1 /* 2 * Copyright (c) 1997, 2015, 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/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/instanceMirrorKlass.hpp" 39 #include "oops/klass.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "oops/typeArrayOop.hpp" 45 #include "prims/jvmtiRedefineClassesTrace.hpp" 46 #include "runtime/fieldDescriptor.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/safepoint.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.hpp" 54 #include "utilities/preserveException.hpp" 55 56 #if INCLUDE_JVMCI 57 #include "jvmci/jvmciJavaClasses.hpp" 58 #endif 59 60 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 61 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 62 63 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 64 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 65 66 InjectedField JavaClasses::_injected_fields[] = { 67 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 68 }; 69 70 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 71 return _injected_fields[id].compute_offset(); 72 } 73 74 75 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 76 *field_count = 0; 77 78 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 79 if (sid == vmSymbols::NO_SID) { 80 // Only well known classes can inject fields 81 return NULL; 82 } 83 84 int count = 0; 85 int start = -1; 86 87 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 88 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 89 count++; \ 90 if (start == -1) start = klass##_##name##_enum; \ 91 } 92 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 93 #undef LOOKUP_INJECTED_FIELD 94 95 if (start != -1) { 96 *field_count = count; 97 return _injected_fields + start; 98 } 99 return NULL; 100 } 101 102 103 static bool find_field(InstanceKlass* ik, 104 Symbol* name_symbol, Symbol* signature_symbol, 105 fieldDescriptor* fd, 106 bool is_static = false, bool allow_super = false) { 107 if (allow_super || is_static) { 108 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 109 } else { 110 return ik->find_local_field(name_symbol, signature_symbol, fd); 111 } 112 } 113 114 // Helpful routine for computing field offsets at run time rather than hardcoding them 115 static void 116 compute_offset(int &dest_offset, 117 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 118 bool is_static = false, bool allow_super = false) { 119 fieldDescriptor fd; 120 InstanceKlass* ik = InstanceKlass::cast(klass); 121 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 122 ResourceMark rm; 123 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 124 #ifndef PRODUCT 125 ik->print(); 126 tty->print_cr("all fields:"); 127 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 128 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 129 } 130 #endif //PRODUCT 131 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 132 } 133 dest_offset = fd.offset(); 134 } 135 136 // Same as above but for "optional" offsets that might not be present in certain JDK versions 137 static void 138 compute_optional_offset(int& dest_offset, 139 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 140 bool allow_super = false) { 141 fieldDescriptor fd; 142 InstanceKlass* ik = InstanceKlass::cast(klass); 143 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 144 dest_offset = fd.offset(); 145 } 146 } 147 148 149 int java_lang_String::value_offset = 0; 150 int java_lang_String::hash_offset = 0; 151 int java_lang_String::coder_offset = 0; 152 153 bool java_lang_String::initialized = false; 154 155 bool java_lang_String::is_instance(oop obj) { 156 return is_instance_inlined(obj); 157 } 158 159 void java_lang_String::compute_offsets() { 160 assert(!initialized, "offsets should be initialized only once"); 161 162 Klass* k = SystemDictionary::String_klass(); 163 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 164 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 165 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 166 167 initialized = true; 168 } 169 170 class CompactStringsFixup : public FieldClosure { 171 private: 172 bool _value; 173 174 public: 175 CompactStringsFixup(bool value) : _value(value) {} 176 177 void do_field(fieldDescriptor* fd) { 178 if (fd->name() == vmSymbols::compact_strings_name()) { 179 oop mirror = fd->field_holder()->java_mirror(); 180 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 181 assert(mirror != NULL, "String must have mirror already"); 182 mirror->bool_field_put(fd->offset(), _value); 183 } 184 } 185 }; 186 187 void java_lang_String::set_compact_strings(bool value) { 188 CompactStringsFixup fix(value); 189 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 190 } 191 192 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 193 assert(initialized, "Must be initialized"); 194 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 195 196 // Create the String object first, so there's a chance that the String 197 // and the char array it points to end up in the same cache line. 198 oop obj; 199 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 200 201 // Create the char array. The String object must be handlized here 202 // because GC can happen as a result of the allocation attempt. 203 Handle h_obj(THREAD, obj); 204 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 205 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 206 207 // Point the String at the char array 208 obj = h_obj(); 209 set_value(obj, buffer); 210 // No need to zero the offset, allocation zero'ed the entire String object 211 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 212 return h_obj; 213 } 214 215 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 216 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 217 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 218 typeArrayOop buffer = value(h_obj()); 219 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 220 if (is_latin1) { 221 for (int index = 0; index < length; index++) { 222 buffer->byte_at_put(index, (jbyte)unicode[index]); 223 } 224 } else { 225 for (int index = 0; index < length; index++) { 226 buffer->char_at_put(index, unicode[index]); 227 } 228 } 229 230 #ifdef ASSERT 231 { 232 ResourceMark rm; 233 char* expected = UNICODE::as_utf8(unicode, length); 234 char* actual = as_utf8_string(h_obj()); 235 if (strcmp(expected, actual) != 0) { 236 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 237 ShouldNotReachHere(); 238 } 239 } 240 #endif 241 242 return h_obj; 243 } 244 245 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 246 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 247 return h_obj(); 248 } 249 250 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 251 if (utf8_str == NULL) { 252 return Handle(); 253 } 254 bool has_multibyte, is_latin1; 255 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 256 if (!CompactStrings) { 257 has_multibyte = true; 258 is_latin1 = false; 259 } 260 261 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 262 if (length > 0) { 263 if (!has_multibyte) { 264 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 265 } else if (is_latin1) { 266 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 267 } else { 268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 269 } 270 } 271 272 #ifdef ASSERT 273 // This check is too strict because the input string is not necessarily valid UTF8. 274 // For example, it may be created with arbitrary content via jni_NewStringUTF. 275 /* 276 { 277 ResourceMark rm; 278 const char* expected = utf8_str; 279 char* actual = as_utf8_string(h_obj()); 280 if (strcmp(expected, actual) != 0) { 281 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 282 ShouldNotReachHere(); 283 } 284 } 285 */ 286 #endif 287 288 return h_obj; 289 } 290 291 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 292 Handle h_obj = create_from_str(utf8_str, CHECK_0); 293 return h_obj(); 294 } 295 296 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 297 const char* utf8_str = (char*)symbol->bytes(); 298 int utf8_len = symbol->utf8_length(); 299 300 bool has_multibyte, is_latin1; 301 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 302 if (!CompactStrings) { 303 has_multibyte = true; 304 is_latin1 = false; 305 } 306 307 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 308 if (length > 0) { 309 if (!has_multibyte) { 310 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 311 } else if (is_latin1) { 312 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 313 } else { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 315 } 316 } 317 318 #ifdef ASSERT 319 { 320 ResourceMark rm; 321 const char* expected = symbol->as_utf8(); 322 char* actual = as_utf8_string(h_obj()); 323 if (strncmp(expected, actual, utf8_len) != 0) { 324 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 325 ShouldNotReachHere(); 326 } 327 } 328 #endif 329 330 return h_obj; 331 } 332 333 // Converts a C string to a Java String based on current encoding 334 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 335 assert(str != NULL, "bad arguments"); 336 337 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 338 static to_java_string_fn_t _to_java_string_fn = NULL; 339 340 if (_to_java_string_fn == NULL) { 341 void *lib_handle = os::native_java_library(); 342 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 343 if (_to_java_string_fn == NULL) { 344 fatal("NewStringPlatform missing"); 345 } 346 } 347 348 jstring js = NULL; 349 { JavaThread* thread = (JavaThread*)THREAD; 350 assert(thread->is_Java_thread(), "must be java thread"); 351 HandleMark hm(thread); 352 ThreadToNativeFromVM ttn(thread); 353 js = (_to_java_string_fn)(thread->jni_environment(), str); 354 } 355 return Handle(THREAD, JNIHandles::resolve(js)); 356 } 357 358 // Converts a Java String to a native C string that can be used for 359 // native OS calls. 360 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 361 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 362 static to_platform_string_fn_t _to_platform_string_fn = NULL; 363 364 if (_to_platform_string_fn == NULL) { 365 void *lib_handle = os::native_java_library(); 366 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 367 if (_to_platform_string_fn == NULL) { 368 fatal("GetStringPlatformChars missing"); 369 } 370 } 371 372 char *native_platform_string; 373 { JavaThread* thread = (JavaThread*)THREAD; 374 assert(thread->is_Java_thread(), "must be java thread"); 375 JNIEnv *env = thread->jni_environment(); 376 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 377 bool is_copy; 378 HandleMark hm(thread); 379 ThreadToNativeFromVM ttn(thread); 380 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 381 assert(is_copy == JNI_TRUE, "is_copy value changed"); 382 JNIHandles::destroy_local(js); 383 } 384 return native_platform_string; 385 } 386 387 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 388 oop obj = java_string(); 389 // Typical usage is to convert all '/' to '.' in string. 390 typeArrayOop value = java_lang_String::value(obj); 391 int length = java_lang_String::length(obj); 392 bool is_latin1 = java_lang_String::is_latin1(obj); 393 394 // First check if any from_char exist 395 int index; // Declared outside, used later 396 for (index = 0; index < length; index++) { 397 jchar c = !is_latin1 ? value->char_at(index) : 398 ((jchar) value->byte_at(index)) & 0xff; 399 if (c == from_char) { 400 break; 401 } 402 } 403 if (index == length) { 404 // No from_char, so do not copy. 405 return java_string; 406 } 407 408 // Check if result string will be latin1 409 bool to_is_latin1 = false; 410 411 // Replacement char must be latin1 412 if (CompactStrings && UNICODE::is_latin1(to_char)) { 413 if (is_latin1) { 414 // Source string is latin1 as well 415 to_is_latin1 = true; 416 } else if (!UNICODE::is_latin1(from_char)) { 417 // We are replacing an UTF16 char. Scan string to 418 // check if result can be latin1 encoded. 419 to_is_latin1 = true; 420 for (index = 0; index < length; index++) { 421 jchar c = value->char_at(index); 422 if (c != from_char && !UNICODE::is_latin1(c)) { 423 to_is_latin1 = false; 424 break; 425 } 426 } 427 } 428 } 429 430 // Create new UNICODE (or byte) buffer. Must handlize value because GC 431 // may happen during String and char array creation. 432 typeArrayHandle h_value(THREAD, value); 433 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 434 typeArrayOop from_buffer = h_value(); 435 typeArrayOop to_buffer = java_lang_String::value(string()); 436 437 // Copy contents 438 for (index = 0; index < length; index++) { 439 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 440 ((jchar) from_buffer->byte_at(index)) & 0xff; 441 if (c == from_char) { 442 c = to_char; 443 } 444 if (!to_is_latin1) { 445 to_buffer->char_at_put(index, c); 446 } else { 447 to_buffer->byte_at_put(index, (jbyte) c); 448 } 449 } 450 return string; 451 } 452 453 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 454 typeArrayOop value = java_lang_String::value(java_string); 455 length = java_lang_String::length(java_string); 456 bool is_latin1 = java_lang_String::is_latin1(java_string); 457 458 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 459 if (result != NULL) { 460 if (!is_latin1) { 461 for (int index = 0; index < length; index++) { 462 result[index] = value->char_at(index); 463 } 464 } else { 465 for (int index = 0; index < length; index++) { 466 result[index] = ((jchar) value->byte_at(index)) & 0xff; 467 } 468 } 469 } else { 470 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 471 } 472 return result; 473 } 474 475 unsigned int java_lang_String::hash_code(oop java_string) { 476 int length = java_lang_String::length(java_string); 477 // Zero length string will hash to zero with String.hashCode() function. 478 if (length == 0) return 0; 479 480 typeArrayOop value = java_lang_String::value(java_string); 481 bool is_latin1 = java_lang_String::is_latin1(java_string); 482 483 if (is_latin1) { 484 return java_lang_String::hash_code(value->byte_at_addr(0), length); 485 } else { 486 return java_lang_String::hash_code(value->char_at_addr(0), length); 487 } 488 } 489 490 char* java_lang_String::as_quoted_ascii(oop java_string) { 491 typeArrayOop value = java_lang_String::value(java_string); 492 int length = java_lang_String::length(java_string); 493 bool is_latin1 = java_lang_String::is_latin1(java_string); 494 495 if (length == 0) return NULL; 496 497 char* result; 498 int result_length; 499 if (!is_latin1) { 500 jchar* base = value->char_at_addr(0); 501 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 502 result = NEW_RESOURCE_ARRAY(char, result_length); 503 UNICODE::as_quoted_ascii(base, length, result, result_length); 504 } else { 505 jbyte* base = value->byte_at_addr(0); 506 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 507 result = NEW_RESOURCE_ARRAY(char, result_length); 508 UNICODE::as_quoted_ascii(base, length, result, result_length); 509 } 510 assert(result_length >= length + 1, "must not be shorter"); 511 assert(result_length == (int)strlen(result) + 1, "must match"); 512 return result; 513 } 514 515 unsigned int java_lang_String::hash_string(oop java_string) { 516 int length = java_lang_String::length(java_string); 517 // Zero length string doesn't necessarily hash to zero. 518 if (length == 0) { 519 return StringTable::hash_string((jchar*) NULL, 0); 520 } 521 522 typeArrayOop value = java_lang_String::value(java_string); 523 bool is_latin1 = java_lang_String::is_latin1(java_string); 524 if (is_latin1) { 525 return StringTable::hash_string(value->byte_at_addr(0), length); 526 } else { 527 return StringTable::hash_string(value->char_at_addr(0), length); 528 } 529 } 530 531 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 532 oop obj = java_string(); 533 typeArrayOop value = java_lang_String::value(obj); 534 int length = java_lang_String::length(obj); 535 bool is_latin1 = java_lang_String::is_latin1(obj); 536 if (!is_latin1) { 537 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 538 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 539 return sym; 540 } else { 541 ResourceMark rm; 542 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 543 const char* base = UNICODE::as_utf8(position, length); 544 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 545 return sym; 546 } 547 } 548 549 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 if (!is_latin1) { 554 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 555 return SymbolTable::probe_unicode(base, length); 556 } else { 557 ResourceMark rm; 558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 559 const char* base = UNICODE::as_utf8(position, length); 560 return SymbolTable::probe(base, length); 561 } 562 } 563 564 int java_lang_String::utf8_length(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (length == 0) { 569 return 0; 570 } 571 if (!is_latin1) { 572 return UNICODE::utf8_length(value->char_at_addr(0), length); 573 } else { 574 return UNICODE::utf8_length(value->byte_at_addr(0), length); 575 } 576 } 577 578 char* java_lang_String::as_utf8_string(oop java_string) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 584 return UNICODE::as_utf8(position, length); 585 } else { 586 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 587 return UNICODE::as_utf8(position, length); 588 } 589 } 590 591 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 597 return UNICODE::as_utf8(position, length, buf, buflen); 598 } else { 599 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 600 return UNICODE::as_utf8(position, length, buf, buflen); 601 } 602 } 603 604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 605 typeArrayOop value = java_lang_String::value(java_string); 606 int length = java_lang_String::length(java_string); 607 assert(start + len <= length, "just checking"); 608 bool is_latin1 = java_lang_String::is_latin1(java_string); 609 if (!is_latin1) { 610 jchar* position = value->char_at_addr(start); 611 return UNICODE::as_utf8(position, len); 612 } else { 613 jbyte* position = value->byte_at_addr(start); 614 return UNICODE::as_utf8(position, len); 615 } 616 } 617 618 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 619 typeArrayOop value = java_lang_String::value(java_string); 620 int length = java_lang_String::length(java_string); 621 assert(start + len <= length, "just checking"); 622 bool is_latin1 = java_lang_String::is_latin1(java_string); 623 if (!is_latin1) { 624 jchar* position = value->char_at_addr(start); 625 return UNICODE::as_utf8(position, len, buf, buflen); 626 } else { 627 jbyte* position = value->byte_at_addr(start); 628 return UNICODE::as_utf8(position, len, buf, buflen); 629 } 630 } 631 632 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 633 assert(java_string->klass() == SystemDictionary::String_klass(), 634 "must be java_string"); 635 typeArrayOop value = java_lang_String::value(java_string); 636 int length = java_lang_String::length(java_string); 637 if (length != len) { 638 return false; 639 } 640 bool is_latin1 = java_lang_String::is_latin1(java_string); 641 if (!is_latin1) { 642 for (int i = 0; i < len; i++) { 643 if (value->char_at(i) != chars[i]) { 644 return false; 645 } 646 } 647 } else { 648 for (int i = 0; i < len; i++) { 649 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 650 return false; 651 } 652 } 653 } 654 return true; 655 } 656 657 bool java_lang_String::equals(oop str1, oop str2) { 658 assert(str1->klass() == SystemDictionary::String_klass(), 659 "must be java String"); 660 assert(str2->klass() == SystemDictionary::String_klass(), 661 "must be java String"); 662 typeArrayOop value1 = java_lang_String::value(str1); 663 int length1 = java_lang_String::length(str1); 664 bool is_latin1 = java_lang_String::is_latin1(str1); 665 typeArrayOop value2 = java_lang_String::value(str2); 666 int length2 = java_lang_String::length(str2); 667 bool is_latin2 = java_lang_String::is_latin1(str2); 668 669 if ((length1 != length2) || (is_latin1 != is_latin2)) { 670 // Strings of different size or with different 671 // coders are never equal. 672 return false; 673 } 674 int blength1 = value1->length(); 675 for (int i = 0; i < value1->length(); i++) { 676 if (value1->byte_at(i) != value2->byte_at(i)) { 677 return false; 678 } 679 } 680 return true; 681 } 682 683 void java_lang_String::print(oop java_string, outputStream* st) { 684 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 685 typeArrayOop value = java_lang_String::value(java_string); 686 687 if (value == NULL) { 688 // This can happen if, e.g., printing a String 689 // object before its initializer has been called 690 st->print("NULL"); 691 return; 692 } 693 694 int length = java_lang_String::length(java_string); 695 bool is_latin1 = java_lang_String::is_latin1(java_string); 696 697 st->print("\""); 698 for (int index = 0; index < length; index++) { 699 st->print("%c", (!is_latin1) ? value->char_at(index) : 700 ((jchar) value->byte_at(index)) & 0xff ); 701 } 702 st->print("\""); 703 } 704 705 706 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 707 assert(mirror.not_null() && fd->is_static(), "just checking"); 708 if (fd->has_initial_value()) { 709 BasicType t = fd->field_type(); 710 switch (t) { 711 case T_BYTE: 712 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 713 break; 714 case T_BOOLEAN: 715 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 716 break; 717 case T_CHAR: 718 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 719 break; 720 case T_SHORT: 721 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 722 break; 723 case T_INT: 724 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 725 break; 726 case T_FLOAT: 727 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 728 break; 729 case T_DOUBLE: 730 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 731 break; 732 case T_LONG: 733 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 734 break; 735 case T_OBJECT: 736 { 737 #ifdef ASSERT 738 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 739 assert(fd->signature() == sym, "just checking"); 740 #endif 741 oop string = fd->string_initial_value(CHECK); 742 mirror()->obj_field_put(fd->offset(), string); 743 } 744 break; 745 default: 746 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 747 "Illegal ConstantValue attribute in class file"); 748 } 749 } 750 } 751 752 753 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 754 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 755 756 // If the offset was read from the shared archive, it was fixed up already 757 if (!k->is_shared()) { 758 if (k->is_instance_klass()) { 759 // During bootstrap, java.lang.Class wasn't loaded so static field 760 // offsets were computed without the size added it. Go back and 761 // update all the static field offsets to included the size. 762 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 763 if (fs.access_flags().is_static()) { 764 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 765 fs.set_offset(real_offset); 766 } 767 } 768 } 769 } 770 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 771 } 772 773 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 774 Handle mirror, 775 Handle protection_domain, 776 TRAPS) { 777 // Allocate a simple java object for a lock. 778 // This needs to be a java object because during class initialization 779 // it can be held across a java call. 780 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 781 set_init_lock(mirror(), r); 782 783 // Set protection domain also 784 set_protection_domain(mirror(), protection_domain()); 785 786 // Initialize static fields 787 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 788 } 789 790 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 791 Handle protection_domain, TRAPS) { 792 assert(k->java_mirror() == NULL, "should only assign mirror once"); 793 // Use this moment of initialization to cache modifier_flags also, 794 // to support Class.getModifiers(). Instance classes recalculate 795 // the cached flags after the class file is parsed, but before the 796 // class is put into the system dictionary. 797 int computed_modifiers = k->compute_modifier_flags(CHECK); 798 k->set_modifier_flags(computed_modifiers); 799 // Class_klass has to be loaded because it is used to allocate 800 // the mirror. 801 if (SystemDictionary::Class_klass_loaded()) { 802 // Allocate mirror (java.lang.Class instance) 803 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 804 805 // Setup indirection from mirror->klass 806 if (!k.is_null()) { 807 java_lang_Class::set_klass(mirror(), k()); 808 } 809 810 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 811 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 812 813 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 814 815 // It might also have a component mirror. This mirror must already exist. 816 if (k->is_array_klass()) { 817 Handle comp_mirror; 818 if (k->is_typeArray_klass()) { 819 BasicType type = TypeArrayKlass::cast(k())->element_type(); 820 comp_mirror = Universe::java_mirror(type); 821 } else { 822 assert(k->is_objArray_klass(), "Must be"); 823 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 824 assert(element_klass != NULL, "Must have an element klass"); 825 comp_mirror = element_klass->java_mirror(); 826 } 827 assert(comp_mirror.not_null(), "must have a mirror"); 828 829 // Two-way link between the array klass and its component mirror: 830 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 831 set_component_mirror(mirror(), comp_mirror()); 832 set_array_klass(comp_mirror(), k()); 833 } else { 834 assert(k->is_instance_klass(), "Must be"); 835 836 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 837 if (HAS_PENDING_EXCEPTION) { 838 // If any of the fields throws an exception like OOM remove the klass field 839 // from the mirror so GC doesn't follow it after the klass has been deallocated. 840 // This mirror looks like a primitive type, which logically it is because it 841 // it represents no class. 842 java_lang_Class::set_klass(mirror(), NULL); 843 return; 844 } 845 } 846 847 // set the classLoader field in the java_lang_Class instance 848 assert(class_loader() == k->class_loader(), "should be same"); 849 set_class_loader(mirror(), class_loader()); 850 851 // Setup indirection from klass->mirror last 852 // after any exceptions can happen during allocations. 853 if (!k.is_null()) { 854 k->set_java_mirror(mirror()); 855 } 856 } else { 857 if (fixup_mirror_list() == NULL) { 858 GrowableArray<Klass*>* list = 859 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 860 set_fixup_mirror_list(list); 861 } 862 fixup_mirror_list()->push(k()); 863 } 864 } 865 866 867 int java_lang_Class::oop_size(oop java_class) { 868 assert(_oop_size_offset != 0, "must be set"); 869 return java_class->int_field(_oop_size_offset); 870 } 871 void java_lang_Class::set_oop_size(oop java_class, int size) { 872 assert(_oop_size_offset != 0, "must be set"); 873 java_class->int_field_put(_oop_size_offset, size); 874 } 875 int java_lang_Class::static_oop_field_count(oop java_class) { 876 assert(_static_oop_field_count_offset != 0, "must be set"); 877 return java_class->int_field(_static_oop_field_count_offset); 878 } 879 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 880 assert(_static_oop_field_count_offset != 0, "must be set"); 881 java_class->int_field_put(_static_oop_field_count_offset, size); 882 } 883 884 oop java_lang_Class::protection_domain(oop java_class) { 885 assert(_protection_domain_offset != 0, "must be set"); 886 return java_class->obj_field(_protection_domain_offset); 887 } 888 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 889 assert(_protection_domain_offset != 0, "must be set"); 890 java_class->obj_field_put(_protection_domain_offset, pd); 891 } 892 893 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 894 assert(_component_mirror_offset != 0, "must be set"); 895 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 896 } 897 oop java_lang_Class::component_mirror(oop java_class) { 898 assert(_component_mirror_offset != 0, "must be set"); 899 return java_class->obj_field(_component_mirror_offset); 900 } 901 902 oop java_lang_Class::init_lock(oop java_class) { 903 assert(_init_lock_offset != 0, "must be set"); 904 return java_class->obj_field(_init_lock_offset); 905 } 906 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 907 assert(_init_lock_offset != 0, "must be set"); 908 java_class->obj_field_put(_init_lock_offset, init_lock); 909 } 910 911 objArrayOop java_lang_Class::signers(oop java_class) { 912 assert(_signers_offset != 0, "must be set"); 913 return (objArrayOop)java_class->obj_field(_signers_offset); 914 } 915 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 916 assert(_signers_offset != 0, "must be set"); 917 java_class->obj_field_put(_signers_offset, (oop)signers); 918 } 919 920 921 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 922 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 923 if (_class_loader_offset != 0) { 924 java_class->obj_field_put(_class_loader_offset, loader); 925 } 926 } 927 928 oop java_lang_Class::class_loader(oop java_class) { 929 assert(_class_loader_offset != 0, "must be set"); 930 return java_class->obj_field(_class_loader_offset); 931 } 932 933 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 934 // This should be improved by adding a field at the Java level or by 935 // introducing a new VM klass (see comment in ClassFileParser) 936 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 937 if (type != T_VOID) { 938 Klass* aklass = Universe::typeArrayKlassObj(type); 939 assert(aklass != NULL, "correct bootstrap"); 940 set_array_klass(java_class, aklass); 941 } 942 #ifdef ASSERT 943 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 944 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 945 #endif 946 return java_class; 947 } 948 949 950 Klass* java_lang_Class::as_Klass(oop java_class) { 951 //%note memory_2 952 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 953 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 954 assert(k == NULL || k->is_klass(), "type check"); 955 return k; 956 } 957 958 959 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 960 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 961 java_class->metadata_field_put(_klass_offset, klass); 962 } 963 964 965 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 966 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 967 Symbol* name = NULL; 968 bool is_instance = false; 969 if (is_primitive(java_class)) { 970 name = vmSymbols::type_signature(primitive_type(java_class)); 971 } else { 972 Klass* k = as_Klass(java_class); 973 is_instance = k->is_instance_klass(); 974 name = k->name(); 975 } 976 if (name == NULL) { 977 st->print("<null>"); 978 return; 979 } 980 if (is_instance) st->print("L"); 981 st->write((char*) name->base(), (int) name->utf8_length()); 982 if (is_instance) st->print(";"); 983 } 984 985 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 986 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 987 Symbol* name; 988 if (is_primitive(java_class)) { 989 name = vmSymbols::type_signature(primitive_type(java_class)); 990 // Because this can create a new symbol, the caller has to decrement 991 // the refcount, so make adjustment here and below for symbols returned 992 // that are not created or incremented due to a successful lookup. 993 name->increment_refcount(); 994 } else { 995 Klass* k = as_Klass(java_class); 996 if (!k->is_instance_klass()) { 997 name = k->name(); 998 name->increment_refcount(); 999 } else { 1000 ResourceMark rm; 1001 const char* sigstr = k->signature_name(); 1002 int siglen = (int) strlen(sigstr); 1003 if (!intern_if_not_found) { 1004 name = SymbolTable::probe(sigstr, siglen); 1005 } else { 1006 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1007 } 1008 } 1009 } 1010 return name; 1011 } 1012 1013 // Returns the Java name for this Java mirror (Resource allocated) 1014 // See Klass::external_name(). 1015 // For primitive type Java mirrors, its type name is returned. 1016 const char* java_lang_Class::as_external_name(oop java_class) { 1017 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1018 const char* name = NULL; 1019 if (is_primitive(java_class)) { 1020 name = type2name(primitive_type(java_class)); 1021 } else { 1022 name = as_Klass(java_class)->external_name(); 1023 } 1024 if (name == NULL) { 1025 name = "<null>"; 1026 } 1027 return name; 1028 } 1029 1030 Klass* java_lang_Class::array_klass(oop java_class) { 1031 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1032 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1033 return k; 1034 } 1035 1036 1037 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1038 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1039 java_class->metadata_field_put(_array_klass_offset, klass); 1040 } 1041 1042 1043 bool java_lang_Class::is_primitive(oop java_class) { 1044 // should assert: 1045 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1046 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1047 1048 #ifdef ASSERT 1049 if (is_primitive) { 1050 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1051 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1052 "Should be either the T_VOID primitive or a java primitive"); 1053 } 1054 #endif 1055 1056 return is_primitive; 1057 } 1058 1059 1060 BasicType java_lang_Class::primitive_type(oop java_class) { 1061 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1062 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1063 BasicType type = T_VOID; 1064 if (ak != NULL) { 1065 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1066 type = ArrayKlass::cast(ak)->element_type(); 1067 } else { 1068 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1069 } 1070 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1071 return type; 1072 } 1073 1074 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1075 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1076 if (is_primitive(java_class)) { 1077 if (reference_klass != NULL) 1078 (*reference_klass) = NULL; 1079 return primitive_type(java_class); 1080 } else { 1081 if (reference_klass != NULL) 1082 (*reference_klass) = as_Klass(java_class); 1083 return T_OBJECT; 1084 } 1085 } 1086 1087 1088 oop java_lang_Class::primitive_mirror(BasicType t) { 1089 oop mirror = Universe::java_mirror(t); 1090 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1091 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1092 return mirror; 1093 } 1094 1095 bool java_lang_Class::offsets_computed = false; 1096 int java_lang_Class::classRedefinedCount_offset = -1; 1097 1098 void java_lang_Class::compute_offsets() { 1099 assert(!offsets_computed, "offsets should be initialized only once"); 1100 offsets_computed = true; 1101 1102 Klass* k = SystemDictionary::Class_klass(); 1103 // The classRedefinedCount field is only present starting in 1.5, 1104 // so don't go fatal. 1105 compute_optional_offset(classRedefinedCount_offset, 1106 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1107 1108 // Needs to be optional because the old build runs Queens during bootstrapping 1109 // and jdk8-9 doesn't have coordinated pushes yet. 1110 compute_optional_offset(_class_loader_offset, 1111 k, vmSymbols::classLoader_name(), 1112 vmSymbols::classloader_signature()); 1113 1114 compute_offset(_component_mirror_offset, 1115 k, vmSymbols::componentType_name(), 1116 vmSymbols::class_signature()); 1117 1118 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1119 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1120 // GC treats them the same. 1121 _init_lock_offset = _component_mirror_offset; 1122 1123 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1124 } 1125 1126 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1127 if (classRedefinedCount_offset == -1) { 1128 // If we don't have an offset for it then just return -1 as a marker. 1129 return -1; 1130 } 1131 1132 return the_class_mirror->int_field(classRedefinedCount_offset); 1133 } 1134 1135 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1136 if (classRedefinedCount_offset == -1) { 1137 // If we don't have an offset for it then nothing to set. 1138 return; 1139 } 1140 1141 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1142 } 1143 1144 1145 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1146 // platform thread structure, and a eetop offset which was used for thread 1147 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1148 // merged, so in the HotSpot VM we just use the eetop field for the thread 1149 // instead of the privateInfo_offset. 1150 // 1151 // Note: The stackSize field is only present starting in 1.4. 1152 1153 int java_lang_Thread::_name_offset = 0; 1154 int java_lang_Thread::_group_offset = 0; 1155 int java_lang_Thread::_contextClassLoader_offset = 0; 1156 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1157 int java_lang_Thread::_priority_offset = 0; 1158 int java_lang_Thread::_eetop_offset = 0; 1159 int java_lang_Thread::_daemon_offset = 0; 1160 int java_lang_Thread::_stillborn_offset = 0; 1161 int java_lang_Thread::_stackSize_offset = 0; 1162 int java_lang_Thread::_tid_offset = 0; 1163 int java_lang_Thread::_thread_status_offset = 0; 1164 int java_lang_Thread::_park_blocker_offset = 0; 1165 int java_lang_Thread::_park_event_offset = 0 ; 1166 1167 1168 void java_lang_Thread::compute_offsets() { 1169 assert(_group_offset == 0, "offsets should be initialized only once"); 1170 1171 Klass* k = SystemDictionary::Thread_klass(); 1172 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1173 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1174 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1175 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1176 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1177 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1178 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1179 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1180 // The stackSize field is only present starting in 1.4, so don't go fatal. 1181 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1182 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1183 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1184 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1185 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1186 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1187 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1188 vmSymbols::long_signature()); 1189 } 1190 1191 1192 JavaThread* java_lang_Thread::thread(oop java_thread) { 1193 return (JavaThread*)java_thread->address_field(_eetop_offset); 1194 } 1195 1196 1197 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1198 java_thread->address_field_put(_eetop_offset, (address)thread); 1199 } 1200 1201 1202 oop java_lang_Thread::name(oop java_thread) { 1203 return java_thread->obj_field(_name_offset); 1204 } 1205 1206 1207 void java_lang_Thread::set_name(oop java_thread, oop name) { 1208 java_thread->obj_field_put(_name_offset, name); 1209 } 1210 1211 1212 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1213 return (ThreadPriority)java_thread->int_field(_priority_offset); 1214 } 1215 1216 1217 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1218 java_thread->int_field_put(_priority_offset, priority); 1219 } 1220 1221 1222 oop java_lang_Thread::threadGroup(oop java_thread) { 1223 return java_thread->obj_field(_group_offset); 1224 } 1225 1226 1227 bool java_lang_Thread::is_stillborn(oop java_thread) { 1228 return java_thread->bool_field(_stillborn_offset) != 0; 1229 } 1230 1231 1232 // We never have reason to turn the stillborn bit off 1233 void java_lang_Thread::set_stillborn(oop java_thread) { 1234 java_thread->bool_field_put(_stillborn_offset, true); 1235 } 1236 1237 1238 bool java_lang_Thread::is_alive(oop java_thread) { 1239 JavaThread* thr = java_lang_Thread::thread(java_thread); 1240 return (thr != NULL); 1241 } 1242 1243 1244 bool java_lang_Thread::is_daemon(oop java_thread) { 1245 return java_thread->bool_field(_daemon_offset) != 0; 1246 } 1247 1248 1249 void java_lang_Thread::set_daemon(oop java_thread) { 1250 java_thread->bool_field_put(_daemon_offset, true); 1251 } 1252 1253 oop java_lang_Thread::context_class_loader(oop java_thread) { 1254 return java_thread->obj_field(_contextClassLoader_offset); 1255 } 1256 1257 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1258 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1259 } 1260 1261 1262 jlong java_lang_Thread::stackSize(oop java_thread) { 1263 if (_stackSize_offset > 0) { 1264 return java_thread->long_field(_stackSize_offset); 1265 } else { 1266 return 0; 1267 } 1268 } 1269 1270 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1271 void java_lang_Thread::set_thread_status(oop java_thread, 1272 java_lang_Thread::ThreadStatus status) { 1273 // The threadStatus is only present starting in 1.5 1274 if (_thread_status_offset > 0) { 1275 java_thread->int_field_put(_thread_status_offset, status); 1276 } 1277 } 1278 1279 // Read thread status value from threadStatus field in java.lang.Thread java class. 1280 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1281 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1282 JavaThread::current()->thread_state() == _thread_in_vm, 1283 "Java Thread is not running in vm"); 1284 // The threadStatus is only present starting in 1.5 1285 if (_thread_status_offset > 0) { 1286 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1287 } else { 1288 // All we can easily figure out is if it is alive, but that is 1289 // enough info for a valid unknown status. 1290 // These aren't restricted to valid set ThreadStatus values, so 1291 // use JVMTI values and cast. 1292 JavaThread* thr = java_lang_Thread::thread(java_thread); 1293 if (thr == NULL) { 1294 // the thread hasn't run yet or is in the process of exiting 1295 return NEW; 1296 } 1297 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1298 } 1299 } 1300 1301 1302 jlong java_lang_Thread::thread_id(oop java_thread) { 1303 // The thread ID field is only present starting in 1.5 1304 if (_tid_offset > 0) { 1305 return java_thread->long_field(_tid_offset); 1306 } else { 1307 return 0; 1308 } 1309 } 1310 1311 oop java_lang_Thread::park_blocker(oop java_thread) { 1312 assert(JDK_Version::current().supports_thread_park_blocker() && 1313 _park_blocker_offset != 0, "Must support parkBlocker field"); 1314 1315 if (_park_blocker_offset > 0) { 1316 return java_thread->obj_field(_park_blocker_offset); 1317 } 1318 1319 return NULL; 1320 } 1321 1322 jlong java_lang_Thread::park_event(oop java_thread) { 1323 if (_park_event_offset > 0) { 1324 return java_thread->long_field(_park_event_offset); 1325 } 1326 return 0; 1327 } 1328 1329 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1330 if (_park_event_offset > 0) { 1331 java_thread->long_field_put(_park_event_offset, ptr); 1332 return true; 1333 } 1334 return false; 1335 } 1336 1337 1338 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1339 assert(_thread_status_offset != 0, "Must have thread status"); 1340 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1341 switch (status) { 1342 case NEW : return "NEW"; 1343 case RUNNABLE : return "RUNNABLE"; 1344 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1345 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1346 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1347 case PARKED : return "WAITING (parking)"; 1348 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1349 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1350 case TERMINATED : return "TERMINATED"; 1351 default : return "UNKNOWN"; 1352 }; 1353 } 1354 int java_lang_ThreadGroup::_parent_offset = 0; 1355 int java_lang_ThreadGroup::_name_offset = 0; 1356 int java_lang_ThreadGroup::_threads_offset = 0; 1357 int java_lang_ThreadGroup::_groups_offset = 0; 1358 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1359 int java_lang_ThreadGroup::_destroyed_offset = 0; 1360 int java_lang_ThreadGroup::_daemon_offset = 0; 1361 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1362 int java_lang_ThreadGroup::_nthreads_offset = 0; 1363 int java_lang_ThreadGroup::_ngroups_offset = 0; 1364 1365 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1366 assert(java_thread_group->is_oop(), "thread group must be oop"); 1367 return java_thread_group->obj_field(_parent_offset); 1368 } 1369 1370 // ("name as oop" accessor is not necessary) 1371 1372 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1373 oop name = java_thread_group->obj_field(_name_offset); 1374 // ThreadGroup.name can be null 1375 if (name != NULL) { 1376 return java_lang_String::as_utf8_string(name); 1377 } 1378 return NULL; 1379 } 1380 1381 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1382 assert(java_thread_group->is_oop(), "thread group must be oop"); 1383 return java_thread_group->int_field(_nthreads_offset); 1384 } 1385 1386 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1387 oop threads = java_thread_group->obj_field(_threads_offset); 1388 assert(threads != NULL, "threadgroups should have threads"); 1389 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1390 return objArrayOop(threads); 1391 } 1392 1393 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1394 assert(java_thread_group->is_oop(), "thread group must be oop"); 1395 return java_thread_group->int_field(_ngroups_offset); 1396 } 1397 1398 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1399 oop groups = java_thread_group->obj_field(_groups_offset); 1400 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1401 return objArrayOop(groups); 1402 } 1403 1404 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1405 assert(java_thread_group->is_oop(), "thread group must be oop"); 1406 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1407 } 1408 1409 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1410 assert(java_thread_group->is_oop(), "thread group must be oop"); 1411 return java_thread_group->bool_field(_destroyed_offset) != 0; 1412 } 1413 1414 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1415 assert(java_thread_group->is_oop(), "thread group must be oop"); 1416 return java_thread_group->bool_field(_daemon_offset) != 0; 1417 } 1418 1419 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1420 assert(java_thread_group->is_oop(), "thread group must be oop"); 1421 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1422 } 1423 1424 void java_lang_ThreadGroup::compute_offsets() { 1425 assert(_parent_offset == 0, "offsets should be initialized only once"); 1426 1427 Klass* k = SystemDictionary::ThreadGroup_klass(); 1428 1429 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1430 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1431 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1432 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1433 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1434 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1435 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1436 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1437 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1438 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1439 } 1440 1441 oop java_lang_Throwable::unassigned_stacktrace() { 1442 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1443 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1444 if (UseCompressedOops) { 1445 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1446 } else { 1447 return oopDesc::load_decode_heap_oop((oop*)addr); 1448 } 1449 } 1450 1451 oop java_lang_Throwable::backtrace(oop throwable) { 1452 return throwable->obj_field_acquire(backtrace_offset); 1453 } 1454 1455 1456 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1457 throwable->release_obj_field_put(backtrace_offset, value); 1458 } 1459 1460 1461 oop java_lang_Throwable::message(oop throwable) { 1462 return throwable->obj_field(detailMessage_offset); 1463 } 1464 1465 1466 oop java_lang_Throwable::message(Handle throwable) { 1467 return throwable->obj_field(detailMessage_offset); 1468 } 1469 1470 1471 // Return Symbol for detailed_message or NULL 1472 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1473 PRESERVE_EXCEPTION_MARK; // Keep original exception 1474 oop detailed_message = java_lang_Throwable::message(throwable); 1475 if (detailed_message != NULL) { 1476 return java_lang_String::as_symbol(detailed_message, THREAD); 1477 } 1478 return NULL; 1479 } 1480 1481 void java_lang_Throwable::set_message(oop throwable, oop value) { 1482 throwable->obj_field_put(detailMessage_offset, value); 1483 } 1484 1485 1486 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1487 throwable->obj_field_put(stackTrace_offset, st_element_array); 1488 } 1489 1490 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1491 set_stacktrace(throwable, NULL); 1492 } 1493 1494 1495 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1496 ResourceMark rm; 1497 Klass* k = throwable->klass(); 1498 assert(k != NULL, "just checking"); 1499 st->print("%s", k->external_name()); 1500 oop msg = message(throwable); 1501 if (msg != NULL) { 1502 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1503 } 1504 } 1505 1506 1507 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1508 ResourceMark rm; 1509 Klass* k = throwable->klass(); 1510 assert(k != NULL, "just checking"); 1511 st->print("%s", k->external_name()); 1512 oop msg = message(throwable); 1513 if (msg != NULL) { 1514 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1515 } 1516 } 1517 1518 // After this many redefines, the stack trace is unreliable. 1519 const int MAX_VERSION = USHRT_MAX; 1520 1521 // Helper backtrace functions to store bci|version together. 1522 static inline int merge_bci_and_version(int bci, int version) { 1523 // only store u2 for version, checking for overflow. 1524 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1525 assert((jushort)bci == bci, "bci should be short"); 1526 return build_int_from_shorts(version, bci); 1527 } 1528 1529 static inline int bci_at(unsigned int merged) { 1530 return extract_high_short_from_int(merged); 1531 } 1532 static inline int version_at(unsigned int merged) { 1533 return extract_low_short_from_int(merged); 1534 } 1535 1536 static inline bool version_matches(Method* method, int version) { 1537 assert(version < MAX_VERSION, "version is too big"); 1538 return method != NULL && (method->constants()->version() == version); 1539 } 1540 1541 static inline int get_line_number(Method* method, int bci) { 1542 int line_number = 0; 1543 if (method->is_native()) { 1544 // Negative value different from -1 below, enabling Java code in 1545 // class java.lang.StackTraceElement to distinguish "native" from 1546 // "no LineNumberTable". JDK tests for -2. 1547 line_number = -2; 1548 } else { 1549 // Returns -1 if no LineNumberTable, and otherwise actual line number 1550 line_number = method->line_number_from_bci(bci); 1551 if (line_number == -1 && ShowHiddenFrames) { 1552 line_number = bci + 1000000; 1553 } 1554 } 1555 return line_number; 1556 } 1557 1558 // This class provides a simple wrapper over the internal structure of 1559 // exception backtrace to insulate users of the backtrace from needing 1560 // to know what it looks like. 1561 class BacktraceBuilder: public StackObj { 1562 private: 1563 Handle _backtrace; 1564 objArrayOop _head; 1565 typeArrayOop _methods; 1566 typeArrayOop _bcis; 1567 objArrayOop _mirrors; 1568 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1569 int _index; 1570 No_Safepoint_Verifier _nsv; 1571 1572 public: 1573 1574 enum { 1575 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1576 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1577 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1578 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1579 trace_next_offset = java_lang_Throwable::trace_next_offset, 1580 trace_size = java_lang_Throwable::trace_size, 1581 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1582 }; 1583 1584 // get info out of chunks 1585 static typeArrayOop get_methods(objArrayHandle chunk) { 1586 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1587 assert(methods != NULL, "method array should be initialized in backtrace"); 1588 return methods; 1589 } 1590 static typeArrayOop get_bcis(objArrayHandle chunk) { 1591 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1592 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1593 return bcis; 1594 } 1595 static objArrayOop get_mirrors(objArrayHandle chunk) { 1596 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1597 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1598 return mirrors; 1599 } 1600 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1601 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1602 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1603 return cprefs; 1604 } 1605 1606 // constructor for new backtrace 1607 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1608 expand(CHECK); 1609 _backtrace = _head; 1610 _index = 0; 1611 } 1612 1613 BacktraceBuilder(objArrayHandle backtrace) { 1614 _methods = get_methods(backtrace); 1615 _bcis = get_bcis(backtrace); 1616 _mirrors = get_mirrors(backtrace); 1617 _cprefs = get_cprefs(backtrace); 1618 assert(_methods->length() == _bcis->length() && 1619 _methods->length() == _mirrors->length(), 1620 "method and source information arrays should match"); 1621 1622 // head is the preallocated backtrace 1623 _backtrace = _head = backtrace(); 1624 _index = 0; 1625 } 1626 1627 void expand(TRAPS) { 1628 objArrayHandle old_head(THREAD, _head); 1629 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1630 1631 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1632 objArrayHandle new_head(THREAD, head); 1633 1634 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1635 typeArrayHandle new_methods(THREAD, methods); 1636 1637 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1638 typeArrayHandle new_bcis(THREAD, bcis); 1639 1640 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1641 objArrayHandle new_mirrors(THREAD, mirrors); 1642 1643 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1644 typeArrayHandle new_cprefs(THREAD, cprefs); 1645 1646 if (!old_head.is_null()) { 1647 old_head->obj_at_put(trace_next_offset, new_head()); 1648 } 1649 new_head->obj_at_put(trace_methods_offset, new_methods()); 1650 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1651 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1652 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1653 1654 _head = new_head(); 1655 _methods = new_methods(); 1656 _bcis = new_bcis(); 1657 _mirrors = new_mirrors(); 1658 _cprefs = new_cprefs(); 1659 _index = 0; 1660 } 1661 1662 oop backtrace() { 1663 return _backtrace(); 1664 } 1665 1666 inline void push(Method* method, int bci, TRAPS) { 1667 // Smear the -1 bci to 0 since the array only holds unsigned 1668 // shorts. The later line number lookup would just smear the -1 1669 // to a 0 even if it could be recorded. 1670 if (bci == SynchronizationEntryBCI) bci = 0; 1671 1672 if (_index >= trace_chunk_size) { 1673 methodHandle mhandle(THREAD, method); 1674 expand(CHECK); 1675 method = mhandle(); 1676 } 1677 1678 _methods->short_at_put(_index, method->orig_method_idnum()); 1679 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1680 _cprefs->short_at_put(_index, method->name_index()); 1681 1682 // We need to save the mirrors in the backtrace to keep the class 1683 // from being unloaded while we still have this stack trace. 1684 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1685 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1686 _index++; 1687 } 1688 1689 }; 1690 1691 Symbol* get_source_file_name(InstanceKlass* holder, int version) { 1692 // Find the specific ik version that contains this source_file_name_index 1693 // via the previous versions list, but use the current version's 1694 // constant pool to look it up. The previous version's index has been 1695 // merged for the current constant pool. 1696 InstanceKlass* ik = holder->get_klass_version(version); 1697 // This version has been cleaned up. 1698 if (ik == NULL) return NULL; 1699 int source_file_name_index = ik->source_file_name_index(); 1700 return (source_file_name_index == 0) ? 1701 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index); 1702 } 1703 1704 // Print stack trace element to resource allocated buffer 1705 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1706 int method_id, int version, int bci, int cpref) { 1707 1708 // Get strings and string lengths 1709 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1710 const char* klass_name = holder->external_name(); 1711 int buf_len = (int)strlen(klass_name); 1712 1713 Method* method = holder->method_with_orig_idnum(method_id, version); 1714 1715 // The method can be NULL if the requested class version is gone 1716 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1717 char* method_name = sym->as_C_string(); 1718 buf_len += (int)strlen(method_name); 1719 1720 char* source_file_name = NULL; 1721 Symbol* source = get_source_file_name(holder, version); 1722 if (source != NULL) { 1723 source_file_name = source->as_C_string(); 1724 buf_len += (int)strlen(source_file_name); 1725 } 1726 1727 // Allocate temporary buffer with extra space for formatting and line number 1728 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1729 1730 // Print stack trace line in buffer 1731 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1732 1733 if (!version_matches(method, version)) { 1734 strcat(buf, "(Redefined)"); 1735 } else { 1736 int line_number = get_line_number(method, bci); 1737 if (line_number == -2) { 1738 strcat(buf, "(Native Method)"); 1739 } else { 1740 if (source_file_name != NULL && (line_number != -1)) { 1741 // Sourcename and linenumber 1742 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1743 } else if (source_file_name != NULL) { 1744 // Just sourcename 1745 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1746 } else { 1747 // Neither sourcename nor linenumber 1748 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1749 } 1750 nmethod* nm = method->code(); 1751 if (WizardMode && nm != NULL) { 1752 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1753 } 1754 } 1755 } 1756 1757 return buf; 1758 } 1759 1760 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1761 int method_id, int version, int bci, int cpref) { 1762 ResourceMark rm; 1763 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1764 st->print_cr("%s", buf); 1765 } 1766 1767 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1768 Handle mirror = method->method_holder()->java_mirror(); 1769 int method_id = method->orig_method_idnum(); 1770 int version = method->constants()->version(); 1771 int cpref = method->name_index(); 1772 print_stack_element(st, mirror, method_id, version, bci, cpref); 1773 } 1774 1775 const char* java_lang_Throwable::no_stack_trace_message() { 1776 return "\t<<no stack trace available>>"; 1777 } 1778 1779 1780 // Currently used only for exceptions occurring during startup 1781 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1782 Thread *THREAD = Thread::current(); 1783 Handle h_throwable(THREAD, throwable); 1784 while (h_throwable.not_null()) { 1785 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1786 if (result.is_null()) { 1787 st->print_raw_cr(no_stack_trace_message()); 1788 return; 1789 } 1790 1791 while (result.not_null()) { 1792 1793 // Get method id, bci, version and mirror from chunk 1794 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1795 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1796 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1797 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1798 1799 int length = methods()->length(); 1800 for (int index = 0; index < length; index++) { 1801 Handle mirror(THREAD, mirrors->obj_at(index)); 1802 // NULL mirror means end of stack trace 1803 if (mirror.is_null()) goto handle_cause; 1804 int method = methods->short_at(index); 1805 int version = version_at(bcis->int_at(index)); 1806 int bci = bci_at(bcis->int_at(index)); 1807 int cpref = cprefs->short_at(index); 1808 print_stack_element(st, mirror, method, version, bci, cpref); 1809 } 1810 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1811 } 1812 handle_cause: 1813 { 1814 EXCEPTION_MARK; 1815 JavaValue cause(T_OBJECT); 1816 JavaCalls::call_virtual(&cause, 1817 h_throwable, 1818 KlassHandle(THREAD, h_throwable->klass()), 1819 vmSymbols::getCause_name(), 1820 vmSymbols::void_throwable_signature(), 1821 THREAD); 1822 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1823 if (HAS_PENDING_EXCEPTION) { 1824 CLEAR_PENDING_EXCEPTION; 1825 h_throwable = Handle(); 1826 } else { 1827 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1828 if (h_throwable.not_null()) { 1829 st->print("Caused by: "); 1830 print(h_throwable, st); 1831 st->cr(); 1832 } 1833 } 1834 } 1835 } 1836 } 1837 1838 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1839 if (!StackTraceInThrowable) return; 1840 ResourceMark rm(THREAD); 1841 1842 // Start out by clearing the backtrace for this object, in case the VM 1843 // runs out of memory while allocating the stack trace 1844 set_backtrace(throwable(), NULL); 1845 // Clear lazily constructed Java level stacktrace if refilling occurs 1846 // This is unnecessary in 1.7+ but harmless 1847 clear_stacktrace(throwable()); 1848 1849 int max_depth = MaxJavaStackTraceDepth; 1850 JavaThread* thread = (JavaThread*)THREAD; 1851 BacktraceBuilder bt(CHECK); 1852 1853 // If there is no Java frame just return the method that was being called 1854 // with bci 0 1855 if (!thread->has_last_Java_frame()) { 1856 if (max_depth >= 1 && method() != NULL) { 1857 bt.push(method(), 0, CHECK); 1858 set_backtrace(throwable(), bt.backtrace()); 1859 } 1860 return; 1861 } 1862 1863 // Instead of using vframe directly, this version of fill_in_stack_trace 1864 // basically handles everything by hand. This significantly improved the 1865 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1866 // See bug 6333838 for more details. 1867 // The "ASSERT" here is to verify this method generates the exactly same stack 1868 // trace as utilizing vframe. 1869 #ifdef ASSERT 1870 vframeStream st(thread); 1871 methodHandle st_method(THREAD, st.method()); 1872 #endif 1873 int total_count = 0; 1874 RegisterMap map(thread, false); 1875 int decode_offset = 0; 1876 nmethod* nm = NULL; 1877 bool skip_fillInStackTrace_check = false; 1878 bool skip_throwableInit_check = false; 1879 bool skip_hidden = !ShowHiddenFrames; 1880 1881 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1882 Method* method = NULL; 1883 int bci = 0; 1884 1885 // Compiled java method case. 1886 if (decode_offset != 0) { 1887 DebugInfoReadStream stream(nm, decode_offset); 1888 decode_offset = stream.read_int(); 1889 method = (Method*)nm->metadata_at(stream.read_int()); 1890 bci = stream.read_bci(); 1891 } else { 1892 if (fr.is_first_frame()) break; 1893 address pc = fr.pc(); 1894 if (fr.is_interpreted_frame()) { 1895 address bcp = fr.interpreter_frame_bcp(); 1896 method = fr.interpreter_frame_method(); 1897 bci = method->bci_from(bcp); 1898 fr = fr.sender(&map); 1899 } else { 1900 CodeBlob* cb = fr.cb(); 1901 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1902 // but non nmethod 1903 fr = fr.sender(&map); 1904 if (cb == NULL || !cb->is_nmethod()) { 1905 continue; 1906 } 1907 nm = (nmethod*)cb; 1908 if (nm->method()->is_native()) { 1909 method = nm->method(); 1910 bci = 0; 1911 } else { 1912 PcDesc* pd = nm->pc_desc_at(pc); 1913 decode_offset = pd->scope_decode_offset(); 1914 // if decode_offset is not equal to 0, it will execute the 1915 // "compiled java method case" at the beginning of the loop. 1916 continue; 1917 } 1918 } 1919 } 1920 #ifdef ASSERT 1921 assert(st_method() == method && st.bci() == bci, 1922 "Wrong stack trace"); 1923 st.next(); 1924 // vframeStream::method isn't GC-safe so store off a copy 1925 // of the Method* in case we GC. 1926 if (!st.at_end()) { 1927 st_method = st.method(); 1928 } 1929 #endif 1930 1931 // the format of the stacktrace will be: 1932 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1933 // - 0 or more <init> methods for the exception class (skipped) 1934 // - rest of the stack 1935 1936 if (!skip_fillInStackTrace_check) { 1937 if (method->name() == vmSymbols::fillInStackTrace_name() && 1938 throwable->is_a(method->method_holder())) { 1939 continue; 1940 } 1941 else { 1942 skip_fillInStackTrace_check = true; // gone past them all 1943 } 1944 } 1945 if (!skip_throwableInit_check) { 1946 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1947 1948 // skip <init> methods of the exception class and superclasses 1949 // This is simlar to classic VM. 1950 if (method->name() == vmSymbols::object_initializer_name() && 1951 throwable->is_a(method->method_holder())) { 1952 continue; 1953 } else { 1954 // there are none or we've seen them all - either way stop checking 1955 skip_throwableInit_check = true; 1956 } 1957 } 1958 if (method->is_hidden()) { 1959 if (skip_hidden) continue; 1960 } 1961 bt.push(method, bci, CHECK); 1962 total_count++; 1963 } 1964 1965 // Put completed stack trace into throwable object 1966 set_backtrace(throwable(), bt.backtrace()); 1967 } 1968 1969 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 1970 // No-op if stack trace is disabled 1971 if (!StackTraceInThrowable) { 1972 return; 1973 } 1974 1975 // Disable stack traces for some preallocated out of memory errors 1976 if (!Universe::should_fill_in_stack_trace(throwable)) { 1977 return; 1978 } 1979 1980 PRESERVE_EXCEPTION_MARK; 1981 1982 JavaThread* thread = JavaThread::active(); 1983 fill_in_stack_trace(throwable, method, thread); 1984 // ignore exceptions thrown during stack trace filling 1985 CLEAR_PENDING_EXCEPTION; 1986 } 1987 1988 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1989 // Allocate stack trace - backtrace is created but not filled in 1990 1991 // No-op if stack trace is disabled 1992 if (!StackTraceInThrowable) return; 1993 BacktraceBuilder bt(CHECK); // creates a backtrace 1994 set_backtrace(throwable(), bt.backtrace()); 1995 } 1996 1997 1998 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1999 // Fill in stack trace into preallocated backtrace (no GC) 2000 2001 // No-op if stack trace is disabled 2002 if (!StackTraceInThrowable) return; 2003 2004 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2005 2006 JavaThread* THREAD = JavaThread::current(); 2007 2008 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2009 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2010 2011 ResourceMark rm(THREAD); 2012 vframeStream st(THREAD); 2013 2014 BacktraceBuilder bt(backtrace); 2015 2016 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2017 // methods as preallocated errors aren't created by "java" code. 2018 2019 // fill in as much stack trace as possible 2020 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 2021 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 2022 int chunk_count = 0; 2023 2024 for (;!st.at_end(); st.next()) { 2025 bt.push(st.method(), st.bci(), CHECK); 2026 chunk_count++; 2027 2028 // Bail-out for deep stacks 2029 if (chunk_count >= max_chunks) break; 2030 } 2031 2032 // We support the Throwable immutability protocol defined for Java 7. 2033 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2034 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2035 } 2036 2037 2038 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 2039 if (throwable == NULL) { 2040 THROW_0(vmSymbols::java_lang_NullPointerException()); 2041 } 2042 objArrayOop chunk = objArrayOop(backtrace(throwable)); 2043 int depth = 0; 2044 if (chunk != NULL) { 2045 // Iterate over chunks and count full ones 2046 while (true) { 2047 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 2048 if (next == NULL) break; 2049 depth += trace_chunk_size; 2050 chunk = next; 2051 } 2052 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 2053 // Count element in remaining partial chunk. NULL value for mirror 2054 // marks the end of the stack trace elements that are saved. 2055 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2056 assert(mirrors != NULL, "sanity check"); 2057 for (int i = 0; i < mirrors->length(); i++) { 2058 if (mirrors->obj_at(i) == NULL) break; 2059 depth++; 2060 } 2061 } 2062 return depth; 2063 } 2064 2065 2066 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 2067 if (throwable == NULL) { 2068 THROW_0(vmSymbols::java_lang_NullPointerException()); 2069 } 2070 if (index < 0) { 2071 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2072 } 2073 // Compute how many chunks to skip and index into actual chunk 2074 objArrayOop chunk = objArrayOop(backtrace(throwable)); 2075 int skip_chunks = index / trace_chunk_size; 2076 int chunk_index = index % trace_chunk_size; 2077 while (chunk != NULL && skip_chunks > 0) { 2078 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 2079 skip_chunks--; 2080 } 2081 if (chunk == NULL) { 2082 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2083 } 2084 // Get method id, bci, version, mirror and cpref from chunk 2085 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 2086 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 2087 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2088 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 2089 2090 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 2091 2092 int method = methods->short_at(chunk_index); 2093 int version = version_at(bcis->int_at(chunk_index)); 2094 int bci = bci_at(bcis->int_at(chunk_index)); 2095 int cpref = cprefs->short_at(chunk_index); 2096 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 2097 2098 // Chunk can be partial full 2099 if (mirror.is_null()) { 2100 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2101 } 2102 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 2103 return element; 2104 } 2105 2106 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 2107 int version, int bci, int cpref, TRAPS) { 2108 // Allocate java.lang.StackTraceElement instance 2109 Klass* k = SystemDictionary::StackTraceElement_klass(); 2110 assert(k != NULL, "must be loaded in 1.4+"); 2111 instanceKlassHandle ik (THREAD, k); 2112 if (ik->should_be_initialized()) { 2113 ik->initialize(CHECK_0); 2114 } 2115 2116 Handle element = ik->allocate_instance_handle(CHECK_0); 2117 // Fill in class name 2118 ResourceMark rm(THREAD); 2119 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2120 const char* str = holder->external_name(); 2121 oop classname = StringTable::intern((char*) str, CHECK_0); 2122 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2123 2124 Method* method = holder->method_with_orig_idnum(method_id, version); 2125 2126 // The method can be NULL if the requested class version is gone 2127 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2128 2129 // Fill in method name 2130 oop methodname = StringTable::intern(sym, CHECK_0); 2131 java_lang_StackTraceElement::set_methodName(element(), methodname); 2132 2133 if (!version_matches(method, version)) { 2134 // The method was redefined, accurate line number information isn't available 2135 java_lang_StackTraceElement::set_fileName(element(), NULL); 2136 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2137 } else { 2138 // Fill in source file name and line number. 2139 Symbol* source = get_source_file_name(holder, version); 2140 if (ShowHiddenFrames && source == NULL) 2141 source = vmSymbols::unknown_class_name(); 2142 oop filename = StringTable::intern(source, CHECK_0); 2143 java_lang_StackTraceElement::set_fileName(element(), filename); 2144 2145 int line_number = get_line_number(method, bci); 2146 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2147 } 2148 return element(); 2149 } 2150 2151 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2152 Handle mirror (THREAD, method->method_holder()->java_mirror()); 2153 int method_id = method->orig_method_idnum(); 2154 int cpref = method->name_index(); 2155 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 2156 } 2157 2158 void java_lang_reflect_AccessibleObject::compute_offsets() { 2159 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2160 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2161 } 2162 2163 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2165 return (jboolean) reflect->bool_field(override_offset); 2166 } 2167 2168 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2170 reflect->bool_field_put(override_offset, (int) value); 2171 } 2172 2173 void java_lang_reflect_Method::compute_offsets() { 2174 Klass* k = SystemDictionary::reflect_Method_klass(); 2175 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2176 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2177 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2178 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2179 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2180 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2181 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2182 // The generic signature and annotations fields are only present in 1.5 2183 signature_offset = -1; 2184 annotations_offset = -1; 2185 parameter_annotations_offset = -1; 2186 annotation_default_offset = -1; 2187 type_annotations_offset = -1; 2188 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2189 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2190 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2191 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2192 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2193 } 2194 2195 Handle java_lang_reflect_Method::create(TRAPS) { 2196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2197 Klass* klass = SystemDictionary::reflect_Method_klass(); 2198 // This class is eagerly initialized during VM initialization, since we keep a refence 2199 // to one of the methods 2200 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2201 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2202 } 2203 2204 oop java_lang_reflect_Method::clazz(oop reflect) { 2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2206 return reflect->obj_field(clazz_offset); 2207 } 2208 2209 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2211 reflect->obj_field_put(clazz_offset, value); 2212 } 2213 2214 int java_lang_reflect_Method::slot(oop reflect) { 2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2216 return reflect->int_field(slot_offset); 2217 } 2218 2219 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2221 reflect->int_field_put(slot_offset, value); 2222 } 2223 2224 oop java_lang_reflect_Method::name(oop method) { 2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2226 return method->obj_field(name_offset); 2227 } 2228 2229 void java_lang_reflect_Method::set_name(oop method, oop value) { 2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2231 method->obj_field_put(name_offset, value); 2232 } 2233 2234 oop java_lang_reflect_Method::return_type(oop method) { 2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2236 return method->obj_field(returnType_offset); 2237 } 2238 2239 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2241 method->obj_field_put(returnType_offset, value); 2242 } 2243 2244 oop java_lang_reflect_Method::parameter_types(oop method) { 2245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2246 return method->obj_field(parameterTypes_offset); 2247 } 2248 2249 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2251 method->obj_field_put(parameterTypes_offset, value); 2252 } 2253 2254 oop java_lang_reflect_Method::exception_types(oop method) { 2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2256 return method->obj_field(exceptionTypes_offset); 2257 } 2258 2259 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2260 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2261 method->obj_field_put(exceptionTypes_offset, value); 2262 } 2263 2264 int java_lang_reflect_Method::modifiers(oop method) { 2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2266 return method->int_field(modifiers_offset); 2267 } 2268 2269 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2271 method->int_field_put(modifiers_offset, value); 2272 } 2273 2274 bool java_lang_reflect_Method::has_signature_field() { 2275 return (signature_offset >= 0); 2276 } 2277 2278 oop java_lang_reflect_Method::signature(oop method) { 2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2280 assert(has_signature_field(), "signature field must be present"); 2281 return method->obj_field(signature_offset); 2282 } 2283 2284 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 assert(has_signature_field(), "signature field must be present"); 2287 method->obj_field_put(signature_offset, value); 2288 } 2289 2290 bool java_lang_reflect_Method::has_annotations_field() { 2291 return (annotations_offset >= 0); 2292 } 2293 2294 oop java_lang_reflect_Method::annotations(oop method) { 2295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2296 assert(has_annotations_field(), "annotations field must be present"); 2297 return method->obj_field(annotations_offset); 2298 } 2299 2300 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 assert(has_annotations_field(), "annotations field must be present"); 2303 method->obj_field_put(annotations_offset, value); 2304 } 2305 2306 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2307 return (parameter_annotations_offset >= 0); 2308 } 2309 2310 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2313 return method->obj_field(parameter_annotations_offset); 2314 } 2315 2316 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2318 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2319 method->obj_field_put(parameter_annotations_offset, value); 2320 } 2321 2322 bool java_lang_reflect_Method::has_annotation_default_field() { 2323 return (annotation_default_offset >= 0); 2324 } 2325 2326 oop java_lang_reflect_Method::annotation_default(oop method) { 2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2328 assert(has_annotation_default_field(), "annotation default field must be present"); 2329 return method->obj_field(annotation_default_offset); 2330 } 2331 2332 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2334 assert(has_annotation_default_field(), "annotation default field must be present"); 2335 method->obj_field_put(annotation_default_offset, value); 2336 } 2337 2338 bool java_lang_reflect_Method::has_type_annotations_field() { 2339 return (type_annotations_offset >= 0); 2340 } 2341 2342 oop java_lang_reflect_Method::type_annotations(oop method) { 2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2344 assert(has_type_annotations_field(), "type_annotations field must be present"); 2345 return method->obj_field(type_annotations_offset); 2346 } 2347 2348 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2350 assert(has_type_annotations_field(), "type_annotations field must be present"); 2351 method->obj_field_put(type_annotations_offset, value); 2352 } 2353 2354 void java_lang_reflect_Constructor::compute_offsets() { 2355 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2356 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2357 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2358 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2359 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2360 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2361 // The generic signature and annotations fields are only present in 1.5 2362 signature_offset = -1; 2363 annotations_offset = -1; 2364 parameter_annotations_offset = -1; 2365 type_annotations_offset = -1; 2366 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2367 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2368 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2369 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2370 } 2371 2372 Handle java_lang_reflect_Constructor::create(TRAPS) { 2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2374 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2375 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2376 instanceKlassHandle klass (THREAD, k); 2377 // Ensure it is initialized 2378 klass->initialize(CHECK_NH); 2379 return klass->allocate_instance_handle(THREAD); 2380 } 2381 2382 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2383 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2384 return reflect->obj_field(clazz_offset); 2385 } 2386 2387 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2389 reflect->obj_field_put(clazz_offset, value); 2390 } 2391 2392 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2394 return constructor->obj_field(parameterTypes_offset); 2395 } 2396 2397 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2399 constructor->obj_field_put(parameterTypes_offset, value); 2400 } 2401 2402 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2403 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2404 return constructor->obj_field(exceptionTypes_offset); 2405 } 2406 2407 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2409 constructor->obj_field_put(exceptionTypes_offset, value); 2410 } 2411 2412 int java_lang_reflect_Constructor::slot(oop reflect) { 2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2414 return reflect->int_field(slot_offset); 2415 } 2416 2417 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2419 reflect->int_field_put(slot_offset, value); 2420 } 2421 2422 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2424 return constructor->int_field(modifiers_offset); 2425 } 2426 2427 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2429 constructor->int_field_put(modifiers_offset, value); 2430 } 2431 2432 bool java_lang_reflect_Constructor::has_signature_field() { 2433 return (signature_offset >= 0); 2434 } 2435 2436 oop java_lang_reflect_Constructor::signature(oop constructor) { 2437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2438 assert(has_signature_field(), "signature field must be present"); 2439 return constructor->obj_field(signature_offset); 2440 } 2441 2442 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 assert(has_signature_field(), "signature field must be present"); 2445 constructor->obj_field_put(signature_offset, value); 2446 } 2447 2448 bool java_lang_reflect_Constructor::has_annotations_field() { 2449 return (annotations_offset >= 0); 2450 } 2451 2452 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2453 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2454 assert(has_annotations_field(), "annotations field must be present"); 2455 return constructor->obj_field(annotations_offset); 2456 } 2457 2458 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 assert(has_annotations_field(), "annotations field must be present"); 2461 constructor->obj_field_put(annotations_offset, value); 2462 } 2463 2464 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2465 return (parameter_annotations_offset >= 0); 2466 } 2467 2468 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2470 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2471 return method->obj_field(parameter_annotations_offset); 2472 } 2473 2474 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2476 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2477 method->obj_field_put(parameter_annotations_offset, value); 2478 } 2479 2480 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2481 return (type_annotations_offset >= 0); 2482 } 2483 2484 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2486 assert(has_type_annotations_field(), "type_annotations field must be present"); 2487 return constructor->obj_field(type_annotations_offset); 2488 } 2489 2490 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2491 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2492 assert(has_type_annotations_field(), "type_annotations field must be present"); 2493 constructor->obj_field_put(type_annotations_offset, value); 2494 } 2495 2496 void java_lang_reflect_Field::compute_offsets() { 2497 Klass* k = SystemDictionary::reflect_Field_klass(); 2498 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2499 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2500 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2501 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2502 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2503 // The generic signature and annotations fields are only present in 1.5 2504 signature_offset = -1; 2505 annotations_offset = -1; 2506 type_annotations_offset = -1; 2507 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2508 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2509 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2510 } 2511 2512 Handle java_lang_reflect_Field::create(TRAPS) { 2513 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2514 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2515 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2516 instanceKlassHandle klass (THREAD, k); 2517 // Ensure it is initialized 2518 klass->initialize(CHECK_NH); 2519 return klass->allocate_instance_handle(THREAD); 2520 } 2521 2522 oop java_lang_reflect_Field::clazz(oop reflect) { 2523 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2524 return reflect->obj_field(clazz_offset); 2525 } 2526 2527 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2528 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2529 reflect->obj_field_put(clazz_offset, value); 2530 } 2531 2532 oop java_lang_reflect_Field::name(oop field) { 2533 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2534 return field->obj_field(name_offset); 2535 } 2536 2537 void java_lang_reflect_Field::set_name(oop field, oop value) { 2538 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2539 field->obj_field_put(name_offset, value); 2540 } 2541 2542 oop java_lang_reflect_Field::type(oop field) { 2543 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2544 return field->obj_field(type_offset); 2545 } 2546 2547 void java_lang_reflect_Field::set_type(oop field, oop value) { 2548 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2549 field->obj_field_put(type_offset, value); 2550 } 2551 2552 int java_lang_reflect_Field::slot(oop reflect) { 2553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2554 return reflect->int_field(slot_offset); 2555 } 2556 2557 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2558 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2559 reflect->int_field_put(slot_offset, value); 2560 } 2561 2562 int java_lang_reflect_Field::modifiers(oop field) { 2563 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2564 return field->int_field(modifiers_offset); 2565 } 2566 2567 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2568 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2569 field->int_field_put(modifiers_offset, value); 2570 } 2571 2572 bool java_lang_reflect_Field::has_signature_field() { 2573 return (signature_offset >= 0); 2574 } 2575 2576 oop java_lang_reflect_Field::signature(oop field) { 2577 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2578 assert(has_signature_field(), "signature field must be present"); 2579 return field->obj_field(signature_offset); 2580 } 2581 2582 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2583 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2584 assert(has_signature_field(), "signature field must be present"); 2585 field->obj_field_put(signature_offset, value); 2586 } 2587 2588 bool java_lang_reflect_Field::has_annotations_field() { 2589 return (annotations_offset >= 0); 2590 } 2591 2592 oop java_lang_reflect_Field::annotations(oop field) { 2593 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2594 assert(has_annotations_field(), "annotations field must be present"); 2595 return field->obj_field(annotations_offset); 2596 } 2597 2598 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2599 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2600 assert(has_annotations_field(), "annotations field must be present"); 2601 field->obj_field_put(annotations_offset, value); 2602 } 2603 2604 bool java_lang_reflect_Field::has_type_annotations_field() { 2605 return (type_annotations_offset >= 0); 2606 } 2607 2608 oop java_lang_reflect_Field::type_annotations(oop field) { 2609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2610 assert(has_type_annotations_field(), "type_annotations field must be present"); 2611 return field->obj_field(type_annotations_offset); 2612 } 2613 2614 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2616 assert(has_type_annotations_field(), "type_annotations field must be present"); 2617 field->obj_field_put(type_annotations_offset, value); 2618 } 2619 2620 void sun_reflect_ConstantPool::compute_offsets() { 2621 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2622 // This null test can be removed post beta 2623 if (k != NULL) { 2624 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2625 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2626 } 2627 } 2628 2629 void java_lang_reflect_Parameter::compute_offsets() { 2630 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2631 if(NULL != k) { 2632 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2633 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2634 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2635 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2636 } 2637 } 2638 2639 Handle java_lang_reflect_Parameter::create(TRAPS) { 2640 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2641 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2642 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2643 instanceKlassHandle klass (THREAD, k); 2644 // Ensure it is initialized 2645 klass->initialize(CHECK_NH); 2646 return klass->allocate_instance_handle(THREAD); 2647 } 2648 2649 oop java_lang_reflect_Parameter::name(oop param) { 2650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2651 return param->obj_field(name_offset); 2652 } 2653 2654 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2656 param->obj_field_put(name_offset, value); 2657 } 2658 2659 int java_lang_reflect_Parameter::modifiers(oop param) { 2660 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2661 return param->int_field(modifiers_offset); 2662 } 2663 2664 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2665 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2666 param->int_field_put(modifiers_offset, value); 2667 } 2668 2669 int java_lang_reflect_Parameter::index(oop param) { 2670 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2671 return param->int_field(index_offset); 2672 } 2673 2674 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2675 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2676 param->int_field_put(index_offset, value); 2677 } 2678 2679 oop java_lang_reflect_Parameter::executable(oop param) { 2680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2681 return param->obj_field(executable_offset); 2682 } 2683 2684 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2686 param->obj_field_put(executable_offset, value); 2687 } 2688 2689 2690 Handle sun_reflect_ConstantPool::create(TRAPS) { 2691 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2692 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2693 instanceKlassHandle klass (THREAD, k); 2694 // Ensure it is initialized 2695 klass->initialize(CHECK_NH); 2696 return klass->allocate_instance_handle(THREAD); 2697 } 2698 2699 2700 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2701 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2702 oop mirror = value->pool_holder()->java_mirror(); 2703 // Save the mirror to get back the constant pool. 2704 reflect->obj_field_put(_oop_offset, mirror); 2705 } 2706 2707 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2709 2710 oop mirror = reflect->obj_field(_oop_offset); 2711 Klass* k = java_lang_Class::as_Klass(mirror); 2712 assert(k->is_instance_klass(), "Must be"); 2713 2714 // Get the constant pool back from the klass. Since class redefinition 2715 // merges the new constant pool into the old, this is essentially the 2716 // same constant pool as the original. If constant pool merging is 2717 // no longer done in the future, this will have to change to save 2718 // the original. 2719 return InstanceKlass::cast(k)->constants(); 2720 } 2721 2722 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2723 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2724 // This null test can be removed post beta 2725 if (k != NULL) { 2726 compute_offset(_base_offset, k, 2727 vmSymbols::base_name(), vmSymbols::object_signature()); 2728 } 2729 } 2730 2731 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2732 Klass* k = SystemDictionary::box_klass(type); 2733 if (k == NULL) return NULL; 2734 instanceKlassHandle h (THREAD, k); 2735 if (!h->is_initialized()) h->initialize(CHECK_0); 2736 return h->allocate_instance(THREAD); 2737 } 2738 2739 2740 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2741 oop box = initialize_and_allocate(type, CHECK_0); 2742 if (box == NULL) return NULL; 2743 switch (type) { 2744 case T_BOOLEAN: 2745 box->bool_field_put(value_offset, value->z); 2746 break; 2747 case T_CHAR: 2748 box->char_field_put(value_offset, value->c); 2749 break; 2750 case T_FLOAT: 2751 box->float_field_put(value_offset, value->f); 2752 break; 2753 case T_DOUBLE: 2754 box->double_field_put(long_value_offset, value->d); 2755 break; 2756 case T_BYTE: 2757 box->byte_field_put(value_offset, value->b); 2758 break; 2759 case T_SHORT: 2760 box->short_field_put(value_offset, value->s); 2761 break; 2762 case T_INT: 2763 box->int_field_put(value_offset, value->i); 2764 break; 2765 case T_LONG: 2766 box->long_field_put(long_value_offset, value->j); 2767 break; 2768 default: 2769 return NULL; 2770 } 2771 return box; 2772 } 2773 2774 2775 BasicType java_lang_boxing_object::basic_type(oop box) { 2776 if (box == NULL) return T_ILLEGAL; 2777 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2778 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2779 return T_ILLEGAL; 2780 return type; 2781 } 2782 2783 2784 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2785 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2786 switch (type) { 2787 case T_BOOLEAN: 2788 value->z = box->bool_field(value_offset); 2789 break; 2790 case T_CHAR: 2791 value->c = box->char_field(value_offset); 2792 break; 2793 case T_FLOAT: 2794 value->f = box->float_field(value_offset); 2795 break; 2796 case T_DOUBLE: 2797 value->d = box->double_field(long_value_offset); 2798 break; 2799 case T_BYTE: 2800 value->b = box->byte_field(value_offset); 2801 break; 2802 case T_SHORT: 2803 value->s = box->short_field(value_offset); 2804 break; 2805 case T_INT: 2806 value->i = box->int_field(value_offset); 2807 break; 2808 case T_LONG: 2809 value->j = box->long_field(long_value_offset); 2810 break; 2811 default: 2812 return T_ILLEGAL; 2813 } // end switch 2814 return type; 2815 } 2816 2817 2818 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2819 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2820 switch (type) { 2821 case T_BOOLEAN: 2822 box->bool_field_put(value_offset, value->z); 2823 break; 2824 case T_CHAR: 2825 box->char_field_put(value_offset, value->c); 2826 break; 2827 case T_FLOAT: 2828 box->float_field_put(value_offset, value->f); 2829 break; 2830 case T_DOUBLE: 2831 box->double_field_put(long_value_offset, value->d); 2832 break; 2833 case T_BYTE: 2834 box->byte_field_put(value_offset, value->b); 2835 break; 2836 case T_SHORT: 2837 box->short_field_put(value_offset, value->s); 2838 break; 2839 case T_INT: 2840 box->int_field_put(value_offset, value->i); 2841 break; 2842 case T_LONG: 2843 box->long_field_put(long_value_offset, value->j); 2844 break; 2845 default: 2846 return T_ILLEGAL; 2847 } // end switch 2848 return type; 2849 } 2850 2851 2852 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2853 switch (type) { 2854 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2855 case T_CHAR: st->print("%d", value->c); break; 2856 case T_BYTE: st->print("%d", value->b); break; 2857 case T_SHORT: st->print("%d", value->s); break; 2858 case T_INT: st->print("%d", value->i); break; 2859 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2860 case T_FLOAT: st->print("%f", value->f); break; 2861 case T_DOUBLE: st->print("%lf", value->d); break; 2862 default: st->print("type %d?", type); break; 2863 } 2864 } 2865 2866 2867 // Support for java_lang_ref_Reference 2868 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2869 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2870 address addr = ik->static_field_addr(static_lock_offset); 2871 return (HeapWord*) addr; 2872 } 2873 2874 oop java_lang_ref_Reference::pending_list_lock() { 2875 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2876 address addr = ik->static_field_addr(static_lock_offset); 2877 if (UseCompressedOops) { 2878 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2879 } else { 2880 return oopDesc::load_decode_heap_oop((oop*)addr); 2881 } 2882 } 2883 2884 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2885 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2886 address addr = ik->static_field_addr(static_pending_offset); 2887 // XXX This might not be HeapWord aligned, almost rather be char *. 2888 return (HeapWord*)addr; 2889 } 2890 2891 oop java_lang_ref_Reference::pending_list() { 2892 char *addr = (char *)pending_list_addr(); 2893 if (UseCompressedOops) { 2894 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2895 } else { 2896 return oopDesc::load_decode_heap_oop((oop*)addr); 2897 } 2898 } 2899 2900 2901 // Support for java_lang_ref_SoftReference 2902 2903 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2904 return ref->long_field(timestamp_offset); 2905 } 2906 2907 jlong java_lang_ref_SoftReference::clock() { 2908 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2909 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2910 return *offset; 2911 } 2912 2913 void java_lang_ref_SoftReference::set_clock(jlong value) { 2914 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2915 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2916 *offset = value; 2917 } 2918 2919 // Support for java_lang_invoke_DirectMethodHandle 2920 2921 int java_lang_invoke_DirectMethodHandle::_member_offset; 2922 2923 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2924 oop member_name = NULL; 2925 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2926 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2927 if (is_dmh) { 2928 member_name = dmh->obj_field(member_offset_in_bytes()); 2929 } 2930 return member_name; 2931 } 2932 2933 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2934 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2935 if (klass_oop != NULL) { 2936 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2937 } 2938 } 2939 2940 // Support for java_lang_invoke_MethodHandle 2941 2942 int java_lang_invoke_MethodHandle::_type_offset; 2943 int java_lang_invoke_MethodHandle::_form_offset; 2944 2945 int java_lang_invoke_MemberName::_clazz_offset; 2946 int java_lang_invoke_MemberName::_name_offset; 2947 int java_lang_invoke_MemberName::_type_offset; 2948 int java_lang_invoke_MemberName::_flags_offset; 2949 int java_lang_invoke_MemberName::_vmtarget_offset; 2950 int java_lang_invoke_MemberName::_vmloader_offset; 2951 int java_lang_invoke_MemberName::_vmindex_offset; 2952 2953 int java_lang_invoke_LambdaForm::_vmentry_offset; 2954 2955 void java_lang_invoke_MethodHandle::compute_offsets() { 2956 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2957 if (klass_oop != NULL) { 2958 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2959 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2960 } 2961 } 2962 2963 void java_lang_invoke_MemberName::compute_offsets() { 2964 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2965 if (klass_oop != NULL) { 2966 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2967 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2968 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2969 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2970 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2971 } 2972 } 2973 2974 void java_lang_invoke_LambdaForm::compute_offsets() { 2975 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2976 if (klass_oop != NULL) { 2977 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2978 } 2979 } 2980 2981 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2982 return obj != NULL && is_subclass(obj->klass()); 2983 } 2984 2985 2986 oop java_lang_invoke_MethodHandle::type(oop mh) { 2987 return mh->obj_field(_type_offset); 2988 } 2989 2990 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2991 mh->obj_field_put(_type_offset, mtype); 2992 } 2993 2994 oop java_lang_invoke_MethodHandle::form(oop mh) { 2995 assert(_form_offset != 0, ""); 2996 return mh->obj_field(_form_offset); 2997 } 2998 2999 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3000 assert(_form_offset != 0, ""); 3001 mh->obj_field_put(_form_offset, lform); 3002 } 3003 3004 /// MemberName accessors 3005 3006 oop java_lang_invoke_MemberName::clazz(oop mname) { 3007 assert(is_instance(mname), "wrong type"); 3008 return mname->obj_field(_clazz_offset); 3009 } 3010 3011 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3012 assert(is_instance(mname), "wrong type"); 3013 mname->obj_field_put(_clazz_offset, clazz); 3014 } 3015 3016 oop java_lang_invoke_MemberName::name(oop mname) { 3017 assert(is_instance(mname), "wrong type"); 3018 return mname->obj_field(_name_offset); 3019 } 3020 3021 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3022 assert(is_instance(mname), "wrong type"); 3023 mname->obj_field_put(_name_offset, name); 3024 } 3025 3026 oop java_lang_invoke_MemberName::type(oop mname) { 3027 assert(is_instance(mname), "wrong type"); 3028 return mname->obj_field(_type_offset); 3029 } 3030 3031 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3032 assert(is_instance(mname), "wrong type"); 3033 mname->obj_field_put(_type_offset, type); 3034 } 3035 3036 int java_lang_invoke_MemberName::flags(oop mname) { 3037 assert(is_instance(mname), "wrong type"); 3038 return mname->int_field(_flags_offset); 3039 } 3040 3041 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3042 assert(is_instance(mname), "wrong type"); 3043 mname->int_field_put(_flags_offset, flags); 3044 } 3045 3046 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3047 assert(is_instance(mname), "wrong type"); 3048 return (Metadata*)mname->address_field(_vmtarget_offset); 3049 } 3050 3051 bool java_lang_invoke_MemberName::is_method(oop mname) { 3052 assert(is_instance(mname), "must be MemberName"); 3053 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3054 } 3055 3056 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3057 assert(is_instance(mname), "wrong type"); 3058 // check the type of the vmtarget 3059 oop dependency = NULL; 3060 if (ref != NULL) { 3061 switch (flags(mname) & (MN_IS_METHOD | 3062 MN_IS_CONSTRUCTOR | 3063 MN_IS_FIELD)) { 3064 case MN_IS_METHOD: 3065 case MN_IS_CONSTRUCTOR: 3066 assert(ref->is_method(), "should be a method"); 3067 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3068 break; 3069 case MN_IS_FIELD: 3070 assert(ref->is_klass(), "should be a class"); 3071 dependency = ((Klass*)ref)->java_mirror(); 3072 break; 3073 default: 3074 ShouldNotReachHere(); 3075 } 3076 } 3077 mname->address_field_put(_vmtarget_offset, (address)ref); 3078 // Add a reference to the loader (actually mirror because anonymous classes will not have 3079 // distinct loaders) to ensure the metadata is kept alive 3080 // This mirror may be different than the one in clazz field. 3081 mname->obj_field_put(_vmloader_offset, dependency); 3082 } 3083 3084 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3085 assert(is_instance(mname), "wrong type"); 3086 return (intptr_t) mname->address_field(_vmindex_offset); 3087 } 3088 3089 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3090 assert(is_instance(mname), "wrong type"); 3091 mname->address_field_put(_vmindex_offset, (address) index); 3092 } 3093 3094 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3095 assert(is_instance(lform), "wrong type"); 3096 return lform->obj_field(_vmentry_offset); 3097 } 3098 3099 3100 // Support for java_lang_invoke_MethodType 3101 3102 int java_lang_invoke_MethodType::_rtype_offset; 3103 int java_lang_invoke_MethodType::_ptypes_offset; 3104 3105 void java_lang_invoke_MethodType::compute_offsets() { 3106 Klass* k = SystemDictionary::MethodType_klass(); 3107 if (k != NULL) { 3108 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3109 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3110 } 3111 } 3112 3113 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3114 st->print("("); 3115 objArrayOop pts = ptypes(mt); 3116 for (int i = 0, limit = pts->length(); i < limit; i++) { 3117 java_lang_Class::print_signature(pts->obj_at(i), st); 3118 } 3119 st->print(")"); 3120 java_lang_Class::print_signature(rtype(mt), st); 3121 } 3122 3123 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3124 ResourceMark rm; 3125 stringStream buffer(128); 3126 print_signature(mt, &buffer); 3127 const char* sigstr = buffer.base(); 3128 int siglen = (int) buffer.size(); 3129 Symbol *name; 3130 if (!intern_if_not_found) { 3131 name = SymbolTable::probe(sigstr, siglen); 3132 } else { 3133 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3134 } 3135 return name; 3136 } 3137 3138 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3139 if (mt1 == mt2) 3140 return true; 3141 if (rtype(mt1) != rtype(mt2)) 3142 return false; 3143 if (ptype_count(mt1) != ptype_count(mt2)) 3144 return false; 3145 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3146 if (ptype(mt1, i) != ptype(mt2, i)) 3147 return false; 3148 } 3149 return true; 3150 } 3151 3152 oop java_lang_invoke_MethodType::rtype(oop mt) { 3153 assert(is_instance(mt), "must be a MethodType"); 3154 return mt->obj_field(_rtype_offset); 3155 } 3156 3157 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3158 assert(is_instance(mt), "must be a MethodType"); 3159 return (objArrayOop) mt->obj_field(_ptypes_offset); 3160 } 3161 3162 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3163 return ptypes(mt)->obj_at(idx); 3164 } 3165 3166 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3167 return ptypes(mt)->length(); 3168 } 3169 3170 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3171 objArrayOop pts = ptypes(mt); 3172 int count = pts->length(); 3173 int slots = 0; 3174 for (int i = 0; i < count; i++) { 3175 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3176 slots += type2size[bt]; 3177 } 3178 return slots; 3179 } 3180 3181 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3182 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3183 return type2size[bt]; 3184 } 3185 3186 3187 // Support for java_lang_invoke_CallSite 3188 3189 int java_lang_invoke_CallSite::_target_offset; 3190 int java_lang_invoke_CallSite::_context_offset; 3191 3192 void java_lang_invoke_CallSite::compute_offsets() { 3193 Klass* k = SystemDictionary::CallSite_klass(); 3194 if (k != NULL) { 3195 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3196 compute_offset(_context_offset, k, vmSymbols::context_name(), 3197 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3198 } 3199 } 3200 3201 oop java_lang_invoke_CallSite::context(oop call_site) { 3202 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3203 3204 oop dep_oop = call_site->obj_field(_context_offset); 3205 return dep_oop; 3206 } 3207 3208 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3209 3210 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3211 3212 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3213 Klass* k = SystemDictionary::Context_klass(); 3214 if (k != NULL) { 3215 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3216 } 3217 } 3218 3219 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3220 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3221 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3222 } 3223 3224 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3225 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3226 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3227 } 3228 3229 // Support for java_security_AccessControlContext 3230 3231 int java_security_AccessControlContext::_context_offset = 0; 3232 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3233 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3234 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3235 3236 void java_security_AccessControlContext::compute_offsets() { 3237 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3238 fieldDescriptor fd; 3239 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3240 3241 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3242 fatal("Invalid layout of java.security.AccessControlContext"); 3243 } 3244 _context_offset = fd.offset(); 3245 3246 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3247 fatal("Invalid layout of java.security.AccessControlContext"); 3248 } 3249 _privilegedContext_offset = fd.offset(); 3250 3251 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3252 fatal("Invalid layout of java.security.AccessControlContext"); 3253 } 3254 _isPrivileged_offset = fd.offset(); 3255 3256 // The offset may not be present for bootstrapping with older JDK. 3257 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3258 _isAuthorized_offset = fd.offset(); 3259 } 3260 } 3261 3262 3263 bool java_security_AccessControlContext::is_authorized(Handle context) { 3264 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3265 assert(_isAuthorized_offset != -1, "should be set"); 3266 return context->bool_field(_isAuthorized_offset) != 0; 3267 } 3268 3269 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3270 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3271 // Ensure klass is initialized 3272 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3273 // Allocate result 3274 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3275 // Fill in values 3276 result->obj_field_put(_context_offset, context()); 3277 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3278 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3279 // whitelist AccessControlContexts created by the JVM if present 3280 if (_isAuthorized_offset != -1) { 3281 result->bool_field_put(_isAuthorized_offset, true); 3282 } 3283 return result; 3284 } 3285 3286 3287 // Support for java_lang_ClassLoader 3288 3289 bool java_lang_ClassLoader::offsets_computed = false; 3290 int java_lang_ClassLoader::_loader_data_offset = -1; 3291 int java_lang_ClassLoader::parallelCapable_offset = -1; 3292 3293 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3294 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3295 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3296 } 3297 3298 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3299 return *java_lang_ClassLoader::loader_data_addr(loader); 3300 } 3301 3302 void java_lang_ClassLoader::compute_offsets() { 3303 assert(!offsets_computed, "offsets should be initialized only once"); 3304 offsets_computed = true; 3305 3306 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3307 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3308 compute_optional_offset(parallelCapable_offset, 3309 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3310 3311 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3312 } 3313 3314 oop java_lang_ClassLoader::parent(oop loader) { 3315 assert(is_instance(loader), "loader must be oop"); 3316 return loader->obj_field(parent_offset); 3317 } 3318 3319 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3320 assert(is_instance(loader), "loader must be oop"); 3321 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3322 oop acl = loader; 3323 debug_only(jint loop_count = 0); 3324 // This loop taken verbatim from ClassLoader.java: 3325 do { 3326 acl = parent(acl); 3327 if (cl == acl) { 3328 return true; 3329 } 3330 assert(++loop_count > 0, "loop_count overflow"); 3331 } while (acl != NULL); 3332 return false; 3333 } 3334 3335 bool java_lang_ClassLoader::is_instance(oop obj) { 3336 return obj != NULL && is_subclass(obj->klass()); 3337 } 3338 3339 3340 // For class loader classes, parallelCapable defined 3341 // based on non-null field 3342 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3343 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3344 if (parallelCapable_offset == -1) { 3345 // Default for backward compatibility is false 3346 return false; 3347 } 3348 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3349 } 3350 3351 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3352 // Fix for 4474172; see evaluation for more details 3353 loader = non_reflection_class_loader(loader); 3354 3355 oop cl = SystemDictionary::java_system_loader(); 3356 while(cl != NULL) { 3357 if (cl == loader) return true; 3358 cl = parent(cl); 3359 } 3360 return false; 3361 } 3362 3363 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3364 if (loader != NULL) { 3365 // See whether this is one of the class loaders associated with 3366 // the generated bytecodes for reflection, and if so, "magically" 3367 // delegate to its parent to prevent class loading from occurring 3368 // in places where applications using reflection didn't expect it. 3369 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3370 // This might be null in non-1.4 JDKs 3371 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3372 return parent(loader); 3373 } 3374 } 3375 return loader; 3376 } 3377 3378 3379 // Support for java_lang_System 3380 int java_lang_System::in_offset_in_bytes() { 3381 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3382 } 3383 3384 3385 int java_lang_System::out_offset_in_bytes() { 3386 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3387 } 3388 3389 3390 int java_lang_System::err_offset_in_bytes() { 3391 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3392 } 3393 3394 3395 bool java_lang_System::has_security_manager() { 3396 InstanceKlass* ik = SystemDictionary::System_klass(); 3397 address addr = ik->static_field_addr(static_security_offset); 3398 if (UseCompressedOops) { 3399 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3400 } else { 3401 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3402 } 3403 } 3404 3405 int java_lang_Class::_klass_offset; 3406 int java_lang_Class::_array_klass_offset; 3407 int java_lang_Class::_oop_size_offset; 3408 int java_lang_Class::_static_oop_field_count_offset; 3409 int java_lang_Class::_class_loader_offset; 3410 int java_lang_Class::_protection_domain_offset; 3411 int java_lang_Class::_component_mirror_offset; 3412 int java_lang_Class::_init_lock_offset; 3413 int java_lang_Class::_signers_offset; 3414 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3415 int java_lang_Throwable::backtrace_offset; 3416 int java_lang_Throwable::detailMessage_offset; 3417 int java_lang_Throwable::cause_offset; 3418 int java_lang_Throwable::stackTrace_offset; 3419 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3420 int java_lang_reflect_AccessibleObject::override_offset; 3421 int java_lang_reflect_Method::clazz_offset; 3422 int java_lang_reflect_Method::name_offset; 3423 int java_lang_reflect_Method::returnType_offset; 3424 int java_lang_reflect_Method::parameterTypes_offset; 3425 int java_lang_reflect_Method::exceptionTypes_offset; 3426 int java_lang_reflect_Method::slot_offset; 3427 int java_lang_reflect_Method::modifiers_offset; 3428 int java_lang_reflect_Method::signature_offset; 3429 int java_lang_reflect_Method::annotations_offset; 3430 int java_lang_reflect_Method::parameter_annotations_offset; 3431 int java_lang_reflect_Method::annotation_default_offset; 3432 int java_lang_reflect_Method::type_annotations_offset; 3433 int java_lang_reflect_Constructor::clazz_offset; 3434 int java_lang_reflect_Constructor::parameterTypes_offset; 3435 int java_lang_reflect_Constructor::exceptionTypes_offset; 3436 int java_lang_reflect_Constructor::slot_offset; 3437 int java_lang_reflect_Constructor::modifiers_offset; 3438 int java_lang_reflect_Constructor::signature_offset; 3439 int java_lang_reflect_Constructor::annotations_offset; 3440 int java_lang_reflect_Constructor::parameter_annotations_offset; 3441 int java_lang_reflect_Constructor::type_annotations_offset; 3442 int java_lang_reflect_Field::clazz_offset; 3443 int java_lang_reflect_Field::name_offset; 3444 int java_lang_reflect_Field::type_offset; 3445 int java_lang_reflect_Field::slot_offset; 3446 int java_lang_reflect_Field::modifiers_offset; 3447 int java_lang_reflect_Field::signature_offset; 3448 int java_lang_reflect_Field::annotations_offset; 3449 int java_lang_reflect_Field::type_annotations_offset; 3450 int java_lang_reflect_Parameter::name_offset; 3451 int java_lang_reflect_Parameter::modifiers_offset; 3452 int java_lang_reflect_Parameter::index_offset; 3453 int java_lang_reflect_Parameter::executable_offset; 3454 int java_lang_boxing_object::value_offset; 3455 int java_lang_boxing_object::long_value_offset; 3456 int java_lang_ref_Reference::referent_offset; 3457 int java_lang_ref_Reference::queue_offset; 3458 int java_lang_ref_Reference::next_offset; 3459 int java_lang_ref_Reference::discovered_offset; 3460 int java_lang_ref_Reference::static_lock_offset; 3461 int java_lang_ref_Reference::static_pending_offset; 3462 int java_lang_ref_Reference::number_of_fake_oop_fields; 3463 int java_lang_ref_SoftReference::timestamp_offset; 3464 int java_lang_ref_SoftReference::static_clock_offset; 3465 int java_lang_ClassLoader::parent_offset; 3466 int java_lang_System::static_in_offset; 3467 int java_lang_System::static_out_offset; 3468 int java_lang_System::static_err_offset; 3469 int java_lang_System::static_security_offset; 3470 int java_lang_StackTraceElement::declaringClass_offset; 3471 int java_lang_StackTraceElement::methodName_offset; 3472 int java_lang_StackTraceElement::fileName_offset; 3473 int java_lang_StackTraceElement::lineNumber_offset; 3474 int java_lang_AssertionStatusDirectives::classes_offset; 3475 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3476 int java_lang_AssertionStatusDirectives::packages_offset; 3477 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3478 int java_lang_AssertionStatusDirectives::deflt_offset; 3479 int java_nio_Buffer::_limit_offset; 3480 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3481 int sun_reflect_ConstantPool::_oop_offset; 3482 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3483 3484 3485 // Support for java_lang_StackTraceElement 3486 3487 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3488 element->obj_field_put(fileName_offset, value); 3489 } 3490 3491 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3492 element->obj_field_put(declaringClass_offset, value); 3493 } 3494 3495 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3496 element->obj_field_put(methodName_offset, value); 3497 } 3498 3499 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3500 element->int_field_put(lineNumber_offset, value); 3501 } 3502 3503 3504 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3505 3506 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3507 o->obj_field_put(classes_offset, val); 3508 } 3509 3510 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3511 o->obj_field_put(classEnabled_offset, val); 3512 } 3513 3514 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3515 o->obj_field_put(packages_offset, val); 3516 } 3517 3518 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3519 o->obj_field_put(packageEnabled_offset, val); 3520 } 3521 3522 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3523 o->bool_field_put(deflt_offset, val); 3524 } 3525 3526 3527 // Support for intrinsification of java.nio.Buffer.checkIndex 3528 int java_nio_Buffer::limit_offset() { 3529 return _limit_offset; 3530 } 3531 3532 3533 void java_nio_Buffer::compute_offsets() { 3534 Klass* k = SystemDictionary::nio_Buffer_klass(); 3535 assert(k != NULL, "must be loaded in 1.4+"); 3536 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3537 } 3538 3539 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3540 if (_owner_offset != 0) return; 3541 3542 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3543 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3544 compute_offset(_owner_offset, k, 3545 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3546 } 3547 3548 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3549 assert(_owner_offset != 0, "Must be initialized"); 3550 return obj->obj_field(_owner_offset); 3551 } 3552 3553 // Compute hard-coded offsets 3554 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3555 // are not available to determine the offset_of_static_fields. 3556 void JavaClasses::compute_hard_coded_offsets() { 3557 const int x = heapOopSize; 3558 const int header = instanceOopDesc::base_offset_in_bytes(); 3559 3560 // Throwable Class 3561 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3562 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3563 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3564 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3565 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3566 3567 // java_lang_boxing_object 3568 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3569 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3570 3571 // java_lang_ref_Reference: 3572 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3573 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3574 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3575 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3576 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3577 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3578 // Artificial fields for java_lang_ref_Reference 3579 // The first field is for the discovered field added in 1.4 3580 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3581 3582 // java_lang_ref_SoftReference Class 3583 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3584 // Don't multiply static fields because they are always in wordSize units 3585 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3586 3587 // java_lang_ClassLoader 3588 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3589 3590 // java_lang_System 3591 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3592 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3593 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3594 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3595 3596 // java_lang_StackTraceElement 3597 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3598 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3599 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3600 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3601 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3602 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3603 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3604 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3605 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3606 3607 } 3608 3609 3610 // Compute non-hard-coded field offsets of all the classes in this file 3611 void JavaClasses::compute_offsets() { 3612 // java_lang_Class::compute_offsets was called earlier in bootstrap 3613 java_lang_ClassLoader::compute_offsets(); 3614 java_lang_Thread::compute_offsets(); 3615 java_lang_ThreadGroup::compute_offsets(); 3616 java_lang_invoke_MethodHandle::compute_offsets(); 3617 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3618 java_lang_invoke_MemberName::compute_offsets(); 3619 java_lang_invoke_LambdaForm::compute_offsets(); 3620 java_lang_invoke_MethodType::compute_offsets(); 3621 java_lang_invoke_CallSite::compute_offsets(); 3622 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3623 java_security_AccessControlContext::compute_offsets(); 3624 // Initialize reflection classes. The layouts of these classes 3625 // changed with the new reflection implementation in JDK 1.4, and 3626 // since the Universe doesn't know what JDK version it is until this 3627 // point we defer computation of these offsets until now. 3628 java_lang_reflect_AccessibleObject::compute_offsets(); 3629 java_lang_reflect_Method::compute_offsets(); 3630 java_lang_reflect_Constructor::compute_offsets(); 3631 java_lang_reflect_Field::compute_offsets(); 3632 java_nio_Buffer::compute_offsets(); 3633 sun_reflect_ConstantPool::compute_offsets(); 3634 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3635 java_lang_reflect_Parameter::compute_offsets(); 3636 3637 // generated interpreter code wants to know about the offsets we just computed: 3638 AbstractAssembler::update_delayed_values(); 3639 } 3640 3641 #ifndef PRODUCT 3642 3643 // These functions exist to assert the validity of hard-coded field offsets to guard 3644 // against changes in the class files 3645 3646 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3647 EXCEPTION_MARK; 3648 fieldDescriptor fd; 3649 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3650 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3651 instanceKlassHandle h_klass (THREAD, k); 3652 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3653 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3654 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3655 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3656 return false; 3657 } 3658 if (fd.is_static()) { 3659 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3660 return false; 3661 } 3662 if (fd.offset() == hardcoded_offset ) { 3663 return true; 3664 } else { 3665 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3666 klass_name, field_name, hardcoded_offset, fd.offset()); 3667 return false; 3668 } 3669 } 3670 3671 3672 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3673 EXCEPTION_MARK; 3674 fieldDescriptor fd; 3675 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3676 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3677 instanceKlassHandle h_klass (THREAD, k); 3678 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3679 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3680 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3681 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3682 return false; 3683 } 3684 if (!fd.is_static()) { 3685 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3686 return false; 3687 } 3688 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3689 return true; 3690 } else { 3691 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields()); 3692 return false; 3693 } 3694 } 3695 3696 3697 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3698 EXCEPTION_MARK; 3699 fieldDescriptor fd; 3700 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3701 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3702 instanceKlassHandle h_klass (THREAD, k); 3703 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3704 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3705 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3706 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3707 return false; 3708 } 3709 if (!fd.is_static() || !fd.has_initial_value()) { 3710 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3711 return false; 3712 } 3713 if (!fd.initial_value_tag().is_int()) { 3714 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3715 return false; 3716 } 3717 jint field_value = fd.int_initial_value(); 3718 if (field_value == hardcoded_constant) { 3719 return true; 3720 } else { 3721 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value); 3722 return false; 3723 } 3724 } 3725 3726 3727 // Check the hard-coded field offsets of all the classes in this file 3728 3729 void JavaClasses::check_offsets() { 3730 bool valid = true; 3731 HandleMark hm; 3732 3733 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3734 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3735 3736 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3737 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3738 3739 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3740 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3741 3742 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3743 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3744 3745 // java.lang.String 3746 3747 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3748 if (java_lang_String::has_hash_field()) { 3749 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3750 } 3751 if (java_lang_String::has_coder_field()) { 3752 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3753 } 3754 3755 // java.lang.Class 3756 3757 // Fake fields 3758 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3759 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3760 3761 // java.lang.Throwable 3762 3763 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3764 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3765 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3766 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3767 3768 // Boxed primitive objects (java_lang_boxing_object) 3769 3770 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3771 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3772 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3773 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3774 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3775 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3776 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3777 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3778 3779 // java.lang.ClassLoader 3780 3781 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3782 3783 // java.lang.System 3784 3785 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3786 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3787 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3788 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3789 3790 // java.lang.StackTraceElement 3791 3792 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3793 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3794 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3795 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3796 3797 // java.lang.ref.Reference 3798 3799 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3800 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3801 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3802 // Fake field 3803 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3804 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3805 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3806 3807 // java.lang.ref.SoftReference 3808 3809 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3810 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3811 3812 // java.lang.AssertionStatusDirectives 3813 // 3814 // The CheckAssertionStatusDirectives boolean can be removed from here and 3815 // globals.hpp after the AssertionStatusDirectives class has been integrated 3816 // into merlin "for some time." Without it, the vm will fail with early 3817 // merlin builds. 3818 3819 if (CheckAssertionStatusDirectives) { 3820 const char* nm = "java/lang/AssertionStatusDirectives"; 3821 const char* sig = "[Ljava/lang/String;"; 3822 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3823 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3824 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3825 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3826 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3827 } 3828 3829 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3830 } 3831 3832 #endif // PRODUCT 3833 3834 int InjectedField::compute_offset() { 3835 InstanceKlass* ik = InstanceKlass::cast(klass()); 3836 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3837 if (!may_be_java && !fs.access_flags().is_internal()) { 3838 // Only look at injected fields 3839 continue; 3840 } 3841 if (fs.name() == name() && fs.signature() == signature()) { 3842 return fs.offset(); 3843 } 3844 } 3845 ResourceMark rm; 3846 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)" : ""); 3847 #ifndef PRODUCT 3848 ik->print(); 3849 tty->print_cr("all fields:"); 3850 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3851 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3852 } 3853 #endif //PRODUCT 3854 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3855 return -1; 3856 } 3857 3858 void javaClasses_init() { 3859 JavaClasses::compute_offsets(); 3860 JavaClasses::check_offsets(); 3861 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3862 }