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.inline.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_offsets(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 assert(archived_m != NULL, "sanity"); 1042 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1043 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1044 if (ak != NULL) { 1045 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1046 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1047 } 1048 1049 // Clear the fields. Just to be safe 1050 Klass *k = m->klass(); 1051 Handle archived_mirror_h(THREAD, archived_m); 1052 ResetMirrorField reset(archived_mirror_h); 1053 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1054 1055 log_trace(cds, heap, mirror)( 1056 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1057 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1058 1059 Universe::_mirrors[t] = archived_m; 1060 } 1061 } 1062 1063 assert(Universe::_mirrors[T_INT] != NULL && 1064 Universe::_mirrors[T_FLOAT] != NULL && 1065 Universe::_mirrors[T_DOUBLE] != NULL && 1066 Universe::_mirrors[T_BYTE] != NULL && 1067 Universe::_mirrors[T_BOOLEAN] != NULL && 1068 Universe::_mirrors[T_CHAR] != NULL && 1069 Universe::_mirrors[T_LONG] != NULL && 1070 Universe::_mirrors[T_SHORT] != NULL && 1071 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1072 1073 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1074 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1075 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1076 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1077 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1078 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1079 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1080 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1081 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1082 } 1083 1084 // 1085 // After the mirror object is successfully archived, the archived 1086 // klass is set with _has_archived_raw_mirror flag. 1087 // 1088 // The _has_archived_raw_mirror flag is cleared at runtime when the 1089 // archived mirror is restored. If archived java heap data cannot 1090 // be used at runtime, new mirror object is created for the shared 1091 // class. The _has_archived_raw_mirror is cleared also during the process. 1092 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1093 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1094 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1095 1096 // Mirror is already archived 1097 if (k->has_raw_archived_mirror()) { 1098 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1099 return k->archived_java_mirror_raw(); 1100 } 1101 1102 // No mirror 1103 oop mirror = k->java_mirror(); 1104 if (mirror == NULL) { 1105 return NULL; 1106 } 1107 1108 if (k->is_instance_klass()) { 1109 InstanceKlass *ik = InstanceKlass::cast(k); 1110 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1111 "class with signer cannot be supported"); 1112 1113 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1114 ik->is_shared_app_class())) { 1115 // Archiving mirror for classes from non-builtin loaders is not 1116 // supported. Clear the _java_mirror within the archived class. 1117 k->set_java_mirror_handle(NULL); 1118 return NULL; 1119 } 1120 } 1121 1122 // Now start archiving the mirror object 1123 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD); 1124 if (archived_mirror == NULL) { 1125 return NULL; 1126 } 1127 1128 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1129 if (archived_mirror == NULL) { 1130 return NULL; 1131 } 1132 1133 k->set_archived_java_mirror_raw(archived_mirror); 1134 1135 k->set_has_raw_archived_mirror(); 1136 1137 ResourceMark rm; 1138 log_trace(cds, heap, mirror)( 1139 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1140 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1141 1142 return archived_mirror; 1143 } 1144 1145 // The process is based on create_mirror(). 1146 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1147 oop archived_mirror, 1148 Thread *THREAD) { 1149 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1150 // to archived metadata and objects below. 1151 Klass *c = archived_mirror->klass(); 1152 Handle archived_mirror_h(THREAD, archived_mirror); 1153 ResetMirrorField reset(archived_mirror_h); 1154 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1155 1156 if (k->is_array_klass()) { 1157 oop archived_comp_mirror; 1158 if (k->is_typeArray_klass()) { 1159 // The primitive type mirrors are already archived. Get the archived mirror. 1160 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1161 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror); 1162 assert(archived_comp_mirror != NULL, "Must be"); 1163 } else { 1164 assert(k->is_objArray_klass(), "Must be"); 1165 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1166 assert(element_klass != NULL, "Must have an element klass"); 1167 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1168 if (archived_comp_mirror == NULL) { 1169 return NULL; 1170 } 1171 } 1172 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1173 } else { 1174 assert(k->is_instance_klass(), "Must be"); 1175 1176 // Reset local static fields in the mirror 1177 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1178 1179 java_lang_Class:set_init_lock(archived_mirror, NULL); 1180 1181 set_protection_domain(archived_mirror, NULL); 1182 } 1183 1184 // clear class loader and mirror_module_field 1185 set_class_loader(archived_mirror, NULL); 1186 set_module(archived_mirror, NULL); 1187 1188 // The archived mirror's field at _klass_offset is still pointing to the original 1189 // klass. Updated the field in the archived mirror to point to the relocated 1190 // klass in the archive. 1191 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1192 log_debug(cds, heap, mirror)( 1193 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1194 p2i(as_Klass(mirror)), p2i(reloc_k)); 1195 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1196 1197 // The field at _array_klass_offset is pointing to the original one dimension 1198 // higher array klass if exists. Relocate the pointer. 1199 Klass *arr = array_klass_acquire(mirror); 1200 if (arr != NULL) { 1201 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1202 log_debug(cds, heap, mirror)( 1203 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1204 p2i(arr), p2i(reloc_arr)); 1205 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1206 } 1207 return archived_mirror; 1208 } 1209 1210 // Returns true if the mirror is updated, false if no archived mirror 1211 // data is present. After the archived mirror object is restored, the 1212 // shared klass' _has_raw_archived_mirror flag is cleared. 1213 bool java_lang_Class::restore_archived_mirror(Klass *k, 1214 Handle class_loader, Handle module, 1215 Handle protection_domain, TRAPS) { 1216 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw()); 1217 1218 if (m == NULL) { 1219 return false; 1220 } 1221 1222 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1223 1224 // mirror is archived, restore 1225 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object"); 1226 Handle mirror(THREAD, m); 1227 1228 // The java.lang.Class field offsets were archived and reloaded from archive. 1229 // No need to put classes on the fixup_mirror_list before java.lang.Class 1230 // is loaded. 1231 1232 if (!k->is_array_klass()) { 1233 // - local static final fields with initial values were initialized at dump time 1234 1235 // create the init_lock 1236 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1237 set_init_lock(mirror(), r); 1238 1239 if (protection_domain.not_null()) { 1240 set_protection_domain(mirror(), protection_domain()); 1241 } 1242 } 1243 1244 assert(class_loader() == k->class_loader(), "should be same"); 1245 if (class_loader.not_null()) { 1246 set_class_loader(mirror(), class_loader()); 1247 } 1248 1249 k->set_java_mirror(mirror); 1250 k->clear_has_raw_archived_mirror(); 1251 1252 set_mirror_module_field(k, mirror, module, THREAD); 1253 1254 ResourceMark rm; 1255 log_trace(cds, heap, mirror)( 1256 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1257 1258 return true; 1259 } 1260 #endif // INCLUDE_CDS_JAVA_HEAP 1261 1262 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1263 assert(_module_offset != 0, "must have been computed already"); 1264 java_lang_Class::set_module(k->java_mirror(), module()); 1265 } 1266 1267 int java_lang_Class::oop_size(oop java_class) { 1268 assert(_oop_size_offset != 0, "must be set"); 1269 int size = java_class->int_field(_oop_size_offset); 1270 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1271 return size; 1272 } 1273 1274 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1275 assert(_oop_size_offset != 0, "must be set"); 1276 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1277 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1278 } 1279 1280 int java_lang_Class::static_oop_field_count(oop java_class) { 1281 assert(_static_oop_field_count_offset != 0, "must be set"); 1282 return java_class->int_field(_static_oop_field_count_offset); 1283 } 1284 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1285 assert(_static_oop_field_count_offset != 0, "must be set"); 1286 java_class->int_field_put(_static_oop_field_count_offset, size); 1287 } 1288 1289 oop java_lang_Class::protection_domain(oop java_class) { 1290 assert(_protection_domain_offset != 0, "must be set"); 1291 return java_class->obj_field(_protection_domain_offset); 1292 } 1293 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1294 assert(_protection_domain_offset != 0, "must be set"); 1295 java_class->obj_field_put(_protection_domain_offset, pd); 1296 } 1297 1298 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1299 assert(_component_mirror_offset != 0, "must be set"); 1300 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1301 } 1302 oop java_lang_Class::component_mirror(oop java_class) { 1303 assert(_component_mirror_offset != 0, "must be set"); 1304 return java_class->obj_field(_component_mirror_offset); 1305 } 1306 1307 oop java_lang_Class::init_lock(oop java_class) { 1308 assert(_init_lock_offset != 0, "must be set"); 1309 return java_class->obj_field(_init_lock_offset); 1310 } 1311 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1312 assert(_init_lock_offset != 0, "must be set"); 1313 java_class->obj_field_put(_init_lock_offset, init_lock); 1314 } 1315 1316 objArrayOop java_lang_Class::signers(oop java_class) { 1317 assert(_signers_offset != 0, "must be set"); 1318 return (objArrayOop)java_class->obj_field(_signers_offset); 1319 } 1320 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1321 assert(_signers_offset != 0, "must be set"); 1322 java_class->obj_field_put(_signers_offset, (oop)signers); 1323 } 1324 1325 1326 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1327 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1328 if (_class_loader_offset != 0) { 1329 java_class->obj_field_put(_class_loader_offset, loader); 1330 } 1331 } 1332 1333 oop java_lang_Class::class_loader(oop java_class) { 1334 assert(_class_loader_offset != 0, "must be set"); 1335 return java_class->obj_field(_class_loader_offset); 1336 } 1337 1338 oop java_lang_Class::module(oop java_class) { 1339 assert(_module_offset != 0, "must be set"); 1340 return java_class->obj_field(_module_offset); 1341 } 1342 1343 void java_lang_Class::set_module(oop java_class, oop module) { 1344 assert(_module_offset != 0, "must be set"); 1345 java_class->obj_field_put(_module_offset, module); 1346 } 1347 1348 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1349 // This should be improved by adding a field at the Java level or by 1350 // introducing a new VM klass (see comment in ClassFileParser) 1351 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1352 if (type != T_VOID) { 1353 Klass* aklass = Universe::typeArrayKlassObj(type); 1354 assert(aklass != NULL, "correct bootstrap"); 1355 release_set_array_klass(java_class, aklass); 1356 } 1357 #ifdef ASSERT 1358 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1359 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1360 #endif 1361 return java_class; 1362 } 1363 1364 1365 Klass* java_lang_Class::as_Klass(oop java_class) { 1366 //%note memory_2 1367 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1368 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1369 assert(k == NULL || k->is_klass(), "type check"); 1370 return k; 1371 } 1372 1373 1374 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1375 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1376 java_class->metadata_field_put(_klass_offset, klass); 1377 } 1378 1379 1380 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1382 Symbol* name = NULL; 1383 bool is_instance = false; 1384 if (is_primitive(java_class)) { 1385 name = vmSymbols::type_signature(primitive_type(java_class)); 1386 } else { 1387 Klass* k = as_Klass(java_class); 1388 is_instance = k->is_instance_klass(); 1389 name = k->name(); 1390 } 1391 if (name == NULL) { 1392 st->print("<null>"); 1393 return; 1394 } 1395 if (is_instance) st->print("L"); 1396 st->write((char*) name->base(), (int) name->utf8_length()); 1397 if (is_instance) st->print(";"); 1398 } 1399 1400 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1401 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1402 Symbol* name; 1403 if (is_primitive(java_class)) { 1404 name = vmSymbols::type_signature(primitive_type(java_class)); 1405 // Because this can create a new symbol, the caller has to decrement 1406 // the refcount, so make adjustment here and below for symbols returned 1407 // that are not created or incremented due to a successful lookup. 1408 name->increment_refcount(); 1409 } else { 1410 Klass* k = as_Klass(java_class); 1411 if (!k->is_instance_klass()) { 1412 name = k->name(); 1413 name->increment_refcount(); 1414 } else { 1415 ResourceMark rm; 1416 const char* sigstr = k->signature_name(); 1417 int siglen = (int) strlen(sigstr); 1418 if (!intern_if_not_found) { 1419 name = SymbolTable::probe(sigstr, siglen); 1420 } else { 1421 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1422 } 1423 } 1424 } 1425 return name; 1426 } 1427 1428 // Returns the Java name for this Java mirror (Resource allocated) 1429 // See Klass::external_name(). 1430 // For primitive type Java mirrors, its type name is returned. 1431 const char* java_lang_Class::as_external_name(oop java_class) { 1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1433 const char* name = NULL; 1434 if (is_primitive(java_class)) { 1435 name = type2name(primitive_type(java_class)); 1436 } else { 1437 name = as_Klass(java_class)->external_name(); 1438 } 1439 if (name == NULL) { 1440 name = "<null>"; 1441 } 1442 return name; 1443 } 1444 1445 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1446 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1447 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1448 return k; 1449 } 1450 1451 1452 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1453 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1454 java_class->release_metadata_field_put(_array_klass_offset, klass); 1455 } 1456 1457 1458 bool java_lang_Class::is_primitive(oop java_class) { 1459 // should assert: 1460 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1461 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1462 1463 #ifdef ASSERT 1464 if (is_primitive) { 1465 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1466 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1467 "Should be either the T_VOID primitive or a java primitive"); 1468 } 1469 #endif 1470 1471 return is_primitive; 1472 } 1473 1474 1475 BasicType java_lang_Class::primitive_type(oop java_class) { 1476 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1477 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1478 BasicType type = T_VOID; 1479 if (ak != NULL) { 1480 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1481 type = ArrayKlass::cast(ak)->element_type(); 1482 } else { 1483 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1484 } 1485 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1486 return type; 1487 } 1488 1489 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1490 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1491 if (is_primitive(java_class)) { 1492 if (reference_klass != NULL) 1493 (*reference_klass) = NULL; 1494 return primitive_type(java_class); 1495 } else { 1496 if (reference_klass != NULL) 1497 (*reference_klass) = as_Klass(java_class); 1498 return T_OBJECT; 1499 } 1500 } 1501 1502 1503 oop java_lang_Class::primitive_mirror(BasicType t) { 1504 oop mirror = Universe::java_mirror(t); 1505 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1506 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1507 return mirror; 1508 } 1509 1510 bool java_lang_Class::offsets_computed = false; 1511 int java_lang_Class::classRedefinedCount_offset = -1; 1512 1513 #define CLASS_FIELDS_DO(macro) \ 1514 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1515 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1516 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1517 macro(_module_offset, k, "module", module_signature, false) 1518 1519 void java_lang_Class::compute_offsets() { 1520 if (offsets_computed) { 1521 return; 1522 } 1523 1524 offsets_computed = true; 1525 1526 InstanceKlass* k = SystemDictionary::Class_klass(); 1527 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1528 1529 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1530 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1531 // GC treats them the same. 1532 _init_lock_offset = _component_mirror_offset; 1533 1534 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1535 } 1536 1537 #if INCLUDE_CDS 1538 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1539 f->do_u4((u4*)&offsets_computed); 1540 f->do_u4((u4*)&_init_lock_offset); 1541 1542 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1543 1544 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1545 } 1546 #endif 1547 1548 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1549 if (classRedefinedCount_offset == -1) { 1550 // If we don't have an offset for it then just return -1 as a marker. 1551 return -1; 1552 } 1553 1554 return the_class_mirror->int_field(classRedefinedCount_offset); 1555 } 1556 1557 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1558 if (classRedefinedCount_offset == -1) { 1559 // If we don't have an offset for it then nothing to set. 1560 return; 1561 } 1562 1563 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1564 } 1565 1566 1567 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1568 // platform thread structure, and a eetop offset which was used for thread 1569 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1570 // merged, so in the HotSpot VM we just use the eetop field for the thread 1571 // instead of the privateInfo_offset. 1572 // 1573 // Note: The stackSize field is only present starting in 1.4. 1574 1575 int java_lang_Thread::_name_offset = 0; 1576 int java_lang_Thread::_group_offset = 0; 1577 int java_lang_Thread::_contextClassLoader_offset = 0; 1578 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1579 int java_lang_Thread::_priority_offset = 0; 1580 int java_lang_Thread::_eetop_offset = 0; 1581 int java_lang_Thread::_daemon_offset = 0; 1582 int java_lang_Thread::_stillborn_offset = 0; 1583 int java_lang_Thread::_stackSize_offset = 0; 1584 int java_lang_Thread::_tid_offset = 0; 1585 int java_lang_Thread::_thread_status_offset = 0; 1586 int java_lang_Thread::_park_blocker_offset = 0; 1587 int java_lang_Thread::_park_event_offset = 0 ; 1588 1589 #define THREAD_FIELDS_DO(macro) \ 1590 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1591 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1592 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1593 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1594 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1595 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1596 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1597 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1598 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1599 macro(_tid_offset, k, "tid", long_signature, false); \ 1600 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1601 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1602 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1603 1604 void java_lang_Thread::compute_offsets() { 1605 assert(_group_offset == 0, "offsets should be initialized only once"); 1606 1607 InstanceKlass* k = SystemDictionary::Thread_klass(); 1608 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1609 } 1610 1611 #if INCLUDE_CDS 1612 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1613 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1614 } 1615 #endif 1616 1617 JavaThread* java_lang_Thread::thread(oop java_thread) { 1618 return (JavaThread*)java_thread->address_field(_eetop_offset); 1619 } 1620 1621 1622 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1623 java_thread->address_field_put(_eetop_offset, (address)thread); 1624 } 1625 1626 1627 oop java_lang_Thread::name(oop java_thread) { 1628 return java_thread->obj_field(_name_offset); 1629 } 1630 1631 1632 void java_lang_Thread::set_name(oop java_thread, oop name) { 1633 java_thread->obj_field_put(_name_offset, name); 1634 } 1635 1636 1637 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1638 return (ThreadPriority)java_thread->int_field(_priority_offset); 1639 } 1640 1641 1642 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1643 java_thread->int_field_put(_priority_offset, priority); 1644 } 1645 1646 1647 oop java_lang_Thread::threadGroup(oop java_thread) { 1648 return java_thread->obj_field(_group_offset); 1649 } 1650 1651 1652 bool java_lang_Thread::is_stillborn(oop java_thread) { 1653 return java_thread->bool_field(_stillborn_offset) != 0; 1654 } 1655 1656 1657 // We never have reason to turn the stillborn bit off 1658 void java_lang_Thread::set_stillborn(oop java_thread) { 1659 java_thread->bool_field_put(_stillborn_offset, true); 1660 } 1661 1662 1663 bool java_lang_Thread::is_alive(oop java_thread) { 1664 JavaThread* thr = java_lang_Thread::thread(java_thread); 1665 return (thr != NULL); 1666 } 1667 1668 1669 bool java_lang_Thread::is_daemon(oop java_thread) { 1670 return java_thread->bool_field(_daemon_offset) != 0; 1671 } 1672 1673 1674 void java_lang_Thread::set_daemon(oop java_thread) { 1675 java_thread->bool_field_put(_daemon_offset, true); 1676 } 1677 1678 oop java_lang_Thread::context_class_loader(oop java_thread) { 1679 return java_thread->obj_field(_contextClassLoader_offset); 1680 } 1681 1682 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1683 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1684 } 1685 1686 1687 jlong java_lang_Thread::stackSize(oop java_thread) { 1688 if (_stackSize_offset > 0) { 1689 return java_thread->long_field(_stackSize_offset); 1690 } else { 1691 return 0; 1692 } 1693 } 1694 1695 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1696 void java_lang_Thread::set_thread_status(oop java_thread, 1697 java_lang_Thread::ThreadStatus status) { 1698 // The threadStatus is only present starting in 1.5 1699 if (_thread_status_offset > 0) { 1700 java_thread->int_field_put(_thread_status_offset, status); 1701 } 1702 } 1703 1704 // Read thread status value from threadStatus field in java.lang.Thread java class. 1705 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1706 // Make sure the caller is operating on behalf of the VM or is 1707 // running VM code (state == _thread_in_vm). 1708 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1709 JavaThread::current()->thread_state() == _thread_in_vm, 1710 "Java Thread is not running in vm"); 1711 // The threadStatus is only present starting in 1.5 1712 if (_thread_status_offset > 0) { 1713 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1714 } else { 1715 // All we can easily figure out is if it is alive, but that is 1716 // enough info for a valid unknown status. 1717 // These aren't restricted to valid set ThreadStatus values, so 1718 // use JVMTI values and cast. 1719 JavaThread* thr = java_lang_Thread::thread(java_thread); 1720 if (thr == NULL) { 1721 // the thread hasn't run yet or is in the process of exiting 1722 return NEW; 1723 } 1724 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1725 } 1726 } 1727 1728 1729 jlong java_lang_Thread::thread_id(oop java_thread) { 1730 // The thread ID field is only present starting in 1.5 1731 if (_tid_offset > 0) { 1732 return java_thread->long_field(_tid_offset); 1733 } else { 1734 return 0; 1735 } 1736 } 1737 1738 oop java_lang_Thread::park_blocker(oop java_thread) { 1739 assert(JDK_Version::current().supports_thread_park_blocker() && 1740 _park_blocker_offset != 0, "Must support parkBlocker field"); 1741 1742 if (_park_blocker_offset > 0) { 1743 return java_thread->obj_field(_park_blocker_offset); 1744 } 1745 1746 return NULL; 1747 } 1748 1749 jlong java_lang_Thread::park_event(oop java_thread) { 1750 if (_park_event_offset > 0) { 1751 return java_thread->long_field(_park_event_offset); 1752 } 1753 return 0; 1754 } 1755 1756 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1757 if (_park_event_offset > 0) { 1758 java_thread->long_field_put(_park_event_offset, ptr); 1759 return true; 1760 } 1761 return false; 1762 } 1763 1764 1765 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1766 assert(_thread_status_offset != 0, "Must have thread status"); 1767 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1768 switch (status) { 1769 case NEW : return "NEW"; 1770 case RUNNABLE : return "RUNNABLE"; 1771 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1772 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1773 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1774 case PARKED : return "WAITING (parking)"; 1775 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1776 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1777 case TERMINATED : return "TERMINATED"; 1778 default : return "UNKNOWN"; 1779 }; 1780 } 1781 int java_lang_ThreadGroup::_parent_offset = 0; 1782 int java_lang_ThreadGroup::_name_offset = 0; 1783 int java_lang_ThreadGroup::_threads_offset = 0; 1784 int java_lang_ThreadGroup::_groups_offset = 0; 1785 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1786 int java_lang_ThreadGroup::_destroyed_offset = 0; 1787 int java_lang_ThreadGroup::_daemon_offset = 0; 1788 int java_lang_ThreadGroup::_nthreads_offset = 0; 1789 int java_lang_ThreadGroup::_ngroups_offset = 0; 1790 1791 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1792 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1793 return java_thread_group->obj_field(_parent_offset); 1794 } 1795 1796 // ("name as oop" accessor is not necessary) 1797 1798 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1799 oop name = java_thread_group->obj_field(_name_offset); 1800 // ThreadGroup.name can be null 1801 if (name != NULL) { 1802 return java_lang_String::as_utf8_string(name); 1803 } 1804 return NULL; 1805 } 1806 1807 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1808 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1809 return java_thread_group->int_field(_nthreads_offset); 1810 } 1811 1812 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1813 oop threads = java_thread_group->obj_field(_threads_offset); 1814 assert(threads != NULL, "threadgroups should have threads"); 1815 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1816 return objArrayOop(threads); 1817 } 1818 1819 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1820 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1821 return java_thread_group->int_field(_ngroups_offset); 1822 } 1823 1824 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1825 oop groups = java_thread_group->obj_field(_groups_offset); 1826 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1827 return objArrayOop(groups); 1828 } 1829 1830 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1831 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1832 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1833 } 1834 1835 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1836 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1837 return java_thread_group->bool_field(_destroyed_offset) != 0; 1838 } 1839 1840 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1841 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1842 return java_thread_group->bool_field(_daemon_offset) != 0; 1843 } 1844 1845 #define THREADGROUP_FIELDS_DO(macro) \ 1846 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1847 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1848 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1849 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1850 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1851 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1852 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1853 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1854 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1855 1856 void java_lang_ThreadGroup::compute_offsets() { 1857 assert(_parent_offset == 0, "offsets should be initialized only once"); 1858 1859 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1860 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1861 } 1862 1863 #if INCLUDE_CDS 1864 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1865 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1866 } 1867 #endif 1868 1869 #define THROWABLE_FIELDS_DO(macro) \ 1870 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1871 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1872 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1873 macro(depth_offset, k, "depth", int_signature, false); \ 1874 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1875 1876 void java_lang_Throwable::compute_offsets() { 1877 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1878 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1879 } 1880 1881 #if INCLUDE_CDS 1882 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1883 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1884 } 1885 #endif 1886 1887 oop java_lang_Throwable::unassigned_stacktrace() { 1888 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1889 oop base = ik->static_field_base_raw(); 1890 return base->obj_field(static_unassigned_stacktrace_offset); 1891 } 1892 1893 oop java_lang_Throwable::backtrace(oop throwable) { 1894 return throwable->obj_field_acquire(backtrace_offset); 1895 } 1896 1897 1898 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1899 throwable->release_obj_field_put(backtrace_offset, value); 1900 } 1901 1902 int java_lang_Throwable::depth(oop throwable) { 1903 return throwable->int_field(depth_offset); 1904 } 1905 1906 void java_lang_Throwable::set_depth(oop throwable, int value) { 1907 throwable->int_field_put(depth_offset, value); 1908 } 1909 1910 oop java_lang_Throwable::message(oop throwable) { 1911 return throwable->obj_field(detailMessage_offset); 1912 } 1913 1914 1915 // Return Symbol for detailed_message or NULL 1916 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1917 PRESERVE_EXCEPTION_MARK; // Keep original exception 1918 oop detailed_message = java_lang_Throwable::message(throwable); 1919 if (detailed_message != NULL) { 1920 return java_lang_String::as_symbol(detailed_message, THREAD); 1921 } 1922 return NULL; 1923 } 1924 1925 void java_lang_Throwable::set_message(oop throwable, oop value) { 1926 throwable->obj_field_put(detailMessage_offset, value); 1927 } 1928 1929 1930 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1931 throwable->obj_field_put(stackTrace_offset, st_element_array); 1932 } 1933 1934 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1935 set_stacktrace(throwable, NULL); 1936 } 1937 1938 1939 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1940 ResourceMark rm; 1941 Klass* k = throwable->klass(); 1942 assert(k != NULL, "just checking"); 1943 st->print("%s", k->external_name()); 1944 oop msg = message(throwable); 1945 if (msg != NULL) { 1946 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1947 } 1948 } 1949 1950 // After this many redefines, the stack trace is unreliable. 1951 const int MAX_VERSION = USHRT_MAX; 1952 1953 static inline bool version_matches(Method* method, int version) { 1954 assert(version < MAX_VERSION, "version is too big"); 1955 return method != NULL && (method->constants()->version() == version); 1956 } 1957 1958 1959 // This class provides a simple wrapper over the internal structure of 1960 // exception backtrace to insulate users of the backtrace from needing 1961 // to know what it looks like. 1962 class BacktraceBuilder: public StackObj { 1963 friend class BacktraceIterator; 1964 private: 1965 Handle _backtrace; 1966 objArrayOop _head; 1967 typeArrayOop _methods; 1968 typeArrayOop _bcis; 1969 objArrayOop _mirrors; 1970 typeArrayOop _names; // needed to insulate method name against redefinition 1971 int _index; 1972 NoSafepointVerifier _nsv; 1973 1974 enum { 1975 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1976 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1977 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1978 trace_names_offset = java_lang_Throwable::trace_names_offset, 1979 trace_next_offset = java_lang_Throwable::trace_next_offset, 1980 trace_size = java_lang_Throwable::trace_size, 1981 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1982 }; 1983 1984 // get info out of chunks 1985 static typeArrayOop get_methods(objArrayHandle chunk) { 1986 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1987 assert(methods != NULL, "method array should be initialized in backtrace"); 1988 return methods; 1989 } 1990 static typeArrayOop get_bcis(objArrayHandle chunk) { 1991 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1992 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1993 return bcis; 1994 } 1995 static objArrayOop get_mirrors(objArrayHandle chunk) { 1996 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1997 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1998 return mirrors; 1999 } 2000 static typeArrayOop get_names(objArrayHandle chunk) { 2001 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2002 assert(names != NULL, "names array should be initialized in backtrace"); 2003 return names; 2004 } 2005 2006 public: 2007 2008 // constructor for new backtrace 2009 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2010 expand(CHECK); 2011 _backtrace = Handle(THREAD, _head); 2012 _index = 0; 2013 } 2014 2015 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2016 _methods = get_methods(backtrace); 2017 _bcis = get_bcis(backtrace); 2018 _mirrors = get_mirrors(backtrace); 2019 _names = get_names(backtrace); 2020 assert(_methods->length() == _bcis->length() && 2021 _methods->length() == _mirrors->length() && 2022 _mirrors->length() == _names->length(), 2023 "method and source information arrays should match"); 2024 2025 // head is the preallocated backtrace 2026 _head = backtrace(); 2027 _backtrace = Handle(thread, _head); 2028 _index = 0; 2029 } 2030 2031 void expand(TRAPS) { 2032 objArrayHandle old_head(THREAD, _head); 2033 PauseNoSafepointVerifier pnsv(&_nsv); 2034 2035 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2036 objArrayHandle new_head(THREAD, head); 2037 2038 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2039 typeArrayHandle new_methods(THREAD, methods); 2040 2041 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2042 typeArrayHandle new_bcis(THREAD, bcis); 2043 2044 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2045 objArrayHandle new_mirrors(THREAD, mirrors); 2046 2047 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2048 typeArrayHandle new_names(THREAD, names); 2049 2050 if (!old_head.is_null()) { 2051 old_head->obj_at_put(trace_next_offset, new_head()); 2052 } 2053 new_head->obj_at_put(trace_methods_offset, new_methods()); 2054 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2055 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2056 new_head->obj_at_put(trace_names_offset, new_names()); 2057 2058 _head = new_head(); 2059 _methods = new_methods(); 2060 _bcis = new_bcis(); 2061 _mirrors = new_mirrors(); 2062 _names = new_names(); 2063 _index = 0; 2064 } 2065 2066 oop backtrace() { 2067 return _backtrace(); 2068 } 2069 2070 inline void push(Method* method, int bci, TRAPS) { 2071 // Smear the -1 bci to 0 since the array only holds unsigned 2072 // shorts. The later line number lookup would just smear the -1 2073 // to a 0 even if it could be recorded. 2074 if (bci == SynchronizationEntryBCI) bci = 0; 2075 2076 if (_index >= trace_chunk_size) { 2077 methodHandle mhandle(THREAD, method); 2078 expand(CHECK); 2079 method = mhandle(); 2080 } 2081 2082 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2083 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2084 2085 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2086 // klass owning the symbols alive so their refcounts aren't decremented. 2087 Symbol* name = method->name(); 2088 _names->symbol_at_put(_index, name); 2089 2090 // We need to save the mirrors in the backtrace to keep the class 2091 // from being unloaded while we still have this stack trace. 2092 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2093 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2094 _index++; 2095 } 2096 2097 }; 2098 2099 struct BacktraceElement : public StackObj { 2100 int _method_id; 2101 int _bci; 2102 int _version; 2103 Symbol* _name; 2104 Handle _mirror; 2105 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2106 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2107 }; 2108 2109 class BacktraceIterator : public StackObj { 2110 int _index; 2111 objArrayHandle _result; 2112 objArrayHandle _mirrors; 2113 typeArrayHandle _methods; 2114 typeArrayHandle _bcis; 2115 typeArrayHandle _names; 2116 2117 void init(objArrayHandle result, Thread* thread) { 2118 // Get method id, bci, version and mirror from chunk 2119 _result = result; 2120 if (_result.not_null()) { 2121 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2122 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2123 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2124 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2125 _index = 0; 2126 } 2127 } 2128 public: 2129 BacktraceIterator(objArrayHandle result, Thread* thread) { 2130 init(result, thread); 2131 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2132 } 2133 2134 BacktraceElement next(Thread* thread) { 2135 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2136 _methods->ushort_at(_index), 2137 Backtrace::version_at(_bcis->int_at(_index)), 2138 Backtrace::bci_at(_bcis->int_at(_index)), 2139 _names->symbol_at(_index)); 2140 _index++; 2141 2142 if (_index >= java_lang_Throwable::trace_chunk_size) { 2143 int next_offset = java_lang_Throwable::trace_next_offset; 2144 // Get next chunk 2145 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2146 init(result, thread); 2147 } 2148 return e; 2149 } 2150 2151 bool repeat() { 2152 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2153 } 2154 }; 2155 2156 2157 // Print stack trace element to resource allocated buffer 2158 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2159 int version, int bci, Symbol* name) { 2160 ResourceMark rm; 2161 2162 // Get strings and string lengths 2163 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2164 const char* klass_name = holder->external_name(); 2165 int buf_len = (int)strlen(klass_name); 2166 2167 char* method_name = name->as_C_string(); 2168 buf_len += (int)strlen(method_name); 2169 2170 char* source_file_name = NULL; 2171 Symbol* source = Backtrace::get_source_file_name(holder, version); 2172 if (source != NULL) { 2173 source_file_name = source->as_C_string(); 2174 buf_len += (int)strlen(source_file_name); 2175 } 2176 2177 char *module_name = NULL, *module_version = NULL; 2178 ModuleEntry* module = holder->module(); 2179 if (module->is_named()) { 2180 module_name = module->name()->as_C_string(); 2181 buf_len += (int)strlen(module_name); 2182 if (module->version() != NULL) { 2183 module_version = module->version()->as_C_string(); 2184 buf_len += (int)strlen(module_version); 2185 } 2186 } 2187 2188 // Allocate temporary buffer with extra space for formatting and line number 2189 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2190 2191 // Print stack trace line in buffer 2192 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2193 2194 // Print module information 2195 if (module_name != NULL) { 2196 if (module_version != NULL) { 2197 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2198 } else { 2199 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2200 } 2201 } 2202 2203 // The method can be NULL if the requested class version is gone 2204 Method* method = holder->method_with_orig_idnum(method_id, version); 2205 if (!version_matches(method, version)) { 2206 strcat(buf, "Redefined)"); 2207 } else { 2208 int line_number = Backtrace::get_line_number(method, bci); 2209 if (line_number == -2) { 2210 strcat(buf, "Native Method)"); 2211 } else { 2212 if (source_file_name != NULL && (line_number != -1)) { 2213 // Sourcename and linenumber 2214 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2215 } else if (source_file_name != NULL) { 2216 // Just sourcename 2217 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2218 } else { 2219 // Neither sourcename nor linenumber 2220 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2221 } 2222 CompiledMethod* nm = method->code(); 2223 if (WizardMode && nm != NULL) { 2224 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2225 } 2226 } 2227 } 2228 2229 st->print_cr("%s", buf); 2230 } 2231 2232 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2233 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2234 int method_id = method->orig_method_idnum(); 2235 int version = method->constants()->version(); 2236 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2237 } 2238 2239 /** 2240 * Print the throwable message and its stack trace plus all causes by walking the 2241 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2242 */ 2243 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2244 // First, print the message. 2245 print(throwable(), st); 2246 st->cr(); 2247 2248 // Now print the stack trace. 2249 Thread* THREAD = Thread::current(); 2250 while (throwable.not_null()) { 2251 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2252 if (result.is_null()) { 2253 st->print_raw_cr("\t<<no stack trace available>>"); 2254 return; 2255 } 2256 BacktraceIterator iter(result, THREAD); 2257 2258 while (iter.repeat()) { 2259 BacktraceElement bte = iter.next(THREAD); 2260 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2261 } 2262 { 2263 // Call getCause() which doesn't necessarily return the _cause field. 2264 EXCEPTION_MARK; 2265 JavaValue cause(T_OBJECT); 2266 JavaCalls::call_virtual(&cause, 2267 throwable, 2268 throwable->klass(), 2269 vmSymbols::getCause_name(), 2270 vmSymbols::void_throwable_signature(), 2271 THREAD); 2272 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2273 if (HAS_PENDING_EXCEPTION) { 2274 CLEAR_PENDING_EXCEPTION; 2275 throwable = Handle(); 2276 } else { 2277 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2278 if (throwable.not_null()) { 2279 st->print("Caused by: "); 2280 print(throwable(), st); 2281 st->cr(); 2282 } 2283 } 2284 } 2285 } 2286 } 2287 2288 /** 2289 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2290 */ 2291 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2292 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2293 JavaValue result(T_VOID); 2294 JavaCalls::call_virtual(&result, 2295 throwable, 2296 SystemDictionary::Throwable_klass(), 2297 vmSymbols::printStackTrace_name(), 2298 vmSymbols::void_method_signature(), 2299 THREAD); 2300 } 2301 2302 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2303 if (!StackTraceInThrowable) return; 2304 ResourceMark rm(THREAD); 2305 2306 // Start out by clearing the backtrace for this object, in case the VM 2307 // runs out of memory while allocating the stack trace 2308 set_backtrace(throwable(), NULL); 2309 // Clear lazily constructed Java level stacktrace if refilling occurs 2310 // This is unnecessary in 1.7+ but harmless 2311 clear_stacktrace(throwable()); 2312 2313 int max_depth = MaxJavaStackTraceDepth; 2314 JavaThread* thread = (JavaThread*)THREAD; 2315 2316 BacktraceBuilder bt(CHECK); 2317 2318 // If there is no Java frame just return the method that was being called 2319 // with bci 0 2320 if (!thread->has_last_Java_frame()) { 2321 if (max_depth >= 1 && method() != NULL) { 2322 bt.push(method(), 0, CHECK); 2323 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2324 set_depth(throwable(), 1); 2325 set_backtrace(throwable(), bt.backtrace()); 2326 } 2327 return; 2328 } 2329 2330 // Instead of using vframe directly, this version of fill_in_stack_trace 2331 // basically handles everything by hand. This significantly improved the 2332 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2333 // See bug 6333838 for more details. 2334 // The "ASSERT" here is to verify this method generates the exactly same stack 2335 // trace as utilizing vframe. 2336 #ifdef ASSERT 2337 vframeStream st(thread); 2338 methodHandle st_method(THREAD, st.method()); 2339 #endif 2340 int total_count = 0; 2341 RegisterMap map(thread, false); 2342 int decode_offset = 0; 2343 CompiledMethod* nm = NULL; 2344 bool skip_fillInStackTrace_check = false; 2345 bool skip_throwableInit_check = false; 2346 bool skip_hidden = !ShowHiddenFrames; 2347 2348 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2349 Method* method = NULL; 2350 int bci = 0; 2351 2352 // Compiled java method case. 2353 if (decode_offset != 0) { 2354 DebugInfoReadStream stream(nm, decode_offset); 2355 decode_offset = stream.read_int(); 2356 method = (Method*)nm->metadata_at(stream.read_int()); 2357 bci = stream.read_bci(); 2358 } else { 2359 if (fr.is_first_frame()) break; 2360 address pc = fr.pc(); 2361 if (fr.is_interpreted_frame()) { 2362 address bcp = fr.interpreter_frame_bcp(); 2363 method = fr.interpreter_frame_method(); 2364 bci = method->bci_from(bcp); 2365 fr = fr.sender(&map); 2366 } else { 2367 CodeBlob* cb = fr.cb(); 2368 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2369 // but non nmethod 2370 fr = fr.sender(&map); 2371 if (cb == NULL || !cb->is_compiled()) { 2372 continue; 2373 } 2374 nm = cb->as_compiled_method(); 2375 if (nm->method()->is_native()) { 2376 method = nm->method(); 2377 bci = 0; 2378 } else { 2379 PcDesc* pd = nm->pc_desc_at(pc); 2380 decode_offset = pd->scope_decode_offset(); 2381 // if decode_offset is not equal to 0, it will execute the 2382 // "compiled java method case" at the beginning of the loop. 2383 continue; 2384 } 2385 } 2386 } 2387 #ifdef ASSERT 2388 assert(st_method() == method && st.bci() == bci, 2389 "Wrong stack trace"); 2390 st.next(); 2391 // vframeStream::method isn't GC-safe so store off a copy 2392 // of the Method* in case we GC. 2393 if (!st.at_end()) { 2394 st_method = st.method(); 2395 } 2396 #endif 2397 2398 // the format of the stacktrace will be: 2399 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2400 // - 0 or more <init> methods for the exception class (skipped) 2401 // - rest of the stack 2402 2403 if (!skip_fillInStackTrace_check) { 2404 if (method->name() == vmSymbols::fillInStackTrace_name() && 2405 throwable->is_a(method->method_holder())) { 2406 continue; 2407 } 2408 else { 2409 skip_fillInStackTrace_check = true; // gone past them all 2410 } 2411 } 2412 if (!skip_throwableInit_check) { 2413 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2414 2415 // skip <init> methods of the exception class and superclasses 2416 // This is simlar to classic VM. 2417 if (method->name() == vmSymbols::object_initializer_name() && 2418 throwable->is_a(method->method_holder())) { 2419 continue; 2420 } else { 2421 // there are none or we've seen them all - either way stop checking 2422 skip_throwableInit_check = true; 2423 } 2424 } 2425 if (method->is_hidden()) { 2426 if (skip_hidden) continue; 2427 } 2428 bt.push(method, bci, CHECK); 2429 total_count++; 2430 } 2431 2432 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2433 2434 // Put completed stack trace into throwable object 2435 set_backtrace(throwable(), bt.backtrace()); 2436 set_depth(throwable(), total_count); 2437 } 2438 2439 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2440 // No-op if stack trace is disabled 2441 if (!StackTraceInThrowable) { 2442 return; 2443 } 2444 2445 // Disable stack traces for some preallocated out of memory errors 2446 if (!Universe::should_fill_in_stack_trace(throwable)) { 2447 return; 2448 } 2449 2450 PRESERVE_EXCEPTION_MARK; 2451 2452 JavaThread* thread = JavaThread::active(); 2453 fill_in_stack_trace(throwable, method, thread); 2454 // ignore exceptions thrown during stack trace filling 2455 CLEAR_PENDING_EXCEPTION; 2456 } 2457 2458 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2459 // Allocate stack trace - backtrace is created but not filled in 2460 2461 // No-op if stack trace is disabled 2462 if (!StackTraceInThrowable) return; 2463 BacktraceBuilder bt(CHECK); // creates a backtrace 2464 set_backtrace(throwable(), bt.backtrace()); 2465 } 2466 2467 2468 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2469 // Fill in stack trace into preallocated backtrace (no GC) 2470 2471 // No-op if stack trace is disabled 2472 if (!StackTraceInThrowable) return; 2473 2474 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2475 2476 JavaThread* THREAD = JavaThread::current(); 2477 2478 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2479 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2480 2481 ResourceMark rm(THREAD); 2482 vframeStream st(THREAD); 2483 2484 BacktraceBuilder bt(THREAD, backtrace); 2485 2486 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2487 // methods as preallocated errors aren't created by "java" code. 2488 2489 // fill in as much stack trace as possible 2490 int chunk_count = 0; 2491 for (;!st.at_end(); st.next()) { 2492 bt.push(st.method(), st.bci(), CHECK); 2493 chunk_count++; 2494 2495 // Bail-out for deep stacks 2496 if (chunk_count >= trace_chunk_size) break; 2497 } 2498 set_depth(throwable(), chunk_count); 2499 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2500 2501 // We support the Throwable immutability protocol defined for Java 7. 2502 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2503 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2504 } 2505 2506 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2507 objArrayHandle stack_trace_array_h, TRAPS) { 2508 2509 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2510 THROW(vmSymbols::java_lang_NullPointerException()); 2511 } 2512 2513 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2514 2515 if (stack_trace_array_h->length() != depth(throwable())) { 2516 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2517 } 2518 2519 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2520 BacktraceIterator iter(result, THREAD); 2521 2522 int index = 0; 2523 while (iter.repeat()) { 2524 BacktraceElement bte = iter.next(THREAD); 2525 2526 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2527 2528 if (stack_trace_element.is_null()) { 2529 THROW(vmSymbols::java_lang_NullPointerException()); 2530 } 2531 2532 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2533 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2534 2535 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2536 method, 2537 bte._version, 2538 bte._bci, 2539 bte._name, CHECK); 2540 } 2541 } 2542 2543 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2544 // Allocate java.lang.StackTraceElement instance 2545 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2546 assert(k != NULL, "must be loaded in 1.4+"); 2547 if (k->should_be_initialized()) { 2548 k->initialize(CHECK_0); 2549 } 2550 2551 Handle element = k->allocate_instance_handle(CHECK_0); 2552 2553 int version = method->constants()->version(); 2554 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2555 return element(); 2556 } 2557 2558 void java_lang_StackTraceElement::fill_in(Handle element, 2559 InstanceKlass* holder, const methodHandle& method, 2560 int version, int bci, Symbol* name, TRAPS) { 2561 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2562 2563 // Fill in class name 2564 ResourceMark rm(THREAD); 2565 const char* str = holder->external_name(); 2566 oop classname = StringTable::intern((char*) str, CHECK); 2567 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2568 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2569 2570 oop loader = holder->class_loader(); 2571 if (loader != NULL) { 2572 oop loader_name = java_lang_ClassLoader::name(loader); 2573 if (loader_name != NULL) 2574 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2575 } 2576 2577 // Fill in method name 2578 oop methodname = StringTable::intern(name, CHECK); 2579 java_lang_StackTraceElement::set_methodName(element(), methodname); 2580 2581 // Fill in module name and version 2582 ModuleEntry* module = holder->module(); 2583 if (module->is_named()) { 2584 oop module_name = StringTable::intern(module->name(), CHECK); 2585 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2586 oop module_version; 2587 if (module->version() != NULL) { 2588 module_version = StringTable::intern(module->version(), CHECK); 2589 } else { 2590 module_version = NULL; 2591 } 2592 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2593 } 2594 2595 if (method() == NULL || !version_matches(method(), version)) { 2596 // The method was redefined, accurate line number information isn't available 2597 java_lang_StackTraceElement::set_fileName(element(), NULL); 2598 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2599 } else { 2600 // Fill in source file name and line number. 2601 Symbol* source = Backtrace::get_source_file_name(holder, version); 2602 if (ShowHiddenFrames && source == NULL) 2603 source = vmSymbols::unknown_class_name(); 2604 oop filename = StringTable::intern(source, CHECK); 2605 java_lang_StackTraceElement::set_fileName(element(), filename); 2606 2607 int line_number = Backtrace::get_line_number(method, bci); 2608 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2609 } 2610 } 2611 2612 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2613 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2614 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2615 // we should expand MemberName::name when Throwable uses StackTrace 2616 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2617 return method; 2618 } 2619 2620 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2621 // set Method* or mid/cpref 2622 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2623 InstanceKlass* ik = method->method_holder(); 2624 CallInfo info(method(), ik, CHECK); 2625 MethodHandles::init_method_MemberName(mname, info); 2626 // set bci 2627 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2628 // method may be redefined; store the version 2629 int version = method->constants()->version(); 2630 assert((jushort)version == version, "version should be short"); 2631 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2632 } 2633 2634 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2635 ResourceMark rm(THREAD); 2636 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2637 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2638 InstanceKlass* holder = InstanceKlass::cast(clazz); 2639 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2640 2641 short version = stackFrame->short_field(_version_offset); 2642 short bci = stackFrame->short_field(_bci_offset); 2643 Symbol* name = method->name(); 2644 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2645 } 2646 2647 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2648 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2649 macro(_bci_offset, k, "bci", short_signature, false) 2650 2651 void java_lang_StackFrameInfo::compute_offsets() { 2652 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2653 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2654 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2655 } 2656 2657 #if INCLUDE_CDS 2658 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2659 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2660 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2661 } 2662 #endif 2663 2664 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2665 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2666 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2667 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2668 macro(_mode_offset, k, "mode", int_signature, false) 2669 2670 void java_lang_LiveStackFrameInfo::compute_offsets() { 2671 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2672 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2673 } 2674 2675 #if INCLUDE_CDS 2676 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2677 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2678 } 2679 #endif 2680 2681 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2682 macro(override_offset, k, "override", bool_signature, false) 2683 2684 void java_lang_reflect_AccessibleObject::compute_offsets() { 2685 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2686 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2687 } 2688 2689 #if INCLUDE_CDS 2690 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2691 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2692 } 2693 #endif 2694 2695 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2697 return (jboolean) reflect->bool_field(override_offset); 2698 } 2699 2700 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2701 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2702 reflect->bool_field_put(override_offset, (int) value); 2703 } 2704 2705 #define METHOD_FIELDS_DO(macro) \ 2706 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2707 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2708 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2709 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2710 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2711 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2712 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2713 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2714 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2715 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2716 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2717 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2718 2719 void java_lang_reflect_Method::compute_offsets() { 2720 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2721 // The generic signature and annotations fields are only present in 1.5 2722 signature_offset = -1; 2723 annotations_offset = -1; 2724 parameter_annotations_offset = -1; 2725 annotation_default_offset = -1; 2726 type_annotations_offset = -1; 2727 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2728 } 2729 2730 #if INCLUDE_CDS 2731 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2732 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2733 } 2734 #endif 2735 2736 Handle java_lang_reflect_Method::create(TRAPS) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 Klass* klass = SystemDictionary::reflect_Method_klass(); 2739 // This class is eagerly initialized during VM initialization, since we keep a refence 2740 // to one of the methods 2741 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2742 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2743 } 2744 2745 oop java_lang_reflect_Method::clazz(oop reflect) { 2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2747 return reflect->obj_field(clazz_offset); 2748 } 2749 2750 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2752 reflect->obj_field_put(clazz_offset, value); 2753 } 2754 2755 int java_lang_reflect_Method::slot(oop reflect) { 2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2757 return reflect->int_field(slot_offset); 2758 } 2759 2760 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2762 reflect->int_field_put(slot_offset, value); 2763 } 2764 2765 oop java_lang_reflect_Method::name(oop method) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 return method->obj_field(name_offset); 2768 } 2769 2770 void java_lang_reflect_Method::set_name(oop method, oop value) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 method->obj_field_put(name_offset, value); 2773 } 2774 2775 oop java_lang_reflect_Method::return_type(oop method) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 return method->obj_field(returnType_offset); 2778 } 2779 2780 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 method->obj_field_put(returnType_offset, value); 2783 } 2784 2785 oop java_lang_reflect_Method::parameter_types(oop method) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 return method->obj_field(parameterTypes_offset); 2788 } 2789 2790 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 method->obj_field_put(parameterTypes_offset, value); 2793 } 2794 2795 oop java_lang_reflect_Method::exception_types(oop method) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 return method->obj_field(exceptionTypes_offset); 2798 } 2799 2800 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 method->obj_field_put(exceptionTypes_offset, value); 2803 } 2804 2805 int java_lang_reflect_Method::modifiers(oop method) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 return method->int_field(modifiers_offset); 2808 } 2809 2810 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 method->int_field_put(modifiers_offset, value); 2813 } 2814 2815 bool java_lang_reflect_Method::has_signature_field() { 2816 return (signature_offset >= 0); 2817 } 2818 2819 oop java_lang_reflect_Method::signature(oop method) { 2820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2821 assert(has_signature_field(), "signature field must be present"); 2822 return method->obj_field(signature_offset); 2823 } 2824 2825 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2827 assert(has_signature_field(), "signature field must be present"); 2828 method->obj_field_put(signature_offset, value); 2829 } 2830 2831 bool java_lang_reflect_Method::has_annotations_field() { 2832 return (annotations_offset >= 0); 2833 } 2834 2835 oop java_lang_reflect_Method::annotations(oop method) { 2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2837 assert(has_annotations_field(), "annotations field must be present"); 2838 return method->obj_field(annotations_offset); 2839 } 2840 2841 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2843 assert(has_annotations_field(), "annotations field must be present"); 2844 method->obj_field_put(annotations_offset, value); 2845 } 2846 2847 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2848 return (parameter_annotations_offset >= 0); 2849 } 2850 2851 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2853 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2854 return method->obj_field(parameter_annotations_offset); 2855 } 2856 2857 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2858 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2859 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2860 method->obj_field_put(parameter_annotations_offset, value); 2861 } 2862 2863 bool java_lang_reflect_Method::has_annotation_default_field() { 2864 return (annotation_default_offset >= 0); 2865 } 2866 2867 oop java_lang_reflect_Method::annotation_default(oop method) { 2868 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2869 assert(has_annotation_default_field(), "annotation default field must be present"); 2870 return method->obj_field(annotation_default_offset); 2871 } 2872 2873 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2875 assert(has_annotation_default_field(), "annotation default field must be present"); 2876 method->obj_field_put(annotation_default_offset, value); 2877 } 2878 2879 bool java_lang_reflect_Method::has_type_annotations_field() { 2880 return (type_annotations_offset >= 0); 2881 } 2882 2883 oop java_lang_reflect_Method::type_annotations(oop method) { 2884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2885 assert(has_type_annotations_field(), "type_annotations field must be present"); 2886 return method->obj_field(type_annotations_offset); 2887 } 2888 2889 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2891 assert(has_type_annotations_field(), "type_annotations field must be present"); 2892 method->obj_field_put(type_annotations_offset, value); 2893 } 2894 2895 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2896 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2897 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2898 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2899 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2900 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2901 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2902 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2903 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2904 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2905 2906 2907 void java_lang_reflect_Constructor::compute_offsets() { 2908 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2909 // The generic signature and annotations fields are only present in 1.5 2910 signature_offset = -1; 2911 annotations_offset = -1; 2912 parameter_annotations_offset = -1; 2913 type_annotations_offset = -1; 2914 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2915 } 2916 2917 #if INCLUDE_CDS 2918 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2919 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2920 } 2921 #endif 2922 2923 Handle java_lang_reflect_Constructor::create(TRAPS) { 2924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2925 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2926 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2927 InstanceKlass* ik = InstanceKlass::cast(k); 2928 // Ensure it is initialized 2929 ik->initialize(CHECK_NH); 2930 return ik->allocate_instance_handle(THREAD); 2931 } 2932 2933 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2935 return reflect->obj_field(clazz_offset); 2936 } 2937 2938 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2940 reflect->obj_field_put(clazz_offset, value); 2941 } 2942 2943 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2945 return constructor->obj_field(parameterTypes_offset); 2946 } 2947 2948 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2950 constructor->obj_field_put(parameterTypes_offset, value); 2951 } 2952 2953 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2955 return constructor->obj_field(exceptionTypes_offset); 2956 } 2957 2958 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2960 constructor->obj_field_put(exceptionTypes_offset, value); 2961 } 2962 2963 int java_lang_reflect_Constructor::slot(oop reflect) { 2964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2965 return reflect->int_field(slot_offset); 2966 } 2967 2968 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2970 reflect->int_field_put(slot_offset, value); 2971 } 2972 2973 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2975 return constructor->int_field(modifiers_offset); 2976 } 2977 2978 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2980 constructor->int_field_put(modifiers_offset, value); 2981 } 2982 2983 bool java_lang_reflect_Constructor::has_signature_field() { 2984 return (signature_offset >= 0); 2985 } 2986 2987 oop java_lang_reflect_Constructor::signature(oop constructor) { 2988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2989 assert(has_signature_field(), "signature field must be present"); 2990 return constructor->obj_field(signature_offset); 2991 } 2992 2993 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2995 assert(has_signature_field(), "signature field must be present"); 2996 constructor->obj_field_put(signature_offset, value); 2997 } 2998 2999 bool java_lang_reflect_Constructor::has_annotations_field() { 3000 return (annotations_offset >= 0); 3001 } 3002 3003 oop java_lang_reflect_Constructor::annotations(oop constructor) { 3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3005 assert(has_annotations_field(), "annotations field must be present"); 3006 return constructor->obj_field(annotations_offset); 3007 } 3008 3009 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3011 assert(has_annotations_field(), "annotations field must be present"); 3012 constructor->obj_field_put(annotations_offset, value); 3013 } 3014 3015 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 3016 return (parameter_annotations_offset >= 0); 3017 } 3018 3019 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3021 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3022 return method->obj_field(parameter_annotations_offset); 3023 } 3024 3025 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3027 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3028 method->obj_field_put(parameter_annotations_offset, value); 3029 } 3030 3031 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3032 return (type_annotations_offset >= 0); 3033 } 3034 3035 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3037 assert(has_type_annotations_field(), "type_annotations field must be present"); 3038 return constructor->obj_field(type_annotations_offset); 3039 } 3040 3041 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3043 assert(has_type_annotations_field(), "type_annotations field must be present"); 3044 constructor->obj_field_put(type_annotations_offset, value); 3045 } 3046 3047 #define FIELD_FIELDS_DO(macro) \ 3048 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3049 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3050 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3051 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3052 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3053 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3054 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3055 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3056 3057 void java_lang_reflect_Field::compute_offsets() { 3058 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3059 // The generic signature and annotations fields are only present in 1.5 3060 signature_offset = -1; 3061 annotations_offset = -1; 3062 type_annotations_offset = -1; 3063 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3064 } 3065 3066 #if INCLUDE_CDS 3067 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3068 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3069 } 3070 #endif 3071 3072 Handle java_lang_reflect_Field::create(TRAPS) { 3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3074 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3075 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3076 InstanceKlass* ik = InstanceKlass::cast(k); 3077 // Ensure it is initialized 3078 ik->initialize(CHECK_NH); 3079 return ik->allocate_instance_handle(THREAD); 3080 } 3081 3082 oop java_lang_reflect_Field::clazz(oop reflect) { 3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3084 return reflect->obj_field(clazz_offset); 3085 } 3086 3087 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3089 reflect->obj_field_put(clazz_offset, value); 3090 } 3091 3092 oop java_lang_reflect_Field::name(oop field) { 3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3094 return field->obj_field(name_offset); 3095 } 3096 3097 void java_lang_reflect_Field::set_name(oop field, oop value) { 3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3099 field->obj_field_put(name_offset, value); 3100 } 3101 3102 oop java_lang_reflect_Field::type(oop field) { 3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3104 return field->obj_field(type_offset); 3105 } 3106 3107 void java_lang_reflect_Field::set_type(oop field, oop value) { 3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3109 field->obj_field_put(type_offset, value); 3110 } 3111 3112 int java_lang_reflect_Field::slot(oop reflect) { 3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3114 return reflect->int_field(slot_offset); 3115 } 3116 3117 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3119 reflect->int_field_put(slot_offset, value); 3120 } 3121 3122 int java_lang_reflect_Field::modifiers(oop field) { 3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3124 return field->int_field(modifiers_offset); 3125 } 3126 3127 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3129 field->int_field_put(modifiers_offset, value); 3130 } 3131 3132 bool java_lang_reflect_Field::has_signature_field() { 3133 return (signature_offset >= 0); 3134 } 3135 3136 oop java_lang_reflect_Field::signature(oop field) { 3137 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3138 assert(has_signature_field(), "signature field must be present"); 3139 return field->obj_field(signature_offset); 3140 } 3141 3142 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3144 assert(has_signature_field(), "signature field must be present"); 3145 field->obj_field_put(signature_offset, value); 3146 } 3147 3148 bool java_lang_reflect_Field::has_annotations_field() { 3149 return (annotations_offset >= 0); 3150 } 3151 3152 oop java_lang_reflect_Field::annotations(oop field) { 3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3154 assert(has_annotations_field(), "annotations field must be present"); 3155 return field->obj_field(annotations_offset); 3156 } 3157 3158 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3160 assert(has_annotations_field(), "annotations field must be present"); 3161 field->obj_field_put(annotations_offset, value); 3162 } 3163 3164 bool java_lang_reflect_Field::has_type_annotations_field() { 3165 return (type_annotations_offset >= 0); 3166 } 3167 3168 oop java_lang_reflect_Field::type_annotations(oop field) { 3169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3170 assert(has_type_annotations_field(), "type_annotations field must be present"); 3171 return field->obj_field(type_annotations_offset); 3172 } 3173 3174 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3176 assert(has_type_annotations_field(), "type_annotations field must be present"); 3177 field->obj_field_put(type_annotations_offset, value); 3178 } 3179 3180 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3181 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3182 3183 void reflect_ConstantPool::compute_offsets() { 3184 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3185 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3186 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3187 } 3188 3189 #if INCLUDE_CDS 3190 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3191 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3192 } 3193 #endif 3194 3195 #define PARAMETER_FIELDS_DO(macro) \ 3196 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3197 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3198 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3199 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3200 3201 void java_lang_reflect_Parameter::compute_offsets() { 3202 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3203 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3204 } 3205 3206 #if INCLUDE_CDS 3207 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3208 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3209 } 3210 #endif 3211 3212 Handle java_lang_reflect_Parameter::create(TRAPS) { 3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3214 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3215 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3216 InstanceKlass* ik = InstanceKlass::cast(k); 3217 // Ensure it is initialized 3218 ik->initialize(CHECK_NH); 3219 return ik->allocate_instance_handle(THREAD); 3220 } 3221 3222 oop java_lang_reflect_Parameter::name(oop param) { 3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3224 return param->obj_field(name_offset); 3225 } 3226 3227 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3229 param->obj_field_put(name_offset, value); 3230 } 3231 3232 int java_lang_reflect_Parameter::modifiers(oop param) { 3233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3234 return param->int_field(modifiers_offset); 3235 } 3236 3237 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3239 param->int_field_put(modifiers_offset, value); 3240 } 3241 3242 int java_lang_reflect_Parameter::index(oop param) { 3243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3244 return param->int_field(index_offset); 3245 } 3246 3247 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3249 param->int_field_put(index_offset, value); 3250 } 3251 3252 oop java_lang_reflect_Parameter::executable(oop param) { 3253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3254 return param->obj_field(executable_offset); 3255 } 3256 3257 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3259 param->obj_field_put(executable_offset, value); 3260 } 3261 3262 3263 int java_lang_Module::loader_offset; 3264 int java_lang_Module::name_offset; 3265 int java_lang_Module::_module_entry_offset = -1; 3266 3267 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3269 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3270 vmSymbols::java_lang_module_init_signature(), 3271 loader, module_name, CHECK_NH); 3272 } 3273 3274 #define MODULE_FIELDS_DO(macro) \ 3275 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3276 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3277 3278 void java_lang_Module::compute_offsets() { 3279 InstanceKlass* k = SystemDictionary::Module_klass(); 3280 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3281 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3282 } 3283 3284 #if INCLUDE_CDS 3285 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3286 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3287 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3288 } 3289 #endif 3290 3291 oop java_lang_Module::loader(oop module) { 3292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3293 return module->obj_field(loader_offset); 3294 } 3295 3296 void java_lang_Module::set_loader(oop module, oop value) { 3297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3298 module->obj_field_put(loader_offset, value); 3299 } 3300 3301 oop java_lang_Module::name(oop module) { 3302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3303 return module->obj_field(name_offset); 3304 } 3305 3306 void java_lang_Module::set_name(oop module, oop value) { 3307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3308 module->obj_field_put(name_offset, value); 3309 } 3310 3311 ModuleEntry* java_lang_Module::module_entry(oop module) { 3312 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3313 assert(module != NULL, "module can't be null"); 3314 assert(oopDesc::is_oop(module), "module must be oop"); 3315 3316 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3317 if (module_entry == NULL) { 3318 // If the inject field containing the ModuleEntry* is null then return the 3319 // class loader's unnamed module. 3320 oop loader = java_lang_Module::loader(module); 3321 Handle h_loader = Handle(Thread::current(), loader); 3322 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3323 return loader_cld->unnamed_module(); 3324 } 3325 return module_entry; 3326 } 3327 3328 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3329 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3330 assert(module != NULL, "module can't be null"); 3331 assert(oopDesc::is_oop(module), "module must be oop"); 3332 module->address_field_put(_module_entry_offset, (address)module_entry); 3333 } 3334 3335 Handle reflect_ConstantPool::create(TRAPS) { 3336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3337 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3338 // Ensure it is initialized 3339 k->initialize(CHECK_NH); 3340 return k->allocate_instance_handle(THREAD); 3341 } 3342 3343 3344 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3346 oop mirror = value->pool_holder()->java_mirror(); 3347 // Save the mirror to get back the constant pool. 3348 reflect->obj_field_put(_oop_offset, mirror); 3349 } 3350 3351 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3353 3354 oop mirror = reflect->obj_field(_oop_offset); 3355 Klass* k = java_lang_Class::as_Klass(mirror); 3356 assert(k->is_instance_klass(), "Must be"); 3357 3358 // Get the constant pool back from the klass. Since class redefinition 3359 // merges the new constant pool into the old, this is essentially the 3360 // same constant pool as the original. If constant pool merging is 3361 // no longer done in the future, this will have to change to save 3362 // the original. 3363 return InstanceKlass::cast(k)->constants(); 3364 } 3365 3366 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3367 macro(_base_offset, k, "base", object_signature, false) 3368 3369 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3370 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3371 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3372 } 3373 3374 #if INCLUDE_CDS 3375 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3376 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3377 } 3378 #endif 3379 3380 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3381 Klass* k = SystemDictionary::box_klass(type); 3382 if (k == NULL) return NULL; 3383 InstanceKlass* ik = InstanceKlass::cast(k); 3384 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3385 return ik->allocate_instance(THREAD); 3386 } 3387 3388 3389 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3390 oop box = initialize_and_allocate(type, CHECK_0); 3391 if (box == NULL) return NULL; 3392 switch (type) { 3393 case T_BOOLEAN: 3394 box->bool_field_put(value_offset, value->z); 3395 break; 3396 case T_CHAR: 3397 box->char_field_put(value_offset, value->c); 3398 break; 3399 case T_FLOAT: 3400 box->float_field_put(value_offset, value->f); 3401 break; 3402 case T_DOUBLE: 3403 box->double_field_put(long_value_offset, value->d); 3404 break; 3405 case T_BYTE: 3406 box->byte_field_put(value_offset, value->b); 3407 break; 3408 case T_SHORT: 3409 box->short_field_put(value_offset, value->s); 3410 break; 3411 case T_INT: 3412 box->int_field_put(value_offset, value->i); 3413 break; 3414 case T_LONG: 3415 box->long_field_put(long_value_offset, value->j); 3416 break; 3417 default: 3418 return NULL; 3419 } 3420 return box; 3421 } 3422 3423 3424 BasicType java_lang_boxing_object::basic_type(oop box) { 3425 if (box == NULL) return T_ILLEGAL; 3426 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3427 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3428 return T_ILLEGAL; 3429 return type; 3430 } 3431 3432 3433 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3434 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3435 switch (type) { 3436 case T_BOOLEAN: 3437 value->z = box->bool_field(value_offset); 3438 break; 3439 case T_CHAR: 3440 value->c = box->char_field(value_offset); 3441 break; 3442 case T_FLOAT: 3443 value->f = box->float_field(value_offset); 3444 break; 3445 case T_DOUBLE: 3446 value->d = box->double_field(long_value_offset); 3447 break; 3448 case T_BYTE: 3449 value->b = box->byte_field(value_offset); 3450 break; 3451 case T_SHORT: 3452 value->s = box->short_field(value_offset); 3453 break; 3454 case T_INT: 3455 value->i = box->int_field(value_offset); 3456 break; 3457 case T_LONG: 3458 value->j = box->long_field(long_value_offset); 3459 break; 3460 default: 3461 return T_ILLEGAL; 3462 } // end switch 3463 return type; 3464 } 3465 3466 3467 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3468 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3469 switch (type) { 3470 case T_BOOLEAN: 3471 box->bool_field_put(value_offset, value->z); 3472 break; 3473 case T_CHAR: 3474 box->char_field_put(value_offset, value->c); 3475 break; 3476 case T_FLOAT: 3477 box->float_field_put(value_offset, value->f); 3478 break; 3479 case T_DOUBLE: 3480 box->double_field_put(long_value_offset, value->d); 3481 break; 3482 case T_BYTE: 3483 box->byte_field_put(value_offset, value->b); 3484 break; 3485 case T_SHORT: 3486 box->short_field_put(value_offset, value->s); 3487 break; 3488 case T_INT: 3489 box->int_field_put(value_offset, value->i); 3490 break; 3491 case T_LONG: 3492 box->long_field_put(long_value_offset, value->j); 3493 break; 3494 default: 3495 return T_ILLEGAL; 3496 } // end switch 3497 return type; 3498 } 3499 3500 3501 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3502 switch (type) { 3503 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3504 case T_CHAR: st->print("%d", value->c); break; 3505 case T_BYTE: st->print("%d", value->b); break; 3506 case T_SHORT: st->print("%d", value->s); break; 3507 case T_INT: st->print("%d", value->i); break; 3508 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3509 case T_FLOAT: st->print("%f", value->f); break; 3510 case T_DOUBLE: st->print("%lf", value->d); break; 3511 default: st->print("type %d?", type); break; 3512 } 3513 } 3514 3515 // Support for java_lang_ref_Reference 3516 3517 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3518 assert(obj != NULL, "sanity"); 3519 if (offset != java_lang_ref_Reference::referent_offset) { 3520 return false; 3521 } 3522 3523 Klass* k = obj->klass(); 3524 if (!k->is_instance_klass()) { 3525 return false; 3526 } 3527 3528 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3529 bool is_reference = ik->reference_type() != REF_NONE; 3530 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3531 return is_reference; 3532 } 3533 3534 // Support for java_lang_ref_SoftReference 3535 // 3536 3537 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3538 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3539 macro(static_clock_offset, k, "clock", long_signature, true) 3540 3541 void java_lang_ref_SoftReference::compute_offsets() { 3542 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3543 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3544 } 3545 3546 #if INCLUDE_CDS 3547 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3548 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3549 } 3550 #endif 3551 3552 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3553 return ref->long_field(timestamp_offset); 3554 } 3555 3556 jlong java_lang_ref_SoftReference::clock() { 3557 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3558 oop base = ik->static_field_base_raw(); 3559 return base->long_field(static_clock_offset); 3560 } 3561 3562 void java_lang_ref_SoftReference::set_clock(jlong value) { 3563 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3564 oop base = ik->static_field_base_raw(); 3565 base->long_field_put(static_clock_offset, value); 3566 } 3567 3568 // Support for java_lang_invoke_DirectMethodHandle 3569 3570 int java_lang_invoke_DirectMethodHandle::_member_offset; 3571 3572 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3573 oop member_name = NULL; 3574 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3575 "a DirectMethodHandle oop is expected"); 3576 return dmh->obj_field(member_offset_in_bytes()); 3577 } 3578 3579 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3580 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3581 3582 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3583 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3584 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3585 } 3586 3587 #if INCLUDE_CDS 3588 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3589 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3590 } 3591 #endif 3592 3593 // Support for java_lang_invoke_MethodHandle 3594 3595 int java_lang_invoke_MethodHandle::_type_offset; 3596 int java_lang_invoke_MethodHandle::_form_offset; 3597 3598 int java_lang_invoke_MemberName::_clazz_offset; 3599 int java_lang_invoke_MemberName::_name_offset; 3600 int java_lang_invoke_MemberName::_type_offset; 3601 int java_lang_invoke_MemberName::_flags_offset; 3602 int java_lang_invoke_MemberName::_method_offset; 3603 int java_lang_invoke_MemberName::_vmindex_offset; 3604 3605 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3606 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3607 3608 int java_lang_invoke_LambdaForm::_vmentry_offset; 3609 3610 #define METHODHANDLE_FIELDS_DO(macro) \ 3611 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3612 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3613 3614 void java_lang_invoke_MethodHandle::compute_offsets() { 3615 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3616 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3617 } 3618 3619 #if INCLUDE_CDS 3620 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3621 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3622 } 3623 #endif 3624 3625 #define MEMBERNAME_FIELDS_DO(macro) \ 3626 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3627 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3628 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3629 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3630 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3631 3632 void java_lang_invoke_MemberName::compute_offsets() { 3633 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3634 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3635 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3636 } 3637 3638 #if INCLUDE_CDS 3639 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3640 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3641 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3642 } 3643 #endif 3644 3645 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3646 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3647 assert(k != NULL, "jdk mismatch"); 3648 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3649 } 3650 3651 #if INCLUDE_CDS 3652 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3653 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3654 } 3655 #endif 3656 3657 #define LAMBDAFORM_FIELDS_DO(macro) \ 3658 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3659 3660 void java_lang_invoke_LambdaForm::compute_offsets() { 3661 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3662 assert (k != NULL, "jdk mismatch"); 3663 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3664 } 3665 3666 #if INCLUDE_CDS 3667 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3668 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3669 } 3670 #endif 3671 3672 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3673 return obj != NULL && is_subclass(obj->klass()); 3674 } 3675 3676 3677 oop java_lang_invoke_MethodHandle::type(oop mh) { 3678 return mh->obj_field(_type_offset); 3679 } 3680 3681 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3682 mh->obj_field_put(_type_offset, mtype); 3683 } 3684 3685 oop java_lang_invoke_MethodHandle::form(oop mh) { 3686 assert(_form_offset != 0, ""); 3687 return mh->obj_field(_form_offset); 3688 } 3689 3690 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3691 assert(_form_offset != 0, ""); 3692 mh->obj_field_put(_form_offset, lform); 3693 } 3694 3695 /// MemberName accessors 3696 3697 oop java_lang_invoke_MemberName::clazz(oop mname) { 3698 assert(is_instance(mname), "wrong type"); 3699 return mname->obj_field(_clazz_offset); 3700 } 3701 3702 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3703 assert(is_instance(mname), "wrong type"); 3704 mname->obj_field_put(_clazz_offset, clazz); 3705 } 3706 3707 oop java_lang_invoke_MemberName::name(oop mname) { 3708 assert(is_instance(mname), "wrong type"); 3709 return mname->obj_field(_name_offset); 3710 } 3711 3712 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3713 assert(is_instance(mname), "wrong type"); 3714 mname->obj_field_put(_name_offset, name); 3715 } 3716 3717 oop java_lang_invoke_MemberName::type(oop mname) { 3718 assert(is_instance(mname), "wrong type"); 3719 return mname->obj_field(_type_offset); 3720 } 3721 3722 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3723 assert(is_instance(mname), "wrong type"); 3724 mname->obj_field_put(_type_offset, type); 3725 } 3726 3727 int java_lang_invoke_MemberName::flags(oop mname) { 3728 assert(is_instance(mname), "wrong type"); 3729 return mname->int_field(_flags_offset); 3730 } 3731 3732 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3733 assert(is_instance(mname), "wrong type"); 3734 mname->int_field_put(_flags_offset, flags); 3735 } 3736 3737 3738 // Return vmtarget from ResolvedMethodName method field through indirection 3739 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3740 assert(is_instance(mname), "wrong type"); 3741 oop method = mname->obj_field(_method_offset); 3742 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3743 } 3744 3745 bool java_lang_invoke_MemberName::is_method(oop mname) { 3746 assert(is_instance(mname), "must be MemberName"); 3747 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3748 } 3749 3750 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3751 assert(is_instance(mname), "wrong type"); 3752 mname->obj_field_put(_method_offset, resolved_method); 3753 } 3754 3755 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3756 assert(is_instance(mname), "wrong type"); 3757 return (intptr_t) mname->address_field(_vmindex_offset); 3758 } 3759 3760 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3761 assert(is_instance(mname), "wrong type"); 3762 mname->address_field_put(_vmindex_offset, (address) index); 3763 } 3764 3765 3766 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3767 assert(is_instance(resolved_method), "wrong type"); 3768 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3769 assert(m->is_method(), "must be"); 3770 return m; 3771 } 3772 3773 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3774 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3775 assert(is_instance(resolved_method), "wrong type"); 3776 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3777 } 3778 3779 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3780 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3781 oop resolved_method = ResolvedMethodTable::find_method(m()); 3782 if (resolved_method == NULL) { 3783 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3784 if (!k->is_initialized()) { 3785 k->initialize(CHECK_NULL); 3786 } 3787 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3788 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3789 // Add a reference to the loader (actually mirror because anonymous classes will not have 3790 // distinct loaders) to ensure the metadata is kept alive. 3791 // This mirror may be different than the one in clazz field. 3792 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3793 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3794 } 3795 return resolved_method; 3796 } 3797 3798 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3799 assert(is_instance(lform), "wrong type"); 3800 return lform->obj_field(_vmentry_offset); 3801 } 3802 3803 3804 // Support for java_lang_invoke_MethodType 3805 3806 int java_lang_invoke_MethodType::_rtype_offset; 3807 int java_lang_invoke_MethodType::_ptypes_offset; 3808 3809 #define METHODTYPE_FIELDS_DO(macro) \ 3810 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3811 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3812 3813 void java_lang_invoke_MethodType::compute_offsets() { 3814 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3815 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3816 } 3817 3818 #if INCLUDE_CDS 3819 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3820 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3821 } 3822 #endif 3823 3824 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3825 st->print("("); 3826 objArrayOop pts = ptypes(mt); 3827 for (int i = 0, limit = pts->length(); i < limit; i++) { 3828 java_lang_Class::print_signature(pts->obj_at(i), st); 3829 } 3830 st->print(")"); 3831 java_lang_Class::print_signature(rtype(mt), st); 3832 } 3833 3834 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3835 ResourceMark rm; 3836 stringStream buffer(128); 3837 print_signature(mt, &buffer); 3838 const char* sigstr = buffer.base(); 3839 int siglen = (int) buffer.size(); 3840 Symbol *name; 3841 if (!intern_if_not_found) { 3842 name = SymbolTable::probe(sigstr, siglen); 3843 } else { 3844 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3845 } 3846 return name; 3847 } 3848 3849 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3850 if (oopDesc::equals(mt1, mt2)) 3851 return true; 3852 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3853 return false; 3854 if (ptype_count(mt1) != ptype_count(mt2)) 3855 return false; 3856 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3857 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3858 return false; 3859 } 3860 return true; 3861 } 3862 3863 oop java_lang_invoke_MethodType::rtype(oop mt) { 3864 assert(is_instance(mt), "must be a MethodType"); 3865 return mt->obj_field(_rtype_offset); 3866 } 3867 3868 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3869 assert(is_instance(mt), "must be a MethodType"); 3870 return (objArrayOop) mt->obj_field(_ptypes_offset); 3871 } 3872 3873 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3874 return ptypes(mt)->obj_at(idx); 3875 } 3876 3877 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3878 return ptypes(mt)->length(); 3879 } 3880 3881 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3882 objArrayOop pts = ptypes(mt); 3883 int count = pts->length(); 3884 int slots = 0; 3885 for (int i = 0; i < count; i++) { 3886 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3887 slots += type2size[bt]; 3888 } 3889 return slots; 3890 } 3891 3892 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3893 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3894 return type2size[bt]; 3895 } 3896 3897 3898 // Support for java_lang_invoke_CallSite 3899 3900 int java_lang_invoke_CallSite::_target_offset; 3901 int java_lang_invoke_CallSite::_context_offset; 3902 3903 #define CALLSITE_FIELDS_DO(macro) \ 3904 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3905 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3906 3907 void java_lang_invoke_CallSite::compute_offsets() { 3908 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3909 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3910 } 3911 3912 #if INCLUDE_CDS 3913 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3914 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3915 } 3916 #endif 3917 3918 oop java_lang_invoke_CallSite::context(oop call_site) { 3919 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3920 3921 oop dep_oop = call_site->obj_field(_context_offset); 3922 return dep_oop; 3923 } 3924 3925 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3926 3927 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3928 3929 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3930 InstanceKlass* k = SystemDictionary::Context_klass(); 3931 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3932 } 3933 3934 #if INCLUDE_CDS 3935 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3936 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3937 } 3938 #endif 3939 3940 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3941 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3942 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3943 DependencyContext dep_ctx(vmdeps_addr); 3944 return dep_ctx; 3945 } 3946 3947 // Support for java_security_AccessControlContext 3948 3949 int java_security_AccessControlContext::_context_offset = 0; 3950 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3951 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3952 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3953 3954 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3955 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3956 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3957 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3958 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3959 3960 void java_security_AccessControlContext::compute_offsets() { 3961 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3962 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3963 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3964 } 3965 3966 #if INCLUDE_CDS 3967 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3968 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3969 } 3970 #endif 3971 3972 bool java_security_AccessControlContext::is_authorized(Handle context) { 3973 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3974 assert(_isAuthorized_offset != -1, "should be set"); 3975 return context->bool_field(_isAuthorized_offset) != 0; 3976 } 3977 3978 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3979 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3980 // Ensure klass is initialized 3981 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3982 // Allocate result 3983 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3984 // Fill in values 3985 result->obj_field_put(_context_offset, context()); 3986 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3987 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3988 // whitelist AccessControlContexts created by the JVM if present 3989 if (_isAuthorized_offset != -1) { 3990 result->bool_field_put(_isAuthorized_offset, true); 3991 } 3992 return result; 3993 } 3994 3995 3996 // Support for java_lang_ClassLoader 3997 3998 bool java_lang_ClassLoader::offsets_computed = false; 3999 int java_lang_ClassLoader::_loader_data_offset = -1; 4000 int java_lang_ClassLoader::parallelCapable_offset = -1; 4001 int java_lang_ClassLoader::name_offset = -1; 4002 int java_lang_ClassLoader::nameAndId_offset = -1; 4003 int java_lang_ClassLoader::unnamedModule_offset = -1; 4004 4005 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4006 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4007 return HeapAccess<>::load_at(loader, _loader_data_offset); 4008 } 4009 4010 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) { 4011 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4012 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data); 4013 } 4014 4015 #define CLASSLOADER_FIELDS_DO(macro) \ 4016 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4017 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4018 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4019 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4020 macro(parent_offset, k1, "parent", classloader_signature, false) 4021 4022 void java_lang_ClassLoader::compute_offsets() { 4023 assert(!offsets_computed, "offsets should be initialized only once"); 4024 offsets_computed = true; 4025 4026 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4027 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4028 4029 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4030 } 4031 4032 #if INCLUDE_CDS 4033 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4034 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4035 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4036 } 4037 #endif 4038 4039 oop java_lang_ClassLoader::parent(oop loader) { 4040 assert(is_instance(loader), "loader must be oop"); 4041 return loader->obj_field(parent_offset); 4042 } 4043 4044 // Returns the name field of this class loader. If the name field has not 4045 // been set, null will be returned. 4046 oop java_lang_ClassLoader::name(oop loader) { 4047 assert(is_instance(loader), "loader must be oop"); 4048 return loader->obj_field(name_offset); 4049 } 4050 4051 // Returns the nameAndId field of this class loader. The format is 4052 // as follows: 4053 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4054 // If the defining loader has no name then <qualified-class-name> @<id> 4055 // If built-in loader, then omit '@<id>' as there is only one instance. 4056 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4057 oop java_lang_ClassLoader::nameAndId(oop loader) { 4058 assert(is_instance(loader), "loader must be oop"); 4059 return loader->obj_field(nameAndId_offset); 4060 } 4061 4062 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4063 assert(is_instance(loader), "loader must be oop"); 4064 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4065 oop acl = loader; 4066 debug_only(jint loop_count = 0); 4067 // This loop taken verbatim from ClassLoader.java: 4068 do { 4069 acl = parent(acl); 4070 if (oopDesc::equals(cl, acl)) { 4071 return true; 4072 } 4073 assert(++loop_count > 0, "loop_count overflow"); 4074 } while (acl != NULL); 4075 return false; 4076 } 4077 4078 bool java_lang_ClassLoader::is_instance(oop obj) { 4079 return obj != NULL && is_subclass(obj->klass()); 4080 } 4081 4082 4083 // For class loader classes, parallelCapable defined 4084 // based on non-null field 4085 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4086 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4087 if (parallelCapable_offset == -1) { 4088 // Default for backward compatibility is false 4089 return false; 4090 } 4091 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4092 } 4093 4094 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4095 // Fix for 4474172; see evaluation for more details 4096 loader = non_reflection_class_loader(loader); 4097 4098 oop cl = SystemDictionary::java_system_loader(); 4099 while(cl != NULL) { 4100 if (oopDesc::equals(cl, loader)) return true; 4101 cl = parent(cl); 4102 } 4103 return false; 4104 } 4105 4106 // Return true if this is one of the class loaders associated with 4107 // the generated bytecodes for reflection. 4108 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4109 if (loader != NULL) { 4110 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4111 // This might be null in non-1.4 JDKs 4112 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4113 } 4114 return false; 4115 } 4116 4117 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4118 // See whether this is one of the class loaders associated with 4119 // the generated bytecodes for reflection, and if so, "magically" 4120 // delegate to its parent to prevent class loading from occurring 4121 // in places where applications using reflection didn't expect it. 4122 if (is_reflection_class_loader(loader)) { 4123 return parent(loader); 4124 } 4125 return loader; 4126 } 4127 4128 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4129 assert(is_instance(loader), "loader must be oop"); 4130 return loader->obj_field(unnamedModule_offset); 4131 } 4132 4133 // Support for java_lang_System 4134 // 4135 #define SYSTEM_FIELDS_DO(macro) \ 4136 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4137 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4138 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4139 macro(static_security_offset, k, "security", security_manager_signature, true) 4140 4141 void java_lang_System::compute_offsets() { 4142 InstanceKlass* k = SystemDictionary::System_klass(); 4143 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4144 } 4145 4146 #if INCLUDE_CDS 4147 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4148 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4149 } 4150 #endif 4151 4152 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4153 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4154 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4155 4156 4157 bool java_lang_System::has_security_manager() { 4158 InstanceKlass* ik = SystemDictionary::System_klass(); 4159 oop base = ik->static_field_base_raw(); 4160 return base->obj_field(static_security_offset) != NULL; 4161 } 4162 4163 int java_lang_Class::_klass_offset; 4164 int java_lang_Class::_array_klass_offset; 4165 int java_lang_Class::_oop_size_offset; 4166 int java_lang_Class::_static_oop_field_count_offset; 4167 int java_lang_Class::_class_loader_offset; 4168 int java_lang_Class::_module_offset; 4169 int java_lang_Class::_protection_domain_offset; 4170 int java_lang_Class::_component_mirror_offset; 4171 int java_lang_Class::_init_lock_offset; 4172 int java_lang_Class::_signers_offset; 4173 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4174 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4175 int java_lang_Throwable::backtrace_offset; 4176 int java_lang_Throwable::detailMessage_offset; 4177 int java_lang_Throwable::stackTrace_offset; 4178 int java_lang_Throwable::depth_offset; 4179 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4180 int java_lang_reflect_AccessibleObject::override_offset; 4181 int java_lang_reflect_Method::clazz_offset; 4182 int java_lang_reflect_Method::name_offset; 4183 int java_lang_reflect_Method::returnType_offset; 4184 int java_lang_reflect_Method::parameterTypes_offset; 4185 int java_lang_reflect_Method::exceptionTypes_offset; 4186 int java_lang_reflect_Method::slot_offset; 4187 int java_lang_reflect_Method::modifiers_offset; 4188 int java_lang_reflect_Method::signature_offset; 4189 int java_lang_reflect_Method::annotations_offset; 4190 int java_lang_reflect_Method::parameter_annotations_offset; 4191 int java_lang_reflect_Method::annotation_default_offset; 4192 int java_lang_reflect_Method::type_annotations_offset; 4193 int java_lang_reflect_Constructor::clazz_offset; 4194 int java_lang_reflect_Constructor::parameterTypes_offset; 4195 int java_lang_reflect_Constructor::exceptionTypes_offset; 4196 int java_lang_reflect_Constructor::slot_offset; 4197 int java_lang_reflect_Constructor::modifiers_offset; 4198 int java_lang_reflect_Constructor::signature_offset; 4199 int java_lang_reflect_Constructor::annotations_offset; 4200 int java_lang_reflect_Constructor::parameter_annotations_offset; 4201 int java_lang_reflect_Constructor::type_annotations_offset; 4202 int java_lang_reflect_Field::clazz_offset; 4203 int java_lang_reflect_Field::name_offset; 4204 int java_lang_reflect_Field::type_offset; 4205 int java_lang_reflect_Field::slot_offset; 4206 int java_lang_reflect_Field::modifiers_offset; 4207 int java_lang_reflect_Field::signature_offset; 4208 int java_lang_reflect_Field::annotations_offset; 4209 int java_lang_reflect_Field::type_annotations_offset; 4210 int java_lang_reflect_Parameter::name_offset; 4211 int java_lang_reflect_Parameter::modifiers_offset; 4212 int java_lang_reflect_Parameter::index_offset; 4213 int java_lang_reflect_Parameter::executable_offset; 4214 int java_lang_boxing_object::value_offset; 4215 int java_lang_boxing_object::long_value_offset; 4216 int java_lang_ref_Reference::referent_offset; 4217 int java_lang_ref_Reference::queue_offset; 4218 int java_lang_ref_Reference::next_offset; 4219 int java_lang_ref_Reference::discovered_offset; 4220 int java_lang_ref_SoftReference::timestamp_offset; 4221 int java_lang_ref_SoftReference::static_clock_offset; 4222 int java_lang_ClassLoader::parent_offset; 4223 int java_lang_System::static_in_offset; 4224 int java_lang_System::static_out_offset; 4225 int java_lang_System::static_err_offset; 4226 int java_lang_System::static_security_offset; 4227 int java_lang_StackTraceElement::methodName_offset; 4228 int java_lang_StackTraceElement::fileName_offset; 4229 int java_lang_StackTraceElement::lineNumber_offset; 4230 int java_lang_StackTraceElement::moduleName_offset; 4231 int java_lang_StackTraceElement::moduleVersion_offset; 4232 int java_lang_StackTraceElement::classLoaderName_offset; 4233 int java_lang_StackTraceElement::declaringClass_offset; 4234 int java_lang_StackTraceElement::declaringClassObject_offset; 4235 int java_lang_StackFrameInfo::_memberName_offset; 4236 int java_lang_StackFrameInfo::_bci_offset; 4237 int java_lang_StackFrameInfo::_version_offset; 4238 int java_lang_LiveStackFrameInfo::_monitors_offset; 4239 int java_lang_LiveStackFrameInfo::_locals_offset; 4240 int java_lang_LiveStackFrameInfo::_operands_offset; 4241 int java_lang_LiveStackFrameInfo::_mode_offset; 4242 int java_lang_AssertionStatusDirectives::classes_offset; 4243 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4244 int java_lang_AssertionStatusDirectives::packages_offset; 4245 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4246 int java_lang_AssertionStatusDirectives::deflt_offset; 4247 int java_nio_Buffer::_limit_offset; 4248 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4249 int reflect_ConstantPool::_oop_offset; 4250 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4251 4252 4253 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4254 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4255 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4256 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4257 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4258 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4259 macro(methodName_offset, k, "methodName", string_signature, false); \ 4260 macro(fileName_offset, k, "fileName", string_signature, false); \ 4261 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4262 4263 // Support for java_lang_StackTraceElement 4264 void java_lang_StackTraceElement::compute_offsets() { 4265 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4266 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4267 } 4268 4269 #if INCLUDE_CDS 4270 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4271 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4272 } 4273 #endif 4274 4275 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4276 element->obj_field_put(fileName_offset, value); 4277 } 4278 4279 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4280 element->obj_field_put(declaringClass_offset, value); 4281 } 4282 4283 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4284 element->obj_field_put(methodName_offset, value); 4285 } 4286 4287 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4288 element->int_field_put(lineNumber_offset, value); 4289 } 4290 4291 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4292 element->obj_field_put(moduleName_offset, value); 4293 } 4294 4295 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4296 element->obj_field_put(moduleVersion_offset, value); 4297 } 4298 4299 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4300 element->obj_field_put(classLoaderName_offset, value); 4301 } 4302 4303 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4304 element->obj_field_put(declaringClassObject_offset, value); 4305 } 4306 4307 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4308 element->short_field_put(_version_offset, value); 4309 } 4310 4311 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4312 element->int_field_put(_bci_offset, value); 4313 } 4314 4315 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4316 element->obj_field_put(_monitors_offset, value); 4317 } 4318 4319 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4320 element->obj_field_put(_locals_offset, value); 4321 } 4322 4323 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4324 element->obj_field_put(_operands_offset, value); 4325 } 4326 4327 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4328 element->int_field_put(_mode_offset, value); 4329 } 4330 4331 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4332 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4333 macro(classes_offset, k, "classes", string_array_signature, false); \ 4334 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4335 macro(packages_offset, k, "packages", string_array_signature, false); \ 4336 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4337 macro(deflt_offset, k, "deflt", bool_signature, false) 4338 4339 void java_lang_AssertionStatusDirectives::compute_offsets() { 4340 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4341 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4342 } 4343 4344 #if INCLUDE_CDS 4345 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4346 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4347 } 4348 #endif 4349 4350 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4351 o->obj_field_put(classes_offset, val); 4352 } 4353 4354 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4355 o->obj_field_put(classEnabled_offset, val); 4356 } 4357 4358 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4359 o->obj_field_put(packages_offset, val); 4360 } 4361 4362 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4363 o->obj_field_put(packageEnabled_offset, val); 4364 } 4365 4366 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4367 o->bool_field_put(deflt_offset, val); 4368 } 4369 4370 4371 // Support for intrinsification of java.nio.Buffer.checkIndex 4372 int java_nio_Buffer::limit_offset() { 4373 return _limit_offset; 4374 } 4375 4376 #define BUFFER_FIELDS_DO(macro) \ 4377 macro(_limit_offset, k, "limit", int_signature, false) 4378 4379 void java_nio_Buffer::compute_offsets() { 4380 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4381 assert(k != NULL, "must be loaded in 1.4+"); 4382 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4383 } 4384 4385 #if INCLUDE_CDS 4386 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4387 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4388 } 4389 #endif 4390 4391 #define AOS_FIELDS_DO(macro) \ 4392 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4393 4394 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4395 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4396 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4397 } 4398 4399 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4400 assert(_owner_offset != 0, "Must be initialized"); 4401 return obj->obj_field(_owner_offset); 4402 } 4403 4404 #if INCLUDE_CDS 4405 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4406 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4407 } 4408 #endif 4409 4410 static int member_offset(int hardcoded_offset) { 4411 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4412 } 4413 4414 // Compute hard-coded offsets 4415 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4416 // are not available to determine the offset_of_static_fields. 4417 void JavaClasses::compute_hard_coded_offsets() { 4418 4419 // java_lang_boxing_object 4420 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4421 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4422 4423 // java_lang_ref_Reference 4424 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4425 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4426 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4427 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4428 } 4429 4430 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4431 4432 // Compute non-hard-coded field offsets of all the classes in this file 4433 void JavaClasses::compute_offsets() { 4434 if (UseSharedSpaces) { 4435 return; // field offsets are loaded from archive 4436 } 4437 4438 // We have already called the compute_offsets() of the 4439 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4440 // earlier inside SystemDictionary::resolve_preloaded_classes() 4441 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4442 4443 // generated interpreter code wants to know about the offsets we just computed: 4444 AbstractAssembler::update_delayed_values(); 4445 } 4446 4447 #if INCLUDE_CDS 4448 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4449 4450 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4451 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4452 } 4453 #endif 4454 4455 4456 #ifndef PRODUCT 4457 4458 // These functions exist to assert the validity of hard-coded field offsets to guard 4459 // against changes in the class files 4460 4461 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4462 EXCEPTION_MARK; 4463 fieldDescriptor fd; 4464 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4465 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4466 InstanceKlass* ik = InstanceKlass::cast(k); 4467 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4468 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4469 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4470 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4471 return false; 4472 } 4473 if (fd.is_static()) { 4474 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4475 return false; 4476 } 4477 if (fd.offset() == hardcoded_offset ) { 4478 return true; 4479 } else { 4480 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4481 klass_name, field_name, hardcoded_offset, fd.offset()); 4482 return false; 4483 } 4484 } 4485 4486 // Check the hard-coded field offsets of all the classes in this file 4487 4488 void JavaClasses::check_offsets() { 4489 bool valid = true; 4490 4491 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4492 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4493 4494 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4495 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4496 4497 // Boxed primitive objects (java_lang_boxing_object) 4498 4499 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4500 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4501 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4502 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4503 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4504 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4505 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4506 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4507 4508 // java.lang.ref.Reference 4509 4510 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4511 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4512 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4513 // Fake field 4514 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4515 4516 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4517 } 4518 4519 #endif // PRODUCT 4520 4521 int InjectedField::compute_offset() { 4522 InstanceKlass* ik = InstanceKlass::cast(klass()); 4523 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4524 if (!may_be_java && !fs.access_flags().is_internal()) { 4525 // Only look at injected fields 4526 continue; 4527 } 4528 if (fs.name() == name() && fs.signature() == signature()) { 4529 return fs.offset(); 4530 } 4531 } 4532 ResourceMark rm; 4533 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)" : ""); 4534 #ifndef PRODUCT 4535 ik->print(); 4536 tty->print_cr("all fields:"); 4537 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4538 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4539 } 4540 #endif //PRODUCT 4541 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4542 return -1; 4543 } 4544 4545 void javaClasses_init() { 4546 JavaClasses::compute_offsets(); 4547 JavaClasses::check_offsets(); 4548 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4549 }