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 "logging/log.hpp" 37 #include "logging/logStream.hpp" 38 #include "memory/oopFactory.hpp" 39 #include "memory/metaspaceShared.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "memory/universe.hpp" 42 #include "oops/fieldStreams.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/instanceMirrorKlass.hpp" 45 #include "oops/klass.hpp" 46 #include "oops/method.inline.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/symbol.hpp" 50 #include "oops/typeArrayOop.inline.hpp" 51 #include "prims/resolvedMethodTable.hpp" 52 #include "runtime/fieldDescriptor.hpp" 53 #include "runtime/frame.inline.hpp" 54 #include "runtime/handles.inline.hpp" 55 #include "runtime/interfaceSupport.inline.hpp" 56 #include "runtime/java.hpp" 57 #include "runtime/javaCalls.hpp" 58 #include "runtime/jniHandles.inline.hpp" 59 #include "runtime/safepoint.hpp" 60 #include "runtime/thread.inline.hpp" 61 #include "runtime/vframe.inline.hpp" 62 #include "utilities/align.hpp" 63 #include "utilities/preserveException.hpp" 64 65 #if INCLUDE_JVMCI 66 #include "jvmci/jvmciJavaClasses.hpp" 67 #endif 68 69 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 70 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 71 72 #if INCLUDE_CDS 73 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 74 f->do_u4((u4*)&_##name##_offset); 75 #endif 76 77 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 78 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 79 80 InjectedField JavaClasses::_injected_fields[] = { 81 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 82 }; 83 84 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 85 return _injected_fields[id].compute_offset(); 86 } 87 88 89 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 90 *field_count = 0; 91 92 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 93 if (sid == vmSymbols::NO_SID) { 94 // Only well known classes can inject fields 95 return NULL; 96 } 97 98 int count = 0; 99 int start = -1; 100 101 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 102 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 103 count++; \ 104 if (start == -1) start = klass##_##name##_enum; \ 105 } 106 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 107 #undef LOOKUP_INJECTED_FIELD 108 109 if (start != -1) { 110 *field_count = count; 111 return _injected_fields + start; 112 } 113 return NULL; 114 } 115 116 117 // Helpful routine for computing field offsets at run time rather than hardcoding them 118 // Finds local fields only, including static fields. Static field offsets are from the 119 // beginning of the mirror. 120 static void compute_offset(int &dest_offset, 121 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 122 bool is_static = false) { 123 fieldDescriptor fd; 124 if (ik == NULL) { 125 ResourceMark rm; 126 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 127 vm_exit_during_initialization("Invalid layout of preloaded class"); 128 } 129 130 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 131 ResourceMark rm; 132 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 133 name_symbol->as_C_string(), signature_symbol->as_C_string()); 134 #ifndef PRODUCT 135 // Prints all fields and offsets 136 Log(class) lt; 137 LogStream ls(lt.error()); 138 ik->print_on(&ls); 139 #endif //PRODUCT 140 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 141 } 142 dest_offset = fd.offset(); 143 } 144 145 // Overloading to pass name as a string. 146 static void compute_offset(int& dest_offset, InstanceKlass* ik, 147 const char* name_string, Symbol* signature_symbol, 148 bool is_static = false) { 149 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 150 if (name == NULL) { 151 ResourceMark rm; 152 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 153 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name()); 154 } 155 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 156 } 157 158 // Same as above but for "optional" offsets that might not be present in certain JDK versions 159 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this 160 // function should be removed. 161 static void 162 compute_optional_offset(int& dest_offset, 163 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) { 164 fieldDescriptor fd; 165 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { 166 dest_offset = fd.offset(); 167 } 168 } 169 170 int java_lang_String::value_offset = 0; 171 int java_lang_String::hash_offset = 0; 172 int java_lang_String::coder_offset = 0; 173 174 bool java_lang_String::initialized = false; 175 176 bool java_lang_String::is_instance(oop obj) { 177 return is_instance_inlined(obj); 178 } 179 180 #if INCLUDE_CDS 181 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 182 f->do_u4((u4*)&offset) 183 184 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 185 f->do_u4((u4*)&offset) 186 #endif 187 188 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 189 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 190 191 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 192 compute_optional_offset(offset, klass, name, vmSymbols::signature()) 193 194 #define STRING_FIELDS_DO(macro) \ 195 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 196 macro(hash_offset, k, "hash", int_signature, false); \ 197 macro(coder_offset, k, "coder", byte_signature, false) 198 199 void java_lang_String::compute_offsets() { 200 if (initialized) { 201 return; 202 } 203 204 InstanceKlass* k = SystemDictionary::String_klass(); 205 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 206 207 initialized = true; 208 } 209 210 #if INCLUDE_CDS 211 void java_lang_String::serialize(SerializeClosure* f) { 212 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 213 f->do_u4((u4*)&initialized); 214 } 215 #endif 216 217 class CompactStringsFixup : public FieldClosure { 218 private: 219 bool _value; 220 221 public: 222 CompactStringsFixup(bool value) : _value(value) {} 223 224 void do_field(fieldDescriptor* fd) { 225 if (fd->name() == vmSymbols::compact_strings_name()) { 226 oop mirror = fd->field_holder()->java_mirror(); 227 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 228 assert(mirror != NULL, "String must have mirror already"); 229 mirror->bool_field_put(fd->offset(), _value); 230 } 231 } 232 }; 233 234 void java_lang_String::set_compact_strings(bool value) { 235 CompactStringsFixup fix(value); 236 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 237 } 238 239 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 240 assert(initialized, "Must be initialized"); 241 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 242 243 // Create the String object first, so there's a chance that the String 244 // and the char array it points to end up in the same cache line. 245 oop obj; 246 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 247 248 // Create the char array. The String object must be handlized here 249 // because GC can happen as a result of the allocation attempt. 250 Handle h_obj(THREAD, obj); 251 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 252 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 253 254 // Point the String at the char array 255 obj = h_obj(); 256 set_value(obj, buffer); 257 // No need to zero the offset, allocation zero'ed the entire String object 258 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 259 return h_obj; 260 } 261 262 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 263 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 264 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 265 typeArrayOop buffer = value(h_obj()); 266 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 267 if (is_latin1) { 268 for (int index = 0; index < length; index++) { 269 buffer->byte_at_put(index, (jbyte)unicode[index]); 270 } 271 } else { 272 for (int index = 0; index < length; index++) { 273 buffer->char_at_put(index, unicode[index]); 274 } 275 } 276 277 #ifdef ASSERT 278 { 279 ResourceMark rm; 280 char* expected = UNICODE::as_utf8(unicode, length); 281 char* actual = as_utf8_string(h_obj()); 282 if (strcmp(expected, actual) != 0) { 283 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 284 ShouldNotReachHere(); 285 } 286 } 287 #endif 288 289 return h_obj; 290 } 291 292 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 293 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 294 return h_obj(); 295 } 296 297 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 298 if (utf8_str == NULL) { 299 return Handle(); 300 } 301 bool has_multibyte, is_latin1; 302 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 303 if (!CompactStrings) { 304 has_multibyte = true; 305 is_latin1 = false; 306 } 307 308 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 309 if (length > 0) { 310 if (!has_multibyte) { 311 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 312 } else if (is_latin1) { 313 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 314 } else { 315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 316 } 317 } 318 319 #ifdef ASSERT 320 // This check is too strict because the input string is not necessarily valid UTF8. 321 // For example, it may be created with arbitrary content via jni_NewStringUTF. 322 /* 323 { 324 ResourceMark rm; 325 const char* expected = utf8_str; 326 char* actual = as_utf8_string(h_obj()); 327 if (strcmp(expected, actual) != 0) { 328 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 329 ShouldNotReachHere(); 330 } 331 } 332 */ 333 #endif 334 335 return h_obj; 336 } 337 338 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 339 Handle h_obj = create_from_str(utf8_str, CHECK_0); 340 return h_obj(); 341 } 342 343 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 344 const char* utf8_str = (char*)symbol->bytes(); 345 int utf8_len = symbol->utf8_length(); 346 347 bool has_multibyte, is_latin1; 348 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 349 if (!CompactStrings) { 350 has_multibyte = true; 351 is_latin1 = false; 352 } 353 354 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 355 if (length > 0) { 356 if (!has_multibyte) { 357 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 358 } else if (is_latin1) { 359 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 360 } else { 361 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 362 } 363 } 364 365 #ifdef ASSERT 366 { 367 ResourceMark rm; 368 const char* expected = symbol->as_utf8(); 369 char* actual = as_utf8_string(h_obj()); 370 if (strncmp(expected, actual, utf8_len) != 0) { 371 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 372 ShouldNotReachHere(); 373 } 374 } 375 #endif 376 377 return h_obj; 378 } 379 380 // Converts a C string to a Java String based on current encoding 381 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 382 assert(str != NULL, "bad arguments"); 383 384 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 385 static to_java_string_fn_t _to_java_string_fn = NULL; 386 387 if (_to_java_string_fn == NULL) { 388 void *lib_handle = os::native_java_library(); 389 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 390 if (_to_java_string_fn == NULL) { 391 fatal("NewStringPlatform missing"); 392 } 393 } 394 395 jstring js = NULL; 396 { JavaThread* thread = (JavaThread*)THREAD; 397 assert(thread->is_Java_thread(), "must be java thread"); 398 HandleMark hm(thread); 399 ThreadToNativeFromVM ttn(thread); 400 js = (_to_java_string_fn)(thread->jni_environment(), str); 401 } 402 return Handle(THREAD, JNIHandles::resolve(js)); 403 } 404 405 // Converts a Java String to a native C string that can be used for 406 // native OS calls. 407 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 408 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 409 static to_platform_string_fn_t _to_platform_string_fn = NULL; 410 411 if (_to_platform_string_fn == NULL) { 412 void *lib_handle = os::native_java_library(); 413 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 414 if (_to_platform_string_fn == NULL) { 415 fatal("GetStringPlatformChars missing"); 416 } 417 } 418 419 char *native_platform_string; 420 { JavaThread* thread = (JavaThread*)THREAD; 421 assert(thread->is_Java_thread(), "must be java thread"); 422 JNIEnv *env = thread->jni_environment(); 423 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 424 bool is_copy; 425 HandleMark hm(thread); 426 ThreadToNativeFromVM ttn(thread); 427 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 428 assert(is_copy == JNI_TRUE, "is_copy value changed"); 429 JNIHandles::destroy_local(js); 430 } 431 return native_platform_string; 432 } 433 434 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 435 oop obj = java_string(); 436 // Typical usage is to convert all '/' to '.' in string. 437 typeArrayOop value = java_lang_String::value(obj); 438 int length = java_lang_String::length(obj); 439 bool is_latin1 = java_lang_String::is_latin1(obj); 440 441 // First check if any from_char exist 442 int index; // Declared outside, used later 443 for (index = 0; index < length; index++) { 444 jchar c = !is_latin1 ? value->char_at(index) : 445 ((jchar) value->byte_at(index)) & 0xff; 446 if (c == from_char) { 447 break; 448 } 449 } 450 if (index == length) { 451 // No from_char, so do not copy. 452 return java_string; 453 } 454 455 // Check if result string will be latin1 456 bool to_is_latin1 = false; 457 458 // Replacement char must be latin1 459 if (CompactStrings && UNICODE::is_latin1(to_char)) { 460 if (is_latin1) { 461 // Source string is latin1 as well 462 to_is_latin1 = true; 463 } else if (!UNICODE::is_latin1(from_char)) { 464 // We are replacing an UTF16 char. Scan string to 465 // check if result can be latin1 encoded. 466 to_is_latin1 = true; 467 for (index = 0; index < length; index++) { 468 jchar c = value->char_at(index); 469 if (c != from_char && !UNICODE::is_latin1(c)) { 470 to_is_latin1 = false; 471 break; 472 } 473 } 474 } 475 } 476 477 // Create new UNICODE (or byte) buffer. Must handlize value because GC 478 // may happen during String and char array creation. 479 typeArrayHandle h_value(THREAD, value); 480 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 481 typeArrayOop from_buffer = h_value(); 482 typeArrayOop to_buffer = java_lang_String::value(string()); 483 484 // Copy contents 485 for (index = 0; index < length; index++) { 486 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 487 ((jchar) from_buffer->byte_at(index)) & 0xff; 488 if (c == from_char) { 489 c = to_char; 490 } 491 if (!to_is_latin1) { 492 to_buffer->char_at_put(index, c); 493 } else { 494 to_buffer->byte_at_put(index, (jbyte) c); 495 } 496 } 497 return string; 498 } 499 500 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 501 typeArrayOop value = java_lang_String::value(java_string); 502 length = java_lang_String::length(java_string); 503 bool is_latin1 = java_lang_String::is_latin1(java_string); 504 505 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 506 if (result != NULL) { 507 if (!is_latin1) { 508 for (int index = 0; index < length; index++) { 509 result[index] = value->char_at(index); 510 } 511 } else { 512 for (int index = 0; index < length; index++) { 513 result[index] = ((jchar) value->byte_at(index)) & 0xff; 514 } 515 } 516 } else { 517 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 518 } 519 return result; 520 } 521 522 unsigned int java_lang_String::hash_code(oop java_string) { 523 int length = java_lang_String::length(java_string); 524 // Zero length string will hash to zero with String.hashCode() function. 525 if (length == 0) return 0; 526 527 typeArrayOop value = java_lang_String::value(java_string); 528 bool is_latin1 = java_lang_String::is_latin1(java_string); 529 530 if (is_latin1) { 531 return java_lang_String::hash_code(value->byte_at_addr(0), length); 532 } else { 533 return java_lang_String::hash_code(value->char_at_addr(0), length); 534 } 535 } 536 537 char* java_lang_String::as_quoted_ascii(oop java_string) { 538 typeArrayOop value = java_lang_String::value(java_string); 539 int length = java_lang_String::length(java_string); 540 bool is_latin1 = java_lang_String::is_latin1(java_string); 541 542 if (length == 0) return NULL; 543 544 char* result; 545 int result_length; 546 if (!is_latin1) { 547 jchar* base = value->char_at_addr(0); 548 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 549 result = NEW_RESOURCE_ARRAY(char, result_length); 550 UNICODE::as_quoted_ascii(base, length, result, result_length); 551 } else { 552 jbyte* base = value->byte_at_addr(0); 553 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 554 result = NEW_RESOURCE_ARRAY(char, result_length); 555 UNICODE::as_quoted_ascii(base, length, result, result_length); 556 } 557 assert(result_length >= length + 1, "must not be shorter"); 558 assert(result_length == (int)strlen(result) + 1, "must match"); 559 return result; 560 } 561 562 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 563 typeArrayOop value = java_lang_String::value(java_string); 564 int length = java_lang_String::length(java_string); 565 bool is_latin1 = java_lang_String::is_latin1(java_string); 566 if (!is_latin1) { 567 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 568 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 569 return sym; 570 } else { 571 ResourceMark rm; 572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 573 const char* base = UNICODE::as_utf8(position, length); 574 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 575 return sym; 576 } 577 } 578 579 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 580 typeArrayOop value = java_lang_String::value(java_string); 581 int length = java_lang_String::length(java_string); 582 bool is_latin1 = java_lang_String::is_latin1(java_string); 583 if (!is_latin1) { 584 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 585 return SymbolTable::probe_unicode(base, length); 586 } else { 587 ResourceMark rm; 588 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 589 const char* base = UNICODE::as_utf8(position, length); 590 return SymbolTable::probe(base, length); 591 } 592 } 593 594 int java_lang_String::utf8_length(oop java_string) { 595 typeArrayOop value = java_lang_String::value(java_string); 596 int length = java_lang_String::length(java_string); 597 bool is_latin1 = java_lang_String::is_latin1(java_string); 598 if (length == 0) { 599 return 0; 600 } 601 if (!is_latin1) { 602 return UNICODE::utf8_length(value->char_at_addr(0), length); 603 } else { 604 return UNICODE::utf8_length(value->byte_at_addr(0), length); 605 } 606 } 607 608 char* java_lang_String::as_utf8_string(oop java_string) { 609 typeArrayOop value = java_lang_String::value(java_string); 610 int length = java_lang_String::length(java_string); 611 bool is_latin1 = java_lang_String::is_latin1(java_string); 612 if (!is_latin1) { 613 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 614 return UNICODE::as_utf8(position, length); 615 } else { 616 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 617 return UNICODE::as_utf8(position, length); 618 } 619 } 620 621 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 622 typeArrayOop value = java_lang_String::value(java_string); 623 int length = java_lang_String::length(java_string); 624 bool is_latin1 = java_lang_String::is_latin1(java_string); 625 if (!is_latin1) { 626 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 627 return UNICODE::as_utf8(position, length, buf, buflen); 628 } else { 629 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 630 return UNICODE::as_utf8(position, length, buf, buflen); 631 } 632 } 633 634 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 635 typeArrayOop value = java_lang_String::value(java_string); 636 int length = java_lang_String::length(java_string); 637 assert(start + len <= length, "just checking"); 638 bool is_latin1 = java_lang_String::is_latin1(java_string); 639 if (!is_latin1) { 640 jchar* position = value->char_at_addr(start); 641 return UNICODE::as_utf8(position, len); 642 } else { 643 jbyte* position = value->byte_at_addr(start); 644 return UNICODE::as_utf8(position, len); 645 } 646 } 647 648 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 649 typeArrayOop value = java_lang_String::value(java_string); 650 int length = java_lang_String::length(java_string); 651 assert(start + len <= length, "just checking"); 652 bool is_latin1 = java_lang_String::is_latin1(java_string); 653 if (!is_latin1) { 654 jchar* position = value->char_at_addr(start); 655 return UNICODE::as_utf8(position, len, buf, buflen); 656 } else { 657 jbyte* position = value->byte_at_addr(start); 658 return UNICODE::as_utf8(position, len, buf, buflen); 659 } 660 } 661 662 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 663 assert(java_string->klass() == SystemDictionary::String_klass(), 664 "must be java_string"); 665 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 666 int length = java_lang_String::length(java_string); 667 if (length != len) { 668 return false; 669 } 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 for (int i = 0; i < len; i++) { 673 if (value->char_at(i) != chars[i]) { 674 return false; 675 } 676 } 677 } else { 678 for (int i = 0; i < len; i++) { 679 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 680 return false; 681 } 682 } 683 } 684 return true; 685 } 686 687 bool java_lang_String::equals(oop str1, oop str2) { 688 assert(str1->klass() == SystemDictionary::String_klass(), 689 "must be java String"); 690 assert(str2->klass() == SystemDictionary::String_klass(), 691 "must be java String"); 692 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 693 int length1 = java_lang_String::length(str1); 694 bool is_latin1 = java_lang_String::is_latin1(str1); 695 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 696 int length2 = java_lang_String::length(str2); 697 bool is_latin2 = java_lang_String::is_latin1(str2); 698 699 if ((length1 != length2) || (is_latin1 != is_latin2)) { 700 // Strings of different size or with different 701 // coders are never equal. 702 return false; 703 } 704 int blength1 = value1->length(); 705 for (int i = 0; i < blength1; i++) { 706 if (value1->byte_at(i) != value2->byte_at(i)) { 707 return false; 708 } 709 } 710 return true; 711 } 712 713 void java_lang_String::print(oop java_string, outputStream* st) { 714 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 717 if (value == NULL) { 718 // This can happen if, e.g., printing a String 719 // object before its initializer has been called 720 st->print("NULL"); 721 return; 722 } 723 724 int length = java_lang_String::length(java_string); 725 bool is_latin1 = java_lang_String::is_latin1(java_string); 726 727 st->print("\""); 728 for (int index = 0; index < length; index++) { 729 st->print("%c", (!is_latin1) ? value->char_at(index) : 730 ((jchar) value->byte_at(index)) & 0xff ); 731 } 732 st->print("\""); 733 } 734 735 736 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 737 assert(mirror.not_null() && fd->is_static(), "just checking"); 738 if (fd->has_initial_value()) { 739 BasicType t = fd->field_type(); 740 switch (t) { 741 case T_BYTE: 742 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 743 break; 744 case T_BOOLEAN: 745 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 746 break; 747 case T_CHAR: 748 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 749 break; 750 case T_SHORT: 751 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 752 break; 753 case T_INT: 754 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 755 break; 756 case T_FLOAT: 757 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 758 break; 759 case T_DOUBLE: 760 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 761 break; 762 case T_LONG: 763 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 764 break; 765 case T_OBJECT: 766 { 767 assert(fd->signature() == vmSymbols::string_signature(), 768 "just checking"); 769 if (DumpSharedSpaces && oopDesc::is_archive_object(mirror())) { 770 // Archive the String field and update the pointer. 771 oop s = mirror()->obj_field(fd->offset()); 772 oop archived_s = StringTable::create_archived_string(s, CHECK); 773 mirror()->obj_field_put(fd->offset(), archived_s); 774 } else { 775 oop string = fd->string_initial_value(CHECK); 776 mirror()->obj_field_put(fd->offset(), string); 777 } 778 } 779 break; 780 default: 781 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 782 "Illegal ConstantValue attribute in class file"); 783 } 784 } 785 } 786 787 788 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 789 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 790 791 // If the offset was read from the shared archive, it was fixed up already 792 if (!k->is_shared()) { 793 if (k->is_instance_klass()) { 794 // During bootstrap, java.lang.Class wasn't loaded so static field 795 // offsets were computed without the size added it. Go back and 796 // update all the static field offsets to included the size. 797 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 798 if (fs.access_flags().is_static()) { 799 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 800 fs.set_offset(real_offset); 801 } 802 } 803 } 804 } 805 806 if (k->is_shared() && k->has_raw_archived_mirror()) { 807 if (MetaspaceShared::open_archive_heap_region_mapped()) { 808 oop m = k->archived_java_mirror(); 809 assert(m != NULL, "archived mirror is NULL"); 810 assert(oopDesc::is_archive_object(m), "must be archived mirror object"); 811 Handle m_h(THREAD, m); 812 // restore_archived_mirror() clears the klass' _has_raw_archived_mirror flag 813 restore_archived_mirror(k, m_h, Handle(), Handle(), Handle(), CHECK); 814 return; 815 } else { 816 k->set_java_mirror_handle(NULL); 817 k->clear_has_raw_archived_mirror(); 818 } 819 } 820 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 821 } 822 823 void java_lang_Class::initialize_mirror_fields(Klass* k, 824 Handle mirror, 825 Handle protection_domain, 826 TRAPS) { 827 // Allocate a simple java object for a lock. 828 // This needs to be a java object because during class initialization 829 // it can be held across a java call. 830 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 831 set_init_lock(mirror(), r); 832 833 // Set protection domain also 834 set_protection_domain(mirror(), protection_domain()); 835 836 // Initialize static fields 837 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 838 } 839 840 // Set the java.lang.Module module field in the java_lang_Class mirror 841 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 842 if (module.is_null()) { 843 // During startup, the module may be NULL only if java.base has not been defined yet. 844 // Put the class on the fixup_module_list to patch later when the java.lang.Module 845 // for java.base is known. 846 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 847 848 bool javabase_was_defined = false; 849 { 850 MutexLocker m1(Module_lock, THREAD); 851 // Keep list of classes needing java.base module fixup 852 if (!ModuleEntryTable::javabase_defined()) { 853 assert(k->java_mirror() != NULL, "Class's mirror is null"); 854 k->class_loader_data()->inc_keep_alive(); 855 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 856 fixup_module_field_list()->push(k); 857 } else { 858 javabase_was_defined = true; 859 } 860 } 861 862 // If java.base was already defined then patch this particular class with java.base. 863 if (javabase_was_defined) { 864 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 865 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 866 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 867 Handle javabase_handle(THREAD, javabase_entry->module()); 868 set_module(mirror(), javabase_handle()); 869 } 870 } else { 871 assert(Universe::is_module_initialized() || 872 (ModuleEntryTable::javabase_defined() && 873 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 874 "Incorrect java.lang.Module specification while creating mirror"); 875 set_module(mirror(), module()); 876 } 877 } 878 879 // Statically allocate fixup lists because they always get created. 880 void java_lang_Class::allocate_fixup_lists() { 881 GrowableArray<Klass*>* mirror_list = 882 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 883 set_fixup_mirror_list(mirror_list); 884 885 GrowableArray<Klass*>* module_list = 886 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 887 set_fixup_module_field_list(module_list); 888 } 889 890 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 891 Handle module, Handle protection_domain, TRAPS) { 892 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 893 assert(k->java_mirror() == NULL, "should only assign mirror once"); 894 895 // Use this moment of initialization to cache modifier_flags also, 896 // to support Class.getModifiers(). Instance classes recalculate 897 // the cached flags after the class file is parsed, but before the 898 // class is put into the system dictionary. 899 int computed_modifiers = k->compute_modifier_flags(CHECK); 900 k->set_modifier_flags(computed_modifiers); 901 // Class_klass has to be loaded because it is used to allocate 902 // the mirror. 903 if (SystemDictionary::Class_klass_loaded()) { 904 // Allocate mirror (java.lang.Class instance) 905 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 906 Handle mirror(THREAD, mirror_oop); 907 Handle comp_mirror; 908 909 // Setup indirection from mirror->klass 910 java_lang_Class::set_klass(mirror(), k); 911 912 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 913 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 914 915 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 916 917 // It might also have a component mirror. This mirror must already exist. 918 if (k->is_array_klass()) { 919 if (k->is_typeArray_klass()) { 920 BasicType type = TypeArrayKlass::cast(k)->element_type(); 921 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 922 } else { 923 assert(k->is_objArray_klass(), "Must be"); 924 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 925 assert(element_klass != NULL, "Must have an element klass"); 926 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 927 } 928 assert(comp_mirror() != NULL, "must have a mirror"); 929 930 // Two-way link between the array klass and its component mirror: 931 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 932 set_component_mirror(mirror(), comp_mirror()); 933 // See below for ordering dependencies between field array_klass in component mirror 934 // and java_mirror in this klass. 935 } else { 936 assert(k->is_instance_klass(), "Must be"); 937 938 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 939 if (HAS_PENDING_EXCEPTION) { 940 // If any of the fields throws an exception like OOM remove the klass field 941 // from the mirror so GC doesn't follow it after the klass has been deallocated. 942 // This mirror looks like a primitive type, which logically it is because it 943 // it represents no class. 944 java_lang_Class::set_klass(mirror(), NULL); 945 return; 946 } 947 } 948 949 // set the classLoader field in the java_lang_Class instance 950 assert(class_loader() == k->class_loader(), "should be same"); 951 set_class_loader(mirror(), class_loader()); 952 953 // Setup indirection from klass->mirror 954 // after any exceptions can happen during allocations. 955 k->set_java_mirror(mirror); 956 957 // Set the module field in the java_lang_Class instance. This must be done 958 // after the mirror is set. 959 set_mirror_module_field(k, mirror, module, THREAD); 960 961 if (comp_mirror() != NULL) { 962 // Set after k->java_mirror() is published, because compiled code running 963 // concurrently doesn't expect a k to have a null java_mirror. 964 release_set_array_klass(comp_mirror(), k); 965 } 966 } else { 967 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 968 fixup_mirror_list()->push(k); 969 } 970 } 971 972 #if INCLUDE_CDS_JAVA_HEAP 973 // Clears mirror fields. Static final fields with initial values are reloaded 974 // from constant pool. The object identity hash is in the object header and is 975 // not affected. 976 class ResetMirrorField: public FieldClosure { 977 private: 978 Handle _m; 979 980 public: 981 ResetMirrorField(Handle mirror) : _m(mirror) {} 982 983 void do_field(fieldDescriptor* fd) { 984 assert(DumpSharedSpaces, "dump time only"); 985 assert(_m.not_null(), "Mirror cannot be NULL"); 986 987 if (fd->is_static() && fd->has_initial_value()) { 988 initialize_static_field(fd, _m, Thread::current()); 989 return; 990 } 991 992 BasicType ft = fd->field_type(); 993 switch (ft) { 994 case T_BYTE: 995 _m()->byte_field_put(fd->offset(), 0); 996 break; 997 case T_CHAR: 998 _m()->char_field_put(fd->offset(), 0); 999 break; 1000 case T_DOUBLE: 1001 _m()->double_field_put(fd->offset(), 0); 1002 break; 1003 case T_FLOAT: 1004 _m()->float_field_put(fd->offset(), 0); 1005 break; 1006 case T_INT: 1007 _m()->int_field_put(fd->offset(), 0); 1008 break; 1009 case T_LONG: 1010 _m()->long_field_put(fd->offset(), 0); 1011 break; 1012 case T_SHORT: 1013 _m()->short_field_put(fd->offset(), 0); 1014 break; 1015 case T_BOOLEAN: 1016 _m()->bool_field_put(fd->offset(), false); 1017 break; 1018 case T_ARRAY: 1019 case T_OBJECT: { 1020 // It might be useful to cache the String field, but 1021 // for now just clear out any reference field 1022 oop o = _m()->obj_field(fd->offset()); 1023 _m()->obj_field_put(fd->offset(), NULL); 1024 break; 1025 } 1026 default: 1027 ShouldNotReachHere(); 1028 break; 1029 } 1030 } 1031 }; 1032 1033 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1034 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1035 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1036 1037 for (int t = 0; t <= T_VOID; t++) { 1038 oop m = Universe::_mirrors[t]; 1039 if (m != NULL) { 1040 // Update the field at _array_klass_offset to point to the relocated array klass. 1041 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD); 1042 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1043 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1044 if (ak != NULL) { 1045 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1046 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1047 } 1048 1049 // Clear the fields. Just to be safe 1050 Klass *k = m->klass(); 1051 Handle archived_mirror_h(THREAD, archived_m); 1052 ResetMirrorField reset(archived_mirror_h); 1053 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1054 1055 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1056 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1057 1058 Universe::_mirrors[t] = archived_m; 1059 } 1060 } 1061 1062 assert(Universe::_mirrors[T_INT] != NULL && 1063 Universe::_mirrors[T_FLOAT] != NULL && 1064 Universe::_mirrors[T_DOUBLE] != NULL && 1065 Universe::_mirrors[T_BYTE] != NULL && 1066 Universe::_mirrors[T_BOOLEAN] != NULL && 1067 Universe::_mirrors[T_CHAR] != NULL && 1068 Universe::_mirrors[T_LONG] != NULL && 1069 Universe::_mirrors[T_SHORT] != NULL && 1070 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1071 1072 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1073 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1074 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1075 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1076 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1077 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1078 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1079 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1080 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1081 } 1082 1083 // 1084 // After the mirror object is successfully archived, the archived 1085 // klass is set with _has_archived_raw_mirror flag. 1086 // 1087 // The _has_archived_raw_mirror flag is cleared at runtime when the 1088 // archived mirror is restored. If archived java heap data cannot 1089 // be used at runtime, new mirror object is created for the shared 1090 // class. The _has_archived_raw_mirror is cleared also during the process. 1091 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1092 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1093 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1094 1095 // Mirror is already archived 1096 if (k->has_raw_archived_mirror()) { 1097 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1098 return k->archived_java_mirror_raw(); 1099 } 1100 1101 // No mirror 1102 oop mirror = k->java_mirror(); 1103 if (mirror == NULL) { 1104 return NULL; 1105 } 1106 1107 if (k->is_instance_klass()) { 1108 InstanceKlass *ik = InstanceKlass::cast(k); 1109 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1110 "class with signer cannot be supported"); 1111 1112 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1113 ik->is_shared_app_class())) { 1114 // Archiving mirror for classes from non-builtin loaders is not 1115 // supported. Clear the _java_mirror within the archived class. 1116 k->set_java_mirror_handle(NULL); 1117 return NULL; 1118 } 1119 } 1120 1121 // Now start archiving the mirror object 1122 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD); 1123 if (archived_mirror == NULL) { 1124 return NULL; 1125 } 1126 1127 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1128 if (archived_mirror == NULL) { 1129 return NULL; 1130 } 1131 1132 k->set_archived_java_mirror_raw(archived_mirror); 1133 1134 k->set_has_raw_archived_mirror(); 1135 1136 ResourceMark rm; 1137 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1138 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1139 1140 return archived_mirror; 1141 } 1142 1143 // The process is based on create_mirror(). 1144 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1145 oop archived_mirror, 1146 Thread *THREAD) { 1147 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1148 // to archived metadata and objects below. 1149 Klass *c = archived_mirror->klass(); 1150 Handle archived_mirror_h(THREAD, archived_mirror); 1151 ResetMirrorField reset(archived_mirror_h); 1152 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1153 1154 if (k->is_array_klass()) { 1155 oop archived_comp_mirror; 1156 if (k->is_typeArray_klass()) { 1157 // The primitive type mirrors are already archived. Get the archived mirror. 1158 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1159 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror); 1160 assert(archived_comp_mirror != NULL, "Must be"); 1161 } else { 1162 assert(k->is_objArray_klass(), "Must be"); 1163 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1164 assert(element_klass != NULL, "Must have an element klass"); 1165 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1166 if (archived_comp_mirror == NULL) { 1167 return NULL; 1168 } 1169 } 1170 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1171 } else { 1172 assert(k->is_instance_klass(), "Must be"); 1173 1174 // Reset local static fields in the mirror 1175 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1176 1177 java_lang_Class:set_init_lock(archived_mirror, NULL); 1178 1179 set_protection_domain(archived_mirror, NULL); 1180 } 1181 1182 // clear class loader and mirror_module_field 1183 set_class_loader(archived_mirror, NULL); 1184 set_module(archived_mirror, NULL); 1185 1186 // The archived mirror's field at _klass_offset is still pointing to the original 1187 // klass. Updated the field in the archived mirror to point to the relocated 1188 // klass in the archive. 1189 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1190 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1191 p2i(as_Klass(mirror)), p2i(reloc_k)); 1192 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1193 1194 // The field at _array_klass_offset is pointing to the original one dimension 1195 // higher array klass if exists. Relocate the pointer. 1196 Klass *arr = array_klass_acquire(mirror); 1197 if (arr != NULL) { 1198 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1199 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1200 p2i(arr), p2i(reloc_arr)); 1201 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1202 } 1203 return archived_mirror; 1204 } 1205 1206 // After the archived mirror object is restored, the shared klass' 1207 // _has_raw_archived_mirror flag is cleared 1208 void java_lang_Class::restore_archived_mirror(Klass *k, Handle mirror, 1209 Handle class_loader, Handle module, 1210 Handle protection_domain, TRAPS) { 1211 1212 // The java.lang.Class field offsets were archived and reloaded from archive. 1213 // No need to put classes on the fixup_mirror_list before java.lang.Class 1214 // is loaded. 1215 1216 if (!k->is_array_klass()) { 1217 // - local static final fields with initial values were initialized at dump time 1218 1219 // create the init_lock 1220 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 1221 set_init_lock(mirror(), r); 1222 1223 if (protection_domain.not_null()) { 1224 set_protection_domain(mirror(), protection_domain()); 1225 } 1226 } 1227 1228 assert(class_loader() == k->class_loader(), "should be same"); 1229 if (class_loader.not_null()) { 1230 set_class_loader(mirror(), class_loader()); 1231 } 1232 1233 k->set_java_mirror(mirror); 1234 k->clear_has_raw_archived_mirror(); 1235 1236 set_mirror_module_field(k, mirror, module, THREAD); 1237 1238 ResourceMark rm; 1239 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1240 } 1241 #endif // INCLUDE_CDS_JAVA_HEAP 1242 1243 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1244 assert(_module_offset != 0, "must have been computed already"); 1245 java_lang_Class::set_module(k->java_mirror(), module()); 1246 } 1247 1248 int java_lang_Class::oop_size(oop java_class) { 1249 assert(_oop_size_offset != 0, "must be set"); 1250 int size = java_class->int_field(_oop_size_offset); 1251 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1252 return size; 1253 } 1254 1255 void java_lang_Class::set_oop_size(oop java_class, int size) { 1256 assert(_oop_size_offset != 0, "must be set"); 1257 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1258 java_class->int_field_put(_oop_size_offset, size); 1259 } 1260 1261 int java_lang_Class::static_oop_field_count(oop java_class) { 1262 assert(_static_oop_field_count_offset != 0, "must be set"); 1263 return java_class->int_field(_static_oop_field_count_offset); 1264 } 1265 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1266 assert(_static_oop_field_count_offset != 0, "must be set"); 1267 java_class->int_field_put(_static_oop_field_count_offset, size); 1268 } 1269 1270 oop java_lang_Class::protection_domain(oop java_class) { 1271 assert(_protection_domain_offset != 0, "must be set"); 1272 return java_class->obj_field(_protection_domain_offset); 1273 } 1274 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1275 assert(_protection_domain_offset != 0, "must be set"); 1276 java_class->obj_field_put(_protection_domain_offset, pd); 1277 } 1278 1279 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1280 assert(_component_mirror_offset != 0, "must be set"); 1281 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1282 } 1283 oop java_lang_Class::component_mirror(oop java_class) { 1284 assert(_component_mirror_offset != 0, "must be set"); 1285 return java_class->obj_field(_component_mirror_offset); 1286 } 1287 1288 oop java_lang_Class::init_lock(oop java_class) { 1289 assert(_init_lock_offset != 0, "must be set"); 1290 return java_class->obj_field(_init_lock_offset); 1291 } 1292 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1293 assert(_init_lock_offset != 0, "must be set"); 1294 java_class->obj_field_put(_init_lock_offset, init_lock); 1295 } 1296 1297 objArrayOop java_lang_Class::signers(oop java_class) { 1298 assert(_signers_offset != 0, "must be set"); 1299 return (objArrayOop)java_class->obj_field(_signers_offset); 1300 } 1301 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1302 assert(_signers_offset != 0, "must be set"); 1303 java_class->obj_field_put(_signers_offset, (oop)signers); 1304 } 1305 1306 1307 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1308 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1309 if (_class_loader_offset != 0) { 1310 java_class->obj_field_put(_class_loader_offset, loader); 1311 } 1312 } 1313 1314 oop java_lang_Class::class_loader(oop java_class) { 1315 assert(_class_loader_offset != 0, "must be set"); 1316 return java_class->obj_field(_class_loader_offset); 1317 } 1318 1319 oop java_lang_Class::module(oop java_class) { 1320 assert(_module_offset != 0, "must be set"); 1321 return java_class->obj_field(_module_offset); 1322 } 1323 1324 void java_lang_Class::set_module(oop java_class, oop module) { 1325 assert(_module_offset != 0, "must be set"); 1326 java_class->obj_field_put(_module_offset, module); 1327 } 1328 1329 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1330 // This should be improved by adding a field at the Java level or by 1331 // introducing a new VM klass (see comment in ClassFileParser) 1332 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1333 if (type != T_VOID) { 1334 Klass* aklass = Universe::typeArrayKlassObj(type); 1335 assert(aklass != NULL, "correct bootstrap"); 1336 release_set_array_klass(java_class, aklass); 1337 } 1338 #ifdef ASSERT 1339 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1340 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1341 #endif 1342 return java_class; 1343 } 1344 1345 1346 Klass* java_lang_Class::as_Klass(oop java_class) { 1347 //%note memory_2 1348 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1349 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1350 assert(k == NULL || k->is_klass(), "type check"); 1351 return k; 1352 } 1353 1354 1355 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1356 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1357 java_class->metadata_field_put(_klass_offset, klass); 1358 } 1359 1360 1361 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1362 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1363 Symbol* name = NULL; 1364 bool is_instance = false; 1365 if (is_primitive(java_class)) { 1366 name = vmSymbols::type_signature(primitive_type(java_class)); 1367 } else { 1368 Klass* k = as_Klass(java_class); 1369 is_instance = k->is_instance_klass(); 1370 name = k->name(); 1371 } 1372 if (name == NULL) { 1373 st->print("<null>"); 1374 return; 1375 } 1376 if (is_instance) st->print("L"); 1377 st->write((char*) name->base(), (int) name->utf8_length()); 1378 if (is_instance) st->print(";"); 1379 } 1380 1381 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1382 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1383 Symbol* name; 1384 if (is_primitive(java_class)) { 1385 name = vmSymbols::type_signature(primitive_type(java_class)); 1386 // Because this can create a new symbol, the caller has to decrement 1387 // the refcount, so make adjustment here and below for symbols returned 1388 // that are not created or incremented due to a successful lookup. 1389 name->increment_refcount(); 1390 } else { 1391 Klass* k = as_Klass(java_class); 1392 if (!k->is_instance_klass()) { 1393 name = k->name(); 1394 name->increment_refcount(); 1395 } else { 1396 ResourceMark rm; 1397 const char* sigstr = k->signature_name(); 1398 int siglen = (int) strlen(sigstr); 1399 if (!intern_if_not_found) { 1400 name = SymbolTable::probe(sigstr, siglen); 1401 } else { 1402 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1403 } 1404 } 1405 } 1406 return name; 1407 } 1408 1409 // Returns the Java name for this Java mirror (Resource allocated) 1410 // See Klass::external_name(). 1411 // For primitive type Java mirrors, its type name is returned. 1412 const char* java_lang_Class::as_external_name(oop java_class) { 1413 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1414 const char* name = NULL; 1415 if (is_primitive(java_class)) { 1416 name = type2name(primitive_type(java_class)); 1417 } else { 1418 name = as_Klass(java_class)->external_name(); 1419 } 1420 if (name == NULL) { 1421 name = "<null>"; 1422 } 1423 return name; 1424 } 1425 1426 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1427 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1428 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1429 return k; 1430 } 1431 1432 1433 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1434 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1435 java_class->release_metadata_field_put(_array_klass_offset, klass); 1436 } 1437 1438 1439 bool java_lang_Class::is_primitive(oop java_class) { 1440 // should assert: 1441 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1442 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1443 1444 #ifdef ASSERT 1445 if (is_primitive) { 1446 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1447 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1448 "Should be either the T_VOID primitive or a java primitive"); 1449 } 1450 #endif 1451 1452 return is_primitive; 1453 } 1454 1455 1456 BasicType java_lang_Class::primitive_type(oop java_class) { 1457 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1458 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1459 BasicType type = T_VOID; 1460 if (ak != NULL) { 1461 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1462 type = ArrayKlass::cast(ak)->element_type(); 1463 } else { 1464 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1465 } 1466 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1467 return type; 1468 } 1469 1470 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1471 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1472 if (is_primitive(java_class)) { 1473 if (reference_klass != NULL) 1474 (*reference_klass) = NULL; 1475 return primitive_type(java_class); 1476 } else { 1477 if (reference_klass != NULL) 1478 (*reference_klass) = as_Klass(java_class); 1479 return T_OBJECT; 1480 } 1481 } 1482 1483 1484 oop java_lang_Class::primitive_mirror(BasicType t) { 1485 oop mirror = Universe::java_mirror(t); 1486 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1487 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1488 return mirror; 1489 } 1490 1491 bool java_lang_Class::offsets_computed = false; 1492 int java_lang_Class::classRedefinedCount_offset = -1; 1493 1494 #define CLASS_FIELDS_DO(macro) \ 1495 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1496 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1497 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1498 macro(_module_offset, k, "module", module_signature, false) 1499 1500 void java_lang_Class::compute_offsets() { 1501 if (offsets_computed) { 1502 return; 1503 } 1504 1505 offsets_computed = true; 1506 1507 InstanceKlass* k = SystemDictionary::Class_klass(); 1508 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1509 1510 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1511 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1512 // GC treats them the same. 1513 _init_lock_offset = _component_mirror_offset; 1514 1515 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1516 } 1517 1518 #if INCLUDE_CDS 1519 void java_lang_Class::serialize(SerializeClosure* f) { 1520 f->do_u4((u4*)&offsets_computed); 1521 f->do_u4((u4*)&_init_lock_offset); 1522 1523 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1524 1525 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1526 } 1527 #endif 1528 1529 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1530 if (classRedefinedCount_offset == -1) { 1531 // If we don't have an offset for it then just return -1 as a marker. 1532 return -1; 1533 } 1534 1535 return the_class_mirror->int_field(classRedefinedCount_offset); 1536 } 1537 1538 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1539 if (classRedefinedCount_offset == -1) { 1540 // If we don't have an offset for it then nothing to set. 1541 return; 1542 } 1543 1544 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1545 } 1546 1547 1548 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1549 // platform thread structure, and a eetop offset which was used for thread 1550 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1551 // merged, so in the HotSpot VM we just use the eetop field for the thread 1552 // instead of the privateInfo_offset. 1553 // 1554 // Note: The stackSize field is only present starting in 1.4. 1555 1556 int java_lang_Thread::_name_offset = 0; 1557 int java_lang_Thread::_group_offset = 0; 1558 int java_lang_Thread::_contextClassLoader_offset = 0; 1559 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1560 int java_lang_Thread::_priority_offset = 0; 1561 int java_lang_Thread::_eetop_offset = 0; 1562 int java_lang_Thread::_daemon_offset = 0; 1563 int java_lang_Thread::_stillborn_offset = 0; 1564 int java_lang_Thread::_stackSize_offset = 0; 1565 int java_lang_Thread::_tid_offset = 0; 1566 int java_lang_Thread::_thread_status_offset = 0; 1567 int java_lang_Thread::_park_blocker_offset = 0; 1568 int java_lang_Thread::_park_event_offset = 0 ; 1569 1570 #define THREAD_FIELDS_DO(macro) \ 1571 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1572 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1573 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1574 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1575 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1576 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1577 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1578 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1579 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1580 macro(_tid_offset, k, "tid", long_signature, false); \ 1581 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1582 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1583 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1584 1585 void java_lang_Thread::compute_offsets() { 1586 assert(_group_offset == 0, "offsets should be initialized only once"); 1587 1588 InstanceKlass* k = SystemDictionary::Thread_klass(); 1589 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1590 } 1591 1592 #if INCLUDE_CDS 1593 void java_lang_Thread::serialize(SerializeClosure* f) { 1594 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1595 } 1596 #endif 1597 1598 JavaThread* java_lang_Thread::thread(oop java_thread) { 1599 return (JavaThread*)java_thread->address_field(_eetop_offset); 1600 } 1601 1602 1603 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1604 java_thread->address_field_put(_eetop_offset, (address)thread); 1605 } 1606 1607 1608 oop java_lang_Thread::name(oop java_thread) { 1609 return java_thread->obj_field(_name_offset); 1610 } 1611 1612 1613 void java_lang_Thread::set_name(oop java_thread, oop name) { 1614 java_thread->obj_field_put(_name_offset, name); 1615 } 1616 1617 1618 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1619 return (ThreadPriority)java_thread->int_field(_priority_offset); 1620 } 1621 1622 1623 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1624 java_thread->int_field_put(_priority_offset, priority); 1625 } 1626 1627 1628 oop java_lang_Thread::threadGroup(oop java_thread) { 1629 return java_thread->obj_field(_group_offset); 1630 } 1631 1632 1633 bool java_lang_Thread::is_stillborn(oop java_thread) { 1634 return java_thread->bool_field(_stillborn_offset) != 0; 1635 } 1636 1637 1638 // We never have reason to turn the stillborn bit off 1639 void java_lang_Thread::set_stillborn(oop java_thread) { 1640 java_thread->bool_field_put(_stillborn_offset, true); 1641 } 1642 1643 1644 bool java_lang_Thread::is_alive(oop java_thread) { 1645 JavaThread* thr = java_lang_Thread::thread(java_thread); 1646 return (thr != NULL); 1647 } 1648 1649 1650 bool java_lang_Thread::is_daemon(oop java_thread) { 1651 return java_thread->bool_field(_daemon_offset) != 0; 1652 } 1653 1654 1655 void java_lang_Thread::set_daemon(oop java_thread) { 1656 java_thread->bool_field_put(_daemon_offset, true); 1657 } 1658 1659 oop java_lang_Thread::context_class_loader(oop java_thread) { 1660 return java_thread->obj_field(_contextClassLoader_offset); 1661 } 1662 1663 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1664 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1665 } 1666 1667 1668 jlong java_lang_Thread::stackSize(oop java_thread) { 1669 if (_stackSize_offset > 0) { 1670 return java_thread->long_field(_stackSize_offset); 1671 } else { 1672 return 0; 1673 } 1674 } 1675 1676 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1677 void java_lang_Thread::set_thread_status(oop java_thread, 1678 java_lang_Thread::ThreadStatus status) { 1679 // The threadStatus is only present starting in 1.5 1680 if (_thread_status_offset > 0) { 1681 java_thread->int_field_put(_thread_status_offset, status); 1682 } 1683 } 1684 1685 // Read thread status value from threadStatus field in java.lang.Thread java class. 1686 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1687 // Make sure the caller is operating on behalf of the VM or is 1688 // running VM code (state == _thread_in_vm). 1689 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1690 JavaThread::current()->thread_state() == _thread_in_vm, 1691 "Java Thread is not running in vm"); 1692 // The threadStatus is only present starting in 1.5 1693 if (_thread_status_offset > 0) { 1694 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1695 } else { 1696 // All we can easily figure out is if it is alive, but that is 1697 // enough info for a valid unknown status. 1698 // These aren't restricted to valid set ThreadStatus values, so 1699 // use JVMTI values and cast. 1700 JavaThread* thr = java_lang_Thread::thread(java_thread); 1701 if (thr == NULL) { 1702 // the thread hasn't run yet or is in the process of exiting 1703 return NEW; 1704 } 1705 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1706 } 1707 } 1708 1709 1710 jlong java_lang_Thread::thread_id(oop java_thread) { 1711 // The thread ID field is only present starting in 1.5 1712 if (_tid_offset > 0) { 1713 return java_thread->long_field(_tid_offset); 1714 } else { 1715 return 0; 1716 } 1717 } 1718 1719 oop java_lang_Thread::park_blocker(oop java_thread) { 1720 assert(JDK_Version::current().supports_thread_park_blocker() && 1721 _park_blocker_offset != 0, "Must support parkBlocker field"); 1722 1723 if (_park_blocker_offset > 0) { 1724 return java_thread->obj_field(_park_blocker_offset); 1725 } 1726 1727 return NULL; 1728 } 1729 1730 jlong java_lang_Thread::park_event(oop java_thread) { 1731 if (_park_event_offset > 0) { 1732 return java_thread->long_field(_park_event_offset); 1733 } 1734 return 0; 1735 } 1736 1737 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1738 if (_park_event_offset > 0) { 1739 java_thread->long_field_put(_park_event_offset, ptr); 1740 return true; 1741 } 1742 return false; 1743 } 1744 1745 1746 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1747 assert(_thread_status_offset != 0, "Must have thread status"); 1748 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1749 switch (status) { 1750 case NEW : return "NEW"; 1751 case RUNNABLE : return "RUNNABLE"; 1752 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1753 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1754 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1755 case PARKED : return "WAITING (parking)"; 1756 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1757 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1758 case TERMINATED : return "TERMINATED"; 1759 default : return "UNKNOWN"; 1760 }; 1761 } 1762 int java_lang_ThreadGroup::_parent_offset = 0; 1763 int java_lang_ThreadGroup::_name_offset = 0; 1764 int java_lang_ThreadGroup::_threads_offset = 0; 1765 int java_lang_ThreadGroup::_groups_offset = 0; 1766 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1767 int java_lang_ThreadGroup::_destroyed_offset = 0; 1768 int java_lang_ThreadGroup::_daemon_offset = 0; 1769 int java_lang_ThreadGroup::_nthreads_offset = 0; 1770 int java_lang_ThreadGroup::_ngroups_offset = 0; 1771 1772 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1773 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1774 return java_thread_group->obj_field(_parent_offset); 1775 } 1776 1777 // ("name as oop" accessor is not necessary) 1778 1779 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1780 oop name = java_thread_group->obj_field(_name_offset); 1781 // ThreadGroup.name can be null 1782 if (name != NULL) { 1783 return java_lang_String::as_utf8_string(name); 1784 } 1785 return NULL; 1786 } 1787 1788 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1789 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1790 return java_thread_group->int_field(_nthreads_offset); 1791 } 1792 1793 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1794 oop threads = java_thread_group->obj_field(_threads_offset); 1795 assert(threads != NULL, "threadgroups should have threads"); 1796 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1797 return objArrayOop(threads); 1798 } 1799 1800 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1801 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1802 return java_thread_group->int_field(_ngroups_offset); 1803 } 1804 1805 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1806 oop groups = java_thread_group->obj_field(_groups_offset); 1807 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1808 return objArrayOop(groups); 1809 } 1810 1811 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1812 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1813 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1814 } 1815 1816 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1817 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1818 return java_thread_group->bool_field(_destroyed_offset) != 0; 1819 } 1820 1821 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1822 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1823 return java_thread_group->bool_field(_daemon_offset) != 0; 1824 } 1825 1826 #define THREADGROUP_FIELDS_DO(macro) \ 1827 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1828 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1829 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1830 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1831 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1832 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1833 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1834 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1835 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1836 1837 void java_lang_ThreadGroup::compute_offsets() { 1838 assert(_parent_offset == 0, "offsets should be initialized only once"); 1839 1840 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1841 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1842 } 1843 1844 #if INCLUDE_CDS 1845 void java_lang_ThreadGroup::serialize(SerializeClosure* f) { 1846 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1847 } 1848 #endif 1849 1850 #define THROWABLE_FIELDS_DO(macro) \ 1851 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1852 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1853 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1854 macro(depth_offset, k, "depth", int_signature, false); \ 1855 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1856 1857 void java_lang_Throwable::compute_offsets() { 1858 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1859 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1860 } 1861 1862 #if INCLUDE_CDS 1863 void java_lang_Throwable::serialize(SerializeClosure* f) { 1864 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1865 } 1866 #endif 1867 1868 oop java_lang_Throwable::unassigned_stacktrace() { 1869 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1870 oop base = ik->static_field_base_raw(); 1871 return base->obj_field(static_unassigned_stacktrace_offset); 1872 } 1873 1874 oop java_lang_Throwable::backtrace(oop throwable) { 1875 return throwable->obj_field_acquire(backtrace_offset); 1876 } 1877 1878 1879 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1880 throwable->release_obj_field_put(backtrace_offset, value); 1881 } 1882 1883 int java_lang_Throwable::depth(oop throwable) { 1884 return throwable->int_field(depth_offset); 1885 } 1886 1887 void java_lang_Throwable::set_depth(oop throwable, int value) { 1888 throwable->int_field_put(depth_offset, value); 1889 } 1890 1891 oop java_lang_Throwable::message(oop throwable) { 1892 return throwable->obj_field(detailMessage_offset); 1893 } 1894 1895 1896 // Return Symbol for detailed_message or NULL 1897 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1898 PRESERVE_EXCEPTION_MARK; // Keep original exception 1899 oop detailed_message = java_lang_Throwable::message(throwable); 1900 if (detailed_message != NULL) { 1901 return java_lang_String::as_symbol(detailed_message, THREAD); 1902 } 1903 return NULL; 1904 } 1905 1906 void java_lang_Throwable::set_message(oop throwable, oop value) { 1907 throwable->obj_field_put(detailMessage_offset, value); 1908 } 1909 1910 1911 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1912 throwable->obj_field_put(stackTrace_offset, st_element_array); 1913 } 1914 1915 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1916 set_stacktrace(throwable, NULL); 1917 } 1918 1919 1920 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1921 ResourceMark rm; 1922 Klass* k = throwable->klass(); 1923 assert(k != NULL, "just checking"); 1924 st->print("%s", k->external_name()); 1925 oop msg = message(throwable); 1926 if (msg != NULL) { 1927 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1928 } 1929 } 1930 1931 // After this many redefines, the stack trace is unreliable. 1932 const int MAX_VERSION = USHRT_MAX; 1933 1934 static inline bool version_matches(Method* method, int version) { 1935 assert(version < MAX_VERSION, "version is too big"); 1936 return method != NULL && (method->constants()->version() == version); 1937 } 1938 1939 1940 // This class provides a simple wrapper over the internal structure of 1941 // exception backtrace to insulate users of the backtrace from needing 1942 // to know what it looks like. 1943 class BacktraceBuilder: public StackObj { 1944 friend class BacktraceIterator; 1945 private: 1946 Handle _backtrace; 1947 objArrayOop _head; 1948 typeArrayOop _methods; 1949 typeArrayOop _bcis; 1950 objArrayOop _mirrors; 1951 typeArrayOop _names; // needed to insulate method name against redefinition 1952 int _index; 1953 NoSafepointVerifier _nsv; 1954 1955 enum { 1956 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1957 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1958 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1959 trace_names_offset = java_lang_Throwable::trace_names_offset, 1960 trace_next_offset = java_lang_Throwable::trace_next_offset, 1961 trace_size = java_lang_Throwable::trace_size, 1962 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1963 }; 1964 1965 // get info out of chunks 1966 static typeArrayOop get_methods(objArrayHandle chunk) { 1967 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1968 assert(methods != NULL, "method array should be initialized in backtrace"); 1969 return methods; 1970 } 1971 static typeArrayOop get_bcis(objArrayHandle chunk) { 1972 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1973 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1974 return bcis; 1975 } 1976 static objArrayOop get_mirrors(objArrayHandle chunk) { 1977 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1978 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1979 return mirrors; 1980 } 1981 static typeArrayOop get_names(objArrayHandle chunk) { 1982 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1983 assert(names != NULL, "names array should be initialized in backtrace"); 1984 return names; 1985 } 1986 1987 public: 1988 1989 // constructor for new backtrace 1990 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1991 expand(CHECK); 1992 _backtrace = Handle(THREAD, _head); 1993 _index = 0; 1994 } 1995 1996 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1997 _methods = get_methods(backtrace); 1998 _bcis = get_bcis(backtrace); 1999 _mirrors = get_mirrors(backtrace); 2000 _names = get_names(backtrace); 2001 assert(_methods->length() == _bcis->length() && 2002 _methods->length() == _mirrors->length() && 2003 _mirrors->length() == _names->length(), 2004 "method and source information arrays should match"); 2005 2006 // head is the preallocated backtrace 2007 _head = backtrace(); 2008 _backtrace = Handle(thread, _head); 2009 _index = 0; 2010 } 2011 2012 void expand(TRAPS) { 2013 objArrayHandle old_head(THREAD, _head); 2014 PauseNoSafepointVerifier pnsv(&_nsv); 2015 2016 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2017 objArrayHandle new_head(THREAD, head); 2018 2019 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2020 typeArrayHandle new_methods(THREAD, methods); 2021 2022 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2023 typeArrayHandle new_bcis(THREAD, bcis); 2024 2025 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2026 objArrayHandle new_mirrors(THREAD, mirrors); 2027 2028 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2029 typeArrayHandle new_names(THREAD, names); 2030 2031 if (!old_head.is_null()) { 2032 old_head->obj_at_put(trace_next_offset, new_head()); 2033 } 2034 new_head->obj_at_put(trace_methods_offset, new_methods()); 2035 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2036 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2037 new_head->obj_at_put(trace_names_offset, new_names()); 2038 2039 _head = new_head(); 2040 _methods = new_methods(); 2041 _bcis = new_bcis(); 2042 _mirrors = new_mirrors(); 2043 _names = new_names(); 2044 _index = 0; 2045 } 2046 2047 oop backtrace() { 2048 return _backtrace(); 2049 } 2050 2051 inline void push(Method* method, int bci, TRAPS) { 2052 // Smear the -1 bci to 0 since the array only holds unsigned 2053 // shorts. The later line number lookup would just smear the -1 2054 // to a 0 even if it could be recorded. 2055 if (bci == SynchronizationEntryBCI) bci = 0; 2056 2057 if (_index >= trace_chunk_size) { 2058 methodHandle mhandle(THREAD, method); 2059 expand(CHECK); 2060 method = mhandle(); 2061 } 2062 2063 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2064 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2065 2066 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2067 // klass owning the symbols alive so their refcounts aren't decremented. 2068 Symbol* name = method->name(); 2069 _names->symbol_at_put(_index, name); 2070 2071 // We need to save the mirrors in the backtrace to keep the class 2072 // from being unloaded while we still have this stack trace. 2073 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2074 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2075 _index++; 2076 } 2077 2078 }; 2079 2080 struct BacktraceElement : public StackObj { 2081 int _method_id; 2082 int _bci; 2083 int _version; 2084 Symbol* _name; 2085 Handle _mirror; 2086 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2087 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 2088 }; 2089 2090 class BacktraceIterator : public StackObj { 2091 int _index; 2092 objArrayHandle _result; 2093 objArrayHandle _mirrors; 2094 typeArrayHandle _methods; 2095 typeArrayHandle _bcis; 2096 typeArrayHandle _names; 2097 2098 void init(objArrayHandle result, Thread* thread) { 2099 // Get method id, bci, version and mirror from chunk 2100 _result = result; 2101 if (_result.not_null()) { 2102 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2103 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2104 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2105 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2106 _index = 0; 2107 } 2108 } 2109 public: 2110 BacktraceIterator(objArrayHandle result, Thread* thread) { 2111 init(result, thread); 2112 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2113 } 2114 2115 BacktraceElement next(Thread* thread) { 2116 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2117 _methods->ushort_at(_index), 2118 Backtrace::version_at(_bcis->int_at(_index)), 2119 Backtrace::bci_at(_bcis->int_at(_index)), 2120 _names->symbol_at(_index)); 2121 _index++; 2122 2123 if (_index >= java_lang_Throwable::trace_chunk_size) { 2124 int next_offset = java_lang_Throwable::trace_next_offset; 2125 // Get next chunk 2126 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2127 init(result, thread); 2128 } 2129 return e; 2130 } 2131 2132 bool repeat() { 2133 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2134 } 2135 }; 2136 2137 2138 // Print stack trace element to resource allocated buffer 2139 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2140 int version, int bci, Symbol* name) { 2141 ResourceMark rm; 2142 2143 // Get strings and string lengths 2144 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2145 const char* klass_name = holder->external_name(); 2146 int buf_len = (int)strlen(klass_name); 2147 2148 char* method_name = name->as_C_string(); 2149 buf_len += (int)strlen(method_name); 2150 2151 char* source_file_name = NULL; 2152 Symbol* source = Backtrace::get_source_file_name(holder, version); 2153 if (source != NULL) { 2154 source_file_name = source->as_C_string(); 2155 buf_len += (int)strlen(source_file_name); 2156 } 2157 2158 char *module_name = NULL, *module_version = NULL; 2159 ModuleEntry* module = holder->module(); 2160 if (module->is_named()) { 2161 module_name = module->name()->as_C_string(); 2162 buf_len += (int)strlen(module_name); 2163 if (module->version() != NULL) { 2164 module_version = module->version()->as_C_string(); 2165 buf_len += (int)strlen(module_version); 2166 } 2167 } 2168 2169 // Allocate temporary buffer with extra space for formatting and line number 2170 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2171 2172 // Print stack trace line in buffer 2173 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2174 2175 // Print module information 2176 if (module_name != NULL) { 2177 if (module_version != NULL) { 2178 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2179 } else { 2180 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2181 } 2182 } 2183 2184 // The method can be NULL if the requested class version is gone 2185 Method* method = holder->method_with_orig_idnum(method_id, version); 2186 if (!version_matches(method, version)) { 2187 strcat(buf, "Redefined)"); 2188 } else { 2189 int line_number = Backtrace::get_line_number(method, bci); 2190 if (line_number == -2) { 2191 strcat(buf, "Native Method)"); 2192 } else { 2193 if (source_file_name != NULL && (line_number != -1)) { 2194 // Sourcename and linenumber 2195 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2196 } else if (source_file_name != NULL) { 2197 // Just sourcename 2198 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2199 } else { 2200 // Neither sourcename nor linenumber 2201 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2202 } 2203 CompiledMethod* nm = method->code(); 2204 if (WizardMode && nm != NULL) { 2205 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2206 } 2207 } 2208 } 2209 2210 st->print_cr("%s", buf); 2211 } 2212 2213 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2214 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2215 int method_id = method->orig_method_idnum(); 2216 int version = method->constants()->version(); 2217 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2218 } 2219 2220 /** 2221 * Print the throwable message and its stack trace plus all causes by walking the 2222 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2223 */ 2224 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2225 // First, print the message. 2226 print(throwable(), st); 2227 st->cr(); 2228 2229 // Now print the stack trace. 2230 Thread* THREAD = Thread::current(); 2231 while (throwable.not_null()) { 2232 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2233 if (result.is_null()) { 2234 st->print_raw_cr("\t<<no stack trace available>>"); 2235 return; 2236 } 2237 BacktraceIterator iter(result, THREAD); 2238 2239 while (iter.repeat()) { 2240 BacktraceElement bte = iter.next(THREAD); 2241 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2242 } 2243 { 2244 // Call getCause() which doesn't necessarily return the _cause field. 2245 EXCEPTION_MARK; 2246 JavaValue cause(T_OBJECT); 2247 JavaCalls::call_virtual(&cause, 2248 throwable, 2249 throwable->klass(), 2250 vmSymbols::getCause_name(), 2251 vmSymbols::void_throwable_signature(), 2252 THREAD); 2253 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2254 if (HAS_PENDING_EXCEPTION) { 2255 CLEAR_PENDING_EXCEPTION; 2256 throwable = Handle(); 2257 } else { 2258 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2259 if (throwable.not_null()) { 2260 st->print("Caused by: "); 2261 print(throwable(), st); 2262 st->cr(); 2263 } 2264 } 2265 } 2266 } 2267 } 2268 2269 /** 2270 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2271 */ 2272 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2273 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2274 JavaValue result(T_VOID); 2275 JavaCalls::call_virtual(&result, 2276 throwable, 2277 SystemDictionary::Throwable_klass(), 2278 vmSymbols::printStackTrace_name(), 2279 vmSymbols::void_method_signature(), 2280 THREAD); 2281 } 2282 2283 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2284 if (!StackTraceInThrowable) return; 2285 ResourceMark rm(THREAD); 2286 2287 // Start out by clearing the backtrace for this object, in case the VM 2288 // runs out of memory while allocating the stack trace 2289 set_backtrace(throwable(), NULL); 2290 // Clear lazily constructed Java level stacktrace if refilling occurs 2291 // This is unnecessary in 1.7+ but harmless 2292 clear_stacktrace(throwable()); 2293 2294 int max_depth = MaxJavaStackTraceDepth; 2295 JavaThread* thread = (JavaThread*)THREAD; 2296 2297 BacktraceBuilder bt(CHECK); 2298 2299 // If there is no Java frame just return the method that was being called 2300 // with bci 0 2301 if (!thread->has_last_Java_frame()) { 2302 if (max_depth >= 1 && method() != NULL) { 2303 bt.push(method(), 0, CHECK); 2304 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2305 set_depth(throwable(), 1); 2306 set_backtrace(throwable(), bt.backtrace()); 2307 } 2308 return; 2309 } 2310 2311 // Instead of using vframe directly, this version of fill_in_stack_trace 2312 // basically handles everything by hand. This significantly improved the 2313 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2314 // See bug 6333838 for more details. 2315 // The "ASSERT" here is to verify this method generates the exactly same stack 2316 // trace as utilizing vframe. 2317 #ifdef ASSERT 2318 vframeStream st(thread); 2319 methodHandle st_method(THREAD, st.method()); 2320 #endif 2321 int total_count = 0; 2322 RegisterMap map(thread, false); 2323 int decode_offset = 0; 2324 CompiledMethod* nm = NULL; 2325 bool skip_fillInStackTrace_check = false; 2326 bool skip_throwableInit_check = false; 2327 bool skip_hidden = !ShowHiddenFrames; 2328 2329 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2330 Method* method = NULL; 2331 int bci = 0; 2332 2333 // Compiled java method case. 2334 if (decode_offset != 0) { 2335 DebugInfoReadStream stream(nm, decode_offset); 2336 decode_offset = stream.read_int(); 2337 method = (Method*)nm->metadata_at(stream.read_int()); 2338 bci = stream.read_bci(); 2339 } else { 2340 if (fr.is_first_frame()) break; 2341 address pc = fr.pc(); 2342 if (fr.is_interpreted_frame()) { 2343 address bcp = fr.interpreter_frame_bcp(); 2344 method = fr.interpreter_frame_method(); 2345 bci = method->bci_from(bcp); 2346 fr = fr.sender(&map); 2347 } else { 2348 CodeBlob* cb = fr.cb(); 2349 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2350 // but non nmethod 2351 fr = fr.sender(&map); 2352 if (cb == NULL || !cb->is_compiled()) { 2353 continue; 2354 } 2355 nm = cb->as_compiled_method(); 2356 if (nm->method()->is_native()) { 2357 method = nm->method(); 2358 bci = 0; 2359 } else { 2360 PcDesc* pd = nm->pc_desc_at(pc); 2361 decode_offset = pd->scope_decode_offset(); 2362 // if decode_offset is not equal to 0, it will execute the 2363 // "compiled java method case" at the beginning of the loop. 2364 continue; 2365 } 2366 } 2367 } 2368 #ifdef ASSERT 2369 assert(st_method() == method && st.bci() == bci, 2370 "Wrong stack trace"); 2371 st.next(); 2372 // vframeStream::method isn't GC-safe so store off a copy 2373 // of the Method* in case we GC. 2374 if (!st.at_end()) { 2375 st_method = st.method(); 2376 } 2377 #endif 2378 2379 // the format of the stacktrace will be: 2380 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2381 // - 0 or more <init> methods for the exception class (skipped) 2382 // - rest of the stack 2383 2384 if (!skip_fillInStackTrace_check) { 2385 if (method->name() == vmSymbols::fillInStackTrace_name() && 2386 throwable->is_a(method->method_holder())) { 2387 continue; 2388 } 2389 else { 2390 skip_fillInStackTrace_check = true; // gone past them all 2391 } 2392 } 2393 if (!skip_throwableInit_check) { 2394 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2395 2396 // skip <init> methods of the exception class and superclasses 2397 // This is simlar to classic VM. 2398 if (method->name() == vmSymbols::object_initializer_name() && 2399 throwable->is_a(method->method_holder())) { 2400 continue; 2401 } else { 2402 // there are none or we've seen them all - either way stop checking 2403 skip_throwableInit_check = true; 2404 } 2405 } 2406 if (method->is_hidden()) { 2407 if (skip_hidden) continue; 2408 } 2409 bt.push(method, bci, CHECK); 2410 total_count++; 2411 } 2412 2413 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2414 2415 // Put completed stack trace into throwable object 2416 set_backtrace(throwable(), bt.backtrace()); 2417 set_depth(throwable(), total_count); 2418 } 2419 2420 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2421 // No-op if stack trace is disabled 2422 if (!StackTraceInThrowable) { 2423 return; 2424 } 2425 2426 // Disable stack traces for some preallocated out of memory errors 2427 if (!Universe::should_fill_in_stack_trace(throwable)) { 2428 return; 2429 } 2430 2431 PRESERVE_EXCEPTION_MARK; 2432 2433 JavaThread* thread = JavaThread::active(); 2434 fill_in_stack_trace(throwable, method, thread); 2435 // ignore exceptions thrown during stack trace filling 2436 CLEAR_PENDING_EXCEPTION; 2437 } 2438 2439 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2440 // Allocate stack trace - backtrace is created but not filled in 2441 2442 // No-op if stack trace is disabled 2443 if (!StackTraceInThrowable) return; 2444 BacktraceBuilder bt(CHECK); // creates a backtrace 2445 set_backtrace(throwable(), bt.backtrace()); 2446 } 2447 2448 2449 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2450 // Fill in stack trace into preallocated backtrace (no GC) 2451 2452 // No-op if stack trace is disabled 2453 if (!StackTraceInThrowable) return; 2454 2455 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2456 2457 JavaThread* THREAD = JavaThread::current(); 2458 2459 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2460 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2461 2462 ResourceMark rm(THREAD); 2463 vframeStream st(THREAD); 2464 2465 BacktraceBuilder bt(THREAD, backtrace); 2466 2467 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2468 // methods as preallocated errors aren't created by "java" code. 2469 2470 // fill in as much stack trace as possible 2471 int chunk_count = 0; 2472 for (;!st.at_end(); st.next()) { 2473 bt.push(st.method(), st.bci(), CHECK); 2474 chunk_count++; 2475 2476 // Bail-out for deep stacks 2477 if (chunk_count >= trace_chunk_size) break; 2478 } 2479 set_depth(throwable(), chunk_count); 2480 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2481 2482 // We support the Throwable immutability protocol defined for Java 7. 2483 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2484 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2485 } 2486 2487 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2488 objArrayHandle stack_trace_array_h, TRAPS) { 2489 2490 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2491 THROW(vmSymbols::java_lang_NullPointerException()); 2492 } 2493 2494 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2495 2496 if (stack_trace_array_h->length() != depth(throwable())) { 2497 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2498 } 2499 2500 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2501 BacktraceIterator iter(result, THREAD); 2502 2503 int index = 0; 2504 while (iter.repeat()) { 2505 BacktraceElement bte = iter.next(THREAD); 2506 2507 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2508 2509 if (stack_trace_element.is_null()) { 2510 THROW(vmSymbols::java_lang_NullPointerException()); 2511 } 2512 2513 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2514 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2515 2516 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2517 method, 2518 bte._version, 2519 bte._bci, 2520 bte._name, CHECK); 2521 } 2522 } 2523 2524 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2525 // Allocate java.lang.StackTraceElement instance 2526 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2527 assert(k != NULL, "must be loaded in 1.4+"); 2528 if (k->should_be_initialized()) { 2529 k->initialize(CHECK_0); 2530 } 2531 2532 Handle element = k->allocate_instance_handle(CHECK_0); 2533 2534 int version = method->constants()->version(); 2535 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2536 return element(); 2537 } 2538 2539 void java_lang_StackTraceElement::fill_in(Handle element, 2540 InstanceKlass* holder, const methodHandle& method, 2541 int version, int bci, Symbol* name, TRAPS) { 2542 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2543 2544 // Fill in class name 2545 ResourceMark rm(THREAD); 2546 const char* str = holder->external_name(); 2547 oop classname = StringTable::intern((char*) str, CHECK); 2548 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2549 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2550 2551 oop loader = holder->class_loader(); 2552 if (loader != NULL) { 2553 oop loader_name = java_lang_ClassLoader::name(loader); 2554 if (loader_name != NULL) 2555 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2556 } 2557 2558 // Fill in method name 2559 oop methodname = StringTable::intern(name, CHECK); 2560 java_lang_StackTraceElement::set_methodName(element(), methodname); 2561 2562 // Fill in module name and version 2563 ModuleEntry* module = holder->module(); 2564 if (module->is_named()) { 2565 oop module_name = StringTable::intern(module->name(), CHECK); 2566 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2567 oop module_version; 2568 if (module->version() != NULL) { 2569 module_version = StringTable::intern(module->version(), CHECK); 2570 } else { 2571 module_version = NULL; 2572 } 2573 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2574 } 2575 2576 if (method() == NULL || !version_matches(method(), version)) { 2577 // The method was redefined, accurate line number information isn't available 2578 java_lang_StackTraceElement::set_fileName(element(), NULL); 2579 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2580 } else { 2581 // Fill in source file name and line number. 2582 Symbol* source = Backtrace::get_source_file_name(holder, version); 2583 if (ShowHiddenFrames && source == NULL) 2584 source = vmSymbols::unknown_class_name(); 2585 oop filename = StringTable::intern(source, CHECK); 2586 java_lang_StackTraceElement::set_fileName(element(), filename); 2587 2588 int line_number = Backtrace::get_line_number(method, bci); 2589 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2590 } 2591 } 2592 2593 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2594 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2595 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2596 // we should expand MemberName::name when Throwable uses StackTrace 2597 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2598 return method; 2599 } 2600 2601 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2602 // set Method* or mid/cpref 2603 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2604 InstanceKlass* ik = method->method_holder(); 2605 CallInfo info(method(), ik, CHECK); 2606 MethodHandles::init_method_MemberName(mname, info); 2607 // set bci 2608 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2609 // method may be redefined; store the version 2610 int version = method->constants()->version(); 2611 assert((jushort)version == version, "version should be short"); 2612 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2613 } 2614 2615 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2616 ResourceMark rm(THREAD); 2617 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2618 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2619 InstanceKlass* holder = InstanceKlass::cast(clazz); 2620 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2621 2622 short version = stackFrame->short_field(_version_offset); 2623 short bci = stackFrame->short_field(_bci_offset); 2624 Symbol* name = method->name(); 2625 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2626 } 2627 2628 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2629 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2630 macro(_bci_offset, k, "bci", short_signature, false) 2631 2632 void java_lang_StackFrameInfo::compute_offsets() { 2633 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2634 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2635 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2636 } 2637 2638 #if INCLUDE_CDS 2639 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) { 2640 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2641 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2642 } 2643 #endif 2644 2645 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2646 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2647 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2648 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2649 macro(_mode_offset, k, "mode", int_signature, false) 2650 2651 void java_lang_LiveStackFrameInfo::compute_offsets() { 2652 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2653 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2654 } 2655 2656 #if INCLUDE_CDS 2657 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) { 2658 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2659 } 2660 #endif 2661 2662 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2663 macro(override_offset, k, "override", bool_signature, false) 2664 2665 void java_lang_reflect_AccessibleObject::compute_offsets() { 2666 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2667 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2668 } 2669 2670 #if INCLUDE_CDS 2671 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) { 2672 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2673 } 2674 #endif 2675 2676 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2678 return (jboolean) reflect->bool_field(override_offset); 2679 } 2680 2681 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2682 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2683 reflect->bool_field_put(override_offset, (int) value); 2684 } 2685 2686 #define METHOD_FIELDS_DO(macro) \ 2687 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2688 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2689 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2690 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2691 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2692 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2693 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2694 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2695 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2696 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2697 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2698 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2699 2700 void java_lang_reflect_Method::compute_offsets() { 2701 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2702 // The generic signature and annotations fields are only present in 1.5 2703 signature_offset = -1; 2704 annotations_offset = -1; 2705 parameter_annotations_offset = -1; 2706 annotation_default_offset = -1; 2707 type_annotations_offset = -1; 2708 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2709 } 2710 2711 #if INCLUDE_CDS 2712 void java_lang_reflect_Method::serialize(SerializeClosure* f) { 2713 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2714 } 2715 #endif 2716 2717 Handle java_lang_reflect_Method::create(TRAPS) { 2718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2719 Klass* klass = SystemDictionary::reflect_Method_klass(); 2720 // This class is eagerly initialized during VM initialization, since we keep a refence 2721 // to one of the methods 2722 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2723 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2724 } 2725 2726 oop java_lang_reflect_Method::clazz(oop reflect) { 2727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2728 return reflect->obj_field(clazz_offset); 2729 } 2730 2731 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2733 reflect->obj_field_put(clazz_offset, value); 2734 } 2735 2736 int java_lang_reflect_Method::slot(oop reflect) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 return reflect->int_field(slot_offset); 2739 } 2740 2741 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2743 reflect->int_field_put(slot_offset, value); 2744 } 2745 2746 oop java_lang_reflect_Method::name(oop method) { 2747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2748 return method->obj_field(name_offset); 2749 } 2750 2751 void java_lang_reflect_Method::set_name(oop method, oop value) { 2752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2753 method->obj_field_put(name_offset, value); 2754 } 2755 2756 oop java_lang_reflect_Method::return_type(oop method) { 2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2758 return method->obj_field(returnType_offset); 2759 } 2760 2761 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2763 method->obj_field_put(returnType_offset, value); 2764 } 2765 2766 oop java_lang_reflect_Method::parameter_types(oop method) { 2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2768 return method->obj_field(parameterTypes_offset); 2769 } 2770 2771 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2773 method->obj_field_put(parameterTypes_offset, value); 2774 } 2775 2776 oop java_lang_reflect_Method::exception_types(oop method) { 2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2778 return method->obj_field(exceptionTypes_offset); 2779 } 2780 2781 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2783 method->obj_field_put(exceptionTypes_offset, value); 2784 } 2785 2786 int java_lang_reflect_Method::modifiers(oop method) { 2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2788 return method->int_field(modifiers_offset); 2789 } 2790 2791 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2793 method->int_field_put(modifiers_offset, value); 2794 } 2795 2796 bool java_lang_reflect_Method::has_signature_field() { 2797 return (signature_offset >= 0); 2798 } 2799 2800 oop java_lang_reflect_Method::signature(oop method) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 assert(has_signature_field(), "signature field must be present"); 2803 return method->obj_field(signature_offset); 2804 } 2805 2806 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2808 assert(has_signature_field(), "signature field must be present"); 2809 method->obj_field_put(signature_offset, value); 2810 } 2811 2812 bool java_lang_reflect_Method::has_annotations_field() { 2813 return (annotations_offset >= 0); 2814 } 2815 2816 oop java_lang_reflect_Method::annotations(oop method) { 2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2818 assert(has_annotations_field(), "annotations field must be present"); 2819 return method->obj_field(annotations_offset); 2820 } 2821 2822 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2823 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2824 assert(has_annotations_field(), "annotations field must be present"); 2825 method->obj_field_put(annotations_offset, value); 2826 } 2827 2828 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2829 return (parameter_annotations_offset >= 0); 2830 } 2831 2832 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2833 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2834 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2835 return method->obj_field(parameter_annotations_offset); 2836 } 2837 2838 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2840 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2841 method->obj_field_put(parameter_annotations_offset, value); 2842 } 2843 2844 bool java_lang_reflect_Method::has_annotation_default_field() { 2845 return (annotation_default_offset >= 0); 2846 } 2847 2848 oop java_lang_reflect_Method::annotation_default(oop method) { 2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2850 assert(has_annotation_default_field(), "annotation default field must be present"); 2851 return method->obj_field(annotation_default_offset); 2852 } 2853 2854 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2856 assert(has_annotation_default_field(), "annotation default field must be present"); 2857 method->obj_field_put(annotation_default_offset, value); 2858 } 2859 2860 bool java_lang_reflect_Method::has_type_annotations_field() { 2861 return (type_annotations_offset >= 0); 2862 } 2863 2864 oop java_lang_reflect_Method::type_annotations(oop method) { 2865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2866 assert(has_type_annotations_field(), "type_annotations field must be present"); 2867 return method->obj_field(type_annotations_offset); 2868 } 2869 2870 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2872 assert(has_type_annotations_field(), "type_annotations field must be present"); 2873 method->obj_field_put(type_annotations_offset, value); 2874 } 2875 2876 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2877 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2878 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2879 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2880 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2881 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2882 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2883 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2884 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2885 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2886 2887 2888 void java_lang_reflect_Constructor::compute_offsets() { 2889 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2890 // The generic signature and annotations fields are only present in 1.5 2891 signature_offset = -1; 2892 annotations_offset = -1; 2893 parameter_annotations_offset = -1; 2894 type_annotations_offset = -1; 2895 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2896 } 2897 2898 #if INCLUDE_CDS 2899 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) { 2900 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2901 } 2902 #endif 2903 2904 Handle java_lang_reflect_Constructor::create(TRAPS) { 2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2906 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2907 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2908 InstanceKlass* ik = InstanceKlass::cast(k); 2909 // Ensure it is initialized 2910 ik->initialize(CHECK_NH); 2911 return ik->allocate_instance_handle(THREAD); 2912 } 2913 2914 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2916 return reflect->obj_field(clazz_offset); 2917 } 2918 2919 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2921 reflect->obj_field_put(clazz_offset, value); 2922 } 2923 2924 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2926 return constructor->obj_field(parameterTypes_offset); 2927 } 2928 2929 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2931 constructor->obj_field_put(parameterTypes_offset, value); 2932 } 2933 2934 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2936 return constructor->obj_field(exceptionTypes_offset); 2937 } 2938 2939 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2941 constructor->obj_field_put(exceptionTypes_offset, value); 2942 } 2943 2944 int java_lang_reflect_Constructor::slot(oop reflect) { 2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2946 return reflect->int_field(slot_offset); 2947 } 2948 2949 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2951 reflect->int_field_put(slot_offset, value); 2952 } 2953 2954 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2956 return constructor->int_field(modifiers_offset); 2957 } 2958 2959 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2961 constructor->int_field_put(modifiers_offset, value); 2962 } 2963 2964 bool java_lang_reflect_Constructor::has_signature_field() { 2965 return (signature_offset >= 0); 2966 } 2967 2968 oop java_lang_reflect_Constructor::signature(oop constructor) { 2969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2970 assert(has_signature_field(), "signature field must be present"); 2971 return constructor->obj_field(signature_offset); 2972 } 2973 2974 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2976 assert(has_signature_field(), "signature field must be present"); 2977 constructor->obj_field_put(signature_offset, value); 2978 } 2979 2980 bool java_lang_reflect_Constructor::has_annotations_field() { 2981 return (annotations_offset >= 0); 2982 } 2983 2984 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2986 assert(has_annotations_field(), "annotations field must be present"); 2987 return constructor->obj_field(annotations_offset); 2988 } 2989 2990 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2992 assert(has_annotations_field(), "annotations field must be present"); 2993 constructor->obj_field_put(annotations_offset, value); 2994 } 2995 2996 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2997 return (parameter_annotations_offset >= 0); 2998 } 2999 3000 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3002 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3003 return method->obj_field(parameter_annotations_offset); 3004 } 3005 3006 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3008 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3009 method->obj_field_put(parameter_annotations_offset, value); 3010 } 3011 3012 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3013 return (type_annotations_offset >= 0); 3014 } 3015 3016 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3018 assert(has_type_annotations_field(), "type_annotations field must be present"); 3019 return constructor->obj_field(type_annotations_offset); 3020 } 3021 3022 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3024 assert(has_type_annotations_field(), "type_annotations field must be present"); 3025 constructor->obj_field_put(type_annotations_offset, value); 3026 } 3027 3028 #define FIELD_FIELDS_DO(macro) \ 3029 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3030 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3031 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3032 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3033 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3034 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3035 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3036 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3037 3038 void java_lang_reflect_Field::compute_offsets() { 3039 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3040 // The generic signature and annotations fields are only present in 1.5 3041 signature_offset = -1; 3042 annotations_offset = -1; 3043 type_annotations_offset = -1; 3044 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3045 } 3046 3047 #if INCLUDE_CDS 3048 void java_lang_reflect_Field::serialize(SerializeClosure* f) { 3049 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3050 } 3051 #endif 3052 3053 Handle java_lang_reflect_Field::create(TRAPS) { 3054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3055 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3056 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3057 InstanceKlass* ik = InstanceKlass::cast(k); 3058 // Ensure it is initialized 3059 ik->initialize(CHECK_NH); 3060 return ik->allocate_instance_handle(THREAD); 3061 } 3062 3063 oop java_lang_reflect_Field::clazz(oop reflect) { 3064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3065 return reflect->obj_field(clazz_offset); 3066 } 3067 3068 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3070 reflect->obj_field_put(clazz_offset, value); 3071 } 3072 3073 oop java_lang_reflect_Field::name(oop field) { 3074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3075 return field->obj_field(name_offset); 3076 } 3077 3078 void java_lang_reflect_Field::set_name(oop field, oop value) { 3079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3080 field->obj_field_put(name_offset, value); 3081 } 3082 3083 oop java_lang_reflect_Field::type(oop field) { 3084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3085 return field->obj_field(type_offset); 3086 } 3087 3088 void java_lang_reflect_Field::set_type(oop field, oop value) { 3089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3090 field->obj_field_put(type_offset, value); 3091 } 3092 3093 int java_lang_reflect_Field::slot(oop reflect) { 3094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3095 return reflect->int_field(slot_offset); 3096 } 3097 3098 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3099 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3100 reflect->int_field_put(slot_offset, value); 3101 } 3102 3103 int java_lang_reflect_Field::modifiers(oop field) { 3104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3105 return field->int_field(modifiers_offset); 3106 } 3107 3108 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3110 field->int_field_put(modifiers_offset, value); 3111 } 3112 3113 bool java_lang_reflect_Field::has_signature_field() { 3114 return (signature_offset >= 0); 3115 } 3116 3117 oop java_lang_reflect_Field::signature(oop field) { 3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3119 assert(has_signature_field(), "signature field must be present"); 3120 return field->obj_field(signature_offset); 3121 } 3122 3123 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3125 assert(has_signature_field(), "signature field must be present"); 3126 field->obj_field_put(signature_offset, value); 3127 } 3128 3129 bool java_lang_reflect_Field::has_annotations_field() { 3130 return (annotations_offset >= 0); 3131 } 3132 3133 oop java_lang_reflect_Field::annotations(oop field) { 3134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3135 assert(has_annotations_field(), "annotations field must be present"); 3136 return field->obj_field(annotations_offset); 3137 } 3138 3139 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3140 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3141 assert(has_annotations_field(), "annotations field must be present"); 3142 field->obj_field_put(annotations_offset, value); 3143 } 3144 3145 bool java_lang_reflect_Field::has_type_annotations_field() { 3146 return (type_annotations_offset >= 0); 3147 } 3148 3149 oop java_lang_reflect_Field::type_annotations(oop field) { 3150 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3151 assert(has_type_annotations_field(), "type_annotations field must be present"); 3152 return field->obj_field(type_annotations_offset); 3153 } 3154 3155 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3157 assert(has_type_annotations_field(), "type_annotations field must be present"); 3158 field->obj_field_put(type_annotations_offset, value); 3159 } 3160 3161 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3162 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3163 3164 void reflect_ConstantPool::compute_offsets() { 3165 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3166 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3167 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3168 } 3169 3170 #if INCLUDE_CDS 3171 void reflect_ConstantPool::serialize(SerializeClosure* f) { 3172 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3173 } 3174 #endif 3175 3176 #define PARAMETER_FIELDS_DO(macro) \ 3177 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3178 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3179 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3180 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3181 3182 void java_lang_reflect_Parameter::compute_offsets() { 3183 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3184 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3185 } 3186 3187 #if INCLUDE_CDS 3188 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) { 3189 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3190 } 3191 #endif 3192 3193 Handle java_lang_reflect_Parameter::create(TRAPS) { 3194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3195 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3196 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3197 InstanceKlass* ik = InstanceKlass::cast(k); 3198 // Ensure it is initialized 3199 ik->initialize(CHECK_NH); 3200 return ik->allocate_instance_handle(THREAD); 3201 } 3202 3203 oop java_lang_reflect_Parameter::name(oop param) { 3204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3205 return param->obj_field(name_offset); 3206 } 3207 3208 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3210 param->obj_field_put(name_offset, value); 3211 } 3212 3213 int java_lang_reflect_Parameter::modifiers(oop param) { 3214 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3215 return param->int_field(modifiers_offset); 3216 } 3217 3218 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3219 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3220 param->int_field_put(modifiers_offset, value); 3221 } 3222 3223 int java_lang_reflect_Parameter::index(oop param) { 3224 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3225 return param->int_field(index_offset); 3226 } 3227 3228 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3229 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3230 param->int_field_put(index_offset, value); 3231 } 3232 3233 oop java_lang_reflect_Parameter::executable(oop param) { 3234 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3235 return param->obj_field(executable_offset); 3236 } 3237 3238 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3239 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3240 param->obj_field_put(executable_offset, value); 3241 } 3242 3243 3244 int java_lang_Module::loader_offset; 3245 int java_lang_Module::name_offset; 3246 int java_lang_Module::_module_entry_offset = -1; 3247 3248 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3250 3251 Symbol* name = vmSymbols::java_lang_Module(); 3252 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3253 InstanceKlass* ik = InstanceKlass::cast(k); 3254 Handle jlmh = ik->allocate_instance_handle(CHECK_NH); 3255 JavaValue result(T_VOID); 3256 JavaCalls::call_special(&result, jlmh, ik, 3257 vmSymbols::object_initializer_name(), 3258 vmSymbols::java_lang_module_init_signature(), 3259 loader, module_name, CHECK_NH); 3260 return jlmh; 3261 } 3262 3263 #define MODULE_FIELDS_DO(macro) \ 3264 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3265 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3266 3267 void java_lang_Module::compute_offsets() { 3268 InstanceKlass* k = SystemDictionary::Module_klass(); 3269 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3270 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3271 } 3272 3273 #if INCLUDE_CDS 3274 void java_lang_Module::serialize(SerializeClosure* f) { 3275 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3276 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3277 } 3278 #endif 3279 3280 oop java_lang_Module::loader(oop module) { 3281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3282 return module->obj_field(loader_offset); 3283 } 3284 3285 void java_lang_Module::set_loader(oop module, oop value) { 3286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3287 module->obj_field_put(loader_offset, value); 3288 } 3289 3290 oop java_lang_Module::name(oop module) { 3291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3292 return module->obj_field(name_offset); 3293 } 3294 3295 void java_lang_Module::set_name(oop module, oop value) { 3296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3297 module->obj_field_put(name_offset, value); 3298 } 3299 3300 ModuleEntry* java_lang_Module::module_entry(oop module) { 3301 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3302 assert(module != NULL, "module can't be null"); 3303 assert(oopDesc::is_oop(module), "module must be oop"); 3304 3305 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3306 if (module_entry == NULL) { 3307 // If the inject field containing the ModuleEntry* is null then return the 3308 // class loader's unnamed module. 3309 oop loader = java_lang_Module::loader(module); 3310 Handle h_loader = Handle(Thread::current(), loader); 3311 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3312 return loader_cld->unnamed_module(); 3313 } 3314 return module_entry; 3315 } 3316 3317 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3318 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3319 assert(module != NULL, "module can't be null"); 3320 assert(oopDesc::is_oop(module), "module must be oop"); 3321 module->address_field_put(_module_entry_offset, (address)module_entry); 3322 } 3323 3324 Handle reflect_ConstantPool::create(TRAPS) { 3325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3326 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3327 // Ensure it is initialized 3328 k->initialize(CHECK_NH); 3329 return k->allocate_instance_handle(THREAD); 3330 } 3331 3332 3333 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3335 oop mirror = value->pool_holder()->java_mirror(); 3336 // Save the mirror to get back the constant pool. 3337 reflect->obj_field_put(_oop_offset, mirror); 3338 } 3339 3340 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3342 3343 oop mirror = reflect->obj_field(_oop_offset); 3344 Klass* k = java_lang_Class::as_Klass(mirror); 3345 assert(k->is_instance_klass(), "Must be"); 3346 3347 // Get the constant pool back from the klass. Since class redefinition 3348 // merges the new constant pool into the old, this is essentially the 3349 // same constant pool as the original. If constant pool merging is 3350 // no longer done in the future, this will have to change to save 3351 // the original. 3352 return InstanceKlass::cast(k)->constants(); 3353 } 3354 3355 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3356 macro(_base_offset, k, "base", object_signature, false) 3357 3358 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3359 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3360 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3361 } 3362 3363 #if INCLUDE_CDS 3364 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) { 3365 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3366 } 3367 #endif 3368 3369 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3370 Klass* k = SystemDictionary::box_klass(type); 3371 if (k == NULL) return NULL; 3372 InstanceKlass* ik = InstanceKlass::cast(k); 3373 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3374 return ik->allocate_instance(THREAD); 3375 } 3376 3377 3378 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3379 oop box = initialize_and_allocate(type, CHECK_0); 3380 if (box == NULL) return NULL; 3381 switch (type) { 3382 case T_BOOLEAN: 3383 box->bool_field_put(value_offset, value->z); 3384 break; 3385 case T_CHAR: 3386 box->char_field_put(value_offset, value->c); 3387 break; 3388 case T_FLOAT: 3389 box->float_field_put(value_offset, value->f); 3390 break; 3391 case T_DOUBLE: 3392 box->double_field_put(long_value_offset, value->d); 3393 break; 3394 case T_BYTE: 3395 box->byte_field_put(value_offset, value->b); 3396 break; 3397 case T_SHORT: 3398 box->short_field_put(value_offset, value->s); 3399 break; 3400 case T_INT: 3401 box->int_field_put(value_offset, value->i); 3402 break; 3403 case T_LONG: 3404 box->long_field_put(long_value_offset, value->j); 3405 break; 3406 default: 3407 return NULL; 3408 } 3409 return box; 3410 } 3411 3412 3413 BasicType java_lang_boxing_object::basic_type(oop box) { 3414 if (box == NULL) return T_ILLEGAL; 3415 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3416 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3417 return T_ILLEGAL; 3418 return type; 3419 } 3420 3421 3422 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3423 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3424 switch (type) { 3425 case T_BOOLEAN: 3426 value->z = box->bool_field(value_offset); 3427 break; 3428 case T_CHAR: 3429 value->c = box->char_field(value_offset); 3430 break; 3431 case T_FLOAT: 3432 value->f = box->float_field(value_offset); 3433 break; 3434 case T_DOUBLE: 3435 value->d = box->double_field(long_value_offset); 3436 break; 3437 case T_BYTE: 3438 value->b = box->byte_field(value_offset); 3439 break; 3440 case T_SHORT: 3441 value->s = box->short_field(value_offset); 3442 break; 3443 case T_INT: 3444 value->i = box->int_field(value_offset); 3445 break; 3446 case T_LONG: 3447 value->j = box->long_field(long_value_offset); 3448 break; 3449 default: 3450 return T_ILLEGAL; 3451 } // end switch 3452 return type; 3453 } 3454 3455 3456 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3457 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3458 switch (type) { 3459 case T_BOOLEAN: 3460 box->bool_field_put(value_offset, value->z); 3461 break; 3462 case T_CHAR: 3463 box->char_field_put(value_offset, value->c); 3464 break; 3465 case T_FLOAT: 3466 box->float_field_put(value_offset, value->f); 3467 break; 3468 case T_DOUBLE: 3469 box->double_field_put(long_value_offset, value->d); 3470 break; 3471 case T_BYTE: 3472 box->byte_field_put(value_offset, value->b); 3473 break; 3474 case T_SHORT: 3475 box->short_field_put(value_offset, value->s); 3476 break; 3477 case T_INT: 3478 box->int_field_put(value_offset, value->i); 3479 break; 3480 case T_LONG: 3481 box->long_field_put(long_value_offset, value->j); 3482 break; 3483 default: 3484 return T_ILLEGAL; 3485 } // end switch 3486 return type; 3487 } 3488 3489 3490 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3491 switch (type) { 3492 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3493 case T_CHAR: st->print("%d", value->c); break; 3494 case T_BYTE: st->print("%d", value->b); break; 3495 case T_SHORT: st->print("%d", value->s); break; 3496 case T_INT: st->print("%d", value->i); break; 3497 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3498 case T_FLOAT: st->print("%f", value->f); break; 3499 case T_DOUBLE: st->print("%lf", value->d); break; 3500 default: st->print("type %d?", type); break; 3501 } 3502 } 3503 3504 // Support for java_lang_ref_Reference 3505 3506 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3507 assert(obj != NULL, "sanity"); 3508 if (offset != java_lang_ref_Reference::referent_offset) { 3509 return false; 3510 } 3511 3512 Klass* k = obj->klass(); 3513 if (!k->is_instance_klass()) { 3514 return false; 3515 } 3516 3517 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3518 bool is_reference = ik->reference_type() != REF_NONE; 3519 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3520 return is_reference; 3521 } 3522 3523 // Support for java_lang_ref_SoftReference 3524 // 3525 3526 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3527 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3528 macro(static_clock_offset, k, "clock", long_signature, true) 3529 3530 void java_lang_ref_SoftReference::compute_offsets() { 3531 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3532 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3533 } 3534 3535 #if INCLUDE_CDS 3536 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) { 3537 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3538 } 3539 #endif 3540 3541 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3542 return ref->long_field(timestamp_offset); 3543 } 3544 3545 jlong java_lang_ref_SoftReference::clock() { 3546 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3547 oop base = ik->static_field_base_raw(); 3548 return base->long_field(static_clock_offset); 3549 } 3550 3551 void java_lang_ref_SoftReference::set_clock(jlong value) { 3552 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3553 oop base = ik->static_field_base_raw(); 3554 base->long_field_put(static_clock_offset, value); 3555 } 3556 3557 // Support for java_lang_invoke_DirectMethodHandle 3558 3559 int java_lang_invoke_DirectMethodHandle::_member_offset; 3560 3561 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3562 oop member_name = NULL; 3563 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3564 "a DirectMethodHandle oop is expected"); 3565 return dmh->obj_field(member_offset_in_bytes()); 3566 } 3567 3568 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3569 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3570 3571 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3572 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3573 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3574 } 3575 3576 #if INCLUDE_CDS 3577 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) { 3578 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3579 } 3580 #endif 3581 3582 // Support for java_lang_invoke_MethodHandle 3583 3584 int java_lang_invoke_MethodHandle::_type_offset; 3585 int java_lang_invoke_MethodHandle::_form_offset; 3586 3587 int java_lang_invoke_MemberName::_clazz_offset; 3588 int java_lang_invoke_MemberName::_name_offset; 3589 int java_lang_invoke_MemberName::_type_offset; 3590 int java_lang_invoke_MemberName::_flags_offset; 3591 int java_lang_invoke_MemberName::_method_offset; 3592 int java_lang_invoke_MemberName::_vmindex_offset; 3593 3594 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3595 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3596 3597 int java_lang_invoke_LambdaForm::_vmentry_offset; 3598 3599 #define METHODHANDLE_FIELDS_DO(macro) \ 3600 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3601 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3602 3603 void java_lang_invoke_MethodHandle::compute_offsets() { 3604 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3605 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3606 } 3607 3608 #if INCLUDE_CDS 3609 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) { 3610 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3611 } 3612 #endif 3613 3614 #define MEMBERNAME_FIELDS_DO(macro) \ 3615 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3616 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3617 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3618 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3619 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3620 3621 void java_lang_invoke_MemberName::compute_offsets() { 3622 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3623 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3624 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3625 } 3626 3627 #if INCLUDE_CDS 3628 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) { 3629 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3630 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3631 } 3632 #endif 3633 3634 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3635 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3636 assert(k != NULL, "jdk mismatch"); 3637 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3638 } 3639 3640 #if INCLUDE_CDS 3641 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) { 3642 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3643 } 3644 #endif 3645 3646 #define LAMBDAFORM_FIELDS_DO(macro) \ 3647 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3648 3649 void java_lang_invoke_LambdaForm::compute_offsets() { 3650 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3651 assert (k != NULL, "jdk mismatch"); 3652 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3653 } 3654 3655 #if INCLUDE_CDS 3656 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) { 3657 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3658 } 3659 #endif 3660 3661 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3662 return obj != NULL && is_subclass(obj->klass()); 3663 } 3664 3665 3666 oop java_lang_invoke_MethodHandle::type(oop mh) { 3667 return mh->obj_field(_type_offset); 3668 } 3669 3670 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3671 mh->obj_field_put(_type_offset, mtype); 3672 } 3673 3674 oop java_lang_invoke_MethodHandle::form(oop mh) { 3675 assert(_form_offset != 0, ""); 3676 return mh->obj_field(_form_offset); 3677 } 3678 3679 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3680 assert(_form_offset != 0, ""); 3681 mh->obj_field_put(_form_offset, lform); 3682 } 3683 3684 /// MemberName accessors 3685 3686 oop java_lang_invoke_MemberName::clazz(oop mname) { 3687 assert(is_instance(mname), "wrong type"); 3688 return mname->obj_field(_clazz_offset); 3689 } 3690 3691 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3692 assert(is_instance(mname), "wrong type"); 3693 mname->obj_field_put(_clazz_offset, clazz); 3694 } 3695 3696 oop java_lang_invoke_MemberName::name(oop mname) { 3697 assert(is_instance(mname), "wrong type"); 3698 return mname->obj_field(_name_offset); 3699 } 3700 3701 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3702 assert(is_instance(mname), "wrong type"); 3703 mname->obj_field_put(_name_offset, name); 3704 } 3705 3706 oop java_lang_invoke_MemberName::type(oop mname) { 3707 assert(is_instance(mname), "wrong type"); 3708 return mname->obj_field(_type_offset); 3709 } 3710 3711 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3712 assert(is_instance(mname), "wrong type"); 3713 mname->obj_field_put(_type_offset, type); 3714 } 3715 3716 int java_lang_invoke_MemberName::flags(oop mname) { 3717 assert(is_instance(mname), "wrong type"); 3718 return mname->int_field(_flags_offset); 3719 } 3720 3721 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3722 assert(is_instance(mname), "wrong type"); 3723 mname->int_field_put(_flags_offset, flags); 3724 } 3725 3726 3727 // Return vmtarget from ResolvedMethodName method field through indirection 3728 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3729 assert(is_instance(mname), "wrong type"); 3730 oop method = mname->obj_field(_method_offset); 3731 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3732 } 3733 3734 bool java_lang_invoke_MemberName::is_method(oop mname) { 3735 assert(is_instance(mname), "must be MemberName"); 3736 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3737 } 3738 3739 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3740 assert(is_instance(mname), "wrong type"); 3741 mname->obj_field_put(_method_offset, resolved_method); 3742 } 3743 3744 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3745 assert(is_instance(mname), "wrong type"); 3746 return (intptr_t) mname->address_field(_vmindex_offset); 3747 } 3748 3749 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3750 assert(is_instance(mname), "wrong type"); 3751 mname->address_field_put(_vmindex_offset, (address) index); 3752 } 3753 3754 3755 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3756 assert(is_instance(resolved_method), "wrong type"); 3757 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3758 assert(m->is_method(), "must be"); 3759 return m; 3760 } 3761 3762 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3763 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3764 assert(is_instance(resolved_method), "wrong type"); 3765 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3766 } 3767 3768 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3769 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3770 oop resolved_method = ResolvedMethodTable::find_method(m()); 3771 if (resolved_method == NULL) { 3772 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3773 if (!k->is_initialized()) { 3774 k->initialize(CHECK_NULL); 3775 } 3776 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3777 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3778 // Add a reference to the loader (actually mirror because anonymous classes will not have 3779 // distinct loaders) to ensure the metadata is kept alive. 3780 // This mirror may be different than the one in clazz field. 3781 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3782 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3783 } 3784 return resolved_method; 3785 } 3786 3787 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3788 assert(is_instance(lform), "wrong type"); 3789 return lform->obj_field(_vmentry_offset); 3790 } 3791 3792 3793 // Support for java_lang_invoke_MethodType 3794 3795 int java_lang_invoke_MethodType::_rtype_offset; 3796 int java_lang_invoke_MethodType::_ptypes_offset; 3797 3798 #define METHODTYPE_FIELDS_DO(macro) \ 3799 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3800 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3801 3802 void java_lang_invoke_MethodType::compute_offsets() { 3803 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3804 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3805 } 3806 3807 #if INCLUDE_CDS 3808 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) { 3809 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3810 } 3811 #endif 3812 3813 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3814 st->print("("); 3815 objArrayOop pts = ptypes(mt); 3816 for (int i = 0, limit = pts->length(); i < limit; i++) { 3817 java_lang_Class::print_signature(pts->obj_at(i), st); 3818 } 3819 st->print(")"); 3820 java_lang_Class::print_signature(rtype(mt), st); 3821 } 3822 3823 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3824 ResourceMark rm; 3825 stringStream buffer(128); 3826 print_signature(mt, &buffer); 3827 const char* sigstr = buffer.base(); 3828 int siglen = (int) buffer.size(); 3829 Symbol *name; 3830 if (!intern_if_not_found) { 3831 name = SymbolTable::probe(sigstr, siglen); 3832 } else { 3833 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3834 } 3835 return name; 3836 } 3837 3838 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3839 if (mt1 == mt2) 3840 return true; 3841 if (rtype(mt1) != rtype(mt2)) 3842 return false; 3843 if (ptype_count(mt1) != ptype_count(mt2)) 3844 return false; 3845 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3846 if (ptype(mt1, i) != ptype(mt2, i)) 3847 return false; 3848 } 3849 return true; 3850 } 3851 3852 oop java_lang_invoke_MethodType::rtype(oop mt) { 3853 assert(is_instance(mt), "must be a MethodType"); 3854 return mt->obj_field(_rtype_offset); 3855 } 3856 3857 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3858 assert(is_instance(mt), "must be a MethodType"); 3859 return (objArrayOop) mt->obj_field(_ptypes_offset); 3860 } 3861 3862 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3863 return ptypes(mt)->obj_at(idx); 3864 } 3865 3866 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3867 return ptypes(mt)->length(); 3868 } 3869 3870 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3871 objArrayOop pts = ptypes(mt); 3872 int count = pts->length(); 3873 int slots = 0; 3874 for (int i = 0; i < count; i++) { 3875 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3876 slots += type2size[bt]; 3877 } 3878 return slots; 3879 } 3880 3881 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3882 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3883 return type2size[bt]; 3884 } 3885 3886 3887 // Support for java_lang_invoke_CallSite 3888 3889 int java_lang_invoke_CallSite::_target_offset; 3890 int java_lang_invoke_CallSite::_context_offset; 3891 3892 #define CALLSITE_FIELDS_DO(macro) \ 3893 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3894 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3895 3896 void java_lang_invoke_CallSite::compute_offsets() { 3897 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3898 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3899 } 3900 3901 #if INCLUDE_CDS 3902 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) { 3903 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3904 } 3905 #endif 3906 3907 oop java_lang_invoke_CallSite::context(oop call_site) { 3908 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3909 3910 oop dep_oop = call_site->obj_field(_context_offset); 3911 return dep_oop; 3912 } 3913 3914 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3915 3916 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3917 3918 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3919 InstanceKlass* k = SystemDictionary::Context_klass(); 3920 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3921 } 3922 3923 #if INCLUDE_CDS 3924 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) { 3925 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3926 } 3927 #endif 3928 3929 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3930 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3931 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3932 DependencyContext dep_ctx(vmdeps_addr); 3933 return dep_ctx; 3934 } 3935 3936 // Support for java_security_AccessControlContext 3937 3938 int java_security_AccessControlContext::_context_offset = 0; 3939 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3940 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3941 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3942 3943 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3944 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3945 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3946 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3947 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3948 3949 void java_security_AccessControlContext::compute_offsets() { 3950 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3951 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3952 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3953 } 3954 3955 #if INCLUDE_CDS 3956 void java_security_AccessControlContext::serialize(SerializeClosure* f) { 3957 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3958 } 3959 #endif 3960 3961 bool java_security_AccessControlContext::is_authorized(Handle context) { 3962 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3963 assert(_isAuthorized_offset != -1, "should be set"); 3964 return context->bool_field(_isAuthorized_offset) != 0; 3965 } 3966 3967 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3968 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3969 // Ensure klass is initialized 3970 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3971 // Allocate result 3972 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3973 // Fill in values 3974 result->obj_field_put(_context_offset, context()); 3975 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3976 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3977 // whitelist AccessControlContexts created by the JVM if present 3978 if (_isAuthorized_offset != -1) { 3979 result->bool_field_put(_isAuthorized_offset, true); 3980 } 3981 return result; 3982 } 3983 3984 3985 // Support for java_lang_ClassLoader 3986 3987 bool java_lang_ClassLoader::offsets_computed = false; 3988 int java_lang_ClassLoader::_loader_data_offset = -1; 3989 int java_lang_ClassLoader::parallelCapable_offset = -1; 3990 int java_lang_ClassLoader::name_offset = -1; 3991 int java_lang_ClassLoader::unnamedModule_offset = -1; 3992 3993 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3994 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3995 return HeapAccess<>::load_at(loader, _loader_data_offset); 3996 } 3997 3998 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) { 3999 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4000 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data); 4001 } 4002 4003 #define CLASSLOADER_FIELDS_DO(macro) \ 4004 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4005 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4006 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4007 macro(parent_offset, k1, "parent", classloader_signature, false) 4008 4009 void java_lang_ClassLoader::compute_offsets() { 4010 assert(!offsets_computed, "offsets should be initialized only once"); 4011 offsets_computed = true; 4012 4013 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4014 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4015 4016 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4017 } 4018 4019 #if INCLUDE_CDS 4020 void java_lang_ClassLoader::serialize(SerializeClosure* f) { 4021 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4022 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4023 } 4024 #endif 4025 4026 oop java_lang_ClassLoader::parent(oop loader) { 4027 assert(is_instance(loader), "loader must be oop"); 4028 return loader->obj_field(parent_offset); 4029 } 4030 4031 oop java_lang_ClassLoader::name(oop loader) { 4032 assert(is_instance(loader), "loader must be oop"); 4033 return loader->obj_field(name_offset); 4034 } 4035 4036 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4037 assert(is_instance(loader), "loader must be oop"); 4038 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4039 oop acl = loader; 4040 debug_only(jint loop_count = 0); 4041 // This loop taken verbatim from ClassLoader.java: 4042 do { 4043 acl = parent(acl); 4044 if (cl == acl) { 4045 return true; 4046 } 4047 assert(++loop_count > 0, "loop_count overflow"); 4048 } while (acl != NULL); 4049 return false; 4050 } 4051 4052 bool java_lang_ClassLoader::is_instance(oop obj) { 4053 return obj != NULL && is_subclass(obj->klass()); 4054 } 4055 4056 4057 // For class loader classes, parallelCapable defined 4058 // based on non-null field 4059 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4060 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4061 if (parallelCapable_offset == -1) { 4062 // Default for backward compatibility is false 4063 return false; 4064 } 4065 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4066 } 4067 4068 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4069 // Fix for 4474172; see evaluation for more details 4070 loader = non_reflection_class_loader(loader); 4071 4072 oop cl = SystemDictionary::java_system_loader(); 4073 while(cl != NULL) { 4074 if (cl == loader) return true; 4075 cl = parent(cl); 4076 } 4077 return false; 4078 } 4079 4080 // Return true if this is one of the class loaders associated with 4081 // the generated bytecodes for reflection. 4082 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4083 if (loader != NULL) { 4084 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4085 // This might be null in non-1.4 JDKs 4086 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4087 } 4088 return false; 4089 } 4090 4091 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4092 // See whether this is one of the class loaders associated with 4093 // the generated bytecodes for reflection, and if so, "magically" 4094 // delegate to its parent to prevent class loading from occurring 4095 // in places where applications using reflection didn't expect it. 4096 if (is_reflection_class_loader(loader)) { 4097 return parent(loader); 4098 } 4099 return loader; 4100 } 4101 4102 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4103 assert(is_instance(loader), "loader must be oop"); 4104 return loader->obj_field(unnamedModule_offset); 4105 } 4106 4107 // Support for java_lang_System 4108 // 4109 #define SYSTEM_FIELDS_DO(macro) \ 4110 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4111 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4112 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4113 macro(static_security_offset, k, "security", security_manager_signature, true) 4114 4115 void java_lang_System::compute_offsets() { 4116 InstanceKlass* k = SystemDictionary::System_klass(); 4117 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4118 } 4119 4120 #if INCLUDE_CDS 4121 void java_lang_System::serialize(SerializeClosure* f) { 4122 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4123 } 4124 #endif 4125 4126 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4127 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4128 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4129 4130 4131 bool java_lang_System::has_security_manager() { 4132 InstanceKlass* ik = SystemDictionary::System_klass(); 4133 oop base = ik->static_field_base_raw(); 4134 return base->obj_field(static_security_offset) != NULL; 4135 } 4136 4137 int java_lang_Class::_klass_offset; 4138 int java_lang_Class::_array_klass_offset; 4139 int java_lang_Class::_oop_size_offset; 4140 int java_lang_Class::_static_oop_field_count_offset; 4141 int java_lang_Class::_class_loader_offset; 4142 int java_lang_Class::_module_offset; 4143 int java_lang_Class::_protection_domain_offset; 4144 int java_lang_Class::_component_mirror_offset; 4145 int java_lang_Class::_init_lock_offset; 4146 int java_lang_Class::_signers_offset; 4147 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4148 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4149 int java_lang_Throwable::backtrace_offset; 4150 int java_lang_Throwable::detailMessage_offset; 4151 int java_lang_Throwable::stackTrace_offset; 4152 int java_lang_Throwable::depth_offset; 4153 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4154 int java_lang_reflect_AccessibleObject::override_offset; 4155 int java_lang_reflect_Method::clazz_offset; 4156 int java_lang_reflect_Method::name_offset; 4157 int java_lang_reflect_Method::returnType_offset; 4158 int java_lang_reflect_Method::parameterTypes_offset; 4159 int java_lang_reflect_Method::exceptionTypes_offset; 4160 int java_lang_reflect_Method::slot_offset; 4161 int java_lang_reflect_Method::modifiers_offset; 4162 int java_lang_reflect_Method::signature_offset; 4163 int java_lang_reflect_Method::annotations_offset; 4164 int java_lang_reflect_Method::parameter_annotations_offset; 4165 int java_lang_reflect_Method::annotation_default_offset; 4166 int java_lang_reflect_Method::type_annotations_offset; 4167 int java_lang_reflect_Constructor::clazz_offset; 4168 int java_lang_reflect_Constructor::parameterTypes_offset; 4169 int java_lang_reflect_Constructor::exceptionTypes_offset; 4170 int java_lang_reflect_Constructor::slot_offset; 4171 int java_lang_reflect_Constructor::modifiers_offset; 4172 int java_lang_reflect_Constructor::signature_offset; 4173 int java_lang_reflect_Constructor::annotations_offset; 4174 int java_lang_reflect_Constructor::parameter_annotations_offset; 4175 int java_lang_reflect_Constructor::type_annotations_offset; 4176 int java_lang_reflect_Field::clazz_offset; 4177 int java_lang_reflect_Field::name_offset; 4178 int java_lang_reflect_Field::type_offset; 4179 int java_lang_reflect_Field::slot_offset; 4180 int java_lang_reflect_Field::modifiers_offset; 4181 int java_lang_reflect_Field::signature_offset; 4182 int java_lang_reflect_Field::annotations_offset; 4183 int java_lang_reflect_Field::type_annotations_offset; 4184 int java_lang_reflect_Parameter::name_offset; 4185 int java_lang_reflect_Parameter::modifiers_offset; 4186 int java_lang_reflect_Parameter::index_offset; 4187 int java_lang_reflect_Parameter::executable_offset; 4188 int java_lang_boxing_object::value_offset; 4189 int java_lang_boxing_object::long_value_offset; 4190 int java_lang_ref_Reference::referent_offset; 4191 int java_lang_ref_Reference::queue_offset; 4192 int java_lang_ref_Reference::next_offset; 4193 int java_lang_ref_Reference::discovered_offset; 4194 int java_lang_ref_SoftReference::timestamp_offset; 4195 int java_lang_ref_SoftReference::static_clock_offset; 4196 int java_lang_ClassLoader::parent_offset; 4197 int java_lang_System::static_in_offset; 4198 int java_lang_System::static_out_offset; 4199 int java_lang_System::static_err_offset; 4200 int java_lang_System::static_security_offset; 4201 int java_lang_StackTraceElement::methodName_offset; 4202 int java_lang_StackTraceElement::fileName_offset; 4203 int java_lang_StackTraceElement::lineNumber_offset; 4204 int java_lang_StackTraceElement::moduleName_offset; 4205 int java_lang_StackTraceElement::moduleVersion_offset; 4206 int java_lang_StackTraceElement::classLoaderName_offset; 4207 int java_lang_StackTraceElement::declaringClass_offset; 4208 int java_lang_StackTraceElement::declaringClassObject_offset; 4209 int java_lang_StackFrameInfo::_memberName_offset; 4210 int java_lang_StackFrameInfo::_bci_offset; 4211 int java_lang_StackFrameInfo::_version_offset; 4212 int java_lang_LiveStackFrameInfo::_monitors_offset; 4213 int java_lang_LiveStackFrameInfo::_locals_offset; 4214 int java_lang_LiveStackFrameInfo::_operands_offset; 4215 int java_lang_LiveStackFrameInfo::_mode_offset; 4216 int java_lang_AssertionStatusDirectives::classes_offset; 4217 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4218 int java_lang_AssertionStatusDirectives::packages_offset; 4219 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4220 int java_lang_AssertionStatusDirectives::deflt_offset; 4221 int java_nio_Buffer::_limit_offset; 4222 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 4223 int reflect_ConstantPool::_oop_offset; 4224 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4225 4226 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4227 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4228 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4229 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4230 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4231 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4232 macro(methodName_offset, k, "methodName", string_signature, false); \ 4233 macro(fileName_offset, k, "fileName", string_signature, false); \ 4234 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4235 4236 // Support for java_lang_StackTraceElement 4237 void java_lang_StackTraceElement::compute_offsets() { 4238 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4239 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4240 } 4241 4242 #if INCLUDE_CDS 4243 void java_lang_StackTraceElement::serialize(SerializeClosure* f) { 4244 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4245 } 4246 #endif 4247 4248 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4249 element->obj_field_put(fileName_offset, value); 4250 } 4251 4252 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4253 element->obj_field_put(declaringClass_offset, value); 4254 } 4255 4256 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4257 element->obj_field_put(methodName_offset, value); 4258 } 4259 4260 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4261 element->int_field_put(lineNumber_offset, value); 4262 } 4263 4264 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4265 element->obj_field_put(moduleName_offset, value); 4266 } 4267 4268 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4269 element->obj_field_put(moduleVersion_offset, value); 4270 } 4271 4272 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4273 element->obj_field_put(classLoaderName_offset, value); 4274 } 4275 4276 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4277 element->obj_field_put(declaringClassObject_offset, value); 4278 } 4279 4280 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4281 element->short_field_put(_version_offset, value); 4282 } 4283 4284 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4285 element->int_field_put(_bci_offset, value); 4286 } 4287 4288 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4289 element->obj_field_put(_monitors_offset, value); 4290 } 4291 4292 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4293 element->obj_field_put(_locals_offset, value); 4294 } 4295 4296 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4297 element->obj_field_put(_operands_offset, value); 4298 } 4299 4300 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4301 element->int_field_put(_mode_offset, value); 4302 } 4303 4304 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4305 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4306 macro(classes_offset, k, "classes", string_array_signature, false); \ 4307 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4308 macro(packages_offset, k, "packages", string_array_signature, false); \ 4309 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4310 macro(deflt_offset, k, "deflt", bool_signature, false) 4311 4312 void java_lang_AssertionStatusDirectives::compute_offsets() { 4313 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4314 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4315 } 4316 4317 #if INCLUDE_CDS 4318 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) { 4319 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4320 } 4321 #endif 4322 4323 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4324 o->obj_field_put(classes_offset, val); 4325 } 4326 4327 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4328 o->obj_field_put(classEnabled_offset, val); 4329 } 4330 4331 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4332 o->obj_field_put(packages_offset, val); 4333 } 4334 4335 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4336 o->obj_field_put(packageEnabled_offset, val); 4337 } 4338 4339 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4340 o->bool_field_put(deflt_offset, val); 4341 } 4342 4343 4344 // Support for intrinsification of java.nio.Buffer.checkIndex 4345 int java_nio_Buffer::limit_offset() { 4346 return _limit_offset; 4347 } 4348 4349 #define BUFFER_FIELDS_DO(macro) \ 4350 macro(_limit_offset, k, "limit", int_signature, false) 4351 4352 void java_nio_Buffer::compute_offsets() { 4353 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4354 assert(k != NULL, "must be loaded in 1.4+"); 4355 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4356 } 4357 4358 #if INCLUDE_CDS 4359 void java_nio_Buffer::serialize(SerializeClosure* f) { 4360 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4361 } 4362 #endif 4363 4364 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 4365 if (_owner_offset != 0) return; 4366 4367 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 4368 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 4369 compute_offset(_owner_offset, k, 4370 "exclusiveOwnerThread", vmSymbols::thread_signature()); 4371 } 4372 4373 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4374 assert(_owner_offset != 0, "Must be initialized"); 4375 return obj->obj_field(_owner_offset); 4376 } 4377 4378 static int member_offset(int hardcoded_offset) { 4379 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4380 } 4381 4382 // Compute hard-coded offsets 4383 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4384 // are not available to determine the offset_of_static_fields. 4385 void JavaClasses::compute_hard_coded_offsets() { 4386 4387 // java_lang_boxing_object 4388 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4389 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4390 4391 // java_lang_ref_Reference 4392 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4393 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4394 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4395 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4396 } 4397 4398 4399 // Compute non-hard-coded field offsets of all the classes in this file 4400 void JavaClasses::compute_offsets() { 4401 if (UseSharedSpaces) { 4402 return; // field offsets are loaded from archive 4403 } 4404 4405 // java_lang_Class::compute_offsets was called earlier in bootstrap 4406 java_lang_System::compute_offsets(); 4407 java_lang_ClassLoader::compute_offsets(); 4408 java_lang_Throwable::compute_offsets(); 4409 java_lang_Thread::compute_offsets(); 4410 java_lang_ThreadGroup::compute_offsets(); 4411 java_lang_AssertionStatusDirectives::compute_offsets(); 4412 java_lang_ref_SoftReference::compute_offsets(); 4413 java_lang_invoke_MethodHandle::compute_offsets(); 4414 java_lang_invoke_DirectMethodHandle::compute_offsets(); 4415 java_lang_invoke_MemberName::compute_offsets(); 4416 java_lang_invoke_ResolvedMethodName::compute_offsets(); 4417 java_lang_invoke_LambdaForm::compute_offsets(); 4418 java_lang_invoke_MethodType::compute_offsets(); 4419 java_lang_invoke_CallSite::compute_offsets(); 4420 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 4421 java_security_AccessControlContext::compute_offsets(); 4422 // Initialize reflection classes. The layouts of these classes 4423 // changed with the new reflection implementation in JDK 1.4, and 4424 // since the Universe doesn't know what JDK version it is until this 4425 // point we defer computation of these offsets until now. 4426 java_lang_reflect_AccessibleObject::compute_offsets(); 4427 java_lang_reflect_Method::compute_offsets(); 4428 java_lang_reflect_Constructor::compute_offsets(); 4429 java_lang_reflect_Field::compute_offsets(); 4430 java_nio_Buffer::compute_offsets(); 4431 reflect_ConstantPool::compute_offsets(); 4432 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 4433 java_lang_reflect_Parameter::compute_offsets(); 4434 java_lang_Module::compute_offsets(); 4435 java_lang_StackTraceElement::compute_offsets(); 4436 java_lang_StackFrameInfo::compute_offsets(); 4437 java_lang_LiveStackFrameInfo::compute_offsets(); 4438 4439 // generated interpreter code wants to know about the offsets we just computed: 4440 AbstractAssembler::update_delayed_values(); 4441 } 4442 4443 #ifndef PRODUCT 4444 4445 // These functions exist to assert the validity of hard-coded field offsets to guard 4446 // against changes in the class files 4447 4448 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4449 EXCEPTION_MARK; 4450 fieldDescriptor fd; 4451 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4452 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4453 InstanceKlass* ik = InstanceKlass::cast(k); 4454 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4455 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4456 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4457 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4458 return false; 4459 } 4460 if (fd.is_static()) { 4461 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4462 return false; 4463 } 4464 if (fd.offset() == hardcoded_offset ) { 4465 return true; 4466 } else { 4467 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4468 klass_name, field_name, hardcoded_offset, fd.offset()); 4469 return false; 4470 } 4471 } 4472 4473 // Check the hard-coded field offsets of all the classes in this file 4474 4475 void JavaClasses::check_offsets() { 4476 bool valid = true; 4477 4478 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4479 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4480 4481 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4482 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4483 4484 // Boxed primitive objects (java_lang_boxing_object) 4485 4486 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4487 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4488 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4489 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4490 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4491 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4492 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4493 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4494 4495 // java.lang.ref.Reference 4496 4497 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4498 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4499 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4500 // Fake field 4501 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4502 4503 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4504 } 4505 4506 #endif // PRODUCT 4507 4508 int InjectedField::compute_offset() { 4509 InstanceKlass* ik = InstanceKlass::cast(klass()); 4510 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4511 if (!may_be_java && !fs.access_flags().is_internal()) { 4512 // Only look at injected fields 4513 continue; 4514 } 4515 if (fs.name() == name() && fs.signature() == signature()) { 4516 return fs.offset(); 4517 } 4518 } 4519 ResourceMark rm; 4520 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)" : ""); 4521 #ifndef PRODUCT 4522 ik->print(); 4523 tty->print_cr("all fields:"); 4524 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4525 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4526 } 4527 #endif //PRODUCT 4528 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4529 return -1; 4530 } 4531 4532 void javaClasses_init() { 4533 JavaClasses::compute_offsets(); 4534 JavaClasses::check_offsets(); 4535 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4536 }