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