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.inline.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(const 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(const 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, const 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 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1217 // see more details in SystemDictionary::resolve_preloaded_classes(). 1218 if (!SystemDictionary::Class_klass_loaded()) { 1219 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 1220 fixup_mirror_list()->push(k); 1221 return true; 1222 } 1223 1224 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw_narrow()); 1225 1226 if (m == NULL) { 1227 return false; 1228 } 1229 1230 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1231 1232 // mirror is archived, restore 1233 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object"); 1234 Handle mirror(THREAD, m); 1235 1236 if (!k->is_array_klass()) { 1237 // - local static final fields with initial values were initialized at dump time 1238 1239 // create the init_lock 1240 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1241 set_init_lock(mirror(), r); 1242 1243 if (protection_domain.not_null()) { 1244 set_protection_domain(mirror(), protection_domain()); 1245 } 1246 } 1247 1248 assert(class_loader() == k->class_loader(), "should be same"); 1249 if (class_loader.not_null()) { 1250 set_class_loader(mirror(), class_loader()); 1251 } 1252 1253 k->set_java_mirror(mirror); 1254 k->clear_has_raw_archived_mirror(); 1255 1256 set_mirror_module_field(k, mirror, module, THREAD); 1257 1258 ResourceMark rm; 1259 log_trace(cds, heap, mirror)( 1260 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1261 1262 return true; 1263 } 1264 #endif // INCLUDE_CDS_JAVA_HEAP 1265 1266 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1267 assert(_module_offset != 0, "must have been computed already"); 1268 java_lang_Class::set_module(k->java_mirror(), module()); 1269 } 1270 1271 int java_lang_Class::oop_size(oop java_class) { 1272 assert(_oop_size_offset != 0, "must be set"); 1273 int size = java_class->int_field(_oop_size_offset); 1274 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1275 return size; 1276 } 1277 1278 int java_lang_Class::oop_size_raw(oop java_class) { 1279 assert(_oop_size_offset != 0, "must be set"); 1280 int size = java_class->int_field_raw(_oop_size_offset); 1281 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1282 return size; 1283 } 1284 1285 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) { 1286 assert(_oop_size_offset != 0, "must be set"); 1287 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1288 *(int*)(((char*)java_class) + _oop_size_offset) = size; 1289 } 1290 1291 int java_lang_Class::static_oop_field_count(oop java_class) { 1292 assert(_static_oop_field_count_offset != 0, "must be set"); 1293 return java_class->int_field(_static_oop_field_count_offset); 1294 } 1295 1296 int java_lang_Class::static_oop_field_count_raw(oop java_class) { 1297 assert(_static_oop_field_count_offset != 0, "must be set"); 1298 return java_class->int_field_raw(_static_oop_field_count_offset); 1299 } 1300 1301 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1302 assert(_static_oop_field_count_offset != 0, "must be set"); 1303 java_class->int_field_put(_static_oop_field_count_offset, size); 1304 } 1305 1306 oop java_lang_Class::protection_domain(oop java_class) { 1307 assert(_protection_domain_offset != 0, "must be set"); 1308 return java_class->obj_field(_protection_domain_offset); 1309 } 1310 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1311 assert(_protection_domain_offset != 0, "must be set"); 1312 java_class->obj_field_put(_protection_domain_offset, pd); 1313 } 1314 1315 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1316 assert(_component_mirror_offset != 0, "must be set"); 1317 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1318 } 1319 oop java_lang_Class::component_mirror(oop java_class) { 1320 assert(_component_mirror_offset != 0, "must be set"); 1321 return java_class->obj_field(_component_mirror_offset); 1322 } 1323 1324 oop java_lang_Class::init_lock(oop java_class) { 1325 assert(_init_lock_offset != 0, "must be set"); 1326 return java_class->obj_field(_init_lock_offset); 1327 } 1328 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1329 assert(_init_lock_offset != 0, "must be set"); 1330 java_class->obj_field_put(_init_lock_offset, init_lock); 1331 } 1332 1333 objArrayOop java_lang_Class::signers(oop java_class) { 1334 assert(_signers_offset != 0, "must be set"); 1335 return (objArrayOop)java_class->obj_field(_signers_offset); 1336 } 1337 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1338 assert(_signers_offset != 0, "must be set"); 1339 java_class->obj_field_put(_signers_offset, (oop)signers); 1340 } 1341 1342 1343 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1344 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1345 if (_class_loader_offset != 0) { 1346 java_class->obj_field_put(_class_loader_offset, loader); 1347 } 1348 } 1349 1350 oop java_lang_Class::class_loader(oop java_class) { 1351 assert(_class_loader_offset != 0, "must be set"); 1352 return java_class->obj_field(_class_loader_offset); 1353 } 1354 1355 oop java_lang_Class::module(oop java_class) { 1356 assert(_module_offset != 0, "must be set"); 1357 return java_class->obj_field(_module_offset); 1358 } 1359 1360 void java_lang_Class::set_module(oop java_class, oop module) { 1361 assert(_module_offset != 0, "must be set"); 1362 java_class->obj_field_put(_module_offset, module); 1363 } 1364 1365 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1366 // This should be improved by adding a field at the Java level or by 1367 // introducing a new VM klass (see comment in ClassFileParser) 1368 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1369 if (type != T_VOID) { 1370 Klass* aklass = Universe::typeArrayKlassObj(type); 1371 assert(aklass != NULL, "correct bootstrap"); 1372 release_set_array_klass(java_class, aklass); 1373 } 1374 #ifdef ASSERT 1375 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1376 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1377 #endif 1378 return java_class; 1379 } 1380 1381 1382 Klass* java_lang_Class::as_Klass(oop java_class) { 1383 //%note memory_2 1384 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1385 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1386 assert(k == NULL || k->is_klass(), "type check"); 1387 return k; 1388 } 1389 1390 Klass* java_lang_Class::as_Klass_raw(oop java_class) { 1391 //%note memory_2 1392 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1393 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset)); 1394 assert(k == NULL || k->is_klass(), "type check"); 1395 return k; 1396 } 1397 1398 1399 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1400 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1401 java_class->metadata_field_put(_klass_offset, klass); 1402 } 1403 1404 1405 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1406 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1407 Symbol* name = NULL; 1408 bool is_instance = false; 1409 if (is_primitive(java_class)) { 1410 name = vmSymbols::type_signature(primitive_type(java_class)); 1411 } else { 1412 Klass* k = as_Klass(java_class); 1413 is_instance = k->is_instance_klass(); 1414 name = k->name(); 1415 } 1416 if (name == NULL) { 1417 st->print("<null>"); 1418 return; 1419 } 1420 if (is_instance) st->print("L"); 1421 st->write((char*) name->base(), (int) name->utf8_length()); 1422 if (is_instance) st->print(";"); 1423 } 1424 1425 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1426 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1427 Symbol* name; 1428 if (is_primitive(java_class)) { 1429 name = vmSymbols::type_signature(primitive_type(java_class)); 1430 // Because this can create a new symbol, the caller has to decrement 1431 // the refcount, so make adjustment here and below for symbols returned 1432 // that are not created or incremented due to a successful lookup. 1433 name->increment_refcount(); 1434 } else { 1435 Klass* k = as_Klass(java_class); 1436 if (!k->is_instance_klass()) { 1437 name = k->name(); 1438 name->increment_refcount(); 1439 } else { 1440 ResourceMark rm; 1441 const char* sigstr = k->signature_name(); 1442 int siglen = (int) strlen(sigstr); 1443 if (!intern_if_not_found) { 1444 name = SymbolTable::probe(sigstr, siglen); 1445 } else { 1446 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1447 } 1448 } 1449 } 1450 return name; 1451 } 1452 1453 // Returns the Java name for this Java mirror (Resource allocated) 1454 // See Klass::external_name(). 1455 // For primitive type Java mirrors, its type name is returned. 1456 const char* java_lang_Class::as_external_name(oop java_class) { 1457 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1458 const char* name = NULL; 1459 if (is_primitive(java_class)) { 1460 name = type2name(primitive_type(java_class)); 1461 } else { 1462 name = as_Klass(java_class)->external_name(); 1463 } 1464 if (name == NULL) { 1465 name = "<null>"; 1466 } 1467 return name; 1468 } 1469 1470 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1471 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1472 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1473 return k; 1474 } 1475 1476 1477 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1478 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1479 java_class->release_metadata_field_put(_array_klass_offset, klass); 1480 } 1481 1482 1483 bool java_lang_Class::is_primitive(oop java_class) { 1484 // should assert: 1485 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1486 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1487 1488 #ifdef ASSERT 1489 if (is_primitive) { 1490 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1491 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1492 "Should be either the T_VOID primitive or a java primitive"); 1493 } 1494 #endif 1495 1496 return is_primitive; 1497 } 1498 1499 1500 BasicType java_lang_Class::primitive_type(oop java_class) { 1501 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1502 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1503 BasicType type = T_VOID; 1504 if (ak != NULL) { 1505 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1506 type = ArrayKlass::cast(ak)->element_type(); 1507 } else { 1508 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive"); 1509 } 1510 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent"); 1511 return type; 1512 } 1513 1514 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1515 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1516 if (is_primitive(java_class)) { 1517 if (reference_klass != NULL) 1518 (*reference_klass) = NULL; 1519 return primitive_type(java_class); 1520 } else { 1521 if (reference_klass != NULL) 1522 (*reference_klass) = as_Klass(java_class); 1523 return T_OBJECT; 1524 } 1525 } 1526 1527 1528 oop java_lang_Class::primitive_mirror(BasicType t) { 1529 oop mirror = Universe::java_mirror(t); 1530 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1531 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1532 return mirror; 1533 } 1534 1535 bool java_lang_Class::offsets_computed = false; 1536 int java_lang_Class::classRedefinedCount_offset = -1; 1537 1538 #define CLASS_FIELDS_DO(macro) \ 1539 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1540 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1541 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1542 macro(_module_offset, k, "module", module_signature, false) 1543 1544 void java_lang_Class::compute_offsets() { 1545 if (offsets_computed) { 1546 return; 1547 } 1548 1549 offsets_computed = true; 1550 1551 InstanceKlass* k = SystemDictionary::Class_klass(); 1552 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1553 1554 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1555 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1556 // GC treats them the same. 1557 _init_lock_offset = _component_mirror_offset; 1558 1559 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1560 } 1561 1562 #if INCLUDE_CDS 1563 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1564 f->do_u4((u4*)&offsets_computed); 1565 f->do_u4((u4*)&_init_lock_offset); 1566 1567 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1568 1569 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1570 } 1571 #endif 1572 1573 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1574 if (classRedefinedCount_offset == -1) { 1575 // If we don't have an offset for it then just return -1 as a marker. 1576 return -1; 1577 } 1578 1579 return the_class_mirror->int_field(classRedefinedCount_offset); 1580 } 1581 1582 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1583 if (classRedefinedCount_offset == -1) { 1584 // If we don't have an offset for it then nothing to set. 1585 return; 1586 } 1587 1588 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1589 } 1590 1591 1592 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1593 // platform thread structure, and a eetop offset which was used for thread 1594 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1595 // merged, so in the HotSpot VM we just use the eetop field for the thread 1596 // instead of the privateInfo_offset. 1597 // 1598 // Note: The stackSize field is only present starting in 1.4. 1599 1600 int java_lang_Thread::_name_offset = 0; 1601 int java_lang_Thread::_group_offset = 0; 1602 int java_lang_Thread::_contextClassLoader_offset = 0; 1603 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1604 int java_lang_Thread::_priority_offset = 0; 1605 int java_lang_Thread::_eetop_offset = 0; 1606 int java_lang_Thread::_daemon_offset = 0; 1607 int java_lang_Thread::_stillborn_offset = 0; 1608 int java_lang_Thread::_stackSize_offset = 0; 1609 int java_lang_Thread::_tid_offset = 0; 1610 int java_lang_Thread::_thread_status_offset = 0; 1611 int java_lang_Thread::_park_blocker_offset = 0; 1612 int java_lang_Thread::_park_event_offset = 0 ; 1613 1614 #define THREAD_FIELDS_DO(macro) \ 1615 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1616 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1617 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1618 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1619 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1620 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1621 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1622 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1623 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1624 macro(_tid_offset, k, "tid", long_signature, false); \ 1625 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1626 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1627 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1628 1629 void java_lang_Thread::compute_offsets() { 1630 assert(_group_offset == 0, "offsets should be initialized only once"); 1631 1632 InstanceKlass* k = SystemDictionary::Thread_klass(); 1633 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1634 } 1635 1636 #if INCLUDE_CDS 1637 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1638 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1639 } 1640 #endif 1641 1642 JavaThread* java_lang_Thread::thread(oop java_thread) { 1643 return (JavaThread*)java_thread->address_field(_eetop_offset); 1644 } 1645 1646 1647 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1648 java_thread->address_field_put(_eetop_offset, (address)thread); 1649 } 1650 1651 1652 oop java_lang_Thread::name(oop java_thread) { 1653 return java_thread->obj_field(_name_offset); 1654 } 1655 1656 1657 void java_lang_Thread::set_name(oop java_thread, oop name) { 1658 java_thread->obj_field_put(_name_offset, name); 1659 } 1660 1661 1662 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1663 return (ThreadPriority)java_thread->int_field(_priority_offset); 1664 } 1665 1666 1667 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1668 java_thread->int_field_put(_priority_offset, priority); 1669 } 1670 1671 1672 oop java_lang_Thread::threadGroup(oop java_thread) { 1673 return java_thread->obj_field(_group_offset); 1674 } 1675 1676 1677 bool java_lang_Thread::is_stillborn(oop java_thread) { 1678 return java_thread->bool_field(_stillborn_offset) != 0; 1679 } 1680 1681 1682 // We never have reason to turn the stillborn bit off 1683 void java_lang_Thread::set_stillborn(oop java_thread) { 1684 java_thread->bool_field_put(_stillborn_offset, true); 1685 } 1686 1687 1688 bool java_lang_Thread::is_alive(oop java_thread) { 1689 JavaThread* thr = java_lang_Thread::thread(java_thread); 1690 return (thr != NULL); 1691 } 1692 1693 1694 bool java_lang_Thread::is_daemon(oop java_thread) { 1695 return java_thread->bool_field(_daemon_offset) != 0; 1696 } 1697 1698 1699 void java_lang_Thread::set_daemon(oop java_thread) { 1700 java_thread->bool_field_put(_daemon_offset, true); 1701 } 1702 1703 oop java_lang_Thread::context_class_loader(oop java_thread) { 1704 return java_thread->obj_field(_contextClassLoader_offset); 1705 } 1706 1707 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1708 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1709 } 1710 1711 1712 jlong java_lang_Thread::stackSize(oop java_thread) { 1713 if (_stackSize_offset > 0) { 1714 return java_thread->long_field(_stackSize_offset); 1715 } else { 1716 return 0; 1717 } 1718 } 1719 1720 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1721 void java_lang_Thread::set_thread_status(oop java_thread, 1722 java_lang_Thread::ThreadStatus status) { 1723 // The threadStatus is only present starting in 1.5 1724 if (_thread_status_offset > 0) { 1725 java_thread->int_field_put(_thread_status_offset, status); 1726 } 1727 } 1728 1729 // Read thread status value from threadStatus field in java.lang.Thread java class. 1730 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1731 // Make sure the caller is operating on behalf of the VM or is 1732 // running VM code (state == _thread_in_vm). 1733 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1734 JavaThread::current()->thread_state() == _thread_in_vm, 1735 "Java Thread is not running in vm"); 1736 // The threadStatus is only present starting in 1.5 1737 if (_thread_status_offset > 0) { 1738 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1739 } else { 1740 // All we can easily figure out is if it is alive, but that is 1741 // enough info for a valid unknown status. 1742 // These aren't restricted to valid set ThreadStatus values, so 1743 // use JVMTI values and cast. 1744 JavaThread* thr = java_lang_Thread::thread(java_thread); 1745 if (thr == NULL) { 1746 // the thread hasn't run yet or is in the process of exiting 1747 return NEW; 1748 } 1749 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1750 } 1751 } 1752 1753 1754 jlong java_lang_Thread::thread_id(oop java_thread) { 1755 // The thread ID field is only present starting in 1.5 1756 if (_tid_offset > 0) { 1757 return java_thread->long_field(_tid_offset); 1758 } else { 1759 return 0; 1760 } 1761 } 1762 1763 oop java_lang_Thread::park_blocker(oop java_thread) { 1764 assert(JDK_Version::current().supports_thread_park_blocker() && 1765 _park_blocker_offset != 0, "Must support parkBlocker field"); 1766 1767 if (_park_blocker_offset > 0) { 1768 return java_thread->obj_field(_park_blocker_offset); 1769 } 1770 1771 return NULL; 1772 } 1773 1774 jlong java_lang_Thread::park_event(oop java_thread) { 1775 if (_park_event_offset > 0) { 1776 return java_thread->long_field(_park_event_offset); 1777 } 1778 return 0; 1779 } 1780 1781 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1782 if (_park_event_offset > 0) { 1783 java_thread->long_field_put(_park_event_offset, ptr); 1784 return true; 1785 } 1786 return false; 1787 } 1788 1789 1790 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1791 assert(_thread_status_offset != 0, "Must have thread status"); 1792 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1793 switch (status) { 1794 case NEW : return "NEW"; 1795 case RUNNABLE : return "RUNNABLE"; 1796 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1797 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1798 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1799 case PARKED : return "WAITING (parking)"; 1800 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1801 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1802 case TERMINATED : return "TERMINATED"; 1803 default : return "UNKNOWN"; 1804 }; 1805 } 1806 int java_lang_ThreadGroup::_parent_offset = 0; 1807 int java_lang_ThreadGroup::_name_offset = 0; 1808 int java_lang_ThreadGroup::_threads_offset = 0; 1809 int java_lang_ThreadGroup::_groups_offset = 0; 1810 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1811 int java_lang_ThreadGroup::_destroyed_offset = 0; 1812 int java_lang_ThreadGroup::_daemon_offset = 0; 1813 int java_lang_ThreadGroup::_nthreads_offset = 0; 1814 int java_lang_ThreadGroup::_ngroups_offset = 0; 1815 1816 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1817 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1818 return java_thread_group->obj_field(_parent_offset); 1819 } 1820 1821 // ("name as oop" accessor is not necessary) 1822 1823 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1824 oop name = java_thread_group->obj_field(_name_offset); 1825 // ThreadGroup.name can be null 1826 if (name != NULL) { 1827 return java_lang_String::as_utf8_string(name); 1828 } 1829 return NULL; 1830 } 1831 1832 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1833 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1834 return java_thread_group->int_field(_nthreads_offset); 1835 } 1836 1837 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1838 oop threads = java_thread_group->obj_field(_threads_offset); 1839 assert(threads != NULL, "threadgroups should have threads"); 1840 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1841 return objArrayOop(threads); 1842 } 1843 1844 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1845 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1846 return java_thread_group->int_field(_ngroups_offset); 1847 } 1848 1849 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1850 oop groups = java_thread_group->obj_field(_groups_offset); 1851 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1852 return objArrayOop(groups); 1853 } 1854 1855 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1856 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1857 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1858 } 1859 1860 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1861 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1862 return java_thread_group->bool_field(_destroyed_offset) != 0; 1863 } 1864 1865 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1866 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1867 return java_thread_group->bool_field(_daemon_offset) != 0; 1868 } 1869 1870 #define THREADGROUP_FIELDS_DO(macro) \ 1871 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1872 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1873 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1874 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1875 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1876 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1877 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1878 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1879 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1880 1881 void java_lang_ThreadGroup::compute_offsets() { 1882 assert(_parent_offset == 0, "offsets should be initialized only once"); 1883 1884 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1885 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1886 } 1887 1888 #if INCLUDE_CDS 1889 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1890 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1891 } 1892 #endif 1893 1894 #define THROWABLE_FIELDS_DO(macro) \ 1895 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1896 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1897 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1898 macro(depth_offset, k, "depth", int_signature, false); \ 1899 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1900 1901 void java_lang_Throwable::compute_offsets() { 1902 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1903 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1904 } 1905 1906 #if INCLUDE_CDS 1907 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 1908 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1909 } 1910 #endif 1911 1912 oop java_lang_Throwable::unassigned_stacktrace() { 1913 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1914 oop base = ik->static_field_base_raw(); 1915 return base->obj_field(static_unassigned_stacktrace_offset); 1916 } 1917 1918 oop java_lang_Throwable::backtrace(oop throwable) { 1919 return throwable->obj_field_acquire(backtrace_offset); 1920 } 1921 1922 1923 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1924 throwable->release_obj_field_put(backtrace_offset, value); 1925 } 1926 1927 int java_lang_Throwable::depth(oop throwable) { 1928 return throwable->int_field(depth_offset); 1929 } 1930 1931 void java_lang_Throwable::set_depth(oop throwable, int value) { 1932 throwable->int_field_put(depth_offset, value); 1933 } 1934 1935 oop java_lang_Throwable::message(oop throwable) { 1936 return throwable->obj_field(detailMessage_offset); 1937 } 1938 1939 1940 // Return Symbol for detailed_message or NULL 1941 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1942 PRESERVE_EXCEPTION_MARK; // Keep original exception 1943 oop detailed_message = java_lang_Throwable::message(throwable); 1944 if (detailed_message != NULL) { 1945 return java_lang_String::as_symbol(detailed_message, THREAD); 1946 } 1947 return NULL; 1948 } 1949 1950 void java_lang_Throwable::set_message(oop throwable, oop value) { 1951 throwable->obj_field_put(detailMessage_offset, value); 1952 } 1953 1954 1955 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1956 throwable->obj_field_put(stackTrace_offset, st_element_array); 1957 } 1958 1959 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1960 set_stacktrace(throwable, NULL); 1961 } 1962 1963 1964 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1965 ResourceMark rm; 1966 Klass* k = throwable->klass(); 1967 assert(k != NULL, "just checking"); 1968 st->print("%s", k->external_name()); 1969 oop msg = message(throwable); 1970 if (msg != NULL) { 1971 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1972 } 1973 } 1974 1975 // After this many redefines, the stack trace is unreliable. 1976 const int MAX_VERSION = USHRT_MAX; 1977 1978 static inline bool version_matches(Method* method, int version) { 1979 assert(version < MAX_VERSION, "version is too big"); 1980 return method != NULL && (method->constants()->version() == version); 1981 } 1982 1983 1984 // This class provides a simple wrapper over the internal structure of 1985 // exception backtrace to insulate users of the backtrace from needing 1986 // to know what it looks like. 1987 class BacktraceBuilder: public StackObj { 1988 friend class BacktraceIterator; 1989 private: 1990 Handle _backtrace; 1991 objArrayOop _head; 1992 typeArrayOop _methods; 1993 typeArrayOop _bcis; 1994 objArrayOop _mirrors; 1995 typeArrayOop _names; // needed to insulate method name against redefinition 1996 int _index; 1997 NoSafepointVerifier _nsv; 1998 1999 enum { 2000 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2001 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2002 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2003 trace_names_offset = java_lang_Throwable::trace_names_offset, 2004 trace_next_offset = java_lang_Throwable::trace_next_offset, 2005 trace_size = java_lang_Throwable::trace_size, 2006 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2007 }; 2008 2009 // get info out of chunks 2010 static typeArrayOop get_methods(objArrayHandle chunk) { 2011 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2012 assert(methods != NULL, "method array should be initialized in backtrace"); 2013 return methods; 2014 } 2015 static typeArrayOop get_bcis(objArrayHandle chunk) { 2016 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2017 assert(bcis != NULL, "bci array should be initialized in backtrace"); 2018 return bcis; 2019 } 2020 static objArrayOop get_mirrors(objArrayHandle chunk) { 2021 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2022 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 2023 return mirrors; 2024 } 2025 static typeArrayOop get_names(objArrayHandle chunk) { 2026 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2027 assert(names != NULL, "names array should be initialized in backtrace"); 2028 return names; 2029 } 2030 2031 public: 2032 2033 // constructor for new backtrace 2034 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) { 2035 expand(CHECK); 2036 _backtrace = Handle(THREAD, _head); 2037 _index = 0; 2038 } 2039 2040 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2041 _methods = get_methods(backtrace); 2042 _bcis = get_bcis(backtrace); 2043 _mirrors = get_mirrors(backtrace); 2044 _names = get_names(backtrace); 2045 assert(_methods->length() == _bcis->length() && 2046 _methods->length() == _mirrors->length() && 2047 _mirrors->length() == _names->length(), 2048 "method and source information arrays should match"); 2049 2050 // head is the preallocated backtrace 2051 _head = backtrace(); 2052 _backtrace = Handle(thread, _head); 2053 _index = 0; 2054 } 2055 2056 void expand(TRAPS) { 2057 objArrayHandle old_head(THREAD, _head); 2058 PauseNoSafepointVerifier pnsv(&_nsv); 2059 2060 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2061 objArrayHandle new_head(THREAD, head); 2062 2063 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2064 typeArrayHandle new_methods(THREAD, methods); 2065 2066 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2067 typeArrayHandle new_bcis(THREAD, bcis); 2068 2069 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2070 objArrayHandle new_mirrors(THREAD, mirrors); 2071 2072 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2073 typeArrayHandle new_names(THREAD, names); 2074 2075 if (!old_head.is_null()) { 2076 old_head->obj_at_put(trace_next_offset, new_head()); 2077 } 2078 new_head->obj_at_put(trace_methods_offset, new_methods()); 2079 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2080 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2081 new_head->obj_at_put(trace_names_offset, new_names()); 2082 2083 _head = new_head(); 2084 _methods = new_methods(); 2085 _bcis = new_bcis(); 2086 _mirrors = new_mirrors(); 2087 _names = new_names(); 2088 _index = 0; 2089 } 2090 2091 oop backtrace() { 2092 return _backtrace(); 2093 } 2094 2095 inline void push(Method* method, int bci, TRAPS) { 2096 // Smear the -1 bci to 0 since the array only holds unsigned 2097 // shorts. The later line number lookup would just smear the -1 2098 // to a 0 even if it could be recorded. 2099 if (bci == SynchronizationEntryBCI) bci = 0; 2100 2101 if (_index >= trace_chunk_size) { 2102 methodHandle mhandle(THREAD, method); 2103 expand(CHECK); 2104 method = mhandle(); 2105 } 2106 2107 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2108 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2109 2110 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2111 // klass owning the symbols alive so their refcounts aren't decremented. 2112 Symbol* name = method->name(); 2113 _names->symbol_at_put(_index, name); 2114 2115 // We need to save the mirrors in the backtrace to keep the class 2116 // from being unloaded while we still have this stack trace. 2117 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2118 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2119 _index++; 2120 } 2121 2122 }; 2123 2124 struct BacktraceElement : public StackObj { 2125 int _method_id; 2126 int _bci; 2127 int _version; 2128 Symbol* _name; 2129 Handle _mirror; 2130 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2131 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2132 }; 2133 2134 class BacktraceIterator : public StackObj { 2135 int _index; 2136 objArrayHandle _result; 2137 objArrayHandle _mirrors; 2138 typeArrayHandle _methods; 2139 typeArrayHandle _bcis; 2140 typeArrayHandle _names; 2141 2142 void init(objArrayHandle result, Thread* thread) { 2143 // Get method id, bci, version and mirror from chunk 2144 _result = result; 2145 if (_result.not_null()) { 2146 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2147 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2148 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2149 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2150 _index = 0; 2151 } 2152 } 2153 public: 2154 BacktraceIterator(objArrayHandle result, Thread* thread) { 2155 init(result, thread); 2156 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2157 } 2158 2159 BacktraceElement next(Thread* thread) { 2160 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2161 _methods->ushort_at(_index), 2162 Backtrace::version_at(_bcis->int_at(_index)), 2163 Backtrace::bci_at(_bcis->int_at(_index)), 2164 _names->symbol_at(_index)); 2165 _index++; 2166 2167 if (_index >= java_lang_Throwable::trace_chunk_size) { 2168 int next_offset = java_lang_Throwable::trace_next_offset; 2169 // Get next chunk 2170 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2171 init(result, thread); 2172 } 2173 return e; 2174 } 2175 2176 bool repeat() { 2177 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2178 } 2179 }; 2180 2181 2182 // Print stack trace element to resource allocated buffer 2183 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2184 int version, int bci, Symbol* name) { 2185 ResourceMark rm; 2186 2187 // Get strings and string lengths 2188 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2189 const char* klass_name = holder->external_name(); 2190 int buf_len = (int)strlen(klass_name); 2191 2192 char* method_name = name->as_C_string(); 2193 buf_len += (int)strlen(method_name); 2194 2195 char* source_file_name = NULL; 2196 Symbol* source = Backtrace::get_source_file_name(holder, version); 2197 if (source != NULL) { 2198 source_file_name = source->as_C_string(); 2199 buf_len += (int)strlen(source_file_name); 2200 } 2201 2202 char *module_name = NULL, *module_version = NULL; 2203 ModuleEntry* module = holder->module(); 2204 if (module->is_named()) { 2205 module_name = module->name()->as_C_string(); 2206 buf_len += (int)strlen(module_name); 2207 if (module->version() != NULL) { 2208 module_version = module->version()->as_C_string(); 2209 buf_len += (int)strlen(module_version); 2210 } 2211 } 2212 2213 // Allocate temporary buffer with extra space for formatting and line number 2214 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2215 2216 // Print stack trace line in buffer 2217 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2218 2219 // Print module information 2220 if (module_name != NULL) { 2221 if (module_version != NULL) { 2222 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2223 } else { 2224 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2225 } 2226 } 2227 2228 // The method can be NULL if the requested class version is gone 2229 Method* method = holder->method_with_orig_idnum(method_id, version); 2230 if (!version_matches(method, version)) { 2231 strcat(buf, "Redefined)"); 2232 } else { 2233 int line_number = Backtrace::get_line_number(method, bci); 2234 if (line_number == -2) { 2235 strcat(buf, "Native Method)"); 2236 } else { 2237 if (source_file_name != NULL && (line_number != -1)) { 2238 // Sourcename and linenumber 2239 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2240 } else if (source_file_name != NULL) { 2241 // Just sourcename 2242 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2243 } else { 2244 // Neither sourcename nor linenumber 2245 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2246 } 2247 CompiledMethod* nm = method->code(); 2248 if (WizardMode && nm != NULL) { 2249 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2250 } 2251 } 2252 } 2253 2254 st->print_cr("%s", buf); 2255 } 2256 2257 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2258 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2259 int method_id = method->orig_method_idnum(); 2260 int version = method->constants()->version(); 2261 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2262 } 2263 2264 /** 2265 * Print the throwable message and its stack trace plus all causes by walking the 2266 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2267 */ 2268 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2269 // First, print the message. 2270 print(throwable(), st); 2271 st->cr(); 2272 2273 // Now print the stack trace. 2274 Thread* THREAD = Thread::current(); 2275 while (throwable.not_null()) { 2276 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2277 if (result.is_null()) { 2278 st->print_raw_cr("\t<<no stack trace available>>"); 2279 return; 2280 } 2281 BacktraceIterator iter(result, THREAD); 2282 2283 while (iter.repeat()) { 2284 BacktraceElement bte = iter.next(THREAD); 2285 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2286 } 2287 { 2288 // Call getCause() which doesn't necessarily return the _cause field. 2289 EXCEPTION_MARK; 2290 JavaValue cause(T_OBJECT); 2291 JavaCalls::call_virtual(&cause, 2292 throwable, 2293 throwable->klass(), 2294 vmSymbols::getCause_name(), 2295 vmSymbols::void_throwable_signature(), 2296 THREAD); 2297 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2298 if (HAS_PENDING_EXCEPTION) { 2299 CLEAR_PENDING_EXCEPTION; 2300 throwable = Handle(); 2301 } else { 2302 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2303 if (throwable.not_null()) { 2304 st->print("Caused by: "); 2305 print(throwable(), st); 2306 st->cr(); 2307 } 2308 } 2309 } 2310 } 2311 } 2312 2313 /** 2314 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2315 */ 2316 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2317 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2318 JavaValue result(T_VOID); 2319 JavaCalls::call_virtual(&result, 2320 throwable, 2321 SystemDictionary::Throwable_klass(), 2322 vmSymbols::printStackTrace_name(), 2323 vmSymbols::void_method_signature(), 2324 THREAD); 2325 } 2326 2327 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2328 if (!StackTraceInThrowable) return; 2329 ResourceMark rm(THREAD); 2330 2331 // Start out by clearing the backtrace for this object, in case the VM 2332 // runs out of memory while allocating the stack trace 2333 set_backtrace(throwable(), NULL); 2334 // Clear lazily constructed Java level stacktrace if refilling occurs 2335 // This is unnecessary in 1.7+ but harmless 2336 clear_stacktrace(throwable()); 2337 2338 int max_depth = MaxJavaStackTraceDepth; 2339 JavaThread* thread = (JavaThread*)THREAD; 2340 2341 BacktraceBuilder bt(CHECK); 2342 2343 // If there is no Java frame just return the method that was being called 2344 // with bci 0 2345 if (!thread->has_last_Java_frame()) { 2346 if (max_depth >= 1 && method() != NULL) { 2347 bt.push(method(), 0, CHECK); 2348 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2349 set_depth(throwable(), 1); 2350 set_backtrace(throwable(), bt.backtrace()); 2351 } 2352 return; 2353 } 2354 2355 // Instead of using vframe directly, this version of fill_in_stack_trace 2356 // basically handles everything by hand. This significantly improved the 2357 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2358 // See bug 6333838 for more details. 2359 // The "ASSERT" here is to verify this method generates the exactly same stack 2360 // trace as utilizing vframe. 2361 #ifdef ASSERT 2362 vframeStream st(thread); 2363 methodHandle st_method(THREAD, st.method()); 2364 #endif 2365 int total_count = 0; 2366 RegisterMap map(thread, false); 2367 int decode_offset = 0; 2368 CompiledMethod* nm = NULL; 2369 bool skip_fillInStackTrace_check = false; 2370 bool skip_throwableInit_check = false; 2371 bool skip_hidden = !ShowHiddenFrames; 2372 2373 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2374 Method* method = NULL; 2375 int bci = 0; 2376 2377 // Compiled java method case. 2378 if (decode_offset != 0) { 2379 DebugInfoReadStream stream(nm, decode_offset); 2380 decode_offset = stream.read_int(); 2381 method = (Method*)nm->metadata_at(stream.read_int()); 2382 bci = stream.read_bci(); 2383 } else { 2384 if (fr.is_first_frame()) break; 2385 address pc = fr.pc(); 2386 if (fr.is_interpreted_frame()) { 2387 address bcp = fr.interpreter_frame_bcp(); 2388 method = fr.interpreter_frame_method(); 2389 bci = method->bci_from(bcp); 2390 fr = fr.sender(&map); 2391 } else { 2392 CodeBlob* cb = fr.cb(); 2393 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2394 // but non nmethod 2395 fr = fr.sender(&map); 2396 if (cb == NULL || !cb->is_compiled()) { 2397 continue; 2398 } 2399 nm = cb->as_compiled_method(); 2400 if (nm->method()->is_native()) { 2401 method = nm->method(); 2402 bci = 0; 2403 } else { 2404 PcDesc* pd = nm->pc_desc_at(pc); 2405 decode_offset = pd->scope_decode_offset(); 2406 // if decode_offset is not equal to 0, it will execute the 2407 // "compiled java method case" at the beginning of the loop. 2408 continue; 2409 } 2410 } 2411 } 2412 #ifdef ASSERT 2413 assert(st_method() == method && st.bci() == bci, 2414 "Wrong stack trace"); 2415 st.next(); 2416 // vframeStream::method isn't GC-safe so store off a copy 2417 // of the Method* in case we GC. 2418 if (!st.at_end()) { 2419 st_method = st.method(); 2420 } 2421 #endif 2422 2423 // the format of the stacktrace will be: 2424 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2425 // - 0 or more <init> methods for the exception class (skipped) 2426 // - rest of the stack 2427 2428 if (!skip_fillInStackTrace_check) { 2429 if (method->name() == vmSymbols::fillInStackTrace_name() && 2430 throwable->is_a(method->method_holder())) { 2431 continue; 2432 } 2433 else { 2434 skip_fillInStackTrace_check = true; // gone past them all 2435 } 2436 } 2437 if (!skip_throwableInit_check) { 2438 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2439 2440 // skip <init> methods of the exception class and superclasses 2441 // This is simlar to classic VM. 2442 if (method->name() == vmSymbols::object_initializer_name() && 2443 throwable->is_a(method->method_holder())) { 2444 continue; 2445 } else { 2446 // there are none or we've seen them all - either way stop checking 2447 skip_throwableInit_check = true; 2448 } 2449 } 2450 if (method->is_hidden()) { 2451 if (skip_hidden) continue; 2452 } 2453 bt.push(method, bci, CHECK); 2454 total_count++; 2455 } 2456 2457 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2458 2459 // Put completed stack trace into throwable object 2460 set_backtrace(throwable(), bt.backtrace()); 2461 set_depth(throwable(), total_count); 2462 } 2463 2464 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2465 // No-op if stack trace is disabled 2466 if (!StackTraceInThrowable) { 2467 return; 2468 } 2469 2470 // Disable stack traces for some preallocated out of memory errors 2471 if (!Universe::should_fill_in_stack_trace(throwable)) { 2472 return; 2473 } 2474 2475 PRESERVE_EXCEPTION_MARK; 2476 2477 JavaThread* thread = JavaThread::active(); 2478 fill_in_stack_trace(throwable, method, thread); 2479 // ignore exceptions thrown during stack trace filling 2480 CLEAR_PENDING_EXCEPTION; 2481 } 2482 2483 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2484 // Allocate stack trace - backtrace is created but not filled in 2485 2486 // No-op if stack trace is disabled 2487 if (!StackTraceInThrowable) return; 2488 BacktraceBuilder bt(CHECK); // creates a backtrace 2489 set_backtrace(throwable(), bt.backtrace()); 2490 } 2491 2492 2493 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2494 // Fill in stack trace into preallocated backtrace (no GC) 2495 2496 // No-op if stack trace is disabled 2497 if (!StackTraceInThrowable) return; 2498 2499 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2500 2501 JavaThread* THREAD = JavaThread::current(); 2502 2503 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2504 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2505 2506 ResourceMark rm(THREAD); 2507 vframeStream st(THREAD); 2508 2509 BacktraceBuilder bt(THREAD, backtrace); 2510 2511 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2512 // methods as preallocated errors aren't created by "java" code. 2513 2514 // fill in as much stack trace as possible 2515 int chunk_count = 0; 2516 for (;!st.at_end(); st.next()) { 2517 bt.push(st.method(), st.bci(), CHECK); 2518 chunk_count++; 2519 2520 // Bail-out for deep stacks 2521 if (chunk_count >= trace_chunk_size) break; 2522 } 2523 set_depth(throwable(), chunk_count); 2524 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2525 2526 // We support the Throwable immutability protocol defined for Java 7. 2527 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2528 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2529 } 2530 2531 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2532 objArrayHandle stack_trace_array_h, TRAPS) { 2533 2534 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2535 THROW(vmSymbols::java_lang_NullPointerException()); 2536 } 2537 2538 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2539 2540 if (stack_trace_array_h->length() != depth(throwable())) { 2541 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2542 } 2543 2544 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2545 BacktraceIterator iter(result, THREAD); 2546 2547 int index = 0; 2548 while (iter.repeat()) { 2549 BacktraceElement bte = iter.next(THREAD); 2550 2551 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2552 2553 if (stack_trace_element.is_null()) { 2554 THROW(vmSymbols::java_lang_NullPointerException()); 2555 } 2556 2557 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2558 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2559 2560 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2561 method, 2562 bte._version, 2563 bte._bci, 2564 bte._name, CHECK); 2565 } 2566 } 2567 2568 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2569 // Allocate java.lang.StackTraceElement instance 2570 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2571 assert(k != NULL, "must be loaded in 1.4+"); 2572 if (k->should_be_initialized()) { 2573 k->initialize(CHECK_0); 2574 } 2575 2576 Handle element = k->allocate_instance_handle(CHECK_0); 2577 2578 int version = method->constants()->version(); 2579 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2580 return element(); 2581 } 2582 2583 void java_lang_StackTraceElement::fill_in(Handle element, 2584 InstanceKlass* holder, const methodHandle& method, 2585 int version, int bci, Symbol* name, TRAPS) { 2586 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2587 2588 // Fill in class name 2589 ResourceMark rm(THREAD); 2590 const char* str = holder->external_name(); 2591 oop classname = StringTable::intern(str, CHECK); 2592 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2593 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2594 2595 oop loader = holder->class_loader(); 2596 if (loader != NULL) { 2597 oop loader_name = java_lang_ClassLoader::name(loader); 2598 if (loader_name != NULL) 2599 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2600 } 2601 2602 // Fill in method name 2603 oop methodname = StringTable::intern(name, CHECK); 2604 java_lang_StackTraceElement::set_methodName(element(), methodname); 2605 2606 // Fill in module name and version 2607 ModuleEntry* module = holder->module(); 2608 if (module->is_named()) { 2609 oop module_name = StringTable::intern(module->name(), CHECK); 2610 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2611 oop module_version; 2612 if (module->version() != NULL) { 2613 module_version = StringTable::intern(module->version(), CHECK); 2614 } else { 2615 module_version = NULL; 2616 } 2617 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2618 } 2619 2620 if (method() == NULL || !version_matches(method(), version)) { 2621 // The method was redefined, accurate line number information isn't available 2622 java_lang_StackTraceElement::set_fileName(element(), NULL); 2623 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2624 } else { 2625 // Fill in source file name and line number. 2626 Symbol* source = Backtrace::get_source_file_name(holder, version); 2627 if (ShowHiddenFrames && source == NULL) 2628 source = vmSymbols::unknown_class_name(); 2629 oop filename = StringTable::intern(source, CHECK); 2630 java_lang_StackTraceElement::set_fileName(element(), filename); 2631 2632 int line_number = Backtrace::get_line_number(method, bci); 2633 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2634 } 2635 } 2636 2637 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2638 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2639 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2640 // we should expand MemberName::name when Throwable uses StackTrace 2641 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2642 return method; 2643 } 2644 2645 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2646 // set Method* or mid/cpref 2647 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2648 InstanceKlass* ik = method->method_holder(); 2649 CallInfo info(method(), ik, CHECK); 2650 MethodHandles::init_method_MemberName(mname, info); 2651 // set bci 2652 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2653 // method may be redefined; store the version 2654 int version = method->constants()->version(); 2655 assert((jushort)version == version, "version should be short"); 2656 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2657 } 2658 2659 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2660 ResourceMark rm(THREAD); 2661 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2662 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2663 InstanceKlass* holder = InstanceKlass::cast(clazz); 2664 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2665 2666 short version = stackFrame->short_field(_version_offset); 2667 short bci = stackFrame->short_field(_bci_offset); 2668 Symbol* name = method->name(); 2669 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2670 } 2671 2672 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2673 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2674 macro(_bci_offset, k, "bci", short_signature, false) 2675 2676 void java_lang_StackFrameInfo::compute_offsets() { 2677 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2678 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2679 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2680 } 2681 2682 #if INCLUDE_CDS 2683 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 2684 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2685 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2686 } 2687 #endif 2688 2689 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2690 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2691 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2692 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2693 macro(_mode_offset, k, "mode", int_signature, false) 2694 2695 void java_lang_LiveStackFrameInfo::compute_offsets() { 2696 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2697 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2698 } 2699 2700 #if INCLUDE_CDS 2701 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 2702 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2703 } 2704 #endif 2705 2706 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2707 macro(override_offset, k, "override", bool_signature, false) 2708 2709 void java_lang_reflect_AccessibleObject::compute_offsets() { 2710 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2711 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2712 } 2713 2714 #if INCLUDE_CDS 2715 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 2716 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2717 } 2718 #endif 2719 2720 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2722 return (jboolean) reflect->bool_field(override_offset); 2723 } 2724 2725 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2727 reflect->bool_field_put(override_offset, (int) value); 2728 } 2729 2730 #define METHOD_FIELDS_DO(macro) \ 2731 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2732 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2733 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2734 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2735 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2736 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2737 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2738 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2739 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2740 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2741 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2742 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2743 2744 void java_lang_reflect_Method::compute_offsets() { 2745 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2746 // The generic signature and annotations fields are only present in 1.5 2747 signature_offset = -1; 2748 annotations_offset = -1; 2749 parameter_annotations_offset = -1; 2750 annotation_default_offset = -1; 2751 type_annotations_offset = -1; 2752 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2753 } 2754 2755 #if INCLUDE_CDS 2756 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 2757 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2758 } 2759 #endif 2760 2761 Handle java_lang_reflect_Method::create(TRAPS) { 2762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2763 Klass* klass = SystemDictionary::reflect_Method_klass(); 2764 // This class is eagerly initialized during VM initialization, since we keep a refence 2765 // to one of the methods 2766 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2767 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2768 } 2769 2770 oop java_lang_reflect_Method::clazz(oop reflect) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 return reflect->obj_field(clazz_offset); 2773 } 2774 2775 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 reflect->obj_field_put(clazz_offset, value); 2778 } 2779 2780 int java_lang_reflect_Method::slot(oop reflect) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 return reflect->int_field(slot_offset); 2783 } 2784 2785 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 reflect->int_field_put(slot_offset, value); 2788 } 2789 2790 oop java_lang_reflect_Method::name(oop method) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 return method->obj_field(name_offset); 2793 } 2794 2795 void java_lang_reflect_Method::set_name(oop method, oop value) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 method->obj_field_put(name_offset, value); 2798 } 2799 2800 oop java_lang_reflect_Method::return_type(oop method) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 return method->obj_field(returnType_offset); 2803 } 2804 2805 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 method->obj_field_put(returnType_offset, value); 2808 } 2809 2810 oop java_lang_reflect_Method::parameter_types(oop method) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 return method->obj_field(parameterTypes_offset); 2813 } 2814 2815 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2817 method->obj_field_put(parameterTypes_offset, value); 2818 } 2819 2820 oop java_lang_reflect_Method::exception_types(oop method) { 2821 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2822 return method->obj_field(exceptionTypes_offset); 2823 } 2824 2825 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2827 method->obj_field_put(exceptionTypes_offset, value); 2828 } 2829 2830 int java_lang_reflect_Method::modifiers(oop method) { 2831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2832 return method->int_field(modifiers_offset); 2833 } 2834 2835 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2837 method->int_field_put(modifiers_offset, value); 2838 } 2839 2840 bool java_lang_reflect_Method::has_signature_field() { 2841 return (signature_offset >= 0); 2842 } 2843 2844 oop java_lang_reflect_Method::signature(oop method) { 2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2846 assert(has_signature_field(), "signature field must be present"); 2847 return method->obj_field(signature_offset); 2848 } 2849 2850 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2852 assert(has_signature_field(), "signature field must be present"); 2853 method->obj_field_put(signature_offset, value); 2854 } 2855 2856 bool java_lang_reflect_Method::has_annotations_field() { 2857 return (annotations_offset >= 0); 2858 } 2859 2860 oop java_lang_reflect_Method::annotations(oop method) { 2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2862 assert(has_annotations_field(), "annotations field must be present"); 2863 return method->obj_field(annotations_offset); 2864 } 2865 2866 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2868 assert(has_annotations_field(), "annotations field must be present"); 2869 method->obj_field_put(annotations_offset, value); 2870 } 2871 2872 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2873 return (parameter_annotations_offset >= 0); 2874 } 2875 2876 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2878 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2879 return method->obj_field(parameter_annotations_offset); 2880 } 2881 2882 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2883 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2884 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2885 method->obj_field_put(parameter_annotations_offset, value); 2886 } 2887 2888 bool java_lang_reflect_Method::has_annotation_default_field() { 2889 return (annotation_default_offset >= 0); 2890 } 2891 2892 oop java_lang_reflect_Method::annotation_default(oop method) { 2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2894 assert(has_annotation_default_field(), "annotation default field must be present"); 2895 return method->obj_field(annotation_default_offset); 2896 } 2897 2898 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2900 assert(has_annotation_default_field(), "annotation default field must be present"); 2901 method->obj_field_put(annotation_default_offset, value); 2902 } 2903 2904 bool java_lang_reflect_Method::has_type_annotations_field() { 2905 return (type_annotations_offset >= 0); 2906 } 2907 2908 oop java_lang_reflect_Method::type_annotations(oop method) { 2909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2910 assert(has_type_annotations_field(), "type_annotations field must be present"); 2911 return method->obj_field(type_annotations_offset); 2912 } 2913 2914 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2916 assert(has_type_annotations_field(), "type_annotations field must be present"); 2917 method->obj_field_put(type_annotations_offset, value); 2918 } 2919 2920 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2921 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2922 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2923 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2924 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2925 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2926 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2927 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2928 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2929 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2930 2931 2932 void java_lang_reflect_Constructor::compute_offsets() { 2933 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2934 // The generic signature and annotations fields are only present in 1.5 2935 signature_offset = -1; 2936 annotations_offset = -1; 2937 parameter_annotations_offset = -1; 2938 type_annotations_offset = -1; 2939 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2940 } 2941 2942 #if INCLUDE_CDS 2943 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 2944 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2945 } 2946 #endif 2947 2948 Handle java_lang_reflect_Constructor::create(TRAPS) { 2949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2950 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2951 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2952 InstanceKlass* ik = InstanceKlass::cast(k); 2953 // Ensure it is initialized 2954 ik->initialize(CHECK_NH); 2955 return ik->allocate_instance_handle(THREAD); 2956 } 2957 2958 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2960 return reflect->obj_field(clazz_offset); 2961 } 2962 2963 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2965 reflect->obj_field_put(clazz_offset, value); 2966 } 2967 2968 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2969 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2970 return constructor->obj_field(parameterTypes_offset); 2971 } 2972 2973 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2975 constructor->obj_field_put(parameterTypes_offset, value); 2976 } 2977 2978 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2979 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2980 return constructor->obj_field(exceptionTypes_offset); 2981 } 2982 2983 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2985 constructor->obj_field_put(exceptionTypes_offset, value); 2986 } 2987 2988 int java_lang_reflect_Constructor::slot(oop reflect) { 2989 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2990 return reflect->int_field(slot_offset); 2991 } 2992 2993 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2994 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2995 reflect->int_field_put(slot_offset, value); 2996 } 2997 2998 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2999 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3000 return constructor->int_field(modifiers_offset); 3001 } 3002 3003 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3005 constructor->int_field_put(modifiers_offset, value); 3006 } 3007 3008 bool java_lang_reflect_Constructor::has_signature_field() { 3009 return (signature_offset >= 0); 3010 } 3011 3012 oop java_lang_reflect_Constructor::signature(oop constructor) { 3013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3014 assert(has_signature_field(), "signature field must be present"); 3015 return constructor->obj_field(signature_offset); 3016 } 3017 3018 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3020 assert(has_signature_field(), "signature field must be present"); 3021 constructor->obj_field_put(signature_offset, value); 3022 } 3023 3024 bool java_lang_reflect_Constructor::has_annotations_field() { 3025 return (annotations_offset >= 0); 3026 } 3027 3028 oop java_lang_reflect_Constructor::annotations(oop constructor) { 3029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3030 assert(has_annotations_field(), "annotations field must be present"); 3031 return constructor->obj_field(annotations_offset); 3032 } 3033 3034 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3036 assert(has_annotations_field(), "annotations field must be present"); 3037 constructor->obj_field_put(annotations_offset, value); 3038 } 3039 3040 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 3041 return (parameter_annotations_offset >= 0); 3042 } 3043 3044 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3046 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3047 return method->obj_field(parameter_annotations_offset); 3048 } 3049 3050 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3052 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3053 method->obj_field_put(parameter_annotations_offset, value); 3054 } 3055 3056 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3057 return (type_annotations_offset >= 0); 3058 } 3059 3060 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3062 assert(has_type_annotations_field(), "type_annotations field must be present"); 3063 return constructor->obj_field(type_annotations_offset); 3064 } 3065 3066 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3068 assert(has_type_annotations_field(), "type_annotations field must be present"); 3069 constructor->obj_field_put(type_annotations_offset, value); 3070 } 3071 3072 #define FIELD_FIELDS_DO(macro) \ 3073 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3074 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3075 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3076 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3077 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3078 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3079 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3080 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3081 3082 void java_lang_reflect_Field::compute_offsets() { 3083 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3084 // The generic signature and annotations fields are only present in 1.5 3085 signature_offset = -1; 3086 annotations_offset = -1; 3087 type_annotations_offset = -1; 3088 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3089 } 3090 3091 #if INCLUDE_CDS 3092 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3093 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3094 } 3095 #endif 3096 3097 Handle java_lang_reflect_Field::create(TRAPS) { 3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3099 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3100 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3101 InstanceKlass* ik = InstanceKlass::cast(k); 3102 // Ensure it is initialized 3103 ik->initialize(CHECK_NH); 3104 return ik->allocate_instance_handle(THREAD); 3105 } 3106 3107 oop java_lang_reflect_Field::clazz(oop reflect) { 3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3109 return reflect->obj_field(clazz_offset); 3110 } 3111 3112 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3113 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3114 reflect->obj_field_put(clazz_offset, value); 3115 } 3116 3117 oop java_lang_reflect_Field::name(oop field) { 3118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3119 return field->obj_field(name_offset); 3120 } 3121 3122 void java_lang_reflect_Field::set_name(oop field, oop value) { 3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3124 field->obj_field_put(name_offset, value); 3125 } 3126 3127 oop java_lang_reflect_Field::type(oop field) { 3128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3129 return field->obj_field(type_offset); 3130 } 3131 3132 void java_lang_reflect_Field::set_type(oop field, oop value) { 3133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3134 field->obj_field_put(type_offset, value); 3135 } 3136 3137 int java_lang_reflect_Field::slot(oop reflect) { 3138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3139 return reflect->int_field(slot_offset); 3140 } 3141 3142 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3143 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3144 reflect->int_field_put(slot_offset, value); 3145 } 3146 3147 int java_lang_reflect_Field::modifiers(oop field) { 3148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3149 return field->int_field(modifiers_offset); 3150 } 3151 3152 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3154 field->int_field_put(modifiers_offset, value); 3155 } 3156 3157 bool java_lang_reflect_Field::has_signature_field() { 3158 return (signature_offset >= 0); 3159 } 3160 3161 oop java_lang_reflect_Field::signature(oop field) { 3162 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3163 assert(has_signature_field(), "signature field must be present"); 3164 return field->obj_field(signature_offset); 3165 } 3166 3167 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3169 assert(has_signature_field(), "signature field must be present"); 3170 field->obj_field_put(signature_offset, value); 3171 } 3172 3173 bool java_lang_reflect_Field::has_annotations_field() { 3174 return (annotations_offset >= 0); 3175 } 3176 3177 oop java_lang_reflect_Field::annotations(oop field) { 3178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3179 assert(has_annotations_field(), "annotations field must be present"); 3180 return field->obj_field(annotations_offset); 3181 } 3182 3183 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3185 assert(has_annotations_field(), "annotations field must be present"); 3186 field->obj_field_put(annotations_offset, value); 3187 } 3188 3189 bool java_lang_reflect_Field::has_type_annotations_field() { 3190 return (type_annotations_offset >= 0); 3191 } 3192 3193 oop java_lang_reflect_Field::type_annotations(oop field) { 3194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3195 assert(has_type_annotations_field(), "type_annotations field must be present"); 3196 return field->obj_field(type_annotations_offset); 3197 } 3198 3199 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3201 assert(has_type_annotations_field(), "type_annotations field must be present"); 3202 field->obj_field_put(type_annotations_offset, value); 3203 } 3204 3205 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3206 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3207 3208 void reflect_ConstantPool::compute_offsets() { 3209 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3210 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3211 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3212 } 3213 3214 #if INCLUDE_CDS 3215 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3216 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3217 } 3218 #endif 3219 3220 #define PARAMETER_FIELDS_DO(macro) \ 3221 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3222 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3223 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3224 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3225 3226 void java_lang_reflect_Parameter::compute_offsets() { 3227 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3228 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3229 } 3230 3231 #if INCLUDE_CDS 3232 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3233 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3234 } 3235 #endif 3236 3237 Handle java_lang_reflect_Parameter::create(TRAPS) { 3238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3239 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3240 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3241 InstanceKlass* ik = InstanceKlass::cast(k); 3242 // Ensure it is initialized 3243 ik->initialize(CHECK_NH); 3244 return ik->allocate_instance_handle(THREAD); 3245 } 3246 3247 oop java_lang_reflect_Parameter::name(oop param) { 3248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3249 return param->obj_field(name_offset); 3250 } 3251 3252 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3254 param->obj_field_put(name_offset, value); 3255 } 3256 3257 int java_lang_reflect_Parameter::modifiers(oop param) { 3258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3259 return param->int_field(modifiers_offset); 3260 } 3261 3262 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3264 param->int_field_put(modifiers_offset, value); 3265 } 3266 3267 int java_lang_reflect_Parameter::index(oop param) { 3268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3269 return param->int_field(index_offset); 3270 } 3271 3272 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3274 param->int_field_put(index_offset, value); 3275 } 3276 3277 oop java_lang_reflect_Parameter::executable(oop param) { 3278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3279 return param->obj_field(executable_offset); 3280 } 3281 3282 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3284 param->obj_field_put(executable_offset, value); 3285 } 3286 3287 3288 int java_lang_Module::loader_offset; 3289 int java_lang_Module::name_offset; 3290 int java_lang_Module::_module_entry_offset = -1; 3291 3292 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3294 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(), 3295 vmSymbols::java_lang_module_init_signature(), 3296 loader, module_name, CHECK_NH); 3297 } 3298 3299 #define MODULE_FIELDS_DO(macro) \ 3300 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3301 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3302 3303 void java_lang_Module::compute_offsets() { 3304 InstanceKlass* k = SystemDictionary::Module_klass(); 3305 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3306 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3307 } 3308 3309 #if INCLUDE_CDS 3310 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3311 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3312 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3313 } 3314 #endif 3315 3316 oop java_lang_Module::loader(oop module) { 3317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3318 return module->obj_field(loader_offset); 3319 } 3320 3321 void java_lang_Module::set_loader(oop module, oop value) { 3322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3323 module->obj_field_put(loader_offset, value); 3324 } 3325 3326 oop java_lang_Module::name(oop module) { 3327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3328 return module->obj_field(name_offset); 3329 } 3330 3331 void java_lang_Module::set_name(oop module, oop value) { 3332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3333 module->obj_field_put(name_offset, value); 3334 } 3335 3336 ModuleEntry* java_lang_Module::module_entry(oop module) { 3337 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3338 assert(module != NULL, "module can't be null"); 3339 assert(oopDesc::is_oop(module), "module must be oop"); 3340 3341 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3342 if (module_entry == NULL) { 3343 // If the inject field containing the ModuleEntry* is null then return the 3344 // class loader's unnamed module. 3345 oop loader = java_lang_Module::loader(module); 3346 Handle h_loader = Handle(Thread::current(), loader); 3347 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3348 return loader_cld->unnamed_module(); 3349 } 3350 return module_entry; 3351 } 3352 3353 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3354 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3355 assert(module != NULL, "module can't be null"); 3356 assert(oopDesc::is_oop(module), "module must be oop"); 3357 module->address_field_put(_module_entry_offset, (address)module_entry); 3358 } 3359 3360 Handle reflect_ConstantPool::create(TRAPS) { 3361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3362 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3363 // Ensure it is initialized 3364 k->initialize(CHECK_NH); 3365 return k->allocate_instance_handle(THREAD); 3366 } 3367 3368 3369 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3371 oop mirror = value->pool_holder()->java_mirror(); 3372 // Save the mirror to get back the constant pool. 3373 reflect->obj_field_put(_oop_offset, mirror); 3374 } 3375 3376 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3378 3379 oop mirror = reflect->obj_field(_oop_offset); 3380 Klass* k = java_lang_Class::as_Klass(mirror); 3381 assert(k->is_instance_klass(), "Must be"); 3382 3383 // Get the constant pool back from the klass. Since class redefinition 3384 // merges the new constant pool into the old, this is essentially the 3385 // same constant pool as the original. If constant pool merging is 3386 // no longer done in the future, this will have to change to save 3387 // the original. 3388 return InstanceKlass::cast(k)->constants(); 3389 } 3390 3391 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3392 macro(_base_offset, k, "base", object_signature, false) 3393 3394 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3395 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3396 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3397 } 3398 3399 #if INCLUDE_CDS 3400 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) { 3401 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3402 } 3403 #endif 3404 3405 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3406 Klass* k = SystemDictionary::box_klass(type); 3407 if (k == NULL) return NULL; 3408 InstanceKlass* ik = InstanceKlass::cast(k); 3409 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3410 return ik->allocate_instance(THREAD); 3411 } 3412 3413 3414 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3415 oop box = initialize_and_allocate(type, CHECK_0); 3416 if (box == NULL) return NULL; 3417 switch (type) { 3418 case T_BOOLEAN: 3419 box->bool_field_put(value_offset, value->z); 3420 break; 3421 case T_CHAR: 3422 box->char_field_put(value_offset, value->c); 3423 break; 3424 case T_FLOAT: 3425 box->float_field_put(value_offset, value->f); 3426 break; 3427 case T_DOUBLE: 3428 box->double_field_put(long_value_offset, value->d); 3429 break; 3430 case T_BYTE: 3431 box->byte_field_put(value_offset, value->b); 3432 break; 3433 case T_SHORT: 3434 box->short_field_put(value_offset, value->s); 3435 break; 3436 case T_INT: 3437 box->int_field_put(value_offset, value->i); 3438 break; 3439 case T_LONG: 3440 box->long_field_put(long_value_offset, value->j); 3441 break; 3442 default: 3443 return NULL; 3444 } 3445 return box; 3446 } 3447 3448 3449 BasicType java_lang_boxing_object::basic_type(oop box) { 3450 if (box == NULL) return T_ILLEGAL; 3451 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3452 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3453 return T_ILLEGAL; 3454 return type; 3455 } 3456 3457 3458 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3459 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3460 switch (type) { 3461 case T_BOOLEAN: 3462 value->z = box->bool_field(value_offset); 3463 break; 3464 case T_CHAR: 3465 value->c = box->char_field(value_offset); 3466 break; 3467 case T_FLOAT: 3468 value->f = box->float_field(value_offset); 3469 break; 3470 case T_DOUBLE: 3471 value->d = box->double_field(long_value_offset); 3472 break; 3473 case T_BYTE: 3474 value->b = box->byte_field(value_offset); 3475 break; 3476 case T_SHORT: 3477 value->s = box->short_field(value_offset); 3478 break; 3479 case T_INT: 3480 value->i = box->int_field(value_offset); 3481 break; 3482 case T_LONG: 3483 value->j = box->long_field(long_value_offset); 3484 break; 3485 default: 3486 return T_ILLEGAL; 3487 } // end switch 3488 return type; 3489 } 3490 3491 3492 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3493 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3494 switch (type) { 3495 case T_BOOLEAN: 3496 box->bool_field_put(value_offset, value->z); 3497 break; 3498 case T_CHAR: 3499 box->char_field_put(value_offset, value->c); 3500 break; 3501 case T_FLOAT: 3502 box->float_field_put(value_offset, value->f); 3503 break; 3504 case T_DOUBLE: 3505 box->double_field_put(long_value_offset, value->d); 3506 break; 3507 case T_BYTE: 3508 box->byte_field_put(value_offset, value->b); 3509 break; 3510 case T_SHORT: 3511 box->short_field_put(value_offset, value->s); 3512 break; 3513 case T_INT: 3514 box->int_field_put(value_offset, value->i); 3515 break; 3516 case T_LONG: 3517 box->long_field_put(long_value_offset, value->j); 3518 break; 3519 default: 3520 return T_ILLEGAL; 3521 } // end switch 3522 return type; 3523 } 3524 3525 3526 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3527 switch (type) { 3528 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3529 case T_CHAR: st->print("%d", value->c); break; 3530 case T_BYTE: st->print("%d", value->b); break; 3531 case T_SHORT: st->print("%d", value->s); break; 3532 case T_INT: st->print("%d", value->i); break; 3533 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3534 case T_FLOAT: st->print("%f", value->f); break; 3535 case T_DOUBLE: st->print("%lf", value->d); break; 3536 default: st->print("type %d?", type); break; 3537 } 3538 } 3539 3540 // Support for java_lang_ref_Reference 3541 3542 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3543 assert(obj != NULL, "sanity"); 3544 if (offset != java_lang_ref_Reference::referent_offset) { 3545 return false; 3546 } 3547 3548 Klass* k = obj->klass(); 3549 if (!k->is_instance_klass()) { 3550 return false; 3551 } 3552 3553 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3554 bool is_reference = ik->reference_type() != REF_NONE; 3555 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3556 return is_reference; 3557 } 3558 3559 // Support for java_lang_ref_SoftReference 3560 // 3561 3562 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3563 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3564 macro(static_clock_offset, k, "clock", long_signature, true) 3565 3566 void java_lang_ref_SoftReference::compute_offsets() { 3567 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3568 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3569 } 3570 3571 #if INCLUDE_CDS 3572 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3573 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3574 } 3575 #endif 3576 3577 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3578 return ref->long_field(timestamp_offset); 3579 } 3580 3581 jlong java_lang_ref_SoftReference::clock() { 3582 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3583 oop base = ik->static_field_base_raw(); 3584 return base->long_field(static_clock_offset); 3585 } 3586 3587 void java_lang_ref_SoftReference::set_clock(jlong value) { 3588 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3589 oop base = ik->static_field_base_raw(); 3590 base->long_field_put(static_clock_offset, value); 3591 } 3592 3593 // Support for java_lang_invoke_DirectMethodHandle 3594 3595 int java_lang_invoke_DirectMethodHandle::_member_offset; 3596 3597 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3598 oop member_name = NULL; 3599 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3600 "a DirectMethodHandle oop is expected"); 3601 return dmh->obj_field(member_offset_in_bytes()); 3602 } 3603 3604 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3605 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3606 3607 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3608 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3609 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3610 } 3611 3612 #if INCLUDE_CDS 3613 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 3614 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3615 } 3616 #endif 3617 3618 // Support for java_lang_invoke_MethodHandle 3619 3620 int java_lang_invoke_MethodHandle::_type_offset; 3621 int java_lang_invoke_MethodHandle::_form_offset; 3622 3623 int java_lang_invoke_MemberName::_clazz_offset; 3624 int java_lang_invoke_MemberName::_name_offset; 3625 int java_lang_invoke_MemberName::_type_offset; 3626 int java_lang_invoke_MemberName::_flags_offset; 3627 int java_lang_invoke_MemberName::_method_offset; 3628 int java_lang_invoke_MemberName::_vmindex_offset; 3629 3630 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3631 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3632 3633 int java_lang_invoke_LambdaForm::_vmentry_offset; 3634 3635 #define METHODHANDLE_FIELDS_DO(macro) \ 3636 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3637 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3638 3639 void java_lang_invoke_MethodHandle::compute_offsets() { 3640 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3641 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3642 } 3643 3644 #if INCLUDE_CDS 3645 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 3646 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3647 } 3648 #endif 3649 3650 #define MEMBERNAME_FIELDS_DO(macro) \ 3651 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3652 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3653 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3654 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3655 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3656 3657 void java_lang_invoke_MemberName::compute_offsets() { 3658 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3659 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3660 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3661 } 3662 3663 #if INCLUDE_CDS 3664 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 3665 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3666 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3667 } 3668 #endif 3669 3670 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3671 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3672 assert(k != NULL, "jdk mismatch"); 3673 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3674 } 3675 3676 #if INCLUDE_CDS 3677 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 3678 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3679 } 3680 #endif 3681 3682 #define LAMBDAFORM_FIELDS_DO(macro) \ 3683 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3684 3685 void java_lang_invoke_LambdaForm::compute_offsets() { 3686 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3687 assert (k != NULL, "jdk mismatch"); 3688 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3689 } 3690 3691 #if INCLUDE_CDS 3692 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 3693 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3694 } 3695 #endif 3696 3697 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3698 return obj != NULL && is_subclass(obj->klass()); 3699 } 3700 3701 3702 oop java_lang_invoke_MethodHandle::type(oop mh) { 3703 return mh->obj_field(_type_offset); 3704 } 3705 3706 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3707 mh->obj_field_put(_type_offset, mtype); 3708 } 3709 3710 oop java_lang_invoke_MethodHandle::form(oop mh) { 3711 assert(_form_offset != 0, ""); 3712 return mh->obj_field(_form_offset); 3713 } 3714 3715 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3716 assert(_form_offset != 0, ""); 3717 mh->obj_field_put(_form_offset, lform); 3718 } 3719 3720 /// MemberName accessors 3721 3722 oop java_lang_invoke_MemberName::clazz(oop mname) { 3723 assert(is_instance(mname), "wrong type"); 3724 return mname->obj_field(_clazz_offset); 3725 } 3726 3727 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3728 assert(is_instance(mname), "wrong type"); 3729 mname->obj_field_put(_clazz_offset, clazz); 3730 } 3731 3732 oop java_lang_invoke_MemberName::name(oop mname) { 3733 assert(is_instance(mname), "wrong type"); 3734 return mname->obj_field(_name_offset); 3735 } 3736 3737 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3738 assert(is_instance(mname), "wrong type"); 3739 mname->obj_field_put(_name_offset, name); 3740 } 3741 3742 oop java_lang_invoke_MemberName::type(oop mname) { 3743 assert(is_instance(mname), "wrong type"); 3744 return mname->obj_field(_type_offset); 3745 } 3746 3747 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3748 assert(is_instance(mname), "wrong type"); 3749 mname->obj_field_put(_type_offset, type); 3750 } 3751 3752 int java_lang_invoke_MemberName::flags(oop mname) { 3753 assert(is_instance(mname), "wrong type"); 3754 return mname->int_field(_flags_offset); 3755 } 3756 3757 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3758 assert(is_instance(mname), "wrong type"); 3759 mname->int_field_put(_flags_offset, flags); 3760 } 3761 3762 3763 // Return vmtarget from ResolvedMethodName method field through indirection 3764 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3765 assert(is_instance(mname), "wrong type"); 3766 oop method = mname->obj_field(_method_offset); 3767 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3768 } 3769 3770 bool java_lang_invoke_MemberName::is_method(oop mname) { 3771 assert(is_instance(mname), "must be MemberName"); 3772 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3773 } 3774 3775 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3776 assert(is_instance(mname), "wrong type"); 3777 mname->obj_field_put(_method_offset, resolved_method); 3778 } 3779 3780 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3781 assert(is_instance(mname), "wrong type"); 3782 return (intptr_t) mname->address_field(_vmindex_offset); 3783 } 3784 3785 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3786 assert(is_instance(mname), "wrong type"); 3787 mname->address_field_put(_vmindex_offset, (address) index); 3788 } 3789 3790 3791 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3792 assert(is_instance(resolved_method), "wrong type"); 3793 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3794 assert(m->is_method(), "must be"); 3795 return m; 3796 } 3797 3798 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3799 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3800 assert(is_instance(resolved_method), "wrong type"); 3801 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3802 } 3803 3804 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3805 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3806 oop resolved_method = ResolvedMethodTable::find_method(m()); 3807 if (resolved_method == NULL) { 3808 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3809 if (!k->is_initialized()) { 3810 k->initialize(CHECK_NULL); 3811 } 3812 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3813 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3814 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have 3815 // distinct loaders) to ensure the metadata is kept alive. 3816 // This mirror may be different than the one in clazz field. 3817 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3818 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3819 } 3820 return resolved_method; 3821 } 3822 3823 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3824 assert(is_instance(lform), "wrong type"); 3825 return lform->obj_field(_vmentry_offset); 3826 } 3827 3828 3829 // Support for java_lang_invoke_MethodType 3830 3831 int java_lang_invoke_MethodType::_rtype_offset; 3832 int java_lang_invoke_MethodType::_ptypes_offset; 3833 3834 #define METHODTYPE_FIELDS_DO(macro) \ 3835 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3836 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3837 3838 void java_lang_invoke_MethodType::compute_offsets() { 3839 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3840 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3841 } 3842 3843 #if INCLUDE_CDS 3844 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 3845 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3846 } 3847 #endif 3848 3849 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3850 st->print("("); 3851 objArrayOop pts = ptypes(mt); 3852 for (int i = 0, limit = pts->length(); i < limit; i++) { 3853 java_lang_Class::print_signature(pts->obj_at(i), st); 3854 } 3855 st->print(")"); 3856 java_lang_Class::print_signature(rtype(mt), st); 3857 } 3858 3859 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3860 ResourceMark rm; 3861 stringStream buffer(128); 3862 print_signature(mt, &buffer); 3863 const char* sigstr = buffer.base(); 3864 int siglen = (int) buffer.size(); 3865 Symbol *name; 3866 if (!intern_if_not_found) { 3867 name = SymbolTable::probe(sigstr, siglen); 3868 } else { 3869 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3870 } 3871 return name; 3872 } 3873 3874 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3875 if (oopDesc::equals(mt1, mt2)) 3876 return true; 3877 if (!oopDesc::equals(rtype(mt1), rtype(mt2))) 3878 return false; 3879 if (ptype_count(mt1) != ptype_count(mt2)) 3880 return false; 3881 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3882 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i))) 3883 return false; 3884 } 3885 return true; 3886 } 3887 3888 oop java_lang_invoke_MethodType::rtype(oop mt) { 3889 assert(is_instance(mt), "must be a MethodType"); 3890 return mt->obj_field(_rtype_offset); 3891 } 3892 3893 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3894 assert(is_instance(mt), "must be a MethodType"); 3895 return (objArrayOop) mt->obj_field(_ptypes_offset); 3896 } 3897 3898 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3899 return ptypes(mt)->obj_at(idx); 3900 } 3901 3902 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3903 return ptypes(mt)->length(); 3904 } 3905 3906 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3907 objArrayOop pts = ptypes(mt); 3908 int count = pts->length(); 3909 int slots = 0; 3910 for (int i = 0; i < count; i++) { 3911 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3912 slots += type2size[bt]; 3913 } 3914 return slots; 3915 } 3916 3917 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3918 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3919 return type2size[bt]; 3920 } 3921 3922 3923 // Support for java_lang_invoke_CallSite 3924 3925 int java_lang_invoke_CallSite::_target_offset; 3926 int java_lang_invoke_CallSite::_context_offset; 3927 3928 #define CALLSITE_FIELDS_DO(macro) \ 3929 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3930 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3931 3932 void java_lang_invoke_CallSite::compute_offsets() { 3933 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3934 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3935 } 3936 3937 #if INCLUDE_CDS 3938 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 3939 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3940 } 3941 #endif 3942 3943 oop java_lang_invoke_CallSite::context(oop call_site) { 3944 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3945 3946 oop dep_oop = call_site->obj_field(_context_offset); 3947 return dep_oop; 3948 } 3949 3950 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3951 3952 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3953 3954 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3955 InstanceKlass* k = SystemDictionary::Context_klass(); 3956 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3957 } 3958 3959 #if INCLUDE_CDS 3960 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 3961 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3962 } 3963 #endif 3964 3965 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3966 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3967 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3968 DependencyContext dep_ctx(vmdeps_addr); 3969 return dep_ctx; 3970 } 3971 3972 // Support for java_security_AccessControlContext 3973 3974 int java_security_AccessControlContext::_context_offset = 0; 3975 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3976 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3977 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3978 3979 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3980 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3981 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3982 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3983 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3984 3985 void java_security_AccessControlContext::compute_offsets() { 3986 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3987 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3988 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3989 } 3990 3991 #if INCLUDE_CDS 3992 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 3993 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3994 } 3995 #endif 3996 3997 bool java_security_AccessControlContext::is_authorized(Handle context) { 3998 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3999 assert(_isAuthorized_offset != -1, "should be set"); 4000 return context->bool_field(_isAuthorized_offset) != 0; 4001 } 4002 4003 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4004 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4005 // Ensure klass is initialized 4006 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 4007 // Allocate result 4008 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 4009 // Fill in values 4010 result->obj_field_put(_context_offset, context()); 4011 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4012 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4013 // whitelist AccessControlContexts created by the JVM if present 4014 if (_isAuthorized_offset != -1) { 4015 result->bool_field_put(_isAuthorized_offset, true); 4016 } 4017 return result; 4018 } 4019 4020 4021 // Support for java_lang_ClassLoader 4022 4023 bool java_lang_ClassLoader::offsets_computed = false; 4024 int java_lang_ClassLoader::_loader_data_offset = -1; 4025 int java_lang_ClassLoader::parallelCapable_offset = -1; 4026 int java_lang_ClassLoader::name_offset = -1; 4027 int java_lang_ClassLoader::nameAndId_offset = -1; 4028 int java_lang_ClassLoader::unnamedModule_offset = -1; 4029 4030 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4031 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4032 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset); 4033 } 4034 4035 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) { 4036 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4037 return RawAccess<>::load_at(loader, _loader_data_offset); 4038 } 4039 4040 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4041 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 4042 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data); 4043 } 4044 4045 #define CLASSLOADER_FIELDS_DO(macro) \ 4046 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4047 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4048 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4049 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4050 macro(parent_offset, k1, "parent", classloader_signature, false) 4051 4052 void java_lang_ClassLoader::compute_offsets() { 4053 assert(!offsets_computed, "offsets should be initialized only once"); 4054 offsets_computed = true; 4055 4056 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4057 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4058 4059 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4060 } 4061 4062 #if INCLUDE_CDS 4063 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4064 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4065 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4066 } 4067 #endif 4068 4069 oop java_lang_ClassLoader::parent(oop loader) { 4070 assert(is_instance(loader), "loader must be oop"); 4071 return loader->obj_field(parent_offset); 4072 } 4073 4074 // Returns the name field of this class loader. If the name field has not 4075 // been set, null will be returned. 4076 oop java_lang_ClassLoader::name(oop loader) { 4077 assert(is_instance(loader), "loader must be oop"); 4078 return loader->obj_field(name_offset); 4079 } 4080 4081 // Returns the nameAndId field of this class loader. The format is 4082 // as follows: 4083 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4084 // If the defining loader has no name then <qualified-class-name> @<id> 4085 // If built-in loader, then omit '@<id>' as there is only one instance. 4086 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4087 oop java_lang_ClassLoader::nameAndId(oop loader) { 4088 assert(is_instance(loader), "loader must be oop"); 4089 return loader->obj_field(nameAndId_offset); 4090 } 4091 4092 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4093 assert(is_instance(loader), "loader must be oop"); 4094 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4095 oop acl = loader; 4096 debug_only(jint loop_count = 0); 4097 // This loop taken verbatim from ClassLoader.java: 4098 do { 4099 acl = parent(acl); 4100 if (oopDesc::equals(cl, acl)) { 4101 return true; 4102 } 4103 assert(++loop_count > 0, "loop_count overflow"); 4104 } while (acl != NULL); 4105 return false; 4106 } 4107 4108 bool java_lang_ClassLoader::is_instance(oop obj) { 4109 return obj != NULL && is_subclass(obj->klass()); 4110 } 4111 4112 4113 // For class loader classes, parallelCapable defined 4114 // based on non-null field 4115 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4116 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4117 if (parallelCapable_offset == -1) { 4118 // Default for backward compatibility is false 4119 return false; 4120 } 4121 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4122 } 4123 4124 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4125 // Fix for 4474172; see evaluation for more details 4126 loader = non_reflection_class_loader(loader); 4127 4128 oop cl = SystemDictionary::java_system_loader(); 4129 while(cl != NULL) { 4130 if (oopDesc::equals(cl, loader)) return true; 4131 cl = parent(cl); 4132 } 4133 return false; 4134 } 4135 4136 // Return true if this is one of the class loaders associated with 4137 // the generated bytecodes for reflection. 4138 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4139 if (loader != NULL) { 4140 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4141 // This might be null in non-1.4 JDKs 4142 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4143 } 4144 return false; 4145 } 4146 4147 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4148 // See whether this is one of the class loaders associated with 4149 // the generated bytecodes for reflection, and if so, "magically" 4150 // delegate to its parent to prevent class loading from occurring 4151 // in places where applications using reflection didn't expect it. 4152 if (is_reflection_class_loader(loader)) { 4153 return parent(loader); 4154 } 4155 return loader; 4156 } 4157 4158 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4159 assert(is_instance(loader), "loader must be oop"); 4160 return loader->obj_field(unnamedModule_offset); 4161 } 4162 4163 // Support for java_lang_System 4164 // 4165 #define SYSTEM_FIELDS_DO(macro) \ 4166 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4167 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4168 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4169 macro(static_security_offset, k, "security", security_manager_signature, true) 4170 4171 void java_lang_System::compute_offsets() { 4172 InstanceKlass* k = SystemDictionary::System_klass(); 4173 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4174 } 4175 4176 #if INCLUDE_CDS 4177 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4178 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4179 } 4180 #endif 4181 4182 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4183 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4184 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4185 4186 4187 bool java_lang_System::has_security_manager() { 4188 InstanceKlass* ik = SystemDictionary::System_klass(); 4189 oop base = ik->static_field_base_raw(); 4190 return base->obj_field(static_security_offset) != NULL; 4191 } 4192 4193 int java_lang_Class::_klass_offset; 4194 int java_lang_Class::_array_klass_offset; 4195 int java_lang_Class::_oop_size_offset; 4196 int java_lang_Class::_static_oop_field_count_offset; 4197 int java_lang_Class::_class_loader_offset; 4198 int java_lang_Class::_module_offset; 4199 int java_lang_Class::_protection_domain_offset; 4200 int java_lang_Class::_component_mirror_offset; 4201 int java_lang_Class::_init_lock_offset; 4202 int java_lang_Class::_signers_offset; 4203 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4204 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4205 int java_lang_Throwable::backtrace_offset; 4206 int java_lang_Throwable::detailMessage_offset; 4207 int java_lang_Throwable::stackTrace_offset; 4208 int java_lang_Throwable::depth_offset; 4209 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4210 int java_lang_reflect_AccessibleObject::override_offset; 4211 int java_lang_reflect_Method::clazz_offset; 4212 int java_lang_reflect_Method::name_offset; 4213 int java_lang_reflect_Method::returnType_offset; 4214 int java_lang_reflect_Method::parameterTypes_offset; 4215 int java_lang_reflect_Method::exceptionTypes_offset; 4216 int java_lang_reflect_Method::slot_offset; 4217 int java_lang_reflect_Method::modifiers_offset; 4218 int java_lang_reflect_Method::signature_offset; 4219 int java_lang_reflect_Method::annotations_offset; 4220 int java_lang_reflect_Method::parameter_annotations_offset; 4221 int java_lang_reflect_Method::annotation_default_offset; 4222 int java_lang_reflect_Method::type_annotations_offset; 4223 int java_lang_reflect_Constructor::clazz_offset; 4224 int java_lang_reflect_Constructor::parameterTypes_offset; 4225 int java_lang_reflect_Constructor::exceptionTypes_offset; 4226 int java_lang_reflect_Constructor::slot_offset; 4227 int java_lang_reflect_Constructor::modifiers_offset; 4228 int java_lang_reflect_Constructor::signature_offset; 4229 int java_lang_reflect_Constructor::annotations_offset; 4230 int java_lang_reflect_Constructor::parameter_annotations_offset; 4231 int java_lang_reflect_Constructor::type_annotations_offset; 4232 int java_lang_reflect_Field::clazz_offset; 4233 int java_lang_reflect_Field::name_offset; 4234 int java_lang_reflect_Field::type_offset; 4235 int java_lang_reflect_Field::slot_offset; 4236 int java_lang_reflect_Field::modifiers_offset; 4237 int java_lang_reflect_Field::signature_offset; 4238 int java_lang_reflect_Field::annotations_offset; 4239 int java_lang_reflect_Field::type_annotations_offset; 4240 int java_lang_reflect_Parameter::name_offset; 4241 int java_lang_reflect_Parameter::modifiers_offset; 4242 int java_lang_reflect_Parameter::index_offset; 4243 int java_lang_reflect_Parameter::executable_offset; 4244 int java_lang_boxing_object::value_offset; 4245 int java_lang_boxing_object::long_value_offset; 4246 int java_lang_ref_Reference::referent_offset; 4247 int java_lang_ref_Reference::queue_offset; 4248 int java_lang_ref_Reference::next_offset; 4249 int java_lang_ref_Reference::discovered_offset; 4250 int java_lang_ref_SoftReference::timestamp_offset; 4251 int java_lang_ref_SoftReference::static_clock_offset; 4252 int java_lang_ClassLoader::parent_offset; 4253 int java_lang_System::static_in_offset; 4254 int java_lang_System::static_out_offset; 4255 int java_lang_System::static_err_offset; 4256 int java_lang_System::static_security_offset; 4257 int java_lang_StackTraceElement::methodName_offset; 4258 int java_lang_StackTraceElement::fileName_offset; 4259 int java_lang_StackTraceElement::lineNumber_offset; 4260 int java_lang_StackTraceElement::moduleName_offset; 4261 int java_lang_StackTraceElement::moduleVersion_offset; 4262 int java_lang_StackTraceElement::classLoaderName_offset; 4263 int java_lang_StackTraceElement::declaringClass_offset; 4264 int java_lang_StackTraceElement::declaringClassObject_offset; 4265 int java_lang_StackFrameInfo::_memberName_offset; 4266 int java_lang_StackFrameInfo::_bci_offset; 4267 int java_lang_StackFrameInfo::_version_offset; 4268 int java_lang_LiveStackFrameInfo::_monitors_offset; 4269 int java_lang_LiveStackFrameInfo::_locals_offset; 4270 int java_lang_LiveStackFrameInfo::_operands_offset; 4271 int java_lang_LiveStackFrameInfo::_mode_offset; 4272 int java_lang_AssertionStatusDirectives::classes_offset; 4273 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4274 int java_lang_AssertionStatusDirectives::packages_offset; 4275 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4276 int java_lang_AssertionStatusDirectives::deflt_offset; 4277 int java_nio_Buffer::_limit_offset; 4278 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 4279 int reflect_ConstantPool::_oop_offset; 4280 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4281 4282 4283 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4284 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4285 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4286 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4287 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4288 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4289 macro(methodName_offset, k, "methodName", string_signature, false); \ 4290 macro(fileName_offset, k, "fileName", string_signature, false); \ 4291 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4292 4293 // Support for java_lang_StackTraceElement 4294 void java_lang_StackTraceElement::compute_offsets() { 4295 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4296 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4297 } 4298 4299 #if INCLUDE_CDS 4300 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4301 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4302 } 4303 #endif 4304 4305 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4306 element->obj_field_put(fileName_offset, value); 4307 } 4308 4309 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4310 element->obj_field_put(declaringClass_offset, value); 4311 } 4312 4313 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4314 element->obj_field_put(methodName_offset, value); 4315 } 4316 4317 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4318 element->int_field_put(lineNumber_offset, value); 4319 } 4320 4321 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4322 element->obj_field_put(moduleName_offset, value); 4323 } 4324 4325 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4326 element->obj_field_put(moduleVersion_offset, value); 4327 } 4328 4329 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4330 element->obj_field_put(classLoaderName_offset, value); 4331 } 4332 4333 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4334 element->obj_field_put(declaringClassObject_offset, value); 4335 } 4336 4337 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4338 element->short_field_put(_version_offset, value); 4339 } 4340 4341 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4342 element->int_field_put(_bci_offset, value); 4343 } 4344 4345 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4346 element->obj_field_put(_monitors_offset, value); 4347 } 4348 4349 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4350 element->obj_field_put(_locals_offset, value); 4351 } 4352 4353 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4354 element->obj_field_put(_operands_offset, value); 4355 } 4356 4357 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4358 element->int_field_put(_mode_offset, value); 4359 } 4360 4361 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4362 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4363 macro(classes_offset, k, "classes", string_array_signature, false); \ 4364 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4365 macro(packages_offset, k, "packages", string_array_signature, false); \ 4366 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4367 macro(deflt_offset, k, "deflt", bool_signature, false) 4368 4369 void java_lang_AssertionStatusDirectives::compute_offsets() { 4370 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4371 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4372 } 4373 4374 #if INCLUDE_CDS 4375 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4376 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4377 } 4378 #endif 4379 4380 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4381 o->obj_field_put(classes_offset, val); 4382 } 4383 4384 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4385 o->obj_field_put(classEnabled_offset, val); 4386 } 4387 4388 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4389 o->obj_field_put(packages_offset, val); 4390 } 4391 4392 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4393 o->obj_field_put(packageEnabled_offset, val); 4394 } 4395 4396 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4397 o->bool_field_put(deflt_offset, val); 4398 } 4399 4400 4401 // Support for intrinsification of java.nio.Buffer.checkIndex 4402 int java_nio_Buffer::limit_offset() { 4403 return _limit_offset; 4404 } 4405 4406 #define BUFFER_FIELDS_DO(macro) \ 4407 macro(_limit_offset, k, "limit", int_signature, false) 4408 4409 void java_nio_Buffer::compute_offsets() { 4410 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4411 assert(k != NULL, "must be loaded in 1.4+"); 4412 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4413 } 4414 4415 #if INCLUDE_CDS 4416 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) { 4417 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4418 } 4419 #endif 4420 4421 #define AOS_FIELDS_DO(macro) \ 4422 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 4423 4424 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 4425 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 4426 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4427 } 4428 4429 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4430 assert(_owner_offset != 0, "Must be initialized"); 4431 return obj->obj_field(_owner_offset); 4432 } 4433 4434 #if INCLUDE_CDS 4435 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 4436 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4437 } 4438 #endif 4439 4440 static int member_offset(int hardcoded_offset) { 4441 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4442 } 4443 4444 // Compute hard-coded offsets 4445 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4446 // are not available to determine the offset_of_static_fields. 4447 void JavaClasses::compute_hard_coded_offsets() { 4448 4449 // java_lang_boxing_object 4450 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4451 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4452 4453 // java_lang_ref_Reference 4454 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4455 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4456 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4457 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4458 } 4459 4460 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 4461 4462 // Compute non-hard-coded field offsets of all the classes in this file 4463 void JavaClasses::compute_offsets() { 4464 if (UseSharedSpaces) { 4465 return; // field offsets are loaded from archive 4466 } 4467 4468 // We have already called the compute_offsets() of the 4469 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class) 4470 // earlier inside SystemDictionary::resolve_preloaded_classes() 4471 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 4472 4473 // generated interpreter code wants to know about the offsets we just computed: 4474 AbstractAssembler::update_delayed_values(); 4475 } 4476 4477 #if INCLUDE_CDS 4478 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 4479 4480 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 4481 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 4482 } 4483 #endif 4484 4485 4486 #ifndef PRODUCT 4487 4488 // These functions exist to assert the validity of hard-coded field offsets to guard 4489 // against changes in the class files 4490 4491 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4492 EXCEPTION_MARK; 4493 fieldDescriptor fd; 4494 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4495 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4496 InstanceKlass* ik = InstanceKlass::cast(k); 4497 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4498 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4499 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4500 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4501 return false; 4502 } 4503 if (fd.is_static()) { 4504 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4505 return false; 4506 } 4507 if (fd.offset() == hardcoded_offset ) { 4508 return true; 4509 } else { 4510 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4511 klass_name, field_name, hardcoded_offset, fd.offset()); 4512 return false; 4513 } 4514 } 4515 4516 // Check the hard-coded field offsets of all the classes in this file 4517 4518 void JavaClasses::check_offsets() { 4519 bool valid = true; 4520 4521 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4522 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4523 4524 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4525 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4526 4527 // Boxed primitive objects (java_lang_boxing_object) 4528 4529 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4530 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4531 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4532 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4533 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4534 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4535 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4536 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4537 4538 // java.lang.ref.Reference 4539 4540 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4541 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4542 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4543 // Fake field 4544 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4545 4546 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4547 } 4548 4549 #endif // PRODUCT 4550 4551 int InjectedField::compute_offset() { 4552 InstanceKlass* ik = InstanceKlass::cast(klass()); 4553 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4554 if (!may_be_java && !fs.access_flags().is_internal()) { 4555 // Only look at injected fields 4556 continue; 4557 } 4558 if (fs.name() == name() && fs.signature() == signature()) { 4559 return fs.offset(); 4560 } 4561 } 4562 ResourceMark rm; 4563 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)" : ""); 4564 #ifndef PRODUCT 4565 ik->print(); 4566 tty->print_cr("all fields:"); 4567 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4568 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4569 } 4570 #endif //PRODUCT 4571 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4572 return -1; 4573 } 4574 4575 void javaClasses_init() { 4576 JavaClasses::compute_offsets(); 4577 JavaClasses::check_offsets(); 4578 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4579 }