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