1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.inline.hpp" 39 #include "oops/fieldStreams.hpp" 40 #include "oops/instanceKlass.hpp" 41 #include "oops/instanceMirrorKlass.hpp" 42 #include "oops/klass.hpp" 43 #include "oops/method.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/symbol.hpp" 47 #include "oops/typeArrayOop.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/safepoint.hpp" 54 #include "runtime/thread.inline.hpp" 55 #include "runtime/vframe.hpp" 56 #include "utilities/preserveException.hpp" 57 58 #if INCLUDE_JVMCI 59 #include "jvmci/jvmciJavaClasses.hpp" 60 #endif 61 62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 64 65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 67 68 InjectedField JavaClasses::_injected_fields[] = { 69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 70 }; 71 72 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 73 return _injected_fields[id].compute_offset(); 74 } 75 76 77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 78 *field_count = 0; 79 80 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 81 if (sid == vmSymbols::NO_SID) { 82 // Only well known classes can inject fields 83 return NULL; 84 } 85 86 int count = 0; 87 int start = -1; 88 89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 91 count++; \ 92 if (start == -1) start = klass##_##name##_enum; \ 93 } 94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 95 #undef LOOKUP_INJECTED_FIELD 96 97 if (start != -1) { 98 *field_count = count; 99 return _injected_fields + start; 100 } 101 return NULL; 102 } 103 104 105 static bool find_field(InstanceKlass* ik, 106 Symbol* name_symbol, Symbol* signature_symbol, 107 fieldDescriptor* fd, 108 bool is_static = false, bool allow_super = false) { 109 if (allow_super || is_static) { 110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 111 } else { 112 return ik->find_local_field(name_symbol, signature_symbol, fd); 113 } 114 } 115 116 // Helpful routine for computing field offsets at run time rather than hardcoding them 117 static void 118 compute_offset(int &dest_offset, 119 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 120 bool is_static = false, bool allow_super = false) { 121 fieldDescriptor fd; 122 InstanceKlass* ik = InstanceKlass::cast(klass); 123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 124 ResourceMark rm; 125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 126 #ifndef PRODUCT 127 ik->print(); 128 tty->print_cr("all fields:"); 129 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 131 } 132 #endif //PRODUCT 133 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 134 } 135 dest_offset = fd.offset(); 136 } 137 138 // Same as above but for "optional" offsets that might not be present in certain JDK versions 139 static void 140 compute_optional_offset(int& dest_offset, 141 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 142 bool allow_super = false) { 143 fieldDescriptor fd; 144 InstanceKlass* ik = InstanceKlass::cast(klass); 145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 146 dest_offset = fd.offset(); 147 } 148 } 149 150 151 int java_lang_String::value_offset = 0; 152 int java_lang_String::hash_offset = 0; 153 int java_lang_String::coder_offset = 0; 154 155 bool java_lang_String::initialized = false; 156 157 bool java_lang_String::is_instance(oop obj) { 158 return is_instance_inlined(obj); 159 } 160 161 void java_lang_String::compute_offsets() { 162 assert(!initialized, "offsets should be initialized only once"); 163 164 Klass* k = SystemDictionary::String_klass(); 165 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 166 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 167 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 168 169 initialized = true; 170 } 171 172 class CompactStringsFixup : public FieldClosure { 173 private: 174 bool _value; 175 176 public: 177 CompactStringsFixup(bool value) : _value(value) {} 178 179 void do_field(fieldDescriptor* fd) { 180 if (fd->name() == vmSymbols::compact_strings_name()) { 181 oop mirror = fd->field_holder()->java_mirror(); 182 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 183 assert(mirror != NULL, "String must have mirror already"); 184 mirror->bool_field_put(fd->offset(), _value); 185 } 186 } 187 }; 188 189 void java_lang_String::set_compact_strings(bool value) { 190 CompactStringsFixup fix(value); 191 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 192 } 193 194 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 195 assert(initialized, "Must be initialized"); 196 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 197 198 // Create the String object first, so there's a chance that the String 199 // and the char array it points to end up in the same cache line. 200 oop obj; 201 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 202 203 // Create the char array. The String object must be handlized here 204 // because GC can happen as a result of the allocation attempt. 205 Handle h_obj(THREAD, obj); 206 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 207 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 208 209 // Point the String at the char array 210 obj = h_obj(); 211 set_value(obj, buffer); 212 // No need to zero the offset, allocation zero'ed the entire String object 213 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 214 return h_obj; 215 } 216 217 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 218 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 219 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 220 typeArrayOop buffer = value(h_obj()); 221 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 222 if (is_latin1) { 223 for (int index = 0; index < length; index++) { 224 buffer->byte_at_put(index, (jbyte)unicode[index]); 225 } 226 } else { 227 for (int index = 0; index < length; index++) { 228 buffer->char_at_put(index, unicode[index]); 229 } 230 } 231 232 #ifdef ASSERT 233 { 234 ResourceMark rm; 235 char* expected = UNICODE::as_utf8(unicode, length); 236 char* actual = as_utf8_string(h_obj()); 237 if (strcmp(expected, actual) != 0) { 238 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 239 ShouldNotReachHere(); 240 } 241 } 242 #endif 243 244 return h_obj; 245 } 246 247 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 248 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 249 return h_obj(); 250 } 251 252 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 253 if (utf8_str == NULL) { 254 return Handle(); 255 } 256 bool has_multibyte, is_latin1; 257 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 258 if (!CompactStrings) { 259 has_multibyte = true; 260 is_latin1 = false; 261 } 262 263 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 264 if (length > 0) { 265 if (!has_multibyte) { 266 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 267 } else if (is_latin1) { 268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 269 } else { 270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 271 } 272 } 273 274 #ifdef ASSERT 275 // This check is too strict because the input string is not necessarily valid UTF8. 276 // For example, it may be created with arbitrary content via jni_NewStringUTF. 277 /* 278 { 279 ResourceMark rm; 280 const char* expected = utf8_str; 281 char* actual = as_utf8_string(h_obj()); 282 if (strcmp(expected, actual) != 0) { 283 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 284 ShouldNotReachHere(); 285 } 286 } 287 */ 288 #endif 289 290 return h_obj; 291 } 292 293 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 294 Handle h_obj = create_from_str(utf8_str, CHECK_0); 295 return h_obj(); 296 } 297 298 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 299 const char* utf8_str = (char*)symbol->bytes(); 300 int utf8_len = symbol->utf8_length(); 301 302 bool has_multibyte, is_latin1; 303 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 304 if (!CompactStrings) { 305 has_multibyte = true; 306 is_latin1 = false; 307 } 308 309 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 310 if (length > 0) { 311 if (!has_multibyte) { 312 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 313 } else if (is_latin1) { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 315 } else { 316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 317 } 318 } 319 320 #ifdef ASSERT 321 { 322 ResourceMark rm; 323 const char* expected = symbol->as_utf8(); 324 char* actual = as_utf8_string(h_obj()); 325 if (strncmp(expected, actual, utf8_len) != 0) { 326 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 327 ShouldNotReachHere(); 328 } 329 } 330 #endif 331 332 return h_obj; 333 } 334 335 // Converts a C string to a Java String based on current encoding 336 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 337 assert(str != NULL, "bad arguments"); 338 339 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 340 static to_java_string_fn_t _to_java_string_fn = NULL; 341 342 if (_to_java_string_fn == NULL) { 343 void *lib_handle = os::native_java_library(); 344 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 345 if (_to_java_string_fn == NULL) { 346 fatal("NewStringPlatform missing"); 347 } 348 } 349 350 jstring js = NULL; 351 { JavaThread* thread = (JavaThread*)THREAD; 352 assert(thread->is_Java_thread(), "must be java thread"); 353 HandleMark hm(thread); 354 ThreadToNativeFromVM ttn(thread); 355 js = (_to_java_string_fn)(thread->jni_environment(), str); 356 } 357 return Handle(THREAD, JNIHandles::resolve(js)); 358 } 359 360 // Converts a Java String to a native C string that can be used for 361 // native OS calls. 362 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 363 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 364 static to_platform_string_fn_t _to_platform_string_fn = NULL; 365 366 if (_to_platform_string_fn == NULL) { 367 void *lib_handle = os::native_java_library(); 368 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 369 if (_to_platform_string_fn == NULL) { 370 fatal("GetStringPlatformChars missing"); 371 } 372 } 373 374 char *native_platform_string; 375 { JavaThread* thread = (JavaThread*)THREAD; 376 assert(thread->is_Java_thread(), "must be java thread"); 377 JNIEnv *env = thread->jni_environment(); 378 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 379 bool is_copy; 380 HandleMark hm(thread); 381 ThreadToNativeFromVM ttn(thread); 382 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 383 assert(is_copy == JNI_TRUE, "is_copy value changed"); 384 JNIHandles::destroy_local(js); 385 } 386 return native_platform_string; 387 } 388 389 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 390 oop obj = java_string(); 391 // Typical usage is to convert all '/' to '.' in string. 392 typeArrayOop value = java_lang_String::value(obj); 393 int length = java_lang_String::length(obj); 394 bool is_latin1 = java_lang_String::is_latin1(obj); 395 396 // First check if any from_char exist 397 int index; // Declared outside, used later 398 for (index = 0; index < length; index++) { 399 jchar c = !is_latin1 ? value->char_at(index) : 400 ((jchar) value->byte_at(index)) & 0xff; 401 if (c == from_char) { 402 break; 403 } 404 } 405 if (index == length) { 406 // No from_char, so do not copy. 407 return java_string; 408 } 409 410 // Check if result string will be latin1 411 bool to_is_latin1 = false; 412 413 // Replacement char must be latin1 414 if (CompactStrings && UNICODE::is_latin1(to_char)) { 415 if (is_latin1) { 416 // Source string is latin1 as well 417 to_is_latin1 = true; 418 } else if (!UNICODE::is_latin1(from_char)) { 419 // We are replacing an UTF16 char. Scan string to 420 // check if result can be latin1 encoded. 421 to_is_latin1 = true; 422 for (index = 0; index < length; index++) { 423 jchar c = value->char_at(index); 424 if (c != from_char && !UNICODE::is_latin1(c)) { 425 to_is_latin1 = false; 426 break; 427 } 428 } 429 } 430 } 431 432 // Create new UNICODE (or byte) buffer. Must handlize value because GC 433 // may happen during String and char array creation. 434 typeArrayHandle h_value(THREAD, value); 435 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 436 typeArrayOop from_buffer = h_value(); 437 typeArrayOop to_buffer = java_lang_String::value(string()); 438 439 // Copy contents 440 for (index = 0; index < length; index++) { 441 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 442 ((jchar) from_buffer->byte_at(index)) & 0xff; 443 if (c == from_char) { 444 c = to_char; 445 } 446 if (!to_is_latin1) { 447 to_buffer->char_at_put(index, c); 448 } else { 449 to_buffer->byte_at_put(index, (jbyte) c); 450 } 451 } 452 return string; 453 } 454 455 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 456 typeArrayOop value = java_lang_String::value(java_string); 457 length = java_lang_String::length(java_string); 458 bool is_latin1 = java_lang_String::is_latin1(java_string); 459 460 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 461 if (result != NULL) { 462 if (!is_latin1) { 463 for (int index = 0; index < length; index++) { 464 result[index] = value->char_at(index); 465 } 466 } else { 467 for (int index = 0; index < length; index++) { 468 result[index] = ((jchar) value->byte_at(index)) & 0xff; 469 } 470 } 471 } else { 472 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 473 } 474 return result; 475 } 476 477 unsigned int java_lang_String::hash_code(oop java_string) { 478 int length = java_lang_String::length(java_string); 479 // Zero length string will hash to zero with String.hashCode() function. 480 if (length == 0) return 0; 481 482 typeArrayOop value = java_lang_String::value(java_string); 483 bool is_latin1 = java_lang_String::is_latin1(java_string); 484 485 if (is_latin1) { 486 return java_lang_String::hash_code(value->byte_at_addr(0), length); 487 } else { 488 return java_lang_String::hash_code(value->char_at_addr(0), length); 489 } 490 } 491 492 char* java_lang_String::as_quoted_ascii(oop java_string) { 493 typeArrayOop value = java_lang_String::value(java_string); 494 int length = java_lang_String::length(java_string); 495 bool is_latin1 = java_lang_String::is_latin1(java_string); 496 497 if (length == 0) return NULL; 498 499 char* result; 500 int result_length; 501 if (!is_latin1) { 502 jchar* base = value->char_at_addr(0); 503 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 504 result = NEW_RESOURCE_ARRAY(char, result_length); 505 UNICODE::as_quoted_ascii(base, length, result, result_length); 506 } else { 507 jbyte* base = value->byte_at_addr(0); 508 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 509 result = NEW_RESOURCE_ARRAY(char, result_length); 510 UNICODE::as_quoted_ascii(base, length, result, result_length); 511 } 512 assert(result_length >= length + 1, "must not be shorter"); 513 assert(result_length == (int)strlen(result) + 1, "must match"); 514 return result; 515 } 516 517 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 518 typeArrayOop value = java_lang_String::value(java_string); 519 int length = java_lang_String::length(java_string); 520 bool is_latin1 = java_lang_String::is_latin1(java_string); 521 if (!is_latin1) { 522 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 523 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 524 return sym; 525 } else { 526 ResourceMark rm; 527 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 528 const char* base = UNICODE::as_utf8(position, length); 529 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 530 return sym; 531 } 532 } 533 534 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 535 typeArrayOop value = java_lang_String::value(java_string); 536 int length = java_lang_String::length(java_string); 537 bool is_latin1 = java_lang_String::is_latin1(java_string); 538 if (!is_latin1) { 539 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 540 return SymbolTable::probe_unicode(base, length); 541 } else { 542 ResourceMark rm; 543 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 544 const char* base = UNICODE::as_utf8(position, length); 545 return SymbolTable::probe(base, length); 546 } 547 } 548 549 int java_lang_String::utf8_length(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 (length == 0) { 554 return 0; 555 } 556 if (!is_latin1) { 557 return UNICODE::utf8_length(value->char_at_addr(0), length); 558 } else { 559 return UNICODE::utf8_length(value->byte_at_addr(0), length); 560 } 561 } 562 563 char* java_lang_String::as_utf8_string(oop java_string) { 564 typeArrayOop value = java_lang_String::value(java_string); 565 int length = java_lang_String::length(java_string); 566 bool is_latin1 = java_lang_String::is_latin1(java_string); 567 if (!is_latin1) { 568 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 569 return UNICODE::as_utf8(position, length); 570 } else { 571 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 572 return UNICODE::as_utf8(position, length); 573 } 574 } 575 576 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 577 typeArrayOop value = java_lang_String::value(java_string); 578 int length = java_lang_String::length(java_string); 579 bool is_latin1 = java_lang_String::is_latin1(java_string); 580 if (!is_latin1) { 581 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 582 return UNICODE::as_utf8(position, length, buf, buflen); 583 } else { 584 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 585 return UNICODE::as_utf8(position, length, buf, buflen); 586 } 587 } 588 589 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 590 typeArrayOop value = java_lang_String::value(java_string); 591 int length = java_lang_String::length(java_string); 592 assert(start + len <= length, "just checking"); 593 bool is_latin1 = java_lang_String::is_latin1(java_string); 594 if (!is_latin1) { 595 jchar* position = value->char_at_addr(start); 596 return UNICODE::as_utf8(position, len); 597 } else { 598 jbyte* position = value->byte_at_addr(start); 599 return UNICODE::as_utf8(position, len); 600 } 601 } 602 603 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 604 typeArrayOop value = java_lang_String::value(java_string); 605 int length = java_lang_String::length(java_string); 606 assert(start + len <= length, "just checking"); 607 bool is_latin1 = java_lang_String::is_latin1(java_string); 608 if (!is_latin1) { 609 jchar* position = value->char_at_addr(start); 610 return UNICODE::as_utf8(position, len, buf, buflen); 611 } else { 612 jbyte* position = value->byte_at_addr(start); 613 return UNICODE::as_utf8(position, len, buf, buflen); 614 } 615 } 616 617 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 618 assert(java_string->klass() == SystemDictionary::String_klass(), 619 "must be java_string"); 620 typeArrayOop value = java_lang_String::value(java_string); 621 int length = java_lang_String::length(java_string); 622 if (length != len) { 623 return false; 624 } 625 bool is_latin1 = java_lang_String::is_latin1(java_string); 626 if (!is_latin1) { 627 for (int i = 0; i < len; i++) { 628 if (value->char_at(i) != chars[i]) { 629 return false; 630 } 631 } 632 } else { 633 for (int i = 0; i < len; i++) { 634 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 635 return false; 636 } 637 } 638 } 639 return true; 640 } 641 642 bool java_lang_String::equals(oop str1, oop str2) { 643 assert(str1->klass() == SystemDictionary::String_klass(), 644 "must be java String"); 645 assert(str2->klass() == SystemDictionary::String_klass(), 646 "must be java String"); 647 typeArrayOop value1 = java_lang_String::value(str1); 648 int length1 = java_lang_String::length(str1); 649 bool is_latin1 = java_lang_String::is_latin1(str1); 650 typeArrayOop value2 = java_lang_String::value(str2); 651 int length2 = java_lang_String::length(str2); 652 bool is_latin2 = java_lang_String::is_latin1(str2); 653 654 if ((length1 != length2) || (is_latin1 != is_latin2)) { 655 // Strings of different size or with different 656 // coders are never equal. 657 return false; 658 } 659 int blength1 = value1->length(); 660 for (int i = 0; i < value1->length(); i++) { 661 if (value1->byte_at(i) != value2->byte_at(i)) { 662 return false; 663 } 664 } 665 return true; 666 } 667 668 void java_lang_String::print(oop java_string, outputStream* st) { 669 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 670 typeArrayOop value = java_lang_String::value(java_string); 671 672 if (value == NULL) { 673 // This can happen if, e.g., printing a String 674 // object before its initializer has been called 675 st->print("NULL"); 676 return; 677 } 678 679 int length = java_lang_String::length(java_string); 680 bool is_latin1 = java_lang_String::is_latin1(java_string); 681 682 st->print("\""); 683 for (int index = 0; index < length; index++) { 684 st->print("%c", (!is_latin1) ? value->char_at(index) : 685 ((jchar) value->byte_at(index)) & 0xff ); 686 } 687 st->print("\""); 688 } 689 690 691 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 692 assert(mirror.not_null() && fd->is_static(), "just checking"); 693 if (fd->has_initial_value()) { 694 BasicType t = fd->field_type(); 695 switch (t) { 696 case T_BYTE: 697 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 698 break; 699 case T_BOOLEAN: 700 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 701 break; 702 case T_CHAR: 703 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 704 break; 705 case T_SHORT: 706 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 707 break; 708 case T_INT: 709 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 710 break; 711 case T_FLOAT: 712 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 713 break; 714 case T_DOUBLE: 715 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 716 break; 717 case T_LONG: 718 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 719 break; 720 case T_OBJECT: 721 { 722 #ifdef ASSERT 723 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 724 assert(fd->signature() == sym, "just checking"); 725 #endif 726 oop string = fd->string_initial_value(CHECK); 727 mirror()->obj_field_put(fd->offset(), string); 728 } 729 break; 730 default: 731 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 732 "Illegal ConstantValue attribute in class file"); 733 } 734 } 735 } 736 737 738 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 739 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 740 741 // If the offset was read from the shared archive, it was fixed up already 742 if (!k->is_shared()) { 743 if (k->is_instance_klass()) { 744 // During bootstrap, java.lang.Class wasn't loaded so static field 745 // offsets were computed without the size added it. Go back and 746 // update all the static field offsets to included the size. 747 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 748 if (fs.access_flags().is_static()) { 749 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 750 fs.set_offset(real_offset); 751 } 752 } 753 } 754 } 755 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 756 } 757 758 void java_lang_Class::initialize_mirror_fields(Klass* k, 759 Handle mirror, 760 Handle protection_domain, 761 TRAPS) { 762 // Allocate a simple java object for a lock. 763 // This needs to be a java object because during class initialization 764 // it can be held across a java call. 765 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 766 set_init_lock(mirror(), r); 767 768 // Set protection domain also 769 set_protection_domain(mirror(), protection_domain()); 770 771 // Initialize static fields 772 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 773 } 774 775 // Set the java.lang.reflect.Module module field in the java_lang_Class mirror 776 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 777 if (module.is_null()) { 778 // During startup, the module may be NULL only if java.base has not been defined yet. 779 // Put the class on the fixup_module_list to patch later when the java.lang.reflect.Module 780 // for java.base is known. 781 assert(!Universe::is_module_initialized(), "Incorrect java.lang.reflect.Module pre module system initialization"); 782 783 bool javabase_was_defined = false; 784 { 785 MutexLocker m1(Module_lock, THREAD); 786 // Keep list of classes needing java.base module fixup 787 if (!ModuleEntryTable::javabase_defined()) { 788 if (fixup_module_field_list() == NULL) { 789 GrowableArray<Klass*>* list = 790 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 791 set_fixup_module_field_list(list); 792 } 793 k->class_loader_data()->inc_keep_alive(); 794 fixup_module_field_list()->push(k); 795 } else { 796 javabase_was_defined = true; 797 } 798 } 799 800 // If java.base was already defined then patch this particular class with java.base. 801 if (javabase_was_defined) { 802 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 803 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 804 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 805 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module())); 806 set_module(mirror(), javabase_handle()); 807 } 808 } else { 809 assert(Universe::is_module_initialized() || 810 (ModuleEntryTable::javabase_defined() && 811 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))), 812 "Incorrect java.lang.reflect.Module specification while creating mirror"); 813 set_module(mirror(), module()); 814 } 815 } 816 817 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 818 Handle module, Handle protection_domain, TRAPS) { 819 assert(k->java_mirror() == NULL, "should only assign mirror once"); 820 // Use this moment of initialization to cache modifier_flags also, 821 // to support Class.getModifiers(). Instance classes recalculate 822 // the cached flags after the class file is parsed, but before the 823 // class is put into the system dictionary. 824 int computed_modifiers = k->compute_modifier_flags(CHECK); 825 k->set_modifier_flags(computed_modifiers); 826 // Class_klass has to be loaded because it is used to allocate 827 // the mirror. 828 if (SystemDictionary::Class_klass_loaded()) { 829 // Allocate mirror (java.lang.Class instance) 830 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 831 Handle mirror(THREAD, mirror_oop); 832 833 // Setup indirection from mirror->klass 834 if (k != NULL) { 835 java_lang_Class::set_klass(mirror(), k); 836 } 837 838 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 839 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 840 841 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 842 843 // It might also have a component mirror. This mirror must already exist. 844 if (k->is_array_klass()) { 845 oop comp_mirror; 846 if (k->is_typeArray_klass()) { 847 BasicType type = TypeArrayKlass::cast(k)->element_type(); 848 comp_mirror = Universe::java_mirror(type); 849 } else { 850 assert(k->is_objArray_klass(), "Must be"); 851 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 852 assert(element_klass != NULL, "Must have an element klass"); 853 comp_mirror = element_klass->java_mirror(); 854 } 855 assert(comp_mirror != NULL, "must have a mirror"); 856 857 // Two-way link between the array klass and its component mirror: 858 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 859 set_component_mirror(mirror(), comp_mirror); 860 set_array_klass(comp_mirror, k); 861 } else { 862 assert(k->is_instance_klass(), "Must be"); 863 864 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 865 if (HAS_PENDING_EXCEPTION) { 866 // If any of the fields throws an exception like OOM remove the klass field 867 // from the mirror so GC doesn't follow it after the klass has been deallocated. 868 // This mirror looks like a primitive type, which logically it is because it 869 // it represents no class. 870 java_lang_Class::set_klass(mirror(), NULL); 871 return; 872 } 873 } 874 875 // set the classLoader field in the java_lang_Class instance 876 assert(class_loader() == k->class_loader(), "should be same"); 877 set_class_loader(mirror(), class_loader()); 878 879 // set the module field in the java_lang_Class instance 880 set_mirror_module_field(k, mirror, module, THREAD); 881 882 // Setup indirection from klass->mirror last 883 // after any exceptions can happen during allocations. 884 if (k != NULL) { 885 k->set_java_mirror(mirror()); 886 } 887 } else { 888 if (fixup_mirror_list() == NULL) { 889 GrowableArray<Klass*>* list = 890 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 891 set_fixup_mirror_list(list); 892 } 893 fixup_mirror_list()->push(k); 894 } 895 } 896 897 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 898 assert(_module_offset != 0, "must have been computed already"); 899 java_lang_Class::set_module(k->java_mirror(), module()); 900 } 901 902 int java_lang_Class::oop_size(oop java_class) { 903 assert(_oop_size_offset != 0, "must be set"); 904 int size = java_class->int_field(_oop_size_offset); 905 assert(size > 0, "Oop size must be greater than zero, not %d", size); 906 return size; 907 } 908 909 void java_lang_Class::set_oop_size(oop java_class, int size) { 910 assert(_oop_size_offset != 0, "must be set"); 911 assert(size > 0, "Oop size must be greater than zero, not %d", size); 912 java_class->int_field_put(_oop_size_offset, size); 913 } 914 915 int java_lang_Class::static_oop_field_count(oop java_class) { 916 assert(_static_oop_field_count_offset != 0, "must be set"); 917 return java_class->int_field(_static_oop_field_count_offset); 918 } 919 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 920 assert(_static_oop_field_count_offset != 0, "must be set"); 921 java_class->int_field_put(_static_oop_field_count_offset, size); 922 } 923 924 oop java_lang_Class::protection_domain(oop java_class) { 925 assert(_protection_domain_offset != 0, "must be set"); 926 return java_class->obj_field(_protection_domain_offset); 927 } 928 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 929 assert(_protection_domain_offset != 0, "must be set"); 930 java_class->obj_field_put(_protection_domain_offset, pd); 931 } 932 933 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 934 assert(_component_mirror_offset != 0, "must be set"); 935 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 936 } 937 oop java_lang_Class::component_mirror(oop java_class) { 938 assert(_component_mirror_offset != 0, "must be set"); 939 return java_class->obj_field(_component_mirror_offset); 940 } 941 942 oop java_lang_Class::init_lock(oop java_class) { 943 assert(_init_lock_offset != 0, "must be set"); 944 return java_class->obj_field(_init_lock_offset); 945 } 946 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 947 assert(_init_lock_offset != 0, "must be set"); 948 java_class->obj_field_put(_init_lock_offset, init_lock); 949 } 950 951 objArrayOop java_lang_Class::signers(oop java_class) { 952 assert(_signers_offset != 0, "must be set"); 953 return (objArrayOop)java_class->obj_field(_signers_offset); 954 } 955 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 956 assert(_signers_offset != 0, "must be set"); 957 java_class->obj_field_put(_signers_offset, (oop)signers); 958 } 959 960 961 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 962 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 963 if (_class_loader_offset != 0) { 964 java_class->obj_field_put(_class_loader_offset, loader); 965 } 966 } 967 968 oop java_lang_Class::class_loader(oop java_class) { 969 assert(_class_loader_offset != 0, "must be set"); 970 return java_class->obj_field(_class_loader_offset); 971 } 972 973 oop java_lang_Class::module(oop java_class) { 974 assert(_module_offset != 0, "must be set"); 975 return java_class->obj_field(_module_offset); 976 } 977 978 void java_lang_Class::set_module(oop java_class, oop module) { 979 assert(_module_offset != 0, "must be set"); 980 java_class->obj_field_put(_module_offset, module); 981 } 982 983 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 984 // This should be improved by adding a field at the Java level or by 985 // introducing a new VM klass (see comment in ClassFileParser) 986 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 987 if (type != T_VOID) { 988 Klass* aklass = Universe::typeArrayKlassObj(type); 989 assert(aklass != NULL, "correct bootstrap"); 990 set_array_klass(java_class, aklass); 991 } 992 #ifdef ASSERT 993 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 994 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 995 #endif 996 return java_class; 997 } 998 999 1000 Klass* java_lang_Class::as_Klass(oop java_class) { 1001 //%note memory_2 1002 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1003 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1004 assert(k == NULL || k->is_klass(), "type check"); 1005 return k; 1006 } 1007 1008 1009 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1010 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1011 java_class->metadata_field_put(_klass_offset, klass); 1012 } 1013 1014 1015 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1016 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1017 Symbol* name = NULL; 1018 bool is_instance = false; 1019 if (is_primitive(java_class)) { 1020 name = vmSymbols::type_signature(primitive_type(java_class)); 1021 } else { 1022 Klass* k = as_Klass(java_class); 1023 is_instance = k->is_instance_klass(); 1024 name = k->name(); 1025 } 1026 if (name == NULL) { 1027 st->print("<null>"); 1028 return; 1029 } 1030 if (is_instance) st->print("L"); 1031 st->write((char*) name->base(), (int) name->utf8_length()); 1032 if (is_instance) st->print(";"); 1033 } 1034 1035 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1036 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1037 Symbol* name; 1038 if (is_primitive(java_class)) { 1039 name = vmSymbols::type_signature(primitive_type(java_class)); 1040 // Because this can create a new symbol, the caller has to decrement 1041 // the refcount, so make adjustment here and below for symbols returned 1042 // that are not created or incremented due to a successful lookup. 1043 name->increment_refcount(); 1044 } else { 1045 Klass* k = as_Klass(java_class); 1046 if (!k->is_instance_klass()) { 1047 name = k->name(); 1048 name->increment_refcount(); 1049 } else { 1050 ResourceMark rm; 1051 const char* sigstr = k->signature_name(); 1052 int siglen = (int) strlen(sigstr); 1053 if (!intern_if_not_found) { 1054 name = SymbolTable::probe(sigstr, siglen); 1055 } else { 1056 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1057 } 1058 } 1059 } 1060 return name; 1061 } 1062 1063 // Returns the Java name for this Java mirror (Resource allocated) 1064 // See Klass::external_name(). 1065 // For primitive type Java mirrors, its type name is returned. 1066 const char* java_lang_Class::as_external_name(oop java_class) { 1067 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1068 const char* name = NULL; 1069 if (is_primitive(java_class)) { 1070 name = type2name(primitive_type(java_class)); 1071 } else { 1072 name = as_Klass(java_class)->external_name(); 1073 } 1074 if (name == NULL) { 1075 name = "<null>"; 1076 } 1077 return name; 1078 } 1079 1080 Klass* java_lang_Class::array_klass(oop java_class) { 1081 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1082 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1083 return k; 1084 } 1085 1086 1087 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1088 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1089 java_class->metadata_field_put(_array_klass_offset, klass); 1090 } 1091 1092 1093 bool java_lang_Class::is_primitive(oop java_class) { 1094 // should assert: 1095 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1096 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1097 1098 #ifdef ASSERT 1099 if (is_primitive) { 1100 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1101 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1102 "Should be either the T_VOID primitive or a java primitive"); 1103 } 1104 #endif 1105 1106 return is_primitive; 1107 } 1108 1109 1110 BasicType java_lang_Class::primitive_type(oop java_class) { 1111 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1112 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1113 BasicType type = T_VOID; 1114 if (ak != NULL) { 1115 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1116 type = ArrayKlass::cast(ak)->element_type(); 1117 } else { 1118 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1119 } 1120 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1121 return type; 1122 } 1123 1124 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1125 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1126 if (is_primitive(java_class)) { 1127 if (reference_klass != NULL) 1128 (*reference_klass) = NULL; 1129 return primitive_type(java_class); 1130 } else { 1131 if (reference_klass != NULL) 1132 (*reference_klass) = as_Klass(java_class); 1133 return T_OBJECT; 1134 } 1135 } 1136 1137 1138 oop java_lang_Class::primitive_mirror(BasicType t) { 1139 oop mirror = Universe::java_mirror(t); 1140 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1141 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1142 return mirror; 1143 } 1144 1145 bool java_lang_Class::offsets_computed = false; 1146 int java_lang_Class::classRedefinedCount_offset = -1; 1147 1148 void java_lang_Class::compute_offsets() { 1149 assert(!offsets_computed, "offsets should be initialized only once"); 1150 offsets_computed = true; 1151 1152 Klass* k = SystemDictionary::Class_klass(); 1153 // The classRedefinedCount field is only present starting in 1.5, 1154 // so don't go fatal. 1155 compute_optional_offset(classRedefinedCount_offset, 1156 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1157 1158 // Needs to be optional because the old build runs Queens during bootstrapping 1159 // and jdk8-9 doesn't have coordinated pushes yet. 1160 compute_optional_offset(_class_loader_offset, 1161 k, vmSymbols::classLoader_name(), 1162 vmSymbols::classloader_signature()); 1163 1164 compute_offset(_component_mirror_offset, 1165 k, vmSymbols::componentType_name(), 1166 vmSymbols::class_signature()); 1167 1168 compute_offset(_module_offset, 1169 k, vmSymbols::module_name(), 1170 vmSymbols::module_signature()); 1171 1172 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1173 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1174 // GC treats them the same. 1175 _init_lock_offset = _component_mirror_offset; 1176 1177 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1178 } 1179 1180 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1181 if (classRedefinedCount_offset == -1) { 1182 // If we don't have an offset for it then just return -1 as a marker. 1183 return -1; 1184 } 1185 1186 return the_class_mirror->int_field(classRedefinedCount_offset); 1187 } 1188 1189 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1190 if (classRedefinedCount_offset == -1) { 1191 // If we don't have an offset for it then nothing to set. 1192 return; 1193 } 1194 1195 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1196 } 1197 1198 1199 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1200 // platform thread structure, and a eetop offset which was used for thread 1201 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1202 // merged, so in the HotSpot VM we just use the eetop field for the thread 1203 // instead of the privateInfo_offset. 1204 // 1205 // Note: The stackSize field is only present starting in 1.4. 1206 1207 int java_lang_Thread::_name_offset = 0; 1208 int java_lang_Thread::_group_offset = 0; 1209 int java_lang_Thread::_contextClassLoader_offset = 0; 1210 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1211 int java_lang_Thread::_priority_offset = 0; 1212 int java_lang_Thread::_eetop_offset = 0; 1213 int java_lang_Thread::_daemon_offset = 0; 1214 int java_lang_Thread::_stillborn_offset = 0; 1215 int java_lang_Thread::_stackSize_offset = 0; 1216 int java_lang_Thread::_tid_offset = 0; 1217 int java_lang_Thread::_thread_status_offset = 0; 1218 int java_lang_Thread::_park_blocker_offset = 0; 1219 int java_lang_Thread::_park_event_offset = 0 ; 1220 1221 1222 void java_lang_Thread::compute_offsets() { 1223 assert(_group_offset == 0, "offsets should be initialized only once"); 1224 1225 Klass* k = SystemDictionary::Thread_klass(); 1226 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1227 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1228 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1229 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1230 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1231 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1232 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1233 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1234 // The stackSize field is only present starting in 1.4, so don't go fatal. 1235 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1236 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1237 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1238 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1239 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1240 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1241 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1242 vmSymbols::long_signature()); 1243 } 1244 1245 1246 JavaThread* java_lang_Thread::thread(oop java_thread) { 1247 return (JavaThread*)java_thread->address_field(_eetop_offset); 1248 } 1249 1250 1251 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1252 java_thread->address_field_put(_eetop_offset, (address)thread); 1253 } 1254 1255 1256 oop java_lang_Thread::name(oop java_thread) { 1257 return java_thread->obj_field(_name_offset); 1258 } 1259 1260 1261 void java_lang_Thread::set_name(oop java_thread, oop name) { 1262 java_thread->obj_field_put(_name_offset, name); 1263 } 1264 1265 1266 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1267 return (ThreadPriority)java_thread->int_field(_priority_offset); 1268 } 1269 1270 1271 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1272 java_thread->int_field_put(_priority_offset, priority); 1273 } 1274 1275 1276 oop java_lang_Thread::threadGroup(oop java_thread) { 1277 return java_thread->obj_field(_group_offset); 1278 } 1279 1280 1281 bool java_lang_Thread::is_stillborn(oop java_thread) { 1282 return java_thread->bool_field(_stillborn_offset) != 0; 1283 } 1284 1285 1286 // We never have reason to turn the stillborn bit off 1287 void java_lang_Thread::set_stillborn(oop java_thread) { 1288 java_thread->bool_field_put(_stillborn_offset, true); 1289 } 1290 1291 1292 bool java_lang_Thread::is_alive(oop java_thread) { 1293 JavaThread* thr = java_lang_Thread::thread(java_thread); 1294 return (thr != NULL); 1295 } 1296 1297 1298 bool java_lang_Thread::is_daemon(oop java_thread) { 1299 return java_thread->bool_field(_daemon_offset) != 0; 1300 } 1301 1302 1303 void java_lang_Thread::set_daemon(oop java_thread) { 1304 java_thread->bool_field_put(_daemon_offset, true); 1305 } 1306 1307 oop java_lang_Thread::context_class_loader(oop java_thread) { 1308 return java_thread->obj_field(_contextClassLoader_offset); 1309 } 1310 1311 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1312 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1313 } 1314 1315 1316 jlong java_lang_Thread::stackSize(oop java_thread) { 1317 if (_stackSize_offset > 0) { 1318 return java_thread->long_field(_stackSize_offset); 1319 } else { 1320 return 0; 1321 } 1322 } 1323 1324 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1325 void java_lang_Thread::set_thread_status(oop java_thread, 1326 java_lang_Thread::ThreadStatus status) { 1327 // The threadStatus is only present starting in 1.5 1328 if (_thread_status_offset > 0) { 1329 java_thread->int_field_put(_thread_status_offset, status); 1330 } 1331 } 1332 1333 // Read thread status value from threadStatus field in java.lang.Thread java class. 1334 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1335 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1336 JavaThread::current()->thread_state() == _thread_in_vm, 1337 "Java Thread is not running in vm"); 1338 // The threadStatus is only present starting in 1.5 1339 if (_thread_status_offset > 0) { 1340 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1341 } else { 1342 // All we can easily figure out is if it is alive, but that is 1343 // enough info for a valid unknown status. 1344 // These aren't restricted to valid set ThreadStatus values, so 1345 // use JVMTI values and cast. 1346 JavaThread* thr = java_lang_Thread::thread(java_thread); 1347 if (thr == NULL) { 1348 // the thread hasn't run yet or is in the process of exiting 1349 return NEW; 1350 } 1351 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1352 } 1353 } 1354 1355 1356 jlong java_lang_Thread::thread_id(oop java_thread) { 1357 // The thread ID field is only present starting in 1.5 1358 if (_tid_offset > 0) { 1359 return java_thread->long_field(_tid_offset); 1360 } else { 1361 return 0; 1362 } 1363 } 1364 1365 oop java_lang_Thread::park_blocker(oop java_thread) { 1366 assert(JDK_Version::current().supports_thread_park_blocker() && 1367 _park_blocker_offset != 0, "Must support parkBlocker field"); 1368 1369 if (_park_blocker_offset > 0) { 1370 return java_thread->obj_field(_park_blocker_offset); 1371 } 1372 1373 return NULL; 1374 } 1375 1376 jlong java_lang_Thread::park_event(oop java_thread) { 1377 if (_park_event_offset > 0) { 1378 return java_thread->long_field(_park_event_offset); 1379 } 1380 return 0; 1381 } 1382 1383 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1384 if (_park_event_offset > 0) { 1385 java_thread->long_field_put(_park_event_offset, ptr); 1386 return true; 1387 } 1388 return false; 1389 } 1390 1391 1392 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1393 assert(_thread_status_offset != 0, "Must have thread status"); 1394 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1395 switch (status) { 1396 case NEW : return "NEW"; 1397 case RUNNABLE : return "RUNNABLE"; 1398 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1399 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1400 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1401 case PARKED : return "WAITING (parking)"; 1402 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1403 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1404 case TERMINATED : return "TERMINATED"; 1405 default : return "UNKNOWN"; 1406 }; 1407 } 1408 int java_lang_ThreadGroup::_parent_offset = 0; 1409 int java_lang_ThreadGroup::_name_offset = 0; 1410 int java_lang_ThreadGroup::_threads_offset = 0; 1411 int java_lang_ThreadGroup::_groups_offset = 0; 1412 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1413 int java_lang_ThreadGroup::_destroyed_offset = 0; 1414 int java_lang_ThreadGroup::_daemon_offset = 0; 1415 int java_lang_ThreadGroup::_nthreads_offset = 0; 1416 int java_lang_ThreadGroup::_ngroups_offset = 0; 1417 1418 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1419 assert(java_thread_group->is_oop(), "thread group must be oop"); 1420 return java_thread_group->obj_field(_parent_offset); 1421 } 1422 1423 // ("name as oop" accessor is not necessary) 1424 1425 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1426 oop name = java_thread_group->obj_field(_name_offset); 1427 // ThreadGroup.name can be null 1428 if (name != NULL) { 1429 return java_lang_String::as_utf8_string(name); 1430 } 1431 return NULL; 1432 } 1433 1434 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1435 assert(java_thread_group->is_oop(), "thread group must be oop"); 1436 return java_thread_group->int_field(_nthreads_offset); 1437 } 1438 1439 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1440 oop threads = java_thread_group->obj_field(_threads_offset); 1441 assert(threads != NULL, "threadgroups should have threads"); 1442 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1443 return objArrayOop(threads); 1444 } 1445 1446 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1447 assert(java_thread_group->is_oop(), "thread group must be oop"); 1448 return java_thread_group->int_field(_ngroups_offset); 1449 } 1450 1451 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1452 oop groups = java_thread_group->obj_field(_groups_offset); 1453 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1454 return objArrayOop(groups); 1455 } 1456 1457 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1458 assert(java_thread_group->is_oop(), "thread group must be oop"); 1459 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1460 } 1461 1462 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1463 assert(java_thread_group->is_oop(), "thread group must be oop"); 1464 return java_thread_group->bool_field(_destroyed_offset) != 0; 1465 } 1466 1467 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1468 assert(java_thread_group->is_oop(), "thread group must be oop"); 1469 return java_thread_group->bool_field(_daemon_offset) != 0; 1470 } 1471 1472 void java_lang_ThreadGroup::compute_offsets() { 1473 assert(_parent_offset == 0, "offsets should be initialized only once"); 1474 1475 Klass* k = SystemDictionary::ThreadGroup_klass(); 1476 1477 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1478 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1479 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1480 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1481 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1482 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1483 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1484 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1485 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1486 } 1487 1488 1489 void java_lang_Throwable::compute_offsets() { 1490 Klass* k = SystemDictionary::Throwable_klass(); 1491 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1492 } 1493 1494 oop java_lang_Throwable::unassigned_stacktrace() { 1495 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1496 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1497 if (UseCompressedOops) { 1498 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1499 } else { 1500 return oopDesc::load_decode_heap_oop((oop*)addr); 1501 } 1502 } 1503 1504 oop java_lang_Throwable::backtrace(oop throwable) { 1505 return throwable->obj_field_acquire(backtrace_offset); 1506 } 1507 1508 1509 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1510 throwable->release_obj_field_put(backtrace_offset, value); 1511 } 1512 1513 int java_lang_Throwable::depth(oop throwable) { 1514 return throwable->int_field(depth_offset); 1515 } 1516 1517 void java_lang_Throwable::set_depth(oop throwable, int value) { 1518 throwable->int_field_put(depth_offset, value); 1519 } 1520 1521 oop java_lang_Throwable::message(oop throwable) { 1522 return throwable->obj_field(detailMessage_offset); 1523 } 1524 1525 1526 // Return Symbol for detailed_message or NULL 1527 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1528 PRESERVE_EXCEPTION_MARK; // Keep original exception 1529 oop detailed_message = java_lang_Throwable::message(throwable); 1530 if (detailed_message != NULL) { 1531 return java_lang_String::as_symbol(detailed_message, THREAD); 1532 } 1533 return NULL; 1534 } 1535 1536 void java_lang_Throwable::set_message(oop throwable, oop value) { 1537 throwable->obj_field_put(detailMessage_offset, value); 1538 } 1539 1540 1541 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1542 throwable->obj_field_put(stackTrace_offset, st_element_array); 1543 } 1544 1545 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1546 set_stacktrace(throwable, NULL); 1547 } 1548 1549 1550 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1551 ResourceMark rm; 1552 Klass* k = throwable->klass(); 1553 assert(k != NULL, "just checking"); 1554 st->print("%s", k->external_name()); 1555 oop msg = message(throwable); 1556 if (msg != NULL) { 1557 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1558 } 1559 } 1560 1561 // After this many redefines, the stack trace is unreliable. 1562 const int MAX_VERSION = USHRT_MAX; 1563 1564 static inline bool version_matches(Method* method, int version) { 1565 assert(version < MAX_VERSION, "version is too big"); 1566 return method != NULL && (method->constants()->version() == version); 1567 } 1568 1569 1570 // This class provides a simple wrapper over the internal structure of 1571 // exception backtrace to insulate users of the backtrace from needing 1572 // to know what it looks like. 1573 class BacktraceBuilder: public StackObj { 1574 friend class BacktraceIterator; 1575 private: 1576 Handle _backtrace; 1577 objArrayOop _head; 1578 typeArrayOop _methods; 1579 typeArrayOop _bcis; 1580 objArrayOop _mirrors; 1581 typeArrayOop _names; // needed to insulate method name against redefinition 1582 int _index; 1583 NoSafepointVerifier _nsv; 1584 1585 enum { 1586 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1587 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1588 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1589 trace_names_offset = java_lang_Throwable::trace_names_offset, 1590 trace_next_offset = java_lang_Throwable::trace_next_offset, 1591 trace_size = java_lang_Throwable::trace_size, 1592 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1593 }; 1594 1595 // get info out of chunks 1596 static typeArrayOop get_methods(objArrayHandle chunk) { 1597 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1598 assert(methods != NULL, "method array should be initialized in backtrace"); 1599 return methods; 1600 } 1601 static typeArrayOop get_bcis(objArrayHandle chunk) { 1602 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1603 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1604 return bcis; 1605 } 1606 static objArrayOop get_mirrors(objArrayHandle chunk) { 1607 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1608 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1609 return mirrors; 1610 } 1611 static typeArrayOop get_names(objArrayHandle chunk) { 1612 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1613 assert(names != NULL, "names array should be initialized in backtrace"); 1614 return names; 1615 } 1616 1617 public: 1618 1619 // constructor for new backtrace 1620 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1621 expand(CHECK); 1622 _backtrace = Handle(THREAD, _head); 1623 _index = 0; 1624 } 1625 1626 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1627 _methods = get_methods(backtrace); 1628 _bcis = get_bcis(backtrace); 1629 _mirrors = get_mirrors(backtrace); 1630 _names = get_names(backtrace); 1631 assert(_methods->length() == _bcis->length() && 1632 _methods->length() == _mirrors->length() && 1633 _mirrors->length() == _names->length(), 1634 "method and source information arrays should match"); 1635 1636 // head is the preallocated backtrace 1637 _head = backtrace(); 1638 _backtrace = Handle(thread, _head); 1639 _index = 0; 1640 } 1641 1642 void expand(TRAPS) { 1643 objArrayHandle old_head(THREAD, _head); 1644 PauseNoSafepointVerifier pnsv(&_nsv); 1645 1646 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1647 objArrayHandle new_head(THREAD, head); 1648 1649 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1650 typeArrayHandle new_methods(THREAD, methods); 1651 1652 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1653 typeArrayHandle new_bcis(THREAD, bcis); 1654 1655 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1656 objArrayHandle new_mirrors(THREAD, mirrors); 1657 1658 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 1659 typeArrayHandle new_names(THREAD, names); 1660 1661 if (!old_head.is_null()) { 1662 old_head->obj_at_put(trace_next_offset, new_head()); 1663 } 1664 new_head->obj_at_put(trace_methods_offset, new_methods()); 1665 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1666 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1667 new_head->obj_at_put(trace_names_offset, new_names()); 1668 1669 _head = new_head(); 1670 _methods = new_methods(); 1671 _bcis = new_bcis(); 1672 _mirrors = new_mirrors(); 1673 _names = new_names(); 1674 _index = 0; 1675 } 1676 1677 oop backtrace() { 1678 return _backtrace(); 1679 } 1680 1681 inline void push(Method* method, int bci, TRAPS) { 1682 // Smear the -1 bci to 0 since the array only holds unsigned 1683 // shorts. The later line number lookup would just smear the -1 1684 // to a 0 even if it could be recorded. 1685 if (bci == SynchronizationEntryBCI) bci = 0; 1686 1687 if (_index >= trace_chunk_size) { 1688 methodHandle mhandle(THREAD, method); 1689 expand(CHECK); 1690 method = mhandle(); 1691 } 1692 1693 _methods->short_at_put(_index, method->orig_method_idnum()); 1694 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1695 1696 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 1697 // klass owning the symbols alive so their refcounts aren't decremented. 1698 Symbol* name = method->name(); 1699 _names->symbol_at_put(_index, name); 1700 1701 // We need to save the mirrors in the backtrace to keep the class 1702 // from being unloaded while we still have this stack trace. 1703 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1704 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1705 _index++; 1706 } 1707 1708 }; 1709 1710 struct BacktraceElement : public StackObj { 1711 int _method_id; 1712 int _bci; 1713 int _version; 1714 Symbol* _name; 1715 Handle _mirror; 1716 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 1717 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 1718 }; 1719 1720 class BacktraceIterator : public StackObj { 1721 int _index; 1722 objArrayHandle _result; 1723 objArrayHandle _mirrors; 1724 typeArrayHandle _methods; 1725 typeArrayHandle _bcis; 1726 typeArrayHandle _names; 1727 1728 void init(objArrayHandle result, Thread* thread) { 1729 // Get method id, bci, version and mirror from chunk 1730 _result = result; 1731 if (_result.not_null()) { 1732 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1733 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1734 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1735 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 1736 _index = 0; 1737 } 1738 } 1739 public: 1740 BacktraceIterator(objArrayHandle result, Thread* thread) { 1741 init(result, thread); 1742 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1743 } 1744 1745 BacktraceElement next(Thread* thread) { 1746 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1747 _methods->short_at(_index), 1748 Backtrace::version_at(_bcis->int_at(_index)), 1749 Backtrace::bci_at(_bcis->int_at(_index)), 1750 _names->symbol_at(_index)); 1751 _index++; 1752 1753 if (_index >= java_lang_Throwable::trace_chunk_size) { 1754 int next_offset = java_lang_Throwable::trace_next_offset; 1755 // Get next chunk 1756 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1757 init(result, thread); 1758 } 1759 return e; 1760 } 1761 1762 bool repeat() { 1763 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1764 } 1765 }; 1766 1767 1768 // Print stack trace element to resource allocated buffer 1769 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1770 int version, int bci, Symbol* name) { 1771 ResourceMark rm; 1772 1773 // Get strings and string lengths 1774 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1775 const char* klass_name = holder->external_name(); 1776 int buf_len = (int)strlen(klass_name); 1777 1778 char* method_name = name->as_C_string(); 1779 buf_len += (int)strlen(method_name); 1780 1781 char* source_file_name = NULL; 1782 Symbol* source = Backtrace::get_source_file_name(holder, version); 1783 if (source != NULL) { 1784 source_file_name = source->as_C_string(); 1785 buf_len += (int)strlen(source_file_name); 1786 } 1787 1788 char *module_name = NULL, *module_version = NULL; 1789 ModuleEntry* module = holder->module(); 1790 if (module->is_named()) { 1791 module_name = module->name()->as_C_string(); 1792 buf_len += (int)strlen(module_name); 1793 if (module->version() != NULL) { 1794 module_version = module->version()->as_C_string(); 1795 buf_len += (int)strlen(module_version); 1796 } 1797 } 1798 1799 // Allocate temporary buffer with extra space for formatting and line number 1800 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1801 1802 // Print stack trace line in buffer 1803 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1804 1805 // Print module information 1806 if (module_name != NULL) { 1807 if (module_version != NULL) { 1808 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1809 } else { 1810 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1811 } 1812 } 1813 1814 // The method can be NULL if the requested class version is gone 1815 Method* method = holder->method_with_orig_idnum(method_id, version); 1816 if (!version_matches(method, version)) { 1817 strcat(buf, "Redefined)"); 1818 } else { 1819 int line_number = Backtrace::get_line_number(method, bci); 1820 if (line_number == -2) { 1821 strcat(buf, "Native Method)"); 1822 } else { 1823 if (source_file_name != NULL && (line_number != -1)) { 1824 // Sourcename and linenumber 1825 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1826 } else if (source_file_name != NULL) { 1827 // Just sourcename 1828 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1829 } else { 1830 // Neither sourcename nor linenumber 1831 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1832 } 1833 CompiledMethod* nm = method->code(); 1834 if (WizardMode && nm != NULL) { 1835 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1836 } 1837 } 1838 } 1839 1840 st->print_cr("%s", buf); 1841 } 1842 1843 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1844 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 1845 int method_id = method->orig_method_idnum(); 1846 int version = method->constants()->version(); 1847 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 1848 } 1849 1850 /** 1851 * Print the throwable message and its stack trace plus all causes by walking the 1852 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1853 */ 1854 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1855 // First, print the message. 1856 print(throwable(), st); 1857 st->cr(); 1858 1859 // Now print the stack trace. 1860 Thread* THREAD = Thread::current(); 1861 while (throwable.not_null()) { 1862 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1863 if (result.is_null()) { 1864 st->print_raw_cr("\t<<no stack trace available>>"); 1865 return; 1866 } 1867 BacktraceIterator iter(result, THREAD); 1868 1869 while (iter.repeat()) { 1870 BacktraceElement bte = iter.next(THREAD); 1871 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 1872 } 1873 { 1874 // Call getCause() which doesn't necessarily return the _cause field. 1875 EXCEPTION_MARK; 1876 JavaValue cause(T_OBJECT); 1877 JavaCalls::call_virtual(&cause, 1878 throwable, 1879 throwable->klass(), 1880 vmSymbols::getCause_name(), 1881 vmSymbols::void_throwable_signature(), 1882 THREAD); 1883 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1884 if (HAS_PENDING_EXCEPTION) { 1885 CLEAR_PENDING_EXCEPTION; 1886 throwable = Handle(); 1887 } else { 1888 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1889 if (throwable.not_null()) { 1890 st->print("Caused by: "); 1891 print(throwable(), st); 1892 st->cr(); 1893 } 1894 } 1895 } 1896 } 1897 } 1898 1899 /** 1900 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1901 */ 1902 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1903 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1904 JavaValue result(T_VOID); 1905 JavaCalls::call_virtual(&result, 1906 throwable, 1907 SystemDictionary::Throwable_klass(), 1908 vmSymbols::printStackTrace_name(), 1909 vmSymbols::void_method_signature(), 1910 THREAD); 1911 } 1912 1913 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1914 if (!StackTraceInThrowable) return; 1915 ResourceMark rm(THREAD); 1916 1917 // Start out by clearing the backtrace for this object, in case the VM 1918 // runs out of memory while allocating the stack trace 1919 set_backtrace(throwable(), NULL); 1920 // Clear lazily constructed Java level stacktrace if refilling occurs 1921 // This is unnecessary in 1.7+ but harmless 1922 clear_stacktrace(throwable()); 1923 1924 int max_depth = MaxJavaStackTraceDepth; 1925 JavaThread* thread = (JavaThread*)THREAD; 1926 1927 BacktraceBuilder bt(CHECK); 1928 1929 // If there is no Java frame just return the method that was being called 1930 // with bci 0 1931 if (!thread->has_last_Java_frame()) { 1932 if (max_depth >= 1 && method() != NULL) { 1933 bt.push(method(), 0, CHECK); 1934 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1935 set_depth(throwable(), 1); 1936 set_backtrace(throwable(), bt.backtrace()); 1937 } 1938 return; 1939 } 1940 1941 // Instead of using vframe directly, this version of fill_in_stack_trace 1942 // basically handles everything by hand. This significantly improved the 1943 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1944 // See bug 6333838 for more details. 1945 // The "ASSERT" here is to verify this method generates the exactly same stack 1946 // trace as utilizing vframe. 1947 #ifdef ASSERT 1948 vframeStream st(thread); 1949 methodHandle st_method(THREAD, st.method()); 1950 #endif 1951 int total_count = 0; 1952 RegisterMap map(thread, false); 1953 int decode_offset = 0; 1954 CompiledMethod* nm = NULL; 1955 bool skip_fillInStackTrace_check = false; 1956 bool skip_throwableInit_check = false; 1957 bool skip_hidden = !ShowHiddenFrames; 1958 1959 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1960 Method* method = NULL; 1961 int bci = 0; 1962 1963 // Compiled java method case. 1964 if (decode_offset != 0) { 1965 DebugInfoReadStream stream(nm, decode_offset); 1966 decode_offset = stream.read_int(); 1967 method = (Method*)nm->metadata_at(stream.read_int()); 1968 bci = stream.read_bci(); 1969 } else { 1970 if (fr.is_first_frame()) break; 1971 address pc = fr.pc(); 1972 if (fr.is_interpreted_frame()) { 1973 address bcp = fr.interpreter_frame_bcp(); 1974 method = fr.interpreter_frame_method(); 1975 bci = method->bci_from(bcp); 1976 fr = fr.sender(&map); 1977 } else { 1978 CodeBlob* cb = fr.cb(); 1979 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1980 // but non nmethod 1981 fr = fr.sender(&map); 1982 if (cb == NULL || !cb->is_compiled()) { 1983 continue; 1984 } 1985 nm = cb->as_compiled_method(); 1986 if (nm->method()->is_native()) { 1987 method = nm->method(); 1988 bci = 0; 1989 } else { 1990 PcDesc* pd = nm->pc_desc_at(pc); 1991 decode_offset = pd->scope_decode_offset(); 1992 // if decode_offset is not equal to 0, it will execute the 1993 // "compiled java method case" at the beginning of the loop. 1994 continue; 1995 } 1996 } 1997 } 1998 #ifdef ASSERT 1999 assert(st_method() == method && st.bci() == bci, 2000 "Wrong stack trace"); 2001 st.next(); 2002 // vframeStream::method isn't GC-safe so store off a copy 2003 // of the Method* in case we GC. 2004 if (!st.at_end()) { 2005 st_method = st.method(); 2006 } 2007 #endif 2008 2009 // the format of the stacktrace will be: 2010 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2011 // - 0 or more <init> methods for the exception class (skipped) 2012 // - rest of the stack 2013 2014 if (!skip_fillInStackTrace_check) { 2015 if (method->name() == vmSymbols::fillInStackTrace_name() && 2016 throwable->is_a(method->method_holder())) { 2017 continue; 2018 } 2019 else { 2020 skip_fillInStackTrace_check = true; // gone past them all 2021 } 2022 } 2023 if (!skip_throwableInit_check) { 2024 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2025 2026 // skip <init> methods of the exception class and superclasses 2027 // This is simlar to classic VM. 2028 if (method->name() == vmSymbols::object_initializer_name() && 2029 throwable->is_a(method->method_holder())) { 2030 continue; 2031 } else { 2032 // there are none or we've seen them all - either way stop checking 2033 skip_throwableInit_check = true; 2034 } 2035 } 2036 if (method->is_hidden()) { 2037 if (skip_hidden) continue; 2038 } 2039 bt.push(method, bci, CHECK); 2040 total_count++; 2041 } 2042 2043 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2044 2045 // Put completed stack trace into throwable object 2046 set_backtrace(throwable(), bt.backtrace()); 2047 set_depth(throwable(), total_count); 2048 } 2049 2050 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2051 // No-op if stack trace is disabled 2052 if (!StackTraceInThrowable) { 2053 return; 2054 } 2055 2056 // Disable stack traces for some preallocated out of memory errors 2057 if (!Universe::should_fill_in_stack_trace(throwable)) { 2058 return; 2059 } 2060 2061 PRESERVE_EXCEPTION_MARK; 2062 2063 JavaThread* thread = JavaThread::active(); 2064 fill_in_stack_trace(throwable, method, thread); 2065 // ignore exceptions thrown during stack trace filling 2066 CLEAR_PENDING_EXCEPTION; 2067 } 2068 2069 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2070 // Allocate stack trace - backtrace is created but not filled in 2071 2072 // No-op if stack trace is disabled 2073 if (!StackTraceInThrowable) return; 2074 BacktraceBuilder bt(CHECK); // creates a backtrace 2075 set_backtrace(throwable(), bt.backtrace()); 2076 } 2077 2078 2079 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2080 // Fill in stack trace into preallocated backtrace (no GC) 2081 2082 // No-op if stack trace is disabled 2083 if (!StackTraceInThrowable) return; 2084 2085 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2086 2087 JavaThread* THREAD = JavaThread::current(); 2088 2089 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2090 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2091 2092 ResourceMark rm(THREAD); 2093 vframeStream st(THREAD); 2094 2095 BacktraceBuilder bt(THREAD, backtrace); 2096 2097 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2098 // methods as preallocated errors aren't created by "java" code. 2099 2100 // fill in as much stack trace as possible 2101 int chunk_count = 0; 2102 for (;!st.at_end(); st.next()) { 2103 bt.push(st.method(), st.bci(), CHECK); 2104 chunk_count++; 2105 2106 // Bail-out for deep stacks 2107 if (chunk_count >= trace_chunk_size) break; 2108 } 2109 set_depth(throwable(), chunk_count); 2110 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2111 2112 // We support the Throwable immutability protocol defined for Java 7. 2113 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2114 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2115 } 2116 2117 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2118 objArrayHandle stack_trace_array_h, TRAPS) { 2119 2120 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2121 THROW(vmSymbols::java_lang_NullPointerException()); 2122 } 2123 2124 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2125 2126 if (stack_trace_array_h->length() != depth(throwable())) { 2127 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2128 } 2129 2130 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2131 BacktraceIterator iter(result, THREAD); 2132 2133 int index = 0; 2134 while (iter.repeat()) { 2135 BacktraceElement bte = iter.next(THREAD); 2136 2137 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2138 2139 if (stack_trace_element.is_null()) { 2140 THROW(vmSymbols::java_lang_NullPointerException()); 2141 } 2142 2143 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2144 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2145 2146 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2147 method, 2148 bte._version, 2149 bte._bci, 2150 bte._name, CHECK); 2151 } 2152 } 2153 2154 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2155 // Allocate java.lang.StackTraceElement instance 2156 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2157 assert(k != NULL, "must be loaded in 1.4+"); 2158 if (k->should_be_initialized()) { 2159 k->initialize(CHECK_0); 2160 } 2161 2162 Handle element = k->allocate_instance_handle(CHECK_0); 2163 2164 int version = method->constants()->version(); 2165 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2166 return element(); 2167 } 2168 2169 void java_lang_StackTraceElement::fill_in(Handle element, 2170 InstanceKlass* holder, const methodHandle& method, 2171 int version, int bci, Symbol* name, TRAPS) { 2172 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2173 2174 // Fill in class name 2175 ResourceMark rm(THREAD); 2176 const char* str = holder->external_name(); 2177 oop classname = StringTable::intern((char*) str, CHECK); 2178 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2179 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2180 2181 oop loader = holder->class_loader(); 2182 if (loader != NULL) { 2183 oop loader_name = java_lang_ClassLoader::name(loader); 2184 if (loader_name != NULL) 2185 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2186 } 2187 2188 // Fill in method name 2189 oop methodname = StringTable::intern(name, CHECK); 2190 java_lang_StackTraceElement::set_methodName(element(), methodname); 2191 2192 // Fill in module name and version 2193 ModuleEntry* module = holder->module(); 2194 if (module->is_named()) { 2195 oop module_name = StringTable::intern(module->name(), CHECK); 2196 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2197 oop module_version; 2198 if (module->version() != NULL) { 2199 module_version = StringTable::intern(module->version(), CHECK); 2200 } else { 2201 module_version = NULL; 2202 } 2203 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2204 } 2205 2206 if (method() == NULL || !version_matches(method(), version)) { 2207 // The method was redefined, accurate line number information isn't available 2208 java_lang_StackTraceElement::set_fileName(element(), NULL); 2209 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2210 } else { 2211 // Fill in source file name and line number. 2212 Symbol* source = Backtrace::get_source_file_name(holder, version); 2213 if (ShowHiddenFrames && source == NULL) 2214 source = vmSymbols::unknown_class_name(); 2215 oop filename = StringTable::intern(source, CHECK); 2216 java_lang_StackTraceElement::set_fileName(element(), filename); 2217 2218 int line_number = Backtrace::get_line_number(method, bci); 2219 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2220 } 2221 } 2222 2223 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2224 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2225 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2226 // we should expand MemberName::name when Throwable uses StackTrace 2227 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2228 return method; 2229 } 2230 2231 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2232 // set Method* or mid/cpref 2233 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2234 InstanceKlass* ik = method->method_holder(); 2235 CallInfo info(method(), ik); 2236 MethodHandles::init_method_MemberName(mname, info); 2237 // set bci 2238 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2239 // method may be redefined; store the version 2240 int version = method->constants()->version(); 2241 assert((jushort)version == version, "version should be short"); 2242 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2243 } 2244 2245 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2246 ResourceMark rm(THREAD); 2247 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2248 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2249 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2250 2251 short version = stackFrame->short_field(_version_offset); 2252 short bci = stackFrame->short_field(_bci_offset); 2253 Symbol* name = method->name(); 2254 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2255 } 2256 2257 void java_lang_StackFrameInfo::compute_offsets() { 2258 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2259 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2260 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2261 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2262 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2263 } 2264 2265 void java_lang_LiveStackFrameInfo::compute_offsets() { 2266 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2267 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2268 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2269 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2270 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature()); 2271 } 2272 2273 void java_lang_reflect_AccessibleObject::compute_offsets() { 2274 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2275 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2276 } 2277 2278 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2280 return (jboolean) reflect->bool_field(override_offset); 2281 } 2282 2283 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2285 reflect->bool_field_put(override_offset, (int) value); 2286 } 2287 2288 void java_lang_reflect_Method::compute_offsets() { 2289 Klass* k = SystemDictionary::reflect_Method_klass(); 2290 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2291 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2292 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2293 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2294 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2295 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2296 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2297 // The generic signature and annotations fields are only present in 1.5 2298 signature_offset = -1; 2299 annotations_offset = -1; 2300 parameter_annotations_offset = -1; 2301 annotation_default_offset = -1; 2302 type_annotations_offset = -1; 2303 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2304 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2305 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2306 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2307 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2308 } 2309 2310 Handle java_lang_reflect_Method::create(TRAPS) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 Klass* klass = SystemDictionary::reflect_Method_klass(); 2313 // This class is eagerly initialized during VM initialization, since we keep a refence 2314 // to one of the methods 2315 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2316 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2317 } 2318 2319 oop java_lang_reflect_Method::clazz(oop reflect) { 2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2321 return reflect->obj_field(clazz_offset); 2322 } 2323 2324 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2326 reflect->obj_field_put(clazz_offset, value); 2327 } 2328 2329 int java_lang_reflect_Method::slot(oop reflect) { 2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2331 return reflect->int_field(slot_offset); 2332 } 2333 2334 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2336 reflect->int_field_put(slot_offset, value); 2337 } 2338 2339 oop java_lang_reflect_Method::name(oop method) { 2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2341 return method->obj_field(name_offset); 2342 } 2343 2344 void java_lang_reflect_Method::set_name(oop method, oop value) { 2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2346 method->obj_field_put(name_offset, value); 2347 } 2348 2349 oop java_lang_reflect_Method::return_type(oop method) { 2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2351 return method->obj_field(returnType_offset); 2352 } 2353 2354 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2356 method->obj_field_put(returnType_offset, value); 2357 } 2358 2359 oop java_lang_reflect_Method::parameter_types(oop method) { 2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2361 return method->obj_field(parameterTypes_offset); 2362 } 2363 2364 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2366 method->obj_field_put(parameterTypes_offset, value); 2367 } 2368 2369 oop java_lang_reflect_Method::exception_types(oop method) { 2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2371 return method->obj_field(exceptionTypes_offset); 2372 } 2373 2374 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2376 method->obj_field_put(exceptionTypes_offset, value); 2377 } 2378 2379 int java_lang_reflect_Method::modifiers(oop method) { 2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2381 return method->int_field(modifiers_offset); 2382 } 2383 2384 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2386 method->int_field_put(modifiers_offset, value); 2387 } 2388 2389 bool java_lang_reflect_Method::has_signature_field() { 2390 return (signature_offset >= 0); 2391 } 2392 2393 oop java_lang_reflect_Method::signature(oop method) { 2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2395 assert(has_signature_field(), "signature field must be present"); 2396 return method->obj_field(signature_offset); 2397 } 2398 2399 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2400 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2401 assert(has_signature_field(), "signature field must be present"); 2402 method->obj_field_put(signature_offset, value); 2403 } 2404 2405 bool java_lang_reflect_Method::has_annotations_field() { 2406 return (annotations_offset >= 0); 2407 } 2408 2409 oop java_lang_reflect_Method::annotations(oop method) { 2410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2411 assert(has_annotations_field(), "annotations field must be present"); 2412 return method->obj_field(annotations_offset); 2413 } 2414 2415 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2417 assert(has_annotations_field(), "annotations field must be present"); 2418 method->obj_field_put(annotations_offset, value); 2419 } 2420 2421 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2422 return (parameter_annotations_offset >= 0); 2423 } 2424 2425 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2426 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2427 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2428 return method->obj_field(parameter_annotations_offset); 2429 } 2430 2431 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2432 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2433 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2434 method->obj_field_put(parameter_annotations_offset, value); 2435 } 2436 2437 bool java_lang_reflect_Method::has_annotation_default_field() { 2438 return (annotation_default_offset >= 0); 2439 } 2440 2441 oop java_lang_reflect_Method::annotation_default(oop method) { 2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2443 assert(has_annotation_default_field(), "annotation default field must be present"); 2444 return method->obj_field(annotation_default_offset); 2445 } 2446 2447 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2448 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2449 assert(has_annotation_default_field(), "annotation default field must be present"); 2450 method->obj_field_put(annotation_default_offset, value); 2451 } 2452 2453 bool java_lang_reflect_Method::has_type_annotations_field() { 2454 return (type_annotations_offset >= 0); 2455 } 2456 2457 oop java_lang_reflect_Method::type_annotations(oop method) { 2458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2459 assert(has_type_annotations_field(), "type_annotations field must be present"); 2460 return method->obj_field(type_annotations_offset); 2461 } 2462 2463 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2465 assert(has_type_annotations_field(), "type_annotations field must be present"); 2466 method->obj_field_put(type_annotations_offset, value); 2467 } 2468 2469 void java_lang_reflect_Constructor::compute_offsets() { 2470 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2471 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2472 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2473 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2474 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2475 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2476 // The generic signature and annotations fields are only present in 1.5 2477 signature_offset = -1; 2478 annotations_offset = -1; 2479 parameter_annotations_offset = -1; 2480 type_annotations_offset = -1; 2481 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2482 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2483 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2484 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2485 } 2486 2487 Handle java_lang_reflect_Constructor::create(TRAPS) { 2488 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2489 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2490 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2491 InstanceKlass* ik = InstanceKlass::cast(k); 2492 // Ensure it is initialized 2493 ik->initialize(CHECK_NH); 2494 return ik->allocate_instance_handle(THREAD); 2495 } 2496 2497 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2498 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2499 return reflect->obj_field(clazz_offset); 2500 } 2501 2502 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2504 reflect->obj_field_put(clazz_offset, value); 2505 } 2506 2507 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2508 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2509 return constructor->obj_field(parameterTypes_offset); 2510 } 2511 2512 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2513 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2514 constructor->obj_field_put(parameterTypes_offset, value); 2515 } 2516 2517 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2518 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2519 return constructor->obj_field(exceptionTypes_offset); 2520 } 2521 2522 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2523 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2524 constructor->obj_field_put(exceptionTypes_offset, value); 2525 } 2526 2527 int java_lang_reflect_Constructor::slot(oop reflect) { 2528 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2529 return reflect->int_field(slot_offset); 2530 } 2531 2532 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2533 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2534 reflect->int_field_put(slot_offset, value); 2535 } 2536 2537 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2538 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2539 return constructor->int_field(modifiers_offset); 2540 } 2541 2542 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2543 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2544 constructor->int_field_put(modifiers_offset, value); 2545 } 2546 2547 bool java_lang_reflect_Constructor::has_signature_field() { 2548 return (signature_offset >= 0); 2549 } 2550 2551 oop java_lang_reflect_Constructor::signature(oop constructor) { 2552 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2553 assert(has_signature_field(), "signature field must be present"); 2554 return constructor->obj_field(signature_offset); 2555 } 2556 2557 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2558 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2559 assert(has_signature_field(), "signature field must be present"); 2560 constructor->obj_field_put(signature_offset, value); 2561 } 2562 2563 bool java_lang_reflect_Constructor::has_annotations_field() { 2564 return (annotations_offset >= 0); 2565 } 2566 2567 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2568 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2569 assert(has_annotations_field(), "annotations field must be present"); 2570 return constructor->obj_field(annotations_offset); 2571 } 2572 2573 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2574 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2575 assert(has_annotations_field(), "annotations field must be present"); 2576 constructor->obj_field_put(annotations_offset, value); 2577 } 2578 2579 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2580 return (parameter_annotations_offset >= 0); 2581 } 2582 2583 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2584 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2585 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2586 return method->obj_field(parameter_annotations_offset); 2587 } 2588 2589 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2591 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2592 method->obj_field_put(parameter_annotations_offset, value); 2593 } 2594 2595 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2596 return (type_annotations_offset >= 0); 2597 } 2598 2599 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2601 assert(has_type_annotations_field(), "type_annotations field must be present"); 2602 return constructor->obj_field(type_annotations_offset); 2603 } 2604 2605 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2606 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2607 assert(has_type_annotations_field(), "type_annotations field must be present"); 2608 constructor->obj_field_put(type_annotations_offset, value); 2609 } 2610 2611 void java_lang_reflect_Field::compute_offsets() { 2612 Klass* k = SystemDictionary::reflect_Field_klass(); 2613 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2614 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2615 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2616 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2617 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2618 // The generic signature and annotations fields are only present in 1.5 2619 signature_offset = -1; 2620 annotations_offset = -1; 2621 type_annotations_offset = -1; 2622 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2623 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2624 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2625 } 2626 2627 Handle java_lang_reflect_Field::create(TRAPS) { 2628 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2629 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2630 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2631 InstanceKlass* ik = InstanceKlass::cast(k); 2632 // Ensure it is initialized 2633 ik->initialize(CHECK_NH); 2634 return ik->allocate_instance_handle(THREAD); 2635 } 2636 2637 oop java_lang_reflect_Field::clazz(oop reflect) { 2638 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2639 return reflect->obj_field(clazz_offset); 2640 } 2641 2642 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2643 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2644 reflect->obj_field_put(clazz_offset, value); 2645 } 2646 2647 oop java_lang_reflect_Field::name(oop field) { 2648 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2649 return field->obj_field(name_offset); 2650 } 2651 2652 void java_lang_reflect_Field::set_name(oop field, oop value) { 2653 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2654 field->obj_field_put(name_offset, value); 2655 } 2656 2657 oop java_lang_reflect_Field::type(oop field) { 2658 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2659 return field->obj_field(type_offset); 2660 } 2661 2662 void java_lang_reflect_Field::set_type(oop field, oop value) { 2663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2664 field->obj_field_put(type_offset, value); 2665 } 2666 2667 int java_lang_reflect_Field::slot(oop reflect) { 2668 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2669 return reflect->int_field(slot_offset); 2670 } 2671 2672 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2674 reflect->int_field_put(slot_offset, value); 2675 } 2676 2677 int java_lang_reflect_Field::modifiers(oop field) { 2678 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2679 return field->int_field(modifiers_offset); 2680 } 2681 2682 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2683 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2684 field->int_field_put(modifiers_offset, value); 2685 } 2686 2687 bool java_lang_reflect_Field::has_signature_field() { 2688 return (signature_offset >= 0); 2689 } 2690 2691 oop java_lang_reflect_Field::signature(oop field) { 2692 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2693 assert(has_signature_field(), "signature field must be present"); 2694 return field->obj_field(signature_offset); 2695 } 2696 2697 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2698 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2699 assert(has_signature_field(), "signature field must be present"); 2700 field->obj_field_put(signature_offset, value); 2701 } 2702 2703 bool java_lang_reflect_Field::has_annotations_field() { 2704 return (annotations_offset >= 0); 2705 } 2706 2707 oop java_lang_reflect_Field::annotations(oop field) { 2708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2709 assert(has_annotations_field(), "annotations field must be present"); 2710 return field->obj_field(annotations_offset); 2711 } 2712 2713 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2714 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2715 assert(has_annotations_field(), "annotations field must be present"); 2716 field->obj_field_put(annotations_offset, value); 2717 } 2718 2719 bool java_lang_reflect_Field::has_type_annotations_field() { 2720 return (type_annotations_offset >= 0); 2721 } 2722 2723 oop java_lang_reflect_Field::type_annotations(oop field) { 2724 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2725 assert(has_type_annotations_field(), "type_annotations field must be present"); 2726 return field->obj_field(type_annotations_offset); 2727 } 2728 2729 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2731 assert(has_type_annotations_field(), "type_annotations field must be present"); 2732 field->obj_field_put(type_annotations_offset, value); 2733 } 2734 2735 void reflect_ConstantPool::compute_offsets() { 2736 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2737 // This null test can be removed post beta 2738 if (k != NULL) { 2739 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2740 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2741 } 2742 } 2743 2744 void java_lang_reflect_Parameter::compute_offsets() { 2745 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2746 if(NULL != k) { 2747 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2748 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2749 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2750 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2751 } 2752 } 2753 2754 Handle java_lang_reflect_Parameter::create(TRAPS) { 2755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2756 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2757 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2758 InstanceKlass* ik = InstanceKlass::cast(k); 2759 // Ensure it is initialized 2760 ik->initialize(CHECK_NH); 2761 return ik->allocate_instance_handle(THREAD); 2762 } 2763 2764 oop java_lang_reflect_Parameter::name(oop param) { 2765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2766 return param->obj_field(name_offset); 2767 } 2768 2769 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2771 param->obj_field_put(name_offset, value); 2772 } 2773 2774 int java_lang_reflect_Parameter::modifiers(oop param) { 2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2776 return param->int_field(modifiers_offset); 2777 } 2778 2779 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2781 param->int_field_put(modifiers_offset, value); 2782 } 2783 2784 int java_lang_reflect_Parameter::index(oop param) { 2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2786 return param->int_field(index_offset); 2787 } 2788 2789 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2791 param->int_field_put(index_offset, value); 2792 } 2793 2794 oop java_lang_reflect_Parameter::executable(oop param) { 2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2796 return param->obj_field(executable_offset); 2797 } 2798 2799 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2801 param->obj_field_put(executable_offset, value); 2802 } 2803 2804 2805 int java_lang_reflect_Module::loader_offset; 2806 int java_lang_reflect_Module::name_offset; 2807 int java_lang_reflect_Module::_module_entry_offset = -1; 2808 2809 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) { 2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2811 2812 Symbol* name = vmSymbols::java_lang_reflect_Module(); 2813 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2814 InstanceKlass* ik = InstanceKlass::cast(k); 2815 Handle jlrmh = ik->allocate_instance_handle(CHECK_NH); 2816 JavaValue result(T_VOID); 2817 JavaCalls::call_special(&result, jlrmh, ik, 2818 vmSymbols::object_initializer_name(), 2819 vmSymbols::java_lang_reflect_module_init_signature(), 2820 loader, module_name, CHECK_NH); 2821 return jlrmh; 2822 } 2823 2824 void java_lang_reflect_Module::compute_offsets() { 2825 Klass* k = SystemDictionary::reflect_Module_klass(); 2826 if(NULL != k) { 2827 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2828 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2829 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2830 } 2831 } 2832 2833 2834 oop java_lang_reflect_Module::loader(oop module) { 2835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2836 return module->obj_field(loader_offset); 2837 } 2838 2839 void java_lang_reflect_Module::set_loader(oop module, oop value) { 2840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2841 module->obj_field_put(loader_offset, value); 2842 } 2843 2844 oop java_lang_reflect_Module::name(oop module) { 2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2846 return module->obj_field(name_offset); 2847 } 2848 2849 void java_lang_reflect_Module::set_name(oop module, oop value) { 2850 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2851 module->obj_field_put(name_offset, value); 2852 } 2853 2854 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) { 2855 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2856 assert(module != NULL, "module can't be null"); 2857 assert(module->is_oop(), "module must be oop"); 2858 2859 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2860 if (module_entry == NULL) { 2861 // If the inject field containing the ModuleEntry* is null then return the 2862 // class loader's unnamed module. 2863 oop loader = java_lang_reflect_Module::loader(module); 2864 Handle h_loader = Handle(THREAD, loader); 2865 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2866 return loader_cld->modules()->unnamed_module(); 2867 } 2868 return module_entry; 2869 } 2870 2871 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2872 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2873 assert(module != NULL, "module can't be null"); 2874 assert(module->is_oop(), "module must be oop"); 2875 module->address_field_put(_module_entry_offset, (address)module_entry); 2876 } 2877 2878 Handle reflect_ConstantPool::create(TRAPS) { 2879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2880 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 2881 // Ensure it is initialized 2882 k->initialize(CHECK_NH); 2883 return k->allocate_instance_handle(THREAD); 2884 } 2885 2886 2887 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2888 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2889 oop mirror = value->pool_holder()->java_mirror(); 2890 // Save the mirror to get back the constant pool. 2891 reflect->obj_field_put(_oop_offset, mirror); 2892 } 2893 2894 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2896 2897 oop mirror = reflect->obj_field(_oop_offset); 2898 Klass* k = java_lang_Class::as_Klass(mirror); 2899 assert(k->is_instance_klass(), "Must be"); 2900 2901 // Get the constant pool back from the klass. Since class redefinition 2902 // merges the new constant pool into the old, this is essentially the 2903 // same constant pool as the original. If constant pool merging is 2904 // no longer done in the future, this will have to change to save 2905 // the original. 2906 return InstanceKlass::cast(k)->constants(); 2907 } 2908 2909 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2910 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2911 // This null test can be removed post beta 2912 if (k != NULL) { 2913 compute_offset(_base_offset, k, 2914 vmSymbols::base_name(), vmSymbols::object_signature()); 2915 } 2916 } 2917 2918 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2919 Klass* k = SystemDictionary::box_klass(type); 2920 if (k == NULL) return NULL; 2921 InstanceKlass* ik = InstanceKlass::cast(k); 2922 if (!ik->is_initialized()) ik->initialize(CHECK_0); 2923 return ik->allocate_instance(THREAD); 2924 } 2925 2926 2927 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2928 oop box = initialize_and_allocate(type, CHECK_0); 2929 if (box == NULL) return NULL; 2930 switch (type) { 2931 case T_BOOLEAN: 2932 box->bool_field_put(value_offset, value->z); 2933 break; 2934 case T_CHAR: 2935 box->char_field_put(value_offset, value->c); 2936 break; 2937 case T_FLOAT: 2938 box->float_field_put(value_offset, value->f); 2939 break; 2940 case T_DOUBLE: 2941 box->double_field_put(long_value_offset, value->d); 2942 break; 2943 case T_BYTE: 2944 box->byte_field_put(value_offset, value->b); 2945 break; 2946 case T_SHORT: 2947 box->short_field_put(value_offset, value->s); 2948 break; 2949 case T_INT: 2950 box->int_field_put(value_offset, value->i); 2951 break; 2952 case T_LONG: 2953 box->long_field_put(long_value_offset, value->j); 2954 break; 2955 default: 2956 return NULL; 2957 } 2958 return box; 2959 } 2960 2961 2962 BasicType java_lang_boxing_object::basic_type(oop box) { 2963 if (box == NULL) return T_ILLEGAL; 2964 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2965 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2966 return T_ILLEGAL; 2967 return type; 2968 } 2969 2970 2971 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2972 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2973 switch (type) { 2974 case T_BOOLEAN: 2975 value->z = box->bool_field(value_offset); 2976 break; 2977 case T_CHAR: 2978 value->c = box->char_field(value_offset); 2979 break; 2980 case T_FLOAT: 2981 value->f = box->float_field(value_offset); 2982 break; 2983 case T_DOUBLE: 2984 value->d = box->double_field(long_value_offset); 2985 break; 2986 case T_BYTE: 2987 value->b = box->byte_field(value_offset); 2988 break; 2989 case T_SHORT: 2990 value->s = box->short_field(value_offset); 2991 break; 2992 case T_INT: 2993 value->i = box->int_field(value_offset); 2994 break; 2995 case T_LONG: 2996 value->j = box->long_field(long_value_offset); 2997 break; 2998 default: 2999 return T_ILLEGAL; 3000 } // end switch 3001 return type; 3002 } 3003 3004 3005 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3006 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3007 switch (type) { 3008 case T_BOOLEAN: 3009 box->bool_field_put(value_offset, value->z); 3010 break; 3011 case T_CHAR: 3012 box->char_field_put(value_offset, value->c); 3013 break; 3014 case T_FLOAT: 3015 box->float_field_put(value_offset, value->f); 3016 break; 3017 case T_DOUBLE: 3018 box->double_field_put(long_value_offset, value->d); 3019 break; 3020 case T_BYTE: 3021 box->byte_field_put(value_offset, value->b); 3022 break; 3023 case T_SHORT: 3024 box->short_field_put(value_offset, value->s); 3025 break; 3026 case T_INT: 3027 box->int_field_put(value_offset, value->i); 3028 break; 3029 case T_LONG: 3030 box->long_field_put(long_value_offset, value->j); 3031 break; 3032 default: 3033 return T_ILLEGAL; 3034 } // end switch 3035 return type; 3036 } 3037 3038 3039 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3040 switch (type) { 3041 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3042 case T_CHAR: st->print("%d", value->c); break; 3043 case T_BYTE: st->print("%d", value->b); break; 3044 case T_SHORT: st->print("%d", value->s); break; 3045 case T_INT: st->print("%d", value->i); break; 3046 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3047 case T_FLOAT: st->print("%f", value->f); break; 3048 case T_DOUBLE: st->print("%lf", value->d); break; 3049 default: st->print("type %d?", type); break; 3050 } 3051 } 3052 3053 // Support for java_lang_ref_SoftReference 3054 3055 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3056 return ref->long_field(timestamp_offset); 3057 } 3058 3059 jlong java_lang_ref_SoftReference::clock() { 3060 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3061 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3062 return *offset; 3063 } 3064 3065 void java_lang_ref_SoftReference::set_clock(jlong value) { 3066 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3067 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3068 *offset = value; 3069 } 3070 3071 // Support for java_lang_invoke_DirectMethodHandle 3072 3073 int java_lang_invoke_DirectMethodHandle::_member_offset; 3074 3075 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3076 oop member_name = NULL; 3077 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3078 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3079 if (is_dmh) { 3080 member_name = dmh->obj_field(member_offset_in_bytes()); 3081 } 3082 return member_name; 3083 } 3084 3085 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3086 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3087 if (klass_oop != NULL) { 3088 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3089 } 3090 } 3091 3092 // Support for java_lang_invoke_MethodHandle 3093 3094 int java_lang_invoke_MethodHandle::_type_offset; 3095 int java_lang_invoke_MethodHandle::_form_offset; 3096 3097 int java_lang_invoke_MemberName::_clazz_offset; 3098 int java_lang_invoke_MemberName::_name_offset; 3099 int java_lang_invoke_MemberName::_type_offset; 3100 int java_lang_invoke_MemberName::_flags_offset; 3101 int java_lang_invoke_MemberName::_vmtarget_offset; 3102 int java_lang_invoke_MemberName::_vmloader_offset; 3103 int java_lang_invoke_MemberName::_vmindex_offset; 3104 3105 int java_lang_invoke_LambdaForm::_vmentry_offset; 3106 3107 void java_lang_invoke_MethodHandle::compute_offsets() { 3108 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3109 if (klass_oop != NULL) { 3110 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3111 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3112 } 3113 } 3114 3115 void java_lang_invoke_MemberName::compute_offsets() { 3116 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3117 if (klass_oop != NULL) { 3118 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3119 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3120 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3121 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3122 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3123 } 3124 } 3125 3126 void java_lang_invoke_LambdaForm::compute_offsets() { 3127 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3128 if (klass_oop != NULL) { 3129 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3130 } 3131 } 3132 3133 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3134 return obj != NULL && is_subclass(obj->klass()); 3135 } 3136 3137 3138 oop java_lang_invoke_MethodHandle::type(oop mh) { 3139 return mh->obj_field(_type_offset); 3140 } 3141 3142 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3143 mh->obj_field_put(_type_offset, mtype); 3144 } 3145 3146 oop java_lang_invoke_MethodHandle::form(oop mh) { 3147 assert(_form_offset != 0, ""); 3148 return mh->obj_field(_form_offset); 3149 } 3150 3151 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3152 assert(_form_offset != 0, ""); 3153 mh->obj_field_put(_form_offset, lform); 3154 } 3155 3156 /// MemberName accessors 3157 3158 oop java_lang_invoke_MemberName::clazz(oop mname) { 3159 assert(is_instance(mname), "wrong type"); 3160 return mname->obj_field(_clazz_offset); 3161 } 3162 3163 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3164 assert(is_instance(mname), "wrong type"); 3165 mname->obj_field_put(_clazz_offset, clazz); 3166 } 3167 3168 oop java_lang_invoke_MemberName::name(oop mname) { 3169 assert(is_instance(mname), "wrong type"); 3170 return mname->obj_field(_name_offset); 3171 } 3172 3173 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3174 assert(is_instance(mname), "wrong type"); 3175 mname->obj_field_put(_name_offset, name); 3176 } 3177 3178 oop java_lang_invoke_MemberName::type(oop mname) { 3179 assert(is_instance(mname), "wrong type"); 3180 return mname->obj_field(_type_offset); 3181 } 3182 3183 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3184 assert(is_instance(mname), "wrong type"); 3185 mname->obj_field_put(_type_offset, type); 3186 } 3187 3188 int java_lang_invoke_MemberName::flags(oop mname) { 3189 assert(is_instance(mname), "wrong type"); 3190 return mname->int_field(_flags_offset); 3191 } 3192 3193 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3194 assert(is_instance(mname), "wrong type"); 3195 mname->int_field_put(_flags_offset, flags); 3196 } 3197 3198 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3199 assert(is_instance(mname), "wrong type"); 3200 return (Metadata*)mname->address_field(_vmtarget_offset); 3201 } 3202 3203 bool java_lang_invoke_MemberName::is_method(oop mname) { 3204 assert(is_instance(mname), "must be MemberName"); 3205 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3206 } 3207 3208 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3209 assert(is_instance(mname), "wrong type"); 3210 // check the type of the vmtarget 3211 oop dependency = NULL; 3212 if (ref != NULL) { 3213 switch (flags(mname) & (MN_IS_METHOD | 3214 MN_IS_CONSTRUCTOR | 3215 MN_IS_FIELD)) { 3216 case MN_IS_METHOD: 3217 case MN_IS_CONSTRUCTOR: 3218 assert(ref->is_method(), "should be a method"); 3219 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3220 break; 3221 case MN_IS_FIELD: 3222 assert(ref->is_klass(), "should be a class"); 3223 dependency = ((Klass*)ref)->java_mirror(); 3224 break; 3225 default: 3226 ShouldNotReachHere(); 3227 } 3228 } 3229 mname->address_field_put(_vmtarget_offset, (address)ref); 3230 // Add a reference to the loader (actually mirror because anonymous classes will not have 3231 // distinct loaders) to ensure the metadata is kept alive 3232 // This mirror may be different than the one in clazz field. 3233 mname->obj_field_put(_vmloader_offset, dependency); 3234 } 3235 3236 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3237 assert(is_instance(mname), "wrong type"); 3238 return (intptr_t) mname->address_field(_vmindex_offset); 3239 } 3240 3241 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3242 assert(is_instance(mname), "wrong type"); 3243 mname->address_field_put(_vmindex_offset, (address) index); 3244 } 3245 3246 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) { 3247 if (mn1 == mn2) { 3248 return true; 3249 } 3250 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) && 3251 vmindex(mn1) == vmindex(mn2) && 3252 clazz(mn1) == clazz(mn2)); 3253 } 3254 3255 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3256 assert(is_instance(lform), "wrong type"); 3257 return lform->obj_field(_vmentry_offset); 3258 } 3259 3260 3261 // Support for java_lang_invoke_MethodType 3262 3263 int java_lang_invoke_MethodType::_rtype_offset; 3264 int java_lang_invoke_MethodType::_ptypes_offset; 3265 3266 void java_lang_invoke_MethodType::compute_offsets() { 3267 Klass* k = SystemDictionary::MethodType_klass(); 3268 if (k != NULL) { 3269 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3270 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3271 } 3272 } 3273 3274 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3275 st->print("("); 3276 objArrayOop pts = ptypes(mt); 3277 for (int i = 0, limit = pts->length(); i < limit; i++) { 3278 java_lang_Class::print_signature(pts->obj_at(i), st); 3279 } 3280 st->print(")"); 3281 java_lang_Class::print_signature(rtype(mt), st); 3282 } 3283 3284 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3285 ResourceMark rm; 3286 stringStream buffer(128); 3287 print_signature(mt, &buffer); 3288 const char* sigstr = buffer.base(); 3289 int siglen = (int) buffer.size(); 3290 Symbol *name; 3291 if (!intern_if_not_found) { 3292 name = SymbolTable::probe(sigstr, siglen); 3293 } else { 3294 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3295 } 3296 return name; 3297 } 3298 3299 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3300 if (mt1 == mt2) 3301 return true; 3302 if (rtype(mt1) != rtype(mt2)) 3303 return false; 3304 if (ptype_count(mt1) != ptype_count(mt2)) 3305 return false; 3306 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3307 if (ptype(mt1, i) != ptype(mt2, i)) 3308 return false; 3309 } 3310 return true; 3311 } 3312 3313 oop java_lang_invoke_MethodType::rtype(oop mt) { 3314 assert(is_instance(mt), "must be a MethodType"); 3315 return mt->obj_field(_rtype_offset); 3316 } 3317 3318 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3319 assert(is_instance(mt), "must be a MethodType"); 3320 return (objArrayOop) mt->obj_field(_ptypes_offset); 3321 } 3322 3323 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3324 return ptypes(mt)->obj_at(idx); 3325 } 3326 3327 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3328 return ptypes(mt)->length(); 3329 } 3330 3331 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3332 objArrayOop pts = ptypes(mt); 3333 int count = pts->length(); 3334 int slots = 0; 3335 for (int i = 0; i < count; i++) { 3336 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3337 slots += type2size[bt]; 3338 } 3339 return slots; 3340 } 3341 3342 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3343 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3344 return type2size[bt]; 3345 } 3346 3347 3348 // Support for java_lang_invoke_CallSite 3349 3350 int java_lang_invoke_CallSite::_target_offset; 3351 int java_lang_invoke_CallSite::_context_offset; 3352 3353 void java_lang_invoke_CallSite::compute_offsets() { 3354 Klass* k = SystemDictionary::CallSite_klass(); 3355 if (k != NULL) { 3356 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3357 compute_offset(_context_offset, k, vmSymbols::context_name(), 3358 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3359 } 3360 } 3361 3362 oop java_lang_invoke_CallSite::context(oop call_site) { 3363 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3364 3365 oop dep_oop = call_site->obj_field(_context_offset); 3366 return dep_oop; 3367 } 3368 3369 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3370 3371 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3372 3373 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3374 Klass* k = SystemDictionary::Context_klass(); 3375 if (k != NULL) { 3376 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3377 } 3378 } 3379 3380 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3381 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3382 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3383 DependencyContext dep_ctx(vmdeps_addr); 3384 return dep_ctx; 3385 } 3386 3387 // Support for java_security_AccessControlContext 3388 3389 int java_security_AccessControlContext::_context_offset = 0; 3390 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3391 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3392 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3393 3394 void java_security_AccessControlContext::compute_offsets() { 3395 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3396 fieldDescriptor fd; 3397 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3398 3399 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3400 fatal("Invalid layout of java.security.AccessControlContext"); 3401 } 3402 _context_offset = fd.offset(); 3403 3404 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3405 fatal("Invalid layout of java.security.AccessControlContext"); 3406 } 3407 _privilegedContext_offset = fd.offset(); 3408 3409 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3410 fatal("Invalid layout of java.security.AccessControlContext"); 3411 } 3412 _isPrivileged_offset = fd.offset(); 3413 3414 // The offset may not be present for bootstrapping with older JDK. 3415 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3416 _isAuthorized_offset = fd.offset(); 3417 } 3418 } 3419 3420 3421 bool java_security_AccessControlContext::is_authorized(Handle context) { 3422 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3423 assert(_isAuthorized_offset != -1, "should be set"); 3424 return context->bool_field(_isAuthorized_offset) != 0; 3425 } 3426 3427 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3428 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3429 // Ensure klass is initialized 3430 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3431 // Allocate result 3432 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3433 // Fill in values 3434 result->obj_field_put(_context_offset, context()); 3435 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3436 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3437 // whitelist AccessControlContexts created by the JVM if present 3438 if (_isAuthorized_offset != -1) { 3439 result->bool_field_put(_isAuthorized_offset, true); 3440 } 3441 return result; 3442 } 3443 3444 3445 // Support for java_lang_ClassLoader 3446 3447 bool java_lang_ClassLoader::offsets_computed = false; 3448 int java_lang_ClassLoader::_loader_data_offset = -1; 3449 int java_lang_ClassLoader::parallelCapable_offset = -1; 3450 int java_lang_ClassLoader::name_offset = -1; 3451 int java_lang_ClassLoader::unnamedModule_offset = -1; 3452 3453 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3454 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3455 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3456 } 3457 3458 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3459 return *java_lang_ClassLoader::loader_data_addr(loader); 3460 } 3461 3462 void java_lang_ClassLoader::compute_offsets() { 3463 assert(!offsets_computed, "offsets should be initialized only once"); 3464 offsets_computed = true; 3465 3466 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3467 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3468 compute_optional_offset(parallelCapable_offset, 3469 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3470 3471 compute_offset(name_offset, 3472 k1, vmSymbols::name_name(), vmSymbols::string_signature()); 3473 3474 compute_offset(unnamedModule_offset, 3475 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3476 3477 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3478 } 3479 3480 oop java_lang_ClassLoader::parent(oop loader) { 3481 assert(is_instance(loader), "loader must be oop"); 3482 return loader->obj_field(parent_offset); 3483 } 3484 3485 oop java_lang_ClassLoader::name(oop loader) { 3486 assert(is_instance(loader), "loader must be oop"); 3487 return loader->obj_field(name_offset); 3488 } 3489 3490 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3491 assert(is_instance(loader), "loader must be oop"); 3492 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3493 oop acl = loader; 3494 debug_only(jint loop_count = 0); 3495 // This loop taken verbatim from ClassLoader.java: 3496 do { 3497 acl = parent(acl); 3498 if (cl == acl) { 3499 return true; 3500 } 3501 assert(++loop_count > 0, "loop_count overflow"); 3502 } while (acl != NULL); 3503 return false; 3504 } 3505 3506 bool java_lang_ClassLoader::is_instance(oop obj) { 3507 return obj != NULL && is_subclass(obj->klass()); 3508 } 3509 3510 3511 // For class loader classes, parallelCapable defined 3512 // based on non-null field 3513 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3514 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3515 if (parallelCapable_offset == -1) { 3516 // Default for backward compatibility is false 3517 return false; 3518 } 3519 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3520 } 3521 3522 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3523 // Fix for 4474172; see evaluation for more details 3524 loader = non_reflection_class_loader(loader); 3525 3526 oop cl = SystemDictionary::java_system_loader(); 3527 while(cl != NULL) { 3528 if (cl == loader) return true; 3529 cl = parent(cl); 3530 } 3531 return false; 3532 } 3533 3534 // Return true if this is one of the class loaders associated with 3535 // the generated bytecodes for reflection. 3536 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3537 if (loader != NULL) { 3538 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3539 // This might be null in non-1.4 JDKs 3540 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3541 } 3542 return false; 3543 } 3544 3545 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3546 // See whether this is one of the class loaders associated with 3547 // the generated bytecodes for reflection, and if so, "magically" 3548 // delegate to its parent to prevent class loading from occurring 3549 // in places where applications using reflection didn't expect it. 3550 if (is_reflection_class_loader(loader)) { 3551 return parent(loader); 3552 } 3553 return loader; 3554 } 3555 3556 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3557 assert(is_instance(loader), "loader must be oop"); 3558 return loader->obj_field(unnamedModule_offset); 3559 } 3560 3561 // Support for java_lang_System 3562 int java_lang_System::in_offset_in_bytes() { 3563 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3564 } 3565 3566 3567 int java_lang_System::out_offset_in_bytes() { 3568 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3569 } 3570 3571 3572 int java_lang_System::err_offset_in_bytes() { 3573 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3574 } 3575 3576 3577 bool java_lang_System::has_security_manager() { 3578 InstanceKlass* ik = SystemDictionary::System_klass(); 3579 address addr = ik->static_field_addr(static_security_offset); 3580 if (UseCompressedOops) { 3581 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3582 } else { 3583 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3584 } 3585 } 3586 3587 int java_lang_Class::_klass_offset; 3588 int java_lang_Class::_array_klass_offset; 3589 int java_lang_Class::_oop_size_offset; 3590 int java_lang_Class::_static_oop_field_count_offset; 3591 int java_lang_Class::_class_loader_offset; 3592 int java_lang_Class::_module_offset; 3593 int java_lang_Class::_protection_domain_offset; 3594 int java_lang_Class::_component_mirror_offset; 3595 int java_lang_Class::_init_lock_offset; 3596 int java_lang_Class::_signers_offset; 3597 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3598 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3599 int java_lang_Throwable::backtrace_offset; 3600 int java_lang_Throwable::detailMessage_offset; 3601 int java_lang_Throwable::stackTrace_offset; 3602 int java_lang_Throwable::depth_offset; 3603 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3604 int java_lang_reflect_AccessibleObject::override_offset; 3605 int java_lang_reflect_Method::clazz_offset; 3606 int java_lang_reflect_Method::name_offset; 3607 int java_lang_reflect_Method::returnType_offset; 3608 int java_lang_reflect_Method::parameterTypes_offset; 3609 int java_lang_reflect_Method::exceptionTypes_offset; 3610 int java_lang_reflect_Method::slot_offset; 3611 int java_lang_reflect_Method::modifiers_offset; 3612 int java_lang_reflect_Method::signature_offset; 3613 int java_lang_reflect_Method::annotations_offset; 3614 int java_lang_reflect_Method::parameter_annotations_offset; 3615 int java_lang_reflect_Method::annotation_default_offset; 3616 int java_lang_reflect_Method::type_annotations_offset; 3617 int java_lang_reflect_Constructor::clazz_offset; 3618 int java_lang_reflect_Constructor::parameterTypes_offset; 3619 int java_lang_reflect_Constructor::exceptionTypes_offset; 3620 int java_lang_reflect_Constructor::slot_offset; 3621 int java_lang_reflect_Constructor::modifiers_offset; 3622 int java_lang_reflect_Constructor::signature_offset; 3623 int java_lang_reflect_Constructor::annotations_offset; 3624 int java_lang_reflect_Constructor::parameter_annotations_offset; 3625 int java_lang_reflect_Constructor::type_annotations_offset; 3626 int java_lang_reflect_Field::clazz_offset; 3627 int java_lang_reflect_Field::name_offset; 3628 int java_lang_reflect_Field::type_offset; 3629 int java_lang_reflect_Field::slot_offset; 3630 int java_lang_reflect_Field::modifiers_offset; 3631 int java_lang_reflect_Field::signature_offset; 3632 int java_lang_reflect_Field::annotations_offset; 3633 int java_lang_reflect_Field::type_annotations_offset; 3634 int java_lang_reflect_Parameter::name_offset; 3635 int java_lang_reflect_Parameter::modifiers_offset; 3636 int java_lang_reflect_Parameter::index_offset; 3637 int java_lang_reflect_Parameter::executable_offset; 3638 int java_lang_boxing_object::value_offset; 3639 int java_lang_boxing_object::long_value_offset; 3640 int java_lang_ref_Reference::referent_offset; 3641 int java_lang_ref_Reference::queue_offset; 3642 int java_lang_ref_Reference::next_offset; 3643 int java_lang_ref_Reference::discovered_offset; 3644 int java_lang_ref_Reference::number_of_fake_oop_fields; 3645 int java_lang_ref_SoftReference::timestamp_offset; 3646 int java_lang_ref_SoftReference::static_clock_offset; 3647 int java_lang_ClassLoader::parent_offset; 3648 int java_lang_System::static_in_offset; 3649 int java_lang_System::static_out_offset; 3650 int java_lang_System::static_err_offset; 3651 int java_lang_System::static_security_offset; 3652 int java_lang_StackTraceElement::methodName_offset; 3653 int java_lang_StackTraceElement::fileName_offset; 3654 int java_lang_StackTraceElement::lineNumber_offset; 3655 int java_lang_StackTraceElement::moduleName_offset; 3656 int java_lang_StackTraceElement::moduleVersion_offset; 3657 int java_lang_StackTraceElement::classLoaderName_offset; 3658 int java_lang_StackTraceElement::declaringClass_offset; 3659 int java_lang_StackTraceElement::declaringClassObject_offset; 3660 int java_lang_StackFrameInfo::_declaringClass_offset; 3661 int java_lang_StackFrameInfo::_memberName_offset; 3662 int java_lang_StackFrameInfo::_bci_offset; 3663 int java_lang_StackFrameInfo::_version_offset; 3664 int java_lang_LiveStackFrameInfo::_monitors_offset; 3665 int java_lang_LiveStackFrameInfo::_locals_offset; 3666 int java_lang_LiveStackFrameInfo::_operands_offset; 3667 int java_lang_LiveStackFrameInfo::_mode_offset; 3668 int java_lang_AssertionStatusDirectives::classes_offset; 3669 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3670 int java_lang_AssertionStatusDirectives::packages_offset; 3671 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3672 int java_lang_AssertionStatusDirectives::deflt_offset; 3673 int java_nio_Buffer::_limit_offset; 3674 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3675 int reflect_ConstantPool::_oop_offset; 3676 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3677 3678 3679 // Support for java_lang_StackTraceElement 3680 3681 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3682 element->obj_field_put(fileName_offset, value); 3683 } 3684 3685 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3686 element->obj_field_put(declaringClass_offset, value); 3687 } 3688 3689 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3690 element->obj_field_put(methodName_offset, value); 3691 } 3692 3693 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3694 element->int_field_put(lineNumber_offset, value); 3695 } 3696 3697 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3698 element->obj_field_put(moduleName_offset, value); 3699 } 3700 3701 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3702 element->obj_field_put(moduleVersion_offset, value); 3703 } 3704 3705 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 3706 element->obj_field_put(classLoaderName_offset, value); 3707 } 3708 3709 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 3710 element->obj_field_put(declaringClassObject_offset, value); 3711 } 3712 3713 // Support for java_lang_StackFrameInfo 3714 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3715 element->obj_field_put(_declaringClass_offset, value); 3716 } 3717 3718 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3719 element->short_field_put(_version_offset, value); 3720 } 3721 3722 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3723 element->int_field_put(_bci_offset, value); 3724 } 3725 3726 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3727 element->obj_field_put(_monitors_offset, value); 3728 } 3729 3730 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3731 element->obj_field_put(_locals_offset, value); 3732 } 3733 3734 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3735 element->obj_field_put(_operands_offset, value); 3736 } 3737 3738 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3739 element->int_field_put(_mode_offset, value); 3740 } 3741 3742 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3743 3744 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3745 o->obj_field_put(classes_offset, val); 3746 } 3747 3748 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3749 o->obj_field_put(classEnabled_offset, val); 3750 } 3751 3752 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3753 o->obj_field_put(packages_offset, val); 3754 } 3755 3756 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3757 o->obj_field_put(packageEnabled_offset, val); 3758 } 3759 3760 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3761 o->bool_field_put(deflt_offset, val); 3762 } 3763 3764 3765 // Support for intrinsification of java.nio.Buffer.checkIndex 3766 int java_nio_Buffer::limit_offset() { 3767 return _limit_offset; 3768 } 3769 3770 3771 void java_nio_Buffer::compute_offsets() { 3772 Klass* k = SystemDictionary::nio_Buffer_klass(); 3773 assert(k != NULL, "must be loaded in 1.4+"); 3774 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3775 } 3776 3777 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3778 if (_owner_offset != 0) return; 3779 3780 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3781 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3782 compute_offset(_owner_offset, k, 3783 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3784 } 3785 3786 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3787 assert(_owner_offset != 0, "Must be initialized"); 3788 return obj->obj_field(_owner_offset); 3789 } 3790 3791 // Compute hard-coded offsets 3792 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3793 // are not available to determine the offset_of_static_fields. 3794 void JavaClasses::compute_hard_coded_offsets() { 3795 const int x = heapOopSize; 3796 const int header = instanceOopDesc::base_offset_in_bytes(); 3797 3798 // Throwable Class 3799 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3800 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3801 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3802 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3803 3804 // java_lang_boxing_object 3805 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3806 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3807 3808 // java_lang_ref_Reference: 3809 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3810 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3811 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3812 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3813 // Artificial fields for java_lang_ref_Reference 3814 // The first field is for the discovered field added in 1.4 3815 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3816 3817 // java_lang_ref_SoftReference Class 3818 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3819 // Don't multiply static fields because they are always in wordSize units 3820 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3821 3822 // java_lang_ClassLoader 3823 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3824 3825 // java_lang_System 3826 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3827 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3828 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3829 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3830 3831 // java_lang_StackTraceElement 3832 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header; 3833 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header; 3834 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3835 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3836 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3837 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3838 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3839 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3840 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3841 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3842 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3843 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3844 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3845 3846 } 3847 3848 3849 // Compute non-hard-coded field offsets of all the classes in this file 3850 void JavaClasses::compute_offsets() { 3851 // java_lang_Class::compute_offsets was called earlier in bootstrap 3852 java_lang_ClassLoader::compute_offsets(); 3853 java_lang_Throwable::compute_offsets(); 3854 java_lang_Thread::compute_offsets(); 3855 java_lang_ThreadGroup::compute_offsets(); 3856 java_lang_invoke_MethodHandle::compute_offsets(); 3857 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3858 java_lang_invoke_MemberName::compute_offsets(); 3859 java_lang_invoke_LambdaForm::compute_offsets(); 3860 java_lang_invoke_MethodType::compute_offsets(); 3861 java_lang_invoke_CallSite::compute_offsets(); 3862 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3863 java_security_AccessControlContext::compute_offsets(); 3864 // Initialize reflection classes. The layouts of these classes 3865 // changed with the new reflection implementation in JDK 1.4, and 3866 // since the Universe doesn't know what JDK version it is until this 3867 // point we defer computation of these offsets until now. 3868 java_lang_reflect_AccessibleObject::compute_offsets(); 3869 java_lang_reflect_Method::compute_offsets(); 3870 java_lang_reflect_Constructor::compute_offsets(); 3871 java_lang_reflect_Field::compute_offsets(); 3872 java_nio_Buffer::compute_offsets(); 3873 reflect_ConstantPool::compute_offsets(); 3874 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3875 java_lang_reflect_Parameter::compute_offsets(); 3876 java_lang_reflect_Module::compute_offsets(); 3877 java_lang_StackFrameInfo::compute_offsets(); 3878 java_lang_LiveStackFrameInfo::compute_offsets(); 3879 3880 // generated interpreter code wants to know about the offsets we just computed: 3881 AbstractAssembler::update_delayed_values(); 3882 } 3883 3884 #ifndef PRODUCT 3885 3886 // These functions exist to assert the validity of hard-coded field offsets to guard 3887 // against changes in the class files 3888 3889 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3890 EXCEPTION_MARK; 3891 fieldDescriptor fd; 3892 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3893 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3894 InstanceKlass* ik = InstanceKlass::cast(k); 3895 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3896 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3897 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3898 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3899 return false; 3900 } 3901 if (fd.is_static()) { 3902 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3903 return false; 3904 } 3905 if (fd.offset() == hardcoded_offset ) { 3906 return true; 3907 } else { 3908 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3909 klass_name, field_name, hardcoded_offset, fd.offset()); 3910 return false; 3911 } 3912 } 3913 3914 3915 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3916 EXCEPTION_MARK; 3917 fieldDescriptor fd; 3918 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3919 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3920 InstanceKlass* ik = InstanceKlass::cast(k); 3921 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3922 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3923 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3924 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3925 return false; 3926 } 3927 if (!fd.is_static()) { 3928 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3929 return false; 3930 } 3931 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3932 return true; 3933 } else { 3934 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()); 3935 return false; 3936 } 3937 } 3938 3939 3940 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3941 EXCEPTION_MARK; 3942 fieldDescriptor fd; 3943 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3944 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3945 InstanceKlass* ik = InstanceKlass::cast(k); 3946 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3947 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3948 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3949 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3950 return false; 3951 } 3952 if (!fd.is_static() || !fd.has_initial_value()) { 3953 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3954 return false; 3955 } 3956 if (!fd.initial_value_tag().is_int()) { 3957 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3958 return false; 3959 } 3960 jint field_value = fd.int_initial_value(); 3961 if (field_value == hardcoded_constant) { 3962 return true; 3963 } else { 3964 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); 3965 return false; 3966 } 3967 } 3968 3969 3970 // Check the hard-coded field offsets of all the classes in this file 3971 3972 void JavaClasses::check_offsets() { 3973 bool valid = true; 3974 3975 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3976 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3977 3978 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3979 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3980 3981 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3982 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3983 3984 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3985 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3986 3987 // java.lang.String 3988 3989 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3990 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3991 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3992 3993 // java.lang.Class 3994 3995 // Fake fields 3996 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3997 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3998 3999 // java.lang.Throwable 4000 4001 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 4002 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 4003 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 4004 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 4005 4006 // Boxed primitive objects (java_lang_boxing_object) 4007 4008 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4009 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4010 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4011 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4012 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4013 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4014 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4015 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4016 4017 // java.lang.ClassLoader 4018 4019 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 4020 4021 // java.lang.System 4022 4023 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4024 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4025 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4026 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4027 4028 // java.lang.StackTraceElement 4029 4030 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;"); 4031 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;"); 4032 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;"); 4033 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;"); 4034 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4035 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4036 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4037 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4038 4039 // java.lang.ref.Reference 4040 4041 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4042 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4043 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4044 // Fake field 4045 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4046 4047 // java.lang.ref.SoftReference 4048 4049 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4050 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4051 4052 // java.lang.AssertionStatusDirectives 4053 // 4054 // The CheckAssertionStatusDirectives boolean can be removed from here and 4055 // globals.hpp after the AssertionStatusDirectives class has been integrated 4056 // into merlin "for some time." Without it, the vm will fail with early 4057 // merlin builds. 4058 4059 if (CheckAssertionStatusDirectives) { 4060 const char* nm = "java/lang/AssertionStatusDirectives"; 4061 const char* sig = "[Ljava/lang/String;"; 4062 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4063 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4064 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4065 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4066 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4067 } 4068 4069 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4070 } 4071 4072 #endif // PRODUCT 4073 4074 int InjectedField::compute_offset() { 4075 InstanceKlass* ik = InstanceKlass::cast(klass()); 4076 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4077 if (!may_be_java && !fs.access_flags().is_internal()) { 4078 // Only look at injected fields 4079 continue; 4080 } 4081 if (fs.name() == name() && fs.signature() == signature()) { 4082 return fs.offset(); 4083 } 4084 } 4085 ResourceMark rm; 4086 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)" : ""); 4087 #ifndef PRODUCT 4088 ik->print(); 4089 tty->print_cr("all fields:"); 4090 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4091 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4092 } 4093 #endif //PRODUCT 4094 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4095 return -1; 4096 } 4097 4098 void javaClasses_init() { 4099 JavaClasses::compute_offsets(); 4100 JavaClasses::check_offsets(); 4101 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4102 }