1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/instanceMirrorKlass.hpp" 39 #include "oops/klass.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "oops/typeArrayOop.hpp" 45 #include "prims/jvmtiRedefineClassesTrace.hpp" 46 #include "runtime/fieldDescriptor.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/safepoint.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.hpp" 54 #include "utilities/preserveException.hpp" 55 56 #if INCLUDE_JVMCI 57 #include "jvmci/jvmciJavaClasses.hpp" 58 #endif 59 60 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 61 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 62 63 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 64 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 65 66 InjectedField JavaClasses::_injected_fields[] = { 67 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 68 }; 69 70 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 71 return _injected_fields[id].compute_offset(); 72 } 73 74 75 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 76 *field_count = 0; 77 78 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 79 if (sid == vmSymbols::NO_SID) { 80 // Only well known classes can inject fields 81 return NULL; 82 } 83 84 int count = 0; 85 int start = -1; 86 87 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 88 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 89 count++; \ 90 if (start == -1) start = klass##_##name##_enum; \ 91 } 92 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 93 #undef LOOKUP_INJECTED_FIELD 94 95 if (start != -1) { 96 *field_count = count; 97 return _injected_fields + start; 98 } 99 return NULL; 100 } 101 102 103 static bool find_field(InstanceKlass* ik, 104 Symbol* name_symbol, Symbol* signature_symbol, 105 fieldDescriptor* fd, 106 bool is_static = false, bool allow_super = false) { 107 if (allow_super || is_static) { 108 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 109 } else { 110 return ik->find_local_field(name_symbol, signature_symbol, fd); 111 } 112 } 113 114 // Helpful routine for computing field offsets at run time rather than hardcoding them 115 static void 116 compute_offset(int &dest_offset, 117 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 118 bool is_static = false, bool allow_super = false) { 119 fieldDescriptor fd; 120 InstanceKlass* ik = InstanceKlass::cast(klass); 121 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 122 ResourceMark rm; 123 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 124 #ifndef PRODUCT 125 ik->print(); 126 tty->print_cr("all fields:"); 127 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 128 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 129 } 130 #endif //PRODUCT 131 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 132 } 133 dest_offset = fd.offset(); 134 } 135 136 // Same as above but for "optional" offsets that might not be present in certain JDK versions 137 static void 138 compute_optional_offset(int& dest_offset, 139 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 140 bool allow_super = false) { 141 fieldDescriptor fd; 142 InstanceKlass* ik = InstanceKlass::cast(klass); 143 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 144 dest_offset = fd.offset(); 145 } 146 } 147 148 149 int java_lang_String::value_offset = 0; 150 int java_lang_String::hash_offset = 0; 151 int java_lang_String::coder_offset = 0; 152 153 bool java_lang_String::initialized = false; 154 155 bool java_lang_String::is_instance(oop obj) { 156 return is_instance_inlined(obj); 157 } 158 159 void java_lang_String::compute_offsets() { 160 assert(!initialized, "offsets should be initialized only once"); 161 162 Klass* k = SystemDictionary::String_klass(); 163 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 164 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 165 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 166 167 initialized = true; 168 } 169 170 class CompactStringsFixup : public FieldClosure { 171 private: 172 bool _value; 173 174 public: 175 CompactStringsFixup(bool value) : _value(value) {} 176 177 void do_field(fieldDescriptor* fd) { 178 if (fd->name() == vmSymbols::compact_strings_name()) { 179 oop mirror = fd->field_holder()->java_mirror(); 180 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 181 assert(mirror != NULL, "String must have mirror already"); 182 mirror->bool_field_put(fd->offset(), _value); 183 } 184 } 185 }; 186 187 void java_lang_String::set_compact_strings(bool value) { 188 CompactStringsFixup fix(value); 189 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 190 } 191 192 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 193 assert(initialized, "Must be initialized"); 194 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 195 196 // Create the String object first, so there's a chance that the String 197 // and the char array it points to end up in the same cache line. 198 oop obj; 199 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 200 201 // Create the char array. The String object must be handlized here 202 // because GC can happen as a result of the allocation attempt. 203 Handle h_obj(THREAD, obj); 204 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 205 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 206 207 // Point the String at the char array 208 obj = h_obj(); 209 set_value(obj, buffer); 210 // No need to zero the offset, allocation zero'ed the entire String object 211 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 212 return h_obj; 213 } 214 215 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 216 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 217 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 218 typeArrayOop buffer = value(h_obj()); 219 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 220 if (is_latin1) { 221 for (int index = 0; index < length; index++) { 222 buffer->byte_at_put(index, (jbyte)unicode[index]); 223 } 224 } else { 225 for (int index = 0; index < length; index++) { 226 buffer->char_at_put(index, unicode[index]); 227 } 228 } 229 230 #ifdef ASSERT 231 { 232 ResourceMark rm; 233 char* expected = UNICODE::as_utf8(unicode, length); 234 char* actual = as_utf8_string(h_obj()); 235 if (strcmp(expected, actual) != 0) { 236 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 237 ShouldNotReachHere(); 238 } 239 } 240 #endif 241 242 return h_obj; 243 } 244 245 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 246 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 247 return h_obj(); 248 } 249 250 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 251 if (utf8_str == NULL) { 252 return Handle(); 253 } 254 bool has_multibyte, is_latin1; 255 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 256 if (!CompactStrings) { 257 has_multibyte = true; 258 is_latin1 = false; 259 } 260 261 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 262 if (length > 0) { 263 if (!has_multibyte) { 264 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 265 } else if (is_latin1) { 266 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 267 } else { 268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 269 } 270 } 271 272 #ifdef ASSERT 273 // This check is too strict because the input string is not necessarily valid UTF8. 274 // For example, it may be created with arbitrary content via jni_NewStringUTF. 275 /* 276 { 277 ResourceMark rm; 278 const char* expected = utf8_str; 279 char* actual = as_utf8_string(h_obj()); 280 if (strcmp(expected, actual) != 0) { 281 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 282 ShouldNotReachHere(); 283 } 284 } 285 */ 286 #endif 287 288 return h_obj; 289 } 290 291 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 292 Handle h_obj = create_from_str(utf8_str, CHECK_0); 293 return h_obj(); 294 } 295 296 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 297 const char* utf8_str = (char*)symbol->bytes(); 298 int utf8_len = symbol->utf8_length(); 299 300 bool has_multibyte, is_latin1; 301 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 302 if (!CompactStrings) { 303 has_multibyte = true; 304 is_latin1 = false; 305 } 306 307 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 308 if (length > 0) { 309 if (!has_multibyte) { 310 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 311 } else if (is_latin1) { 312 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 313 } else { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 315 } 316 } 317 318 #ifdef ASSERT 319 { 320 ResourceMark rm; 321 const char* expected = symbol->as_utf8(); 322 char* actual = as_utf8_string(h_obj()); 323 if (strncmp(expected, actual, utf8_len) != 0) { 324 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 325 ShouldNotReachHere(); 326 } 327 } 328 #endif 329 330 return h_obj; 331 } 332 333 // Converts a C string to a Java String based on current encoding 334 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 335 assert(str != NULL, "bad arguments"); 336 337 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 338 static to_java_string_fn_t _to_java_string_fn = NULL; 339 340 if (_to_java_string_fn == NULL) { 341 void *lib_handle = os::native_java_library(); 342 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 343 if (_to_java_string_fn == NULL) { 344 fatal("NewStringPlatform missing"); 345 } 346 } 347 348 jstring js = NULL; 349 { JavaThread* thread = (JavaThread*)THREAD; 350 assert(thread->is_Java_thread(), "must be java thread"); 351 HandleMark hm(thread); 352 ThreadToNativeFromVM ttn(thread); 353 js = (_to_java_string_fn)(thread->jni_environment(), str); 354 } 355 return Handle(THREAD, JNIHandles::resolve(js)); 356 } 357 358 // Converts a Java String to a native C string that can be used for 359 // native OS calls. 360 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 361 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 362 static to_platform_string_fn_t _to_platform_string_fn = NULL; 363 364 if (_to_platform_string_fn == NULL) { 365 void *lib_handle = os::native_java_library(); 366 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 367 if (_to_platform_string_fn == NULL) { 368 fatal("GetStringPlatformChars missing"); 369 } 370 } 371 372 char *native_platform_string; 373 { JavaThread* thread = (JavaThread*)THREAD; 374 assert(thread->is_Java_thread(), "must be java thread"); 375 JNIEnv *env = thread->jni_environment(); 376 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 377 bool is_copy; 378 HandleMark hm(thread); 379 ThreadToNativeFromVM ttn(thread); 380 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 381 assert(is_copy == JNI_TRUE, "is_copy value changed"); 382 JNIHandles::destroy_local(js); 383 } 384 return native_platform_string; 385 } 386 387 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 388 oop obj = java_string(); 389 // Typical usage is to convert all '/' to '.' in string. 390 typeArrayOop value = java_lang_String::value(obj); 391 int length = java_lang_String::length(obj); 392 bool is_latin1 = java_lang_String::is_latin1(obj); 393 394 // First check if any from_char exist 395 int index; // Declared outside, used later 396 for (index = 0; index < length; index++) { 397 jchar c = !is_latin1 ? value->char_at(index) : 398 ((jchar) value->byte_at(index)) & 0xff; 399 if (c == from_char) { 400 break; 401 } 402 } 403 if (index == length) { 404 // No from_char, so do not copy. 405 return java_string; 406 } 407 408 // Check if result string will be latin1 409 bool to_is_latin1 = false; 410 411 // Replacement char must be latin1 412 if (CompactStrings && UNICODE::is_latin1(to_char)) { 413 if (is_latin1) { 414 // Source string is latin1 as well 415 to_is_latin1 = true; 416 } else if (!UNICODE::is_latin1(from_char)) { 417 // We are replacing an UTF16 char. Scan string to 418 // check if result can be latin1 encoded. 419 to_is_latin1 = true; 420 for (index = 0; index < length; index++) { 421 jchar c = value->char_at(index); 422 if (c != from_char && !UNICODE::is_latin1(c)) { 423 to_is_latin1 = false; 424 break; 425 } 426 } 427 } 428 } 429 430 // Create new UNICODE (or byte) buffer. Must handlize value because GC 431 // may happen during String and char array creation. 432 typeArrayHandle h_value(THREAD, value); 433 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 434 typeArrayOop from_buffer = h_value(); 435 typeArrayOop to_buffer = java_lang_String::value(string()); 436 437 // Copy contents 438 for (index = 0; index < length; index++) { 439 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 440 ((jchar) from_buffer->byte_at(index)) & 0xff; 441 if (c == from_char) { 442 c = to_char; 443 } 444 if (!to_is_latin1) { 445 to_buffer->char_at_put(index, c); 446 } else { 447 to_buffer->byte_at_put(index, (jbyte) c); 448 } 449 } 450 return string; 451 } 452 453 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 454 typeArrayOop value = java_lang_String::value(java_string); 455 length = java_lang_String::length(java_string); 456 bool is_latin1 = java_lang_String::is_latin1(java_string); 457 458 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 459 if (result != NULL) { 460 if (!is_latin1) { 461 for (int index = 0; index < length; index++) { 462 result[index] = value->char_at(index); 463 } 464 } else { 465 for (int index = 0; index < length; index++) { 466 result[index] = ((jchar) value->byte_at(index)) & 0xff; 467 } 468 } 469 } else { 470 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 471 } 472 return result; 473 } 474 475 unsigned int java_lang_String::hash_code(oop java_string) { 476 int length = java_lang_String::length(java_string); 477 // Zero length string will hash to zero with String.hashCode() function. 478 if (length == 0) return 0; 479 480 typeArrayOop value = java_lang_String::value(java_string); 481 bool is_latin1 = java_lang_String::is_latin1(java_string); 482 483 if (is_latin1) { 484 return java_lang_String::hash_code(value->byte_at_addr(0), length); 485 } else { 486 return java_lang_String::hash_code(value->char_at_addr(0), length); 487 } 488 } 489 490 char* java_lang_String::as_quoted_ascii(oop java_string) { 491 typeArrayOop value = java_lang_String::value(java_string); 492 int length = java_lang_String::length(java_string); 493 bool is_latin1 = java_lang_String::is_latin1(java_string); 494 495 if (length == 0) return NULL; 496 497 char* result; 498 int result_length; 499 if (!is_latin1) { 500 jchar* base = value->char_at_addr(0); 501 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 502 result = NEW_RESOURCE_ARRAY(char, result_length); 503 UNICODE::as_quoted_ascii(base, length, result, result_length); 504 } else { 505 jbyte* base = value->byte_at_addr(0); 506 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 507 result = NEW_RESOURCE_ARRAY(char, result_length); 508 UNICODE::as_quoted_ascii(base, length, result, result_length); 509 } 510 assert(result_length >= length + 1, "must not be shorter"); 511 assert(result_length == (int)strlen(result) + 1, "must match"); 512 return result; 513 } 514 515 unsigned int java_lang_String::hash_string(oop java_string) { 516 int length = java_lang_String::length(java_string); 517 // Zero length string doesn't necessarily hash to zero. 518 if (length == 0) { 519 return StringTable::hash_string((jchar*) NULL, 0); 520 } 521 522 typeArrayOop value = java_lang_String::value(java_string); 523 bool is_latin1 = java_lang_String::is_latin1(java_string); 524 if (is_latin1) { 525 return StringTable::hash_string(value->byte_at_addr(0), length); 526 } else { 527 return StringTable::hash_string(value->char_at_addr(0), length); 528 } 529 } 530 531 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 532 oop obj = java_string(); 533 typeArrayOop value = java_lang_String::value(obj); 534 int length = java_lang_String::length(obj); 535 bool is_latin1 = java_lang_String::is_latin1(obj); 536 if (!is_latin1) { 537 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 538 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 539 return sym; 540 } else { 541 ResourceMark rm; 542 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 543 const char* base = UNICODE::as_utf8(position, length); 544 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 545 return sym; 546 } 547 } 548 549 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 if (!is_latin1) { 554 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 555 return SymbolTable::probe_unicode(base, length); 556 } else { 557 ResourceMark rm; 558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 559 const char* base = UNICODE::as_utf8(position, length); 560 return SymbolTable::probe(base, length); 561 } 562 } 563 564 int java_lang_String::utf8_length(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (length == 0) { 569 return 0; 570 } 571 if (!is_latin1) { 572 return UNICODE::utf8_length(value->char_at_addr(0), length); 573 } else { 574 return UNICODE::utf8_length(value->byte_at_addr(0), length); 575 } 576 } 577 578 char* java_lang_String::as_utf8_string(oop java_string) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 584 return UNICODE::as_utf8(position, length); 585 } else { 586 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 587 return UNICODE::as_utf8(position, length); 588 } 589 } 590 591 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 597 return UNICODE::as_utf8(position, length, buf, buflen); 598 } else { 599 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 600 return UNICODE::as_utf8(position, length, buf, buflen); 601 } 602 } 603 604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 605 typeArrayOop value = java_lang_String::value(java_string); 606 int length = java_lang_String::length(java_string); 607 assert(start + len <= length, "just checking"); 608 bool is_latin1 = java_lang_String::is_latin1(java_string); 609 if (!is_latin1) { 610 jchar* position = value->char_at_addr(start); 611 return UNICODE::as_utf8(position, len); 612 } else { 613 jbyte* position = value->byte_at_addr(start); 614 return UNICODE::as_utf8(position, len); 615 } 616 } 617 618 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 619 typeArrayOop value = java_lang_String::value(java_string); 620 int length = java_lang_String::length(java_string); 621 assert(start + len <= length, "just checking"); 622 bool is_latin1 = java_lang_String::is_latin1(java_string); 623 if (!is_latin1) { 624 jchar* position = value->char_at_addr(start); 625 return UNICODE::as_utf8(position, len, buf, buflen); 626 } else { 627 jbyte* position = value->byte_at_addr(start); 628 return UNICODE::as_utf8(position, len, buf, buflen); 629 } 630 } 631 632 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 633 assert(java_string->klass() == SystemDictionary::String_klass(), 634 "must be java_string"); 635 typeArrayOop value = java_lang_String::value(java_string); 636 int length = java_lang_String::length(java_string); 637 if (length != len) { 638 return false; 639 } 640 bool is_latin1 = java_lang_String::is_latin1(java_string); 641 if (!is_latin1) { 642 for (int i = 0; i < len; i++) { 643 if (value->char_at(i) != chars[i]) { 644 return false; 645 } 646 } 647 } else { 648 for (int i = 0; i < len; i++) { 649 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 650 return false; 651 } 652 } 653 } 654 return true; 655 } 656 657 bool java_lang_String::equals(oop str1, oop str2) { 658 assert(str1->klass() == SystemDictionary::String_klass(), 659 "must be java String"); 660 assert(str2->klass() == SystemDictionary::String_klass(), 661 "must be java String"); 662 typeArrayOop value1 = java_lang_String::value(str1); 663 int length1 = java_lang_String::length(str1); 664 bool is_latin1 = java_lang_String::is_latin1(str1); 665 typeArrayOop value2 = java_lang_String::value(str2); 666 int length2 = java_lang_String::length(str2); 667 bool is_latin2 = java_lang_String::is_latin1(str2); 668 669 if ((length1 != length2) || (is_latin1 != is_latin2)) { 670 // Strings of different size or with different 671 // coders are never equal. 672 return false; 673 } 674 int blength1 = value1->length(); 675 for (int i = 0; i < value1->length(); i++) { 676 if (value1->byte_at(i) != value2->byte_at(i)) { 677 return false; 678 } 679 } 680 return true; 681 } 682 683 void java_lang_String::print(oop java_string, outputStream* st) { 684 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 685 typeArrayOop value = java_lang_String::value(java_string); 686 687 if (value == NULL) { 688 // This can happen if, e.g., printing a String 689 // object before its initializer has been called 690 st->print("NULL"); 691 return; 692 } 693 694 int length = java_lang_String::length(java_string); 695 bool is_latin1 = java_lang_String::is_latin1(java_string); 696 697 st->print("\""); 698 for (int index = 0; index < length; index++) { 699 st->print("%c", (!is_latin1) ? value->char_at(index) : 700 ((jchar) value->byte_at(index)) & 0xff ); 701 } 702 st->print("\""); 703 } 704 705 706 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 707 assert(mirror.not_null() && fd->is_static(), "just checking"); 708 if (fd->has_initial_value()) { 709 BasicType t = fd->field_type(); 710 switch (t) { 711 case T_BYTE: 712 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 713 break; 714 case T_BOOLEAN: 715 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 716 break; 717 case T_CHAR: 718 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 719 break; 720 case T_SHORT: 721 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 722 break; 723 case T_INT: 724 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 725 break; 726 case T_FLOAT: 727 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 728 break; 729 case T_DOUBLE: 730 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 731 break; 732 case T_LONG: 733 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 734 break; 735 case T_OBJECT: 736 { 737 #ifdef ASSERT 738 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 739 assert(fd->signature() == sym, "just checking"); 740 #endif 741 oop string = fd->string_initial_value(CHECK); 742 mirror()->obj_field_put(fd->offset(), string); 743 } 744 break; 745 default: 746 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 747 "Illegal ConstantValue attribute in class file"); 748 } 749 } 750 } 751 752 753 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 754 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 755 756 // If the offset was read from the shared archive, it was fixed up already 757 if (!k->is_shared()) { 758 if (k->is_instance_klass()) { 759 // During bootstrap, java.lang.Class wasn't loaded so static field 760 // offsets were computed without the size added it. Go back and 761 // update all the static field offsets to included the size. 762 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 763 if (fs.access_flags().is_static()) { 764 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 765 fs.set_offset(real_offset); 766 } 767 } 768 } 769 } 770 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 771 } 772 773 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 774 Handle mirror, 775 Handle protection_domain, 776 TRAPS) { 777 // Allocate a simple java object for a lock. 778 // This needs to be a java object because during class initialization 779 // it can be held across a java call. 780 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 781 set_init_lock(mirror(), r); 782 783 // Set protection domain also 784 set_protection_domain(mirror(), protection_domain()); 785 786 // Initialize static fields 787 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 788 } 789 790 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 791 Handle protection_domain, TRAPS) { 792 assert(k->java_mirror() == NULL, "should only assign mirror once"); 793 // Use this moment of initialization to cache modifier_flags also, 794 // to support Class.getModifiers(). Instance classes recalculate 795 // the cached flags after the class file is parsed, but before the 796 // class is put into the system dictionary. 797 int computed_modifiers = k->compute_modifier_flags(CHECK); 798 k->set_modifier_flags(computed_modifiers); 799 // Class_klass has to be loaded because it is used to allocate 800 // the mirror. 801 if (SystemDictionary::Class_klass_loaded()) { 802 // Allocate mirror (java.lang.Class instance) 803 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 804 805 // Setup indirection from mirror->klass 806 if (!k.is_null()) { 807 java_lang_Class::set_klass(mirror(), k()); 808 } 809 810 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 811 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 812 813 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 814 815 // It might also have a component mirror. This mirror must already exist. 816 if (k->is_array_klass()) { 817 Handle comp_mirror; 818 if (k->is_typeArray_klass()) { 819 BasicType type = TypeArrayKlass::cast(k())->element_type(); 820 comp_mirror = Universe::java_mirror(type); 821 } else { 822 assert(k->is_objArray_klass(), "Must be"); 823 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 824 assert(element_klass != NULL, "Must have an element klass"); 825 comp_mirror = element_klass->java_mirror(); 826 } 827 assert(comp_mirror.not_null(), "must have a mirror"); 828 829 // Two-way link between the array klass and its component mirror: 830 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 831 set_component_mirror(mirror(), comp_mirror()); 832 set_array_klass(comp_mirror(), k()); 833 } else { 834 assert(k->is_instance_klass(), "Must be"); 835 836 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 837 if (HAS_PENDING_EXCEPTION) { 838 // If any of the fields throws an exception like OOM remove the klass field 839 // from the mirror so GC doesn't follow it after the klass has been deallocated. 840 // This mirror looks like a primitive type, which logically it is because it 841 // it represents no class. 842 java_lang_Class::set_klass(mirror(), NULL); 843 return; 844 } 845 } 846 847 // set the classLoader field in the java_lang_Class instance 848 assert(class_loader() == k->class_loader(), "should be same"); 849 set_class_loader(mirror(), class_loader()); 850 851 // Setup indirection from klass->mirror last 852 // after any exceptions can happen during allocations. 853 if (!k.is_null()) { 854 k->set_java_mirror(mirror()); 855 } 856 } else { 857 if (fixup_mirror_list() == NULL) { 858 GrowableArray<Klass*>* list = 859 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 860 set_fixup_mirror_list(list); 861 } 862 fixup_mirror_list()->push(k()); 863 } 864 } 865 866 867 int java_lang_Class::oop_size(oop java_class) { 868 assert(_oop_size_offset != 0, "must be set"); 869 return java_class->int_field(_oop_size_offset); 870 } 871 void java_lang_Class::set_oop_size(oop java_class, int size) { 872 assert(_oop_size_offset != 0, "must be set"); 873 java_class->int_field_put(_oop_size_offset, size); 874 } 875 int java_lang_Class::static_oop_field_count(oop java_class) { 876 assert(_static_oop_field_count_offset != 0, "must be set"); 877 return java_class->int_field(_static_oop_field_count_offset); 878 } 879 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 880 assert(_static_oop_field_count_offset != 0, "must be set"); 881 java_class->int_field_put(_static_oop_field_count_offset, size); 882 } 883 884 oop java_lang_Class::protection_domain(oop java_class) { 885 assert(_protection_domain_offset != 0, "must be set"); 886 return java_class->obj_field(_protection_domain_offset); 887 } 888 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 889 assert(_protection_domain_offset != 0, "must be set"); 890 java_class->obj_field_put(_protection_domain_offset, pd); 891 } 892 893 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 894 assert(_component_mirror_offset != 0, "must be set"); 895 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 896 } 897 oop java_lang_Class::component_mirror(oop java_class) { 898 assert(_component_mirror_offset != 0, "must be set"); 899 return java_class->obj_field(_component_mirror_offset); 900 } 901 902 oop java_lang_Class::init_lock(oop java_class) { 903 assert(_init_lock_offset != 0, "must be set"); 904 return java_class->obj_field(_init_lock_offset); 905 } 906 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 907 assert(_init_lock_offset != 0, "must be set"); 908 java_class->obj_field_put(_init_lock_offset, init_lock); 909 } 910 911 objArrayOop java_lang_Class::signers(oop java_class) { 912 assert(_signers_offset != 0, "must be set"); 913 return (objArrayOop)java_class->obj_field(_signers_offset); 914 } 915 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 916 assert(_signers_offset != 0, "must be set"); 917 java_class->obj_field_put(_signers_offset, (oop)signers); 918 } 919 920 921 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 922 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 923 if (_class_loader_offset != 0) { 924 java_class->obj_field_put(_class_loader_offset, loader); 925 } 926 } 927 928 oop java_lang_Class::class_loader(oop java_class) { 929 assert(_class_loader_offset != 0, "must be set"); 930 return java_class->obj_field(_class_loader_offset); 931 } 932 933 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 934 // This should be improved by adding a field at the Java level or by 935 // introducing a new VM klass (see comment in ClassFileParser) 936 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 937 if (type != T_VOID) { 938 Klass* aklass = Universe::typeArrayKlassObj(type); 939 assert(aklass != NULL, "correct bootstrap"); 940 set_array_klass(java_class, aklass); 941 } 942 #ifdef ASSERT 943 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 944 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 945 #endif 946 return java_class; 947 } 948 949 950 Klass* java_lang_Class::as_Klass(oop java_class) { 951 //%note memory_2 952 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 953 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 954 assert(k == NULL || k->is_klass(), "type check"); 955 return k; 956 } 957 958 959 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 960 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 961 java_class->metadata_field_put(_klass_offset, klass); 962 } 963 964 965 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 966 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 967 Symbol* name = NULL; 968 bool is_instance = false; 969 if (is_primitive(java_class)) { 970 name = vmSymbols::type_signature(primitive_type(java_class)); 971 } else { 972 Klass* k = as_Klass(java_class); 973 is_instance = k->is_instance_klass(); 974 name = k->name(); 975 } 976 if (name == NULL) { 977 st->print("<null>"); 978 return; 979 } 980 if (is_instance) st->print("L"); 981 st->write((char*) name->base(), (int) name->utf8_length()); 982 if (is_instance) st->print(";"); 983 } 984 985 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 986 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 987 Symbol* name; 988 if (is_primitive(java_class)) { 989 name = vmSymbols::type_signature(primitive_type(java_class)); 990 // Because this can create a new symbol, the caller has to decrement 991 // the refcount, so make adjustment here and below for symbols returned 992 // that are not created or incremented due to a successful lookup. 993 name->increment_refcount(); 994 } else { 995 Klass* k = as_Klass(java_class); 996 if (!k->is_instance_klass()) { 997 name = k->name(); 998 name->increment_refcount(); 999 } else { 1000 ResourceMark rm; 1001 const char* sigstr = k->signature_name(); 1002 int siglen = (int) strlen(sigstr); 1003 if (!intern_if_not_found) { 1004 name = SymbolTable::probe(sigstr, siglen); 1005 } else { 1006 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1007 } 1008 } 1009 } 1010 return name; 1011 } 1012 1013 // Returns the Java name for this Java mirror (Resource allocated) 1014 // See Klass::external_name(). 1015 // For primitive type Java mirrors, its type name is returned. 1016 const char* java_lang_Class::as_external_name(oop java_class) { 1017 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1018 const char* name = NULL; 1019 if (is_primitive(java_class)) { 1020 name = type2name(primitive_type(java_class)); 1021 } else { 1022 name = as_Klass(java_class)->external_name(); 1023 } 1024 if (name == NULL) { 1025 name = "<null>"; 1026 } 1027 return name; 1028 } 1029 1030 Klass* java_lang_Class::array_klass(oop java_class) { 1031 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1032 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1033 return k; 1034 } 1035 1036 1037 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1038 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1039 java_class->metadata_field_put(_array_klass_offset, klass); 1040 } 1041 1042 1043 bool java_lang_Class::is_primitive(oop java_class) { 1044 // should assert: 1045 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1046 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1047 1048 #ifdef ASSERT 1049 if (is_primitive) { 1050 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1051 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1052 "Should be either the T_VOID primitive or a java primitive"); 1053 } 1054 #endif 1055 1056 return is_primitive; 1057 } 1058 1059 1060 BasicType java_lang_Class::primitive_type(oop java_class) { 1061 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1062 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1063 BasicType type = T_VOID; 1064 if (ak != NULL) { 1065 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1066 type = ArrayKlass::cast(ak)->element_type(); 1067 } else { 1068 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1069 } 1070 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1071 return type; 1072 } 1073 1074 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1075 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1076 if (is_primitive(java_class)) { 1077 if (reference_klass != NULL) 1078 (*reference_klass) = NULL; 1079 return primitive_type(java_class); 1080 } else { 1081 if (reference_klass != NULL) 1082 (*reference_klass) = as_Klass(java_class); 1083 return T_OBJECT; 1084 } 1085 } 1086 1087 1088 oop java_lang_Class::primitive_mirror(BasicType t) { 1089 oop mirror = Universe::java_mirror(t); 1090 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1091 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1092 return mirror; 1093 } 1094 1095 bool java_lang_Class::offsets_computed = false; 1096 int java_lang_Class::classRedefinedCount_offset = -1; 1097 1098 void java_lang_Class::compute_offsets() { 1099 assert(!offsets_computed, "offsets should be initialized only once"); 1100 offsets_computed = true; 1101 1102 Klass* k = SystemDictionary::Class_klass(); 1103 // The classRedefinedCount field is only present starting in 1.5, 1104 // so don't go fatal. 1105 compute_optional_offset(classRedefinedCount_offset, 1106 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1107 1108 // Needs to be optional because the old build runs Queens during bootstrapping 1109 // and jdk8-9 doesn't have coordinated pushes yet. 1110 compute_optional_offset(_class_loader_offset, 1111 k, vmSymbols::classLoader_name(), 1112 vmSymbols::classloader_signature()); 1113 1114 compute_offset(_component_mirror_offset, 1115 k, vmSymbols::componentType_name(), 1116 vmSymbols::class_signature()); 1117 1118 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1119 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1120 // GC treats them the same. 1121 _init_lock_offset = _component_mirror_offset; 1122 1123 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1124 } 1125 1126 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1127 if (classRedefinedCount_offset == -1) { 1128 // If we don't have an offset for it then just return -1 as a marker. 1129 return -1; 1130 } 1131 1132 return the_class_mirror->int_field(classRedefinedCount_offset); 1133 } 1134 1135 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1136 if (classRedefinedCount_offset == -1) { 1137 // If we don't have an offset for it then nothing to set. 1138 return; 1139 } 1140 1141 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1142 } 1143 1144 1145 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1146 // platform thread structure, and a eetop offset which was used for thread 1147 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1148 // merged, so in the HotSpot VM we just use the eetop field for the thread 1149 // instead of the privateInfo_offset. 1150 // 1151 // Note: The stackSize field is only present starting in 1.4. 1152 1153 int java_lang_Thread::_name_offset = 0; 1154 int java_lang_Thread::_group_offset = 0; 1155 int java_lang_Thread::_contextClassLoader_offset = 0; 1156 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1157 int java_lang_Thread::_priority_offset = 0; 1158 int java_lang_Thread::_eetop_offset = 0; 1159 int java_lang_Thread::_daemon_offset = 0; 1160 int java_lang_Thread::_stillborn_offset = 0; 1161 int java_lang_Thread::_stackSize_offset = 0; 1162 int java_lang_Thread::_tid_offset = 0; 1163 int java_lang_Thread::_thread_status_offset = 0; 1164 int java_lang_Thread::_park_blocker_offset = 0; 1165 int java_lang_Thread::_park_event_offset = 0 ; 1166 1167 1168 void java_lang_Thread::compute_offsets() { 1169 assert(_group_offset == 0, "offsets should be initialized only once"); 1170 1171 Klass* k = SystemDictionary::Thread_klass(); 1172 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1173 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1174 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1175 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1176 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1177 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1178 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1179 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1180 // The stackSize field is only present starting in 1.4, so don't go fatal. 1181 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1182 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1183 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1184 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1185 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1186 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1187 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1188 vmSymbols::long_signature()); 1189 } 1190 1191 1192 JavaThread* java_lang_Thread::thread(oop java_thread) { 1193 return (JavaThread*)java_thread->address_field(_eetop_offset); 1194 } 1195 1196 1197 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1198 java_thread->address_field_put(_eetop_offset, (address)thread); 1199 } 1200 1201 1202 oop java_lang_Thread::name(oop java_thread) { 1203 return java_thread->obj_field(_name_offset); 1204 } 1205 1206 1207 void java_lang_Thread::set_name(oop java_thread, oop name) { 1208 java_thread->obj_field_put(_name_offset, name); 1209 } 1210 1211 1212 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1213 return (ThreadPriority)java_thread->int_field(_priority_offset); 1214 } 1215 1216 1217 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1218 java_thread->int_field_put(_priority_offset, priority); 1219 } 1220 1221 1222 oop java_lang_Thread::threadGroup(oop java_thread) { 1223 return java_thread->obj_field(_group_offset); 1224 } 1225 1226 1227 bool java_lang_Thread::is_stillborn(oop java_thread) { 1228 return java_thread->bool_field(_stillborn_offset) != 0; 1229 } 1230 1231 1232 // We never have reason to turn the stillborn bit off 1233 void java_lang_Thread::set_stillborn(oop java_thread) { 1234 java_thread->bool_field_put(_stillborn_offset, true); 1235 } 1236 1237 1238 bool java_lang_Thread::is_alive(oop java_thread) { 1239 JavaThread* thr = java_lang_Thread::thread(java_thread); 1240 return (thr != NULL); 1241 } 1242 1243 1244 bool java_lang_Thread::is_daemon(oop java_thread) { 1245 return java_thread->bool_field(_daemon_offset) != 0; 1246 } 1247 1248 1249 void java_lang_Thread::set_daemon(oop java_thread) { 1250 java_thread->bool_field_put(_daemon_offset, true); 1251 } 1252 1253 oop java_lang_Thread::context_class_loader(oop java_thread) { 1254 return java_thread->obj_field(_contextClassLoader_offset); 1255 } 1256 1257 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1258 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1259 } 1260 1261 1262 jlong java_lang_Thread::stackSize(oop java_thread) { 1263 if (_stackSize_offset > 0) { 1264 return java_thread->long_field(_stackSize_offset); 1265 } else { 1266 return 0; 1267 } 1268 } 1269 1270 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1271 void java_lang_Thread::set_thread_status(oop java_thread, 1272 java_lang_Thread::ThreadStatus status) { 1273 // The threadStatus is only present starting in 1.5 1274 if (_thread_status_offset > 0) { 1275 java_thread->int_field_put(_thread_status_offset, status); 1276 } 1277 } 1278 1279 // Read thread status value from threadStatus field in java.lang.Thread java class. 1280 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1281 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1282 JavaThread::current()->thread_state() == _thread_in_vm, 1283 "Java Thread is not running in vm"); 1284 // The threadStatus is only present starting in 1.5 1285 if (_thread_status_offset > 0) { 1286 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1287 } else { 1288 // All we can easily figure out is if it is alive, but that is 1289 // enough info for a valid unknown status. 1290 // These aren't restricted to valid set ThreadStatus values, so 1291 // use JVMTI values and cast. 1292 JavaThread* thr = java_lang_Thread::thread(java_thread); 1293 if (thr == NULL) { 1294 // the thread hasn't run yet or is in the process of exiting 1295 return NEW; 1296 } 1297 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1298 } 1299 } 1300 1301 1302 jlong java_lang_Thread::thread_id(oop java_thread) { 1303 // The thread ID field is only present starting in 1.5 1304 if (_tid_offset > 0) { 1305 return java_thread->long_field(_tid_offset); 1306 } else { 1307 return 0; 1308 } 1309 } 1310 1311 oop java_lang_Thread::park_blocker(oop java_thread) { 1312 assert(JDK_Version::current().supports_thread_park_blocker() && 1313 _park_blocker_offset != 0, "Must support parkBlocker field"); 1314 1315 if (_park_blocker_offset > 0) { 1316 return java_thread->obj_field(_park_blocker_offset); 1317 } 1318 1319 return NULL; 1320 } 1321 1322 jlong java_lang_Thread::park_event(oop java_thread) { 1323 if (_park_event_offset > 0) { 1324 return java_thread->long_field(_park_event_offset); 1325 } 1326 return 0; 1327 } 1328 1329 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1330 if (_park_event_offset > 0) { 1331 java_thread->long_field_put(_park_event_offset, ptr); 1332 return true; 1333 } 1334 return false; 1335 } 1336 1337 1338 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1339 assert(_thread_status_offset != 0, "Must have thread status"); 1340 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1341 switch (status) { 1342 case NEW : return "NEW"; 1343 case RUNNABLE : return "RUNNABLE"; 1344 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1345 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1346 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1347 case PARKED : return "WAITING (parking)"; 1348 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1349 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1350 case TERMINATED : return "TERMINATED"; 1351 default : return "UNKNOWN"; 1352 }; 1353 } 1354 int java_lang_ThreadGroup::_parent_offset = 0; 1355 int java_lang_ThreadGroup::_name_offset = 0; 1356 int java_lang_ThreadGroup::_threads_offset = 0; 1357 int java_lang_ThreadGroup::_groups_offset = 0; 1358 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1359 int java_lang_ThreadGroup::_destroyed_offset = 0; 1360 int java_lang_ThreadGroup::_daemon_offset = 0; 1361 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1362 int java_lang_ThreadGroup::_nthreads_offset = 0; 1363 int java_lang_ThreadGroup::_ngroups_offset = 0; 1364 1365 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1366 assert(java_thread_group->is_oop(), "thread group must be oop"); 1367 return java_thread_group->obj_field(_parent_offset); 1368 } 1369 1370 // ("name as oop" accessor is not necessary) 1371 1372 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1373 oop name = java_thread_group->obj_field(_name_offset); 1374 // ThreadGroup.name can be null 1375 if (name != NULL) { 1376 return java_lang_String::as_utf8_string(name); 1377 } 1378 return NULL; 1379 } 1380 1381 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1382 assert(java_thread_group->is_oop(), "thread group must be oop"); 1383 return java_thread_group->int_field(_nthreads_offset); 1384 } 1385 1386 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1387 oop threads = java_thread_group->obj_field(_threads_offset); 1388 assert(threads != NULL, "threadgroups should have threads"); 1389 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1390 return objArrayOop(threads); 1391 } 1392 1393 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1394 assert(java_thread_group->is_oop(), "thread group must be oop"); 1395 return java_thread_group->int_field(_ngroups_offset); 1396 } 1397 1398 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1399 oop groups = java_thread_group->obj_field(_groups_offset); 1400 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1401 return objArrayOop(groups); 1402 } 1403 1404 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1405 assert(java_thread_group->is_oop(), "thread group must be oop"); 1406 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1407 } 1408 1409 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1410 assert(java_thread_group->is_oop(), "thread group must be oop"); 1411 return java_thread_group->bool_field(_destroyed_offset) != 0; 1412 } 1413 1414 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1415 assert(java_thread_group->is_oop(), "thread group must be oop"); 1416 return java_thread_group->bool_field(_daemon_offset) != 0; 1417 } 1418 1419 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1420 assert(java_thread_group->is_oop(), "thread group must be oop"); 1421 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1422 } 1423 1424 void java_lang_ThreadGroup::compute_offsets() { 1425 assert(_parent_offset == 0, "offsets should be initialized only once"); 1426 1427 Klass* k = SystemDictionary::ThreadGroup_klass(); 1428 1429 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1430 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1431 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1432 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1433 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1434 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1435 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1436 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1437 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1438 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1439 } 1440 1441 oop java_lang_Throwable::unassigned_stacktrace() { 1442 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1443 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1444 if (UseCompressedOops) { 1445 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1446 } else { 1447 return oopDesc::load_decode_heap_oop((oop*)addr); 1448 } 1449 } 1450 1451 oop java_lang_Throwable::backtrace(oop throwable) { 1452 return throwable->obj_field_acquire(backtrace_offset); 1453 } 1454 1455 1456 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1457 throwable->release_obj_field_put(backtrace_offset, value); 1458 } 1459 1460 1461 oop java_lang_Throwable::message(oop throwable) { 1462 return throwable->obj_field(detailMessage_offset); 1463 } 1464 1465 1466 oop java_lang_Throwable::message(Handle throwable) { 1467 return throwable->obj_field(detailMessage_offset); 1468 } 1469 1470 1471 // Return Symbol for detailed_message or NULL 1472 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1473 PRESERVE_EXCEPTION_MARK; // Keep original exception 1474 oop detailed_message = java_lang_Throwable::message(throwable); 1475 if (detailed_message != NULL) { 1476 return java_lang_String::as_symbol(detailed_message, THREAD); 1477 } 1478 return NULL; 1479 } 1480 1481 void java_lang_Throwable::set_message(oop throwable, oop value) { 1482 throwable->obj_field_put(detailMessage_offset, value); 1483 } 1484 1485 1486 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1487 throwable->obj_field_put(stackTrace_offset, st_element_array); 1488 } 1489 1490 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1491 set_stacktrace(throwable, NULL); 1492 } 1493 1494 1495 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1496 ResourceMark rm; 1497 Klass* k = throwable->klass(); 1498 assert(k != NULL, "just checking"); 1499 st->print("%s", k->external_name()); 1500 oop msg = message(throwable); 1501 if (msg != NULL) { 1502 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1503 } 1504 } 1505 1506 1507 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1508 ResourceMark rm; 1509 Klass* k = throwable->klass(); 1510 assert(k != NULL, "just checking"); 1511 st->print("%s", k->external_name()); 1512 oop msg = message(throwable); 1513 if (msg != NULL) { 1514 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1515 } 1516 } 1517 1518 // After this many redefines, the stack trace is unreliable. 1519 const int MAX_VERSION = USHRT_MAX; 1520 1521 static inline bool version_matches(Method* method, int version) { 1522 assert(version < MAX_VERSION, "version is too big"); 1523 return method != NULL && (method->constants()->version() == version); 1524 } 1525 1526 // This class provides a simple wrapper over the internal structure of 1527 // exception backtrace to insulate users of the backtrace from needing 1528 // to know what it looks like. 1529 class BacktraceBuilder: public StackObj { 1530 private: 1531 Handle _backtrace; 1532 objArrayOop _head; 1533 typeArrayOop _methods; 1534 typeArrayOop _bcis; 1535 objArrayOop _mirrors; 1536 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1537 int _index; 1538 No_Safepoint_Verifier _nsv; 1539 1540 public: 1541 1542 enum { 1543 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1544 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1545 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1546 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1547 trace_next_offset = java_lang_Throwable::trace_next_offset, 1548 trace_size = java_lang_Throwable::trace_size, 1549 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1550 }; 1551 1552 // get info out of chunks 1553 static typeArrayOop get_methods(objArrayHandle chunk) { 1554 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1555 assert(methods != NULL, "method array should be initialized in backtrace"); 1556 return methods; 1557 } 1558 static typeArrayOop get_bcis(objArrayHandle chunk) { 1559 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1560 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1561 return bcis; 1562 } 1563 static objArrayOop get_mirrors(objArrayHandle chunk) { 1564 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1565 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1566 return mirrors; 1567 } 1568 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1569 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1570 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1571 return cprefs; 1572 } 1573 1574 // constructor for new backtrace 1575 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1576 expand(CHECK); 1577 _backtrace = _head; 1578 _index = 0; 1579 } 1580 1581 BacktraceBuilder(objArrayHandle backtrace) { 1582 _methods = get_methods(backtrace); 1583 _bcis = get_bcis(backtrace); 1584 _mirrors = get_mirrors(backtrace); 1585 _cprefs = get_cprefs(backtrace); 1586 assert(_methods->length() == _bcis->length() && 1587 _methods->length() == _mirrors->length(), 1588 "method and source information arrays should match"); 1589 1590 // head is the preallocated backtrace 1591 _backtrace = _head = backtrace(); 1592 _index = 0; 1593 } 1594 1595 void expand(TRAPS) { 1596 objArrayHandle old_head(THREAD, _head); 1597 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1598 1599 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1600 objArrayHandle new_head(THREAD, head); 1601 1602 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1603 typeArrayHandle new_methods(THREAD, methods); 1604 1605 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1606 typeArrayHandle new_bcis(THREAD, bcis); 1607 1608 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1609 objArrayHandle new_mirrors(THREAD, mirrors); 1610 1611 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1612 typeArrayHandle new_cprefs(THREAD, cprefs); 1613 1614 if (!old_head.is_null()) { 1615 old_head->obj_at_put(trace_next_offset, new_head()); 1616 } 1617 new_head->obj_at_put(trace_methods_offset, new_methods()); 1618 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1619 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1620 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1621 1622 _head = new_head(); 1623 _methods = new_methods(); 1624 _bcis = new_bcis(); 1625 _mirrors = new_mirrors(); 1626 _cprefs = new_cprefs(); 1627 _index = 0; 1628 } 1629 1630 oop backtrace() { 1631 return _backtrace(); 1632 } 1633 1634 inline void push(Method* method, int bci, TRAPS) { 1635 // Smear the -1 bci to 0 since the array only holds unsigned 1636 // shorts. The later line number lookup would just smear the -1 1637 // to a 0 even if it could be recorded. 1638 if (bci == SynchronizationEntryBCI) bci = 0; 1639 1640 if (_index >= trace_chunk_size) { 1641 methodHandle mhandle(THREAD, method); 1642 expand(CHECK); 1643 method = mhandle(); 1644 } 1645 1646 _methods->short_at_put(_index, method->orig_method_idnum()); 1647 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1648 _cprefs->short_at_put(_index, method->name_index()); 1649 1650 // We need to save the mirrors in the backtrace to keep the class 1651 // from being unloaded while we still have this stack trace. 1652 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1653 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1654 _index++; 1655 } 1656 1657 }; 1658 1659 // Print stack trace element to resource allocated buffer 1660 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1661 int method_id, int version, int bci, int cpref) { 1662 1663 // Get strings and string lengths 1664 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1665 const char* klass_name = holder->external_name(); 1666 int buf_len = (int)strlen(klass_name); 1667 1668 Method* method = holder->method_with_orig_idnum(method_id, version); 1669 1670 // The method can be NULL if the requested class version is gone 1671 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1672 char* method_name = sym->as_C_string(); 1673 buf_len += (int)strlen(method_name); 1674 1675 char* source_file_name = NULL; 1676 Symbol* source = Backtrace::get_source_file_name(holder, version); 1677 if (source != NULL) { 1678 source_file_name = source->as_C_string(); 1679 buf_len += (int)strlen(source_file_name); 1680 } 1681 1682 // Allocate temporary buffer with extra space for formatting and line number 1683 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1684 1685 // Print stack trace line in buffer 1686 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1687 1688 if (!version_matches(method, version)) { 1689 strcat(buf, "(Redefined)"); 1690 } else { 1691 int line_number = Backtrace::get_line_number(method, bci); 1692 if (line_number == -2) { 1693 strcat(buf, "(Native Method)"); 1694 } else { 1695 if (source_file_name != NULL && (line_number != -1)) { 1696 // Sourcename and linenumber 1697 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1698 } else if (source_file_name != NULL) { 1699 // Just sourcename 1700 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1701 } else { 1702 // Neither sourcename nor linenumber 1703 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1704 } 1705 nmethod* nm = method->code(); 1706 if (WizardMode && nm != NULL) { 1707 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1708 } 1709 } 1710 } 1711 1712 return buf; 1713 } 1714 1715 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1716 int method_id, int version, int bci, int cpref) { 1717 ResourceMark rm; 1718 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1719 st->print_cr("%s", buf); 1720 } 1721 1722 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1723 Handle mirror = method->method_holder()->java_mirror(); 1724 int method_id = method->orig_method_idnum(); 1725 int version = method->constants()->version(); 1726 int cpref = method->name_index(); 1727 print_stack_element(st, mirror, method_id, version, bci, cpref); 1728 } 1729 1730 const char* java_lang_Throwable::no_stack_trace_message() { 1731 return "\t<<no stack trace available>>"; 1732 } 1733 1734 1735 // Currently used only for exceptions occurring during startup 1736 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1737 Thread *THREAD = Thread::current(); 1738 Handle h_throwable(THREAD, throwable); 1739 while (h_throwable.not_null()) { 1740 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1741 if (result.is_null()) { 1742 st->print_raw_cr(no_stack_trace_message()); 1743 return; 1744 } 1745 1746 while (result.not_null()) { 1747 1748 // Get method id, bci, version and mirror from chunk 1749 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1750 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1751 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1752 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1753 1754 int length = methods()->length(); 1755 for (int index = 0; index < length; index++) { 1756 Handle mirror(THREAD, mirrors->obj_at(index)); 1757 // NULL mirror means end of stack trace 1758 if (mirror.is_null()) goto handle_cause; 1759 int method = methods->short_at(index); 1760 int version = Backtrace::version_at(bcis->int_at(index)); 1761 int bci = Backtrace::bci_at(bcis->int_at(index)); 1762 int cpref = cprefs->short_at(index); 1763 print_stack_element(st, mirror, method, version, bci, cpref); 1764 } 1765 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1766 } 1767 handle_cause: 1768 { 1769 EXCEPTION_MARK; 1770 JavaValue cause(T_OBJECT); 1771 JavaCalls::call_virtual(&cause, 1772 h_throwable, 1773 KlassHandle(THREAD, h_throwable->klass()), 1774 vmSymbols::getCause_name(), 1775 vmSymbols::void_throwable_signature(), 1776 THREAD); 1777 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1778 if (HAS_PENDING_EXCEPTION) { 1779 CLEAR_PENDING_EXCEPTION; 1780 h_throwable = Handle(); 1781 } else { 1782 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1783 if (h_throwable.not_null()) { 1784 st->print("Caused by: "); 1785 print(h_throwable, st); 1786 st->cr(); 1787 } 1788 } 1789 } 1790 } 1791 } 1792 1793 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1794 if (!StackTraceInThrowable) return; 1795 ResourceMark rm(THREAD); 1796 1797 // Start out by clearing the backtrace for this object, in case the VM 1798 // runs out of memory while allocating the stack trace 1799 set_backtrace(throwable(), NULL); 1800 // Clear lazily constructed Java level stacktrace if refilling occurs 1801 // This is unnecessary in 1.7+ but harmless 1802 clear_stacktrace(throwable()); 1803 1804 int max_depth = MaxJavaStackTraceDepth; 1805 JavaThread* thread = (JavaThread*)THREAD; 1806 BacktraceBuilder bt(CHECK); 1807 1808 // If there is no Java frame just return the method that was being called 1809 // with bci 0 1810 if (!thread->has_last_Java_frame()) { 1811 if (max_depth >= 1 && method() != NULL) { 1812 bt.push(method(), 0, CHECK); 1813 set_backtrace(throwable(), bt.backtrace()); 1814 } 1815 return; 1816 } 1817 1818 // Instead of using vframe directly, this version of fill_in_stack_trace 1819 // basically handles everything by hand. This significantly improved the 1820 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1821 // See bug 6333838 for more details. 1822 // The "ASSERT" here is to verify this method generates the exactly same stack 1823 // trace as utilizing vframe. 1824 #ifdef ASSERT 1825 vframeStream st(thread); 1826 methodHandle st_method(THREAD, st.method()); 1827 #endif 1828 int total_count = 0; 1829 RegisterMap map(thread, false); 1830 int decode_offset = 0; 1831 nmethod* nm = NULL; 1832 bool skip_fillInStackTrace_check = false; 1833 bool skip_throwableInit_check = false; 1834 bool skip_hidden = !ShowHiddenFrames; 1835 1836 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1837 Method* method = NULL; 1838 int bci = 0; 1839 1840 // Compiled java method case. 1841 if (decode_offset != 0) { 1842 DebugInfoReadStream stream(nm, decode_offset); 1843 decode_offset = stream.read_int(); 1844 method = (Method*)nm->metadata_at(stream.read_int()); 1845 bci = stream.read_bci(); 1846 } else { 1847 if (fr.is_first_frame()) break; 1848 address pc = fr.pc(); 1849 if (fr.is_interpreted_frame()) { 1850 address bcp = fr.interpreter_frame_bcp(); 1851 method = fr.interpreter_frame_method(); 1852 bci = method->bci_from(bcp); 1853 fr = fr.sender(&map); 1854 } else { 1855 CodeBlob* cb = fr.cb(); 1856 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1857 // but non nmethod 1858 fr = fr.sender(&map); 1859 if (cb == NULL || !cb->is_nmethod()) { 1860 continue; 1861 } 1862 nm = (nmethod*)cb; 1863 if (nm->method()->is_native()) { 1864 method = nm->method(); 1865 bci = 0; 1866 } else { 1867 PcDesc* pd = nm->pc_desc_at(pc); 1868 decode_offset = pd->scope_decode_offset(); 1869 // if decode_offset is not equal to 0, it will execute the 1870 // "compiled java method case" at the beginning of the loop. 1871 continue; 1872 } 1873 } 1874 } 1875 #ifdef ASSERT 1876 assert(st_method() == method && st.bci() == bci, 1877 "Wrong stack trace"); 1878 st.next(); 1879 // vframeStream::method isn't GC-safe so store off a copy 1880 // of the Method* in case we GC. 1881 if (!st.at_end()) { 1882 st_method = st.method(); 1883 } 1884 #endif 1885 1886 // the format of the stacktrace will be: 1887 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1888 // - 0 or more <init> methods for the exception class (skipped) 1889 // - rest of the stack 1890 1891 if (!skip_fillInStackTrace_check) { 1892 if (method->name() == vmSymbols::fillInStackTrace_name() && 1893 throwable->is_a(method->method_holder())) { 1894 continue; 1895 } 1896 else { 1897 skip_fillInStackTrace_check = true; // gone past them all 1898 } 1899 } 1900 if (!skip_throwableInit_check) { 1901 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1902 1903 // skip <init> methods of the exception class and superclasses 1904 // This is simlar to classic VM. 1905 if (method->name() == vmSymbols::object_initializer_name() && 1906 throwable->is_a(method->method_holder())) { 1907 continue; 1908 } else { 1909 // there are none or we've seen them all - either way stop checking 1910 skip_throwableInit_check = true; 1911 } 1912 } 1913 if (method->is_hidden()) { 1914 if (skip_hidden) continue; 1915 } 1916 bt.push(method, bci, CHECK); 1917 total_count++; 1918 } 1919 1920 // Put completed stack trace into throwable object 1921 set_backtrace(throwable(), bt.backtrace()); 1922 } 1923 1924 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 1925 // No-op if stack trace is disabled 1926 if (!StackTraceInThrowable) { 1927 return; 1928 } 1929 1930 // Disable stack traces for some preallocated out of memory errors 1931 if (!Universe::should_fill_in_stack_trace(throwable)) { 1932 return; 1933 } 1934 1935 PRESERVE_EXCEPTION_MARK; 1936 1937 JavaThread* thread = JavaThread::active(); 1938 fill_in_stack_trace(throwable, method, thread); 1939 // ignore exceptions thrown during stack trace filling 1940 CLEAR_PENDING_EXCEPTION; 1941 } 1942 1943 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1944 // Allocate stack trace - backtrace is created but not filled in 1945 1946 // No-op if stack trace is disabled 1947 if (!StackTraceInThrowable) return; 1948 BacktraceBuilder bt(CHECK); // creates a backtrace 1949 set_backtrace(throwable(), bt.backtrace()); 1950 } 1951 1952 1953 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1954 // Fill in stack trace into preallocated backtrace (no GC) 1955 1956 // No-op if stack trace is disabled 1957 if (!StackTraceInThrowable) return; 1958 1959 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1960 1961 JavaThread* THREAD = JavaThread::current(); 1962 1963 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1964 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1965 1966 ResourceMark rm(THREAD); 1967 vframeStream st(THREAD); 1968 1969 BacktraceBuilder bt(backtrace); 1970 1971 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1972 // methods as preallocated errors aren't created by "java" code. 1973 1974 // fill in as much stack trace as possible 1975 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1976 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1977 int chunk_count = 0; 1978 1979 for (;!st.at_end(); st.next()) { 1980 bt.push(st.method(), st.bci(), CHECK); 1981 chunk_count++; 1982 1983 // Bail-out for deep stacks 1984 if (chunk_count >= max_chunks) break; 1985 } 1986 1987 // We support the Throwable immutability protocol defined for Java 7. 1988 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1989 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1990 } 1991 1992 1993 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1994 if (throwable == NULL) { 1995 THROW_0(vmSymbols::java_lang_NullPointerException()); 1996 } 1997 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1998 int depth = 0; 1999 if (chunk != NULL) { 2000 // Iterate over chunks and count full ones 2001 while (true) { 2002 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 2003 if (next == NULL) break; 2004 depth += trace_chunk_size; 2005 chunk = next; 2006 } 2007 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 2008 // Count element in remaining partial chunk. NULL value for mirror 2009 // marks the end of the stack trace elements that are saved. 2010 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2011 assert(mirrors != NULL, "sanity check"); 2012 for (int i = 0; i < mirrors->length(); i++) { 2013 if (mirrors->obj_at(i) == NULL) break; 2014 depth++; 2015 } 2016 } 2017 return depth; 2018 } 2019 2020 2021 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 2022 if (throwable == NULL) { 2023 THROW_0(vmSymbols::java_lang_NullPointerException()); 2024 } 2025 if (index < 0) { 2026 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2027 } 2028 // Compute how many chunks to skip and index into actual chunk 2029 objArrayOop chunk = objArrayOop(backtrace(throwable)); 2030 int skip_chunks = index / trace_chunk_size; 2031 int chunk_index = index % trace_chunk_size; 2032 while (chunk != NULL && skip_chunks > 0) { 2033 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 2034 skip_chunks--; 2035 } 2036 if (chunk == NULL) { 2037 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2038 } 2039 // Get method id, bci, version, mirror and cpref from chunk 2040 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 2041 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 2042 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 2043 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 2044 2045 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 2046 2047 int method = methods->short_at(chunk_index); 2048 int version = Backtrace::version_at(bcis->int_at(chunk_index)); 2049 int bci = Backtrace::bci_at(bcis->int_at(chunk_index)); 2050 int cpref = cprefs->short_at(chunk_index); 2051 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 2052 2053 // Chunk can be partial full 2054 if (mirror.is_null()) { 2055 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 2056 } 2057 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 2058 return element; 2059 } 2060 2061 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 2062 int version, int bci, int cpref, TRAPS) { 2063 // Allocate java.lang.StackTraceElement instance 2064 Klass* k = SystemDictionary::StackTraceElement_klass(); 2065 assert(k != NULL, "must be loaded in 1.4+"); 2066 instanceKlassHandle ik (THREAD, k); 2067 if (ik->should_be_initialized()) { 2068 ik->initialize(CHECK_0); 2069 } 2070 2071 Handle element = ik->allocate_instance_handle(CHECK_0); 2072 2073 // Fill in class name 2074 ResourceMark rm(THREAD); 2075 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2076 const char* str = holder->external_name(); 2077 oop classname = StringTable::intern((char*) str, CHECK_0); 2078 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2079 2080 Method* method = holder->method_with_orig_idnum(method_id, version); 2081 2082 // The method can be NULL if the requested class version is gone 2083 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 2084 2085 // Fill in method name 2086 oop methodname = StringTable::intern(sym, CHECK_0); 2087 java_lang_StackTraceElement::set_methodName(element(), methodname); 2088 2089 if (!version_matches(method, version)) { 2090 // The method was redefined, accurate line number information isn't available 2091 java_lang_StackTraceElement::set_fileName(element(), NULL); 2092 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2093 } else { 2094 // Fill in source file name and line number. 2095 Symbol* source = Backtrace::get_source_file_name(holder, version); 2096 if (ShowHiddenFrames && source == NULL) 2097 source = vmSymbols::unknown_class_name(); 2098 oop filename = StringTable::intern(source, CHECK_0); 2099 java_lang_StackTraceElement::set_fileName(element(), filename); 2100 2101 int line_number = Backtrace::get_line_number(method, bci); 2102 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2103 } 2104 return element(); 2105 } 2106 2107 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2108 Handle mirror (THREAD, method->method_holder()->java_mirror()); 2109 int method_id = method->orig_method_idnum(); 2110 int cpref = method->name_index(); 2111 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 2112 } 2113 2114 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2115 if (MemberNameInStackFrame) { 2116 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2117 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2118 // we should expand MemberName::name when Throwable uses StackTrace 2119 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2120 return method; 2121 } else { 2122 short mid = stackFrame->short_field(_mid_offset); 2123 short version = stackFrame->short_field(_version_offset); 2124 return holder->method_with_orig_idnum(mid, version); 2125 } 2126 } 2127 2128 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) { 2129 if (MemberNameInStackFrame) { 2130 return holder->source_file_name(); 2131 } else { 2132 short version = stackFrame->short_field(_version_offset); 2133 return Backtrace::get_source_file_name(holder, version); 2134 } 2135 } 2136 2137 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2138 // set Method* or mid/cpref 2139 if (MemberNameInStackFrame) { 2140 oop mname = stackFrame->obj_field(_memberName_offset); 2141 InstanceKlass* ik = method->method_holder(); 2142 CallInfo info(method(), ik); 2143 MethodHandles::init_method_MemberName(mname, info); 2144 } else { 2145 int mid = method->orig_method_idnum(); 2146 int cpref = method->name_index(); 2147 assert((jushort)mid == mid, "mid should be short"); 2148 assert((jushort)cpref == cpref, "cpref should be short"); 2149 java_lang_StackFrameInfo::set_mid(stackFrame(), (short)mid); 2150 java_lang_StackFrameInfo::set_cpref(stackFrame(), (short)cpref); 2151 } 2152 // set bci 2153 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2154 // method may be redefined; store the version 2155 int version = method->constants()->version(); 2156 assert((jushort)version == version, "version should be short"); 2157 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2158 } 2159 2160 void java_lang_StackFrameInfo::fill_methodInfo(Handle stackFrame, TRAPS) { 2161 ResourceMark rm(THREAD); 2162 oop k = stackFrame->obj_field(_declaringClass_offset); 2163 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k)); 2164 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2165 int bci = stackFrame->int_field(_bci_offset); 2166 2167 // The method can be NULL if the requested class version is gone 2168 Symbol* sym = (method != NULL) ? method->name() : NULL; 2169 if (MemberNameInStackFrame) { 2170 assert(sym != NULL, "MemberName must have method name"); 2171 } else { 2172 // The method can be NULL if the requested class version is gone 2173 if (sym == NULL) { 2174 short cpref = stackFrame->short_field(_cpref_offset); 2175 sym = holder->constants()->symbol_at(cpref); 2176 } 2177 } 2178 2179 // set method name 2180 oop methodname = StringTable::intern(sym, CHECK); 2181 java_lang_StackFrameInfo::set_methodName(stackFrame(), methodname); 2182 2183 // set file name and line number 2184 Symbol* source = get_file_name(stackFrame, holder); 2185 if (source != NULL) { 2186 oop filename = StringTable::intern(source, CHECK); 2187 java_lang_StackFrameInfo::set_fileName(stackFrame(), filename); 2188 } 2189 2190 // if the method has been redefined, the bci is no longer applicable 2191 short version = stackFrame->short_field(_version_offset); 2192 if (version_matches(method, version)) { 2193 int line_number = Backtrace::get_line_number(method, bci); 2194 java_lang_StackFrameInfo::set_lineNumber(stackFrame(), line_number); 2195 } 2196 } 2197 2198 void java_lang_StackFrameInfo::compute_offsets() { 2199 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2200 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2201 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2202 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::int_signature()); 2203 compute_offset(_methodName_offset, k, vmSymbols::methodName_name(), vmSymbols::string_signature()); 2204 compute_offset(_fileName_offset, k, vmSymbols::fileName_name(), vmSymbols::string_signature()); 2205 compute_offset(_lineNumber_offset, k, vmSymbols::lineNumber_name(), vmSymbols::int_signature()); 2206 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2207 } 2208 2209 void java_lang_LiveStackFrameInfo::compute_offsets() { 2210 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2211 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2212 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2213 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2214 } 2215 2216 void java_lang_reflect_AccessibleObject::compute_offsets() { 2217 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2218 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2219 } 2220 2221 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2223 return (jboolean) reflect->bool_field(override_offset); 2224 } 2225 2226 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2228 reflect->bool_field_put(override_offset, (int) value); 2229 } 2230 2231 void java_lang_reflect_Method::compute_offsets() { 2232 Klass* k = SystemDictionary::reflect_Method_klass(); 2233 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2234 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2235 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2236 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2237 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2238 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2239 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2240 // The generic signature and annotations fields are only present in 1.5 2241 signature_offset = -1; 2242 annotations_offset = -1; 2243 parameter_annotations_offset = -1; 2244 annotation_default_offset = -1; 2245 type_annotations_offset = -1; 2246 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2247 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2248 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2249 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2250 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2251 } 2252 2253 Handle java_lang_reflect_Method::create(TRAPS) { 2254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2255 Klass* klass = SystemDictionary::reflect_Method_klass(); 2256 // This class is eagerly initialized during VM initialization, since we keep a refence 2257 // to one of the methods 2258 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2259 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2260 } 2261 2262 oop java_lang_reflect_Method::clazz(oop reflect) { 2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2264 return reflect->obj_field(clazz_offset); 2265 } 2266 2267 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2269 reflect->obj_field_put(clazz_offset, value); 2270 } 2271 2272 int java_lang_reflect_Method::slot(oop reflect) { 2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2274 return reflect->int_field(slot_offset); 2275 } 2276 2277 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2279 reflect->int_field_put(slot_offset, value); 2280 } 2281 2282 oop java_lang_reflect_Method::name(oop method) { 2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2284 return method->obj_field(name_offset); 2285 } 2286 2287 void java_lang_reflect_Method::set_name(oop method, oop value) { 2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2289 method->obj_field_put(name_offset, value); 2290 } 2291 2292 oop java_lang_reflect_Method::return_type(oop method) { 2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2294 return method->obj_field(returnType_offset); 2295 } 2296 2297 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2299 method->obj_field_put(returnType_offset, value); 2300 } 2301 2302 oop java_lang_reflect_Method::parameter_types(oop method) { 2303 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2304 return method->obj_field(parameterTypes_offset); 2305 } 2306 2307 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2309 method->obj_field_put(parameterTypes_offset, value); 2310 } 2311 2312 oop java_lang_reflect_Method::exception_types(oop method) { 2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2314 return method->obj_field(exceptionTypes_offset); 2315 } 2316 2317 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2319 method->obj_field_put(exceptionTypes_offset, value); 2320 } 2321 2322 int java_lang_reflect_Method::modifiers(oop method) { 2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2324 return method->int_field(modifiers_offset); 2325 } 2326 2327 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2329 method->int_field_put(modifiers_offset, value); 2330 } 2331 2332 bool java_lang_reflect_Method::has_signature_field() { 2333 return (signature_offset >= 0); 2334 } 2335 2336 oop java_lang_reflect_Method::signature(oop method) { 2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2338 assert(has_signature_field(), "signature field must be present"); 2339 return method->obj_field(signature_offset); 2340 } 2341 2342 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2344 assert(has_signature_field(), "signature field must be present"); 2345 method->obj_field_put(signature_offset, value); 2346 } 2347 2348 bool java_lang_reflect_Method::has_annotations_field() { 2349 return (annotations_offset >= 0); 2350 } 2351 2352 oop java_lang_reflect_Method::annotations(oop method) { 2353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2354 assert(has_annotations_field(), "annotations field must be present"); 2355 return method->obj_field(annotations_offset); 2356 } 2357 2358 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2360 assert(has_annotations_field(), "annotations field must be present"); 2361 method->obj_field_put(annotations_offset, value); 2362 } 2363 2364 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2365 return (parameter_annotations_offset >= 0); 2366 } 2367 2368 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2370 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2371 return method->obj_field(parameter_annotations_offset); 2372 } 2373 2374 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2376 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2377 method->obj_field_put(parameter_annotations_offset, value); 2378 } 2379 2380 bool java_lang_reflect_Method::has_annotation_default_field() { 2381 return (annotation_default_offset >= 0); 2382 } 2383 2384 oop java_lang_reflect_Method::annotation_default(oop method) { 2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2386 assert(has_annotation_default_field(), "annotation default field must be present"); 2387 return method->obj_field(annotation_default_offset); 2388 } 2389 2390 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2392 assert(has_annotation_default_field(), "annotation default field must be present"); 2393 method->obj_field_put(annotation_default_offset, value); 2394 } 2395 2396 bool java_lang_reflect_Method::has_type_annotations_field() { 2397 return (type_annotations_offset >= 0); 2398 } 2399 2400 oop java_lang_reflect_Method::type_annotations(oop method) { 2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2402 assert(has_type_annotations_field(), "type_annotations field must be present"); 2403 return method->obj_field(type_annotations_offset); 2404 } 2405 2406 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2408 assert(has_type_annotations_field(), "type_annotations field must be present"); 2409 method->obj_field_put(type_annotations_offset, value); 2410 } 2411 2412 void java_lang_reflect_Constructor::compute_offsets() { 2413 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2414 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2415 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2416 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2417 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2418 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2419 // The generic signature and annotations fields are only present in 1.5 2420 signature_offset = -1; 2421 annotations_offset = -1; 2422 parameter_annotations_offset = -1; 2423 type_annotations_offset = -1; 2424 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2425 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2426 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2427 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2428 } 2429 2430 Handle java_lang_reflect_Constructor::create(TRAPS) { 2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2432 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2433 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2434 instanceKlassHandle klass (THREAD, k); 2435 // Ensure it is initialized 2436 klass->initialize(CHECK_NH); 2437 return klass->allocate_instance_handle(THREAD); 2438 } 2439 2440 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2441 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2442 return reflect->obj_field(clazz_offset); 2443 } 2444 2445 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2446 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2447 reflect->obj_field_put(clazz_offset, value); 2448 } 2449 2450 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2451 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2452 return constructor->obj_field(parameterTypes_offset); 2453 } 2454 2455 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2456 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2457 constructor->obj_field_put(parameterTypes_offset, value); 2458 } 2459 2460 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2461 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2462 return constructor->obj_field(exceptionTypes_offset); 2463 } 2464 2465 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2467 constructor->obj_field_put(exceptionTypes_offset, value); 2468 } 2469 2470 int java_lang_reflect_Constructor::slot(oop reflect) { 2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2472 return reflect->int_field(slot_offset); 2473 } 2474 2475 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2476 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2477 reflect->int_field_put(slot_offset, value); 2478 } 2479 2480 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2481 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2482 return constructor->int_field(modifiers_offset); 2483 } 2484 2485 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2487 constructor->int_field_put(modifiers_offset, value); 2488 } 2489 2490 bool java_lang_reflect_Constructor::has_signature_field() { 2491 return (signature_offset >= 0); 2492 } 2493 2494 oop java_lang_reflect_Constructor::signature(oop constructor) { 2495 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2496 assert(has_signature_field(), "signature field must be present"); 2497 return constructor->obj_field(signature_offset); 2498 } 2499 2500 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2501 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2502 assert(has_signature_field(), "signature field must be present"); 2503 constructor->obj_field_put(signature_offset, value); 2504 } 2505 2506 bool java_lang_reflect_Constructor::has_annotations_field() { 2507 return (annotations_offset >= 0); 2508 } 2509 2510 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2511 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2512 assert(has_annotations_field(), "annotations field must be present"); 2513 return constructor->obj_field(annotations_offset); 2514 } 2515 2516 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2518 assert(has_annotations_field(), "annotations field must be present"); 2519 constructor->obj_field_put(annotations_offset, value); 2520 } 2521 2522 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2523 return (parameter_annotations_offset >= 0); 2524 } 2525 2526 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2528 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2529 return method->obj_field(parameter_annotations_offset); 2530 } 2531 2532 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2533 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2534 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2535 method->obj_field_put(parameter_annotations_offset, value); 2536 } 2537 2538 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2539 return (type_annotations_offset >= 0); 2540 } 2541 2542 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2543 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2544 assert(has_type_annotations_field(), "type_annotations field must be present"); 2545 return constructor->obj_field(type_annotations_offset); 2546 } 2547 2548 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2549 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2550 assert(has_type_annotations_field(), "type_annotations field must be present"); 2551 constructor->obj_field_put(type_annotations_offset, value); 2552 } 2553 2554 void java_lang_reflect_Field::compute_offsets() { 2555 Klass* k = SystemDictionary::reflect_Field_klass(); 2556 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2557 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2558 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2559 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2560 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2561 // The generic signature and annotations fields are only present in 1.5 2562 signature_offset = -1; 2563 annotations_offset = -1; 2564 type_annotations_offset = -1; 2565 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2566 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2567 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2568 } 2569 2570 Handle java_lang_reflect_Field::create(TRAPS) { 2571 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2572 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2573 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2574 instanceKlassHandle klass (THREAD, k); 2575 // Ensure it is initialized 2576 klass->initialize(CHECK_NH); 2577 return klass->allocate_instance_handle(THREAD); 2578 } 2579 2580 oop java_lang_reflect_Field::clazz(oop reflect) { 2581 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2582 return reflect->obj_field(clazz_offset); 2583 } 2584 2585 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2586 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2587 reflect->obj_field_put(clazz_offset, value); 2588 } 2589 2590 oop java_lang_reflect_Field::name(oop field) { 2591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2592 return field->obj_field(name_offset); 2593 } 2594 2595 void java_lang_reflect_Field::set_name(oop field, oop value) { 2596 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2597 field->obj_field_put(name_offset, value); 2598 } 2599 2600 oop java_lang_reflect_Field::type(oop field) { 2601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2602 return field->obj_field(type_offset); 2603 } 2604 2605 void java_lang_reflect_Field::set_type(oop field, oop value) { 2606 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2607 field->obj_field_put(type_offset, value); 2608 } 2609 2610 int java_lang_reflect_Field::slot(oop reflect) { 2611 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2612 return reflect->int_field(slot_offset); 2613 } 2614 2615 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2616 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2617 reflect->int_field_put(slot_offset, value); 2618 } 2619 2620 int java_lang_reflect_Field::modifiers(oop field) { 2621 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2622 return field->int_field(modifiers_offset); 2623 } 2624 2625 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2626 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2627 field->int_field_put(modifiers_offset, value); 2628 } 2629 2630 bool java_lang_reflect_Field::has_signature_field() { 2631 return (signature_offset >= 0); 2632 } 2633 2634 oop java_lang_reflect_Field::signature(oop field) { 2635 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2636 assert(has_signature_field(), "signature field must be present"); 2637 return field->obj_field(signature_offset); 2638 } 2639 2640 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2642 assert(has_signature_field(), "signature field must be present"); 2643 field->obj_field_put(signature_offset, value); 2644 } 2645 2646 bool java_lang_reflect_Field::has_annotations_field() { 2647 return (annotations_offset >= 0); 2648 } 2649 2650 oop java_lang_reflect_Field::annotations(oop field) { 2651 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2652 assert(has_annotations_field(), "annotations field must be present"); 2653 return field->obj_field(annotations_offset); 2654 } 2655 2656 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2658 assert(has_annotations_field(), "annotations field must be present"); 2659 field->obj_field_put(annotations_offset, value); 2660 } 2661 2662 bool java_lang_reflect_Field::has_type_annotations_field() { 2663 return (type_annotations_offset >= 0); 2664 } 2665 2666 oop java_lang_reflect_Field::type_annotations(oop field) { 2667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2668 assert(has_type_annotations_field(), "type_annotations field must be present"); 2669 return field->obj_field(type_annotations_offset); 2670 } 2671 2672 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2674 assert(has_type_annotations_field(), "type_annotations field must be present"); 2675 field->obj_field_put(type_annotations_offset, value); 2676 } 2677 2678 void sun_reflect_ConstantPool::compute_offsets() { 2679 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2680 // This null test can be removed post beta 2681 if (k != NULL) { 2682 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2683 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2684 } 2685 } 2686 2687 void java_lang_reflect_Parameter::compute_offsets() { 2688 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2689 if(NULL != k) { 2690 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2691 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2692 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2693 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2694 } 2695 } 2696 2697 Handle java_lang_reflect_Parameter::create(TRAPS) { 2698 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2699 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2700 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2701 instanceKlassHandle klass (THREAD, k); 2702 // Ensure it is initialized 2703 klass->initialize(CHECK_NH); 2704 return klass->allocate_instance_handle(THREAD); 2705 } 2706 2707 oop java_lang_reflect_Parameter::name(oop param) { 2708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2709 return param->obj_field(name_offset); 2710 } 2711 2712 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2713 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2714 param->obj_field_put(name_offset, value); 2715 } 2716 2717 int java_lang_reflect_Parameter::modifiers(oop param) { 2718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2719 return param->int_field(modifiers_offset); 2720 } 2721 2722 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2723 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2724 param->int_field_put(modifiers_offset, value); 2725 } 2726 2727 int java_lang_reflect_Parameter::index(oop param) { 2728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2729 return param->int_field(index_offset); 2730 } 2731 2732 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2733 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2734 param->int_field_put(index_offset, value); 2735 } 2736 2737 oop java_lang_reflect_Parameter::executable(oop param) { 2738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2739 return param->obj_field(executable_offset); 2740 } 2741 2742 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2744 param->obj_field_put(executable_offset, value); 2745 } 2746 2747 2748 Handle sun_reflect_ConstantPool::create(TRAPS) { 2749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2750 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2751 instanceKlassHandle klass (THREAD, k); 2752 // Ensure it is initialized 2753 klass->initialize(CHECK_NH); 2754 return klass->allocate_instance_handle(THREAD); 2755 } 2756 2757 2758 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2760 oop mirror = value->pool_holder()->java_mirror(); 2761 // Save the mirror to get back the constant pool. 2762 reflect->obj_field_put(_oop_offset, mirror); 2763 } 2764 2765 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 2768 oop mirror = reflect->obj_field(_oop_offset); 2769 Klass* k = java_lang_Class::as_Klass(mirror); 2770 assert(k->is_instance_klass(), "Must be"); 2771 2772 // Get the constant pool back from the klass. Since class redefinition 2773 // merges the new constant pool into the old, this is essentially the 2774 // same constant pool as the original. If constant pool merging is 2775 // no longer done in the future, this will have to change to save 2776 // the original. 2777 return InstanceKlass::cast(k)->constants(); 2778 } 2779 2780 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2781 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2782 // This null test can be removed post beta 2783 if (k != NULL) { 2784 compute_offset(_base_offset, k, 2785 vmSymbols::base_name(), vmSymbols::object_signature()); 2786 } 2787 } 2788 2789 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2790 Klass* k = SystemDictionary::box_klass(type); 2791 if (k == NULL) return NULL; 2792 instanceKlassHandle h (THREAD, k); 2793 if (!h->is_initialized()) h->initialize(CHECK_0); 2794 return h->allocate_instance(THREAD); 2795 } 2796 2797 2798 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2799 oop box = initialize_and_allocate(type, CHECK_0); 2800 if (box == NULL) return NULL; 2801 switch (type) { 2802 case T_BOOLEAN: 2803 box->bool_field_put(value_offset, value->z); 2804 break; 2805 case T_CHAR: 2806 box->char_field_put(value_offset, value->c); 2807 break; 2808 case T_FLOAT: 2809 box->float_field_put(value_offset, value->f); 2810 break; 2811 case T_DOUBLE: 2812 box->double_field_put(long_value_offset, value->d); 2813 break; 2814 case T_BYTE: 2815 box->byte_field_put(value_offset, value->b); 2816 break; 2817 case T_SHORT: 2818 box->short_field_put(value_offset, value->s); 2819 break; 2820 case T_INT: 2821 box->int_field_put(value_offset, value->i); 2822 break; 2823 case T_LONG: 2824 box->long_field_put(long_value_offset, value->j); 2825 break; 2826 default: 2827 return NULL; 2828 } 2829 return box; 2830 } 2831 2832 2833 BasicType java_lang_boxing_object::basic_type(oop box) { 2834 if (box == NULL) return T_ILLEGAL; 2835 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2836 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2837 return T_ILLEGAL; 2838 return type; 2839 } 2840 2841 2842 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2843 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2844 switch (type) { 2845 case T_BOOLEAN: 2846 value->z = box->bool_field(value_offset); 2847 break; 2848 case T_CHAR: 2849 value->c = box->char_field(value_offset); 2850 break; 2851 case T_FLOAT: 2852 value->f = box->float_field(value_offset); 2853 break; 2854 case T_DOUBLE: 2855 value->d = box->double_field(long_value_offset); 2856 break; 2857 case T_BYTE: 2858 value->b = box->byte_field(value_offset); 2859 break; 2860 case T_SHORT: 2861 value->s = box->short_field(value_offset); 2862 break; 2863 case T_INT: 2864 value->i = box->int_field(value_offset); 2865 break; 2866 case T_LONG: 2867 value->j = box->long_field(long_value_offset); 2868 break; 2869 default: 2870 return T_ILLEGAL; 2871 } // end switch 2872 return type; 2873 } 2874 2875 2876 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2877 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2878 switch (type) { 2879 case T_BOOLEAN: 2880 box->bool_field_put(value_offset, value->z); 2881 break; 2882 case T_CHAR: 2883 box->char_field_put(value_offset, value->c); 2884 break; 2885 case T_FLOAT: 2886 box->float_field_put(value_offset, value->f); 2887 break; 2888 case T_DOUBLE: 2889 box->double_field_put(long_value_offset, value->d); 2890 break; 2891 case T_BYTE: 2892 box->byte_field_put(value_offset, value->b); 2893 break; 2894 case T_SHORT: 2895 box->short_field_put(value_offset, value->s); 2896 break; 2897 case T_INT: 2898 box->int_field_put(value_offset, value->i); 2899 break; 2900 case T_LONG: 2901 box->long_field_put(long_value_offset, value->j); 2902 break; 2903 default: 2904 return T_ILLEGAL; 2905 } // end switch 2906 return type; 2907 } 2908 2909 2910 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2911 switch (type) { 2912 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2913 case T_CHAR: st->print("%d", value->c); break; 2914 case T_BYTE: st->print("%d", value->b); break; 2915 case T_SHORT: st->print("%d", value->s); break; 2916 case T_INT: st->print("%d", value->i); break; 2917 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2918 case T_FLOAT: st->print("%f", value->f); break; 2919 case T_DOUBLE: st->print("%lf", value->d); break; 2920 default: st->print("type %d?", type); break; 2921 } 2922 } 2923 2924 2925 // Support for java_lang_ref_Reference 2926 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2927 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2928 address addr = ik->static_field_addr(static_lock_offset); 2929 return (HeapWord*) addr; 2930 } 2931 2932 oop java_lang_ref_Reference::pending_list_lock() { 2933 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2934 address addr = ik->static_field_addr(static_lock_offset); 2935 if (UseCompressedOops) { 2936 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2937 } else { 2938 return oopDesc::load_decode_heap_oop((oop*)addr); 2939 } 2940 } 2941 2942 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2943 InstanceKlass* ik = SystemDictionary::Reference_klass(); 2944 address addr = ik->static_field_addr(static_pending_offset); 2945 // XXX This might not be HeapWord aligned, almost rather be char *. 2946 return (HeapWord*)addr; 2947 } 2948 2949 oop java_lang_ref_Reference::pending_list() { 2950 char *addr = (char *)pending_list_addr(); 2951 if (UseCompressedOops) { 2952 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2953 } else { 2954 return oopDesc::load_decode_heap_oop((oop*)addr); 2955 } 2956 } 2957 2958 2959 // Support for java_lang_ref_SoftReference 2960 2961 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2962 return ref->long_field(timestamp_offset); 2963 } 2964 2965 jlong java_lang_ref_SoftReference::clock() { 2966 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2967 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2968 return *offset; 2969 } 2970 2971 void java_lang_ref_SoftReference::set_clock(jlong value) { 2972 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 2973 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2974 *offset = value; 2975 } 2976 2977 // Support for java_lang_invoke_DirectMethodHandle 2978 2979 int java_lang_invoke_DirectMethodHandle::_member_offset; 2980 2981 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2982 oop member_name = NULL; 2983 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2984 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2985 if (is_dmh) { 2986 member_name = dmh->obj_field(member_offset_in_bytes()); 2987 } 2988 return member_name; 2989 } 2990 2991 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2992 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2993 if (klass_oop != NULL) { 2994 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2995 } 2996 } 2997 2998 // Support for java_lang_invoke_MethodHandle 2999 3000 int java_lang_invoke_MethodHandle::_type_offset; 3001 int java_lang_invoke_MethodHandle::_form_offset; 3002 3003 int java_lang_invoke_MemberName::_clazz_offset; 3004 int java_lang_invoke_MemberName::_name_offset; 3005 int java_lang_invoke_MemberName::_type_offset; 3006 int java_lang_invoke_MemberName::_flags_offset; 3007 int java_lang_invoke_MemberName::_vmtarget_offset; 3008 int java_lang_invoke_MemberName::_vmloader_offset; 3009 int java_lang_invoke_MemberName::_vmindex_offset; 3010 3011 int java_lang_invoke_LambdaForm::_vmentry_offset; 3012 3013 void java_lang_invoke_MethodHandle::compute_offsets() { 3014 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3015 if (klass_oop != NULL) { 3016 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3017 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3018 } 3019 } 3020 3021 void java_lang_invoke_MemberName::compute_offsets() { 3022 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3023 if (klass_oop != NULL) { 3024 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3025 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3026 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3027 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3028 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3029 } 3030 } 3031 3032 void java_lang_invoke_LambdaForm::compute_offsets() { 3033 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3034 if (klass_oop != NULL) { 3035 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3036 } 3037 } 3038 3039 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3040 return obj != NULL && is_subclass(obj->klass()); 3041 } 3042 3043 3044 oop java_lang_invoke_MethodHandle::type(oop mh) { 3045 return mh->obj_field(_type_offset); 3046 } 3047 3048 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3049 mh->obj_field_put(_type_offset, mtype); 3050 } 3051 3052 oop java_lang_invoke_MethodHandle::form(oop mh) { 3053 assert(_form_offset != 0, ""); 3054 return mh->obj_field(_form_offset); 3055 } 3056 3057 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3058 assert(_form_offset != 0, ""); 3059 mh->obj_field_put(_form_offset, lform); 3060 } 3061 3062 /// MemberName accessors 3063 3064 oop java_lang_invoke_MemberName::clazz(oop mname) { 3065 assert(is_instance(mname), "wrong type"); 3066 return mname->obj_field(_clazz_offset); 3067 } 3068 3069 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3070 assert(is_instance(mname), "wrong type"); 3071 mname->obj_field_put(_clazz_offset, clazz); 3072 } 3073 3074 oop java_lang_invoke_MemberName::name(oop mname) { 3075 assert(is_instance(mname), "wrong type"); 3076 return mname->obj_field(_name_offset); 3077 } 3078 3079 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3080 assert(is_instance(mname), "wrong type"); 3081 mname->obj_field_put(_name_offset, name); 3082 } 3083 3084 oop java_lang_invoke_MemberName::type(oop mname) { 3085 assert(is_instance(mname), "wrong type"); 3086 return mname->obj_field(_type_offset); 3087 } 3088 3089 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3090 assert(is_instance(mname), "wrong type"); 3091 mname->obj_field_put(_type_offset, type); 3092 } 3093 3094 int java_lang_invoke_MemberName::flags(oop mname) { 3095 assert(is_instance(mname), "wrong type"); 3096 return mname->int_field(_flags_offset); 3097 } 3098 3099 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3100 assert(is_instance(mname), "wrong type"); 3101 mname->int_field_put(_flags_offset, flags); 3102 } 3103 3104 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3105 assert(is_instance(mname), "wrong type"); 3106 return (Metadata*)mname->address_field(_vmtarget_offset); 3107 } 3108 3109 bool java_lang_invoke_MemberName::is_method(oop mname) { 3110 assert(is_instance(mname), "must be MemberName"); 3111 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3112 } 3113 3114 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3115 assert(is_instance(mname), "wrong type"); 3116 // check the type of the vmtarget 3117 oop dependency = NULL; 3118 if (ref != NULL) { 3119 switch (flags(mname) & (MN_IS_METHOD | 3120 MN_IS_CONSTRUCTOR | 3121 MN_IS_FIELD)) { 3122 case MN_IS_METHOD: 3123 case MN_IS_CONSTRUCTOR: 3124 assert(ref->is_method(), "should be a method"); 3125 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3126 break; 3127 case MN_IS_FIELD: 3128 assert(ref->is_klass(), "should be a class"); 3129 dependency = ((Klass*)ref)->java_mirror(); 3130 break; 3131 default: 3132 ShouldNotReachHere(); 3133 } 3134 } 3135 mname->address_field_put(_vmtarget_offset, (address)ref); 3136 // Add a reference to the loader (actually mirror because anonymous classes will not have 3137 // distinct loaders) to ensure the metadata is kept alive 3138 // This mirror may be different than the one in clazz field. 3139 mname->obj_field_put(_vmloader_offset, dependency); 3140 } 3141 3142 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3143 assert(is_instance(mname), "wrong type"); 3144 return (intptr_t) mname->address_field(_vmindex_offset); 3145 } 3146 3147 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3148 assert(is_instance(mname), "wrong type"); 3149 mname->address_field_put(_vmindex_offset, (address) index); 3150 } 3151 3152 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3153 assert(is_instance(lform), "wrong type"); 3154 return lform->obj_field(_vmentry_offset); 3155 } 3156 3157 3158 // Support for java_lang_invoke_MethodType 3159 3160 int java_lang_invoke_MethodType::_rtype_offset; 3161 int java_lang_invoke_MethodType::_ptypes_offset; 3162 3163 void java_lang_invoke_MethodType::compute_offsets() { 3164 Klass* k = SystemDictionary::MethodType_klass(); 3165 if (k != NULL) { 3166 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3167 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3168 } 3169 } 3170 3171 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3172 st->print("("); 3173 objArrayOop pts = ptypes(mt); 3174 for (int i = 0, limit = pts->length(); i < limit; i++) { 3175 java_lang_Class::print_signature(pts->obj_at(i), st); 3176 } 3177 st->print(")"); 3178 java_lang_Class::print_signature(rtype(mt), st); 3179 } 3180 3181 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3182 ResourceMark rm; 3183 stringStream buffer(128); 3184 print_signature(mt, &buffer); 3185 const char* sigstr = buffer.base(); 3186 int siglen = (int) buffer.size(); 3187 Symbol *name; 3188 if (!intern_if_not_found) { 3189 name = SymbolTable::probe(sigstr, siglen); 3190 } else { 3191 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3192 } 3193 return name; 3194 } 3195 3196 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3197 if (mt1 == mt2) 3198 return true; 3199 if (rtype(mt1) != rtype(mt2)) 3200 return false; 3201 if (ptype_count(mt1) != ptype_count(mt2)) 3202 return false; 3203 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3204 if (ptype(mt1, i) != ptype(mt2, i)) 3205 return false; 3206 } 3207 return true; 3208 } 3209 3210 oop java_lang_invoke_MethodType::rtype(oop mt) { 3211 assert(is_instance(mt), "must be a MethodType"); 3212 return mt->obj_field(_rtype_offset); 3213 } 3214 3215 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3216 assert(is_instance(mt), "must be a MethodType"); 3217 return (objArrayOop) mt->obj_field(_ptypes_offset); 3218 } 3219 3220 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3221 return ptypes(mt)->obj_at(idx); 3222 } 3223 3224 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3225 return ptypes(mt)->length(); 3226 } 3227 3228 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3229 objArrayOop pts = ptypes(mt); 3230 int count = pts->length(); 3231 int slots = 0; 3232 for (int i = 0; i < count; i++) { 3233 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3234 slots += type2size[bt]; 3235 } 3236 return slots; 3237 } 3238 3239 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3240 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3241 return type2size[bt]; 3242 } 3243 3244 3245 // Support for java_lang_invoke_CallSite 3246 3247 int java_lang_invoke_CallSite::_target_offset; 3248 int java_lang_invoke_CallSite::_context_offset; 3249 3250 void java_lang_invoke_CallSite::compute_offsets() { 3251 Klass* k = SystemDictionary::CallSite_klass(); 3252 if (k != NULL) { 3253 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3254 compute_offset(_context_offset, k, vmSymbols::context_name(), 3255 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3256 } 3257 } 3258 3259 oop java_lang_invoke_CallSite::context(oop call_site) { 3260 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3261 3262 oop dep_oop = call_site->obj_field(_context_offset); 3263 return dep_oop; 3264 } 3265 3266 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3267 3268 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3269 3270 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3271 Klass* k = SystemDictionary::Context_klass(); 3272 if (k != NULL) { 3273 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3274 } 3275 } 3276 3277 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3278 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3279 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3280 } 3281 3282 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3283 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3284 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3285 } 3286 3287 // Support for java_security_AccessControlContext 3288 3289 int java_security_AccessControlContext::_context_offset = 0; 3290 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3291 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3292 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3293 3294 void java_security_AccessControlContext::compute_offsets() { 3295 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3296 fieldDescriptor fd; 3297 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3298 3299 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3300 fatal("Invalid layout of java.security.AccessControlContext"); 3301 } 3302 _context_offset = fd.offset(); 3303 3304 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3305 fatal("Invalid layout of java.security.AccessControlContext"); 3306 } 3307 _privilegedContext_offset = fd.offset(); 3308 3309 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3310 fatal("Invalid layout of java.security.AccessControlContext"); 3311 } 3312 _isPrivileged_offset = fd.offset(); 3313 3314 // The offset may not be present for bootstrapping with older JDK. 3315 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3316 _isAuthorized_offset = fd.offset(); 3317 } 3318 } 3319 3320 3321 bool java_security_AccessControlContext::is_authorized(Handle context) { 3322 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3323 assert(_isAuthorized_offset != -1, "should be set"); 3324 return context->bool_field(_isAuthorized_offset) != 0; 3325 } 3326 3327 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3328 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3329 // Ensure klass is initialized 3330 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3331 // Allocate result 3332 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3333 // Fill in values 3334 result->obj_field_put(_context_offset, context()); 3335 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3336 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3337 // whitelist AccessControlContexts created by the JVM if present 3338 if (_isAuthorized_offset != -1) { 3339 result->bool_field_put(_isAuthorized_offset, true); 3340 } 3341 return result; 3342 } 3343 3344 3345 // Support for java_lang_ClassLoader 3346 3347 bool java_lang_ClassLoader::offsets_computed = false; 3348 int java_lang_ClassLoader::_loader_data_offset = -1; 3349 int java_lang_ClassLoader::parallelCapable_offset = -1; 3350 3351 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3352 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3353 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3354 } 3355 3356 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3357 return *java_lang_ClassLoader::loader_data_addr(loader); 3358 } 3359 3360 void java_lang_ClassLoader::compute_offsets() { 3361 assert(!offsets_computed, "offsets should be initialized only once"); 3362 offsets_computed = true; 3363 3364 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3365 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3366 compute_optional_offset(parallelCapable_offset, 3367 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3368 3369 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3370 } 3371 3372 oop java_lang_ClassLoader::parent(oop loader) { 3373 assert(is_instance(loader), "loader must be oop"); 3374 return loader->obj_field(parent_offset); 3375 } 3376 3377 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3378 assert(is_instance(loader), "loader must be oop"); 3379 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3380 oop acl = loader; 3381 debug_only(jint loop_count = 0); 3382 // This loop taken verbatim from ClassLoader.java: 3383 do { 3384 acl = parent(acl); 3385 if (cl == acl) { 3386 return true; 3387 } 3388 assert(++loop_count > 0, "loop_count overflow"); 3389 } while (acl != NULL); 3390 return false; 3391 } 3392 3393 bool java_lang_ClassLoader::is_instance(oop obj) { 3394 return obj != NULL && is_subclass(obj->klass()); 3395 } 3396 3397 3398 // For class loader classes, parallelCapable defined 3399 // based on non-null field 3400 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3401 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3402 if (parallelCapable_offset == -1) { 3403 // Default for backward compatibility is false 3404 return false; 3405 } 3406 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3407 } 3408 3409 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3410 // Fix for 4474172; see evaluation for more details 3411 loader = non_reflection_class_loader(loader); 3412 3413 oop cl = SystemDictionary::java_system_loader(); 3414 while(cl != NULL) { 3415 if (cl == loader) return true; 3416 cl = parent(cl); 3417 } 3418 return false; 3419 } 3420 3421 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3422 if (loader != NULL) { 3423 // See whether this is one of the class loaders associated with 3424 // the generated bytecodes for reflection, and if so, "magically" 3425 // delegate to its parent to prevent class loading from occurring 3426 // in places where applications using reflection didn't expect it. 3427 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3428 // This might be null in non-1.4 JDKs 3429 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3430 return parent(loader); 3431 } 3432 } 3433 return loader; 3434 } 3435 3436 3437 // Support for java_lang_System 3438 int java_lang_System::in_offset_in_bytes() { 3439 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3440 } 3441 3442 3443 int java_lang_System::out_offset_in_bytes() { 3444 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3445 } 3446 3447 3448 int java_lang_System::err_offset_in_bytes() { 3449 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3450 } 3451 3452 3453 bool java_lang_System::has_security_manager() { 3454 InstanceKlass* ik = SystemDictionary::System_klass(); 3455 address addr = ik->static_field_addr(static_security_offset); 3456 if (UseCompressedOops) { 3457 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3458 } else { 3459 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3460 } 3461 } 3462 3463 int java_lang_Class::_klass_offset; 3464 int java_lang_Class::_array_klass_offset; 3465 int java_lang_Class::_oop_size_offset; 3466 int java_lang_Class::_static_oop_field_count_offset; 3467 int java_lang_Class::_class_loader_offset; 3468 int java_lang_Class::_protection_domain_offset; 3469 int java_lang_Class::_component_mirror_offset; 3470 int java_lang_Class::_init_lock_offset; 3471 int java_lang_Class::_signers_offset; 3472 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3473 int java_lang_Throwable::backtrace_offset; 3474 int java_lang_Throwable::detailMessage_offset; 3475 int java_lang_Throwable::cause_offset; 3476 int java_lang_Throwable::stackTrace_offset; 3477 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3478 int java_lang_reflect_AccessibleObject::override_offset; 3479 int java_lang_reflect_Method::clazz_offset; 3480 int java_lang_reflect_Method::name_offset; 3481 int java_lang_reflect_Method::returnType_offset; 3482 int java_lang_reflect_Method::parameterTypes_offset; 3483 int java_lang_reflect_Method::exceptionTypes_offset; 3484 int java_lang_reflect_Method::slot_offset; 3485 int java_lang_reflect_Method::modifiers_offset; 3486 int java_lang_reflect_Method::signature_offset; 3487 int java_lang_reflect_Method::annotations_offset; 3488 int java_lang_reflect_Method::parameter_annotations_offset; 3489 int java_lang_reflect_Method::annotation_default_offset; 3490 int java_lang_reflect_Method::type_annotations_offset; 3491 int java_lang_reflect_Constructor::clazz_offset; 3492 int java_lang_reflect_Constructor::parameterTypes_offset; 3493 int java_lang_reflect_Constructor::exceptionTypes_offset; 3494 int java_lang_reflect_Constructor::slot_offset; 3495 int java_lang_reflect_Constructor::modifiers_offset; 3496 int java_lang_reflect_Constructor::signature_offset; 3497 int java_lang_reflect_Constructor::annotations_offset; 3498 int java_lang_reflect_Constructor::parameter_annotations_offset; 3499 int java_lang_reflect_Constructor::type_annotations_offset; 3500 int java_lang_reflect_Field::clazz_offset; 3501 int java_lang_reflect_Field::name_offset; 3502 int java_lang_reflect_Field::type_offset; 3503 int java_lang_reflect_Field::slot_offset; 3504 int java_lang_reflect_Field::modifiers_offset; 3505 int java_lang_reflect_Field::signature_offset; 3506 int java_lang_reflect_Field::annotations_offset; 3507 int java_lang_reflect_Field::type_annotations_offset; 3508 int java_lang_reflect_Parameter::name_offset; 3509 int java_lang_reflect_Parameter::modifiers_offset; 3510 int java_lang_reflect_Parameter::index_offset; 3511 int java_lang_reflect_Parameter::executable_offset; 3512 int java_lang_boxing_object::value_offset; 3513 int java_lang_boxing_object::long_value_offset; 3514 int java_lang_ref_Reference::referent_offset; 3515 int java_lang_ref_Reference::queue_offset; 3516 int java_lang_ref_Reference::next_offset; 3517 int java_lang_ref_Reference::discovered_offset; 3518 int java_lang_ref_Reference::static_lock_offset; 3519 int java_lang_ref_Reference::static_pending_offset; 3520 int java_lang_ref_Reference::number_of_fake_oop_fields; 3521 int java_lang_ref_SoftReference::timestamp_offset; 3522 int java_lang_ref_SoftReference::static_clock_offset; 3523 int java_lang_ClassLoader::parent_offset; 3524 int java_lang_System::static_in_offset; 3525 int java_lang_System::static_out_offset; 3526 int java_lang_System::static_err_offset; 3527 int java_lang_System::static_security_offset; 3528 int java_lang_StackTraceElement::declaringClass_offset; 3529 int java_lang_StackTraceElement::methodName_offset; 3530 int java_lang_StackTraceElement::fileName_offset; 3531 int java_lang_StackTraceElement::lineNumber_offset; 3532 int java_lang_StackFrameInfo::_declaringClass_offset; 3533 int java_lang_StackFrameInfo::_memberName_offset; 3534 int java_lang_StackFrameInfo::_bci_offset; 3535 int java_lang_StackFrameInfo::_methodName_offset; 3536 int java_lang_StackFrameInfo::_fileName_offset; 3537 int java_lang_StackFrameInfo::_lineNumber_offset; 3538 int java_lang_StackFrameInfo::_mid_offset; 3539 int java_lang_StackFrameInfo::_version_offset; 3540 int java_lang_StackFrameInfo::_cpref_offset; 3541 int java_lang_LiveStackFrameInfo::_monitors_offset; 3542 int java_lang_LiveStackFrameInfo::_locals_offset; 3543 int java_lang_LiveStackFrameInfo::_operands_offset; 3544 int java_lang_AssertionStatusDirectives::classes_offset; 3545 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3546 int java_lang_AssertionStatusDirectives::packages_offset; 3547 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3548 int java_lang_AssertionStatusDirectives::deflt_offset; 3549 int java_nio_Buffer::_limit_offset; 3550 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3551 int sun_reflect_ConstantPool::_oop_offset; 3552 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3553 3554 3555 // Support for java_lang_StackTraceElement 3556 3557 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3558 element->obj_field_put(fileName_offset, value); 3559 } 3560 3561 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3562 element->obj_field_put(declaringClass_offset, value); 3563 } 3564 3565 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3566 element->obj_field_put(methodName_offset, value); 3567 } 3568 3569 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3570 element->int_field_put(lineNumber_offset, value); 3571 } 3572 3573 // Support for java_lang_StackFrameInfo 3574 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3575 element->obj_field_put(_declaringClass_offset, value); 3576 } 3577 3578 void java_lang_StackFrameInfo::set_mid(oop element, short value) { 3579 element->short_field_put(_mid_offset, value); 3580 } 3581 3582 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3583 element->short_field_put(_version_offset, value); 3584 } 3585 3586 void java_lang_StackFrameInfo::set_cpref(oop element, short value) { 3587 element->short_field_put(_cpref_offset, value); 3588 } 3589 3590 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3591 element->int_field_put(_bci_offset, value); 3592 } 3593 3594 void java_lang_StackFrameInfo::set_fileName(oop element, oop value) { 3595 element->obj_field_put(_fileName_offset, value); 3596 } 3597 3598 void java_lang_StackFrameInfo::set_methodName(oop element, oop value) { 3599 element->obj_field_put(_methodName_offset, value); 3600 } 3601 3602 void java_lang_StackFrameInfo::set_lineNumber(oop element, int value) { 3603 element->int_field_put(_lineNumber_offset, value); 3604 } 3605 3606 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3607 element->obj_field_put(_monitors_offset, value); 3608 } 3609 3610 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3611 element->obj_field_put(_locals_offset, value); 3612 } 3613 3614 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3615 element->obj_field_put(_operands_offset, value); 3616 } 3617 3618 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3619 3620 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3621 o->obj_field_put(classes_offset, val); 3622 } 3623 3624 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3625 o->obj_field_put(classEnabled_offset, val); 3626 } 3627 3628 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3629 o->obj_field_put(packages_offset, val); 3630 } 3631 3632 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3633 o->obj_field_put(packageEnabled_offset, val); 3634 } 3635 3636 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3637 o->bool_field_put(deflt_offset, val); 3638 } 3639 3640 3641 // Support for intrinsification of java.nio.Buffer.checkIndex 3642 int java_nio_Buffer::limit_offset() { 3643 return _limit_offset; 3644 } 3645 3646 3647 void java_nio_Buffer::compute_offsets() { 3648 Klass* k = SystemDictionary::nio_Buffer_klass(); 3649 assert(k != NULL, "must be loaded in 1.4+"); 3650 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3651 } 3652 3653 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3654 if (_owner_offset != 0) return; 3655 3656 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3657 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3658 compute_offset(_owner_offset, k, 3659 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3660 } 3661 3662 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3663 assert(_owner_offset != 0, "Must be initialized"); 3664 return obj->obj_field(_owner_offset); 3665 } 3666 3667 // Compute hard-coded offsets 3668 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3669 // are not available to determine the offset_of_static_fields. 3670 void JavaClasses::compute_hard_coded_offsets() { 3671 const int x = heapOopSize; 3672 const int header = instanceOopDesc::base_offset_in_bytes(); 3673 3674 // Throwable Class 3675 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3676 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3677 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3678 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3679 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3680 3681 // java_lang_boxing_object 3682 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3683 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3684 3685 // java_lang_ref_Reference: 3686 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3687 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3688 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3689 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3690 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3691 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3692 // Artificial fields for java_lang_ref_Reference 3693 // The first field is for the discovered field added in 1.4 3694 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3695 3696 // java_lang_ref_SoftReference Class 3697 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3698 // Don't multiply static fields because they are always in wordSize units 3699 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3700 3701 // java_lang_ClassLoader 3702 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3703 3704 // java_lang_System 3705 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3706 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3707 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3708 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3709 3710 // java_lang_StackTraceElement 3711 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3712 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3713 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3714 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3715 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3716 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3717 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3718 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3719 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3720 3721 } 3722 3723 3724 // Compute non-hard-coded field offsets of all the classes in this file 3725 void JavaClasses::compute_offsets() { 3726 // java_lang_Class::compute_offsets was called earlier in bootstrap 3727 java_lang_ClassLoader::compute_offsets(); 3728 java_lang_Thread::compute_offsets(); 3729 java_lang_ThreadGroup::compute_offsets(); 3730 java_lang_invoke_MethodHandle::compute_offsets(); 3731 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3732 java_lang_invoke_MemberName::compute_offsets(); 3733 java_lang_invoke_LambdaForm::compute_offsets(); 3734 java_lang_invoke_MethodType::compute_offsets(); 3735 java_lang_invoke_CallSite::compute_offsets(); 3736 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3737 java_security_AccessControlContext::compute_offsets(); 3738 // Initialize reflection classes. The layouts of these classes 3739 // changed with the new reflection implementation in JDK 1.4, and 3740 // since the Universe doesn't know what JDK version it is until this 3741 // point we defer computation of these offsets until now. 3742 java_lang_reflect_AccessibleObject::compute_offsets(); 3743 java_lang_reflect_Method::compute_offsets(); 3744 java_lang_reflect_Constructor::compute_offsets(); 3745 java_lang_reflect_Field::compute_offsets(); 3746 java_nio_Buffer::compute_offsets(); 3747 sun_reflect_ConstantPool::compute_offsets(); 3748 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3749 java_lang_reflect_Parameter::compute_offsets(); 3750 java_lang_StackFrameInfo::compute_offsets(); 3751 java_lang_LiveStackFrameInfo::compute_offsets(); 3752 3753 // generated interpreter code wants to know about the offsets we just computed: 3754 AbstractAssembler::update_delayed_values(); 3755 } 3756 3757 #ifndef PRODUCT 3758 3759 // These functions exist to assert the validity of hard-coded field offsets to guard 3760 // against changes in the class files 3761 3762 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3763 EXCEPTION_MARK; 3764 fieldDescriptor fd; 3765 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3766 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3767 instanceKlassHandle h_klass (THREAD, k); 3768 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3769 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3770 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3771 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3772 return false; 3773 } 3774 if (fd.is_static()) { 3775 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3776 return false; 3777 } 3778 if (fd.offset() == hardcoded_offset ) { 3779 return true; 3780 } else { 3781 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3782 klass_name, field_name, hardcoded_offset, fd.offset()); 3783 return false; 3784 } 3785 } 3786 3787 3788 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3789 EXCEPTION_MARK; 3790 fieldDescriptor fd; 3791 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3792 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3793 instanceKlassHandle h_klass (THREAD, k); 3794 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3795 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3796 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3797 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3798 return false; 3799 } 3800 if (!fd.is_static()) { 3801 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3802 return false; 3803 } 3804 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3805 return true; 3806 } else { 3807 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()); 3808 return false; 3809 } 3810 } 3811 3812 3813 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3814 EXCEPTION_MARK; 3815 fieldDescriptor fd; 3816 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3817 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3818 instanceKlassHandle h_klass (THREAD, k); 3819 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3820 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3821 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3822 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3823 return false; 3824 } 3825 if (!fd.is_static() || !fd.has_initial_value()) { 3826 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3827 return false; 3828 } 3829 if (!fd.initial_value_tag().is_int()) { 3830 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3831 return false; 3832 } 3833 jint field_value = fd.int_initial_value(); 3834 if (field_value == hardcoded_constant) { 3835 return true; 3836 } else { 3837 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); 3838 return false; 3839 } 3840 } 3841 3842 3843 // Check the hard-coded field offsets of all the classes in this file 3844 3845 void JavaClasses::check_offsets() { 3846 bool valid = true; 3847 HandleMark hm; 3848 3849 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3850 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3851 3852 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3853 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3854 3855 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3856 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3857 3858 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3859 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3860 3861 // java.lang.String 3862 3863 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3864 if (java_lang_String::has_hash_field()) { 3865 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3866 } 3867 if (java_lang_String::has_coder_field()) { 3868 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3869 } 3870 3871 // java.lang.Class 3872 3873 // Fake fields 3874 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3875 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3876 3877 // java.lang.Throwable 3878 3879 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3880 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3881 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3882 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3883 3884 // Boxed primitive objects (java_lang_boxing_object) 3885 3886 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3887 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3888 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3889 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3890 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3891 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3892 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3893 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3894 3895 // java.lang.ClassLoader 3896 3897 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3898 3899 // java.lang.System 3900 3901 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3902 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3903 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3904 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3905 3906 // java.lang.StackTraceElement 3907 3908 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3909 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3910 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3911 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3912 3913 // java.lang.ref.Reference 3914 3915 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3916 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3917 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3918 // Fake field 3919 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3920 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3921 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3922 3923 // java.lang.ref.SoftReference 3924 3925 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3926 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3927 3928 // java.lang.AssertionStatusDirectives 3929 // 3930 // The CheckAssertionStatusDirectives boolean can be removed from here and 3931 // globals.hpp after the AssertionStatusDirectives class has been integrated 3932 // into merlin "for some time." Without it, the vm will fail with early 3933 // merlin builds. 3934 3935 if (CheckAssertionStatusDirectives) { 3936 const char* nm = "java/lang/AssertionStatusDirectives"; 3937 const char* sig = "[Ljava/lang/String;"; 3938 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3939 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3940 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3941 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3942 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3943 } 3944 3945 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3946 } 3947 3948 #endif // PRODUCT 3949 3950 int InjectedField::compute_offset() { 3951 InstanceKlass* ik = InstanceKlass::cast(klass()); 3952 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3953 if (!may_be_java && !fs.access_flags().is_internal()) { 3954 // Only look at injected fields 3955 continue; 3956 } 3957 if (fs.name() == name() && fs.signature() == signature()) { 3958 return fs.offset(); 3959 } 3960 } 3961 ResourceMark rm; 3962 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)" : ""); 3963 #ifndef PRODUCT 3964 ik->print(); 3965 tty->print_cr("all fields:"); 3966 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 3967 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3968 } 3969 #endif //PRODUCT 3970 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3971 return -1; 3972 } 3973 3974 void javaClasses_init() { 3975 JavaClasses::compute_offsets(); 3976 JavaClasses::check_offsets(); 3977 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3978 }