1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "logging/log.hpp" 38 #include "logging/logStream.hpp" 39 #include "memory/oopFactory.hpp" 40 #include "memory/metaspaceShared.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "oops/fieldStreams.hpp" 44 #include "oops/instanceKlass.hpp" 45 #include "oops/instanceMirrorKlass.hpp" 46 #include "oops/klass.hpp" 47 #include "oops/method.inline.hpp" 48 #include "oops/objArrayOop.inline.hpp" 49 #include "oops/oop.inline.hpp" 50 #include "oops/symbol.hpp" 51 #include "oops/typeArrayOop.inline.hpp" 52 #include "prims/resolvedMethodTable.hpp" 53 #include "runtime/fieldDescriptor.hpp" 54 #include "runtime/frame.inline.hpp" 55 #include "runtime/handles.inline.hpp" 56 #include "runtime/interfaceSupport.inline.hpp" 57 #include "runtime/java.hpp" 58 #include "runtime/javaCalls.hpp" 59 #include "runtime/jniHandles.inline.hpp" 60 #include "runtime/safepoint.hpp" 61 #include "runtime/safepointVerifiers.hpp" 62 #include "runtime/thread.inline.hpp" 63 #include "runtime/vframe.inline.hpp" 64 #include "utilities/align.hpp" 65 #include "utilities/preserveException.hpp" 66 67 #if INCLUDE_JVMCI 68 #include "jvmci/jvmciJavaClasses.hpp" 69 #endif 70 71 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 72 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 73 74 #if INCLUDE_CDS 75 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 76 f->do_u4((u4*)&_##name##_offset); 77 #endif 78 79 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 80 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 81 82 InjectedField JavaClasses::_injected_fields[] = { 83 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 84 }; 85 86 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 87 return _injected_fields[id].compute_offset(); 88 } 89 90 91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 92 *field_count = 0; 93 94 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 95 if (sid == vmSymbols::NO_SID) { 96 // Only well known classes can inject fields 97 return NULL; 98 } 99 100 int count = 0; 101 int start = -1; 102 103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 105 count++; \ 106 if (start == -1) start = klass##_##name##_enum; \ 107 } 108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 109 #undef LOOKUP_INJECTED_FIELD 110 111 if (start != -1) { 112 *field_count = count; 113 return _injected_fields + start; 114 } 115 return NULL; 116 } 117 118 119 // Helpful routine for computing field offsets at run time rather than hardcoding them 120 // Finds local fields only, including static fields. Static field offsets are from the 121 // beginning of the mirror. 122 static void compute_offset(int &dest_offset, 123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 124 bool is_static = false) { 125 fieldDescriptor fd; 126 if (ik == NULL) { 127 ResourceMark rm; 128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 129 vm_exit_during_initialization("Invalid layout of preloaded class"); 130 } 131 132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 133 ResourceMark rm; 134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 135 name_symbol->as_C_string(), signature_symbol->as_C_string()); 136 #ifndef PRODUCT 137 // Prints all fields and offsets 138 Log(class) lt; 139 LogStream ls(lt.error()); 140 ik->print_on(&ls); 141 #endif //PRODUCT 142 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 143 } 144 dest_offset = fd.offset(); 145 } 146 147 // Overloading to pass name as a string. 148 static void compute_offset(int& dest_offset, InstanceKlass* ik, 149 const char* name_string, Symbol* signature_symbol, 150 bool is_static = false) { 151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 152 if (name == NULL) { 153 ResourceMark rm; 154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 155 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name()); 156 } 157 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 158 } 159 160 // Same as above but for "optional" offsets that might not be present in certain JDK versions 161 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this 162 // function should be removed. 163 static void 164 compute_optional_offset(int& dest_offset, 165 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) { 166 fieldDescriptor fd; 167 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { 168 dest_offset = fd.offset(); 169 } 170 } 171 172 int java_lang_String::value_offset = 0; 173 int java_lang_String::hash_offset = 0; 174 int java_lang_String::coder_offset = 0; 175 176 bool java_lang_String::initialized = false; 177 178 bool java_lang_String::is_instance(oop obj) { 179 return is_instance_inlined(obj); 180 } 181 182 #if INCLUDE_CDS 183 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 184 f->do_u4((u4*)&offset) 185 186 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 187 f->do_u4((u4*)&offset) 188 #endif 189 190 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 191 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 192 193 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 194 compute_optional_offset(offset, klass, name, vmSymbols::signature()) 195 196 #define STRING_FIELDS_DO(macro) \ 197 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 198 macro(hash_offset, k, "hash", int_signature, false); \ 199 macro(coder_offset, k, "coder", byte_signature, false) 200 201 void java_lang_String::compute_offsets() { 202 if (initialized) { 203 return; 204 } 205 206 InstanceKlass* k = SystemDictionary::String_klass(); 207 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 208 209 initialized = true; 210 } 211 212 #if INCLUDE_CDS 213 void java_lang_String::serialize(SerializeClosure* f) { 214 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 215 f->do_u4((u4*)&initialized); 216 } 217 #endif 218 219 class CompactStringsFixup : public FieldClosure { 220 private: 221 bool _value; 222 223 public: 224 CompactStringsFixup(bool value) : _value(value) {} 225 226 void do_field(fieldDescriptor* fd) { 227 if (fd->name() == vmSymbols::compact_strings_name()) { 228 oop mirror = fd->field_holder()->java_mirror(); 229 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 230 assert(mirror != NULL, "String must have mirror already"); 231 mirror->bool_field_put(fd->offset(), _value); 232 } 233 } 234 }; 235 236 void java_lang_String::set_compact_strings(bool value) { 237 CompactStringsFixup fix(value); 238 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 239 } 240 241 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 242 assert(initialized, "Must be initialized"); 243 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 244 245 // Create the String object first, so there's a chance that the String 246 // and the char array it points to end up in the same cache line. 247 oop obj; 248 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 249 250 // Create the char array. The String object must be handlized here 251 // because GC can happen as a result of the allocation attempt. 252 Handle h_obj(THREAD, obj); 253 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 254 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 255 256 // Point the String at the char array 257 obj = h_obj(); 258 set_value(obj, buffer); 259 // No need to zero the offset, allocation zero'ed the entire String object 260 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 261 return h_obj; 262 } 263 264 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 265 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 266 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 267 typeArrayOop buffer = value(h_obj()); 268 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 269 if (is_latin1) { 270 for (int index = 0; index < length; index++) { 271 buffer->byte_at_put(index, (jbyte)unicode[index]); 272 } 273 } else { 274 for (int index = 0; index < length; index++) { 275 buffer->char_at_put(index, unicode[index]); 276 } 277 } 278 279 #ifdef ASSERT 280 { 281 ResourceMark rm; 282 char* expected = UNICODE::as_utf8(unicode, length); 283 char* actual = as_utf8_string(h_obj()); 284 if (strcmp(expected, actual) != 0) { 285 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 286 ShouldNotReachHere(); 287 } 288 } 289 #endif 290 291 return h_obj; 292 } 293 294 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 295 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 296 return h_obj(); 297 } 298 299 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 300 if (utf8_str == NULL) { 301 return Handle(); 302 } 303 bool has_multibyte, is_latin1; 304 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 305 if (!CompactStrings) { 306 has_multibyte = true; 307 is_latin1 = false; 308 } 309 310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 311 if (length > 0) { 312 if (!has_multibyte) { 313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 314 } else if (is_latin1) { 315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 316 } else { 317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 318 } 319 } 320 321 #ifdef ASSERT 322 // This check is too strict because the input string is not necessarily valid UTF8. 323 // For example, it may be created with arbitrary content via jni_NewStringUTF. 324 /* 325 { 326 ResourceMark rm; 327 const char* expected = utf8_str; 328 char* actual = as_utf8_string(h_obj()); 329 if (strcmp(expected, actual) != 0) { 330 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 331 ShouldNotReachHere(); 332 } 333 } 334 */ 335 #endif 336 337 return h_obj; 338 } 339 340 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 341 Handle h_obj = create_from_str(utf8_str, CHECK_0); 342 return h_obj(); 343 } 344 345 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 346 const char* utf8_str = (char*)symbol->bytes(); 347 int utf8_len = symbol->utf8_length(); 348 349 bool has_multibyte, is_latin1; 350 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 351 if (!CompactStrings) { 352 has_multibyte = true; 353 is_latin1 = false; 354 } 355 356 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 357 if (length > 0) { 358 if (!has_multibyte) { 359 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 360 } else if (is_latin1) { 361 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 362 } else { 363 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 364 } 365 } 366 367 #ifdef ASSERT 368 { 369 ResourceMark rm; 370 const char* expected = symbol->as_utf8(); 371 char* actual = as_utf8_string(h_obj()); 372 if (strncmp(expected, actual, utf8_len) != 0) { 373 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 374 ShouldNotReachHere(); 375 } 376 } 377 #endif 378 379 return h_obj; 380 } 381 382 // Converts a C string to a Java String based on current encoding 383 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 384 assert(str != NULL, "bad arguments"); 385 386 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 387 static to_java_string_fn_t _to_java_string_fn = NULL; 388 389 if (_to_java_string_fn == NULL) { 390 void *lib_handle = os::native_java_library(); 391 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 392 if (_to_java_string_fn == NULL) { 393 fatal("NewStringPlatform missing"); 394 } 395 } 396 397 jstring js = NULL; 398 { JavaThread* thread = (JavaThread*)THREAD; 399 assert(thread->is_Java_thread(), "must be java thread"); 400 HandleMark hm(thread); 401 ThreadToNativeFromVM ttn(thread); 402 js = (_to_java_string_fn)(thread->jni_environment(), str); 403 } 404 return Handle(THREAD, JNIHandles::resolve(js)); 405 } 406 407 // Converts a Java String to a native C string that can be used for 408 // native OS calls. 409 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 410 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 411 static to_platform_string_fn_t _to_platform_string_fn = NULL; 412 413 if (_to_platform_string_fn == NULL) { 414 void *lib_handle = os::native_java_library(); 415 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 416 if (_to_platform_string_fn == NULL) { 417 fatal("GetStringPlatformChars missing"); 418 } 419 } 420 421 char *native_platform_string; 422 { JavaThread* thread = (JavaThread*)THREAD; 423 assert(thread->is_Java_thread(), "must be java thread"); 424 JNIEnv *env = thread->jni_environment(); 425 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 426 bool is_copy; 427 HandleMark hm(thread); 428 ThreadToNativeFromVM ttn(thread); 429 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 430 assert(is_copy == JNI_TRUE, "is_copy value changed"); 431 JNIHandles::destroy_local(js); 432 } 433 return native_platform_string; 434 } 435 436 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 437 oop obj = java_string(); 438 // Typical usage is to convert all '/' to '.' in string. 439 typeArrayOop value = java_lang_String::value(obj); 440 int length = java_lang_String::length(obj); 441 bool is_latin1 = java_lang_String::is_latin1(obj); 442 443 // First check if any from_char exist 444 int index; // Declared outside, used later 445 for (index = 0; index < length; index++) { 446 jchar c = !is_latin1 ? value->char_at(index) : 447 ((jchar) value->byte_at(index)) & 0xff; 448 if (c == from_char) { 449 break; 450 } 451 } 452 if (index == length) { 453 // No from_char, so do not copy. 454 return java_string; 455 } 456 457 // Check if result string will be latin1 458 bool to_is_latin1 = false; 459 460 // Replacement char must be latin1 461 if (CompactStrings && UNICODE::is_latin1(to_char)) { 462 if (is_latin1) { 463 // Source string is latin1 as well 464 to_is_latin1 = true; 465 } else if (!UNICODE::is_latin1(from_char)) { 466 // We are replacing an UTF16 char. Scan string to 467 // check if result can be latin1 encoded. 468 to_is_latin1 = true; 469 for (index = 0; index < length; index++) { 470 jchar c = value->char_at(index); 471 if (c != from_char && !UNICODE::is_latin1(c)) { 472 to_is_latin1 = false; 473 break; 474 } 475 } 476 } 477 } 478 479 // Create new UNICODE (or byte) buffer. Must handlize value because GC 480 // may happen during String and char array creation. 481 typeArrayHandle h_value(THREAD, value); 482 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 483 typeArrayOop from_buffer = h_value(); 484 typeArrayOop to_buffer = java_lang_String::value(string()); 485 486 // Copy contents 487 for (index = 0; index < length; index++) { 488 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 489 ((jchar) from_buffer->byte_at(index)) & 0xff; 490 if (c == from_char) { 491 c = to_char; 492 } 493 if (!to_is_latin1) { 494 to_buffer->char_at_put(index, c); 495 } else { 496 to_buffer->byte_at_put(index, (jbyte) c); 497 } 498 } 499 return string; 500 } 501 502 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 503 typeArrayOop value = java_lang_String::value(java_string); 504 length = java_lang_String::length(java_string); 505 bool is_latin1 = java_lang_String::is_latin1(java_string); 506 507 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 508 if (result != NULL) { 509 if (!is_latin1) { 510 for (int index = 0; index < length; index++) { 511 result[index] = value->char_at(index); 512 } 513 } else { 514 for (int index = 0; index < length; index++) { 515 result[index] = ((jchar) value->byte_at(index)) & 0xff; 516 } 517 } 518 } else { 519 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 520 } 521 return result; 522 } 523 524 unsigned int java_lang_String::hash_code(oop java_string) { 525 int length = java_lang_String::length(java_string); 526 // Zero length string will hash to zero with String.hashCode() function. 527 if (length == 0) return 0; 528 529 typeArrayOop value = java_lang_String::value(java_string); 530 bool is_latin1 = java_lang_String::is_latin1(java_string); 531 532 if (is_latin1) { 533 return java_lang_String::hash_code(value->byte_at_addr(0), length); 534 } else { 535 return java_lang_String::hash_code(value->char_at_addr(0), length); 536 } 537 } 538 539 char* java_lang_String::as_quoted_ascii(oop java_string) { 540 typeArrayOop value = java_lang_String::value(java_string); 541 int length = java_lang_String::length(java_string); 542 bool is_latin1 = java_lang_String::is_latin1(java_string); 543 544 if (length == 0) return NULL; 545 546 char* result; 547 int result_length; 548 if (!is_latin1) { 549 jchar* base = value->char_at_addr(0); 550 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 551 result = NEW_RESOURCE_ARRAY(char, result_length); 552 UNICODE::as_quoted_ascii(base, length, result, result_length); 553 } else { 554 jbyte* base = value->byte_at_addr(0); 555 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 556 result = NEW_RESOURCE_ARRAY(char, result_length); 557 UNICODE::as_quoted_ascii(base, length, result, result_length); 558 } 559 assert(result_length >= length + 1, "must not be shorter"); 560 assert(result_length == (int)strlen(result) + 1, "must match"); 561 return result; 562 } 563 564 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 570 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 571 return sym; 572 } else { 573 ResourceMark rm; 574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 575 const char* base = UNICODE::as_utf8(position, length); 576 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 577 return sym; 578 } 579 } 580 581 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 582 typeArrayOop value = java_lang_String::value(java_string); 583 int length = java_lang_String::length(java_string); 584 bool is_latin1 = java_lang_String::is_latin1(java_string); 585 if (!is_latin1) { 586 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 587 return SymbolTable::probe_unicode(base, length); 588 } else { 589 ResourceMark rm; 590 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 591 const char* base = UNICODE::as_utf8(position, length); 592 return SymbolTable::probe(base, length); 593 } 594 } 595 596 int java_lang_String::utf8_length(oop java_string) { 597 typeArrayOop value = java_lang_String::value(java_string); 598 int length = java_lang_String::length(java_string); 599 bool is_latin1 = java_lang_String::is_latin1(java_string); 600 if (length == 0) { 601 return 0; 602 } 603 if (!is_latin1) { 604 return UNICODE::utf8_length(value->char_at_addr(0), length); 605 } else { 606 return UNICODE::utf8_length(value->byte_at_addr(0), length); 607 } 608 } 609 610 char* java_lang_String::as_utf8_string(oop java_string) { 611 typeArrayOop value = java_lang_String::value(java_string); 612 int length = java_lang_String::length(java_string); 613 bool is_latin1 = java_lang_String::is_latin1(java_string); 614 if (!is_latin1) { 615 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 616 return UNICODE::as_utf8(position, length); 617 } else { 618 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 619 return UNICODE::as_utf8(position, length); 620 } 621 } 622 623 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 int length = java_lang_String::length(java_string); 626 bool is_latin1 = java_lang_String::is_latin1(java_string); 627 if (!is_latin1) { 628 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 629 return UNICODE::as_utf8(position, length, buf, buflen); 630 } else { 631 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 632 return UNICODE::as_utf8(position, length, buf, buflen); 633 } 634 } 635 636 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 637 typeArrayOop value = java_lang_String::value(java_string); 638 int length = java_lang_String::length(java_string); 639 assert(start + len <= length, "just checking"); 640 bool is_latin1 = java_lang_String::is_latin1(java_string); 641 if (!is_latin1) { 642 jchar* position = value->char_at_addr(start); 643 return UNICODE::as_utf8(position, len); 644 } else { 645 jbyte* position = value->byte_at_addr(start); 646 return UNICODE::as_utf8(position, len); 647 } 648 } 649 650 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 651 typeArrayOop value = java_lang_String::value(java_string); 652 int length = java_lang_String::length(java_string); 653 assert(start + len <= length, "just checking"); 654 bool is_latin1 = java_lang_String::is_latin1(java_string); 655 if (!is_latin1) { 656 jchar* position = value->char_at_addr(start); 657 return UNICODE::as_utf8(position, len, buf, buflen); 658 } else { 659 jbyte* position = value->byte_at_addr(start); 660 return UNICODE::as_utf8(position, len, buf, buflen); 661 } 662 } 663 664 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 665 assert(java_string->klass() == SystemDictionary::String_klass(), 666 "must be java_string"); 667 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 668 int length = java_lang_String::length(java_string); 669 if (length != len) { 670 return false; 671 } 672 bool is_latin1 = java_lang_String::is_latin1(java_string); 673 if (!is_latin1) { 674 for (int i = 0; i < len; i++) { 675 if (value->char_at(i) != chars[i]) { 676 return false; 677 } 678 } 679 } else { 680 for (int i = 0; i < len; i++) { 681 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 682 return false; 683 } 684 } 685 } 686 return true; 687 } 688 689 bool java_lang_String::equals(oop str1, oop str2) { 690 assert(str1->klass() == SystemDictionary::String_klass(), 691 "must be java String"); 692 assert(str2->klass() == SystemDictionary::String_klass(), 693 "must be java String"); 694 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 695 int length1 = java_lang_String::length(str1); 696 bool is_latin1 = java_lang_String::is_latin1(str1); 697 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 698 int length2 = java_lang_String::length(str2); 699 bool is_latin2 = java_lang_String::is_latin1(str2); 700 701 if ((length1 != length2) || (is_latin1 != is_latin2)) { 702 // Strings of different size or with different 703 // coders are never equal. 704 return false; 705 } 706 int blength1 = value1->length(); 707 for (int i = 0; i < blength1; i++) { 708 if (value1->byte_at(i) != value2->byte_at(i)) { 709 return false; 710 } 711 } 712 return true; 713 } 714 715 void java_lang_String::print(oop java_string, outputStream* st) { 716 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 717 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 718 719 if (value == NULL) { 720 // This can happen if, e.g., printing a String 721 // object before its initializer has been called 722 st->print("NULL"); 723 return; 724 } 725 726 int length = java_lang_String::length(java_string); 727 bool is_latin1 = java_lang_String::is_latin1(java_string); 728 729 st->print("\""); 730 for (int index = 0; index < length; index++) { 731 st->print("%c", (!is_latin1) ? value->char_at(index) : 732 ((jchar) value->byte_at(index)) & 0xff ); 733 } 734 st->print("\""); 735 } 736 737 738 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 739 assert(mirror.not_null() && fd->is_static(), "just checking"); 740 if (fd->has_initial_value()) { 741 BasicType t = fd->field_type(); 742 switch (t) { 743 case T_BYTE: 744 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 745 break; 746 case T_BOOLEAN: 747 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 748 break; 749 case T_CHAR: 750 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 751 break; 752 case T_SHORT: 753 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 754 break; 755 case T_INT: 756 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 757 break; 758 case T_FLOAT: 759 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 760 break; 761 case T_DOUBLE: 762 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 763 break; 764 case T_LONG: 765 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 766 break; 767 case T_OBJECT: 768 { 769 assert(fd->signature() == vmSymbols::string_signature(), 770 "just checking"); 771 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) { 772 // Archive the String field and update the pointer. 773 oop s = mirror()->obj_field(fd->offset()); 774 oop archived_s = StringTable::create_archived_string(s, CHECK); 775 mirror()->obj_field_put(fd->offset(), archived_s); 776 } else { 777 oop string = fd->string_initial_value(CHECK); 778 mirror()->obj_field_put(fd->offset(), string); 779 } 780 } 781 break; 782 default: 783 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 784 "Illegal ConstantValue attribute in class file"); 785 } 786 } 787 } 788 789 790 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 791 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 792 793 // If the offset was read from the shared archive, it was fixed up already 794 if (!k->is_shared()) { 795 if (k->is_instance_klass()) { 796 // During bootstrap, java.lang.Class wasn't loaded so static field 797 // offsets were computed without the size added it. Go back and 798 // update all the static field offsets to included the size. 799 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 800 if (fs.access_flags().is_static()) { 801 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 802 fs.set_offset(real_offset); 803 } 804 } 805 } 806 } 807 808 if (k->is_shared() && k->has_raw_archived_mirror()) { 809 if (MetaspaceShared::open_archive_heap_region_mapped()) { 810 oop m = k->archived_java_mirror(); 811 assert(m != NULL, "archived mirror is NULL"); 812 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object"); 813 Handle m_h(THREAD, m); 814 // restore_archived_mirror() clears the klass' _has_raw_archived_mirror flag 815 restore_archived_mirror(k, m_h, Handle(), Handle(), Handle(), CHECK); 816 return; 817 } else { 818 k->set_java_mirror_handle(NULL); 819 k->clear_has_raw_archived_mirror(); 820 } 821 } 822 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 823 } 824 825 void java_lang_Class::initialize_mirror_fields(Klass* k, 826 Handle mirror, 827 Handle protection_domain, 828 TRAPS) { 829 // Allocate a simple java object for a lock. 830 // This needs to be a java object because during class initialization 831 // it can be held across a java call. 832 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 833 set_init_lock(mirror(), r); 834 835 // Set protection domain also 836 set_protection_domain(mirror(), protection_domain()); 837 838 // Initialize static fields 839 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 840 } 841 842 // Set the java.lang.Module module field in the java_lang_Class mirror 843 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 844 if (module.is_null()) { 845 // During startup, the module may be NULL only if java.base has not been defined yet. 846 // Put the class on the fixup_module_list to patch later when the java.lang.Module 847 // for java.base is known. 848 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 849 850 bool javabase_was_defined = false; 851 { 852 MutexLocker m1(Module_lock, THREAD); 853 // Keep list of classes needing java.base module fixup 854 if (!ModuleEntryTable::javabase_defined()) { 855 assert(k->java_mirror() != NULL, "Class's mirror is null"); 856 k->class_loader_data()->inc_keep_alive(); 857 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 858 fixup_module_field_list()->push(k); 859 } else { 860 javabase_was_defined = true; 861 } 862 } 863 864 // If java.base was already defined then patch this particular class with java.base. 865 if (javabase_was_defined) { 866 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 867 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 868 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 869 Handle javabase_handle(THREAD, javabase_entry->module()); 870 set_module(mirror(), javabase_handle()); 871 } 872 } else { 873 assert(Universe::is_module_initialized() || 874 (ModuleEntryTable::javabase_defined() && 875 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))), 876 "Incorrect java.lang.Module specification while creating mirror"); 877 set_module(mirror(), module()); 878 } 879 } 880 881 // Statically allocate fixup lists because they always get created. 882 void java_lang_Class::allocate_fixup_lists() { 883 GrowableArray<Klass*>* mirror_list = 884 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 885 set_fixup_mirror_list(mirror_list); 886 887 GrowableArray<Klass*>* module_list = 888 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 889 set_fixup_module_field_list(module_list); 890 } 891 892 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 893 Handle module, Handle protection_domain, TRAPS) { 894 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 895 assert(k->java_mirror() == NULL, "should only assign mirror once"); 896 897 // Use this moment of initialization to cache modifier_flags also, 898 // to support Class.getModifiers(). Instance classes recalculate 899 // the cached flags after the class file is parsed, but before the 900 // class is put into the system dictionary. 901 int computed_modifiers = k->compute_modifier_flags(CHECK); 902 k->set_modifier_flags(computed_modifiers); 903 // Class_klass has to be loaded because it is used to allocate 904 // the mirror. 905 if (SystemDictionary::Class_klass_loaded()) { 906 // Allocate mirror (java.lang.Class instance) 907 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 908 Handle mirror(THREAD, mirror_oop); 909 Handle comp_mirror; 910 911 // Setup indirection from mirror->klass 912 java_lang_Class::set_klass(mirror(), k); 913 914 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 915 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 916 917 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 918 919 // It might also have a component mirror. This mirror must already exist. 920 if (k->is_array_klass()) { 921 if (k->is_typeArray_klass()) { 922 BasicType type = TypeArrayKlass::cast(k)->element_type(); 923 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 924 } else { 925 assert(k->is_objArray_klass(), "Must be"); 926 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 927 assert(element_klass != NULL, "Must have an element klass"); 928 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 929 } 930 assert(comp_mirror() != NULL, "must have a mirror"); 931 932 // Two-way link between the array klass and its component mirror: 933 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 934 set_component_mirror(mirror(), comp_mirror()); 935 // See below for ordering dependencies between field array_klass in component mirror 936 // and java_mirror in this klass. 937 } else { 938 assert(k->is_instance_klass(), "Must be"); 939 940 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 941 if (HAS_PENDING_EXCEPTION) { 942 // If any of the fields throws an exception like OOM remove the klass field 943 // from the mirror so GC doesn't follow it after the klass has been deallocated. 944 // This mirror looks like a primitive type, which logically it is because it 945 // it represents no class. 946 java_lang_Class::set_klass(mirror(), NULL); 947 return; 948 } 949 } 950 951 // set the classLoader field in the java_lang_Class instance 952 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same"); 953 set_class_loader(mirror(), class_loader()); 954 955 // Setup indirection from klass->mirror 956 // after any exceptions can happen during allocations. 957 k->set_java_mirror(mirror); 958 959 // Set the module field in the java_lang_Class instance. This must be done 960 // after the mirror is set. 961 set_mirror_module_field(k, mirror, module, THREAD); 962 963 if (comp_mirror() != NULL) { 964 // Set after k->java_mirror() is published, because compiled code running 965 // concurrently doesn't expect a k to have a null java_mirror. 966 release_set_array_klass(comp_mirror(), k); 967 } 968 } else { 969 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 970 fixup_mirror_list()->push(k); 971 } 972 } 973 974 #if INCLUDE_CDS_JAVA_HEAP 975 // Clears mirror fields. Static final fields with initial values are reloaded 976 // from constant pool. The object identity hash is in the object header and is 977 // not affected. 978 class ResetMirrorField: public FieldClosure { 979 private: 980 Handle _m; 981 982 public: 983 ResetMirrorField(Handle mirror) : _m(mirror) {} 984 985 void do_field(fieldDescriptor* fd) { 986 assert(DumpSharedSpaces, "dump time only"); 987 assert(_m.not_null(), "Mirror cannot be NULL"); 988 989 if (fd->is_static() && fd->has_initial_value()) { 990 initialize_static_field(fd, _m, Thread::current()); 991 return; 992 } 993 994 BasicType ft = fd->field_type(); 995 switch (ft) { 996 case T_BYTE: 997 _m()->byte_field_put(fd->offset(), 0); 998 break; 999 case T_CHAR: 1000 _m()->char_field_put(fd->offset(), 0); 1001 break; 1002 case T_DOUBLE: 1003 _m()->double_field_put(fd->offset(), 0); 1004 break; 1005 case T_FLOAT: 1006 _m()->float_field_put(fd->offset(), 0); 1007 break; 1008 case T_INT: 1009 _m()->int_field_put(fd->offset(), 0); 1010 break; 1011 case T_LONG: 1012 _m()->long_field_put(fd->offset(), 0); 1013 break; 1014 case T_SHORT: 1015 _m()->short_field_put(fd->offset(), 0); 1016 break; 1017 case T_BOOLEAN: 1018 _m()->bool_field_put(fd->offset(), false); 1019 break; 1020 case T_ARRAY: 1021 case T_OBJECT: { 1022 // It might be useful to cache the String field, but 1023 // for now just clear out any reference field 1024 oop o = _m()->obj_field(fd->offset()); 1025 _m()->obj_field_put(fd->offset(), NULL); 1026 break; 1027 } 1028 default: 1029 ShouldNotReachHere(); 1030 break; 1031 } 1032 } 1033 }; 1034 1035 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1036 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1037 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1038 1039 for (int t = 0; t <= T_VOID; t++) { 1040 oop m = Universe::_mirrors[t]; 1041 if (m != NULL) { 1042 // Update the field at _array_klass_offset to point to the relocated array klass. 1043 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD); 1044 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1045 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1046 if (ak != NULL) { 1047 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1048 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1049 } 1050 1051 // Clear the fields. Just to be safe 1052 Klass *k = m->klass(); 1053 Handle archived_mirror_h(THREAD, archived_m); 1054 ResetMirrorField reset(archived_mirror_h); 1055 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1056 1057 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1058 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1059 1060 Universe::_mirrors[t] = archived_m; 1061 } 1062 } 1063 1064 assert(Universe::_mirrors[T_INT] != NULL && 1065 Universe::_mirrors[T_FLOAT] != NULL && 1066 Universe::_mirrors[T_DOUBLE] != NULL && 1067 Universe::_mirrors[T_BYTE] != NULL && 1068 Universe::_mirrors[T_BOOLEAN] != NULL && 1069 Universe::_mirrors[T_CHAR] != NULL && 1070 Universe::_mirrors[T_LONG] != NULL && 1071 Universe::_mirrors[T_SHORT] != NULL && 1072 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1073 1074 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1075 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1076 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1077 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1078 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1079 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1080 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1081 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1082 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1083 } 1084 1085 // 1086 // After the mirror object is successfully archived, the archived 1087 // klass is set with _has_archived_raw_mirror flag. 1088 // 1089 // The _has_archived_raw_mirror flag is cleared at runtime when the 1090 // archived mirror is restored. If archived java heap data cannot 1091 // be used at runtime, new mirror object is created for the shared 1092 // class. The _has_archived_raw_mirror is cleared also during the process. 1093 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1094 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1095 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1096 1097 // Mirror is already archived 1098 if (k->has_raw_archived_mirror()) { 1099 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1100 return k->archived_java_mirror_raw(); 1101 } 1102 1103 // No mirror 1104 oop mirror = k->java_mirror(); 1105 if (mirror == NULL) { 1106 return NULL; 1107 } 1108 1109 if (k->is_instance_klass()) { 1110 InstanceKlass *ik = InstanceKlass::cast(k); 1111 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1112 "class with signer cannot be supported"); 1113 1114 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1115 ik->is_shared_app_class())) { 1116 // Archiving mirror for classes from non-builtin loaders is not 1117 // supported. Clear the _java_mirror within the archived class. 1118 k->set_java_mirror_handle(NULL); 1119 return NULL; 1120 } 1121 } 1122 1123 // Now start archiving the mirror object 1124 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD); 1125 if (archived_mirror == NULL) { 1126 return NULL; 1127 } 1128 1129 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1130 if (archived_mirror == NULL) { 1131 return NULL; 1132 } 1133 1134 k->set_archived_java_mirror_raw(archived_mirror); 1135 1136 k->set_has_raw_archived_mirror(); 1137 1138 ResourceMark rm; 1139 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1140 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1141 1142 return archived_mirror; 1143 } 1144 1145 // The process is based on create_mirror(). 1146 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1147 oop archived_mirror, 1148 Thread *THREAD) { 1149 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1150 // to archived metadata and objects below. 1151 Klass *c = archived_mirror->klass(); 1152 Handle archived_mirror_h(THREAD, archived_mirror); 1153 ResetMirrorField reset(archived_mirror_h); 1154 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1155 1156 if (k->is_array_klass()) { 1157 oop archived_comp_mirror; 1158 if (k->is_typeArray_klass()) { 1159 // The primitive type mirrors are already archived. Get the archived mirror. 1160 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1161 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror); 1162 assert(archived_comp_mirror != NULL, "Must be"); 1163 } else { 1164 assert(k->is_objArray_klass(), "Must be"); 1165 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1166 assert(element_klass != NULL, "Must have an element klass"); 1167 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1168 if (archived_comp_mirror == NULL) { 1169 return NULL; 1170 } 1171 } 1172 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1173 } else { 1174 assert(k->is_instance_klass(), "Must be"); 1175 1176 // Reset local static fields in the mirror 1177 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1178 1179 java_lang_Class:set_init_lock(archived_mirror, NULL); 1180 1181 set_protection_domain(archived_mirror, NULL); 1182 } 1183 1184 // clear class loader and mirror_module_field 1185 set_class_loader(archived_mirror, NULL); 1186 set_module(archived_mirror, NULL); 1187 1188 // The archived mirror's field at _klass_offset is still pointing to the original 1189 // klass. Updated the field in the archived mirror to point to the relocated 1190 // klass in the archive. 1191 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1192 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1193 p2i(as_Klass(mirror)), p2i(reloc_k)); 1194 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1195 1196 // The field at _array_klass_offset is pointing to the original one dimension 1197 // higher array klass if exists. Relocate the pointer. 1198 Klass *arr = array_klass_acquire(mirror); 1199 if (arr != NULL) { 1200 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1201 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1202 p2i(arr), p2i(reloc_arr)); 1203 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1204 } 1205 return archived_mirror; 1206 } 1207 1208 // After the archived mirror object is restored, the shared klass' 1209 // _has_raw_archived_mirror flag is cleared 1210 void java_lang_Class::restore_archived_mirror(Klass *k, Handle mirror, 1211 Handle class_loader, Handle module, 1212 Handle protection_domain, TRAPS) { 1213 1214 // The java.lang.Class field offsets were archived and reloaded from archive. 1215 // No need to put classes on the fixup_mirror_list before java.lang.Class 1216 // is loaded. 1217 1218 if (!k->is_array_klass()) { 1219 // - local static final fields with initial values were initialized at dump time 1220 1221 // create the init_lock 1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 1223 set_init_lock(mirror(), r); 1224 1225 if (protection_domain.not_null()) { 1226 set_protection_domain(mirror(), protection_domain()); 1227 } 1228 } 1229 1230 assert(class_loader() == k->class_loader(), "should be same"); 1231 if (class_loader.not_null()) { 1232 set_class_loader(mirror(), class_loader()); 1233 } 1234 1235 k->set_java_mirror(mirror); 1236 k->clear_has_raw_archived_mirror(); 1237 1238 set_mirror_module_field(k, mirror, module, THREAD); 1239 1240 ResourceMark rm; 1241 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1242 } 1243 #endif // INCLUDE_CDS_JAVA_HEAP 1244 1245 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1246 assert(_module_offset != 0, "must have been computed already"); 1247 java_lang_Class::set_module(k->java_mirror(), module()); 1248 } 1249 1250 int java_lang_Class::oop_size(oop java_class) { 1251 assert(_oop_size_offset != 0, "must be set"); 1252 int size = java_class->int_field(_oop_size_offset); 1253 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1254 return size; 1255 } 1256 1257 void java_lang_Class::set_oop_size(oop java_class, int size) { 1258 assert(_oop_size_offset != 0, "must be set"); 1259 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1260 java_class->int_field_put(_oop_size_offset, size); 1261 } 1262 1263 int java_lang_Class::static_oop_field_count(oop java_class) { 1264 assert(_static_oop_field_count_offset != 0, "must be set"); 1265 return java_class->int_field(_static_oop_field_count_offset); 1266 } 1267 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1268 assert(_static_oop_field_count_offset != 0, "must be set"); 1269 java_class->int_field_put(_static_oop_field_count_offset, size); 1270 } 1271 1272 oop java_lang_Class::protection_domain(oop java_class) { 1273 assert(_protection_domain_offset != 0, "must be set"); 1274 return java_class->obj_field(_protection_domain_offset); 1275 } 1276 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1277 assert(_protection_domain_offset != 0, "must be set"); 1278 java_class->obj_field_put(_protection_domain_offset, pd); 1279 } 1280 1281 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1282 assert(_component_mirror_offset != 0, "must be set"); 1283 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1284 } 1285 oop java_lang_Class::component_mirror(oop java_class) { 1286 assert(_component_mirror_offset != 0, "must be set"); 1287 return java_class->obj_field(_component_mirror_offset); 1288 } 1289 1290 oop java_lang_Class::init_lock(oop java_class) { 1291 assert(_init_lock_offset != 0, "must be set"); 1292 return java_class->obj_field(_init_lock_offset); 1293 } 1294 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1295 assert(_init_lock_offset != 0, "must be set"); 1296 java_class->obj_field_put(_init_lock_offset, init_lock); 1297 } 1298 1299 objArrayOop java_lang_Class::signers(oop java_class) { 1300 assert(_signers_offset != 0, "must be set"); 1301 return (objArrayOop)java_class->obj_field(_signers_offset); 1302 } 1303 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1304 assert(_signers_offset != 0, "must be set"); 1305 java_class->obj_field_put(_signers_offset, (oop)signers); 1306 } 1307 1308 1309 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1310 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1311 if (_class_loader_offset != 0) { 1312 java_class->obj_field_put(_class_loader_offset, loader); 1313 } 1314 } 1315 1316 oop java_lang_Class::class_loader(oop java_class) { 1317 assert(_class_loader_offset != 0, "must be set"); 1318 return java_class->obj_field(_class_loader_offset); 1319 } 1320 1321 oop java_lang_Class::module(oop java_class) { 1322 assert(_module_offset != 0, "must be set"); 1323 return java_class->obj_field(_module_offset); 1324 } 1325 1326 void java_lang_Class::set_module(oop java_class, oop module) { 1327 assert(_module_offset != 0, "must be set"); 1328 java_class->obj_field_put(_module_offset, module); 1329 } 1330 1331 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1332 // This should be improved by adding a field at the Java level or by 1333 // introducing a new VM klass (see comment in ClassFileParser) 1334 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1335 if (type != T_VOID) { 1336 Klass* aklass = Universe::typeArrayKlassObj(type); 1337 assert(aklass != NULL, "correct bootstrap"); 1338 release_set_array_klass(java_class, aklass); 1339 } 1340 #ifdef ASSERT 1341 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1342 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1343 #endif 1344 return java_class; 1345 } 1346 1347 1348 Klass* java_lang_Class::as_Klass(oop java_class) { 1349 //%note memory_2 1350 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1351 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1352 assert(k == NULL || k->is_klass(), "type check"); 1353 return k; 1354 } 1355 1356 1357 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1358 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1359 java_class->metadata_field_put(_klass_offset, klass); 1360 } 1361 1362 1363 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1364 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1365 Symbol* name = NULL; 1366 bool is_instance = false; 1367 if (is_primitive(java_class)) { 1368 name = vmSymbols::type_signature(primitive_type(java_class)); 1369 } else { 1370 Klass* k = as_Klass(java_class); 1371 is_instance = k->is_instance_klass(); 1372 name = k->name(); 1373 } 1374 if (name == NULL) { 1375 st->print("<null>"); 1376 return; 1377 } 1378 if (is_instance) st->print("L"); 1379 st->write((char*) name->base(), (int) name->utf8_length()); 1380 if (is_instance) st->print(";"); 1381 } 1382 1383 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1384 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1385 Symbol* name; 1386 if (is_primitive(java_class)) { 1387 name = vmSymbols::type_signature(primitive_type(java_class)); 1388 // Because this can create a new symbol, the caller has to decrement 1389 // the refcount, so make adjustment here and below for symbols returned 1390 // that are not created or incremented due to a successful lookup. 1391 name->increment_refcount(); 1392 } else { 1393 Klass* k = as_Klass(java_class); 1394 if (!k->is_instance_klass()) { 1395 name = k->name(); 1396 name->increment_refcount(); 1397 } else { 1398 ResourceMark rm; 1399 const char* sigstr = k->signature_name(); 1400 int siglen = (int) strlen(sigstr); 1401 if (!intern_if_not_found) { 1402 name = SymbolTable::probe(sigstr, siglen); 1403 } else { 1404 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1405 } 1406 } 1407 } 1408 return name; 1409 } 1410 1411 // Returns the Java name for this Java mirror (Resource allocated) 1412 // See Klass::external_name(). 1413 // For primitive type Java mirrors, its type name is returned. 1414 const char* java_lang_Class::as_external_name(oop java_class) { 1415 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1416 const char* name = NULL; 1417 if (is_primitive(java_class)) { 1418 name = type2name(primitive_type(java_class)); 1419 } else { 1420 name = as_Klass(java_class)->external_name(); 1421 } 1422 if (name == NULL) { 1423 name = "<null>"; 1424 } 1425 return name; 1426 } 1427 1428 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1429 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1430 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1431 return k; 1432 } 1433 1434 1435 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1436 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1437 java_class->release_metadata_field_put(_array_klass_offset, klass); 1438 } 1439 1440 1441 bool java_lang_Class::is_primitive(oop java_class) { 1442 // should assert: 1443 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1444 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1445 1446 #ifdef ASSERT 1447 if (is_primitive) { 1448 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1449 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1450 "Should be either the T_VOID primitive or a java primitive"); 1451 } 1452 #endif 1453 1454 return is_primitive; 1455 } 1456 1457 1458 BasicType java_lang_Class::primitive_type(oop java_class) { 1459 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1460 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1461 BasicType type = T_VOID; 1462 if (ak != NULL) { 1463 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1464 type = ArrayKlass::cast(ak)->element_type(); 1465 } else { 1466 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1467 } 1468 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1469 return type; 1470 } 1471 1472 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1473 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1474 if (is_primitive(java_class)) { 1475 if (reference_klass != NULL) 1476 (*reference_klass) = NULL; 1477 return primitive_type(java_class); 1478 } else { 1479 if (reference_klass != NULL) 1480 (*reference_klass) = as_Klass(java_class); 1481 return T_OBJECT; 1482 } 1483 } 1484 1485 1486 oop java_lang_Class::primitive_mirror(BasicType t) { 1487 oop mirror = Universe::java_mirror(t); 1488 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1489 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1490 return mirror; 1491 } 1492 1493 bool java_lang_Class::offsets_computed = false; 1494 int java_lang_Class::classRedefinedCount_offset = -1; 1495 1496 #define CLASS_FIELDS_DO(macro) \ 1497 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1498 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1499 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1500 macro(_module_offset, k, "module", module_signature, false) 1501 1502 void java_lang_Class::compute_offsets() { 1503 if (offsets_computed) { 1504 return; 1505 } 1506 1507 offsets_computed = true; 1508 1509 InstanceKlass* k = SystemDictionary::Class_klass(); 1510 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1511 1512 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1513 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1514 // GC treats them the same. 1515 _init_lock_offset = _component_mirror_offset; 1516 1517 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1518 } 1519 1520 #if INCLUDE_CDS 1521 void java_lang_Class::serialize(SerializeClosure* f) { 1522 f->do_u4((u4*)&offsets_computed); 1523 f->do_u4((u4*)&_init_lock_offset); 1524 1525 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1526 1527 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1528 } 1529 #endif 1530 1531 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1532 if (classRedefinedCount_offset == -1) { 1533 // If we don't have an offset for it then just return -1 as a marker. 1534 return -1; 1535 } 1536 1537 return the_class_mirror->int_field(classRedefinedCount_offset); 1538 } 1539 1540 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1541 if (classRedefinedCount_offset == -1) { 1542 // If we don't have an offset for it then nothing to set. 1543 return; 1544 } 1545 1546 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1547 } 1548 1549 1550 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1551 // platform thread structure, and a eetop offset which was used for thread 1552 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1553 // merged, so in the HotSpot VM we just use the eetop field for the thread 1554 // instead of the privateInfo_offset. 1555 // 1556 // Note: The stackSize field is only present starting in 1.4. 1557 1558 int java_lang_Thread::_name_offset = 0; 1559 int java_lang_Thread::_group_offset = 0; 1560 int java_lang_Thread::_contextClassLoader_offset = 0; 1561 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1562 int java_lang_Thread::_priority_offset = 0; 1563 int java_lang_Thread::_eetop_offset = 0; 1564 int java_lang_Thread::_daemon_offset = 0; 1565 int java_lang_Thread::_stillborn_offset = 0; 1566 int java_lang_Thread::_stackSize_offset = 0; 1567 int java_lang_Thread::_tid_offset = 0; 1568 int java_lang_Thread::_continuation_offset = 0; 1569 int java_lang_Thread::_thread_status_offset = 0; 1570 int java_lang_Thread::_park_blocker_offset = 0; 1571 int java_lang_Thread::_park_event_offset = 0 ; 1572 1573 #define THREAD_FIELDS_DO(macro) \ 1574 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1575 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1576 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1577 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1578 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1579 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1580 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1581 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1582 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1583 macro(_tid_offset, k, "tid", long_signature, false); \ 1584 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1585 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1586 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false); \ 1587 macro(_continuation_offset, k, "cont", continuation_signature, false) 1588 1589 void java_lang_Thread::compute_offsets() { 1590 assert(_group_offset == 0, "offsets should be initialized only once"); 1591 1592 InstanceKlass* k = SystemDictionary::Thread_klass(); 1593 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1594 } 1595 1596 #if INCLUDE_CDS 1597 void java_lang_Thread::serialize(SerializeClosure* f) { 1598 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1599 } 1600 #endif 1601 1602 JavaThread* java_lang_Thread::thread(oop java_thread) { 1603 return (JavaThread*)java_thread->address_field(_eetop_offset); 1604 } 1605 1606 1607 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1608 java_thread->address_field_put(_eetop_offset, (address)thread); 1609 } 1610 1611 1612 oop java_lang_Thread::name(oop java_thread) { 1613 return java_thread->obj_field(_name_offset); 1614 } 1615 1616 1617 void java_lang_Thread::set_name(oop java_thread, oop name) { 1618 java_thread->obj_field_put(_name_offset, name); 1619 } 1620 1621 1622 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1623 return (ThreadPriority)java_thread->int_field(_priority_offset); 1624 } 1625 1626 1627 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1628 java_thread->int_field_put(_priority_offset, priority); 1629 } 1630 1631 1632 oop java_lang_Thread::threadGroup(oop java_thread) { 1633 return java_thread->obj_field(_group_offset); 1634 } 1635 1636 1637 bool java_lang_Thread::is_stillborn(oop java_thread) { 1638 return java_thread->bool_field(_stillborn_offset) != 0; 1639 } 1640 1641 1642 // We never have reason to turn the stillborn bit off 1643 void java_lang_Thread::set_stillborn(oop java_thread) { 1644 java_thread->bool_field_put(_stillborn_offset, true); 1645 } 1646 1647 1648 bool java_lang_Thread::is_alive(oop java_thread) { 1649 JavaThread* thr = java_lang_Thread::thread(java_thread); 1650 return (thr != NULL); 1651 } 1652 1653 1654 bool java_lang_Thread::is_daemon(oop java_thread) { 1655 return java_thread->bool_field(_daemon_offset) != 0; 1656 } 1657 1658 1659 void java_lang_Thread::set_daemon(oop java_thread) { 1660 java_thread->bool_field_put(_daemon_offset, true); 1661 } 1662 1663 oop java_lang_Thread::context_class_loader(oop java_thread) { 1664 return java_thread->obj_field(_contextClassLoader_offset); 1665 } 1666 1667 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1668 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1669 } 1670 1671 1672 jlong java_lang_Thread::stackSize(oop java_thread) { 1673 if (_stackSize_offset > 0) { 1674 return java_thread->long_field(_stackSize_offset); 1675 } else { 1676 return 0; 1677 } 1678 } 1679 1680 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1681 void java_lang_Thread::set_thread_status(oop java_thread, 1682 java_lang_Thread::ThreadStatus status) { 1683 // The threadStatus is only present starting in 1.5 1684 if (_thread_status_offset > 0) { 1685 java_thread->int_field_put(_thread_status_offset, status); 1686 } 1687 } 1688 1689 // Read thread status value from threadStatus field in java.lang.Thread java class. 1690 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1691 // Make sure the caller is operating on behalf of the VM or is 1692 // running VM code (state == _thread_in_vm). 1693 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1694 JavaThread::current()->thread_state() == _thread_in_vm, 1695 "Java Thread is not running in vm"); 1696 // The threadStatus is only present starting in 1.5 1697 if (_thread_status_offset > 0) { 1698 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1699 } else { 1700 // All we can easily figure out is if it is alive, but that is 1701 // enough info for a valid unknown status. 1702 // These aren't restricted to valid set ThreadStatus values, so 1703 // use JVMTI values and cast. 1704 JavaThread* thr = java_lang_Thread::thread(java_thread); 1705 if (thr == NULL) { 1706 // the thread hasn't run yet or is in the process of exiting 1707 return NEW; 1708 } 1709 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1710 } 1711 } 1712 1713 1714 jlong java_lang_Thread::thread_id(oop java_thread) { 1715 // The thread ID field is only present starting in 1.5 1716 if (_tid_offset > 0) { 1717 return java_thread->long_field(_tid_offset); 1718 } else { 1719 return 0; 1720 } 1721 } 1722 1723 oop java_lang_Thread::continuation(oop java_thread) { 1724 return java_thread->obj_field(_continuation_offset); 1725 } 1726 1727 void java_lang_Thread::set_continuation(oop java_thread, oop continuation) { 1728 return java_thread->obj_field_put(_continuation_offset, continuation); 1729 } 1730 1731 oop java_lang_Thread::park_blocker(oop java_thread) { 1732 assert(JDK_Version::current().supports_thread_park_blocker() && 1733 _park_blocker_offset != 0, "Must support parkBlocker field"); 1734 1735 if (_park_blocker_offset > 0) { 1736 return java_thread->obj_field(_park_blocker_offset); 1737 } 1738 1739 return NULL; 1740 } 1741 1742 jlong java_lang_Thread::park_event(oop java_thread) { 1743 if (_park_event_offset > 0) { 1744 return java_thread->long_field(_park_event_offset); 1745 } 1746 return 0; 1747 } 1748 1749 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1750 if (_park_event_offset > 0) { 1751 java_thread->long_field_put(_park_event_offset, ptr); 1752 return true; 1753 } 1754 return false; 1755 } 1756 1757 1758 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1759 assert(_thread_status_offset != 0, "Must have thread status"); 1760 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1761 switch (status) { 1762 case NEW : return "NEW"; 1763 case RUNNABLE : return "RUNNABLE"; 1764 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1765 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1766 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1767 case PARKED : return "WAITING (parking)"; 1768 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1769 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1770 case TERMINATED : return "TERMINATED"; 1771 default : return "UNKNOWN"; 1772 }; 1773 } 1774 int java_lang_ThreadGroup::_parent_offset = 0; 1775 int java_lang_ThreadGroup::_name_offset = 0; 1776 int java_lang_ThreadGroup::_threads_offset = 0; 1777 int java_lang_ThreadGroup::_groups_offset = 0; 1778 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1779 int java_lang_ThreadGroup::_destroyed_offset = 0; 1780 int java_lang_ThreadGroup::_daemon_offset = 0; 1781 int java_lang_ThreadGroup::_nthreads_offset = 0; 1782 int java_lang_ThreadGroup::_ngroups_offset = 0; 1783 1784 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1785 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1786 return java_thread_group->obj_field(_parent_offset); 1787 } 1788 1789 // ("name as oop" accessor is not necessary) 1790 1791 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1792 oop name = java_thread_group->obj_field(_name_offset); 1793 // ThreadGroup.name can be null 1794 if (name != NULL) { 1795 return java_lang_String::as_utf8_string(name); 1796 } 1797 return NULL; 1798 } 1799 1800 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1801 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1802 return java_thread_group->int_field(_nthreads_offset); 1803 } 1804 1805 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1806 oop threads = java_thread_group->obj_field(_threads_offset); 1807 assert(threads != NULL, "threadgroups should have threads"); 1808 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1809 return objArrayOop(threads); 1810 } 1811 1812 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1813 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1814 return java_thread_group->int_field(_ngroups_offset); 1815 } 1816 1817 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1818 oop groups = java_thread_group->obj_field(_groups_offset); 1819 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1820 return objArrayOop(groups); 1821 } 1822 1823 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1824 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1825 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1826 } 1827 1828 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1829 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1830 return java_thread_group->bool_field(_destroyed_offset) != 0; 1831 } 1832 1833 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1834 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1835 return java_thread_group->bool_field(_daemon_offset) != 0; 1836 } 1837 1838 #define THREADGROUP_FIELDS_DO(macro) \ 1839 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1840 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1841 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1842 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1843 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1844 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1845 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1846 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1847 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1848 1849 void java_lang_ThreadGroup::compute_offsets() { 1850 assert(_parent_offset == 0, "offsets should be initialized only once"); 1851 1852 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1853 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1854 } 1855 1856 #if INCLUDE_CDS 1857 void java_lang_ThreadGroup::serialize(SerializeClosure* f) { 1858 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1859 } 1860 #endif 1861 1862 #define THROWABLE_FIELDS_DO(macro) \ 1863 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1864 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1865 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1866 macro(depth_offset, k, "depth", int_signature, false); \ 1867 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1868 1869 void java_lang_Throwable::compute_offsets() { 1870 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1871 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1872 } 1873 1874 #if INCLUDE_CDS 1875 void java_lang_Throwable::serialize(SerializeClosure* f) { 1876 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1877 } 1878 #endif 1879 1880 oop java_lang_Throwable::unassigned_stacktrace() { 1881 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1882 oop base = ik->static_field_base_raw(); 1883 return base->obj_field(static_unassigned_stacktrace_offset); 1884 } 1885 1886 oop java_lang_Throwable::backtrace(oop throwable) { 1887 return throwable->obj_field_acquire(backtrace_offset); 1888 } 1889 1890 1891 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1892 throwable->release_obj_field_put(backtrace_offset, value); 1893 } 1894 1895 int java_lang_Throwable::depth(oop throwable) { 1896 return throwable->int_field(depth_offset); 1897 } 1898 1899 void java_lang_Throwable::set_depth(oop throwable, int value) { 1900 throwable->int_field_put(depth_offset, value); 1901 } 1902 1903 oop java_lang_Throwable::message(oop throwable) { 1904 return throwable->obj_field(detailMessage_offset); 1905 } 1906 1907 1908 // Return Symbol for detailed_message or NULL 1909 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1910 PRESERVE_EXCEPTION_MARK; // Keep original exception 1911 oop detailed_message = java_lang_Throwable::message(throwable); 1912 if (detailed_message != NULL) { 1913 return java_lang_String::as_symbol(detailed_message, THREAD); 1914 } 1915 return NULL; 1916 } 1917 1918 void java_lang_Throwable::set_message(oop throwable, oop value) { 1919 throwable->obj_field_put(detailMessage_offset, value); 1920 } 1921 1922 1923 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1924 throwable->obj_field_put(stackTrace_offset, st_element_array); 1925 } 1926 1927 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1928 set_stacktrace(throwable, NULL); 1929 } 1930 1931 1932 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1933 ResourceMark rm; 1934 Klass* k = throwable->klass(); 1935 assert(k != NULL, "just checking"); 1936 st->print("%s", k->external_name()); 1937 oop msg = message(throwable); 1938 if (msg != NULL) { 1939 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1940 } 1941 } 1942 1943 // After this many redefines, the stack trace is unreliable. 1944 const int MAX_VERSION = USHRT_MAX; 1945 1946 static inline bool version_matches(Method* method, int version) { 1947 assert(version < MAX_VERSION, "version is too big"); 1948 return method != NULL && (method->constants()->version() == version); 1949 } 1950 1951 1952 // This class provides a simple wrapper over the internal structure of 1953 // exception backtrace to insulate users of the backtrace from needing 1954 // to know what it looks like. 1955 class BacktraceBuilder: public StackObj { 1956 friend class BacktraceIterator; 1957 private: 1958 Handle _backtrace; 1959 objArrayOop _head; 1960 typeArrayOop _methods; 1961 typeArrayOop _bcis; 1962 objArrayOop _mirrors; 1963 typeArrayOop _names; // needed to insulate method name against redefinition 1964 int _index; 1965 NoSafepointVerifier _nsv; 1966 1967 enum { 1968 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1969 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1970 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1971 trace_names_offset = java_lang_Throwable::trace_names_offset, 1972 trace_next_offset = java_lang_Throwable::trace_next_offset, 1973 trace_size = java_lang_Throwable::trace_size, 1974 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1975 }; 1976 1977 // get info out of chunks 1978 static typeArrayOop get_methods(objArrayHandle chunk) { 1979 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1980 assert(methods != NULL, "method array should be initialized in backtrace"); 1981 return methods; 1982 } 1983 static typeArrayOop get_bcis(objArrayHandle chunk) { 1984 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1985 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1986 return bcis; 1987 } 1988 static objArrayOop get_mirrors(objArrayHandle chunk) { 1989 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1990 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1991 return mirrors; 1992 } 1993 static typeArrayOop get_names(objArrayHandle chunk) { 1994 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1995 assert(names != NULL, "names array should be initialized in backtrace"); 1996 return names; 1997 } 1998 1999 public: 2000 2001 // constructor for new backtrace 2002 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 2003 expand(CHECK); 2004 _backtrace = Handle(THREAD, _head); 2005 _index = 0; 2006 } 2007 2008 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2009 _methods = get_methods(backtrace); 2010 _bcis = get_bcis(backtrace); 2011 _mirrors = get_mirrors(backtrace); 2012 _names = get_names(backtrace); 2013 assert(_methods->length() == _bcis->length() && 2014 _methods->length() == _mirrors->length() && 2015 _mirrors->length() == _names->length(), 2016 "method and source information arrays should match"); 2017 2018 // head is the preallocated backtrace 2019 _head = backtrace(); 2020 _backtrace = Handle(thread, _head); 2021 _index = 0; 2022 } 2023 2024 void expand(TRAPS) { 2025 objArrayHandle old_head(THREAD, _head); 2026 PauseNoSafepointVerifier pnsv(&_nsv); 2027 2028 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2029 objArrayHandle new_head(THREAD, head); 2030 2031 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2032 typeArrayHandle new_methods(THREAD, methods); 2033 2034 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2035 typeArrayHandle new_bcis(THREAD, bcis); 2036 2037 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2038 objArrayHandle new_mirrors(THREAD, mirrors); 2039 2040 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2041 typeArrayHandle new_names(THREAD, names); 2042 2043 if (!old_head.is_null()) { 2044 old_head->obj_at_put(trace_next_offset, new_head()); 2045 } 2046 new_head->obj_at_put(trace_methods_offset, new_methods()); 2047 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2048 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2049 new_head->obj_at_put(trace_names_offset, new_names()); 2050 2051 _head = new_head(); 2052 _methods = new_methods(); 2053 _bcis = new_bcis(); 2054 _mirrors = new_mirrors(); 2055 _names = new_names(); 2056 _index = 0; 2057 } 2058 2059 oop backtrace() { 2060 return _backtrace(); 2061 } 2062 2063 inline void push(Method* method, int bci, TRAPS) { 2064 // Smear the -1 bci to 0 since the array only holds unsigned 2065 // shorts. The later line number lookup would just smear the -1 2066 // to a 0 even if it could be recorded. 2067 if (bci == SynchronizationEntryBCI) bci = 0; 2068 2069 if (_index >= trace_chunk_size) { 2070 methodHandle mhandle(THREAD, method); 2071 expand(CHECK); 2072 method = mhandle(); 2073 } 2074 2075 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2076 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2077 2078 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2079 // klass owning the symbols alive so their refcounts aren't decremented. 2080 Symbol* name = method->name(); 2081 _names->symbol_at_put(_index, name); 2082 2083 // We need to save the mirrors in the backtrace to keep the class 2084 // from being unloaded while we still have this stack trace. 2085 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2086 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2087 _index++; 2088 } 2089 2090 }; 2091 2092 struct BacktraceElement : public StackObj { 2093 int _method_id; 2094 int _bci; 2095 int _version; 2096 Symbol* _name; 2097 Handle _mirror; 2098 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2099 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 2100 }; 2101 2102 class BacktraceIterator : public StackObj { 2103 int _index; 2104 objArrayHandle _result; 2105 objArrayHandle _mirrors; 2106 typeArrayHandle _methods; 2107 typeArrayHandle _bcis; 2108 typeArrayHandle _names; 2109 2110 void init(objArrayHandle result, Thread* thread) { 2111 // Get method id, bci, version and mirror from chunk 2112 _result = result; 2113 if (_result.not_null()) { 2114 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2115 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2116 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2117 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2118 _index = 0; 2119 } 2120 } 2121 public: 2122 BacktraceIterator(objArrayHandle result, Thread* thread) { 2123 init(result, thread); 2124 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2125 } 2126 2127 BacktraceElement next(Thread* thread) { 2128 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2129 _methods->ushort_at(_index), 2130 Backtrace::version_at(_bcis->int_at(_index)), 2131 Backtrace::bci_at(_bcis->int_at(_index)), 2132 _names->symbol_at(_index)); 2133 _index++; 2134 2135 if (_index >= java_lang_Throwable::trace_chunk_size) { 2136 int next_offset = java_lang_Throwable::trace_next_offset; 2137 // Get next chunk 2138 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2139 init(result, thread); 2140 } 2141 return e; 2142 } 2143 2144 bool repeat() { 2145 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2146 } 2147 }; 2148 2149 2150 // Print stack trace element to resource allocated buffer 2151 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2152 int version, int bci, Symbol* name) { 2153 ResourceMark rm; 2154 2155 // Get strings and string lengths 2156 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2157 const char* klass_name = holder->external_name(); 2158 int buf_len = (int)strlen(klass_name); 2159 2160 char* method_name = name->as_C_string(); 2161 buf_len += (int)strlen(method_name); 2162 2163 char* source_file_name = NULL; 2164 Symbol* source = Backtrace::get_source_file_name(holder, version); 2165 if (source != NULL) { 2166 source_file_name = source->as_C_string(); 2167 buf_len += (int)strlen(source_file_name); 2168 } 2169 2170 char *module_name = NULL, *module_version = NULL; 2171 ModuleEntry* module = holder->module(); 2172 if (module->is_named()) { 2173 module_name = module->name()->as_C_string(); 2174 buf_len += (int)strlen(module_name); 2175 if (module->version() != NULL) { 2176 module_version = module->version()->as_C_string(); 2177 buf_len += (int)strlen(module_version); 2178 } 2179 } 2180 2181 // Allocate temporary buffer with extra space for formatting and line number 2182 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2183 2184 // Print stack trace line in buffer 2185 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2186 2187 // Print module information 2188 if (module_name != NULL) { 2189 if (module_version != NULL) { 2190 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2191 } else { 2192 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2193 } 2194 } 2195 2196 // The method can be NULL if the requested class version is gone 2197 Method* method = holder->method_with_orig_idnum(method_id, version); 2198 if (!version_matches(method, version)) { 2199 strcat(buf, "Redefined)"); 2200 } else { 2201 int line_number = Backtrace::get_line_number(method, bci); 2202 if (line_number == -2) { 2203 strcat(buf, "Native Method)"); 2204 } else { 2205 if (source_file_name != NULL && (line_number != -1)) { 2206 // Sourcename and linenumber 2207 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2208 } else if (source_file_name != NULL) { 2209 // Just sourcename 2210 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2211 } else { 2212 // Neither sourcename nor linenumber 2213 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2214 } 2215 CompiledMethod* nm = method->code(); 2216 if (WizardMode && nm != NULL) { 2217 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2218 } 2219 } 2220 } 2221 2222 st->print_cr("%s", buf); 2223 } 2224 2225 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2226 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2227 int method_id = method->orig_method_idnum(); 2228 int version = method->constants()->version(); 2229 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2230 } 2231 2232 /** 2233 * Print the throwable message and its stack trace plus all causes by walking the 2234 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2235 */ 2236 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2237 // First, print the message. 2238 print(throwable(), st); 2239 st->cr(); 2240 2241 // Now print the stack trace. 2242 Thread* THREAD = Thread::current(); 2243 while (throwable.not_null()) { 2244 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2245 if (result.is_null()) { 2246 st->print_raw_cr("\t<<no stack trace available>>"); 2247 return; 2248 } 2249 BacktraceIterator iter(result, THREAD); 2250 2251 while (iter.repeat()) { 2252 BacktraceElement bte = iter.next(THREAD); 2253 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2254 } 2255 { 2256 // Call getCause() which doesn't necessarily return the _cause field. 2257 EXCEPTION_MARK; 2258 JavaValue cause(T_OBJECT); 2259 JavaCalls::call_virtual(&cause, 2260 throwable, 2261 throwable->klass(), 2262 vmSymbols::getCause_name(), 2263 vmSymbols::void_throwable_signature(), 2264 THREAD); 2265 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2266 if (HAS_PENDING_EXCEPTION) { 2267 CLEAR_PENDING_EXCEPTION; 2268 throwable = Handle(); 2269 } else { 2270 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2271 if (throwable.not_null()) { 2272 st->print("Caused by: "); 2273 print(throwable(), st); 2274 st->cr(); 2275 } 2276 } 2277 } 2278 } 2279 } 2280 2281 /** 2282 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2283 */ 2284 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2285 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2286 JavaValue result(T_VOID); 2287 JavaCalls::call_virtual(&result, 2288 throwable, 2289 SystemDictionary::Throwable_klass(), 2290 vmSymbols::printStackTrace_name(), 2291 vmSymbols::void_method_signature(), 2292 THREAD); 2293 } 2294 2295 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2296 if (!StackTraceInThrowable) return; 2297 ResourceMark rm(THREAD); 2298 2299 // Start out by clearing the backtrace for this object, in case the VM 2300 // runs out of memory while allocating the stack trace 2301 set_backtrace(throwable(), NULL); 2302 // Clear lazily constructed Java level stacktrace if refilling occurs 2303 // This is unnecessary in 1.7+ but harmless 2304 clear_stacktrace(throwable()); 2305 2306 int max_depth = MaxJavaStackTraceDepth; 2307 JavaThread* thread = (JavaThread*)THREAD; 2308 2309 BacktraceBuilder bt(CHECK); 2310 2311 // If there is no Java frame just return the method that was being called 2312 // with bci 0 2313 if (!thread->has_last_Java_frame()) { 2314 if (max_depth >= 1 && method() != NULL) { 2315 bt.push(method(), 0, CHECK); 2316 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2317 set_depth(throwable(), 1); 2318 set_backtrace(throwable(), bt.backtrace()); 2319 } 2320 return; 2321 } 2322 2323 // Instead of using vframe directly, this version of fill_in_stack_trace 2324 // basically handles everything by hand. This significantly improved the 2325 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2326 // See bug 6333838 for more details. 2327 // The "ASSERT" here is to verify this method generates the exactly same stack 2328 // trace as utilizing vframe. 2329 #ifdef ASSERT 2330 vframeStream st(thread); 2331 methodHandle st_method(THREAD, st.method()); 2332 #endif 2333 int total_count = 0; 2334 RegisterMap map(thread, false); 2335 int decode_offset = 0; 2336 CompiledMethod* nm = NULL; 2337 bool skip_fillInStackTrace_check = false; 2338 bool skip_throwableInit_check = false; 2339 bool skip_hidden = !ShowHiddenFrames; 2340 2341 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2342 Method* method = NULL; 2343 int bci = 0; 2344 2345 // Compiled java method case. 2346 if (decode_offset != 0) { 2347 DebugInfoReadStream stream(nm, decode_offset); 2348 decode_offset = stream.read_int(); 2349 method = (Method*)nm->metadata_at(stream.read_int()); 2350 bci = stream.read_bci(); 2351 } else { 2352 if (fr.is_first_frame()) break; 2353 address pc = fr.pc(); 2354 if (fr.is_interpreted_frame()) { 2355 address bcp = fr.interpreter_frame_bcp(); 2356 method = fr.interpreter_frame_method(); 2357 bci = method->bci_from(bcp); 2358 fr = fr.sender(&map); 2359 } else { 2360 CodeBlob* cb = fr.cb(); 2361 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2362 // but non nmethod 2363 fr = fr.sender(&map); 2364 if (cb == NULL || !cb->is_compiled()) { 2365 continue; 2366 } 2367 nm = cb->as_compiled_method(); 2368 if (nm->method()->is_native()) { 2369 method = nm->method(); 2370 bci = 0; 2371 } else { 2372 PcDesc* pd = nm->pc_desc_at(pc); 2373 decode_offset = pd->scope_decode_offset(); 2374 // if decode_offset is not equal to 0, it will execute the 2375 // "compiled java method case" at the beginning of the loop. 2376 continue; 2377 } 2378 } 2379 } 2380 #ifdef ASSERT 2381 assert(st_method() == method && st.bci() == bci, 2382 "Wrong stack trace"); 2383 st.next(); 2384 // vframeStream::method isn't GC-safe so store off a copy 2385 // of the Method* in case we GC. 2386 if (!st.at_end()) { 2387 st_method = st.method(); 2388 } 2389 #endif 2390 2391 // the format of the stacktrace will be: 2392 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2393 // - 0 or more <init> methods for the exception class (skipped) 2394 // - rest of the stack 2395 2396 if (!skip_fillInStackTrace_check) { 2397 if (method->name() == vmSymbols::fillInStackTrace_name() && 2398 throwable->is_a(method->method_holder())) { 2399 continue; 2400 } 2401 else { 2402 skip_fillInStackTrace_check = true; // gone past them all 2403 } 2404 } 2405 if (!skip_throwableInit_check) { 2406 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2407 2408 // skip <init> methods of the exception class and superclasses 2409 // This is simlar to classic VM. 2410 if (method->name() == vmSymbols::object_initializer_name() && 2411 throwable->is_a(method->method_holder())) { 2412 continue; 2413 } else { 2414 // there are none or we've seen them all - either way stop checking 2415 skip_throwableInit_check = true; 2416 } 2417 } 2418 if (method->is_hidden()) { 2419 if (skip_hidden) continue; 2420 } 2421 bt.push(method, bci, CHECK); 2422 total_count++; 2423 } 2424 2425 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2426 2427 // Put completed stack trace into throwable object 2428 set_backtrace(throwable(), bt.backtrace()); 2429 set_depth(throwable(), total_count); 2430 } 2431 2432 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2433 // No-op if stack trace is disabled 2434 if (!StackTraceInThrowable) { 2435 return; 2436 } 2437 2438 // Disable stack traces for some preallocated out of memory errors 2439 if (!Universe::should_fill_in_stack_trace(throwable)) { 2440 return; 2441 } 2442 2443 PRESERVE_EXCEPTION_MARK; 2444 2445 JavaThread* thread = JavaThread::active(); 2446 fill_in_stack_trace(throwable, method, thread); 2447 // ignore exceptions thrown during stack trace filling 2448 CLEAR_PENDING_EXCEPTION; 2449 } 2450 2451 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2452 // Allocate stack trace - backtrace is created but not filled in 2453 2454 // No-op if stack trace is disabled 2455 if (!StackTraceInThrowable) return; 2456 BacktraceBuilder bt(CHECK); // creates a backtrace 2457 set_backtrace(throwable(), bt.backtrace()); 2458 } 2459 2460 2461 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2462 // Fill in stack trace into preallocated backtrace (no GC) 2463 2464 // No-op if stack trace is disabled 2465 if (!StackTraceInThrowable) return; 2466 2467 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2468 2469 JavaThread* THREAD = JavaThread::current(); 2470 2471 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2472 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2473 2474 ResourceMark rm(THREAD); 2475 vframeStream st(THREAD); 2476 2477 BacktraceBuilder bt(THREAD, backtrace); 2478 2479 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2480 // methods as preallocated errors aren't created by "java" code. 2481 2482 // fill in as much stack trace as possible 2483 int chunk_count = 0; 2484 for (;!st.at_end(); st.next()) { 2485 bt.push(st.method(), st.bci(), CHECK); 2486 chunk_count++; 2487 2488 // Bail-out for deep stacks 2489 if (chunk_count >= trace_chunk_size) break; 2490 } 2491 set_depth(throwable(), chunk_count); 2492 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2493 2494 // We support the Throwable immutability protocol defined for Java 7. 2495 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2496 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2497 } 2498 2499 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2500 objArrayHandle stack_trace_array_h, TRAPS) { 2501 2502 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2503 THROW(vmSymbols::java_lang_NullPointerException()); 2504 } 2505 2506 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2507 2508 if (stack_trace_array_h->length() != depth(throwable())) { 2509 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2510 } 2511 2512 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2513 BacktraceIterator iter(result, THREAD); 2514 2515 int index = 0; 2516 while (iter.repeat()) { 2517 BacktraceElement bte = iter.next(THREAD); 2518 2519 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2520 2521 if (stack_trace_element.is_null()) { 2522 THROW(vmSymbols::java_lang_NullPointerException()); 2523 } 2524 2525 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2526 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2527 2528 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2529 method, 2530 bte._version, 2531 bte._bci, 2532 bte._name, CHECK); 2533 } 2534 } 2535 2536 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2537 // Allocate java.lang.StackTraceElement instance 2538 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2539 assert(k != NULL, "must be loaded in 1.4+"); 2540 if (k->should_be_initialized()) { 2541 k->initialize(CHECK_0); 2542 } 2543 2544 Handle element = k->allocate_instance_handle(CHECK_0); 2545 2546 int version = method->constants()->version(); 2547 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2548 return element(); 2549 } 2550 2551 void java_lang_StackTraceElement::fill_in(Handle element, 2552 InstanceKlass* holder, const methodHandle& method, 2553 int version, int bci, Symbol* name, TRAPS) { 2554 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2555 2556 // Fill in class name 2557 ResourceMark rm(THREAD); 2558 const char* str = holder->external_name(); 2559 oop classname = StringTable::intern((char*) str, CHECK); 2560 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2561 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2562 2563 oop loader = holder->class_loader(); 2564 if (loader != NULL) { 2565 oop loader_name = java_lang_ClassLoader::name(loader); 2566 if (loader_name != NULL) 2567 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2568 } 2569 2570 // Fill in method name 2571 oop methodname = StringTable::intern(name, CHECK); 2572 java_lang_StackTraceElement::set_methodName(element(), methodname); 2573 2574 // Fill in module name and version 2575 ModuleEntry* module = holder->module(); 2576 if (module->is_named()) { 2577 oop module_name = StringTable::intern(module->name(), CHECK); 2578 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2579 oop module_version; 2580 if (module->version() != NULL) { 2581 module_version = StringTable::intern(module->version(), CHECK); 2582 } else { 2583 module_version = NULL; 2584 } 2585 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2586 } 2587 2588 if (method() == NULL || !version_matches(method(), version)) { 2589 // The method was redefined, accurate line number information isn't available 2590 java_lang_StackTraceElement::set_fileName(element(), NULL); 2591 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2592 } else { 2593 // Fill in source file name and line number. 2594 Symbol* source = Backtrace::get_source_file_name(holder, version); 2595 if (ShowHiddenFrames && source == NULL) 2596 source = vmSymbols::unknown_class_name(); 2597 oop filename = StringTable::intern(source, CHECK); 2598 java_lang_StackTraceElement::set_fileName(element(), filename); 2599 2600 int line_number = Backtrace::get_line_number(method, bci); 2601 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2602 } 2603 } 2604 2605 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2606 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2607 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2608 // we should expand MemberName::name when Throwable uses StackTrace 2609 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2610 return method; 2611 } 2612 2613 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2614 // set Method* or mid/cpref 2615 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2616 InstanceKlass* ik = method->method_holder(); 2617 CallInfo info(method(), ik, CHECK); 2618 MethodHandles::init_method_MemberName(mname, info); 2619 // set bci 2620 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2621 // method may be redefined; store the version 2622 int version = method->constants()->version(); 2623 assert((jushort)version == version, "version should be short"); 2624 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2625 } 2626 2627 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2628 ResourceMark rm(THREAD); 2629 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2630 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2631 InstanceKlass* holder = InstanceKlass::cast(clazz); 2632 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2633 2634 short version = stackFrame->short_field(_version_offset); 2635 short bci = stackFrame->short_field(_bci_offset); 2636 Symbol* name = method->name(); 2637 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2638 } 2639 2640 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2641 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2642 macro(_bci_offset, k, "bci", short_signature, false) 2643 2644 void java_lang_StackFrameInfo::compute_offsets() { 2645 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2646 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2647 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2648 } 2649 2650 #if INCLUDE_CDS 2651 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) { 2652 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2653 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2654 } 2655 #endif 2656 2657 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2658 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2659 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2660 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2661 macro(_mode_offset, k, "mode", int_signature, false) 2662 2663 void java_lang_LiveStackFrameInfo::compute_offsets() { 2664 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2665 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2666 } 2667 2668 #if INCLUDE_CDS 2669 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) { 2670 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2671 } 2672 #endif 2673 2674 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2675 macro(override_offset, k, "override", bool_signature, false) 2676 2677 void java_lang_reflect_AccessibleObject::compute_offsets() { 2678 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2679 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2680 } 2681 2682 #if INCLUDE_CDS 2683 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) { 2684 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2685 } 2686 #endif 2687 2688 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2689 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2690 return (jboolean) reflect->bool_field(override_offset); 2691 } 2692 2693 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2694 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2695 reflect->bool_field_put(override_offset, (int) value); 2696 } 2697 2698 #define METHOD_FIELDS_DO(macro) \ 2699 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2700 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2701 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2702 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2703 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2704 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2705 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2706 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2707 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2708 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2709 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2710 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2711 2712 void java_lang_reflect_Method::compute_offsets() { 2713 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2714 // The generic signature and annotations fields are only present in 1.5 2715 signature_offset = -1; 2716 annotations_offset = -1; 2717 parameter_annotations_offset = -1; 2718 annotation_default_offset = -1; 2719 type_annotations_offset = -1; 2720 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2721 } 2722 2723 #if INCLUDE_CDS 2724 void java_lang_reflect_Method::serialize(SerializeClosure* f) { 2725 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2726 } 2727 #endif 2728 2729 Handle java_lang_reflect_Method::create(TRAPS) { 2730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2731 Klass* klass = SystemDictionary::reflect_Method_klass(); 2732 // This class is eagerly initialized during VM initialization, since we keep a refence 2733 // to one of the methods 2734 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2735 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2736 } 2737 2738 oop java_lang_reflect_Method::clazz(oop reflect) { 2739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2740 return reflect->obj_field(clazz_offset); 2741 } 2742 2743 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2745 reflect->obj_field_put(clazz_offset, value); 2746 } 2747 2748 int java_lang_reflect_Method::slot(oop reflect) { 2749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2750 return reflect->int_field(slot_offset); 2751 } 2752 2753 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2755 reflect->int_field_put(slot_offset, value); 2756 } 2757 2758 oop java_lang_reflect_Method::name(oop method) { 2759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2760 return method->obj_field(name_offset); 2761 } 2762 2763 void java_lang_reflect_Method::set_name(oop method, oop value) { 2764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2765 method->obj_field_put(name_offset, value); 2766 } 2767 2768 oop java_lang_reflect_Method::return_type(oop method) { 2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2770 return method->obj_field(returnType_offset); 2771 } 2772 2773 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2775 method->obj_field_put(returnType_offset, value); 2776 } 2777 2778 oop java_lang_reflect_Method::parameter_types(oop method) { 2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2780 return method->obj_field(parameterTypes_offset); 2781 } 2782 2783 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2785 method->obj_field_put(parameterTypes_offset, value); 2786 } 2787 2788 oop java_lang_reflect_Method::exception_types(oop method) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 return method->obj_field(exceptionTypes_offset); 2791 } 2792 2793 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 method->obj_field_put(exceptionTypes_offset, value); 2796 } 2797 2798 int java_lang_reflect_Method::modifiers(oop method) { 2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2800 return method->int_field(modifiers_offset); 2801 } 2802 2803 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2805 method->int_field_put(modifiers_offset, value); 2806 } 2807 2808 bool java_lang_reflect_Method::has_signature_field() { 2809 return (signature_offset >= 0); 2810 } 2811 2812 oop java_lang_reflect_Method::signature(oop method) { 2813 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2814 assert(has_signature_field(), "signature field must be present"); 2815 return method->obj_field(signature_offset); 2816 } 2817 2818 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2820 assert(has_signature_field(), "signature field must be present"); 2821 method->obj_field_put(signature_offset, value); 2822 } 2823 2824 bool java_lang_reflect_Method::has_annotations_field() { 2825 return (annotations_offset >= 0); 2826 } 2827 2828 oop java_lang_reflect_Method::annotations(oop method) { 2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2830 assert(has_annotations_field(), "annotations field must be present"); 2831 return method->obj_field(annotations_offset); 2832 } 2833 2834 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2836 assert(has_annotations_field(), "annotations field must be present"); 2837 method->obj_field_put(annotations_offset, value); 2838 } 2839 2840 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2841 return (parameter_annotations_offset >= 0); 2842 } 2843 2844 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2846 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2847 return method->obj_field(parameter_annotations_offset); 2848 } 2849 2850 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2852 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2853 method->obj_field_put(parameter_annotations_offset, value); 2854 } 2855 2856 bool java_lang_reflect_Method::has_annotation_default_field() { 2857 return (annotation_default_offset >= 0); 2858 } 2859 2860 oop java_lang_reflect_Method::annotation_default(oop method) { 2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2862 assert(has_annotation_default_field(), "annotation default field must be present"); 2863 return method->obj_field(annotation_default_offset); 2864 } 2865 2866 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2868 assert(has_annotation_default_field(), "annotation default field must be present"); 2869 method->obj_field_put(annotation_default_offset, value); 2870 } 2871 2872 bool java_lang_reflect_Method::has_type_annotations_field() { 2873 return (type_annotations_offset >= 0); 2874 } 2875 2876 oop java_lang_reflect_Method::type_annotations(oop method) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 assert(has_type_annotations_field(), "type_annotations field must be present"); 2879 return method->obj_field(type_annotations_offset); 2880 } 2881 2882 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2884 assert(has_type_annotations_field(), "type_annotations field must be present"); 2885 method->obj_field_put(type_annotations_offset, value); 2886 } 2887 2888 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2889 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2890 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2891 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2892 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2893 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2894 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2895 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2896 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2897 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2898 2899 2900 void java_lang_reflect_Constructor::compute_offsets() { 2901 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2902 // The generic signature and annotations fields are only present in 1.5 2903 signature_offset = -1; 2904 annotations_offset = -1; 2905 parameter_annotations_offset = -1; 2906 type_annotations_offset = -1; 2907 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2908 } 2909 2910 #if INCLUDE_CDS 2911 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) { 2912 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2913 } 2914 #endif 2915 2916 Handle java_lang_reflect_Constructor::create(TRAPS) { 2917 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2918 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2919 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2920 InstanceKlass* ik = InstanceKlass::cast(k); 2921 // Ensure it is initialized 2922 ik->initialize(CHECK_NH); 2923 return ik->allocate_instance_handle(THREAD); 2924 } 2925 2926 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2928 return reflect->obj_field(clazz_offset); 2929 } 2930 2931 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2932 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2933 reflect->obj_field_put(clazz_offset, value); 2934 } 2935 2936 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2937 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2938 return constructor->obj_field(parameterTypes_offset); 2939 } 2940 2941 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2943 constructor->obj_field_put(parameterTypes_offset, value); 2944 } 2945 2946 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2948 return constructor->obj_field(exceptionTypes_offset); 2949 } 2950 2951 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2953 constructor->obj_field_put(exceptionTypes_offset, value); 2954 } 2955 2956 int java_lang_reflect_Constructor::slot(oop reflect) { 2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2958 return reflect->int_field(slot_offset); 2959 } 2960 2961 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2963 reflect->int_field_put(slot_offset, value); 2964 } 2965 2966 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2968 return constructor->int_field(modifiers_offset); 2969 } 2970 2971 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2973 constructor->int_field_put(modifiers_offset, value); 2974 } 2975 2976 bool java_lang_reflect_Constructor::has_signature_field() { 2977 return (signature_offset >= 0); 2978 } 2979 2980 oop java_lang_reflect_Constructor::signature(oop constructor) { 2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2982 assert(has_signature_field(), "signature field must be present"); 2983 return constructor->obj_field(signature_offset); 2984 } 2985 2986 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2988 assert(has_signature_field(), "signature field must be present"); 2989 constructor->obj_field_put(signature_offset, value); 2990 } 2991 2992 bool java_lang_reflect_Constructor::has_annotations_field() { 2993 return (annotations_offset >= 0); 2994 } 2995 2996 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2998 assert(has_annotations_field(), "annotations field must be present"); 2999 return constructor->obj_field(annotations_offset); 3000 } 3001 3002 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3004 assert(has_annotations_field(), "annotations field must be present"); 3005 constructor->obj_field_put(annotations_offset, value); 3006 } 3007 3008 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 3009 return (parameter_annotations_offset >= 0); 3010 } 3011 3012 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3014 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3015 return method->obj_field(parameter_annotations_offset); 3016 } 3017 3018 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3020 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3021 method->obj_field_put(parameter_annotations_offset, value); 3022 } 3023 3024 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3025 return (type_annotations_offset >= 0); 3026 } 3027 3028 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3030 assert(has_type_annotations_field(), "type_annotations field must be present"); 3031 return constructor->obj_field(type_annotations_offset); 3032 } 3033 3034 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3036 assert(has_type_annotations_field(), "type_annotations field must be present"); 3037 constructor->obj_field_put(type_annotations_offset, value); 3038 } 3039 3040 #define FIELD_FIELDS_DO(macro) \ 3041 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3042 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3043 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3044 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3045 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3046 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3047 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3048 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3049 3050 void java_lang_reflect_Field::compute_offsets() { 3051 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3052 // The generic signature and annotations fields are only present in 1.5 3053 signature_offset = -1; 3054 annotations_offset = -1; 3055 type_annotations_offset = -1; 3056 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3057 } 3058 3059 #if INCLUDE_CDS 3060 void java_lang_reflect_Field::serialize(SerializeClosure* f) { 3061 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3062 } 3063 #endif 3064 3065 Handle java_lang_reflect_Field::create(TRAPS) { 3066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3067 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3068 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3069 InstanceKlass* ik = InstanceKlass::cast(k); 3070 // Ensure it is initialized 3071 ik->initialize(CHECK_NH); 3072 return ik->allocate_instance_handle(THREAD); 3073 } 3074 3075 oop java_lang_reflect_Field::clazz(oop reflect) { 3076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3077 return reflect->obj_field(clazz_offset); 3078 } 3079 3080 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3082 reflect->obj_field_put(clazz_offset, value); 3083 } 3084 3085 oop java_lang_reflect_Field::name(oop field) { 3086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3087 return field->obj_field(name_offset); 3088 } 3089 3090 void java_lang_reflect_Field::set_name(oop field, oop value) { 3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3092 field->obj_field_put(name_offset, value); 3093 } 3094 3095 oop java_lang_reflect_Field::type(oop field) { 3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3097 return field->obj_field(type_offset); 3098 } 3099 3100 void java_lang_reflect_Field::set_type(oop field, oop value) { 3101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3102 field->obj_field_put(type_offset, value); 3103 } 3104 3105 int java_lang_reflect_Field::slot(oop reflect) { 3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3107 return reflect->int_field(slot_offset); 3108 } 3109 3110 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3112 reflect->int_field_put(slot_offset, value); 3113 } 3114 3115 int java_lang_reflect_Field::modifiers(oop field) { 3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3117 return field->int_field(modifiers_offset); 3118 } 3119 3120 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3122 field->int_field_put(modifiers_offset, value); 3123 } 3124 3125 bool java_lang_reflect_Field::has_signature_field() { 3126 return (signature_offset >= 0); 3127 } 3128 3129 oop java_lang_reflect_Field::signature(oop field) { 3130 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3131 assert(has_signature_field(), "signature field must be present"); 3132 return field->obj_field(signature_offset); 3133 } 3134 3135 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3137 assert(has_signature_field(), "signature field must be present"); 3138 field->obj_field_put(signature_offset, value); 3139 } 3140 3141 bool java_lang_reflect_Field::has_annotations_field() { 3142 return (annotations_offset >= 0); 3143 } 3144 3145 oop java_lang_reflect_Field::annotations(oop field) { 3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3147 assert(has_annotations_field(), "annotations field must be present"); 3148 return field->obj_field(annotations_offset); 3149 } 3150 3151 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3153 assert(has_annotations_field(), "annotations field must be present"); 3154 field->obj_field_put(annotations_offset, value); 3155 } 3156 3157 bool java_lang_reflect_Field::has_type_annotations_field() { 3158 return (type_annotations_offset >= 0); 3159 } 3160 3161 oop java_lang_reflect_Field::type_annotations(oop field) { 3162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3163 assert(has_type_annotations_field(), "type_annotations field must be present"); 3164 return field->obj_field(type_annotations_offset); 3165 } 3166 3167 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3169 assert(has_type_annotations_field(), "type_annotations field must be present"); 3170 field->obj_field_put(type_annotations_offset, value); 3171 } 3172 3173 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3174 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3175 3176 void reflect_ConstantPool::compute_offsets() { 3177 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3178 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3179 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3180 } 3181 3182 #if INCLUDE_CDS 3183 void reflect_ConstantPool::serialize(SerializeClosure* f) { 3184 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3185 } 3186 #endif 3187 3188 #define PARAMETER_FIELDS_DO(macro) \ 3189 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3190 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3191 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3192 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3193 3194 void java_lang_reflect_Parameter::compute_offsets() { 3195 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3196 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3197 } 3198 3199 #if INCLUDE_CDS 3200 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) { 3201 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3202 } 3203 #endif 3204 3205 Handle java_lang_reflect_Parameter::create(TRAPS) { 3206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3207 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3208 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3209 InstanceKlass* ik = InstanceKlass::cast(k); 3210 // Ensure it is initialized 3211 ik->initialize(CHECK_NH); 3212 return ik->allocate_instance_handle(THREAD); 3213 } 3214 3215 oop java_lang_reflect_Parameter::name(oop param) { 3216 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3217 return param->obj_field(name_offset); 3218 } 3219 3220 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3222 param->obj_field_put(name_offset, value); 3223 } 3224 3225 int java_lang_reflect_Parameter::modifiers(oop param) { 3226 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3227 return param->int_field(modifiers_offset); 3228 } 3229 3230 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3231 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3232 param->int_field_put(modifiers_offset, value); 3233 } 3234 3235 int java_lang_reflect_Parameter::index(oop param) { 3236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3237 return param->int_field(index_offset); 3238 } 3239 3240 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3241 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3242 param->int_field_put(index_offset, value); 3243 } 3244 3245 oop java_lang_reflect_Parameter::executable(oop param) { 3246 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3247 return param->obj_field(executable_offset); 3248 } 3249 3250 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3252 param->obj_field_put(executable_offset, value); 3253 } 3254 3255 3256 int java_lang_Module::loader_offset; 3257 int java_lang_Module::name_offset; 3258 int java_lang_Module::_module_entry_offset = -1; 3259 3260 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3262 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3263 vmSymbols::java_lang_module_init_signature(), 3264 loader, module_name, CHECK_NH); 3265 } 3266 3267 #define MODULE_FIELDS_DO(macro) \ 3268 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3269 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3270 3271 void java_lang_Module::compute_offsets() { 3272 InstanceKlass* k = SystemDictionary::Module_klass(); 3273 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3274 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3275 } 3276 3277 #if INCLUDE_CDS 3278 void java_lang_Module::serialize(SerializeClosure* f) { 3279 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3280 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3281 } 3282 #endif 3283 3284 oop java_lang_Module::loader(oop module) { 3285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3286 return module->obj_field(loader_offset); 3287 } 3288 3289 void java_lang_Module::set_loader(oop module, oop value) { 3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3291 module->obj_field_put(loader_offset, value); 3292 } 3293 3294 oop java_lang_Module::name(oop module) { 3295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3296 return module->obj_field(name_offset); 3297 } 3298 3299 void java_lang_Module::set_name(oop module, oop value) { 3300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3301 module->obj_field_put(name_offset, value); 3302 } 3303 3304 ModuleEntry* java_lang_Module::module_entry(oop module) { 3305 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3306 assert(module != NULL, "module can't be null"); 3307 assert(oopDesc::is_oop(module), "module must be oop"); 3308 3309 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3310 if (module_entry == NULL) { 3311 // If the inject field containing the ModuleEntry* is null then return the 3312 // class loader's unnamed module. 3313 oop loader = java_lang_Module::loader(module); 3314 Handle h_loader = Handle(Thread::current(), loader); 3315 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3316 return loader_cld->unnamed_module(); 3317 } 3318 return module_entry; 3319 } 3320 3321 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3322 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3323 assert(module != NULL, "module can't be null"); 3324 assert(oopDesc::is_oop(module), "module must be oop"); 3325 module->address_field_put(_module_entry_offset, (address)module_entry); 3326 } 3327 3328 Handle reflect_ConstantPool::create(TRAPS) { 3329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3330 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3331 // Ensure it is initialized 3332 k->initialize(CHECK_NH); 3333 return k->allocate_instance_handle(THREAD); 3334 } 3335 3336 3337 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3339 oop mirror = value->pool_holder()->java_mirror(); 3340 // Save the mirror to get back the constant pool. 3341 reflect->obj_field_put(_oop_offset, mirror); 3342 } 3343 3344 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3346 3347 oop mirror = reflect->obj_field(_oop_offset); 3348 Klass* k = java_lang_Class::as_Klass(mirror); 3349 assert(k->is_instance_klass(), "Must be"); 3350 3351 // Get the constant pool back from the klass. Since class redefinition 3352 // merges the new constant pool into the old, this is essentially the 3353 // same constant pool as the original. If constant pool merging is 3354 // no longer done in the future, this will have to change to save 3355 // the original. 3356 return InstanceKlass::cast(k)->constants(); 3357 } 3358 3359 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3360 macro(_base_offset, k, "base", object_signature, false) 3361 3362 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3363 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3364 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3365 } 3366 3367 #if INCLUDE_CDS 3368 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) { 3369 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3370 } 3371 #endif 3372 3373 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3374 Klass* k = SystemDictionary::box_klass(type); 3375 if (k == NULL) return NULL; 3376 InstanceKlass* ik = InstanceKlass::cast(k); 3377 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3378 return ik->allocate_instance(THREAD); 3379 } 3380 3381 3382 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3383 oop box = initialize_and_allocate(type, CHECK_0); 3384 if (box == NULL) return NULL; 3385 switch (type) { 3386 case T_BOOLEAN: 3387 box->bool_field_put(value_offset, value->z); 3388 break; 3389 case T_CHAR: 3390 box->char_field_put(value_offset, value->c); 3391 break; 3392 case T_FLOAT: 3393 box->float_field_put(value_offset, value->f); 3394 break; 3395 case T_DOUBLE: 3396 box->double_field_put(long_value_offset, value->d); 3397 break; 3398 case T_BYTE: 3399 box->byte_field_put(value_offset, value->b); 3400 break; 3401 case T_SHORT: 3402 box->short_field_put(value_offset, value->s); 3403 break; 3404 case T_INT: 3405 box->int_field_put(value_offset, value->i); 3406 break; 3407 case T_LONG: 3408 box->long_field_put(long_value_offset, value->j); 3409 break; 3410 default: 3411 return NULL; 3412 } 3413 return box; 3414 } 3415 3416 3417 BasicType java_lang_boxing_object::basic_type(oop box) { 3418 if (box == NULL) return T_ILLEGAL; 3419 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3420 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3421 return T_ILLEGAL; 3422 return type; 3423 } 3424 3425 3426 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3427 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3428 switch (type) { 3429 case T_BOOLEAN: 3430 value->z = box->bool_field(value_offset); 3431 break; 3432 case T_CHAR: 3433 value->c = box->char_field(value_offset); 3434 break; 3435 case T_FLOAT: 3436 value->f = box->float_field(value_offset); 3437 break; 3438 case T_DOUBLE: 3439 value->d = box->double_field(long_value_offset); 3440 break; 3441 case T_BYTE: 3442 value->b = box->byte_field(value_offset); 3443 break; 3444 case T_SHORT: 3445 value->s = box->short_field(value_offset); 3446 break; 3447 case T_INT: 3448 value->i = box->int_field(value_offset); 3449 break; 3450 case T_LONG: 3451 value->j = box->long_field(long_value_offset); 3452 break; 3453 default: 3454 return T_ILLEGAL; 3455 } // end switch 3456 return type; 3457 } 3458 3459 3460 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3461 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3462 switch (type) { 3463 case T_BOOLEAN: 3464 box->bool_field_put(value_offset, value->z); 3465 break; 3466 case T_CHAR: 3467 box->char_field_put(value_offset, value->c); 3468 break; 3469 case T_FLOAT: 3470 box->float_field_put(value_offset, value->f); 3471 break; 3472 case T_DOUBLE: 3473 box->double_field_put(long_value_offset, value->d); 3474 break; 3475 case T_BYTE: 3476 box->byte_field_put(value_offset, value->b); 3477 break; 3478 case T_SHORT: 3479 box->short_field_put(value_offset, value->s); 3480 break; 3481 case T_INT: 3482 box->int_field_put(value_offset, value->i); 3483 break; 3484 case T_LONG: 3485 box->long_field_put(long_value_offset, value->j); 3486 break; 3487 default: 3488 return T_ILLEGAL; 3489 } // end switch 3490 return type; 3491 } 3492 3493 3494 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3495 switch (type) { 3496 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3497 case T_CHAR: st->print("%d", value->c); break; 3498 case T_BYTE: st->print("%d", value->b); break; 3499 case T_SHORT: st->print("%d", value->s); break; 3500 case T_INT: st->print("%d", value->i); break; 3501 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3502 case T_FLOAT: st->print("%f", value->f); break; 3503 case T_DOUBLE: st->print("%lf", value->d); break; 3504 default: st->print("type %d?", type); break; 3505 } 3506 } 3507 3508 // Support for java_lang_ref_Reference 3509 3510 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3511 assert(obj != NULL, "sanity"); 3512 if (offset != java_lang_ref_Reference::referent_offset) { 3513 return false; 3514 } 3515 3516 Klass* k = obj->klass(); 3517 if (!k->is_instance_klass()) { 3518 return false; 3519 } 3520 3521 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3522 bool is_reference = ik->reference_type() != REF_NONE; 3523 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3524 return is_reference; 3525 } 3526 3527 // Support for java_lang_ref_SoftReference 3528 // 3529 3530 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3531 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3532 macro(static_clock_offset, k, "clock", long_signature, true) 3533 3534 void java_lang_ref_SoftReference::compute_offsets() { 3535 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3536 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3537 } 3538 3539 #if INCLUDE_CDS 3540 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) { 3541 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3542 } 3543 #endif 3544 3545 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3546 return ref->long_field(timestamp_offset); 3547 } 3548 3549 jlong java_lang_ref_SoftReference::clock() { 3550 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3551 oop base = ik->static_field_base_raw(); 3552 return base->long_field(static_clock_offset); 3553 } 3554 3555 void java_lang_ref_SoftReference::set_clock(jlong value) { 3556 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3557 oop base = ik->static_field_base_raw(); 3558 base->long_field_put(static_clock_offset, value); 3559 } 3560 3561 // Support for java_lang_invoke_DirectMethodHandle 3562 3563 int java_lang_invoke_DirectMethodHandle::_member_offset; 3564 3565 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3566 oop member_name = NULL; 3567 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3568 "a DirectMethodHandle oop is expected"); 3569 return dmh->obj_field(member_offset_in_bytes()); 3570 } 3571 3572 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3573 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3574 3575 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3576 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3577 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3578 } 3579 3580 #if INCLUDE_CDS 3581 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) { 3582 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3583 } 3584 #endif 3585 3586 // Support for java_lang_invoke_MethodHandle 3587 3588 int java_lang_invoke_MethodHandle::_type_offset; 3589 int java_lang_invoke_MethodHandle::_form_offset; 3590 3591 int java_lang_invoke_MemberName::_clazz_offset; 3592 int java_lang_invoke_MemberName::_name_offset; 3593 int java_lang_invoke_MemberName::_type_offset; 3594 int java_lang_invoke_MemberName::_flags_offset; 3595 int java_lang_invoke_MemberName::_method_offset; 3596 int java_lang_invoke_MemberName::_vmindex_offset; 3597 3598 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3599 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3600 3601 int java_lang_invoke_LambdaForm::_vmentry_offset; 3602 3603 #define METHODHANDLE_FIELDS_DO(macro) \ 3604 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3605 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3606 3607 void java_lang_invoke_MethodHandle::compute_offsets() { 3608 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3609 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3610 } 3611 3612 #if INCLUDE_CDS 3613 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) { 3614 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3615 } 3616 #endif 3617 3618 #define MEMBERNAME_FIELDS_DO(macro) \ 3619 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3620 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3621 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3622 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3623 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3624 3625 void java_lang_invoke_MemberName::compute_offsets() { 3626 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3627 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3628 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3629 } 3630 3631 #if INCLUDE_CDS 3632 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) { 3633 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3634 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3635 } 3636 #endif 3637 3638 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3639 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3640 assert(k != NULL, "jdk mismatch"); 3641 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3642 } 3643 3644 #if INCLUDE_CDS 3645 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) { 3646 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3647 } 3648 #endif 3649 3650 #define LAMBDAFORM_FIELDS_DO(macro) \ 3651 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3652 3653 void java_lang_invoke_LambdaForm::compute_offsets() { 3654 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3655 assert (k != NULL, "jdk mismatch"); 3656 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3657 } 3658 3659 #if INCLUDE_CDS 3660 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) { 3661 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3662 } 3663 #endif 3664 3665 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3666 return obj != NULL && is_subclass(obj->klass()); 3667 } 3668 3669 3670 oop java_lang_invoke_MethodHandle::type(oop mh) { 3671 return mh->obj_field(_type_offset); 3672 } 3673 3674 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3675 mh->obj_field_put(_type_offset, mtype); 3676 } 3677 3678 oop java_lang_invoke_MethodHandle::form(oop mh) { 3679 assert(_form_offset != 0, ""); 3680 return mh->obj_field(_form_offset); 3681 } 3682 3683 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3684 assert(_form_offset != 0, ""); 3685 mh->obj_field_put(_form_offset, lform); 3686 } 3687 3688 /// MemberName accessors 3689 3690 oop java_lang_invoke_MemberName::clazz(oop mname) { 3691 assert(is_instance(mname), "wrong type"); 3692 return mname->obj_field(_clazz_offset); 3693 } 3694 3695 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3696 assert(is_instance(mname), "wrong type"); 3697 mname->obj_field_put(_clazz_offset, clazz); 3698 } 3699 3700 oop java_lang_invoke_MemberName::name(oop mname) { 3701 assert(is_instance(mname), "wrong type"); 3702 return mname->obj_field(_name_offset); 3703 } 3704 3705 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3706 assert(is_instance(mname), "wrong type"); 3707 mname->obj_field_put(_name_offset, name); 3708 } 3709 3710 oop java_lang_invoke_MemberName::type(oop mname) { 3711 assert(is_instance(mname), "wrong type"); 3712 return mname->obj_field(_type_offset); 3713 } 3714 3715 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3716 assert(is_instance(mname), "wrong type"); 3717 mname->obj_field_put(_type_offset, type); 3718 } 3719 3720 int java_lang_invoke_MemberName::flags(oop mname) { 3721 assert(is_instance(mname), "wrong type"); 3722 return mname->int_field(_flags_offset); 3723 } 3724 3725 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3726 assert(is_instance(mname), "wrong type"); 3727 mname->int_field_put(_flags_offset, flags); 3728 } 3729 3730 3731 // Return vmtarget from ResolvedMethodName method field through indirection 3732 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3733 assert(is_instance(mname), "wrong type"); 3734 oop method = mname->obj_field(_method_offset); 3735 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3736 } 3737 3738 bool java_lang_invoke_MemberName::is_method(oop mname) { 3739 assert(is_instance(mname), "must be MemberName"); 3740 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3741 } 3742 3743 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3744 assert(is_instance(mname), "wrong type"); 3745 mname->obj_field_put(_method_offset, resolved_method); 3746 } 3747 3748 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3749 assert(is_instance(mname), "wrong type"); 3750 return (intptr_t) mname->address_field(_vmindex_offset); 3751 } 3752 3753 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3754 assert(is_instance(mname), "wrong type"); 3755 mname->address_field_put(_vmindex_offset, (address) index); 3756 } 3757 3758 3759 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3760 assert(is_instance(resolved_method), "wrong type"); 3761 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3762 assert(m->is_method(), "must be"); 3763 return m; 3764 } 3765 3766 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3767 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3768 assert(is_instance(resolved_method), "wrong type"); 3769 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3770 } 3771 3772 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3773 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3774 oop resolved_method = ResolvedMethodTable::find_method(m()); 3775 if (resolved_method == NULL) { 3776 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3777 if (!k->is_initialized()) { 3778 k->initialize(CHECK_NULL); 3779 } 3780 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3781 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3782 // Add a reference to the loader (actually mirror because anonymous classes will not have 3783 // distinct loaders) to ensure the metadata is kept alive. 3784 // This mirror may be different than the one in clazz field. 3785 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3786 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3787 } 3788 return resolved_method; 3789 } 3790 3791 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3792 assert(is_instance(lform), "wrong type"); 3793 return lform->obj_field(_vmentry_offset); 3794 } 3795 3796 3797 // Support for java_lang_invoke_MethodType 3798 3799 int java_lang_invoke_MethodType::_rtype_offset; 3800 int java_lang_invoke_MethodType::_ptypes_offset; 3801 3802 #define METHODTYPE_FIELDS_DO(macro) \ 3803 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3804 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3805 3806 void java_lang_invoke_MethodType::compute_offsets() { 3807 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3808 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3809 } 3810 3811 #if INCLUDE_CDS 3812 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) { 3813 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3814 } 3815 #endif 3816 3817 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3818 st->print("("); 3819 objArrayOop pts = ptypes(mt); 3820 for (int i = 0, limit = pts->length(); i < limit; i++) { 3821 java_lang_Class::print_signature(pts->obj_at(i), st); 3822 } 3823 st->print(")"); 3824 java_lang_Class::print_signature(rtype(mt), st); 3825 } 3826 3827 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3828 ResourceMark rm; 3829 stringStream buffer(128); 3830 print_signature(mt, &buffer); 3831 const char* sigstr = buffer.base(); 3832 int siglen = (int) buffer.size(); 3833 Symbol *name; 3834 if (!intern_if_not_found) { 3835 name = SymbolTable::probe(sigstr, siglen); 3836 } else { 3837 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3838 } 3839 return name; 3840 } 3841 3842 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3843 if (oopDesc::equals(mt1, mt2)) 3844 return true; 3845 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3846 return false; 3847 if (ptype_count(mt1) != ptype_count(mt2)) 3848 return false; 3849 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3850 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3851 return false; 3852 } 3853 return true; 3854 } 3855 3856 oop java_lang_invoke_MethodType::rtype(oop mt) { 3857 assert(is_instance(mt), "must be a MethodType"); 3858 return mt->obj_field(_rtype_offset); 3859 } 3860 3861 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3862 assert(is_instance(mt), "must be a MethodType"); 3863 return (objArrayOop) mt->obj_field(_ptypes_offset); 3864 } 3865 3866 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3867 return ptypes(mt)->obj_at(idx); 3868 } 3869 3870 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3871 return ptypes(mt)->length(); 3872 } 3873 3874 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3875 objArrayOop pts = ptypes(mt); 3876 int count = pts->length(); 3877 int slots = 0; 3878 for (int i = 0; i < count; i++) { 3879 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3880 slots += type2size[bt]; 3881 } 3882 return slots; 3883 } 3884 3885 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3886 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3887 return type2size[bt]; 3888 } 3889 3890 3891 // Support for java_lang_invoke_CallSite 3892 3893 int java_lang_invoke_CallSite::_target_offset; 3894 int java_lang_invoke_CallSite::_context_offset; 3895 3896 #define CALLSITE_FIELDS_DO(macro) \ 3897 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3898 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3899 3900 void java_lang_invoke_CallSite::compute_offsets() { 3901 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3902 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3903 } 3904 3905 #if INCLUDE_CDS 3906 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) { 3907 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3908 } 3909 #endif 3910 3911 oop java_lang_invoke_CallSite::context(oop call_site) { 3912 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3913 3914 oop dep_oop = call_site->obj_field(_context_offset); 3915 return dep_oop; 3916 } 3917 3918 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3919 3920 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3921 3922 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3923 InstanceKlass* k = SystemDictionary::Context_klass(); 3924 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3925 } 3926 3927 #if INCLUDE_CDS 3928 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) { 3929 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3930 } 3931 #endif 3932 3933 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3934 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3935 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3936 DependencyContext dep_ctx(vmdeps_addr); 3937 return dep_ctx; 3938 } 3939 3940 // Support for java_security_AccessControlContext 3941 3942 int java_security_AccessControlContext::_context_offset = 0; 3943 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3944 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3945 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3946 3947 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3948 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3949 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3950 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3951 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3952 3953 void java_security_AccessControlContext::compute_offsets() { 3954 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3955 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3956 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3957 } 3958 3959 #if INCLUDE_CDS 3960 void java_security_AccessControlContext::serialize(SerializeClosure* f) { 3961 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3962 } 3963 #endif 3964 3965 bool java_security_AccessControlContext::is_authorized(Handle context) { 3966 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3967 assert(_isAuthorized_offset != -1, "should be set"); 3968 return context->bool_field(_isAuthorized_offset) != 0; 3969 } 3970 3971 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3972 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3973 // Ensure klass is initialized 3974 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3975 // Allocate result 3976 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3977 // Fill in values 3978 result->obj_field_put(_context_offset, context()); 3979 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3980 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3981 // whitelist AccessControlContexts created by the JVM if present 3982 if (_isAuthorized_offset != -1) { 3983 result->bool_field_put(_isAuthorized_offset, true); 3984 } 3985 return result; 3986 } 3987 3988 3989 // Support for java_lang_ClassLoader 3990 3991 bool java_lang_ClassLoader::offsets_computed = false; 3992 int java_lang_ClassLoader::_loader_data_offset = -1; 3993 int java_lang_ClassLoader::parallelCapable_offset = -1; 3994 int java_lang_ClassLoader::name_offset = -1; 3995 int java_lang_ClassLoader::unnamedModule_offset = -1; 3996 3997 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3998 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3999 return HeapAccess<>::load_at(loader, _loader_data_offset); 4000 } 4001 4002 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) { 4003 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4004 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data); 4005 } 4006 4007 #define CLASSLOADER_FIELDS_DO(macro) \ 4008 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4009 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4010 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4011 macro(parent_offset, k1, "parent", classloader_signature, false) 4012 4013 void java_lang_ClassLoader::compute_offsets() { 4014 assert(!offsets_computed, "offsets should be initialized only once"); 4015 offsets_computed = true; 4016 4017 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4018 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4019 4020 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4021 } 4022 4023 #if INCLUDE_CDS 4024 void java_lang_ClassLoader::serialize(SerializeClosure* f) { 4025 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4026 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4027 } 4028 #endif 4029 4030 oop java_lang_ClassLoader::parent(oop loader) { 4031 assert(is_instance(loader), "loader must be oop"); 4032 return loader->obj_field(parent_offset); 4033 } 4034 4035 oop java_lang_ClassLoader::name(oop loader) { 4036 assert(is_instance(loader), "loader must be oop"); 4037 return loader->obj_field(name_offset); 4038 } 4039 4040 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4041 assert(is_instance(loader), "loader must be oop"); 4042 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4043 oop acl = loader; 4044 debug_only(jint loop_count = 0); 4045 // This loop taken verbatim from ClassLoader.java: 4046 do { 4047 acl = parent(acl); 4048 if (oopDesc::equals(cl, acl)) { 4049 return true; 4050 } 4051 assert(++loop_count > 0, "loop_count overflow"); 4052 } while (acl != NULL); 4053 return false; 4054 } 4055 4056 bool java_lang_ClassLoader::is_instance(oop obj) { 4057 return obj != NULL && is_subclass(obj->klass()); 4058 } 4059 4060 4061 // For class loader classes, parallelCapable defined 4062 // based on non-null field 4063 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4064 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4065 if (parallelCapable_offset == -1) { 4066 // Default for backward compatibility is false 4067 return false; 4068 } 4069 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4070 } 4071 4072 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4073 // Fix for 4474172; see evaluation for more details 4074 loader = non_reflection_class_loader(loader); 4075 4076 oop cl = SystemDictionary::java_system_loader(); 4077 while(cl != NULL) { 4078 if (oopDesc::equals(cl, loader)) return true; 4079 cl = parent(cl); 4080 } 4081 return false; 4082 } 4083 4084 // Return true if this is one of the class loaders associated with 4085 // the generated bytecodes for reflection. 4086 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4087 if (loader != NULL) { 4088 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4089 // This might be null in non-1.4 JDKs 4090 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4091 } 4092 return false; 4093 } 4094 4095 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4096 // See whether this is one of the class loaders associated with 4097 // the generated bytecodes for reflection, and if so, "magically" 4098 // delegate to its parent to prevent class loading from occurring 4099 // in places where applications using reflection didn't expect it. 4100 if (is_reflection_class_loader(loader)) { 4101 return parent(loader); 4102 } 4103 return loader; 4104 } 4105 4106 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4107 assert(is_instance(loader), "loader must be oop"); 4108 return loader->obj_field(unnamedModule_offset); 4109 } 4110 4111 // Caller needs ResourceMark. 4112 const char* java_lang_ClassLoader::describe_external(const oop loader) { 4113 if (loader == NULL) { 4114 return "<bootstrap>"; 4115 } 4116 4117 bool well_known_loader = SystemDictionary::is_system_class_loader(loader) || 4118 SystemDictionary::is_platform_class_loader(loader); 4119 4120 const char* name = NULL; 4121 oop nameOop = java_lang_ClassLoader::name(loader); 4122 if (nameOop != NULL) { 4123 name = java_lang_String::as_utf8_string(nameOop); 4124 } 4125 if (name == NULL) { 4126 // Use placeholder for missing name to have fixed message format. 4127 name = "<unnamed>"; 4128 } 4129 4130 stringStream ss; 4131 ss.print("\"%s\" (instance of %s", name, loader->klass()->external_name()); 4132 if (!well_known_loader) { 4133 const char* parentName = NULL; 4134 oop pl = java_lang_ClassLoader::parent(loader); 4135 if (pl != NULL) { 4136 oop parentNameOop = java_lang_ClassLoader::name(pl); 4137 if (parentNameOop != NULL) { 4138 parentName = java_lang_String::as_utf8_string(parentNameOop); 4139 } 4140 if (parentName == NULL) { 4141 parentName = "<unnamed>"; 4142 } 4143 ss.print(", child of \"%s\" %s", parentName, pl->klass()->external_name()); 4144 } else { 4145 ss.print(", child of <bootstrap>"); 4146 } 4147 } 4148 ss.print(")"); 4149 4150 return ss.as_string(); 4151 } 4152 4153 // Support for java_lang_System 4154 // 4155 #define SYSTEM_FIELDS_DO(macro) \ 4156 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4157 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4158 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4159 macro(static_security_offset, k, "security", security_manager_signature, true) 4160 4161 void java_lang_System::compute_offsets() { 4162 InstanceKlass* k = SystemDictionary::System_klass(); 4163 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4164 } 4165 4166 #if INCLUDE_CDS 4167 void java_lang_System::serialize(SerializeClosure* f) { 4168 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4169 } 4170 #endif 4171 4172 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4173 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4174 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4175 4176 4177 bool java_lang_System::has_security_manager() { 4178 InstanceKlass* ik = SystemDictionary::System_klass(); 4179 oop base = ik->static_field_base_raw(); 4180 return base->obj_field(static_security_offset) != NULL; 4181 } 4182 4183 int java_lang_Class::_klass_offset; 4184 int java_lang_Class::_array_klass_offset; 4185 int java_lang_Class::_oop_size_offset; 4186 int java_lang_Class::_static_oop_field_count_offset; 4187 int java_lang_Class::_class_loader_offset; 4188 int java_lang_Class::_module_offset; 4189 int java_lang_Class::_protection_domain_offset; 4190 int java_lang_Class::_component_mirror_offset; 4191 int java_lang_Class::_init_lock_offset; 4192 int java_lang_Class::_signers_offset; 4193 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4194 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4195 int java_lang_Throwable::backtrace_offset; 4196 int java_lang_Throwable::detailMessage_offset; 4197 int java_lang_Throwable::stackTrace_offset; 4198 int java_lang_Throwable::depth_offset; 4199 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4200 int java_lang_reflect_AccessibleObject::override_offset; 4201 int java_lang_reflect_Method::clazz_offset; 4202 int java_lang_reflect_Method::name_offset; 4203 int java_lang_reflect_Method::returnType_offset; 4204 int java_lang_reflect_Method::parameterTypes_offset; 4205 int java_lang_reflect_Method::exceptionTypes_offset; 4206 int java_lang_reflect_Method::slot_offset; 4207 int java_lang_reflect_Method::modifiers_offset; 4208 int java_lang_reflect_Method::signature_offset; 4209 int java_lang_reflect_Method::annotations_offset; 4210 int java_lang_reflect_Method::parameter_annotations_offset; 4211 int java_lang_reflect_Method::annotation_default_offset; 4212 int java_lang_reflect_Method::type_annotations_offset; 4213 int java_lang_reflect_Constructor::clazz_offset; 4214 int java_lang_reflect_Constructor::parameterTypes_offset; 4215 int java_lang_reflect_Constructor::exceptionTypes_offset; 4216 int java_lang_reflect_Constructor::slot_offset; 4217 int java_lang_reflect_Constructor::modifiers_offset; 4218 int java_lang_reflect_Constructor::signature_offset; 4219 int java_lang_reflect_Constructor::annotations_offset; 4220 int java_lang_reflect_Constructor::parameter_annotations_offset; 4221 int java_lang_reflect_Constructor::type_annotations_offset; 4222 int java_lang_reflect_Field::clazz_offset; 4223 int java_lang_reflect_Field::name_offset; 4224 int java_lang_reflect_Field::type_offset; 4225 int java_lang_reflect_Field::slot_offset; 4226 int java_lang_reflect_Field::modifiers_offset; 4227 int java_lang_reflect_Field::signature_offset; 4228 int java_lang_reflect_Field::annotations_offset; 4229 int java_lang_reflect_Field::type_annotations_offset; 4230 int java_lang_reflect_Parameter::name_offset; 4231 int java_lang_reflect_Parameter::modifiers_offset; 4232 int java_lang_reflect_Parameter::index_offset; 4233 int java_lang_reflect_Parameter::executable_offset; 4234 int java_lang_boxing_object::value_offset; 4235 int java_lang_boxing_object::long_value_offset; 4236 int java_lang_ref_Reference::referent_offset; 4237 int java_lang_ref_Reference::queue_offset; 4238 int java_lang_ref_Reference::next_offset; 4239 int java_lang_ref_Reference::discovered_offset; 4240 int java_lang_ref_SoftReference::timestamp_offset; 4241 int java_lang_ref_SoftReference::static_clock_offset; 4242 int java_lang_Continuation::scope_offset; 4243 int java_lang_Continuation::target_offset; 4244 int java_lang_Continuation::stack_offset; 4245 int java_lang_Continuation::maxSize_offset; 4246 int java_lang_Continuation::numFrames_offset; 4247 int java_lang_Continuation::numInterpretedFrames_offset; 4248 int java_lang_Continuation::refStack_offset; 4249 int java_lang_Continuation::parent_offset; 4250 int java_lang_Continuation::entrySP_offset; 4251 int java_lang_Continuation::entryFP_offset; 4252 int java_lang_Continuation::entryPC_offset; 4253 int java_lang_Continuation::fp_offset; 4254 int java_lang_Continuation::sp_offset; 4255 int java_lang_Continuation::pc_offset; 4256 int java_lang_Continuation::refSP_offset; 4257 int java_lang_Continuation::flags_offset; 4258 int java_lang_ClassLoader::parent_offset; 4259 int java_lang_System::static_in_offset; 4260 int java_lang_System::static_out_offset; 4261 int java_lang_System::static_err_offset; 4262 int java_lang_System::static_security_offset; 4263 int java_lang_StackTraceElement::methodName_offset; 4264 int java_lang_StackTraceElement::fileName_offset; 4265 int java_lang_StackTraceElement::lineNumber_offset; 4266 int java_lang_StackTraceElement::moduleName_offset; 4267 int java_lang_StackTraceElement::moduleVersion_offset; 4268 int java_lang_StackTraceElement::classLoaderName_offset; 4269 int java_lang_StackTraceElement::declaringClass_offset; 4270 int java_lang_StackTraceElement::declaringClassObject_offset; 4271 int java_lang_StackFrameInfo::_memberName_offset; 4272 int java_lang_StackFrameInfo::_bci_offset; 4273 int java_lang_StackFrameInfo::_version_offset; 4274 int java_lang_LiveStackFrameInfo::_monitors_offset; 4275 int java_lang_LiveStackFrameInfo::_locals_offset; 4276 int java_lang_LiveStackFrameInfo::_operands_offset; 4277 int java_lang_LiveStackFrameInfo::_mode_offset; 4278 int java_lang_AssertionStatusDirectives::classes_offset; 4279 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4280 int java_lang_AssertionStatusDirectives::packages_offset; 4281 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4282 int java_lang_AssertionStatusDirectives::deflt_offset; 4283 int java_nio_Buffer::_limit_offset; 4284 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 4285 int reflect_ConstantPool::_oop_offset; 4286 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4287 4288 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4289 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4290 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4291 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4292 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4293 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4294 macro(methodName_offset, k, "methodName", string_signature, false); \ 4295 macro(fileName_offset, k, "fileName", string_signature, false); \ 4296 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4297 4298 // Support for java_lang_StackTraceElement 4299 void java_lang_StackTraceElement::compute_offsets() { 4300 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4301 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4302 } 4303 4304 #if INCLUDE_CDS 4305 void java_lang_StackTraceElement::serialize(SerializeClosure* f) { 4306 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4307 } 4308 #endif 4309 4310 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4311 element->obj_field_put(fileName_offset, value); 4312 } 4313 4314 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4315 element->obj_field_put(declaringClass_offset, value); 4316 } 4317 4318 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4319 element->obj_field_put(methodName_offset, value); 4320 } 4321 4322 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4323 element->int_field_put(lineNumber_offset, value); 4324 } 4325 4326 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4327 element->obj_field_put(moduleName_offset, value); 4328 } 4329 4330 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4331 element->obj_field_put(moduleVersion_offset, value); 4332 } 4333 4334 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4335 element->obj_field_put(classLoaderName_offset, value); 4336 } 4337 4338 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4339 element->obj_field_put(declaringClassObject_offset, value); 4340 } 4341 4342 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4343 element->short_field_put(_version_offset, value); 4344 } 4345 4346 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4347 element->int_field_put(_bci_offset, value); 4348 } 4349 4350 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4351 element->obj_field_put(_monitors_offset, value); 4352 } 4353 4354 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4355 element->obj_field_put(_locals_offset, value); 4356 } 4357 4358 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4359 element->obj_field_put(_operands_offset, value); 4360 } 4361 4362 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4363 element->int_field_put(_mode_offset, value); 4364 } 4365 4366 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4367 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4368 macro(classes_offset, k, "classes", string_array_signature, false); \ 4369 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4370 macro(packages_offset, k, "packages", string_array_signature, false); \ 4371 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4372 macro(deflt_offset, k, "deflt", bool_signature, false) 4373 4374 void java_lang_AssertionStatusDirectives::compute_offsets() { 4375 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4376 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4377 } 4378 4379 #if INCLUDE_CDS 4380 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) { 4381 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4382 } 4383 #endif 4384 4385 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4386 o->obj_field_put(classes_offset, val); 4387 } 4388 4389 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4390 o->obj_field_put(classEnabled_offset, val); 4391 } 4392 4393 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4394 o->obj_field_put(packages_offset, val); 4395 } 4396 4397 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4398 o->obj_field_put(packageEnabled_offset, val); 4399 } 4400 4401 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4402 o->bool_field_put(deflt_offset, val); 4403 } 4404 4405 // Support for java.lang.Continuation 4406 4407 void java_lang_Continuation::compute_offsets() { 4408 InstanceKlass* k = SystemDictionary::Continuation_klass(); 4409 compute_offset(scope_offset, k, vmSymbols::scope_name(), vmSymbols::continuationscope_signature()); 4410 compute_offset(target_offset, k, vmSymbols::target_name(), vmSymbols::runnable_signature()); 4411 compute_offset(parent_offset, k, vmSymbols::parent_name(), vmSymbols::continuation_signature()); 4412 compute_offset(stack_offset, k, vmSymbols::stack_name(), vmSymbols::int_array_signature()); 4413 compute_offset(maxSize_offset, k, vmSymbols::maxSize_name(), vmSymbols::int_signature()); 4414 compute_offset(refStack_offset, k, vmSymbols::refStack_name(), vmSymbols::object_array_signature()); 4415 compute_offset(entrySP_offset, k, vmSymbols::entrySP_name(), vmSymbols::long_signature()); 4416 compute_offset(entryFP_offset, k, vmSymbols::entryFP_name(), vmSymbols::long_signature()); 4417 compute_offset(entryPC_offset, k, vmSymbols::entryPC_name(), vmSymbols::long_signature()); 4418 compute_offset(fp_offset, k, vmSymbols::fp_name(), vmSymbols::long_signature()); 4419 compute_offset(sp_offset, k, vmSymbols::sp_name(), vmSymbols::int_signature()); 4420 compute_offset(pc_offset, k, vmSymbols::pc_name(), vmSymbols::long_signature()); 4421 compute_offset(refSP_offset, k, vmSymbols::refSP_name(), vmSymbols::int_signature()); 4422 compute_offset(flags_offset, k, vmSymbols::flags_name(), vmSymbols::byte_signature()); 4423 compute_offset(numFrames_offset, k, vmSymbols::numFrames_name(), vmSymbols::short_signature()); 4424 compute_offset(numInterpretedFrames_offset, k, vmSymbols::numInterpretedFrames_name(), vmSymbols::short_signature()); 4425 } 4426 4427 bool java_lang_Continuation::on_local_stack(oop ref, address adr) { 4428 arrayOop s = stack(ref); 4429 void* base = s->base(T_INT); 4430 return adr >= base && (char*)adr < ((char*)base + (s->length() * 4)); 4431 } 4432 4433 4434 // Support for intrinsification of java.nio.Buffer.checkIndex 4435 int java_nio_Buffer::limit_offset() { 4436 return _limit_offset; 4437 } 4438 4439 #define BUFFER_FIELDS_DO(macro) \ 4440 macro(_limit_offset, k, "limit", int_signature, false) 4441 4442 void java_nio_Buffer::compute_offsets() { 4443 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4444 assert(k != NULL, "must be loaded in 1.4+"); 4445 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4446 } 4447 4448 #if INCLUDE_CDS 4449 void java_nio_Buffer::serialize(SerializeClosure* f) { 4450 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4451 } 4452 #endif 4453 4454 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 4455 if (_owner_offset != 0) return; 4456 4457 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 4458 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 4459 compute_offset(_owner_offset, k, 4460 "exclusiveOwnerThread", vmSymbols::thread_signature()); 4461 } 4462 4463 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4464 assert(_owner_offset != 0, "Must be initialized"); 4465 return obj->obj_field(_owner_offset); 4466 } 4467 4468 static int member_offset(int hardcoded_offset) { 4469 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4470 } 4471 4472 // Compute hard-coded offsets 4473 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4474 // are not available to determine the offset_of_static_fields. 4475 void JavaClasses::compute_hard_coded_offsets() { 4476 4477 // java_lang_boxing_object 4478 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4479 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4480 4481 // java_lang_ref_Reference 4482 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4483 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4484 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4485 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4486 4487 // // java_lang_Continuation Class 4488 // java_lang_Continuation::target_offset = member_offset(java_lang_Continuation::hc_target_offset); 4489 // java_lang_Continuation::parent_offset = member_offset(java_lang_Continuation::hc_parent_offset); 4490 // java_lang_Continuation::entrySP_offset = member_offset(java_lang_Continuation::hc_entrySP_offset); 4491 // java_lang_Continuation::entryFP_offset = member_offset(java_lang_Continuation::hc_entryFP_offset); 4492 // java_lang_Continuation::entryPC_offset = member_offset(java_lang_Continuation::hc_entryPC_offset); 4493 // java_lang_Continuation::stack_offset = member_offset(java_lang_Continuation::hc_stack_offset); 4494 // java_lang_Continuation::lastFP_offset = member_offset(java_lang_Continuation::hc_lastFP_offset); 4495 // java_lang_Continuation::lastSP_offset = member_offset(java_lang_Continuation::hc_lastSP_offset); 4496 } 4497 4498 4499 // Compute non-hard-coded field offsets of all the classes in this file 4500 void JavaClasses::compute_offsets() { 4501 if (UseSharedSpaces) { 4502 return; // field offsets are loaded from archive 4503 } 4504 4505 // java_lang_Class::compute_offsets was called earlier in bootstrap 4506 java_lang_System::compute_offsets(); 4507 java_lang_ClassLoader::compute_offsets(); 4508 java_lang_Throwable::compute_offsets(); 4509 java_lang_Thread::compute_offsets(); 4510 java_lang_ThreadGroup::compute_offsets(); 4511 java_lang_AssertionStatusDirectives::compute_offsets(); 4512 java_lang_ref_SoftReference::compute_offsets(); 4513 java_lang_invoke_MethodHandle::compute_offsets(); 4514 java_lang_invoke_DirectMethodHandle::compute_offsets(); 4515 java_lang_invoke_MemberName::compute_offsets(); 4516 java_lang_invoke_ResolvedMethodName::compute_offsets(); 4517 java_lang_invoke_LambdaForm::compute_offsets(); 4518 java_lang_invoke_MethodType::compute_offsets(); 4519 java_lang_invoke_CallSite::compute_offsets(); 4520 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 4521 java_security_AccessControlContext::compute_offsets(); 4522 // Initialize reflection classes. The layouts of these classes 4523 // changed with the new reflection implementation in JDK 1.4, and 4524 // since the Universe doesn't know what JDK version it is until this 4525 // point we defer computation of these offsets until now. 4526 java_lang_reflect_AccessibleObject::compute_offsets(); 4527 java_lang_reflect_Method::compute_offsets(); 4528 java_lang_reflect_Constructor::compute_offsets(); 4529 java_lang_reflect_Field::compute_offsets(); 4530 java_nio_Buffer::compute_offsets(); 4531 reflect_ConstantPool::compute_offsets(); 4532 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 4533 java_lang_reflect_Parameter::compute_offsets(); 4534 java_lang_Module::compute_offsets(); 4535 java_lang_StackTraceElement::compute_offsets(); 4536 java_lang_StackFrameInfo::compute_offsets(); 4537 java_lang_LiveStackFrameInfo::compute_offsets(); 4538 java_lang_Continuation::compute_offsets(); 4539 4540 // generated interpreter code wants to know about the offsets we just computed: 4541 AbstractAssembler::update_delayed_values(); 4542 } 4543 4544 #ifndef PRODUCT 4545 4546 // These functions exist to assert the validity of hard-coded field offsets to guard 4547 // against changes in the class files 4548 4549 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4550 EXCEPTION_MARK; 4551 fieldDescriptor fd; 4552 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4553 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4554 InstanceKlass* ik = InstanceKlass::cast(k); 4555 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4556 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4557 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4558 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4559 return false; 4560 } 4561 if (fd.is_static()) { 4562 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4563 return false; 4564 } 4565 if (fd.offset() == hardcoded_offset ) { 4566 return true; 4567 } else { 4568 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4569 klass_name, field_name, hardcoded_offset, fd.offset()); 4570 return false; 4571 } 4572 } 4573 4574 // Check the hard-coded field offsets of all the classes in this file 4575 4576 void JavaClasses::check_offsets() { 4577 bool valid = true; 4578 4579 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4580 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4581 4582 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4583 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4584 4585 // Boxed primitive objects (java_lang_boxing_object) 4586 4587 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4588 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4589 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4590 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4591 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4592 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4593 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4594 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4595 4596 // java.lang.ref.Reference 4597 4598 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4599 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4600 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4601 // Fake field 4602 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4603 4604 // java.lang.Continuation 4605 4606 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, target, "Ljava/lang/Runnable;"); 4607 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, stack, "[I"); 4608 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, parent, "Ljava/lang/Continuation;"); 4609 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, entrySP, "J"); 4610 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, entryFP, "J"); 4611 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, entryPC, "J"); 4612 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, lastFP, "I"); 4613 // CHECK_OFFSET("java/lang/Continuation", java_lang_Continuation, lastSP, "I"); 4614 4615 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4616 } 4617 4618 #endif // PRODUCT 4619 4620 int InjectedField::compute_offset() { 4621 InstanceKlass* ik = InstanceKlass::cast(klass()); 4622 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4623 if (!may_be_java && !fs.access_flags().is_internal()) { 4624 // Only look at injected fields 4625 continue; 4626 } 4627 if (fs.name() == name() && fs.signature() == signature()) { 4628 return fs.offset(); 4629 } 4630 } 4631 ResourceMark rm; 4632 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)" : ""); 4633 #ifndef PRODUCT 4634 ik->print(); 4635 tty->print_cr("all fields:"); 4636 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4637 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4638 } 4639 #endif //PRODUCT 4640 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4641 return -1; 4642 } 4643 4644 void javaClasses_init() { 4645 JavaClasses::compute_offsets(); 4646 JavaClasses::check_offsets(); 4647 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4648 }