1 /* 2 * Copyright (c) 1997, 2016, 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/dependencyContext.hpp" 32 #include "code/pcDesc.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/fieldStreams.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceMirrorKlass.hpp" 40 #include "oops/klass.hpp" 41 #include "oops/method.hpp" 42 #include "oops/objArrayOop.inline.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "oops/typeArrayOop.hpp" 46 #include "prims/jvmtiRedefineClassesTrace.hpp" 47 #include "runtime/fieldDescriptor.hpp" 48 #include "runtime/handles.inline.hpp" 49 #include "runtime/interfaceSupport.hpp" 50 #include "runtime/java.hpp" 51 #include "runtime/javaCalls.hpp" 52 #include "runtime/safepoint.hpp" 53 #include "runtime/thread.inline.hpp" 54 #include "runtime/vframe.hpp" 55 #include "utilities/preserveException.hpp" 56 57 #if INCLUDE_JVMCI 58 #include "jvmci/jvmciJavaClasses.hpp" 59 #endif 60 61 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 62 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 63 64 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 65 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 66 67 InjectedField JavaClasses::_injected_fields[] = { 68 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 69 }; 70 71 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 72 return _injected_fields[id].compute_offset(); 73 } 74 75 76 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 77 *field_count = 0; 78 79 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 80 if (sid == vmSymbols::NO_SID) { 81 // Only well known classes can inject fields 82 return NULL; 83 } 84 85 int count = 0; 86 int start = -1; 87 88 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 89 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 90 count++; \ 91 if (start == -1) start = klass##_##name##_enum; \ 92 } 93 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 94 #undef LOOKUP_INJECTED_FIELD 95 96 if (start != -1) { 97 *field_count = count; 98 return _injected_fields + start; 99 } 100 return NULL; 101 } 102 103 104 static bool find_field(InstanceKlass* ik, 105 Symbol* name_symbol, Symbol* signature_symbol, 106 fieldDescriptor* fd, 107 bool is_static = false, bool allow_super = false) { 108 if (allow_super || is_static) { 109 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 110 } else { 111 return ik->find_local_field(name_symbol, signature_symbol, fd); 112 } 113 } 114 115 // Helpful routine for computing field offsets at run time rather than hardcoding them 116 static void 117 compute_offset(int &dest_offset, 118 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 119 bool is_static = false, bool allow_super = false) { 120 fieldDescriptor fd; 121 InstanceKlass* ik = InstanceKlass::cast(klass); 122 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 123 ResourceMark rm; 124 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 125 #ifndef PRODUCT 126 ik->print(); 127 tty->print_cr("all fields:"); 128 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 129 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 130 } 131 #endif //PRODUCT 132 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:classload=info to see the origin of the problem class"); 133 } 134 dest_offset = fd.offset(); 135 } 136 137 // Same as above but for "optional" offsets that might not be present in certain JDK versions 138 static void 139 compute_optional_offset(int& dest_offset, 140 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 141 bool allow_super = false) { 142 fieldDescriptor fd; 143 InstanceKlass* ik = InstanceKlass::cast(klass); 144 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 145 dest_offset = fd.offset(); 146 } 147 } 148 149 150 int java_lang_String::value_offset = 0; 151 int java_lang_String::hash_offset = 0; 152 int java_lang_String::coder_offset = 0; 153 154 bool java_lang_String::initialized = false; 155 156 bool java_lang_String::is_instance(oop obj) { 157 return is_instance_inlined(obj); 158 } 159 160 void java_lang_String::compute_offsets() { 161 assert(!initialized, "offsets should be initialized only once"); 162 163 Klass* k = SystemDictionary::String_klass(); 164 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 166 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 167 168 initialized = true; 169 } 170 171 class CompactStringsFixup : public FieldClosure { 172 private: 173 bool _value; 174 175 public: 176 CompactStringsFixup(bool value) : _value(value) {} 177 178 void do_field(fieldDescriptor* fd) { 179 if (fd->name() == vmSymbols::compact_strings_name()) { 180 oop mirror = fd->field_holder()->java_mirror(); 181 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 182 assert(mirror != NULL, "String must have mirror already"); 183 mirror->bool_field_put(fd->offset(), _value); 184 } 185 } 186 }; 187 188 void java_lang_String::set_compact_strings(bool value) { 189 CompactStringsFixup fix(value); 190 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 191 } 192 193 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 194 assert(initialized, "Must be initialized"); 195 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 196 197 // Create the String object first, so there's a chance that the String 198 // and the char array it points to end up in the same cache line. 199 oop obj; 200 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 201 202 // Create the char array. The String object must be handlized here 203 // because GC can happen as a result of the allocation attempt. 204 Handle h_obj(THREAD, obj); 205 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 206 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 207 208 // Point the String at the char array 209 obj = h_obj(); 210 set_value(obj, buffer); 211 // No need to zero the offset, allocation zero'ed the entire String object 212 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 213 return h_obj; 214 } 215 216 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 217 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 218 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 219 typeArrayOop buffer = value(h_obj()); 220 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 221 if (is_latin1) { 222 for (int index = 0; index < length; index++) { 223 buffer->byte_at_put(index, (jbyte)unicode[index]); 224 } 225 } else { 226 for (int index = 0; index < length; index++) { 227 buffer->char_at_put(index, unicode[index]); 228 } 229 } 230 231 #ifdef ASSERT 232 { 233 ResourceMark rm; 234 char* expected = UNICODE::as_utf8(unicode, length); 235 char* actual = as_utf8_string(h_obj()); 236 if (strcmp(expected, actual) != 0) { 237 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 238 ShouldNotReachHere(); 239 } 240 } 241 #endif 242 243 return h_obj; 244 } 245 246 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 247 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 248 return h_obj(); 249 } 250 251 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 252 if (utf8_str == NULL) { 253 return Handle(); 254 } 255 bool has_multibyte, is_latin1; 256 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 257 if (!CompactStrings) { 258 has_multibyte = true; 259 is_latin1 = false; 260 } 261 262 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 263 if (length > 0) { 264 if (!has_multibyte) { 265 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 266 } else if (is_latin1) { 267 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 268 } else { 269 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 270 } 271 } 272 273 #ifdef ASSERT 274 // This check is too strict because the input string is not necessarily valid UTF8. 275 // For example, it may be created with arbitrary content via jni_NewStringUTF. 276 /* 277 { 278 ResourceMark rm; 279 const char* expected = utf8_str; 280 char* actual = as_utf8_string(h_obj()); 281 if (strcmp(expected, actual) != 0) { 282 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 283 ShouldNotReachHere(); 284 } 285 } 286 */ 287 #endif 288 289 return h_obj; 290 } 291 292 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 293 Handle h_obj = create_from_str(utf8_str, CHECK_0); 294 return h_obj(); 295 } 296 297 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 298 const char* utf8_str = (char*)symbol->bytes(); 299 int utf8_len = symbol->utf8_length(); 300 301 bool has_multibyte, is_latin1; 302 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 303 if (!CompactStrings) { 304 has_multibyte = true; 305 is_latin1 = false; 306 } 307 308 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 309 if (length > 0) { 310 if (!has_multibyte) { 311 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 312 } else if (is_latin1) { 313 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 314 } else { 315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 316 } 317 } 318 319 #ifdef ASSERT 320 { 321 ResourceMark rm; 322 const char* expected = symbol->as_utf8(); 323 char* actual = as_utf8_string(h_obj()); 324 if (strncmp(expected, actual, utf8_len) != 0) { 325 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 326 ShouldNotReachHere(); 327 } 328 } 329 #endif 330 331 return h_obj; 332 } 333 334 // Converts a C string to a Java String based on current encoding 335 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 336 assert(str != NULL, "bad arguments"); 337 338 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 339 static to_java_string_fn_t _to_java_string_fn = NULL; 340 341 if (_to_java_string_fn == NULL) { 342 void *lib_handle = os::native_java_library(); 343 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 344 if (_to_java_string_fn == NULL) { 345 fatal("NewStringPlatform missing"); 346 } 347 } 348 349 jstring js = NULL; 350 { JavaThread* thread = (JavaThread*)THREAD; 351 assert(thread->is_Java_thread(), "must be java thread"); 352 HandleMark hm(thread); 353 ThreadToNativeFromVM ttn(thread); 354 js = (_to_java_string_fn)(thread->jni_environment(), str); 355 } 356 return Handle(THREAD, JNIHandles::resolve(js)); 357 } 358 359 // Converts a Java String to a native C string that can be used for 360 // native OS calls. 361 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 362 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 363 static to_platform_string_fn_t _to_platform_string_fn = NULL; 364 365 if (_to_platform_string_fn == NULL) { 366 void *lib_handle = os::native_java_library(); 367 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 368 if (_to_platform_string_fn == NULL) { 369 fatal("GetStringPlatformChars missing"); 370 } 371 } 372 373 char *native_platform_string; 374 { JavaThread* thread = (JavaThread*)THREAD; 375 assert(thread->is_Java_thread(), "must be java thread"); 376 JNIEnv *env = thread->jni_environment(); 377 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 378 bool is_copy; 379 HandleMark hm(thread); 380 ThreadToNativeFromVM ttn(thread); 381 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 382 assert(is_copy == JNI_TRUE, "is_copy value changed"); 383 JNIHandles::destroy_local(js); 384 } 385 return native_platform_string; 386 } 387 388 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 389 oop obj = java_string(); 390 // Typical usage is to convert all '/' to '.' in string. 391 typeArrayOop value = java_lang_String::value(obj); 392 int length = java_lang_String::length(obj); 393 bool is_latin1 = java_lang_String::is_latin1(obj); 394 395 // First check if any from_char exist 396 int index; // Declared outside, used later 397 for (index = 0; index < length; index++) { 398 jchar c = !is_latin1 ? value->char_at(index) : 399 ((jchar) value->byte_at(index)) & 0xff; 400 if (c == from_char) { 401 break; 402 } 403 } 404 if (index == length) { 405 // No from_char, so do not copy. 406 return java_string; 407 } 408 409 // Check if result string will be latin1 410 bool to_is_latin1 = false; 411 412 // Replacement char must be latin1 413 if (CompactStrings && UNICODE::is_latin1(to_char)) { 414 if (is_latin1) { 415 // Source string is latin1 as well 416 to_is_latin1 = true; 417 } else if (!UNICODE::is_latin1(from_char)) { 418 // We are replacing an UTF16 char. Scan string to 419 // check if result can be latin1 encoded. 420 to_is_latin1 = true; 421 for (index = 0; index < length; index++) { 422 jchar c = value->char_at(index); 423 if (c != from_char && !UNICODE::is_latin1(c)) { 424 to_is_latin1 = false; 425 break; 426 } 427 } 428 } 429 } 430 431 // Create new UNICODE (or byte) buffer. Must handlize value because GC 432 // may happen during String and char array creation. 433 typeArrayHandle h_value(THREAD, value); 434 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 435 typeArrayOop from_buffer = h_value(); 436 typeArrayOop to_buffer = java_lang_String::value(string()); 437 438 // Copy contents 439 for (index = 0; index < length; index++) { 440 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 441 ((jchar) from_buffer->byte_at(index)) & 0xff; 442 if (c == from_char) { 443 c = to_char; 444 } 445 if (!to_is_latin1) { 446 to_buffer->char_at_put(index, c); 447 } else { 448 to_buffer->byte_at_put(index, (jbyte) c); 449 } 450 } 451 return string; 452 } 453 454 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 455 typeArrayOop value = java_lang_String::value(java_string); 456 length = java_lang_String::length(java_string); 457 bool is_latin1 = java_lang_String::is_latin1(java_string); 458 459 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 460 if (result != NULL) { 461 if (!is_latin1) { 462 for (int index = 0; index < length; index++) { 463 result[index] = value->char_at(index); 464 } 465 } else { 466 for (int index = 0; index < length; index++) { 467 result[index] = ((jchar) value->byte_at(index)) & 0xff; 468 } 469 } 470 } else { 471 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 472 } 473 return result; 474 } 475 476 unsigned int java_lang_String::hash_code(oop java_string) { 477 int length = java_lang_String::length(java_string); 478 // Zero length string will hash to zero with String.hashCode() function. 479 if (length == 0) return 0; 480 481 typeArrayOop value = java_lang_String::value(java_string); 482 bool is_latin1 = java_lang_String::is_latin1(java_string); 483 484 if (is_latin1) { 485 return java_lang_String::hash_code(value->byte_at_addr(0), length); 486 } else { 487 return java_lang_String::hash_code(value->char_at_addr(0), length); 488 } 489 } 490 491 char* java_lang_String::as_quoted_ascii(oop java_string) { 492 typeArrayOop value = java_lang_String::value(java_string); 493 int length = java_lang_String::length(java_string); 494 bool is_latin1 = java_lang_String::is_latin1(java_string); 495 496 if (length == 0) return NULL; 497 498 char* result; 499 int result_length; 500 if (!is_latin1) { 501 jchar* base = value->char_at_addr(0); 502 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 503 result = NEW_RESOURCE_ARRAY(char, result_length); 504 UNICODE::as_quoted_ascii(base, length, result, result_length); 505 } else { 506 jbyte* base = value->byte_at_addr(0); 507 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 508 result = NEW_RESOURCE_ARRAY(char, result_length); 509 UNICODE::as_quoted_ascii(base, length, result, result_length); 510 } 511 assert(result_length >= length + 1, "must not be shorter"); 512 assert(result_length == (int)strlen(result) + 1, "must match"); 513 return result; 514 } 515 516 unsigned int java_lang_String::hash_string(oop java_string) { 517 int length = java_lang_String::length(java_string); 518 // Zero length string doesn't necessarily hash to zero. 519 if (length == 0) { 520 return StringTable::hash_string((jchar*) NULL, 0); 521 } 522 523 typeArrayOop value = java_lang_String::value(java_string); 524 bool is_latin1 = java_lang_String::is_latin1(java_string); 525 if (is_latin1) { 526 return StringTable::hash_string(value->byte_at_addr(0), length); 527 } else { 528 return StringTable::hash_string(value->char_at_addr(0), length); 529 } 530 } 531 532 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 533 oop obj = java_string(); 534 typeArrayOop value = java_lang_String::value(obj); 535 int length = java_lang_String::length(obj); 536 bool is_latin1 = java_lang_String::is_latin1(obj); 537 if (!is_latin1) { 538 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 539 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 540 return sym; 541 } else { 542 ResourceMark rm; 543 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 544 const char* base = UNICODE::as_utf8(position, length); 545 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 546 return sym; 547 } 548 } 549 550 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 if (!is_latin1) { 555 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 556 return SymbolTable::probe_unicode(base, length); 557 } else { 558 ResourceMark rm; 559 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 560 const char* base = UNICODE::as_utf8(position, length); 561 return SymbolTable::probe(base, length); 562 } 563 } 564 565 int java_lang_String::utf8_length(oop java_string) { 566 typeArrayOop value = java_lang_String::value(java_string); 567 int length = java_lang_String::length(java_string); 568 bool is_latin1 = java_lang_String::is_latin1(java_string); 569 if (length == 0) { 570 return 0; 571 } 572 if (!is_latin1) { 573 return UNICODE::utf8_length(value->char_at_addr(0), length); 574 } else { 575 return UNICODE::utf8_length(value->byte_at_addr(0), length); 576 } 577 } 578 579 char* java_lang_String::as_utf8_string(oop java_string) { 580 typeArrayOop value = java_lang_String::value(java_string); 581 int length = java_lang_String::length(java_string); 582 bool is_latin1 = java_lang_String::is_latin1(java_string); 583 if (!is_latin1) { 584 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 585 return UNICODE::as_utf8(position, length); 586 } else { 587 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 588 return UNICODE::as_utf8(position, length); 589 } 590 } 591 592 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 593 typeArrayOop value = java_lang_String::value(java_string); 594 int length = java_lang_String::length(java_string); 595 bool is_latin1 = java_lang_String::is_latin1(java_string); 596 if (!is_latin1) { 597 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 598 return UNICODE::as_utf8(position, length, buf, buflen); 599 } else { 600 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 601 return UNICODE::as_utf8(position, length, buf, buflen); 602 } 603 } 604 605 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 606 typeArrayOop value = java_lang_String::value(java_string); 607 int length = java_lang_String::length(java_string); 608 assert(start + len <= length, "just checking"); 609 bool is_latin1 = java_lang_String::is_latin1(java_string); 610 if (!is_latin1) { 611 jchar* position = value->char_at_addr(start); 612 return UNICODE::as_utf8(position, len); 613 } else { 614 jbyte* position = value->byte_at_addr(start); 615 return UNICODE::as_utf8(position, len); 616 } 617 } 618 619 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 620 typeArrayOop value = java_lang_String::value(java_string); 621 int length = java_lang_String::length(java_string); 622 assert(start + len <= length, "just checking"); 623 bool is_latin1 = java_lang_String::is_latin1(java_string); 624 if (!is_latin1) { 625 jchar* position = value->char_at_addr(start); 626 return UNICODE::as_utf8(position, len, buf, buflen); 627 } else { 628 jbyte* position = value->byte_at_addr(start); 629 return UNICODE::as_utf8(position, len, buf, buflen); 630 } 631 } 632 633 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 634 assert(java_string->klass() == SystemDictionary::String_klass(), 635 "must be java_string"); 636 typeArrayOop value = java_lang_String::value(java_string); 637 int length = java_lang_String::length(java_string); 638 if (length != len) { 639 return false; 640 } 641 bool is_latin1 = java_lang_String::is_latin1(java_string); 642 if (!is_latin1) { 643 for (int i = 0; i < len; i++) { 644 if (value->char_at(i) != chars[i]) { 645 return false; 646 } 647 } 648 } else { 649 for (int i = 0; i < len; i++) { 650 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 651 return false; 652 } 653 } 654 } 655 return true; 656 } 657 658 bool java_lang_String::equals(oop str1, oop str2) { 659 assert(str1->klass() == SystemDictionary::String_klass(), 660 "must be java String"); 661 assert(str2->klass() == SystemDictionary::String_klass(), 662 "must be java String"); 663 typeArrayOop value1 = java_lang_String::value(str1); 664 int length1 = java_lang_String::length(str1); 665 bool is_latin1 = java_lang_String::is_latin1(str1); 666 typeArrayOop value2 = java_lang_String::value(str2); 667 int length2 = java_lang_String::length(str2); 668 bool is_latin2 = java_lang_String::is_latin1(str2); 669 670 if ((length1 != length2) || (is_latin1 != is_latin2)) { 671 // Strings of different size or with different 672 // coders are never equal. 673 return false; 674 } 675 int blength1 = value1->length(); 676 for (int i = 0; i < value1->length(); i++) { 677 if (value1->byte_at(i) != value2->byte_at(i)) { 678 return false; 679 } 680 } 681 return true; 682 } 683 684 void java_lang_String::print(oop java_string, outputStream* st) { 685 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 686 typeArrayOop value = java_lang_String::value(java_string); 687 688 if (value == NULL) { 689 // This can happen if, e.g., printing a String 690 // object before its initializer has been called 691 st->print("NULL"); 692 return; 693 } 694 695 int length = java_lang_String::length(java_string); 696 bool is_latin1 = java_lang_String::is_latin1(java_string); 697 698 st->print("\""); 699 for (int index = 0; index < length; index++) { 700 st->print("%c", (!is_latin1) ? value->char_at(index) : 701 ((jchar) value->byte_at(index)) & 0xff ); 702 } 703 st->print("\""); 704 } 705 706 707 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 708 assert(mirror.not_null() && fd->is_static(), "just checking"); 709 if (fd->has_initial_value()) { 710 BasicType t = fd->field_type(); 711 switch (t) { 712 case T_BYTE: 713 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 714 break; 715 case T_BOOLEAN: 716 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 717 break; 718 case T_CHAR: 719 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 720 break; 721 case T_SHORT: 722 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 723 break; 724 case T_INT: 725 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 726 break; 727 case T_FLOAT: 728 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 729 break; 730 case T_DOUBLE: 731 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 732 break; 733 case T_LONG: 734 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 735 break; 736 case T_OBJECT: 737 { 738 #ifdef ASSERT 739 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 740 assert(fd->signature() == sym, "just checking"); 741 #endif 742 oop string = fd->string_initial_value(CHECK); 743 mirror()->obj_field_put(fd->offset(), string); 744 } 745 break; 746 default: 747 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 748 "Illegal ConstantValue attribute in class file"); 749 } 750 } 751 } 752 753 754 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 755 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 756 757 // If the offset was read from the shared archive, it was fixed up already 758 if (!k->is_shared()) { 759 if (k->is_instance_klass()) { 760 // During bootstrap, java.lang.Class wasn't loaded so static field 761 // offsets were computed without the size added it. Go back and 762 // update all the static field offsets to included the size. 763 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 764 if (fs.access_flags().is_static()) { 765 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 766 fs.set_offset(real_offset); 767 } 768 } 769 } 770 } 771 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 772 } 773 774 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 775 Handle mirror, 776 Handle protection_domain, 777 TRAPS) { 778 // Allocate a simple java object for a lock. 779 // This needs to be a java object because during class initialization 780 // it can be held across a java call. 781 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 782 set_init_lock(mirror(), r); 783 784 // Set protection domain also 785 set_protection_domain(mirror(), protection_domain()); 786 787 // Initialize static fields 788 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 789 } 790 791 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 792 Handle protection_domain, TRAPS) { 793 assert(k->java_mirror() == NULL, "should only assign mirror once"); 794 // Use this moment of initialization to cache modifier_flags also, 795 // to support Class.getModifiers(). Instance classes recalculate 796 // the cached flags after the class file is parsed, but before the 797 // class is put into the system dictionary. 798 int computed_modifiers = k->compute_modifier_flags(CHECK); 799 k->set_modifier_flags(computed_modifiers); 800 // Class_klass has to be loaded because it is used to allocate 801 // the mirror. 802 if (SystemDictionary::Class_klass_loaded()) { 803 // Allocate mirror (java.lang.Class instance) 804 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 805 806 // Setup indirection from mirror->klass 807 if (!k.is_null()) { 808 java_lang_Class::set_klass(mirror(), k()); 809 } 810 811 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 812 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 813 814 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 815 816 // It might also have a component mirror. This mirror must already exist. 817 if (k->is_array_klass()) { 818 Handle comp_mirror; 819 if (k->is_typeArray_klass()) { 820 BasicType type = TypeArrayKlass::cast(k())->element_type(); 821 comp_mirror = Universe::java_mirror(type); 822 } else { 823 assert(k->is_objArray_klass(), "Must be"); 824 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 825 assert(element_klass != NULL, "Must have an element klass"); 826 comp_mirror = element_klass->java_mirror(); 827 } 828 assert(comp_mirror.not_null(), "must have a mirror"); 829 830 // Two-way link between the array klass and its component mirror: 831 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 832 set_component_mirror(mirror(), comp_mirror()); 833 set_array_klass(comp_mirror(), k()); 834 } else { 835 assert(k->is_instance_klass(), "Must be"); 836 837 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 838 if (HAS_PENDING_EXCEPTION) { 839 // If any of the fields throws an exception like OOM remove the klass field 840 // from the mirror so GC doesn't follow it after the klass has been deallocated. 841 // This mirror looks like a primitive type, which logically it is because it 842 // it represents no class. 843 java_lang_Class::set_klass(mirror(), NULL); 844 return; 845 } 846 } 847 848 // set the classLoader field in the java_lang_Class instance 849 assert(class_loader() == k->class_loader(), "should be same"); 850 set_class_loader(mirror(), class_loader()); 851 852 // Setup indirection from klass->mirror last 853 // after any exceptions can happen during allocations. 854 if (!k.is_null()) { 855 k->set_java_mirror(mirror()); 856 } 857 } else { 858 if (fixup_mirror_list() == NULL) { 859 GrowableArray<Klass*>* list = 860 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 861 set_fixup_mirror_list(list); 862 } 863 fixup_mirror_list()->push(k()); 864 } 865 } 866 867 868 int java_lang_Class::oop_size(oop java_class) { 869 assert(_oop_size_offset != 0, "must be set"); 870 return java_class->int_field(_oop_size_offset); 871 } 872 void java_lang_Class::set_oop_size(oop java_class, int size) { 873 assert(_oop_size_offset != 0, "must be set"); 874 java_class->int_field_put(_oop_size_offset, size); 875 } 876 int java_lang_Class::static_oop_field_count(oop java_class) { 877 assert(_static_oop_field_count_offset != 0, "must be set"); 878 return java_class->int_field(_static_oop_field_count_offset); 879 } 880 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 881 assert(_static_oop_field_count_offset != 0, "must be set"); 882 java_class->int_field_put(_static_oop_field_count_offset, size); 883 } 884 885 oop java_lang_Class::protection_domain(oop java_class) { 886 assert(_protection_domain_offset != 0, "must be set"); 887 return java_class->obj_field(_protection_domain_offset); 888 } 889 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 890 assert(_protection_domain_offset != 0, "must be set"); 891 java_class->obj_field_put(_protection_domain_offset, pd); 892 } 893 894 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 895 assert(_component_mirror_offset != 0, "must be set"); 896 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 897 } 898 oop java_lang_Class::component_mirror(oop java_class) { 899 assert(_component_mirror_offset != 0, "must be set"); 900 return java_class->obj_field(_component_mirror_offset); 901 } 902 903 oop java_lang_Class::init_lock(oop java_class) { 904 assert(_init_lock_offset != 0, "must be set"); 905 return java_class->obj_field(_init_lock_offset); 906 } 907 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 908 assert(_init_lock_offset != 0, "must be set"); 909 java_class->obj_field_put(_init_lock_offset, init_lock); 910 } 911 912 objArrayOop java_lang_Class::signers(oop java_class) { 913 assert(_signers_offset != 0, "must be set"); 914 return (objArrayOop)java_class->obj_field(_signers_offset); 915 } 916 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 917 assert(_signers_offset != 0, "must be set"); 918 java_class->obj_field_put(_signers_offset, (oop)signers); 919 } 920 921 922 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 923 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 924 if (_class_loader_offset != 0) { 925 java_class->obj_field_put(_class_loader_offset, loader); 926 } 927 } 928 929 oop java_lang_Class::class_loader(oop java_class) { 930 assert(_class_loader_offset != 0, "must be set"); 931 return java_class->obj_field(_class_loader_offset); 932 } 933 934 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 935 // This should be improved by adding a field at the Java level or by 936 // introducing a new VM klass (see comment in ClassFileParser) 937 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 938 if (type != T_VOID) { 939 Klass* aklass = Universe::typeArrayKlassObj(type); 940 assert(aklass != NULL, "correct bootstrap"); 941 set_array_klass(java_class, aklass); 942 } 943 #ifdef ASSERT 944 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 945 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 946 #endif 947 return java_class; 948 } 949 950 951 Klass* java_lang_Class::as_Klass(oop java_class) { 952 //%note memory_2 953 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 954 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 955 assert(k == NULL || k->is_klass(), "type check"); 956 return k; 957 } 958 959 960 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 961 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 962 java_class->metadata_field_put(_klass_offset, klass); 963 } 964 965 966 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 967 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 968 Symbol* name = NULL; 969 bool is_instance = false; 970 if (is_primitive(java_class)) { 971 name = vmSymbols::type_signature(primitive_type(java_class)); 972 } else { 973 Klass* k = as_Klass(java_class); 974 is_instance = k->is_instance_klass(); 975 name = k->name(); 976 } 977 if (name == NULL) { 978 st->print("<null>"); 979 return; 980 } 981 if (is_instance) st->print("L"); 982 st->write((char*) name->base(), (int) name->utf8_length()); 983 if (is_instance) st->print(";"); 984 } 985 986 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 987 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 988 Symbol* name; 989 if (is_primitive(java_class)) { 990 name = vmSymbols::type_signature(primitive_type(java_class)); 991 // Because this can create a new symbol, the caller has to decrement 992 // the refcount, so make adjustment here and below for symbols returned 993 // that are not created or incremented due to a successful lookup. 994 name->increment_refcount(); 995 } else { 996 Klass* k = as_Klass(java_class); 997 if (!k->is_instance_klass()) { 998 name = k->name(); 999 name->increment_refcount(); 1000 } else { 1001 ResourceMark rm; 1002 const char* sigstr = k->signature_name(); 1003 int siglen = (int) strlen(sigstr); 1004 if (!intern_if_not_found) { 1005 name = SymbolTable::probe(sigstr, siglen); 1006 } else { 1007 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1008 } 1009 } 1010 } 1011 return name; 1012 } 1013 1014 // Returns the Java name for this Java mirror (Resource allocated) 1015 // See Klass::external_name(). 1016 // For primitive type Java mirrors, its type name is returned. 1017 const char* java_lang_Class::as_external_name(oop java_class) { 1018 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1019 const char* name = NULL; 1020 if (is_primitive(java_class)) { 1021 name = type2name(primitive_type(java_class)); 1022 } else { 1023 name = as_Klass(java_class)->external_name(); 1024 } 1025 if (name == NULL) { 1026 name = "<null>"; 1027 } 1028 return name; 1029 } 1030 1031 Klass* java_lang_Class::array_klass(oop java_class) { 1032 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1033 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1034 return k; 1035 } 1036 1037 1038 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1039 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1040 java_class->metadata_field_put(_array_klass_offset, klass); 1041 } 1042 1043 1044 bool java_lang_Class::is_primitive(oop java_class) { 1045 // should assert: 1046 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1047 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1048 1049 #ifdef ASSERT 1050 if (is_primitive) { 1051 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1052 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1053 "Should be either the T_VOID primitive or a java primitive"); 1054 } 1055 #endif 1056 1057 return is_primitive; 1058 } 1059 1060 1061 BasicType java_lang_Class::primitive_type(oop java_class) { 1062 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1063 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1064 BasicType type = T_VOID; 1065 if (ak != NULL) { 1066 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1067 type = ArrayKlass::cast(ak)->element_type(); 1068 } else { 1069 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1070 } 1071 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1072 return type; 1073 } 1074 1075 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1076 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1077 if (is_primitive(java_class)) { 1078 if (reference_klass != NULL) 1079 (*reference_klass) = NULL; 1080 return primitive_type(java_class); 1081 } else { 1082 if (reference_klass != NULL) 1083 (*reference_klass) = as_Klass(java_class); 1084 return T_OBJECT; 1085 } 1086 } 1087 1088 1089 oop java_lang_Class::primitive_mirror(BasicType t) { 1090 oop mirror = Universe::java_mirror(t); 1091 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1092 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1093 return mirror; 1094 } 1095 1096 bool java_lang_Class::offsets_computed = false; 1097 int java_lang_Class::classRedefinedCount_offset = -1; 1098 1099 void java_lang_Class::compute_offsets() { 1100 assert(!offsets_computed, "offsets should be initialized only once"); 1101 offsets_computed = true; 1102 1103 Klass* k = SystemDictionary::Class_klass(); 1104 // The classRedefinedCount field is only present starting in 1.5, 1105 // so don't go fatal. 1106 compute_optional_offset(classRedefinedCount_offset, 1107 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1108 1109 // Needs to be optional because the old build runs Queens during bootstrapping 1110 // and jdk8-9 doesn't have coordinated pushes yet. 1111 compute_optional_offset(_class_loader_offset, 1112 k, vmSymbols::classLoader_name(), 1113 vmSymbols::classloader_signature()); 1114 1115 compute_offset(_component_mirror_offset, 1116 k, vmSymbols::componentType_name(), 1117 vmSymbols::class_signature()); 1118 1119 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1120 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1121 // GC treats them the same. 1122 _init_lock_offset = _component_mirror_offset; 1123 1124 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1125 } 1126 1127 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1128 if (classRedefinedCount_offset == -1) { 1129 // If we don't have an offset for it then just return -1 as a marker. 1130 return -1; 1131 } 1132 1133 return the_class_mirror->int_field(classRedefinedCount_offset); 1134 } 1135 1136 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1137 if (classRedefinedCount_offset == -1) { 1138 // If we don't have an offset for it then nothing to set. 1139 return; 1140 } 1141 1142 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1143 } 1144 1145 1146 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1147 // platform thread structure, and a eetop offset which was used for thread 1148 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1149 // merged, so in the HotSpot VM we just use the eetop field for the thread 1150 // instead of the privateInfo_offset. 1151 // 1152 // Note: The stackSize field is only present starting in 1.4. 1153 1154 int java_lang_Thread::_name_offset = 0; 1155 int java_lang_Thread::_group_offset = 0; 1156 int java_lang_Thread::_contextClassLoader_offset = 0; 1157 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1158 int java_lang_Thread::_priority_offset = 0; 1159 int java_lang_Thread::_eetop_offset = 0; 1160 int java_lang_Thread::_daemon_offset = 0; 1161 int java_lang_Thread::_stillborn_offset = 0; 1162 int java_lang_Thread::_stackSize_offset = 0; 1163 int java_lang_Thread::_tid_offset = 0; 1164 int java_lang_Thread::_thread_status_offset = 0; 1165 int java_lang_Thread::_park_blocker_offset = 0; 1166 int java_lang_Thread::_park_event_offset = 0 ; 1167 1168 1169 void java_lang_Thread::compute_offsets() { 1170 assert(_group_offset == 0, "offsets should be initialized only once"); 1171 1172 Klass* k = SystemDictionary::Thread_klass(); 1173 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1174 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1175 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1176 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1177 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1178 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1179 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1180 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1181 // The stackSize field is only present starting in 1.4, so don't go fatal. 1182 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1183 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1184 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1185 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1186 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1187 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1188 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1189 vmSymbols::long_signature()); 1190 } 1191 1192 1193 JavaThread* java_lang_Thread::thread(oop java_thread) { 1194 return (JavaThread*)java_thread->address_field(_eetop_offset); 1195 } 1196 1197 1198 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1199 java_thread->address_field_put(_eetop_offset, (address)thread); 1200 } 1201 1202 1203 oop java_lang_Thread::name(oop java_thread) { 1204 return java_thread->obj_field(_name_offset); 1205 } 1206 1207 1208 void java_lang_Thread::set_name(oop java_thread, oop name) { 1209 java_thread->obj_field_put(_name_offset, name); 1210 } 1211 1212 1213 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1214 return (ThreadPriority)java_thread->int_field(_priority_offset); 1215 } 1216 1217 1218 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1219 java_thread->int_field_put(_priority_offset, priority); 1220 } 1221 1222 1223 oop java_lang_Thread::threadGroup(oop java_thread) { 1224 return java_thread->obj_field(_group_offset); 1225 } 1226 1227 1228 bool java_lang_Thread::is_stillborn(oop java_thread) { 1229 return java_thread->bool_field(_stillborn_offset) != 0; 1230 } 1231 1232 1233 // We never have reason to turn the stillborn bit off 1234 void java_lang_Thread::set_stillborn(oop java_thread) { 1235 java_thread->bool_field_put(_stillborn_offset, true); 1236 } 1237 1238 1239 bool java_lang_Thread::is_alive(oop java_thread) { 1240 JavaThread* thr = java_lang_Thread::thread(java_thread); 1241 return (thr != NULL); 1242 } 1243 1244 1245 bool java_lang_Thread::is_daemon(oop java_thread) { 1246 return java_thread->bool_field(_daemon_offset) != 0; 1247 } 1248 1249 1250 void java_lang_Thread::set_daemon(oop java_thread) { 1251 java_thread->bool_field_put(_daemon_offset, true); 1252 } 1253 1254 oop java_lang_Thread::context_class_loader(oop java_thread) { 1255 return java_thread->obj_field(_contextClassLoader_offset); 1256 } 1257 1258 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1259 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1260 } 1261 1262 1263 jlong java_lang_Thread::stackSize(oop java_thread) { 1264 if (_stackSize_offset > 0) { 1265 return java_thread->long_field(_stackSize_offset); 1266 } else { 1267 return 0; 1268 } 1269 } 1270 1271 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1272 void java_lang_Thread::set_thread_status(oop java_thread, 1273 java_lang_Thread::ThreadStatus status) { 1274 // The threadStatus is only present starting in 1.5 1275 if (_thread_status_offset > 0) { 1276 java_thread->int_field_put(_thread_status_offset, status); 1277 } 1278 } 1279 1280 // Read thread status value from threadStatus field in java.lang.Thread java class. 1281 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1282 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1283 JavaThread::current()->thread_state() == _thread_in_vm, 1284 "Java Thread is not running in vm"); 1285 // The threadStatus is only present starting in 1.5 1286 if (_thread_status_offset > 0) { 1287 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1288 } else { 1289 // All we can easily figure out is if it is alive, but that is 1290 // enough info for a valid unknown status. 1291 // These aren't restricted to valid set ThreadStatus values, so 1292 // use JVMTI values and cast. 1293 JavaThread* thr = java_lang_Thread::thread(java_thread); 1294 if (thr == NULL) { 1295 // the thread hasn't run yet or is in the process of exiting 1296 return NEW; 1297 } 1298 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1299 } 1300 } 1301 1302 1303 jlong java_lang_Thread::thread_id(oop java_thread) { 1304 // The thread ID field is only present starting in 1.5 1305 if (_tid_offset > 0) { 1306 return java_thread->long_field(_tid_offset); 1307 } else { 1308 return 0; 1309 } 1310 } 1311 1312 oop java_lang_Thread::park_blocker(oop java_thread) { 1313 assert(JDK_Version::current().supports_thread_park_blocker() && 1314 _park_blocker_offset != 0, "Must support parkBlocker field"); 1315 1316 if (_park_blocker_offset > 0) { 1317 return java_thread->obj_field(_park_blocker_offset); 1318 } 1319 1320 return NULL; 1321 } 1322 1323 jlong java_lang_Thread::park_event(oop java_thread) { 1324 if (_park_event_offset > 0) { 1325 return java_thread->long_field(_park_event_offset); 1326 } 1327 return 0; 1328 } 1329 1330 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1331 if (_park_event_offset > 0) { 1332 java_thread->long_field_put(_park_event_offset, ptr); 1333 return true; 1334 } 1335 return false; 1336 } 1337 1338 1339 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1340 assert(_thread_status_offset != 0, "Must have thread status"); 1341 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1342 switch (status) { 1343 case NEW : return "NEW"; 1344 case RUNNABLE : return "RUNNABLE"; 1345 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1346 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1347 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1348 case PARKED : return "WAITING (parking)"; 1349 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1350 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1351 case TERMINATED : return "TERMINATED"; 1352 default : return "UNKNOWN"; 1353 }; 1354 } 1355 int java_lang_ThreadGroup::_parent_offset = 0; 1356 int java_lang_ThreadGroup::_name_offset = 0; 1357 int java_lang_ThreadGroup::_threads_offset = 0; 1358 int java_lang_ThreadGroup::_groups_offset = 0; 1359 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1360 int java_lang_ThreadGroup::_destroyed_offset = 0; 1361 int java_lang_ThreadGroup::_daemon_offset = 0; 1362 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1363 int java_lang_ThreadGroup::_nthreads_offset = 0; 1364 int java_lang_ThreadGroup::_ngroups_offset = 0; 1365 1366 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1367 assert(java_thread_group->is_oop(), "thread group must be oop"); 1368 return java_thread_group->obj_field(_parent_offset); 1369 } 1370 1371 // ("name as oop" accessor is not necessary) 1372 1373 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1374 oop name = java_thread_group->obj_field(_name_offset); 1375 // ThreadGroup.name can be null 1376 if (name != NULL) { 1377 return java_lang_String::as_utf8_string(name); 1378 } 1379 return NULL; 1380 } 1381 1382 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1383 assert(java_thread_group->is_oop(), "thread group must be oop"); 1384 return java_thread_group->int_field(_nthreads_offset); 1385 } 1386 1387 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1388 oop threads = java_thread_group->obj_field(_threads_offset); 1389 assert(threads != NULL, "threadgroups should have threads"); 1390 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1391 return objArrayOop(threads); 1392 } 1393 1394 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1395 assert(java_thread_group->is_oop(), "thread group must be oop"); 1396 return java_thread_group->int_field(_ngroups_offset); 1397 } 1398 1399 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1400 oop groups = java_thread_group->obj_field(_groups_offset); 1401 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1402 return objArrayOop(groups); 1403 } 1404 1405 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1406 assert(java_thread_group->is_oop(), "thread group must be oop"); 1407 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1408 } 1409 1410 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1411 assert(java_thread_group->is_oop(), "thread group must be oop"); 1412 return java_thread_group->bool_field(_destroyed_offset) != 0; 1413 } 1414 1415 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1416 assert(java_thread_group->is_oop(), "thread group must be oop"); 1417 return java_thread_group->bool_field(_daemon_offset) != 0; 1418 } 1419 1420 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1421 assert(java_thread_group->is_oop(), "thread group must be oop"); 1422 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1423 } 1424 1425 void java_lang_ThreadGroup::compute_offsets() { 1426 assert(_parent_offset == 0, "offsets should be initialized only once"); 1427 1428 Klass* k = SystemDictionary::ThreadGroup_klass(); 1429 1430 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1431 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1432 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1433 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1434 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1435 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1436 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1437 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1438 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1439 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1440 } 1441 1442 oop java_lang_Throwable::unassigned_stacktrace() { 1443 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1444 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1445 if (UseCompressedOops) { 1446 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1447 } else { 1448 return oopDesc::load_decode_heap_oop((oop*)addr); 1449 } 1450 } 1451 1452 oop java_lang_Throwable::backtrace(oop throwable) { 1453 return throwable->obj_field_acquire(backtrace_offset); 1454 } 1455 1456 1457 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1458 throwable->release_obj_field_put(backtrace_offset, value); 1459 } 1460 1461 1462 oop java_lang_Throwable::message(oop throwable) { 1463 return throwable->obj_field(detailMessage_offset); 1464 } 1465 1466 1467 oop java_lang_Throwable::message(Handle throwable) { 1468 return throwable->obj_field(detailMessage_offset); 1469 } 1470 1471 1472 // Return Symbol for detailed_message or NULL 1473 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1474 PRESERVE_EXCEPTION_MARK; // Keep original exception 1475 oop detailed_message = java_lang_Throwable::message(throwable); 1476 if (detailed_message != NULL) { 1477 return java_lang_String::as_symbol(detailed_message, THREAD); 1478 } 1479 return NULL; 1480 } 1481 1482 void java_lang_Throwable::set_message(oop throwable, oop value) { 1483 throwable->obj_field_put(detailMessage_offset, value); 1484 } 1485 1486 1487 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1488 throwable->obj_field_put(stackTrace_offset, st_element_array); 1489 } 1490 1491 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1492 set_stacktrace(throwable, NULL); 1493 } 1494 1495 1496 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1497 ResourceMark rm; 1498 Klass* k = throwable->klass(); 1499 assert(k != NULL, "just checking"); 1500 st->print("%s", k->external_name()); 1501 oop msg = message(throwable); 1502 if (msg != NULL) { 1503 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1504 } 1505 } 1506 1507 // After this many redefines, the stack trace is unreliable. 1508 const int MAX_VERSION = USHRT_MAX; 1509 1510 static inline bool version_matches(Method* method, int version) { 1511 assert(version < MAX_VERSION, "version is too big"); 1512 return method != NULL && (method->constants()->version() == version); 1513 } 1514 1515 // This class provides a simple wrapper over the internal structure of 1516 // exception backtrace to insulate users of the backtrace from needing 1517 // to know what it looks like. 1518 class BacktraceBuilder: public StackObj { 1519 private: 1520 Handle _backtrace; 1521 objArrayOop _head; 1522 typeArrayOop _methods; 1523 typeArrayOop _bcis; 1524 objArrayOop _mirrors; 1525 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1526 int _index; 1527 NoSafepointVerifier _nsv; 1528 1529 public: 1530 1531 enum { 1532 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1533 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1534 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1535 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1536 trace_next_offset = java_lang_Throwable::trace_next_offset, 1537 trace_size = java_lang_Throwable::trace_size, 1538 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1539 }; 1540 1541 // get info out of chunks 1542 static typeArrayOop get_methods(objArrayHandle chunk) { 1543 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1544 assert(methods != NULL, "method array should be initialized in backtrace"); 1545 return methods; 1546 } 1547 static typeArrayOop get_bcis(objArrayHandle chunk) { 1548 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1549 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1550 return bcis; 1551 } 1552 static objArrayOop get_mirrors(objArrayHandle chunk) { 1553 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1554 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1555 return mirrors; 1556 } 1557 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1558 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1559 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1560 return cprefs; 1561 } 1562 1563 // constructor for new backtrace 1564 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1565 expand(CHECK); 1566 _backtrace = _head; 1567 _index = 0; 1568 } 1569 1570 BacktraceBuilder(objArrayHandle backtrace) { 1571 _methods = get_methods(backtrace); 1572 _bcis = get_bcis(backtrace); 1573 _mirrors = get_mirrors(backtrace); 1574 _cprefs = get_cprefs(backtrace); 1575 assert(_methods->length() == _bcis->length() && 1576 _methods->length() == _mirrors->length(), 1577 "method and source information arrays should match"); 1578 1579 // head is the preallocated backtrace 1580 _backtrace = _head = backtrace(); 1581 _index = 0; 1582 } 1583 1584 void expand(TRAPS) { 1585 objArrayHandle old_head(THREAD, _head); 1586 PauseNoSafepointVerifier pnsv(&_nsv); 1587 1588 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1589 objArrayHandle new_head(THREAD, head); 1590 1591 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1592 typeArrayHandle new_methods(THREAD, methods); 1593 1594 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1595 typeArrayHandle new_bcis(THREAD, bcis); 1596 1597 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1598 objArrayHandle new_mirrors(THREAD, mirrors); 1599 1600 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1601 typeArrayHandle new_cprefs(THREAD, cprefs); 1602 1603 if (!old_head.is_null()) { 1604 old_head->obj_at_put(trace_next_offset, new_head()); 1605 } 1606 new_head->obj_at_put(trace_methods_offset, new_methods()); 1607 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1608 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1609 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1610 1611 _head = new_head(); 1612 _methods = new_methods(); 1613 _bcis = new_bcis(); 1614 _mirrors = new_mirrors(); 1615 _cprefs = new_cprefs(); 1616 _index = 0; 1617 } 1618 1619 oop backtrace() { 1620 return _backtrace(); 1621 } 1622 1623 inline void push(Method* method, int bci, TRAPS) { 1624 // Smear the -1 bci to 0 since the array only holds unsigned 1625 // shorts. The later line number lookup would just smear the -1 1626 // to a 0 even if it could be recorded. 1627 if (bci == SynchronizationEntryBCI) bci = 0; 1628 1629 if (_index >= trace_chunk_size) { 1630 methodHandle mhandle(THREAD, method); 1631 expand(CHECK); 1632 method = mhandle(); 1633 } 1634 1635 _methods->short_at_put(_index, method->orig_method_idnum()); 1636 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1637 _cprefs->short_at_put(_index, method->name_index()); 1638 1639 // We need to save the mirrors in the backtrace to keep the class 1640 // from being unloaded while we still have this stack trace. 1641 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1642 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1643 _index++; 1644 } 1645 1646 }; 1647 1648 // Print stack trace element to resource allocated buffer 1649 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1650 int method_id, int version, int bci, int cpref) { 1651 1652 // Get strings and string lengths 1653 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1654 const char* klass_name = holder->external_name(); 1655 int buf_len = (int)strlen(klass_name); 1656 1657 Method* method = holder->method_with_orig_idnum(method_id, version); 1658 1659 // The method can be NULL if the requested class version is gone 1660 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1661 char* method_name = sym->as_C_string(); 1662 buf_len += (int)strlen(method_name); 1663 1664 char* source_file_name = NULL; 1665 Symbol* source = Backtrace::get_source_file_name(holder, version); 1666 if (source != NULL) { 1667 source_file_name = source->as_C_string(); 1668 buf_len += (int)strlen(source_file_name); 1669 } 1670 1671 // Allocate temporary buffer with extra space for formatting and line number 1672 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1673 1674 // Print stack trace line in buffer 1675 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1676 1677 if (!version_matches(method, version)) { 1678 strcat(buf, "(Redefined)"); 1679 } else { 1680 int line_number = Backtrace::get_line_number(method, bci); 1681 if (line_number == -2) { 1682 strcat(buf, "(Native Method)"); 1683 } else { 1684 if (source_file_name != NULL && (line_number != -1)) { 1685 // Sourcename and linenumber 1686 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1687 } else if (source_file_name != NULL) { 1688 // Just sourcename 1689 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1690 } else { 1691 // Neither sourcename nor linenumber 1692 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1693 } 1694 nmethod* nm = method->code(); 1695 if (WizardMode && nm != NULL) { 1696 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1697 } 1698 } 1699 } 1700 1701 return buf; 1702 } 1703 1704 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1705 int method_id, int version, int bci, int cpref) { 1706 ResourceMark rm; 1707 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1708 st->print_cr("%s", buf); 1709 } 1710 1711 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1712 Handle mirror = method->method_holder()->java_mirror(); 1713 int method_id = method->orig_method_idnum(); 1714 int version = method->constants()->version(); 1715 int cpref = method->name_index(); 1716 print_stack_element(st, mirror, method_id, version, bci, cpref); 1717 } 1718 1719 const char* java_lang_Throwable::no_stack_trace_message() { 1720 return "\t<<no stack trace available>>"; 1721 } 1722 1723 /** 1724 * Print the throwable message and its stack trace plus all causes by walking the 1725 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1726 */ 1727 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1728 // First, print the message. 1729 print(throwable, st); 1730 st->cr(); 1731 1732 // Now print the stack trace. 1733 Thread* THREAD = Thread::current(); 1734 while (throwable.not_null()) { 1735 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1736 if (result.is_null()) { 1737 st->print_raw_cr(no_stack_trace_message()); 1738 return; 1739 } 1740 1741 while (result.not_null()) { 1742 // Get method id, bci, version and mirror from chunk 1743 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1744 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1745 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1746 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1747 1748 int length = methods()->length(); 1749 for (int index = 0; index < length; index++) { 1750 Handle mirror(THREAD, mirrors->obj_at(index)); 1751 // NULL mirror means end of stack trace 1752 if (mirror.is_null()) goto handle_cause; 1753 int method = methods->short_at(index); 1754 int version = Backtrace::version_at(bcis->int_at(index)); 1755 int bci = Backtrace::bci_at(bcis->int_at(index)); 1756 int cpref = cprefs->short_at(index); 1757 print_stack_element(st, mirror, method, version, bci, cpref); 1758 } 1759 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1760 } 1761 handle_cause: 1762 { 1763 EXCEPTION_MARK; 1764 JavaValue cause(T_OBJECT); 1765 JavaCalls::call_virtual(&cause, 1766 throwable, 1767 KlassHandle(THREAD, throwable->klass()), 1768 vmSymbols::getCause_name(), 1769 vmSymbols::void_throwable_signature(), 1770 THREAD); 1771 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1772 if (HAS_PENDING_EXCEPTION) { 1773 CLEAR_PENDING_EXCEPTION; 1774 throwable = Handle(); 1775 } else { 1776 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1777 if (throwable.not_null()) { 1778 st->print("Caused by: "); 1779 print(throwable, st); 1780 st->cr(); 1781 } 1782 } 1783 } 1784 } 1785 } 1786 1787 /** 1788 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1789 */ 1790 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1791 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1792 JavaValue result(T_VOID); 1793 JavaCalls::call_virtual(&result, 1794 throwable, 1795 KlassHandle(THREAD, SystemDictionary::Throwable_klass()), 1796 vmSymbols::printStackTrace_name(), 1797 vmSymbols::void_method_signature(), 1798 THREAD); 1799 } 1800 1801 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1802 if (!StackTraceInThrowable) return; 1803 ResourceMark rm(THREAD); 1804 1805 // Start out by clearing the backtrace for this object, in case the VM 1806 // runs out of memory while allocating the stack trace 1807 set_backtrace(throwable(), NULL); 1808 // Clear lazily constructed Java level stacktrace if refilling occurs 1809 // This is unnecessary in 1.7+ but harmless 1810 clear_stacktrace(throwable()); 1811 1812 int max_depth = MaxJavaStackTraceDepth; 1813 JavaThread* thread = (JavaThread*)THREAD; 1814 BacktraceBuilder bt(CHECK); 1815 1816 // If there is no Java frame just return the method that was being called 1817 // with bci 0 1818 if (!thread->has_last_Java_frame()) { 1819 if (max_depth >= 1 && method() != NULL) { 1820 bt.push(method(), 0, CHECK); 1821 set_backtrace(throwable(), bt.backtrace()); 1822 } 1823 return; 1824 } 1825 1826 // Instead of using vframe directly, this version of fill_in_stack_trace 1827 // basically handles everything by hand. This significantly improved the 1828 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1829 // See bug 6333838 for more details. 1830 // The "ASSERT" here is to verify this method generates the exactly same stack 1831 // trace as utilizing vframe. 1832 #ifdef ASSERT 1833 vframeStream st(thread); 1834 methodHandle st_method(THREAD, st.method()); 1835 #endif 1836 int total_count = 0; 1837 RegisterMap map(thread, false); 1838 int decode_offset = 0; 1839 nmethod* nm = NULL; 1840 bool skip_fillInStackTrace_check = false; 1841 bool skip_throwableInit_check = false; 1842 bool skip_hidden = !ShowHiddenFrames; 1843 1844 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1845 Method* method = NULL; 1846 int bci = 0; 1847 1848 // Compiled java method case. 1849 if (decode_offset != 0) { 1850 DebugInfoReadStream stream(nm, decode_offset); 1851 decode_offset = stream.read_int(); 1852 method = (Method*)nm->metadata_at(stream.read_int()); 1853 bci = stream.read_bci(); 1854 } else { 1855 if (fr.is_first_frame()) break; 1856 address pc = fr.pc(); 1857 if (fr.is_interpreted_frame()) { 1858 address bcp = fr.interpreter_frame_bcp(); 1859 method = fr.interpreter_frame_method(); 1860 bci = method->bci_from(bcp); 1861 fr = fr.sender(&map); 1862 } else { 1863 CodeBlob* cb = fr.cb(); 1864 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1865 // but non nmethod 1866 fr = fr.sender(&map); 1867 if (cb == NULL || !cb->is_nmethod()) { 1868 continue; 1869 } 1870 nm = (nmethod*)cb; 1871 if (nm->method()->is_native()) { 1872 method = nm->method(); 1873 bci = 0; 1874 } else { 1875 PcDesc* pd = nm->pc_desc_at(pc); 1876 decode_offset = pd->scope_decode_offset(); 1877 // if decode_offset is not equal to 0, it will execute the 1878 // "compiled java method case" at the beginning of the loop. 1879 continue; 1880 } 1881 } 1882 } 1883 #ifdef ASSERT 1884 assert(st_method() == method && st.bci() == bci, 1885 "Wrong stack trace"); 1886 st.next(); 1887 // vframeStream::method isn't GC-safe so store off a copy 1888 // of the Method* in case we GC. 1889 if (!st.at_end()) { 1890 st_method = st.method(); 1891 } 1892 #endif 1893 1894 // the format of the stacktrace will be: 1895 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1896 // - 0 or more <init> methods for the exception class (skipped) 1897 // - rest of the stack 1898 1899 if (!skip_fillInStackTrace_check) { 1900 if (method->name() == vmSymbols::fillInStackTrace_name() && 1901 throwable->is_a(method->method_holder())) { 1902 continue; 1903 } 1904 else { 1905 skip_fillInStackTrace_check = true; // gone past them all 1906 } 1907 } 1908 if (!skip_throwableInit_check) { 1909 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1910 1911 // skip <init> methods of the exception class and superclasses 1912 // This is simlar to classic VM. 1913 if (method->name() == vmSymbols::object_initializer_name() && 1914 throwable->is_a(method->method_holder())) { 1915 continue; 1916 } else { 1917 // there are none or we've seen them all - either way stop checking 1918 skip_throwableInit_check = true; 1919 } 1920 } 1921 if (method->is_hidden()) { 1922 if (skip_hidden) continue; 1923 } 1924 bt.push(method, bci, CHECK); 1925 total_count++; 1926 } 1927 1928 // Put completed stack trace into throwable object 1929 set_backtrace(throwable(), bt.backtrace()); 1930 } 1931 1932 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 1933 // No-op if stack trace is disabled 1934 if (!StackTraceInThrowable) { 1935 return; 1936 } 1937 1938 // Disable stack traces for some preallocated out of memory errors 1939 if (!Universe::should_fill_in_stack_trace(throwable)) { 1940 return; 1941 } 1942 1943 PRESERVE_EXCEPTION_MARK; 1944 1945 JavaThread* thread = JavaThread::active(); 1946 fill_in_stack_trace(throwable, method, thread); 1947 // ignore exceptions thrown during stack trace filling 1948 CLEAR_PENDING_EXCEPTION; 1949 } 1950 1951 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1952 // Allocate stack trace - backtrace is created but not filled in 1953 1954 // No-op if stack trace is disabled 1955 if (!StackTraceInThrowable) return; 1956 BacktraceBuilder bt(CHECK); // creates a backtrace 1957 set_backtrace(throwable(), bt.backtrace()); 1958 } 1959 1960 1961 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1962 // Fill in stack trace into preallocated backtrace (no GC) 1963 1964 // No-op if stack trace is disabled 1965 if (!StackTraceInThrowable) return; 1966 1967 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1968 1969 JavaThread* THREAD = JavaThread::current(); 1970 1971 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1972 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1973 1974 ResourceMark rm(THREAD); 1975 vframeStream st(THREAD); 1976 1977 BacktraceBuilder bt(backtrace); 1978 1979 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1980 // methods as preallocated errors aren't created by "java" code. 1981 1982 // fill in as much stack trace as possible 1983 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1984 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1985 int chunk_count = 0; 1986 1987 for (;!st.at_end(); st.next()) { 1988 bt.push(st.method(), st.bci(), CHECK); 1989 chunk_count++; 1990 1991 // Bail-out for deep stacks 1992 if (chunk_count >= max_chunks) break; 1993 } 1994 1995 // We support the Throwable immutability protocol defined for Java 7. 1996 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1997 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1998 } 1999 2000 2001 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 2002 if (throwable == NULL) { 2003 THROW_0(vmSymbols::java_lang_NullPointerException()); 2004 } 2005 objArrayOop chunk = objArrayOop(backtrace(throwable)); 2006 int depth = 0; 2007 if (chunk != NULL) { 2008 // Iterate over chunks and count full ones 2009 while (true) { 2010 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 2011 if (next == NULL) break; 2012 depth += trace_chunk_size; 2013 chunk = next; 2014 } 2015 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 2016 // Count element in remaining partial chunk. NULL value for mirror 2017 // marks the end of the stack trace elements that are saved. 2018 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2019 assert(mirrors != NULL, "sanity check"); 2020 for (int i = 0; i < mirrors->length(); i++) { 2021 if (mirrors->obj_at(i) == NULL) break; 2022 depth++; 2023 } 2024 } 2025 return depth; 2026 } 2027 2028 2029 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 2030 if (throwable == NULL) { 2031 THROW_0(vmSymbols::java_lang_NullPointerException()); 2032 } 2033 if (index < 0) { 2034 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2035 } 2036 // Compute how many chunks to skip and index into actual chunk 2037 objArrayOop chunk = objArrayOop(backtrace(throwable)); 2038 int skip_chunks = index / trace_chunk_size; 2039 int chunk_index = index % trace_chunk_size; 2040 while (chunk != NULL && skip_chunks > 0) { 2041 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 2042 skip_chunks--; 2043 } 2044 if (chunk == NULL) { 2045 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2046 } 2047 // Get method id, bci, version, mirror and cpref from chunk 2048 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 2049 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 2050 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2051 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 2052 2053 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 2054 2055 int method = methods->short_at(chunk_index); 2056 int version = Backtrace::version_at(bcis->int_at(chunk_index)); 2057 int bci = Backtrace::bci_at(bcis->int_at(chunk_index)); 2058 int cpref = cprefs->short_at(chunk_index); 2059 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 2060 2061 // Chunk can be partial full 2062 if (mirror.is_null()) { 2063 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2064 } 2065 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 2066 return element; 2067 } 2068 2069 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 2070 int version, int bci, int cpref, TRAPS) { 2071 // Allocate java.lang.StackTraceElement instance 2072 Klass* k = SystemDictionary::StackTraceElement_klass(); 2073 assert(k != NULL, "must be loaded in 1.4+"); 2074 instanceKlassHandle ik (THREAD, k); 2075 if (ik->should_be_initialized()) { 2076 ik->initialize(CHECK_0); 2077 } 2078 2079 Handle element = ik->allocate_instance_handle(CHECK_0); 2080 2081 // Fill in class name 2082 ResourceMark rm(THREAD); 2083 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2084 const char* str = holder->external_name(); 2085 oop classname = StringTable::intern((char*) str, CHECK_0); 2086 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2087 2088 Method* method = holder->method_with_orig_idnum(method_id, version); 2089 2090 // The method can be NULL if the requested class version is gone 2091 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2092 2093 // Fill in method name 2094 oop methodname = StringTable::intern(sym, CHECK_0); 2095 java_lang_StackTraceElement::set_methodName(element(), methodname); 2096 2097 if (!version_matches(method, version)) { 2098 // The method was redefined, accurate line number information isn't available 2099 java_lang_StackTraceElement::set_fileName(element(), NULL); 2100 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2101 } else { 2102 // Fill in source file name and line number. 2103 Symbol* source = Backtrace::get_source_file_name(holder, version); 2104 if (ShowHiddenFrames && source == NULL) 2105 source = vmSymbols::unknown_class_name(); 2106 oop filename = StringTable::intern(source, CHECK_0); 2107 java_lang_StackTraceElement::set_fileName(element(), filename); 2108 2109 int line_number = Backtrace::get_line_number(method, bci); 2110 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2111 } 2112 return element(); 2113 } 2114 2115 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2116 Handle mirror (THREAD, method->method_holder()->java_mirror()); 2117 int method_id = method->orig_method_idnum(); 2118 int cpref = method->name_index(); 2119 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 2120 } 2121 2122 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2123 if (MemberNameInStackFrame) { 2124 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2125 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2126 // we should expand MemberName::name when Throwable uses StackTrace 2127 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2128 return method; 2129 } else { 2130 short mid = stackFrame->short_field(_mid_offset); 2131 short version = stackFrame->short_field(_version_offset); 2132 return holder->method_with_orig_idnum(mid, version); 2133 } 2134 } 2135 2136 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) { 2137 if (MemberNameInStackFrame) { 2138 return holder->source_file_name(); 2139 } else { 2140 short version = stackFrame->short_field(_version_offset); 2141 return Backtrace::get_source_file_name(holder, version); 2142 } 2143 } 2144 2145 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2146 // set Method* or mid/cpref 2147 if (MemberNameInStackFrame) { 2148 oop mname = stackFrame->obj_field(_memberName_offset); 2149 InstanceKlass* ik = method->method_holder(); 2150 CallInfo info(method(), ik); 2151 MethodHandles::init_method_MemberName(mname, info); 2152 } else { 2153 int mid = method->orig_method_idnum(); 2154 int cpref = method->name_index(); 2155 assert((jushort)mid == mid, "mid should be short"); 2156 assert((jushort)cpref == cpref, "cpref should be short"); 2157 java_lang_StackFrameInfo::set_mid(stackFrame(), (short)mid); 2158 java_lang_StackFrameInfo::set_cpref(stackFrame(), (short)cpref); 2159 } 2160 // set bci 2161 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2162 // method may be redefined; store the version 2163 int version = method->constants()->version(); 2164 assert((jushort)version == version, "version should be short"); 2165 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2166 } 2167 2168 void java_lang_StackFrameInfo::fill_methodInfo(Handle stackFrame, TRAPS) { 2169 ResourceMark rm(THREAD); 2170 oop k = stackFrame->obj_field(_declaringClass_offset); 2171 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k)); 2172 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2173 int bci = stackFrame->int_field(_bci_offset); 2174 2175 // The method can be NULL if the requested class version is gone 2176 Symbol* sym = (method != NULL) ? method->name() : NULL; 2177 if (MemberNameInStackFrame) { 2178 assert(sym != NULL, "MemberName must have method name"); 2179 } else { 2180 // The method can be NULL if the requested class version is gone 2181 if (sym == NULL) { 2182 short cpref = stackFrame->short_field(_cpref_offset); 2183 sym = holder->constants()->symbol_at(cpref); 2184 } 2185 } 2186 2187 // set method name 2188 oop methodname = StringTable::intern(sym, CHECK); 2189 java_lang_StackFrameInfo::set_methodName(stackFrame(), methodname); 2190 2191 // set file name and line number 2192 Symbol* source = get_file_name(stackFrame, holder); 2193 if (source != NULL) { 2194 oop filename = StringTable::intern(source, CHECK); 2195 java_lang_StackFrameInfo::set_fileName(stackFrame(), filename); 2196 } 2197 2198 // if the method has been redefined, the bci is no longer applicable 2199 short version = stackFrame->short_field(_version_offset); 2200 if (version_matches(method, version)) { 2201 int line_number = Backtrace::get_line_number(method, bci); 2202 java_lang_StackFrameInfo::set_lineNumber(stackFrame(), line_number); 2203 } 2204 } 2205 2206 void java_lang_StackFrameInfo::compute_offsets() { 2207 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2208 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2209 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2210 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::int_signature()); 2211 compute_offset(_methodName_offset, k, vmSymbols::methodName_name(), vmSymbols::string_signature()); 2212 compute_offset(_fileName_offset, k, vmSymbols::fileName_name(), vmSymbols::string_signature()); 2213 compute_offset(_lineNumber_offset, k, vmSymbols::lineNumber_name(), vmSymbols::int_signature()); 2214 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2215 } 2216 2217 void java_lang_LiveStackFrameInfo::compute_offsets() { 2218 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2219 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2220 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2221 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2222 } 2223 2224 void java_lang_reflect_AccessibleObject::compute_offsets() { 2225 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2226 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2227 } 2228 2229 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2231 return (jboolean) reflect->bool_field(override_offset); 2232 } 2233 2234 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2235 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2236 reflect->bool_field_put(override_offset, (int) value); 2237 } 2238 2239 void java_lang_reflect_Method::compute_offsets() { 2240 Klass* k = SystemDictionary::reflect_Method_klass(); 2241 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2242 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2243 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2244 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2245 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2246 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2247 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2248 // The generic signature and annotations fields are only present in 1.5 2249 signature_offset = -1; 2250 annotations_offset = -1; 2251 parameter_annotations_offset = -1; 2252 annotation_default_offset = -1; 2253 type_annotations_offset = -1; 2254 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2255 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2256 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2257 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2258 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2259 } 2260 2261 Handle java_lang_reflect_Method::create(TRAPS) { 2262 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2263 Klass* klass = SystemDictionary::reflect_Method_klass(); 2264 // This class is eagerly initialized during VM initialization, since we keep a refence 2265 // to one of the methods 2266 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2267 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2268 } 2269 2270 oop java_lang_reflect_Method::clazz(oop reflect) { 2271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2272 return reflect->obj_field(clazz_offset); 2273 } 2274 2275 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2277 reflect->obj_field_put(clazz_offset, value); 2278 } 2279 2280 int java_lang_reflect_Method::slot(oop reflect) { 2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2282 return reflect->int_field(slot_offset); 2283 } 2284 2285 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2287 reflect->int_field_put(slot_offset, value); 2288 } 2289 2290 oop java_lang_reflect_Method::name(oop method) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 return method->obj_field(name_offset); 2293 } 2294 2295 void java_lang_reflect_Method::set_name(oop method, oop value) { 2296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2297 method->obj_field_put(name_offset, value); 2298 } 2299 2300 oop java_lang_reflect_Method::return_type(oop method) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 return method->obj_field(returnType_offset); 2303 } 2304 2305 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2307 method->obj_field_put(returnType_offset, value); 2308 } 2309 2310 oop java_lang_reflect_Method::parameter_types(oop method) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 return method->obj_field(parameterTypes_offset); 2313 } 2314 2315 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 method->obj_field_put(parameterTypes_offset, value); 2318 } 2319 2320 oop java_lang_reflect_Method::exception_types(oop method) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return method->obj_field(exceptionTypes_offset); 2323 } 2324 2325 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 method->obj_field_put(exceptionTypes_offset, value); 2328 } 2329 2330 int java_lang_reflect_Method::modifiers(oop method) { 2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2332 return method->int_field(modifiers_offset); 2333 } 2334 2335 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2337 method->int_field_put(modifiers_offset, value); 2338 } 2339 2340 bool java_lang_reflect_Method::has_signature_field() { 2341 return (signature_offset >= 0); 2342 } 2343 2344 oop java_lang_reflect_Method::signature(oop method) { 2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2346 assert(has_signature_field(), "signature field must be present"); 2347 return method->obj_field(signature_offset); 2348 } 2349 2350 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2352 assert(has_signature_field(), "signature field must be present"); 2353 method->obj_field_put(signature_offset, value); 2354 } 2355 2356 bool java_lang_reflect_Method::has_annotations_field() { 2357 return (annotations_offset >= 0); 2358 } 2359 2360 oop java_lang_reflect_Method::annotations(oop method) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 assert(has_annotations_field(), "annotations field must be present"); 2363 return method->obj_field(annotations_offset); 2364 } 2365 2366 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 assert(has_annotations_field(), "annotations field must be present"); 2369 method->obj_field_put(annotations_offset, value); 2370 } 2371 2372 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2373 return (parameter_annotations_offset >= 0); 2374 } 2375 2376 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2378 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2379 return method->obj_field(parameter_annotations_offset); 2380 } 2381 2382 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2383 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2384 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2385 method->obj_field_put(parameter_annotations_offset, value); 2386 } 2387 2388 bool java_lang_reflect_Method::has_annotation_default_field() { 2389 return (annotation_default_offset >= 0); 2390 } 2391 2392 oop java_lang_reflect_Method::annotation_default(oop method) { 2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2394 assert(has_annotation_default_field(), "annotation default field must be present"); 2395 return method->obj_field(annotation_default_offset); 2396 } 2397 2398 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2399 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2400 assert(has_annotation_default_field(), "annotation default field must be present"); 2401 method->obj_field_put(annotation_default_offset, value); 2402 } 2403 2404 bool java_lang_reflect_Method::has_type_annotations_field() { 2405 return (type_annotations_offset >= 0); 2406 } 2407 2408 oop java_lang_reflect_Method::type_annotations(oop method) { 2409 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2410 assert(has_type_annotations_field(), "type_annotations field must be present"); 2411 return method->obj_field(type_annotations_offset); 2412 } 2413 2414 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2416 assert(has_type_annotations_field(), "type_annotations field must be present"); 2417 method->obj_field_put(type_annotations_offset, value); 2418 } 2419 2420 void java_lang_reflect_Constructor::compute_offsets() { 2421 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2422 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2423 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2424 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2425 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2426 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2427 // The generic signature and annotations fields are only present in 1.5 2428 signature_offset = -1; 2429 annotations_offset = -1; 2430 parameter_annotations_offset = -1; 2431 type_annotations_offset = -1; 2432 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2433 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2434 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2435 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2436 } 2437 2438 Handle java_lang_reflect_Constructor::create(TRAPS) { 2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2440 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2441 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2442 instanceKlassHandle klass (THREAD, k); 2443 // Ensure it is initialized 2444 klass->initialize(CHECK_NH); 2445 return klass->allocate_instance_handle(THREAD); 2446 } 2447 2448 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2450 return reflect->obj_field(clazz_offset); 2451 } 2452 2453 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2455 reflect->obj_field_put(clazz_offset, value); 2456 } 2457 2458 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 return constructor->obj_field(parameterTypes_offset); 2461 } 2462 2463 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2465 constructor->obj_field_put(parameterTypes_offset, value); 2466 } 2467 2468 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2470 return constructor->obj_field(exceptionTypes_offset); 2471 } 2472 2473 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2475 constructor->obj_field_put(exceptionTypes_offset, value); 2476 } 2477 2478 int java_lang_reflect_Constructor::slot(oop reflect) { 2479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2480 return reflect->int_field(slot_offset); 2481 } 2482 2483 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2484 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2485 reflect->int_field_put(slot_offset, value); 2486 } 2487 2488 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2490 return constructor->int_field(modifiers_offset); 2491 } 2492 2493 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2495 constructor->int_field_put(modifiers_offset, value); 2496 } 2497 2498 bool java_lang_reflect_Constructor::has_signature_field() { 2499 return (signature_offset >= 0); 2500 } 2501 2502 oop java_lang_reflect_Constructor::signature(oop constructor) { 2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2504 assert(has_signature_field(), "signature field must be present"); 2505 return constructor->obj_field(signature_offset); 2506 } 2507 2508 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2510 assert(has_signature_field(), "signature field must be present"); 2511 constructor->obj_field_put(signature_offset, value); 2512 } 2513 2514 bool java_lang_reflect_Constructor::has_annotations_field() { 2515 return (annotations_offset >= 0); 2516 } 2517 2518 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2520 assert(has_annotations_field(), "annotations field must be present"); 2521 return constructor->obj_field(annotations_offset); 2522 } 2523 2524 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2525 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2526 assert(has_annotations_field(), "annotations field must be present"); 2527 constructor->obj_field_put(annotations_offset, value); 2528 } 2529 2530 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2531 return (parameter_annotations_offset >= 0); 2532 } 2533 2534 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2536 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2537 return method->obj_field(parameter_annotations_offset); 2538 } 2539 2540 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2541 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2542 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2543 method->obj_field_put(parameter_annotations_offset, value); 2544 } 2545 2546 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2547 return (type_annotations_offset >= 0); 2548 } 2549 2550 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2551 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2552 assert(has_type_annotations_field(), "type_annotations field must be present"); 2553 return constructor->obj_field(type_annotations_offset); 2554 } 2555 2556 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2558 assert(has_type_annotations_field(), "type_annotations field must be present"); 2559 constructor->obj_field_put(type_annotations_offset, value); 2560 } 2561 2562 void java_lang_reflect_Field::compute_offsets() { 2563 Klass* k = SystemDictionary::reflect_Field_klass(); 2564 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2565 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2566 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2567 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2568 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2569 // The generic signature and annotations fields are only present in 1.5 2570 signature_offset = -1; 2571 annotations_offset = -1; 2572 type_annotations_offset = -1; 2573 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2574 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2575 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2576 } 2577 2578 Handle java_lang_reflect_Field::create(TRAPS) { 2579 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2580 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2581 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2582 instanceKlassHandle klass (THREAD, k); 2583 // Ensure it is initialized 2584 klass->initialize(CHECK_NH); 2585 return klass->allocate_instance_handle(THREAD); 2586 } 2587 2588 oop java_lang_reflect_Field::clazz(oop reflect) { 2589 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2590 return reflect->obj_field(clazz_offset); 2591 } 2592 2593 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2594 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2595 reflect->obj_field_put(clazz_offset, value); 2596 } 2597 2598 oop java_lang_reflect_Field::name(oop field) { 2599 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2600 return field->obj_field(name_offset); 2601 } 2602 2603 void java_lang_reflect_Field::set_name(oop field, oop value) { 2604 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2605 field->obj_field_put(name_offset, value); 2606 } 2607 2608 oop java_lang_reflect_Field::type(oop field) { 2609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2610 return field->obj_field(type_offset); 2611 } 2612 2613 void java_lang_reflect_Field::set_type(oop field, oop value) { 2614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2615 field->obj_field_put(type_offset, value); 2616 } 2617 2618 int java_lang_reflect_Field::slot(oop reflect) { 2619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2620 return reflect->int_field(slot_offset); 2621 } 2622 2623 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2624 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2625 reflect->int_field_put(slot_offset, value); 2626 } 2627 2628 int java_lang_reflect_Field::modifiers(oop field) { 2629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2630 return field->int_field(modifiers_offset); 2631 } 2632 2633 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2635 field->int_field_put(modifiers_offset, value); 2636 } 2637 2638 bool java_lang_reflect_Field::has_signature_field() { 2639 return (signature_offset >= 0); 2640 } 2641 2642 oop java_lang_reflect_Field::signature(oop field) { 2643 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2644 assert(has_signature_field(), "signature field must be present"); 2645 return field->obj_field(signature_offset); 2646 } 2647 2648 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2650 assert(has_signature_field(), "signature field must be present"); 2651 field->obj_field_put(signature_offset, value); 2652 } 2653 2654 bool java_lang_reflect_Field::has_annotations_field() { 2655 return (annotations_offset >= 0); 2656 } 2657 2658 oop java_lang_reflect_Field::annotations(oop field) { 2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2660 assert(has_annotations_field(), "annotations field must be present"); 2661 return field->obj_field(annotations_offset); 2662 } 2663 2664 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2665 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2666 assert(has_annotations_field(), "annotations field must be present"); 2667 field->obj_field_put(annotations_offset, value); 2668 } 2669 2670 bool java_lang_reflect_Field::has_type_annotations_field() { 2671 return (type_annotations_offset >= 0); 2672 } 2673 2674 oop java_lang_reflect_Field::type_annotations(oop field) { 2675 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2676 assert(has_type_annotations_field(), "type_annotations field must be present"); 2677 return field->obj_field(type_annotations_offset); 2678 } 2679 2680 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2682 assert(has_type_annotations_field(), "type_annotations field must be present"); 2683 field->obj_field_put(type_annotations_offset, value); 2684 } 2685 2686 void sun_reflect_ConstantPool::compute_offsets() { 2687 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2688 // This null test can be removed post beta 2689 if (k != NULL) { 2690 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2691 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2692 } 2693 } 2694 2695 void java_lang_reflect_Parameter::compute_offsets() { 2696 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2697 if(NULL != k) { 2698 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2699 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2700 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2701 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2702 } 2703 } 2704 2705 Handle java_lang_reflect_Parameter::create(TRAPS) { 2706 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2707 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2708 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2709 instanceKlassHandle klass (THREAD, k); 2710 // Ensure it is initialized 2711 klass->initialize(CHECK_NH); 2712 return klass->allocate_instance_handle(THREAD); 2713 } 2714 2715 oop java_lang_reflect_Parameter::name(oop param) { 2716 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2717 return param->obj_field(name_offset); 2718 } 2719 2720 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2722 param->obj_field_put(name_offset, value); 2723 } 2724 2725 int java_lang_reflect_Parameter::modifiers(oop param) { 2726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2727 return param->int_field(modifiers_offset); 2728 } 2729 2730 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2732 param->int_field_put(modifiers_offset, value); 2733 } 2734 2735 int java_lang_reflect_Parameter::index(oop param) { 2736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2737 return param->int_field(index_offset); 2738 } 2739 2740 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2742 param->int_field_put(index_offset, value); 2743 } 2744 2745 oop java_lang_reflect_Parameter::executable(oop param) { 2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2747 return param->obj_field(executable_offset); 2748 } 2749 2750 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2752 param->obj_field_put(executable_offset, value); 2753 } 2754 2755 2756 Handle sun_reflect_ConstantPool::create(TRAPS) { 2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2758 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2759 instanceKlassHandle klass (THREAD, k); 2760 // Ensure it is initialized 2761 klass->initialize(CHECK_NH); 2762 return klass->allocate_instance_handle(THREAD); 2763 } 2764 2765 2766 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2768 oop mirror = value->pool_holder()->java_mirror(); 2769 // Save the mirror to get back the constant pool. 2770 reflect->obj_field_put(_oop_offset, mirror); 2771 } 2772 2773 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2775 2776 oop mirror = reflect->obj_field(_oop_offset); 2777 Klass* k = java_lang_Class::as_Klass(mirror); 2778 assert(k->is_instance_klass(), "Must be"); 2779 2780 // Get the constant pool back from the klass. Since class redefinition 2781 // merges the new constant pool into the old, this is essentially the 2782 // same constant pool as the original. If constant pool merging is 2783 // no longer done in the future, this will have to change to save 2784 // the original. 2785 return InstanceKlass::cast(k)->constants(); 2786 } 2787 2788 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2789 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2790 // This null test can be removed post beta 2791 if (k != NULL) { 2792 compute_offset(_base_offset, k, 2793 vmSymbols::base_name(), vmSymbols::object_signature()); 2794 } 2795 } 2796 2797 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2798 Klass* k = SystemDictionary::box_klass(type); 2799 if (k == NULL) return NULL; 2800 instanceKlassHandle h (THREAD, k); 2801 if (!h->is_initialized()) h->initialize(CHECK_0); 2802 return h->allocate_instance(THREAD); 2803 } 2804 2805 2806 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2807 oop box = initialize_and_allocate(type, CHECK_0); 2808 if (box == NULL) return NULL; 2809 switch (type) { 2810 case T_BOOLEAN: 2811 box->bool_field_put(value_offset, value->z); 2812 break; 2813 case T_CHAR: 2814 box->char_field_put(value_offset, value->c); 2815 break; 2816 case T_FLOAT: 2817 box->float_field_put(value_offset, value->f); 2818 break; 2819 case T_DOUBLE: 2820 box->double_field_put(long_value_offset, value->d); 2821 break; 2822 case T_BYTE: 2823 box->byte_field_put(value_offset, value->b); 2824 break; 2825 case T_SHORT: 2826 box->short_field_put(value_offset, value->s); 2827 break; 2828 case T_INT: 2829 box->int_field_put(value_offset, value->i); 2830 break; 2831 case T_LONG: 2832 box->long_field_put(long_value_offset, value->j); 2833 break; 2834 default: 2835 return NULL; 2836 } 2837 return box; 2838 } 2839 2840 2841 BasicType java_lang_boxing_object::basic_type(oop box) { 2842 if (box == NULL) return T_ILLEGAL; 2843 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2844 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2845 return T_ILLEGAL; 2846 return type; 2847 } 2848 2849 2850 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2851 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2852 switch (type) { 2853 case T_BOOLEAN: 2854 value->z = box->bool_field(value_offset); 2855 break; 2856 case T_CHAR: 2857 value->c = box->char_field(value_offset); 2858 break; 2859 case T_FLOAT: 2860 value->f = box->float_field(value_offset); 2861 break; 2862 case T_DOUBLE: 2863 value->d = box->double_field(long_value_offset); 2864 break; 2865 case T_BYTE: 2866 value->b = box->byte_field(value_offset); 2867 break; 2868 case T_SHORT: 2869 value->s = box->short_field(value_offset); 2870 break; 2871 case T_INT: 2872 value->i = box->int_field(value_offset); 2873 break; 2874 case T_LONG: 2875 value->j = box->long_field(long_value_offset); 2876 break; 2877 default: 2878 return T_ILLEGAL; 2879 } // end switch 2880 return type; 2881 } 2882 2883 2884 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2885 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2886 switch (type) { 2887 case T_BOOLEAN: 2888 box->bool_field_put(value_offset, value->z); 2889 break; 2890 case T_CHAR: 2891 box->char_field_put(value_offset, value->c); 2892 break; 2893 case T_FLOAT: 2894 box->float_field_put(value_offset, value->f); 2895 break; 2896 case T_DOUBLE: 2897 box->double_field_put(long_value_offset, value->d); 2898 break; 2899 case T_BYTE: 2900 box->byte_field_put(value_offset, value->b); 2901 break; 2902 case T_SHORT: 2903 box->short_field_put(value_offset, value->s); 2904 break; 2905 case T_INT: 2906 box->int_field_put(value_offset, value->i); 2907 break; 2908 case T_LONG: 2909 box->long_field_put(long_value_offset, value->j); 2910 break; 2911 default: 2912 return T_ILLEGAL; 2913 } // end switch 2914 return type; 2915 } 2916 2917 2918 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2919 switch (type) { 2920 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2921 case T_CHAR: st->print("%d", value->c); break; 2922 case T_BYTE: st->print("%d", value->b); break; 2923 case T_SHORT: st->print("%d", value->s); break; 2924 case T_INT: st->print("%d", value->i); break; 2925 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2926 case T_FLOAT: st->print("%f", value->f); break; 2927 case T_DOUBLE: st->print("%lf", value->d); break; 2928 default: st->print("type %d?", type); break; 2929 } 2930 } 2931 2932 2933 // Support for java_lang_ref_Reference 2934 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2935 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2936 address addr = ik->static_field_addr(static_lock_offset); 2937 return (HeapWord*) addr; 2938 } 2939 2940 oop java_lang_ref_Reference::pending_list_lock() { 2941 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2942 address addr = ik->static_field_addr(static_lock_offset); 2943 if (UseCompressedOops) { 2944 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2945 } else { 2946 return oopDesc::load_decode_heap_oop((oop*)addr); 2947 } 2948 } 2949 2950 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2951 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2952 address addr = ik->static_field_addr(static_pending_offset); 2953 // XXX This might not be HeapWord aligned, almost rather be char *. 2954 return (HeapWord*)addr; 2955 } 2956 2957 oop java_lang_ref_Reference::pending_list() { 2958 char *addr = (char *)pending_list_addr(); 2959 if (UseCompressedOops) { 2960 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2961 } else { 2962 return oopDesc::load_decode_heap_oop((oop*)addr); 2963 } 2964 } 2965 2966 2967 // Support for java_lang_ref_SoftReference 2968 2969 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2970 return ref->long_field(timestamp_offset); 2971 } 2972 2973 jlong java_lang_ref_SoftReference::clock() { 2974 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2975 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2976 return *offset; 2977 } 2978 2979 void java_lang_ref_SoftReference::set_clock(jlong value) { 2980 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2981 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2982 *offset = value; 2983 } 2984 2985 // Support for java_lang_invoke_DirectMethodHandle 2986 2987 int java_lang_invoke_DirectMethodHandle::_member_offset; 2988 2989 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2990 oop member_name = NULL; 2991 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2992 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2993 if (is_dmh) { 2994 member_name = dmh->obj_field(member_offset_in_bytes()); 2995 } 2996 return member_name; 2997 } 2998 2999 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3000 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3001 if (klass_oop != NULL) { 3002 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3003 } 3004 } 3005 3006 // Support for java_lang_invoke_MethodHandle 3007 3008 int java_lang_invoke_MethodHandle::_type_offset; 3009 int java_lang_invoke_MethodHandle::_form_offset; 3010 3011 int java_lang_invoke_MemberName::_clazz_offset; 3012 int java_lang_invoke_MemberName::_name_offset; 3013 int java_lang_invoke_MemberName::_type_offset; 3014 int java_lang_invoke_MemberName::_flags_offset; 3015 int java_lang_invoke_MemberName::_vmtarget_offset; 3016 int java_lang_invoke_MemberName::_vmloader_offset; 3017 int java_lang_invoke_MemberName::_vmindex_offset; 3018 3019 int java_lang_invoke_LambdaForm::_vmentry_offset; 3020 3021 void java_lang_invoke_MethodHandle::compute_offsets() { 3022 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3023 if (klass_oop != NULL) { 3024 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3025 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3026 } 3027 } 3028 3029 void java_lang_invoke_MemberName::compute_offsets() { 3030 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3031 if (klass_oop != NULL) { 3032 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3033 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3034 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3035 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3036 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3037 } 3038 } 3039 3040 void java_lang_invoke_LambdaForm::compute_offsets() { 3041 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3042 if (klass_oop != NULL) { 3043 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3044 } 3045 } 3046 3047 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3048 return obj != NULL && is_subclass(obj->klass()); 3049 } 3050 3051 3052 oop java_lang_invoke_MethodHandle::type(oop mh) { 3053 return mh->obj_field(_type_offset); 3054 } 3055 3056 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3057 mh->obj_field_put(_type_offset, mtype); 3058 } 3059 3060 oop java_lang_invoke_MethodHandle::form(oop mh) { 3061 assert(_form_offset != 0, ""); 3062 return mh->obj_field(_form_offset); 3063 } 3064 3065 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3066 assert(_form_offset != 0, ""); 3067 mh->obj_field_put(_form_offset, lform); 3068 } 3069 3070 /// MemberName accessors 3071 3072 oop java_lang_invoke_MemberName::clazz(oop mname) { 3073 assert(is_instance(mname), "wrong type"); 3074 return mname->obj_field(_clazz_offset); 3075 } 3076 3077 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3078 assert(is_instance(mname), "wrong type"); 3079 mname->obj_field_put(_clazz_offset, clazz); 3080 } 3081 3082 oop java_lang_invoke_MemberName::name(oop mname) { 3083 assert(is_instance(mname), "wrong type"); 3084 return mname->obj_field(_name_offset); 3085 } 3086 3087 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3088 assert(is_instance(mname), "wrong type"); 3089 mname->obj_field_put(_name_offset, name); 3090 } 3091 3092 oop java_lang_invoke_MemberName::type(oop mname) { 3093 assert(is_instance(mname), "wrong type"); 3094 return mname->obj_field(_type_offset); 3095 } 3096 3097 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3098 assert(is_instance(mname), "wrong type"); 3099 mname->obj_field_put(_type_offset, type); 3100 } 3101 3102 int java_lang_invoke_MemberName::flags(oop mname) { 3103 assert(is_instance(mname), "wrong type"); 3104 return mname->int_field(_flags_offset); 3105 } 3106 3107 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3108 assert(is_instance(mname), "wrong type"); 3109 mname->int_field_put(_flags_offset, flags); 3110 } 3111 3112 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3113 assert(is_instance(mname), "wrong type"); 3114 return (Metadata*)mname->address_field(_vmtarget_offset); 3115 } 3116 3117 bool java_lang_invoke_MemberName::is_method(oop mname) { 3118 assert(is_instance(mname), "must be MemberName"); 3119 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3120 } 3121 3122 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3123 assert(is_instance(mname), "wrong type"); 3124 // check the type of the vmtarget 3125 oop dependency = NULL; 3126 if (ref != NULL) { 3127 switch (flags(mname) & (MN_IS_METHOD | 3128 MN_IS_CONSTRUCTOR | 3129 MN_IS_FIELD)) { 3130 case MN_IS_METHOD: 3131 case MN_IS_CONSTRUCTOR: 3132 assert(ref->is_method(), "should be a method"); 3133 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3134 break; 3135 case MN_IS_FIELD: 3136 assert(ref->is_klass(), "should be a class"); 3137 dependency = ((Klass*)ref)->java_mirror(); 3138 break; 3139 default: 3140 ShouldNotReachHere(); 3141 } 3142 } 3143 mname->address_field_put(_vmtarget_offset, (address)ref); 3144 // Add a reference to the loader (actually mirror because anonymous classes will not have 3145 // distinct loaders) to ensure the metadata is kept alive 3146 // This mirror may be different than the one in clazz field. 3147 mname->obj_field_put(_vmloader_offset, dependency); 3148 } 3149 3150 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3151 assert(is_instance(mname), "wrong type"); 3152 return (intptr_t) mname->address_field(_vmindex_offset); 3153 } 3154 3155 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3156 assert(is_instance(mname), "wrong type"); 3157 mname->address_field_put(_vmindex_offset, (address) index); 3158 } 3159 3160 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3161 assert(is_instance(lform), "wrong type"); 3162 return lform->obj_field(_vmentry_offset); 3163 } 3164 3165 3166 // Support for java_lang_invoke_MethodType 3167 3168 int java_lang_invoke_MethodType::_rtype_offset; 3169 int java_lang_invoke_MethodType::_ptypes_offset; 3170 3171 void java_lang_invoke_MethodType::compute_offsets() { 3172 Klass* k = SystemDictionary::MethodType_klass(); 3173 if (k != NULL) { 3174 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3175 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3176 } 3177 } 3178 3179 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3180 st->print("("); 3181 objArrayOop pts = ptypes(mt); 3182 for (int i = 0, limit = pts->length(); i < limit; i++) { 3183 java_lang_Class::print_signature(pts->obj_at(i), st); 3184 } 3185 st->print(")"); 3186 java_lang_Class::print_signature(rtype(mt), st); 3187 } 3188 3189 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3190 ResourceMark rm; 3191 stringStream buffer(128); 3192 print_signature(mt, &buffer); 3193 const char* sigstr = buffer.base(); 3194 int siglen = (int) buffer.size(); 3195 Symbol *name; 3196 if (!intern_if_not_found) { 3197 name = SymbolTable::probe(sigstr, siglen); 3198 } else { 3199 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3200 } 3201 return name; 3202 } 3203 3204 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3205 if (mt1 == mt2) 3206 return true; 3207 if (rtype(mt1) != rtype(mt2)) 3208 return false; 3209 if (ptype_count(mt1) != ptype_count(mt2)) 3210 return false; 3211 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3212 if (ptype(mt1, i) != ptype(mt2, i)) 3213 return false; 3214 } 3215 return true; 3216 } 3217 3218 oop java_lang_invoke_MethodType::rtype(oop mt) { 3219 assert(is_instance(mt), "must be a MethodType"); 3220 return mt->obj_field(_rtype_offset); 3221 } 3222 3223 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3224 assert(is_instance(mt), "must be a MethodType"); 3225 return (objArrayOop) mt->obj_field(_ptypes_offset); 3226 } 3227 3228 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3229 return ptypes(mt)->obj_at(idx); 3230 } 3231 3232 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3233 return ptypes(mt)->length(); 3234 } 3235 3236 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3237 objArrayOop pts = ptypes(mt); 3238 int count = pts->length(); 3239 int slots = 0; 3240 for (int i = 0; i < count; i++) { 3241 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3242 slots += type2size[bt]; 3243 } 3244 return slots; 3245 } 3246 3247 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3248 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3249 return type2size[bt]; 3250 } 3251 3252 3253 // Support for java_lang_invoke_CallSite 3254 3255 int java_lang_invoke_CallSite::_target_offset; 3256 int java_lang_invoke_CallSite::_context_offset; 3257 3258 void java_lang_invoke_CallSite::compute_offsets() { 3259 Klass* k = SystemDictionary::CallSite_klass(); 3260 if (k != NULL) { 3261 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3262 compute_offset(_context_offset, k, vmSymbols::context_name(), 3263 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3264 } 3265 } 3266 3267 oop java_lang_invoke_CallSite::context(oop call_site) { 3268 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3269 3270 oop dep_oop = call_site->obj_field(_context_offset); 3271 return dep_oop; 3272 } 3273 3274 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3275 3276 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3277 3278 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3279 Klass* k = SystemDictionary::Context_klass(); 3280 if (k != NULL) { 3281 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3282 } 3283 } 3284 3285 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3286 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3287 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3288 DependencyContext dep_ctx(vmdeps_addr); 3289 return dep_ctx; 3290 } 3291 3292 // Support for java_security_AccessControlContext 3293 3294 int java_security_AccessControlContext::_context_offset = 0; 3295 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3296 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3297 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3298 3299 void java_security_AccessControlContext::compute_offsets() { 3300 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3301 fieldDescriptor fd; 3302 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3303 3304 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3305 fatal("Invalid layout of java.security.AccessControlContext"); 3306 } 3307 _context_offset = fd.offset(); 3308 3309 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3310 fatal("Invalid layout of java.security.AccessControlContext"); 3311 } 3312 _privilegedContext_offset = fd.offset(); 3313 3314 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3315 fatal("Invalid layout of java.security.AccessControlContext"); 3316 } 3317 _isPrivileged_offset = fd.offset(); 3318 3319 // The offset may not be present for bootstrapping with older JDK. 3320 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3321 _isAuthorized_offset = fd.offset(); 3322 } 3323 } 3324 3325 3326 bool java_security_AccessControlContext::is_authorized(Handle context) { 3327 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3328 assert(_isAuthorized_offset != -1, "should be set"); 3329 return context->bool_field(_isAuthorized_offset) != 0; 3330 } 3331 3332 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3333 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3334 // Ensure klass is initialized 3335 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3336 // Allocate result 3337 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3338 // Fill in values 3339 result->obj_field_put(_context_offset, context()); 3340 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3341 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3342 // whitelist AccessControlContexts created by the JVM if present 3343 if (_isAuthorized_offset != -1) { 3344 result->bool_field_put(_isAuthorized_offset, true); 3345 } 3346 return result; 3347 } 3348 3349 3350 // Support for java_lang_ClassLoader 3351 3352 bool java_lang_ClassLoader::offsets_computed = false; 3353 int java_lang_ClassLoader::_loader_data_offset = -1; 3354 int java_lang_ClassLoader::parallelCapable_offset = -1; 3355 3356 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3357 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3358 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3359 } 3360 3361 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3362 return *java_lang_ClassLoader::loader_data_addr(loader); 3363 } 3364 3365 void java_lang_ClassLoader::compute_offsets() { 3366 assert(!offsets_computed, "offsets should be initialized only once"); 3367 offsets_computed = true; 3368 3369 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3370 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3371 compute_optional_offset(parallelCapable_offset, 3372 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3373 3374 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3375 } 3376 3377 oop java_lang_ClassLoader::parent(oop loader) { 3378 assert(is_instance(loader), "loader must be oop"); 3379 return loader->obj_field(parent_offset); 3380 } 3381 3382 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3383 assert(is_instance(loader), "loader must be oop"); 3384 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3385 oop acl = loader; 3386 debug_only(jint loop_count = 0); 3387 // This loop taken verbatim from ClassLoader.java: 3388 do { 3389 acl = parent(acl); 3390 if (cl == acl) { 3391 return true; 3392 } 3393 assert(++loop_count > 0, "loop_count overflow"); 3394 } while (acl != NULL); 3395 return false; 3396 } 3397 3398 bool java_lang_ClassLoader::is_instance(oop obj) { 3399 return obj != NULL && is_subclass(obj->klass()); 3400 } 3401 3402 3403 // For class loader classes, parallelCapable defined 3404 // based on non-null field 3405 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3406 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3407 if (parallelCapable_offset == -1) { 3408 // Default for backward compatibility is false 3409 return false; 3410 } 3411 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3412 } 3413 3414 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3415 // Fix for 4474172; see evaluation for more details 3416 loader = non_reflection_class_loader(loader); 3417 3418 oop cl = SystemDictionary::java_system_loader(); 3419 while(cl != NULL) { 3420 if (cl == loader) return true; 3421 cl = parent(cl); 3422 } 3423 return false; 3424 } 3425 3426 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3427 if (loader != NULL) { 3428 // See whether this is one of the class loaders associated with 3429 // the generated bytecodes for reflection, and if so, "magically" 3430 // delegate to its parent to prevent class loading from occurring 3431 // in places where applications using reflection didn't expect it. 3432 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3433 // This might be null in non-1.4 JDKs 3434 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3435 return parent(loader); 3436 } 3437 } 3438 return loader; 3439 } 3440 3441 3442 // Support for java_lang_System 3443 int java_lang_System::in_offset_in_bytes() { 3444 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3445 } 3446 3447 3448 int java_lang_System::out_offset_in_bytes() { 3449 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3450 } 3451 3452 3453 int java_lang_System::err_offset_in_bytes() { 3454 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3455 } 3456 3457 3458 bool java_lang_System::has_security_manager() { 3459 InstanceKlass* ik = SystemDictionary::System_klass(); 3460 address addr = ik->static_field_addr(static_security_offset); 3461 if (UseCompressedOops) { 3462 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3463 } else { 3464 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3465 } 3466 } 3467 3468 int java_lang_Class::_klass_offset; 3469 int java_lang_Class::_array_klass_offset; 3470 int java_lang_Class::_oop_size_offset; 3471 int java_lang_Class::_static_oop_field_count_offset; 3472 int java_lang_Class::_class_loader_offset; 3473 int java_lang_Class::_protection_domain_offset; 3474 int java_lang_Class::_component_mirror_offset; 3475 int java_lang_Class::_init_lock_offset; 3476 int java_lang_Class::_signers_offset; 3477 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3478 int java_lang_Throwable::backtrace_offset; 3479 int java_lang_Throwable::detailMessage_offset; 3480 int java_lang_Throwable::cause_offset; 3481 int java_lang_Throwable::stackTrace_offset; 3482 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3483 int java_lang_reflect_AccessibleObject::override_offset; 3484 int java_lang_reflect_Method::clazz_offset; 3485 int java_lang_reflect_Method::name_offset; 3486 int java_lang_reflect_Method::returnType_offset; 3487 int java_lang_reflect_Method::parameterTypes_offset; 3488 int java_lang_reflect_Method::exceptionTypes_offset; 3489 int java_lang_reflect_Method::slot_offset; 3490 int java_lang_reflect_Method::modifiers_offset; 3491 int java_lang_reflect_Method::signature_offset; 3492 int java_lang_reflect_Method::annotations_offset; 3493 int java_lang_reflect_Method::parameter_annotations_offset; 3494 int java_lang_reflect_Method::annotation_default_offset; 3495 int java_lang_reflect_Method::type_annotations_offset; 3496 int java_lang_reflect_Constructor::clazz_offset; 3497 int java_lang_reflect_Constructor::parameterTypes_offset; 3498 int java_lang_reflect_Constructor::exceptionTypes_offset; 3499 int java_lang_reflect_Constructor::slot_offset; 3500 int java_lang_reflect_Constructor::modifiers_offset; 3501 int java_lang_reflect_Constructor::signature_offset; 3502 int java_lang_reflect_Constructor::annotations_offset; 3503 int java_lang_reflect_Constructor::parameter_annotations_offset; 3504 int java_lang_reflect_Constructor::type_annotations_offset; 3505 int java_lang_reflect_Field::clazz_offset; 3506 int java_lang_reflect_Field::name_offset; 3507 int java_lang_reflect_Field::type_offset; 3508 int java_lang_reflect_Field::slot_offset; 3509 int java_lang_reflect_Field::modifiers_offset; 3510 int java_lang_reflect_Field::signature_offset; 3511 int java_lang_reflect_Field::annotations_offset; 3512 int java_lang_reflect_Field::type_annotations_offset; 3513 int java_lang_reflect_Parameter::name_offset; 3514 int java_lang_reflect_Parameter::modifiers_offset; 3515 int java_lang_reflect_Parameter::index_offset; 3516 int java_lang_reflect_Parameter::executable_offset; 3517 int java_lang_boxing_object::value_offset; 3518 int java_lang_boxing_object::long_value_offset; 3519 int java_lang_ref_Reference::referent_offset; 3520 int java_lang_ref_Reference::queue_offset; 3521 int java_lang_ref_Reference::next_offset; 3522 int java_lang_ref_Reference::discovered_offset; 3523 int java_lang_ref_Reference::static_lock_offset; 3524 int java_lang_ref_Reference::static_pending_offset; 3525 int java_lang_ref_Reference::number_of_fake_oop_fields; 3526 int java_lang_ref_SoftReference::timestamp_offset; 3527 int java_lang_ref_SoftReference::static_clock_offset; 3528 int java_lang_ClassLoader::parent_offset; 3529 int java_lang_System::static_in_offset; 3530 int java_lang_System::static_out_offset; 3531 int java_lang_System::static_err_offset; 3532 int java_lang_System::static_security_offset; 3533 int java_lang_StackTraceElement::declaringClass_offset; 3534 int java_lang_StackTraceElement::methodName_offset; 3535 int java_lang_StackTraceElement::fileName_offset; 3536 int java_lang_StackTraceElement::lineNumber_offset; 3537 int java_lang_StackFrameInfo::_declaringClass_offset; 3538 int java_lang_StackFrameInfo::_memberName_offset; 3539 int java_lang_StackFrameInfo::_bci_offset; 3540 int java_lang_StackFrameInfo::_methodName_offset; 3541 int java_lang_StackFrameInfo::_fileName_offset; 3542 int java_lang_StackFrameInfo::_lineNumber_offset; 3543 int java_lang_StackFrameInfo::_mid_offset; 3544 int java_lang_StackFrameInfo::_version_offset; 3545 int java_lang_StackFrameInfo::_cpref_offset; 3546 int java_lang_LiveStackFrameInfo::_monitors_offset; 3547 int java_lang_LiveStackFrameInfo::_locals_offset; 3548 int java_lang_LiveStackFrameInfo::_operands_offset; 3549 int java_lang_AssertionStatusDirectives::classes_offset; 3550 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3551 int java_lang_AssertionStatusDirectives::packages_offset; 3552 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3553 int java_lang_AssertionStatusDirectives::deflt_offset; 3554 int java_nio_Buffer::_limit_offset; 3555 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3556 int sun_reflect_ConstantPool::_oop_offset; 3557 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3558 3559 3560 // Support for java_lang_StackTraceElement 3561 3562 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3563 element->obj_field_put(fileName_offset, value); 3564 } 3565 3566 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3567 element->obj_field_put(declaringClass_offset, value); 3568 } 3569 3570 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3571 element->obj_field_put(methodName_offset, value); 3572 } 3573 3574 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3575 element->int_field_put(lineNumber_offset, value); 3576 } 3577 3578 // Support for java_lang_StackFrameInfo 3579 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3580 element->obj_field_put(_declaringClass_offset, value); 3581 } 3582 3583 void java_lang_StackFrameInfo::set_mid(oop element, short value) { 3584 element->short_field_put(_mid_offset, value); 3585 } 3586 3587 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3588 element->short_field_put(_version_offset, value); 3589 } 3590 3591 void java_lang_StackFrameInfo::set_cpref(oop element, short value) { 3592 element->short_field_put(_cpref_offset, value); 3593 } 3594 3595 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3596 element->int_field_put(_bci_offset, value); 3597 } 3598 3599 void java_lang_StackFrameInfo::set_fileName(oop element, oop value) { 3600 element->obj_field_put(_fileName_offset, value); 3601 } 3602 3603 void java_lang_StackFrameInfo::set_methodName(oop element, oop value) { 3604 element->obj_field_put(_methodName_offset, value); 3605 } 3606 3607 void java_lang_StackFrameInfo::set_lineNumber(oop element, int value) { 3608 element->int_field_put(_lineNumber_offset, value); 3609 } 3610 3611 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3612 element->obj_field_put(_monitors_offset, value); 3613 } 3614 3615 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3616 element->obj_field_put(_locals_offset, value); 3617 } 3618 3619 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3620 element->obj_field_put(_operands_offset, value); 3621 } 3622 3623 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3624 3625 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3626 o->obj_field_put(classes_offset, val); 3627 } 3628 3629 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3630 o->obj_field_put(classEnabled_offset, val); 3631 } 3632 3633 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3634 o->obj_field_put(packages_offset, val); 3635 } 3636 3637 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3638 o->obj_field_put(packageEnabled_offset, val); 3639 } 3640 3641 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3642 o->bool_field_put(deflt_offset, val); 3643 } 3644 3645 3646 // Support for intrinsification of java.nio.Buffer.checkIndex 3647 int java_nio_Buffer::limit_offset() { 3648 return _limit_offset; 3649 } 3650 3651 3652 void java_nio_Buffer::compute_offsets() { 3653 Klass* k = SystemDictionary::nio_Buffer_klass(); 3654 assert(k != NULL, "must be loaded in 1.4+"); 3655 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3656 } 3657 3658 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3659 if (_owner_offset != 0) return; 3660 3661 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3662 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3663 compute_offset(_owner_offset, k, 3664 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3665 } 3666 3667 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3668 assert(_owner_offset != 0, "Must be initialized"); 3669 return obj->obj_field(_owner_offset); 3670 } 3671 3672 // Compute hard-coded offsets 3673 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3674 // are not available to determine the offset_of_static_fields. 3675 void JavaClasses::compute_hard_coded_offsets() { 3676 const int x = heapOopSize; 3677 const int header = instanceOopDesc::base_offset_in_bytes(); 3678 3679 // Throwable Class 3680 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3681 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3682 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3683 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3684 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3685 3686 // java_lang_boxing_object 3687 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3688 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3689 3690 // java_lang_ref_Reference: 3691 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3692 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3693 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3694 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3695 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3696 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3697 // Artificial fields for java_lang_ref_Reference 3698 // The first field is for the discovered field added in 1.4 3699 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3700 3701 // java_lang_ref_SoftReference Class 3702 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3703 // Don't multiply static fields because they are always in wordSize units 3704 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3705 3706 // java_lang_ClassLoader 3707 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3708 3709 // java_lang_System 3710 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3711 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3712 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3713 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3714 3715 // java_lang_StackTraceElement 3716 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3717 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3718 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3719 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3720 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3721 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3722 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3723 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3724 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3725 3726 } 3727 3728 3729 // Compute non-hard-coded field offsets of all the classes in this file 3730 void JavaClasses::compute_offsets() { 3731 // java_lang_Class::compute_offsets was called earlier in bootstrap 3732 java_lang_ClassLoader::compute_offsets(); 3733 java_lang_Thread::compute_offsets(); 3734 java_lang_ThreadGroup::compute_offsets(); 3735 java_lang_invoke_MethodHandle::compute_offsets(); 3736 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3737 java_lang_invoke_MemberName::compute_offsets(); 3738 java_lang_invoke_LambdaForm::compute_offsets(); 3739 java_lang_invoke_MethodType::compute_offsets(); 3740 java_lang_invoke_CallSite::compute_offsets(); 3741 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3742 java_security_AccessControlContext::compute_offsets(); 3743 // Initialize reflection classes. The layouts of these classes 3744 // changed with the new reflection implementation in JDK 1.4, and 3745 // since the Universe doesn't know what JDK version it is until this 3746 // point we defer computation of these offsets until now. 3747 java_lang_reflect_AccessibleObject::compute_offsets(); 3748 java_lang_reflect_Method::compute_offsets(); 3749 java_lang_reflect_Constructor::compute_offsets(); 3750 java_lang_reflect_Field::compute_offsets(); 3751 java_nio_Buffer::compute_offsets(); 3752 sun_reflect_ConstantPool::compute_offsets(); 3753 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3754 java_lang_reflect_Parameter::compute_offsets(); 3755 java_lang_StackFrameInfo::compute_offsets(); 3756 java_lang_LiveStackFrameInfo::compute_offsets(); 3757 3758 // generated interpreter code wants to know about the offsets we just computed: 3759 AbstractAssembler::update_delayed_values(); 3760 } 3761 3762 #ifndef PRODUCT 3763 3764 // These functions exist to assert the validity of hard-coded field offsets to guard 3765 // against changes in the class files 3766 3767 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3768 EXCEPTION_MARK; 3769 fieldDescriptor fd; 3770 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3771 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3772 instanceKlassHandle h_klass (THREAD, k); 3773 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3774 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3775 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3776 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3777 return false; 3778 } 3779 if (fd.is_static()) { 3780 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3781 return false; 3782 } 3783 if (fd.offset() == hardcoded_offset ) { 3784 return true; 3785 } else { 3786 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3787 klass_name, field_name, hardcoded_offset, fd.offset()); 3788 return false; 3789 } 3790 } 3791 3792 3793 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3794 EXCEPTION_MARK; 3795 fieldDescriptor fd; 3796 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3797 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3798 instanceKlassHandle h_klass (THREAD, k); 3799 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3800 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3801 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3802 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3803 return false; 3804 } 3805 if (!fd.is_static()) { 3806 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3807 return false; 3808 } 3809 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3810 return true; 3811 } else { 3812 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()); 3813 return false; 3814 } 3815 } 3816 3817 3818 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3819 EXCEPTION_MARK; 3820 fieldDescriptor fd; 3821 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3822 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3823 instanceKlassHandle h_klass (THREAD, k); 3824 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3825 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3826 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3827 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3828 return false; 3829 } 3830 if (!fd.is_static() || !fd.has_initial_value()) { 3831 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3832 return false; 3833 } 3834 if (!fd.initial_value_tag().is_int()) { 3835 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3836 return false; 3837 } 3838 jint field_value = fd.int_initial_value(); 3839 if (field_value == hardcoded_constant) { 3840 return true; 3841 } else { 3842 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); 3843 return false; 3844 } 3845 } 3846 3847 3848 // Check the hard-coded field offsets of all the classes in this file 3849 3850 void JavaClasses::check_offsets() { 3851 bool valid = true; 3852 HandleMark hm; 3853 3854 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3855 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3856 3857 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3858 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3859 3860 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3861 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3862 3863 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3864 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3865 3866 // java.lang.String 3867 3868 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3869 if (java_lang_String::has_hash_field()) { 3870 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3871 } 3872 if (java_lang_String::has_coder_field()) { 3873 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3874 } 3875 3876 // java.lang.Class 3877 3878 // Fake fields 3879 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3880 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3881 3882 // java.lang.Throwable 3883 3884 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3885 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3886 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3887 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3888 3889 // Boxed primitive objects (java_lang_boxing_object) 3890 3891 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3892 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3893 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3894 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3895 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3896 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3897 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3898 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3899 3900 // java.lang.ClassLoader 3901 3902 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3903 3904 // java.lang.System 3905 3906 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3907 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3908 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3909 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3910 3911 // java.lang.StackTraceElement 3912 3913 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3914 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3915 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3916 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3917 3918 // java.lang.ref.Reference 3919 3920 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3921 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3922 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3923 // Fake field 3924 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3925 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3926 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3927 3928 // java.lang.ref.SoftReference 3929 3930 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3931 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3932 3933 // java.lang.AssertionStatusDirectives 3934 // 3935 // The CheckAssertionStatusDirectives boolean can be removed from here and 3936 // globals.hpp after the AssertionStatusDirectives class has been integrated 3937 // into merlin "for some time." Without it, the vm will fail with early 3938 // merlin builds. 3939 3940 if (CheckAssertionStatusDirectives) { 3941 const char* nm = "java/lang/AssertionStatusDirectives"; 3942 const char* sig = "[Ljava/lang/String;"; 3943 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3944 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3945 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3946 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3947 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3948 } 3949 3950 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3951 } 3952 3953 #endif // PRODUCT 3954 3955 int InjectedField::compute_offset() { 3956 InstanceKlass* ik = InstanceKlass::cast(klass()); 3957 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3958 if (!may_be_java && !fs.access_flags().is_internal()) { 3959 // Only look at injected fields 3960 continue; 3961 } 3962 if (fs.name() == name() && fs.signature() == signature()) { 3963 return fs.offset(); 3964 } 3965 } 3966 ResourceMark rm; 3967 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)" : ""); 3968 #ifndef PRODUCT 3969 ik->print(); 3970 tty->print_cr("all fields:"); 3971 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3972 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3973 } 3974 #endif //PRODUCT 3975 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:classload=info to see the origin of the problem class"); 3976 return -1; 3977 } 3978 3979 void javaClasses_init() { 3980 JavaClasses::compute_offsets(); 3981 JavaClasses::check_offsets(); 3982 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3983 }