotations_offset = -1; 2708 annotation_default_offset = -1; 2709 type_annotations_offset = -1; 2710 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2711 } 2712 2713 #if INCLUDE_CDS 2714 void java_lang_reflect_Method::serialize(SerializeClosure* f) { 2715 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2716 } 2717 #endif 2718 2719 Handle java_lang_reflect_Method::create(TRAPS) { 2720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2721 Klass* klass = SystemDictionary::reflect_Method_klass(); 2722 // This class is eagerly initialized during VM initialization, since we keep a refence 2723 // to one of the methods 2724 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2725 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2726 } 2727 2728 oop java_lang_reflect_Method::clazz(oop reflect) { 2729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2730 return reflect->obj_field(clazz_offset); 2731 } 2732 2733 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2735 reflect->obj_field_put(clazz_offset, value); 2736 } 2737 2738 int java_lang_reflect_Method::slot(oop reflect) { 2739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2740 return reflect->int_field(slot_offset); 2741 } 2742 2743 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2745 reflect->int_field_put(slot_offset, value); 2746 } 2747 2748 oop java_lang_reflect_Method::name(oop method) { 2749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2750 return method->obj_field(name_offset); 2751 } 2752 2753 void java_lang_reflect_Method::set_name(oop method, oop value) { 2754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2755 method->obj_field_put(name_offset, value); 2756 } 2757 2758 oop java_lang_reflect_Method::return_type(oop method) { 2759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2760 return method->obj_field(returnType_offset); 2761 } 2762 2763 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2765 method->obj_field_put(returnType_offset, value); 2766 } 2767 2768 oop java_lang_reflect_Method::parameter_types(oop method) { 2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2770 return method->obj_field(parameterTypes_offset); 2771 } 2772 2773 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2775 method->obj_field_put(parameterTypes_offset, value); 2776 } 2777 2778 oop java_lang_reflect_Method::exception_types(oop method) { 2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2780 return method->obj_field(exceptionTypes_offset); 2781 } 2782 2783 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2785 method->obj_field_put(exceptionTypes_offset, value); 2786 } 2787 2788 int java_lang_reflect_Method::modifiers(oop method) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 return method->int_field(modifiers_offset); 2791 } 2792 2793 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 method->int_field_put(modifiers_offset, value); 2796 } 2797 2798 bool java_lang_reflect_Method::has_signature_field() { 2799 return (signature_offset >= 0); 2800 } 2801 2802 oop java_lang_reflect_Method::signature(oop method) { 2803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2804 assert(has_signature_field(), "signature field must be present"); 2805 return method->obj_field(signature_offset); 2806 } 2807 2808 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2810 assert(has_signature_field(), "signature field must be present"); 2811 method->obj_field_put(signature_offset, value); 2812 } 2813 2814 bool java_lang_reflect_Method::has_annotations_field() { 2815 return (annotations_offset >= 0); 2816 } 2817 2818 oop java_lang_reflect_Method::annotations(oop method) { 2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2820 assert(has_annotations_field(), "annotations field must be present"); 2821 return method->obj_field(annotations_offset); 2822 } 2823 2824 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2826 assert(has_annotations_field(), "annotations field must be present"); 2827 method->obj_field_put(annotations_offset, value); 2828 } 2829 2830 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2831 return (parameter_annotations_offset >= 0); 2832 } 2833 2834 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2836 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2837 return method->obj_field(parameter_annotations_offset); 2838 } 2839 2840 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2842 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2843 method->obj_field_put(parameter_annotations_offset, value); 2844 } 2845 2846 bool java_lang_reflect_Method::has_annotation_default_field() { 2847 return (annotation_default_offset >= 0); 2848 } 2849 2850 oop java_lang_reflect_Method::annotation_default(oop method) { 2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2852 assert(has_annotation_default_field(), "annotation default field must be present"); 2853 return method->obj_field(annotation_default_offset); 2854 } 2855 2856 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 assert(has_annotation_default_field(), "annotation default field must be present"); 2859 method->obj_field_put(annotation_default_offset, value); 2860 } 2861 2862 bool java_lang_reflect_Method::has_type_annotations_field() { 2863 return (type_annotations_offset >= 0); 2864 } 2865 2866 oop java_lang_reflect_Method::type_annotations(oop method) { 2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2868 assert(has_type_annotations_field(), "type_annotations field must be present"); 2869 return method->obj_field(type_annotations_offset); 2870 } 2871 2872 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2873 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2874 assert(has_type_annotations_field(), "type_annotations field must be present"); 2875 method->obj_field_put(type_annotations_offset, value); 2876 } 2877 2878 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2879 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2880 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2881 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2882 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2883 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2884 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2885 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2886 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2887 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2888 2889 2890 void java_lang_reflect_Constructor::compute_offsets() { 2891 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2892 // The generic signature and annotations fields are only present in 1.5 2893 signature_offset = -1; 2894 annotations_offset = -1; 2895 parameter_annotations_offset = -1; 2896 type_annotations_offset = -1; 2897 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2898 } 2899 2900 #if INCLUDE_CDS 2901 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) { 2902 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2903 } 2904 #endif 2905 2906 Handle java_lang_reflect_Constructor::create(TRAPS) { 2907 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2908 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2909 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2910 InstanceKlass* ik = InstanceKlass::cast(k); 2911 // Ensure it is initialized 2912 ik->initialize(CHECK_NH); 2913 return ik->allocate_instance_handle(THREAD); 2914 } 2915 2916 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2918 return reflect->obj_field(clazz_offset); 2919 } 2920 2921 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2923 reflect->obj_field_put(clazz_offset, value); 2924 } 2925 2926 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2928 return constructor->obj_field(parameterTypes_offset); 2929 } 2930 2931 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2932 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2933 constructor->obj_field_put(parameterTypes_offset, value); 2934 } 2935 2936 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2938 return constructor->obj_field(exceptionTypes_offset); 2939 } 2940 2941 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2943 constructor->obj_field_put(exceptionTypes_offset, value); 2944 } 2945 2946 int java_lang_reflect_Constructor::slot(oop reflect) { 2947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2948 return reflect->int_field(slot_offset); 2949 } 2950 2951 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2953 reflect->int_field_put(slot_offset, value); 2954 } 2955 2956 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2958 return constructor->int_field(modifiers_offset); 2959 } 2960 2961 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2963 constructor->int_field_put(modifiers_offset, value); 2964 } 2965 2966 bool java_lang_reflect_Constructor::has_signature_field() { 2967 return (signature_offset >= 0); 2968 } 2969 2970 oop java_lang_reflect_Constructor::signature(oop constructor) { 2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2972 assert(has_signature_field(), "signature field must be present"); 2973 return constructor->obj_field(signature_offset); 2974 } 2975 2976 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2978 assert(has_signature_field(), "signature field must be present"); 2979 constructor->obj_field_put(signature_offset, value); 2980 } 2981 2982 bool java_lang_reflect_Constructor::has_annotations_field() { 2983 return (annotations_offset >= 0); 2984 } 2985 2986 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2988 assert(has_annotations_field(), "annotations field must be present"); 2989 return constructor->obj_field(annotations_offset); 2990 } 2991 2992 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2994 assert(has_annotations_field(), "annotations field must be present"); 2995 constructor->obj_field_put(annotations_offset, value); 2996 } 2997 2998 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2999 return (parameter_annotations_offset >= 0); 3000 } 3001 3002 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3004 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3005 return method->obj_field(parameter_annotations_offset); 3006 } 3007 3008 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3010 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3011 method->obj_field_put(parameter_annotations_offset, value); 3012 } 3013 3014 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3015 return (type_annotations_offset >= 0); 3016 } 3017 3018 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3020 assert(has_type_annotations_field(), "type_annotations field must be present"); 3021 return constructor->obj_field(type_annotations_offset); 3022 } 3023 3024 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3026 assert(has_type_annotations_field(), "type_annotations field must be present"); 3027 constructor->obj_field_put(type_annotations_offset, value); 3028 } 3029 3030 #define FIELD_FIELDS_DO(macro) \ 3031 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3032 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3033 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3034 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3035 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3036 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3037 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3038 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3039 3040 void java_lang_reflect_Field::compute_offsets() { 3041 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3042 // The generic signature and annotations fields are only present in 1.5 3043 signature_offset = -1; 3044 annotations_offset = -1; 3045 type_annotations_offset = -1; 3046 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3047 } 3048 3049 #if INCLUDE_CDS 3050 void java_lang_reflect_Field::serialize(SerializeClosure* f) { 3051 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3052 } 3053 #endif 3054 3055 Handle java_lang_reflect_Field::create(TRAPS) { 3056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3057 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3058 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3059 InstanceKlass* ik = InstanceKlass::cast(k); 3060 // Ensure it is initialized 3061 ik->initialize(CHECK_NH); 3062 return ik->allocate_instance_handle(THREAD); 3063 } 3064 3065 oop java_lang_reflect_Field::clazz(oop reflect) { 3066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3067 return reflect->obj_field(clazz_offset); 3068 } 3069 3070 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3072 reflect->obj_field_put(clazz_offset, value); 3073 } 3074 3075 oop java_lang_reflect_Field::name(oop field) { 3076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3077 return field->obj_field(name_offset); 3078 } 3079 3080 void java_lang_reflect_Field::set_name(oop field, oop value) { 3081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3082 field->obj_field_put(name_offset, value); 3083 } 3084 3085 oop java_lang_reflect_Field::type(oop field) { 3086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3087 return field->obj_field(type_offset); 3088 } 3089 3090 void java_lang_reflect_Field::set_type(oop field, oop value) { 3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3092 field->obj_field_put(type_offset, value); 3093 } 3094 3095 int java_lang_reflect_Field::slot(oop reflect) { 3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3097 return reflect->int_field(slot_offset); 3098 } 3099 3100 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3102 reflect->int_field_put(slot_offset, value); 3103 } 3104 3105 int java_lang_reflect_Field::modifiers(oop field) { 3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3107 return field->int_field(modifiers_offset); 3108 } 3109 3110 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3112 field->int_field_put(modifiers_offset, value); 3113 } 3114 3115 bool java_lang_reflect_Field::has_signature_field() { 3116 return (signature_offset >= 0); 3117 } 3118 3119 oop java_lang_reflect_Field::signature(oop field) { 3120 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3121 assert(has_signature_field(), "signature field must be present"); 3122 return field->obj_field(signature_offset); 3123 } 3124 3125 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3127 assert(has_signature_field(), "signature field must be present"); 3128 field->obj_field_put(signature_offset, value); 3129 } 3130 3131 bool java_lang_reflect_Field::has_annotations_field() { 3132 return (annotations_offset >= 0); 3133 } 3134 3135 oop java_lang_reflect_Field::annotations(oop field) { 3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3137 assert(has_annotations_field(), "annotations field must be present"); 3138 return field->obj_field(annotations_offset); 3139 } 3140 3141 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3143 assert(has_annotations_field(), "annotations field must be present"); 3144 field->obj_field_put(annotations_offset, value); 3145 } 3146 3147 bool java_lang_reflect_Field::has_type_annotations_field() { 3148 return (type_annotations_offset >= 0); 3149 } 3150 3151 oop java_lang_reflect_Field::type_annotations(oop field) { 3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3153 assert(has_type_annotations_field(), "type_annotations field must be present"); 3154 return field->obj_field(type_annotations_offset); 3155 } 3156 3157 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3159 assert(has_type_annotations_field(), "type_annotations field must be present"); 3160 field->obj_field_put(type_annotations_offset, value); 3161 } 3162 3163 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3164 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3165 3166 void reflect_ConstantPool::compute_offsets() { 3167 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3168 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3169 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3170 } 3171 3172 #if INCLUDE_CDS 3173 void reflect_ConstantPool::serialize(SerializeClosure* f) { 3174 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3175 } 3176 #endif 3177 3178 #define PARAMETER_FIELDS_DO(macro) \ 3179 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3180 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3181 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3182 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3183 3184 void java_lang_reflect_Parameter::compute_offsets() { 3185 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3186 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3187 } 3188 3189 #if INCLUDE_CDS 3190 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) { 3191 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3192 } 3193 #endif 3194 3195 Handle java_lang_reflect_Parameter::create(TRAPS) { 3196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3197 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3198 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3199 InstanceKlass* ik = InstanceKlass::cast(k); 3200 // Ensure it is initialized 3201 ik->initialize(CHECK_NH); 3202 return ik->allocate_instance_handle(THREAD); 3203 } 3204 3205 oop java_lang_reflect_Parameter::name(oop param) { 3206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3207 return param->obj_field(name_offset); 3208 } 3209 3210 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3212 param->obj_field_put(name_offset, value); 3213 } 3214 3215 int java_lang_reflect_Parameter::modifiers(oop param) { 3216 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3217 return param->int_field(modifiers_offset); 3218 } 3219 3220 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3222 param->int_field_put(modifiers_offset, value); 3223 } 3224 3225 int java_lang_reflect_Parameter::index(oop param) { 3226 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3227 return param->int_field(index_offset); 3228 } 3229 3230 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3231 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3232 param->int_field_put(index_offset, value); 3233 } 3234 3235 oop java_lang_reflect_Parameter::executable(oop param) { 3236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3237 return param->obj_field(executable_offset); 3238 } 3239 3240 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3242 param->obj_field_put(executable_offset, value); 3243 } 3244 3245 3246 int java_lang_Module::loader_offset; 3247 int java_lang_Module::name_offset; 3248 int java_lang_Module::_module_entry_offset = -1; 3249 3250 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3252 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3253 vmSymbols::java_lang_module_init_signature(), 3254 loader, module_name, CHECK_NH); 3255 } 3256 3257 #define MODULE_FIELDS_DO(macro) \ 3258 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3259 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3260 3261 void java_lang_Module::compute_offsets() { 3262 InstanceKlass* k = SystemDictionary::Module_klass(); 3263 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3264 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3265 } 3266 3267 #if INCLUDE_CDS 3268 void java_lang_Module::serialize(SerializeClosure* f) { 3269 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3270 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3271 } 3272 #endif 3273 3274 oop java_lang_Module::loader(oop module) { 3275 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3276 return module->obj_field(loader_offset); 3277 } 3278 3279 void java_lang_Module::set_loader(oop module, oop value) { 3280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3281 module->obj_field_put(loader_offset, value); 3282 } 3283 3284 oop java_lang_Module::name(oop module) { 3285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3286 return module->obj_field(name_offset); 3287 } 3288 3289 void java_lang_Module::set_name(oop module, oop value) { 3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3291 module->obj_field_put(name_offset, value); 3292 } 3293 3294 ModuleEntry* java_lang_Module::module_entry(oop module) { 3295 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3296 assert(module != NULL, "module can't be null"); 3297 assert(oopDesc::is_oop(module), "module must be oop"); 3298 3299 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3300 if (module_entry == NULL) { 3301 // If the inject field containing the ModuleEntry* is null then return the 3302 // class loader's unnamed module. 3303 oop loader = java_lang_Module::loader(module); 3304 Handle h_loader = Handle(Thread::current(), loader); 3305 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3306 return loader_cld->unnamed_module(); 3307 } 3308 return module_entry; 3309 } 3310 3311 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3312 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3313 assert(module != NULL, "module can't be null"); 3314 assert(oopDesc::is_oop(module), "module must be oop"); 3315 module->address_field_put(_module_entry_offset, (address)module_entry); 3316 } 3317 3318 Handle reflect_ConstantPool::create(TRAPS) { 3319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3320 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3321 // Ensure it is initialized 3322 k->initialize(CHECK_NH); 3323 return k->allocate_instance_handle(THREAD); 3324 } 3325 3326 3327 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3329 oop mirror = value->pool_holder()->java_mirror(); 3330 // Save the mirror to get back the constant pool. 3331 reflect->obj_field_put(_oop_offset, mirror); 3332 } 3333 3334 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3336 3337 oop mirror = reflect->obj_field(_oop_offset); 3338 Klass* k = java_lang_Class::as_Klass(mirror); 3339 assert(k->is_instance_klass(), "Must be"); 3340 3341 // Get the constant pool back from the klass. Since class redefinition 3342 // merges the new constant pool into the old, this is essentially the 3343 // same constant pool as the original. If constant pool merging is 3344 // no longer done in the future, this will have to change to save 3345 // the original. 3346 return InstanceKlass::cast(k)->constants(); 3347 } 3348 3349 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3350 macro(_base_offset, k, "base", object_signature, false) 3351 3352 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3353 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3354 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3355 } 3356 3357 #if INCLUDE_CDS 3358 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) { 3359 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3360 } 3361 #endif 3362 3363 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3364 Klass* k = SystemDictionary::box_klass(type); 3365 if (k == NULL) return NULL; 3366 InstanceKlass* ik = InstanceKlass::cast(k); 3367 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3368 return ik->allocate_instance(THREAD); 3369 } 3370 3371 3372 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3373 oop box = initialize_and_allocate(type, CHECK_0); 3374 if (box == NULL) return NULL; 3375 switch (type) { 3376 case T_BOOLEAN: 3377 box->bool_field_put(value_offset, value->z); 3378 break; 3379 case T_CHAR: 3380 box->char_field_put(value_offset, value->c); 3381 break; 3382 case T_FLOAT: 3383 box->float_field_put(value_offset, value->f); 3384 break; 3385 case T_DOUBLE: 3386 box->double_field_put(long_value_offset, value->d); 3387 break; 3388 case T_BYTE: 3389 box->byte_field_put(value_offset, value->b); 3390 break; 3391 case T_SHORT: 3392 box->short_field_put(value_offset, value->s); 3393 break; 3394 case T_INT: 3395 box->int_field_put(value_offset, value->i); 3396 break; 3397 case T_LONG: 3398 box->long_field_put(long_value_offset, value->j); 3399 break; 3400 default: 3401 return NULL; 3402 } 3403 return box; 3404 } 3405 3406 3407 BasicType java_lang_boxing_object::basic_type(oop box) { 3408 if (box == NULL) return T_ILLEGAL; 3409 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3410 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3411 return T_ILLEGAL; 3412 return type; 3413 } 3414 3415 3416 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3417 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3418 switch (type) { 3419 case T_BOOLEAN: 3420 value->z = box->bool_field(value_offset); 3421 break; 3422 case T_CHAR: 3423 value->c = box->char_field(value_offset); 3424 break; 3425 case T_FLOAT: 3426 value->f = box->float_field(value_offset); 3427 break; 3428 case T_DOUBLE: 3429 value->d = box->double_field(long_value_offset); 3430 break; 3431 case T_BYTE: 3432 value->b = box->byte_field(value_offset); 3433 break; 3434 case T_SHORT: 3435 value->s = box->short_field(value_offset); 3436 break; 3437 case T_INT: 3438 value->i = box->int_field(value_offset); 3439 break; 3440 case T_LONG: 3441 value->j = box->long_field(long_value_offset); 3442 break; 3443 default: 3444 return T_ILLEGAL; 3445 } // end switch 3446 return type; 3447 } 3448 3449 3450 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3451 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3452 switch (type) { 3453 case T_BOOLEAN: 3454 box->bool_field_put(value_offset, value->z); 3455 break; 3456 case T_CHAR: 3457 box->char_field_put(value_offset, value->c); 3458 break; 3459 case T_FLOAT: 3460 box->float_field_put(value_offset, value->f); 3461 break; 3462 case T_DOUBLE: 3463 box->double_field_put(long_value_offset, value->d); 3464 break; 3465 case T_BYTE: 3466 box->byte_field_put(value_offset, value->b); 3467 break; 3468 case T_SHORT: 3469 box->short_field_put(value_offset, value->s); 3470 break; 3471 case T_INT: 3472 box->int_field_put(value_offset, value->i); 3473 break; 3474 case T_LONG: 3475 box->long_field_put(long_value_offset, value->j); 3476 break; 3477 default: 3478 return T_ILLEGAL; 3479 } // end switch 3480 return type; 3481 } 3482 3483 3484 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3485 switch (type) { 3486 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3487 case T_CHAR: st->print("%d", value->c); break; 3488 case T_BYTE: st->print("%d", value->b); break; 3489 case T_SHORT: st->print("%d", value->s); break; 3490 case T_INT: st->print("%d", value->i); break; 3491 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3492 case T_FLOAT: st->print("%f", value->f); break; 3493 case T_DOUBLE: st->print("%lf", value->d); break; 3494 default: st->print("type %d?", type); break; 3495 } 3496 } 3497 3498 // Support for java_lang_ref_Reference 3499 3500 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3501 assert(obj != NULL, "sanity"); 3502 if (offset != java_lang_ref_Reference::referent_offset) { 3503 return false; 3504 } 3505 3506 Klass* k = obj->klass(); 3507 if (!k->is_instance_klass()) { 3508 return false; 3509 } 3510 3511 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3512 bool is_reference = ik->reference_type() != REF_NONE; 3513 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3514 return is_reference; 3515 } 3516 3517 // Support for java_lang_ref_SoftReference 3518 // 3519 3520 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3521 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3522 macro(static_clock_offset, k, "clock", long_signature, true) 3523 3524 void java_lang_ref_SoftReference::compute_offsets() { 3525 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3526 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3527 } 3528 3529 #if INCLUDE_CDS 3530 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) { 3531 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3532 } 3533 #endif 3534 3535 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3536 return ref->long_field(timestamp_offset); 3537 } 3538 3539 jlong java_lang_ref_SoftReference::clock() { 3540 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3541 oop base = ik->static_field_base_raw(); 3542 return base->long_field(static_clock_offset); 3543 } 3544 3545 void java_lang_ref_SoftReference::set_clock(jlong value) { 3546 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3547 oop base = ik->static_field_base_raw(); 3548 base->long_field_put(static_clock_offset, value); 3549 } 3550 3551 // Support for java_lang_invoke_DirectMethodHandle 3552 3553 int java_lang_invoke_DirectMethodHandle::_member_offset; 3554 3555 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3556 oop member_name = NULL; 3557 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3558 "a DirectMethodHandle oop is expected"); 3559 return dmh->obj_field(member_offset_in_bytes()); 3560 } 3561 3562 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3563 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3564 3565 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3566 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3567 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3568 } 3569 3570 #if INCLUDE_CDS 3571 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) { 3572 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3573 } 3574 #endif 3575 3576 // Support for java_lang_invoke_MethodHandle 3577 3578 int java_lang_invoke_MethodHandle::_type_offset; 3579 int java_lang_invoke_MethodHandle::_form_offset; 3580 3581 int java_lang_invoke_MemberName::_clazz_offset; 3582 int java_lang_invoke_MemberName::_name_offset; 3583 int java_lang_invoke_MemberName::_type_offset; 3584 int java_lang_invoke_MemberName::_flags_offset; 3585 int java_lang_invoke_MemberName::_method_offset; 3586 int java_lang_invoke_MemberName::_vmindex_offset; 3587 3588 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3589 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3590 3591 int java_lang_invoke_LambdaForm::_vmentry_offset; 3592 3593 #define METHODHANDLE_FIELDS_DO(macro) \ 3594 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3595 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3596 3597 void java_lang_invoke_MethodHandle::compute_offsets() { 3598 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3599 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3600 } 3601 3602 #if INCLUDE_CDS 3603 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) { 3604 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3605 } 3606 #endif 3607 3608 #define MEMBERNAME_FIELDS_DO(macro) \ 3609 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3610 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3611 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3612 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3613 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3614 3615 void java_lang_invoke_MemberName::compute_offsets() { 3616 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3617 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3618 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3619 } 3620 3621 #if INCLUDE_CDS 3622 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) { 3623 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3624 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3625 } 3626 #endif 3627 3628 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3629 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3630 assert(k != NULL, "jdk mismatch"); 3631 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3632 } 3633 3634 #if INCLUDE_CDS 3635 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) { 3636 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3637 } 3638 #endif 3639 3640 #define LAMBDAFORM_FIELDS_DO(macro) \ 3641 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3642 3643 void java_lang_invoke_LambdaForm::compute_offsets() { 3644 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3645 assert (k != NULL, "jdk mismatch"); 3646 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3647 } 3648 3649 #if INCLUDE_CDS 3650 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) { 3651 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3652 } 3653 #endif 3654 3655 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3656 return obj != NULL && is_subclass(obj->klass()); 3657 } 3658 3659 3660 oop java_lang_invoke_MethodHandle::type(oop mh) { 3661 return mh->obj_field(_type_offset); 3662 } 3663 3664 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3665 mh->obj_field_put(_type_offset, mtype); 3666 } 3667 3668 oop java_lang_invoke_MethodHandle::form(oop mh) { 3669 assert(_form_offset != 0, ""); 3670 return mh->obj_field(_form_offset); 3671 } 3672 3673 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3674 assert(_form_offset != 0, ""); 3675 mh->obj_field_put(_form_offset, lform); 3676 } 3677 3678 /// MemberName accessors 3679 3680 oop java_lang_invoke_MemberName::clazz(oop mname) { 3681 assert(is_instance(mname), "wrong type"); 3682 return mname->obj_field(_clazz_offset); 3683 } 3684 3685 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3686 assert(is_instance(mname), "wrong type"); 3687 mname->obj_field_put(_clazz_offset, clazz); 3688 } 3689 3690 oop java_lang_invoke_MemberName::name(oop mname) { 3691 assert(is_instance(mname), "wrong type"); 3692 return mname->obj_field(_name_offset); 3693 } 3694 3695 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3696 assert(is_instance(mname), "wrong type"); 3697 mname->obj_field_put(_name_offset, name); 3698 } 3699 3700 oop java_lang_invoke_MemberName::type(oop mname) { 3701 assert(is_instance(mname), "wrong type"); 3702 return mname->obj_field(_type_offset); 3703 } 3704 3705 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3706 assert(is_instance(mname), "wrong type"); 3707 mname->obj_field_put(_type_offset, type); 3708 } 3709 3710 int java_lang_invoke_MemberName::flags(oop mname) { 3711 assert(is_instance(mname), "wrong type"); 3712 return mname->int_field(_flags_offset); 3713 } 3714 3715 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3716 assert(is_instance(mname), "wrong type"); 3717 mname->int_field_put(_flags_offset, flags); 3718 } 3719 3720 3721 // Return vmtarget from ResolvedMethodName method field through indirection 3722 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3723 assert(is_instance(mname), "wrong type"); 3724 oop method = mname->obj_field(_method_offset); 3725 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3726 } 3727 3728 bool java_lang_invoke_MemberName::is_method(oop mname) { 3729 assert(is_instance(mname), "must be MemberName"); 3730 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3731 } 3732 3733 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3734 assert(is_instance(mname), "wrong type"); 3735 mname->obj_field_put(_method_offset, resolved_method); 3736 } 3737 3738 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3739 assert(is_instance(mname), "wrong type"); 3740 return (intptr_t) mname->address_field(_vmindex_offset); 3741 } 3742 3743 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3744 assert(is_instance(mname), "wrong type"); 3745 mname->address_field_put(_vmindex_offset, (address) index); 3746 } 3747 3748 3749 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3750 assert(is_instance(resolved_method), "wrong type"); 3751 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3752 assert(m->is_method(), "must be"); 3753 return m; 3754 } 3755 3756 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3757 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3758 assert(is_instance(resolved_method), "wrong type"); 3759 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3760 } 3761 3762 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3763 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3764 oop resolved_method = ResolvedMethodTable::find_method(m()); 3765 if (resolved_method == NULL) { 3766 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3767 if (!k->is_initialized()) { 3768 k->initialize(CHECK_NULL); 3769 } 3770 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3771 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3772 // Add a reference to the loader (actually mirror because anonymous classes will not have 3773 // distinct loaders) to ensure the metadata is kept alive. 3774 // This mirror may be different than the one in clazz field. 3775 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3776 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3777 } 3778 return resolved_method; 3779 } 3780 3781 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3782 assert(is_instance(lform), "wrong type"); 3783 return lform->obj_field(_vmentry_offset); 3784 } 3785 3786 3787 // Support for java_lang_invoke_MethodType 3788 3789 int java_lang_invoke_MethodType::_rtype_offset; 3790 int java_lang_invoke_MethodType::_ptypes_offset; 3791 3792 #define METHODTYPE_FIELDS_DO(macro) \ 3793 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3794 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3795 3796 void java_lang_invoke_MethodType::compute_offsets() { 3797 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3798 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3799 } 3800 3801 #if INCLUDE_CDS 3802 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) { 3803 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3804 } 3805 #endif 3806 3807 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3808 st->print("("); 3809 objArrayOop pts = ptypes(mt); 3810 for (int i = 0, limit = pts->length(); i < limit; i++) { 3811 java_lang_Class::print_signature(pts->obj_at(i), st); 3812 } 3813 st->print(")"); 3814 java_lang_Class::print_signature(rtype(mt), st); 3815 } 3816 3817 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3818 ResourceMark rm; 3819 stringStream buffer(128); 3820 print_signature(mt, &buffer); 3821 const char* sigstr = buffer.base(); 3822 int siglen = (int) buffer.size(); 3823 Symbol *name; 3824 if (!intern_if_not_found) { 3825 name = SymbolTable::probe(sigstr, siglen); 3826 } else { 3827 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3828 } 3829 return name; 3830 } 3831 3832 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3833 if (oopDesc::equals(mt1, mt2)) 3834 return true; 3835 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3836 return false; 3837 if (ptype_count(mt1) != ptype_count(mt2)) 3838 return false; 3839 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3840 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3841 return false; 3842 } 3843 return true; 3844 } 3845 3846 oop java_lang_invoke_MethodType::rtype(oop mt) { 3847 assert(is_instance(mt), "must be a MethodType"); 3848 return mt->obj_field(_rtype_offset); 3849 } 3850 3851 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3852 assert(is_instance(mt), "must be a MethodType"); 3853 return (objArrayOop) mt->obj_field(_ptypes_offset); 3854 } 3855 3856 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3857 return ptypes(mt)->obj_at(idx); 3858 } 3859 3860 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3861 return ptypes(mt)->length(); 3862 } 3863 3864 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3865 objArrayOop pts = ptypes(mt); 3866 int count = pts->length(); 3867 int slots = 0; 3868 for (int i = 0; i < count; i++) { 3869 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3870 slots += type2size[bt]; 3871 } 3872 return slots; 3873 } 3874 3875 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3876 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3877 return type2size[bt]; 3878 } 3879 3880 3881 // Support for java_lang_invoke_CallSite 3882 3883 int java_lang_invoke_CallSite::_target_offset; 3884 int java_lang_invoke_CallSite::_context_offset; 3885 3886 #define CALLSITE_FIELDS_DO(macro) \ 3887 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3888 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3889 3890 void java_lang_invoke_CallSite::compute_offsets() { 3891 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3892 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3893 } 3894 3895 #if INCLUDE_CDS 3896 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) { 3897 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3898 } 3899 #endif 3900 3901 oop java_lang_invoke_CallSite::context(oop call_site) { 3902 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3903 3904 oop dep_oop = call_site->obj_field(_context_offset); 3905 return dep_oop; 3906 } 3907 3908 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3909 3910 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3911 3912 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3913 InstanceKlass* k = SystemDictionary::Context_klass(); 3914 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3915 } 3916 3917 #if INCLUDE_CDS 3918 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) { 3919 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3920 } 3921 #endif 3922 3923 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3924 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3925 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3926 DependencyContext dep_ctx(vmdeps_addr); 3927 return dep_ctx; 3928 } 3929 3930 // Support for java_security_AccessControlContext 3931 3932 int java_security_AccessControlContext::_context_offset = 0; 3933 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3934 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3935 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3936 3937 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3938 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3939 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3940 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3941 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3942 3943 void java_security_AccessControlContext::compute_offsets() { 3944 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3945 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3946 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3947 } 3948 3949 #if INCLUDE_CDS 3950 void java_security_AccessControlContext::serialize(SerializeClosure* f) { 3951 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3952 } 3953 #endif 3954 3955 bool java_security_AccessControlContext::is_authorized(Handle context) { 3956 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3957 assert(_isAuthorized_offset != -1, "should be set"); 3958 return context->bool_field(_isAuthorized_offset) != 0; 3959 } 3960 3961 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3962 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3963 // Ensure klass is initialized 3964 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3965 // Allocate result 3966 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3967 // Fill in values 3968 result->obj_field_put(_context_offset, context()); 3969 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3970 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3971 // whitelist AccessControlContexts created by the JVM if present 3972 if (_isAuthorized_offset != -1) { 3973 result->bool_field_put(_isAuthorized_offset, true); 3974 } 3975 return result; 3976 } 3977 3978 3979 // Support for java_lang_ClassLoader 3980 3981 bool java_lang_ClassLoader::offsets_computed = false; 3982 int java_lang_ClassLoader::_loader_data_offset = -1; 3983 int java_lang_ClassLoader::parallelCapable_offset = -1; 3984 int java_lang_ClassLoader::name_offset = -1; 3985 int java_lang_ClassLoader::unnamedModule_offset = -1; 3986 3987 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3988 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3989 return HeapAccess<>::load_at(loader, _loader_data_offset); 3990 } 3991 3992 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) { 3993 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3994 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data); 3995 } 3996 3997 #define CLASSLOADER_FIELDS_DO(macro) \ 3998 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 3999 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4000 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4001 macro(parent_offset, k1, "parent", classloader_signature, false) 4002 4003 void java_lang_ClassLoader::compute_offsets() { 4004 assert(!offsets_computed, "offsets should be initialized only once"); 4005 offsets_computed = true; 4006 4007 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4008 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4009 4010 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4011 } 4012 4013 #if INCLUDE_CDS 4014 void java_lang_ClassLoader::serialize(SerializeClosure* f) { 4015 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4016 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4017 } 4018 #endif 4019 4020 oop java_lang_ClassLoader::parent(oop loader) { 4021 assert(is_instance(loader), "loader must be oop"); 4022 return loader->obj_field(parent_offset); 4023 } 4024 4025 oop java_lang_ClassLoader::name(oop loader) { 4026 assert(is_instance(loader), "loader must be oop"); 4027 return loader->obj_field(name_offset); 4028 } 4029 4030 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4031 assert(is_instance(loader), "loader must be oop"); 4032 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4033 oop acl = loader; 4034 debug_only(jint loop_count = 0); 4035 // This loop taken verbatim from ClassLoader.java: 4036 do { 4037 acl = parent(acl); 4038 if (oopDesc::equals(cl, acl)) { 4039 return true; 4040 } 4041 assert(++loop_count > 0, "loop_count overflow"); 4042 } while (acl != NULL); 4043 return false; 4044 } 4045 4046 bool java_lang_ClassLoader::is_instance(oop obj) { 4047 return obj != NULL && is_subclass(obj->klass()); 4048 } 4049 4050 4051 // For class loader classes, parallelCapable defined 4052 // based on non-null field 4053 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4054 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4055 if (parallelCapable_offset == -1) { 4056 // Default for backward compatibility is false 4057 return false; 4058 } 4059 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4060 } 4061 4062 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4063 // Fix for 4474172; see evaluation for more details 4064 loader = non_reflection_class_loader(loader); 4065 4066 oop cl = SystemDictionary::java_system_loader(); 4067 while(cl != NULL) { 4068 if (oopDesc::equals(cl, loader)) return true; 4069 cl = parent(cl); 4070 } 4071 return false; 4072 } 4073 4074 // Return true if this is one of the class loaders associated with 4075 // the generated bytecodes for reflection. 4076 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4077 if (loader != NULL) { 4078 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4079 // This might be null in non-1.4 JDKs 4080 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4081 } 4082 return false; 4083 } 4084 4085 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4086 // See whether this is one of the class loaders associated with 4087 // the generated bytecodes for reflection, and if so, "magically" 4088 // delegate to its parent to prevent class loading from occurring 4089 // in places where applications using reflection didn't expect it. 4090 if (is_reflection_class_loader(loader)) { 4091 return parent(loader); 4092 } 4093 return loader; 4094 } 4095 4096 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4097 assert(is_instance(loader), "loader must be oop"); 4098 return loader->obj_field(unnamedModule_offset); 4099 } 4100 4101 // Caller needs ResourceMark. 4102 const char* java_lang_ClassLoader::describe_external(const oop loader) { 4103 if (loader == NULL) { 4104 return "<bootstrap>"; 4105 } 4106 4107 bool well_known_loader = SystemDictionary::is_system_class_loader(loader) || 4108 SystemDictionary::is_platform_class_loader(loader); 4109 4110 const char* name = NULL; 4111 oop nameOop = java_lang_ClassLoader::name(loader); 4112 if (nameOop != NULL) { 4113 name = java_lang_String::as_utf8_string(nameOop); 4114 } 4115 if (name == NULL) { 4116 // Use placeholder for missing name to have fixed message format. 4117 name = "<unnamed>"; 4118 } 4119 4120 stringStream ss; 4121 ss.print("\"%s\" (instance of %s", name, loader->klass()->external_name()); 4122 if (!well_known_loader) { 4123 const char* parentName = NULL; 4124 oop pl = java_lang_ClassLoader::parent(loader); 4125 if (pl != NULL) { 4126 oop parentNameOop = java_lang_ClassLoader::name(pl); 4127 if (parentNameOop != NULL) { 4128 parentName = java_lang_String::as_utf8_string(parentNameOop); 4129 } 4130 if (parentName == NULL) { 4131 parentName = "<unnamed>"; 4132 } 4133 ss.print(", child of \"%s\" %s", parentName, pl->klass()->external_name()); 4134 } else { 4135 ss.print(", child of <bootstrap>"); 4136 } 4137 } 4138 ss.print(")"); 4139 4140 return ss.as_string(); 4141 } 4142 4143 // Support for java_lang_System 4144 // 4145 #define SYSTEM_FIELDS_DO(macro) \ 4146 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4147 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4148 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4149 macro(static_security_offset, k, "security", security_manager_signature, true) 4150 4151 void java_lang_System::compute_offsets() { 4152 InstanceKlass* k = SystemDictionary::System_klass(); 4153 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4154 } 4155 4156 #if INCLUDE_CDS 4157 void java_lang_System::serialize(SerializeClosure* f) { 4158 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4159 } 4160 #endif 4161 4162 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4163 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4164 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4165 4166 4167 bool java_lang_System::has_security_manager() { 4168 InstanceKlass* ik = SystemDictionary::System_klass(); 4169 oop base = ik->static_field_base_raw(); 4170 return base->obj_field(static_security_offset) != NULL; 4171 } 4172 4173 int java_lang_Class::_klass_offset; 4174 int java_lang_Class::_array_klass_offset; 4175 int java_lang_Class::_oop_size_offset; 4176 int java_lang_Class::_static_oop_field_count_offset; 4177 int java_lang_Class::_class_loader_offset; 4178 int java_lang_Class::_module_offset; 4179 int java_lang_Class::_protection_domain_offset; 4180 int java_lang_Class::_component_mirror_offset; 4181 int java_lang_Class::_init_lock_offset; 4182 int java_lang_Class::_signers_offset; 4183 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4184 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4185 int java_lang_Throwable::backtrace_offset; 4186 int java_lang_Throwable::detailMessage_offset; 4187 int java_lang_Throwable::stackTrace_offset; 4188 int java_lang_Throwable::depth_offset; 4189 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4190 int java_lang_reflect_AccessibleObject::override_offset; 4191 int java_lang_reflect_Method::clazz_offset; 4192 int java_lang_reflect_Method::name_offset; 4193 int java_lang_reflect_Method::returnType_offset; 4194 int java_lang_reflect_Method::parameterTypes_offset; 4195 int java_lang_reflect_Method::exceptionTypes_offset; 4196 int java_lang_reflect_Method::slot_offset; 4197 int java_lang_reflect_Method::modifiers_offset; 4198 int java_lang_reflect_Method::signature_offset; 4199 int java_lang_reflect_Method::annotations_offset; 4200 int java_lang_reflect_Method::parameter_annotations_offset; 4201 int java_lang_reflect_Method::annotation_default_offset; 4202 int java_lang_reflect_Method::type_annotations_offset; 4203 int java_lang_reflect_Constructor::clazz_offset; 4204 int java_lang_reflect_Constructor::parameterTypes_offset; 4205 int java_lang_reflect_Constructor::exceptionTypes_offset; 4206 int java_lang_reflect_Constructor::slot_offset; 4207 int java_lang_reflect_Constructor::modifiers_offset; 4208 int java_lang_reflect_Constructor::signature_offset; 4209 int java_lang_reflect_Constructor::annotations_offset; 4210 int java_lang_reflect_Constructor::parameter_annotations_offset; 4211 int java_lang_reflect_Constructor::type_annotations_offset; 4212 int java_lang_reflect_Field::clazz_offset; 4213 int java_lang_reflect_Field::name_offset; 4214 int java_lang_reflect_Field::type_offset; 4215 int java_lang_reflect_Field::slot_offset; 4216 int java_lang_reflect_Field::modifiers_offset; 4217 int java_lang_reflect_Field::signature_offset; 4218 int java_lang_reflect_Field::annotations_offset; 4219 int java_lang_reflect_Field::type_annotations_offset; 4220 int java_lang_reflect_Parameter::name_offset; 4221 int java_lang_reflect_Parameter::modifiers_offset; 4222 int java_lang_reflect_Parameter::index_offset; 4223 int java_lang_reflect_Parameter::executable_offset; 4224 int java_lang_boxing_object::value_offset; 4225 int java_lang_boxing_object::long_value_offset; 4226 int java_lang_ref_Reference::referent_offset; 4227 int java_lang_ref_Reference::queue_offset; 4228 int java_lang_ref_Reference::next_offset; 4229 int java_lang_ref_Reference::discovered_offset; 4230 int java_lang_ref_SoftReference::timestamp_offset; 4231 int java_lang_ref_SoftReference::static_clock_offset; 4232 int java_lang_ClassLoader::parent_offset; 4233 int java_lang_System::static_in_offset; 4234 int java_lang_System::static_out_offset; 4235 int java_lang_System::static_err_offset; 4236 int java_lang_System::static_security_offset; 4237 int java_lang_StackTraceElement::methodName_offset; 4238 int java_lang_StackTraceElement::fileName_offset; 4239 int java_lang_StackTraceElement::lineNumber_offset; 4240 int java_lang_StackTraceElement::moduleName_offset; 4241 int java_lang_StackTraceElement::moduleVersion_offset; 4242 int java_lang_StackTraceElement::classLoaderName_offset; 4243 int java_lang_StackTraceElement::declaringClass_offset; 4244 int java_lang_StackTraceElement::declaringClassObject_offset; 4245 int java_lang_StackFrameInfo::_memberName_offset; 4246 int java_lang_StackFrameInfo::_bci_offset; 4247 int java_lang_StackFrameInfo::_version_offset; 4248 int java_lang_LiveStackFrameInfo::_monitors_offset; 4249 int java_lang_LiveStackFrameInfo::_locals_offset; 4250 int java_lang_LiveStackFrameInfo::_operands_offset; 4251 int java_lang_LiveStackFrameInfo::_mode_offset; 4252 int java_lang_AssertionStatusDirectives::classes_offset; 4253 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4254 int java_lang_AssertionStatusDirectives::packages_offset; 4255 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4256 int java_lang_AssertionStatusDirectives::deflt_offset; 4257 int java_nio_Buffer::_limit_offset; 4258 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 4259 int reflect_ConstantPool::_oop_offset; 4260 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4261 4262 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4263 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4264 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4265 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4266 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4267 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4268 macro(methodName_offset, k, "methodName", string_signature, false); \ 4269 macro(fileName_offset, k, "fileName", string_signature, false); \ 4270 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4271 4272 // Support for java_lang_StackTraceElement 4273 void java_lang_StackTraceElement::compute_offsets() { 4274 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4275 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4276 } 4277 4278 #if INCLUDE_CDS 4279 void java_lang_StackTraceElement::serialize(SerializeClosure* f) { 4280 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4281 } 4282 #endif 4283 4284 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4285 element->obj_field_put(fileName_offset, value); 4286 } 4287 4288 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4289 element->obj_field_put(declaringClass_offset, value); 4290 } 4291 4292 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4293 element->obj_field_put(methodName_offset, value); 4294 } 4295 4296 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4297 element->int_field_put(lineNumber_offset, value); 4298 } 4299 4300 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4301 element->obj_field_put(moduleName_offset, value); 4302 } 4303 4304 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4305 element->obj_field_put(moduleVersion_offset, value); 4306 } 4307 4308 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4309 element->obj_field_put(classLoaderName_offset, value); 4310 } 4311 4312 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4313 element->obj_field_put(declaringClassObject_offset, value); 4314 } 4315 4316 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4317 element->short_field_put(_version_offset, value); 4318 } 4319 4320 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4321 element->int_field_put(_bci_offset, value); 4322 } 4323 4324 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4325 element->obj_field_put(_monitors_offset, value); 4326 } 4327 4328 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4329 element->obj_field_put(_locals_offset, value); 4330 } 4331 4332 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4333 element->obj_field_put(_operands_offset, value); 4334 } 4335 4336 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4337 element->int_field_put(_mode_offset, value); 4338 } 4339 4340 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4341 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4342 macro(classes_offset, k, "classes", string_array_signature, false); \ 4343 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4344 macro(packages_offset, k, "packages", string_array_signature, false); \ 4345 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4346 macro(deflt_offset, k, "deflt", bool_signature, false) 4347 4348 void java_lang_AssertionStatusDirectives::compute_offsets() { 4349 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4350 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4351 } 4352 4353 #if INCLUDE_CDS 4354 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) { 4355 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4356 } 4357 #endif 4358 4359 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4360 o->obj_field_put(classes_offset, val); 4361 } 4362 4363 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4364 o->obj_field_put(classEnabled_offset, val); 4365 } 4366 4367 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4368 o->obj_field_put(packages_offset, val); 4369 } 4370 4371 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4372 o->obj_field_put(packageEnabled_offset, val); 4373 } 4374 4375 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4376 o->bool_field_put(deflt_offset, val); 4377 } 4378 4379 4380 // Support for intrinsification of java.nio.Buffer.checkIndex 4381 int java_nio_Buffer::limit_offset() { 4382 return _limit_offset; 4383 } 4384 4385 #define BUFFER_FIELDS_DO(macro) \ 4386 macro(_limit_offset, k, "limit", int_signature, false) 4387 4388 void java_nio_Buffer::compute_offsets() { 4389 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4390 assert(k != NULL, "must be loaded in 1.4+"); 4391 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4392 } 4393 4394 #if INCLUDE_CDS 4395 void java_nio_Buffer::serialize(SerializeClosure* f) { 4396 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4397 } 4398 #endif 4399 4400 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 4401 if (_owner_offset != 0) return; 4402 4403 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 4404 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 4405 compute_offset(_owner_offset, k, 4406 "exclusiveOwnerThread", vmSymbols::thread_signature()); 4407 } 4408 4409 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4410 assert(_owner_offset != 0, "Must be initialized"); 4411 return obj->obj_field(_owner_offset); 4412 } 4413 4414 static int member_offset(int hardcoded_offset) { 4415 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4416 } 4417 4418 // Compute hard-coded offsets 4419 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4420 // are not available to determine the offset_of_static_fields. 4421 void JavaClasses::compute_hard_coded_offsets() { 4422 4423 // java_lang_boxing_object 4424 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4425 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4426 4427 // java_lang_ref_Reference 4428 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4429 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4430 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4431 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4432 } 4433 4434 4435 // Compute non-hard-coded field offsets of all the classes in this file 4436 void JavaClasses::compute_offsets() { 4437 if (UseSharedSpaces) { 4438 return; // field offsets are loaded from archive 4439 } 4440 4441 // java_lang_Class::compute_offsets was called earlier in bootstrap 4442 java_lang_System::compute_offsets(); 4443 java_lang_ClassLoader::compute_offsets(); 4444 java_lang_Throwable::compute_offsets(); 4445 java_lang_Thread::compute_offsets(); 4446 java_lang_ThreadGroup::compute_offsets(); 4447 java_lang_AssertionStatusDirectives::compute_offsets(); 4448 java_lang_ref_SoftReference::compute_offsets(); 4449 java_lang_invoke_MethodHandle::compute_offsets(); 4450 java_lang_invoke_DirectMethodHandle::compute_offsets(); 4451 java_lang_invoke_MemberName::compute_offsets(); 4452 java_lang_invoke_ResolvedMethodName::compute_offsets(); 4453 java_lang_invoke_LambdaForm::compute_offsets(); 4454 java_lang_invoke_MethodType::compute_offsets(); 4455 java_lang_invoke_CallSite::compute_offsets(); 4456 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 4457 java_security_AccessControlContext::compute_offsets(); 4458 // Initialize reflection classes. The layouts of these classes 4459 // changed with the new reflection implementation in JDK 1.4, and 4460 // since the Universe doesn't know what JDK version it is until this 4461 // point we defer computation of these offsets until now. 4462 java_lang_reflect_AccessibleObject::compute_offsets(); 4463 java_lang_reflect_Method::compute_offsets(); 4464 java_lang_reflect_Constructor::compute_offsets(); 4465 java_lang_reflect_Field::compute_offsets(); 4466 java_nio_Buffer::compute_offsets(); 4467 reflect_ConstantPool::compute_offsets(); 4468 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 4469 java_lang_reflect_Parameter::compute_offsets(); 4470 java_lang_Module::compute_offsets(); 4471 java_lang_StackTraceElement::compute_offsets(); 4472 java_lang_StackFrameInfo::compute_offsets(); 4473 java_lang_LiveStackFrameInfo::compute_offsets(); 4474 4475 // generated interpreter code wants to know about the offsets we just computed: 4476 AbstractAssembler::update_delayed_values(); 4477 } 4478 4479 #ifndef PRODUCT 4480 4481 // These functions exist to assert the validity of hard-coded field offsets to guard 4482 // against changes in the class files 4483 4484 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4485 EXCEPTION_MARK; 4486 fieldDescriptor fd; 4487 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4488 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4489 InstanceKlass* ik = InstanceKlass::cast(k); 4490 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4491 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4492 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4493 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4494 return false; 4495 } 4496 if (fd.is_static()) { 4497 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4498 return false; 4499 } 4500 if (fd.offset() == hardcoded_offset ) { 4501 return true; 4502 } else { 4503 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4504 klass_name, field_name, hardcoded_offset, fd.offset()); 4505 return false; 4506 } 4507 } 4508 4509 // Check the hard-coded field offsets of all the classes in this file 4510 4511 void JavaClasses::check_offsets() { 4512 bool valid = true; 4513 4514 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4515 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4516 4517 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4518 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4519 4520 // Boxed primitive objects (java_lang_boxing_object) 4521 4522 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4523 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4524 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4525 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4526 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4527 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4528 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4529 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4530 4531 // java.lang.ref.Reference 4532 4533 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4534 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4535 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4536 // Fake field 4537 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4538 4539 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4540 } 4541 4542 #endif // PRODUCT 4543 4544 int InjectedField::compute_offset() { 4545 InstanceKlass* ik = InstanceKlass::cast(klass()); 4546 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4547 if (!may_be_java && !fs.access_flags().is_internal()) { 4548 // Only look at injected fields 4549 continue; 4550 } 4551 if (fs.name() == name() && fs.signature() == signature()) { 4552 return fs.offset(); 4553 } 4554 } 4555 ResourceMark rm; 4556 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)" : ""); 4557 #ifndef PRODUCT 4558 ik->print(); 4559 tty->print_cr("all fields:"); 4560 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4561 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4562 } 4563 #endif //PRODUCT 4564 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4565 return -1; 4566 } 4567 4568 void javaClasses_init() { 4569 JavaClasses::compute_offsets(); 4570 JavaClasses::check_offsets(); 4571 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4572 }