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