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 "prims/resolvedMethodTable.hpp" 49 #include "runtime/fieldDescriptor.hpp" 50 #include "runtime/handles.inline.hpp" 51 #include "runtime/interfaceSupport.hpp" 52 #include "runtime/java.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/safepoint.hpp" 55 #include "runtime/thread.inline.hpp" 56 #include "runtime/vframe.hpp" 57 #include "utilities/align.hpp" 58 #include "utilities/preserveException.hpp" 59 60 #if INCLUDE_JVMCI 61 #include "jvmci/jvmciJavaClasses.hpp" 62 #endif 63 64 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 65 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 66 67 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 68 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 69 70 InjectedField JavaClasses::_injected_fields[] = { 71 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 72 }; 73 74 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 75 return _injected_fields[id].compute_offset(); 76 } 77 78 79 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 80 *field_count = 0; 81 82 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 83 if (sid == vmSymbols::NO_SID) { 84 // Only well known classes can inject fields 85 return NULL; 86 } 87 88 int count = 0; 89 int start = -1; 90 91 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 92 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 93 count++; \ 94 if (start == -1) start = klass##_##name##_enum; \ 95 } 96 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 97 #undef LOOKUP_INJECTED_FIELD 98 99 if (start != -1) { 100 *field_count = count; 101 return _injected_fields + start; 102 } 103 return NULL; 104 } 105 106 107 static bool find_field(InstanceKlass* ik, 108 Symbol* name_symbol, Symbol* signature_symbol, 109 fieldDescriptor* fd, 110 bool is_static = false, bool allow_super = false) { 111 if (allow_super || is_static) { 112 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 113 } else { 114 return ik->find_local_field(name_symbol, signature_symbol, fd); 115 } 116 } 117 118 // Helpful routine for computing field offsets at run time rather than hardcoding them 119 static void 120 compute_offset(int &dest_offset, 121 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 122 bool is_static = false, bool allow_super = false) { 123 fieldDescriptor fd; 124 InstanceKlass* ik = InstanceKlass::cast(klass); 125 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 126 ResourceMark rm; 127 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 128 #ifndef PRODUCT 129 ik->print(); 130 tty->print_cr("all fields:"); 131 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 132 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 133 } 134 #endif //PRODUCT 135 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 136 } 137 dest_offset = fd.offset(); 138 } 139 140 // Same as above but for "optional" offsets that might not be present in certain JDK versions 141 static void 142 compute_optional_offset(int& dest_offset, 143 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 144 bool allow_super = false) { 145 fieldDescriptor fd; 146 InstanceKlass* ik = InstanceKlass::cast(klass); 147 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 148 dest_offset = fd.offset(); 149 } 150 } 151 152 153 int java_lang_String::value_offset = 0; 154 int java_lang_String::hash_offset = 0; 155 int java_lang_String::coder_offset = 0; 156 157 bool java_lang_String::initialized = false; 158 159 bool java_lang_String::is_instance(oop obj) { 160 return is_instance_inlined(obj); 161 } 162 163 void java_lang_String::compute_offsets() { 164 assert(!initialized, "offsets should be initialized only once"); 165 166 Klass* k = SystemDictionary::String_klass(); 167 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 168 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 169 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 170 171 initialized = true; 172 } 173 174 class CompactStringsFixup : public FieldClosure { 175 private: 176 bool _value; 177 178 public: 179 CompactStringsFixup(bool value) : _value(value) {} 180 181 void do_field(fieldDescriptor* fd) { 182 if (fd->name() == vmSymbols::compact_strings_name()) { 183 oop mirror = fd->field_holder()->java_mirror(); 184 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 185 assert(mirror != NULL, "String must have mirror already"); 186 mirror->bool_field_put(fd->offset(), _value); 187 } 188 } 189 }; 190 191 void java_lang_String::set_compact_strings(bool value) { 192 CompactStringsFixup fix(value); 193 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 194 } 195 196 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 197 assert(initialized, "Must be initialized"); 198 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 199 200 // Create the String object first, so there's a chance that the String 201 // and the char array it points to end up in the same cache line. 202 oop obj; 203 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 204 205 // Create the char array. The String object must be handlized here 206 // because GC can happen as a result of the allocation attempt. 207 Handle h_obj(THREAD, obj); 208 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 209 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 210 211 // Point the String at the char array 212 obj = h_obj(); 213 set_value(obj, buffer); 214 // No need to zero the offset, allocation zero'ed the entire String object 215 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 216 return h_obj; 217 } 218 219 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 220 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 221 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 222 typeArrayOop buffer = value(h_obj()); 223 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 224 if (is_latin1) { 225 for (int index = 0; index < length; index++) { 226 buffer->byte_at_put(index, (jbyte)unicode[index]); 227 } 228 } else { 229 for (int index = 0; index < length; index++) { 230 buffer->char_at_put(index, unicode[index]); 231 } 232 } 233 234 #ifdef ASSERT 235 { 236 ResourceMark rm; 237 char* expected = UNICODE::as_utf8(unicode, length); 238 char* actual = as_utf8_string(h_obj()); 239 if (strcmp(expected, actual) != 0) { 240 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 241 ShouldNotReachHere(); 242 } 243 } 244 #endif 245 246 return h_obj; 247 } 248 249 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 250 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 251 return h_obj(); 252 } 253 254 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 255 if (utf8_str == NULL) { 256 return Handle(); 257 } 258 bool has_multibyte, is_latin1; 259 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 260 if (!CompactStrings) { 261 has_multibyte = true; 262 is_latin1 = false; 263 } 264 265 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 266 if (length > 0) { 267 if (!has_multibyte) { 268 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 269 } else if (is_latin1) { 270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 271 } else { 272 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 273 } 274 } 275 276 #ifdef ASSERT 277 // This check is too strict because the input string is not necessarily valid UTF8. 278 // For example, it may be created with arbitrary content via jni_NewStringUTF. 279 /* 280 { 281 ResourceMark rm; 282 const char* expected = utf8_str; 283 char* actual = as_utf8_string(h_obj()); 284 if (strcmp(expected, actual) != 0) { 285 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 286 ShouldNotReachHere(); 287 } 288 } 289 */ 290 #endif 291 292 return h_obj; 293 } 294 295 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 296 Handle h_obj = create_from_str(utf8_str, CHECK_0); 297 return h_obj(); 298 } 299 300 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 301 const char* utf8_str = (char*)symbol->bytes(); 302 int utf8_len = symbol->utf8_length(); 303 304 bool has_multibyte, is_latin1; 305 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 306 if (!CompactStrings) { 307 has_multibyte = true; 308 is_latin1 = false; 309 } 310 311 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 312 if (length > 0) { 313 if (!has_multibyte) { 314 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 315 } else if (is_latin1) { 316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 317 } else { 318 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 319 } 320 } 321 322 #ifdef ASSERT 323 { 324 ResourceMark rm; 325 const char* expected = symbol->as_utf8(); 326 char* actual = as_utf8_string(h_obj()); 327 if (strncmp(expected, actual, utf8_len) != 0) { 328 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 329 ShouldNotReachHere(); 330 } 331 } 332 #endif 333 334 return h_obj; 335 } 336 337 // Converts a C string to a Java String based on current encoding 338 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 339 assert(str != NULL, "bad arguments"); 340 341 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 342 static to_java_string_fn_t _to_java_string_fn = NULL; 343 344 if (_to_java_string_fn == NULL) { 345 void *lib_handle = os::native_java_library(); 346 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 347 if (_to_java_string_fn == NULL) { 348 fatal("NewStringPlatform missing"); 349 } 350 } 351 352 jstring js = NULL; 353 { JavaThread* thread = (JavaThread*)THREAD; 354 assert(thread->is_Java_thread(), "must be java thread"); 355 HandleMark hm(thread); 356 ThreadToNativeFromVM ttn(thread); 357 js = (_to_java_string_fn)(thread->jni_environment(), str); 358 } 359 return Handle(THREAD, JNIHandles::resolve(js)); 360 } 361 362 // Converts a Java String to a native C string that can be used for 363 // native OS calls. 364 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 365 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 366 static to_platform_string_fn_t _to_platform_string_fn = NULL; 367 368 if (_to_platform_string_fn == NULL) { 369 void *lib_handle = os::native_java_library(); 370 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 371 if (_to_platform_string_fn == NULL) { 372 fatal("GetStringPlatformChars missing"); 373 } 374 } 375 376 char *native_platform_string; 377 { JavaThread* thread = (JavaThread*)THREAD; 378 assert(thread->is_Java_thread(), "must be java thread"); 379 JNIEnv *env = thread->jni_environment(); 380 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 381 bool is_copy; 382 HandleMark hm(thread); 383 ThreadToNativeFromVM ttn(thread); 384 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 385 assert(is_copy == JNI_TRUE, "is_copy value changed"); 386 JNIHandles::destroy_local(js); 387 } 388 return native_platform_string; 389 } 390 391 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 392 oop obj = java_string(); 393 // Typical usage is to convert all '/' to '.' in string. 394 typeArrayOop value = java_lang_String::value(obj); 395 int length = java_lang_String::length(obj); 396 bool is_latin1 = java_lang_String::is_latin1(obj); 397 398 // First check if any from_char exist 399 int index; // Declared outside, used later 400 for (index = 0; index < length; index++) { 401 jchar c = !is_latin1 ? value->char_at(index) : 402 ((jchar) value->byte_at(index)) & 0xff; 403 if (c == from_char) { 404 break; 405 } 406 } 407 if (index == length) { 408 // No from_char, so do not copy. 409 return java_string; 410 } 411 412 // Check if result string will be latin1 413 bool to_is_latin1 = false; 414 415 // Replacement char must be latin1 416 if (CompactStrings && UNICODE::is_latin1(to_char)) { 417 if (is_latin1) { 418 // Source string is latin1 as well 419 to_is_latin1 = true; 420 } else if (!UNICODE::is_latin1(from_char)) { 421 // We are replacing an UTF16 char. Scan string to 422 // check if result can be latin1 encoded. 423 to_is_latin1 = true; 424 for (index = 0; index < length; index++) { 425 jchar c = value->char_at(index); 426 if (c != from_char && !UNICODE::is_latin1(c)) { 427 to_is_latin1 = false; 428 break; 429 } 430 } 431 } 432 } 433 434 // Create new UNICODE (or byte) buffer. Must handlize value because GC 435 // may happen during String and char array creation. 436 typeArrayHandle h_value(THREAD, value); 437 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 438 typeArrayOop from_buffer = h_value(); 439 typeArrayOop to_buffer = java_lang_String::value(string()); 440 441 // Copy contents 442 for (index = 0; index < length; index++) { 443 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 444 ((jchar) from_buffer->byte_at(index)) & 0xff; 445 if (c == from_char) { 446 c = to_char; 447 } 448 if (!to_is_latin1) { 449 to_buffer->char_at_put(index, c); 450 } else { 451 to_buffer->byte_at_put(index, (jbyte) c); 452 } 453 } 454 return string; 455 } 456 457 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 458 typeArrayOop value = java_lang_String::value(java_string); 459 length = java_lang_String::length(java_string); 460 bool is_latin1 = java_lang_String::is_latin1(java_string); 461 462 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 463 if (result != NULL) { 464 if (!is_latin1) { 465 for (int index = 0; index < length; index++) { 466 result[index] = value->char_at(index); 467 } 468 } else { 469 for (int index = 0; index < length; index++) { 470 result[index] = ((jchar) value->byte_at(index)) & 0xff; 471 } 472 } 473 } else { 474 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 475 } 476 return result; 477 } 478 479 unsigned int java_lang_String::hash_code(oop java_string) { 480 int length = java_lang_String::length(java_string); 481 // Zero length string will hash to zero with String.hashCode() function. 482 if (length == 0) return 0; 483 484 typeArrayOop value = java_lang_String::value(java_string); 485 bool is_latin1 = java_lang_String::is_latin1(java_string); 486 487 if (is_latin1) { 488 return java_lang_String::hash_code(value->byte_at_addr(0), length); 489 } else { 490 return java_lang_String::hash_code(value->char_at_addr(0), length); 491 } 492 } 493 494 char* java_lang_String::as_quoted_ascii(oop java_string) { 495 typeArrayOop value = java_lang_String::value(java_string); 496 int length = java_lang_String::length(java_string); 497 bool is_latin1 = java_lang_String::is_latin1(java_string); 498 499 if (length == 0) return NULL; 500 501 char* result; 502 int result_length; 503 if (!is_latin1) { 504 jchar* base = value->char_at_addr(0); 505 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 506 result = NEW_RESOURCE_ARRAY(char, result_length); 507 UNICODE::as_quoted_ascii(base, length, result, result_length); 508 } else { 509 jbyte* base = value->byte_at_addr(0); 510 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 511 result = NEW_RESOURCE_ARRAY(char, result_length); 512 UNICODE::as_quoted_ascii(base, length, result, result_length); 513 } 514 assert(result_length >= length + 1, "must not be shorter"); 515 assert(result_length == (int)strlen(result) + 1, "must match"); 516 return result; 517 } 518 519 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 520 typeArrayOop value = java_lang_String::value(java_string); 521 int length = java_lang_String::length(java_string); 522 bool is_latin1 = java_lang_String::is_latin1(java_string); 523 if (!is_latin1) { 524 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 525 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 526 return sym; 527 } else { 528 ResourceMark rm; 529 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 530 const char* base = UNICODE::as_utf8(position, length); 531 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 532 return sym; 533 } 534 } 535 536 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 537 typeArrayOop value = java_lang_String::value(java_string); 538 int length = java_lang_String::length(java_string); 539 bool is_latin1 = java_lang_String::is_latin1(java_string); 540 if (!is_latin1) { 541 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 542 return SymbolTable::probe_unicode(base, length); 543 } else { 544 ResourceMark rm; 545 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 546 const char* base = UNICODE::as_utf8(position, length); 547 return SymbolTable::probe(base, length); 548 } 549 } 550 551 int java_lang_String::utf8_length(oop java_string) { 552 typeArrayOop value = java_lang_String::value(java_string); 553 int length = java_lang_String::length(java_string); 554 bool is_latin1 = java_lang_String::is_latin1(java_string); 555 if (length == 0) { 556 return 0; 557 } 558 if (!is_latin1) { 559 return UNICODE::utf8_length(value->char_at_addr(0), length); 560 } else { 561 return UNICODE::utf8_length(value->byte_at_addr(0), length); 562 } 563 } 564 565 char* java_lang_String::as_utf8_string(oop java_string) { 566 typeArrayOop value = java_lang_String::value(java_string); 567 int length = java_lang_String::length(java_string); 568 bool is_latin1 = java_lang_String::is_latin1(java_string); 569 if (!is_latin1) { 570 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 571 return UNICODE::as_utf8(position, length); 572 } else { 573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 574 return UNICODE::as_utf8(position, length); 575 } 576 } 577 578 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 584 return UNICODE::as_utf8(position, length, buf, buflen); 585 } else { 586 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 587 return UNICODE::as_utf8(position, length, buf, buflen); 588 } 589 } 590 591 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string); 594 assert(start + len <= length, "just checking"); 595 bool is_latin1 = java_lang_String::is_latin1(java_string); 596 if (!is_latin1) { 597 jchar* position = value->char_at_addr(start); 598 return UNICODE::as_utf8(position, len); 599 } else { 600 jbyte* position = value->byte_at_addr(start); 601 return UNICODE::as_utf8(position, len); 602 } 603 } 604 605 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 606 typeArrayOop value = java_lang_String::value(java_string); 607 int length = java_lang_String::length(java_string); 608 assert(start + len <= length, "just checking"); 609 bool is_latin1 = java_lang_String::is_latin1(java_string); 610 if (!is_latin1) { 611 jchar* position = value->char_at_addr(start); 612 return UNICODE::as_utf8(position, len, buf, buflen); 613 } else { 614 jbyte* position = value->byte_at_addr(start); 615 return UNICODE::as_utf8(position, len, buf, buflen); 616 } 617 } 618 619 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 620 assert(java_string->klass() == SystemDictionary::String_klass(), 621 "must be java_string"); 622 typeArrayOop value = java_lang_String::value(java_string); 623 int length = java_lang_String::length(java_string); 624 if (length != len) { 625 return false; 626 } 627 bool is_latin1 = java_lang_String::is_latin1(java_string); 628 if (!is_latin1) { 629 for (int i = 0; i < len; i++) { 630 if (value->char_at(i) != chars[i]) { 631 return false; 632 } 633 } 634 } else { 635 for (int i = 0; i < len; i++) { 636 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 637 return false; 638 } 639 } 640 } 641 return true; 642 } 643 644 bool java_lang_String::equals(oop str1, oop str2) { 645 assert(str1->klass() == SystemDictionary::String_klass(), 646 "must be java String"); 647 assert(str2->klass() == SystemDictionary::String_klass(), 648 "must be java String"); 649 typeArrayOop value1 = java_lang_String::value(str1); 650 int length1 = java_lang_String::length(str1); 651 bool is_latin1 = java_lang_String::is_latin1(str1); 652 typeArrayOop value2 = java_lang_String::value(str2); 653 int length2 = java_lang_String::length(str2); 654 bool is_latin2 = java_lang_String::is_latin1(str2); 655 656 if ((length1 != length2) || (is_latin1 != is_latin2)) { 657 // Strings of different size or with different 658 // coders are never equal. 659 return false; 660 } 661 int blength1 = value1->length(); 662 for (int i = 0; i < value1->length(); i++) { 663 if (value1->byte_at(i) != value2->byte_at(i)) { 664 return false; 665 } 666 } 667 return true; 668 } 669 670 void java_lang_String::print(oop java_string, outputStream* st) { 671 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 672 typeArrayOop value = java_lang_String::value(java_string); 673 674 if (value == NULL) { 675 // This can happen if, e.g., printing a String 676 // object before its initializer has been called 677 st->print("NULL"); 678 return; 679 } 680 681 int length = java_lang_String::length(java_string); 682 bool is_latin1 = java_lang_String::is_latin1(java_string); 683 684 st->print("\""); 685 for (int index = 0; index < length; index++) { 686 st->print("%c", (!is_latin1) ? value->char_at(index) : 687 ((jchar) value->byte_at(index)) & 0xff ); 688 } 689 st->print("\""); 690 } 691 692 693 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 694 assert(mirror.not_null() && fd->is_static(), "just checking"); 695 if (fd->has_initial_value()) { 696 BasicType t = fd->field_type(); 697 switch (t) { 698 case T_BYTE: 699 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 700 break; 701 case T_BOOLEAN: 702 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 703 break; 704 case T_CHAR: 705 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 706 break; 707 case T_SHORT: 708 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 709 break; 710 case T_INT: 711 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 712 break; 713 case T_FLOAT: 714 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 715 break; 716 case T_DOUBLE: 717 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 718 break; 719 case T_LONG: 720 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 721 break; 722 case T_OBJECT: 723 { 724 #ifdef ASSERT 725 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 726 assert(fd->signature() == sym, "just checking"); 727 #endif 728 oop string = fd->string_initial_value(CHECK); 729 mirror()->obj_field_put(fd->offset(), string); 730 } 731 break; 732 default: 733 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 734 "Illegal ConstantValue attribute in class file"); 735 } 736 } 737 } 738 739 740 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 741 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 742 743 // If the offset was read from the shared archive, it was fixed up already 744 if (!k->is_shared()) { 745 if (k->is_instance_klass()) { 746 // During bootstrap, java.lang.Class wasn't loaded so static field 747 // offsets were computed without the size added it. Go back and 748 // update all the static field offsets to included the size. 749 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 750 if (fs.access_flags().is_static()) { 751 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 752 fs.set_offset(real_offset); 753 } 754 } 755 } 756 } 757 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 758 } 759 760 void java_lang_Class::initialize_mirror_fields(Klass* k, 761 Handle mirror, 762 Handle protection_domain, 763 TRAPS) { 764 // Allocate a simple java object for a lock. 765 // This needs to be a java object because during class initialization 766 // it can be held across a java call. 767 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 768 set_init_lock(mirror(), r); 769 770 // Set protection domain also 771 set_protection_domain(mirror(), protection_domain()); 772 773 // Initialize static fields 774 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 775 } 776 777 // Set the java.lang.Module module field in the java_lang_Class mirror 778 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 779 if (module.is_null()) { 780 // During startup, the module may be NULL only if java.base has not been defined yet. 781 // Put the class on the fixup_module_list to patch later when the java.lang.Module 782 // for java.base is known. 783 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 784 785 bool javabase_was_defined = false; 786 { 787 MutexLocker m1(Module_lock, THREAD); 788 // Keep list of classes needing java.base module fixup 789 if (!ModuleEntryTable::javabase_defined()) { 790 assert(k->java_mirror() != NULL, "Class's mirror is null"); 791 k->class_loader_data()->inc_keep_alive(); 792 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 793 fixup_module_field_list()->push(k); 794 } else { 795 javabase_was_defined = true; 796 } 797 } 798 799 // If java.base was already defined then patch this particular class with java.base. 800 if (javabase_was_defined) { 801 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 802 assert(javabase_entry != NULL && javabase_entry->module_handle() != NULL, 803 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 804 Handle javabase_handle(THREAD, javabase_entry->module()); 805 set_module(mirror(), javabase_handle()); 806 } 807 } else { 808 assert(Universe::is_module_initialized() || 809 (ModuleEntryTable::javabase_defined() && 810 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 811 "Incorrect java.lang.Module specification while creating mirror"); 812 set_module(mirror(), module()); 813 } 814 } 815 816 // Statically allocate fixup lists because they always get created. 817 void java_lang_Class::allocate_fixup_lists() { 818 GrowableArray<Klass*>* mirror_list = 819 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 820 set_fixup_mirror_list(mirror_list); 821 822 GrowableArray<Klass*>* module_list = 823 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 824 set_fixup_module_field_list(module_list); 825 } 826 827 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 828 Handle module, Handle protection_domain, TRAPS) { 829 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 830 assert(k->java_mirror() == NULL, "should only assign mirror once"); 831 832 // Use this moment of initialization to cache modifier_flags also, 833 // to support Class.getModifiers(). Instance classes recalculate 834 // the cached flags after the class file is parsed, but before the 835 // class is put into the system dictionary. 836 int computed_modifiers = k->compute_modifier_flags(CHECK); 837 k->set_modifier_flags(computed_modifiers); 838 // Class_klass has to be loaded because it is used to allocate 839 // the mirror. 840 if (SystemDictionary::Class_klass_loaded()) { 841 // Allocate mirror (java.lang.Class instance) 842 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 843 Handle mirror(THREAD, mirror_oop); 844 Handle comp_mirror; 845 846 // Setup indirection from mirror->klass 847 java_lang_Class::set_klass(mirror(), k); 848 849 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 850 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 851 852 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 853 854 // It might also have a component mirror. This mirror must already exist. 855 if (k->is_array_klass()) { 856 if (k->is_typeArray_klass()) { 857 BasicType type = TypeArrayKlass::cast(k)->element_type(); 858 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 859 } else { 860 assert(k->is_objArray_klass(), "Must be"); 861 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 862 assert(element_klass != NULL, "Must have an element klass"); 863 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 864 } 865 assert(comp_mirror() != NULL, "must have a mirror"); 866 867 // Two-way link between the array klass and its component mirror: 868 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 869 set_component_mirror(mirror(), comp_mirror()); 870 // See below for ordering dependencies between field array_klass in component mirror 871 // and java_mirror in this klass. 872 } else { 873 assert(k->is_instance_klass(), "Must be"); 874 875 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 876 if (HAS_PENDING_EXCEPTION) { 877 // If any of the fields throws an exception like OOM remove the klass field 878 // from the mirror so GC doesn't follow it after the klass has been deallocated. 879 // This mirror looks like a primitive type, which logically it is because it 880 // it represents no class. 881 java_lang_Class::set_klass(mirror(), NULL); 882 return; 883 } 884 } 885 886 // set the classLoader field in the java_lang_Class instance 887 assert(class_loader() == k->class_loader(), "should be same"); 888 set_class_loader(mirror(), class_loader()); 889 890 // Setup indirection from klass->mirror 891 // after any exceptions can happen during allocations. 892 k->set_java_mirror(mirror()); 893 894 // Set the module field in the java_lang_Class instance. This must be done 895 // after the mirror is set. 896 set_mirror_module_field(k, mirror, module, THREAD); 897 898 if (comp_mirror() != NULL) { 899 // Set after k->java_mirror() is published, because compiled code running 900 // concurrently doesn't expect a k to have a null java_mirror. 901 release_set_array_klass(comp_mirror(), k); 902 } 903 } else { 904 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 905 fixup_mirror_list()->push(k); 906 } 907 } 908 909 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 910 assert(_module_offset != 0, "must have been computed already"); 911 java_lang_Class::set_module(k->java_mirror(), module()); 912 } 913 914 int java_lang_Class::oop_size(oop java_class) { 915 assert(_oop_size_offset != 0, "must be set"); 916 int size = java_class->int_field(_oop_size_offset); 917 assert(size > 0, "Oop size must be greater than zero, not %d", size); 918 return size; 919 } 920 921 void java_lang_Class::set_oop_size(oop java_class, int size) { 922 assert(_oop_size_offset != 0, "must be set"); 923 assert(size > 0, "Oop size must be greater than zero, not %d", size); 924 java_class->int_field_put(_oop_size_offset, size); 925 } 926 927 int java_lang_Class::static_oop_field_count(oop java_class) { 928 assert(_static_oop_field_count_offset != 0, "must be set"); 929 return java_class->int_field(_static_oop_field_count_offset); 930 } 931 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 932 assert(_static_oop_field_count_offset != 0, "must be set"); 933 java_class->int_field_put(_static_oop_field_count_offset, size); 934 } 935 936 oop java_lang_Class::protection_domain(oop java_class) { 937 assert(_protection_domain_offset != 0, "must be set"); 938 return java_class->obj_field(_protection_domain_offset); 939 } 940 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 941 assert(_protection_domain_offset != 0, "must be set"); 942 java_class->obj_field_put(_protection_domain_offset, pd); 943 } 944 945 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 946 assert(_component_mirror_offset != 0, "must be set"); 947 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 948 } 949 oop java_lang_Class::component_mirror(oop java_class) { 950 assert(_component_mirror_offset != 0, "must be set"); 951 return java_class->obj_field(_component_mirror_offset); 952 } 953 954 oop java_lang_Class::init_lock(oop java_class) { 955 assert(_init_lock_offset != 0, "must be set"); 956 return java_class->obj_field(_init_lock_offset); 957 } 958 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 959 assert(_init_lock_offset != 0, "must be set"); 960 java_class->obj_field_put(_init_lock_offset, init_lock); 961 } 962 963 objArrayOop java_lang_Class::signers(oop java_class) { 964 assert(_signers_offset != 0, "must be set"); 965 return (objArrayOop)java_class->obj_field(_signers_offset); 966 } 967 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 968 assert(_signers_offset != 0, "must be set"); 969 java_class->obj_field_put(_signers_offset, (oop)signers); 970 } 971 972 973 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 974 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 975 if (_class_loader_offset != 0) { 976 java_class->obj_field_put(_class_loader_offset, loader); 977 } 978 } 979 980 oop java_lang_Class::class_loader(oop java_class) { 981 assert(_class_loader_offset != 0, "must be set"); 982 return java_class->obj_field(_class_loader_offset); 983 } 984 985 oop java_lang_Class::module(oop java_class) { 986 assert(_module_offset != 0, "must be set"); 987 return java_class->obj_field(_module_offset); 988 } 989 990 void java_lang_Class::set_module(oop java_class, oop module) { 991 assert(_module_offset != 0, "must be set"); 992 java_class->obj_field_put(_module_offset, module); 993 } 994 995 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 996 // This should be improved by adding a field at the Java level or by 997 // introducing a new VM klass (see comment in ClassFileParser) 998 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 999 if (type != T_VOID) { 1000 Klass* aklass = Universe::typeArrayKlassObj(type); 1001 assert(aklass != NULL, "correct bootstrap"); 1002 release_set_array_klass(java_class, aklass); 1003 } 1004 #ifdef ASSERT 1005 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1006 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1007 #endif 1008 return java_class; 1009 } 1010 1011 1012 Klass* java_lang_Class::as_Klass(oop java_class) { 1013 //%note memory_2 1014 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1015 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1016 assert(k == NULL || k->is_klass(), "type check"); 1017 return k; 1018 } 1019 1020 1021 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1022 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1023 java_class->metadata_field_put(_klass_offset, klass); 1024 } 1025 1026 1027 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1028 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1029 Symbol* name = NULL; 1030 bool is_instance = false; 1031 if (is_primitive(java_class)) { 1032 name = vmSymbols::type_signature(primitive_type(java_class)); 1033 } else { 1034 Klass* k = as_Klass(java_class); 1035 is_instance = k->is_instance_klass(); 1036 name = k->name(); 1037 } 1038 if (name == NULL) { 1039 st->print("<null>"); 1040 return; 1041 } 1042 if (is_instance) st->print("L"); 1043 st->write((char*) name->base(), (int) name->utf8_length()); 1044 if (is_instance) st->print(";"); 1045 } 1046 1047 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1048 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1049 Symbol* name; 1050 if (is_primitive(java_class)) { 1051 name = vmSymbols::type_signature(primitive_type(java_class)); 1052 // Because this can create a new symbol, the caller has to decrement 1053 // the refcount, so make adjustment here and below for symbols returned 1054 // that are not created or incremented due to a successful lookup. 1055 name->increment_refcount(); 1056 } else { 1057 Klass* k = as_Klass(java_class); 1058 if (!k->is_instance_klass()) { 1059 name = k->name(); 1060 name->increment_refcount(); 1061 } else { 1062 ResourceMark rm; 1063 const char* sigstr = k->signature_name(); 1064 int siglen = (int) strlen(sigstr); 1065 if (!intern_if_not_found) { 1066 name = SymbolTable::probe(sigstr, siglen); 1067 } else { 1068 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1069 } 1070 } 1071 } 1072 return name; 1073 } 1074 1075 // Returns the Java name for this Java mirror (Resource allocated) 1076 // See Klass::external_name(). 1077 // For primitive type Java mirrors, its type name is returned. 1078 const char* java_lang_Class::as_external_name(oop java_class) { 1079 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1080 const char* name = NULL; 1081 if (is_primitive(java_class)) { 1082 name = type2name(primitive_type(java_class)); 1083 } else { 1084 name = as_Klass(java_class)->external_name(); 1085 } 1086 if (name == NULL) { 1087 name = "<null>"; 1088 } 1089 return name; 1090 } 1091 1092 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1093 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1094 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1095 return k; 1096 } 1097 1098 1099 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1100 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1101 java_class->release_metadata_field_put(_array_klass_offset, klass); 1102 } 1103 1104 1105 bool java_lang_Class::is_primitive(oop java_class) { 1106 // should assert: 1107 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1108 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1109 1110 #ifdef ASSERT 1111 if (is_primitive) { 1112 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1113 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1114 "Should be either the T_VOID primitive or a java primitive"); 1115 } 1116 #endif 1117 1118 return is_primitive; 1119 } 1120 1121 1122 BasicType java_lang_Class::primitive_type(oop java_class) { 1123 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1124 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1125 BasicType type = T_VOID; 1126 if (ak != NULL) { 1127 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1128 type = ArrayKlass::cast(ak)->element_type(); 1129 } else { 1130 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1131 } 1132 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1133 return type; 1134 } 1135 1136 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1137 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1138 if (is_primitive(java_class)) { 1139 if (reference_klass != NULL) 1140 (*reference_klass) = NULL; 1141 return primitive_type(java_class); 1142 } else { 1143 if (reference_klass != NULL) 1144 (*reference_klass) = as_Klass(java_class); 1145 return T_OBJECT; 1146 } 1147 } 1148 1149 1150 oop java_lang_Class::primitive_mirror(BasicType t) { 1151 oop mirror = Universe::java_mirror(t); 1152 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1153 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1154 return mirror; 1155 } 1156 1157 bool java_lang_Class::offsets_computed = false; 1158 int java_lang_Class::classRedefinedCount_offset = -1; 1159 1160 void java_lang_Class::compute_offsets() { 1161 assert(!offsets_computed, "offsets should be initialized only once"); 1162 offsets_computed = true; 1163 1164 Klass* k = SystemDictionary::Class_klass(); 1165 // The classRedefinedCount field is only present starting in 1.5, 1166 // so don't go fatal. 1167 compute_optional_offset(classRedefinedCount_offset, 1168 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1169 1170 // Needs to be optional because the old build runs Queens during bootstrapping 1171 // and jdk8-9 doesn't have coordinated pushes yet. 1172 compute_optional_offset(_class_loader_offset, 1173 k, vmSymbols::classLoader_name(), 1174 vmSymbols::classloader_signature()); 1175 1176 compute_offset(_component_mirror_offset, 1177 k, vmSymbols::componentType_name(), 1178 vmSymbols::class_signature()); 1179 1180 compute_offset(_module_offset, 1181 k, vmSymbols::module_name(), 1182 vmSymbols::module_signature()); 1183 1184 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1185 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1186 // GC treats them the same. 1187 _init_lock_offset = _component_mirror_offset; 1188 1189 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1190 } 1191 1192 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1193 if (classRedefinedCount_offset == -1) { 1194 // If we don't have an offset for it then just return -1 as a marker. 1195 return -1; 1196 } 1197 1198 return the_class_mirror->int_field(classRedefinedCount_offset); 1199 } 1200 1201 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1202 if (classRedefinedCount_offset == -1) { 1203 // If we don't have an offset for it then nothing to set. 1204 return; 1205 } 1206 1207 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1208 } 1209 1210 1211 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1212 // platform thread structure, and a eetop offset which was used for thread 1213 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1214 // merged, so in the HotSpot VM we just use the eetop field for the thread 1215 // instead of the privateInfo_offset. 1216 // 1217 // Note: The stackSize field is only present starting in 1.4. 1218 1219 int java_lang_Thread::_name_offset = 0; 1220 int java_lang_Thread::_group_offset = 0; 1221 int java_lang_Thread::_contextClassLoader_offset = 0; 1222 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1223 int java_lang_Thread::_priority_offset = 0; 1224 int java_lang_Thread::_eetop_offset = 0; 1225 int java_lang_Thread::_daemon_offset = 0; 1226 int java_lang_Thread::_stillborn_offset = 0; 1227 int java_lang_Thread::_stackSize_offset = 0; 1228 int java_lang_Thread::_tid_offset = 0; 1229 int java_lang_Thread::_thread_status_offset = 0; 1230 int java_lang_Thread::_park_blocker_offset = 0; 1231 int java_lang_Thread::_park_event_offset = 0 ; 1232 1233 1234 void java_lang_Thread::compute_offsets() { 1235 assert(_group_offset == 0, "offsets should be initialized only once"); 1236 1237 Klass* k = SystemDictionary::Thread_klass(); 1238 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1239 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1240 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1241 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1242 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1243 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1244 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1245 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1246 // The stackSize field is only present starting in 1.4, so don't go fatal. 1247 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1248 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1249 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1250 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1251 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1252 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1253 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1254 vmSymbols::long_signature()); 1255 } 1256 1257 1258 JavaThread* java_lang_Thread::thread(oop java_thread) { 1259 return (JavaThread*)java_thread->address_field(_eetop_offset); 1260 } 1261 1262 1263 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1264 java_thread->address_field_put(_eetop_offset, (address)thread); 1265 } 1266 1267 1268 oop java_lang_Thread::name(oop java_thread) { 1269 return java_thread->obj_field(_name_offset); 1270 } 1271 1272 1273 void java_lang_Thread::set_name(oop java_thread, oop name) { 1274 java_thread->obj_field_put(_name_offset, name); 1275 } 1276 1277 1278 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1279 return (ThreadPriority)java_thread->int_field(_priority_offset); 1280 } 1281 1282 1283 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1284 java_thread->int_field_put(_priority_offset, priority); 1285 } 1286 1287 1288 oop java_lang_Thread::threadGroup(oop java_thread) { 1289 return java_thread->obj_field(_group_offset); 1290 } 1291 1292 1293 bool java_lang_Thread::is_stillborn(oop java_thread) { 1294 return java_thread->bool_field(_stillborn_offset) != 0; 1295 } 1296 1297 1298 // We never have reason to turn the stillborn bit off 1299 void java_lang_Thread::set_stillborn(oop java_thread) { 1300 java_thread->bool_field_put(_stillborn_offset, true); 1301 } 1302 1303 1304 bool java_lang_Thread::is_alive(oop java_thread) { 1305 JavaThread* thr = java_lang_Thread::thread(java_thread); 1306 return (thr != NULL); 1307 } 1308 1309 1310 bool java_lang_Thread::is_daemon(oop java_thread) { 1311 return java_thread->bool_field(_daemon_offset) != 0; 1312 } 1313 1314 1315 void java_lang_Thread::set_daemon(oop java_thread) { 1316 java_thread->bool_field_put(_daemon_offset, true); 1317 } 1318 1319 oop java_lang_Thread::context_class_loader(oop java_thread) { 1320 return java_thread->obj_field(_contextClassLoader_offset); 1321 } 1322 1323 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1324 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1325 } 1326 1327 1328 jlong java_lang_Thread::stackSize(oop java_thread) { 1329 if (_stackSize_offset > 0) { 1330 return java_thread->long_field(_stackSize_offset); 1331 } else { 1332 return 0; 1333 } 1334 } 1335 1336 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1337 void java_lang_Thread::set_thread_status(oop java_thread, 1338 java_lang_Thread::ThreadStatus status) { 1339 // The threadStatus is only present starting in 1.5 1340 if (_thread_status_offset > 0) { 1341 java_thread->int_field_put(_thread_status_offset, status); 1342 } 1343 } 1344 1345 // Read thread status value from threadStatus field in java.lang.Thread java class. 1346 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1347 // Make sure the caller is operating on behalf of the VM or is 1348 // running VM code (state == _thread_in_vm). 1349 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1350 JavaThread::current()->thread_state() == _thread_in_vm, 1351 "Java Thread is not running in vm"); 1352 // The threadStatus is only present starting in 1.5 1353 if (_thread_status_offset > 0) { 1354 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1355 } else { 1356 // All we can easily figure out is if it is alive, but that is 1357 // enough info for a valid unknown status. 1358 // These aren't restricted to valid set ThreadStatus values, so 1359 // use JVMTI values and cast. 1360 JavaThread* thr = java_lang_Thread::thread(java_thread); 1361 if (thr == NULL) { 1362 // the thread hasn't run yet or is in the process of exiting 1363 return NEW; 1364 } 1365 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1366 } 1367 } 1368 1369 1370 jlong java_lang_Thread::thread_id(oop java_thread) { 1371 // The thread ID field is only present starting in 1.5 1372 if (_tid_offset > 0) { 1373 return java_thread->long_field(_tid_offset); 1374 } else { 1375 return 0; 1376 } 1377 } 1378 1379 oop java_lang_Thread::park_blocker(oop java_thread) { 1380 assert(JDK_Version::current().supports_thread_park_blocker() && 1381 _park_blocker_offset != 0, "Must support parkBlocker field"); 1382 1383 if (_park_blocker_offset > 0) { 1384 return java_thread->obj_field(_park_blocker_offset); 1385 } 1386 1387 return NULL; 1388 } 1389 1390 jlong java_lang_Thread::park_event(oop java_thread) { 1391 if (_park_event_offset > 0) { 1392 return java_thread->long_field(_park_event_offset); 1393 } 1394 return 0; 1395 } 1396 1397 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1398 if (_park_event_offset > 0) { 1399 java_thread->long_field_put(_park_event_offset, ptr); 1400 return true; 1401 } 1402 return false; 1403 } 1404 1405 1406 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1407 assert(_thread_status_offset != 0, "Must have thread status"); 1408 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1409 switch (status) { 1410 case NEW : return "NEW"; 1411 case RUNNABLE : return "RUNNABLE"; 1412 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1413 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1414 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1415 case PARKED : return "WAITING (parking)"; 1416 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1417 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1418 case TERMINATED : return "TERMINATED"; 1419 default : return "UNKNOWN"; 1420 }; 1421 } 1422 int java_lang_ThreadGroup::_parent_offset = 0; 1423 int java_lang_ThreadGroup::_name_offset = 0; 1424 int java_lang_ThreadGroup::_threads_offset = 0; 1425 int java_lang_ThreadGroup::_groups_offset = 0; 1426 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1427 int java_lang_ThreadGroup::_destroyed_offset = 0; 1428 int java_lang_ThreadGroup::_daemon_offset = 0; 1429 int java_lang_ThreadGroup::_nthreads_offset = 0; 1430 int java_lang_ThreadGroup::_ngroups_offset = 0; 1431 1432 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1433 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1434 return java_thread_group->obj_field(_parent_offset); 1435 } 1436 1437 // ("name as oop" accessor is not necessary) 1438 1439 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1440 oop name = java_thread_group->obj_field(_name_offset); 1441 // ThreadGroup.name can be null 1442 if (name != NULL) { 1443 return java_lang_String::as_utf8_string(name); 1444 } 1445 return NULL; 1446 } 1447 1448 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1449 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1450 return java_thread_group->int_field(_nthreads_offset); 1451 } 1452 1453 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1454 oop threads = java_thread_group->obj_field(_threads_offset); 1455 assert(threads != NULL, "threadgroups should have threads"); 1456 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1457 return objArrayOop(threads); 1458 } 1459 1460 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1461 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1462 return java_thread_group->int_field(_ngroups_offset); 1463 } 1464 1465 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1466 oop groups = java_thread_group->obj_field(_groups_offset); 1467 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1468 return objArrayOop(groups); 1469 } 1470 1471 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1472 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1473 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1474 } 1475 1476 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1477 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1478 return java_thread_group->bool_field(_destroyed_offset) != 0; 1479 } 1480 1481 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1482 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1483 return java_thread_group->bool_field(_daemon_offset) != 0; 1484 } 1485 1486 void java_lang_ThreadGroup::compute_offsets() { 1487 assert(_parent_offset == 0, "offsets should be initialized only once"); 1488 1489 Klass* k = SystemDictionary::ThreadGroup_klass(); 1490 1491 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1492 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1493 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1494 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1495 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1496 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1497 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1498 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1499 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1500 } 1501 1502 1503 void java_lang_Throwable::compute_offsets() { 1504 Klass* k = SystemDictionary::Throwable_klass(); 1505 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1506 } 1507 1508 oop java_lang_Throwable::unassigned_stacktrace() { 1509 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1510 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1511 if (UseCompressedOops) { 1512 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1513 } else { 1514 return oopDesc::load_decode_heap_oop((oop*)addr); 1515 } 1516 } 1517 1518 oop java_lang_Throwable::backtrace(oop throwable) { 1519 return throwable->obj_field_acquire(backtrace_offset); 1520 } 1521 1522 1523 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1524 throwable->release_obj_field_put(backtrace_offset, value); 1525 } 1526 1527 int java_lang_Throwable::depth(oop throwable) { 1528 return throwable->int_field(depth_offset); 1529 } 1530 1531 void java_lang_Throwable::set_depth(oop throwable, int value) { 1532 throwable->int_field_put(depth_offset, value); 1533 } 1534 1535 oop java_lang_Throwable::message(oop throwable) { 1536 return throwable->obj_field(detailMessage_offset); 1537 } 1538 1539 1540 // Return Symbol for detailed_message or NULL 1541 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1542 PRESERVE_EXCEPTION_MARK; // Keep original exception 1543 oop detailed_message = java_lang_Throwable::message(throwable); 1544 if (detailed_message != NULL) { 1545 return java_lang_String::as_symbol(detailed_message, THREAD); 1546 } 1547 return NULL; 1548 } 1549 1550 void java_lang_Throwable::set_message(oop throwable, oop value) { 1551 throwable->obj_field_put(detailMessage_offset, value); 1552 } 1553 1554 1555 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1556 throwable->obj_field_put(stackTrace_offset, st_element_array); 1557 } 1558 1559 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1560 set_stacktrace(throwable, NULL); 1561 } 1562 1563 1564 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1565 ResourceMark rm; 1566 Klass* k = throwable->klass(); 1567 assert(k != NULL, "just checking"); 1568 st->print("%s", k->external_name()); 1569 oop msg = message(throwable); 1570 if (msg != NULL) { 1571 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1572 } 1573 } 1574 1575 // After this many redefines, the stack trace is unreliable. 1576 const int MAX_VERSION = USHRT_MAX; 1577 1578 static inline bool version_matches(Method* method, int version) { 1579 assert(version < MAX_VERSION, "version is too big"); 1580 return method != NULL && (method->constants()->version() == version); 1581 } 1582 1583 1584 // This class provides a simple wrapper over the internal structure of 1585 // exception backtrace to insulate users of the backtrace from needing 1586 // to know what it looks like. 1587 class BacktraceBuilder: public StackObj { 1588 friend class BacktraceIterator; 1589 private: 1590 Handle _backtrace; 1591 objArrayOop _head; 1592 typeArrayOop _methods; 1593 typeArrayOop _bcis; 1594 objArrayOop _mirrors; 1595 typeArrayOop _names; // needed to insulate method name against redefinition 1596 int _index; 1597 NoSafepointVerifier _nsv; 1598 1599 enum { 1600 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1601 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1602 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1603 trace_names_offset = java_lang_Throwable::trace_names_offset, 1604 trace_next_offset = java_lang_Throwable::trace_next_offset, 1605 trace_size = java_lang_Throwable::trace_size, 1606 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1607 }; 1608 1609 // get info out of chunks 1610 static typeArrayOop get_methods(objArrayHandle chunk) { 1611 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1612 assert(methods != NULL, "method array should be initialized in backtrace"); 1613 return methods; 1614 } 1615 static typeArrayOop get_bcis(objArrayHandle chunk) { 1616 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1617 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1618 return bcis; 1619 } 1620 static objArrayOop get_mirrors(objArrayHandle chunk) { 1621 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1622 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1623 return mirrors; 1624 } 1625 static typeArrayOop get_names(objArrayHandle chunk) { 1626 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1627 assert(names != NULL, "names array should be initialized in backtrace"); 1628 return names; 1629 } 1630 1631 public: 1632 1633 // constructor for new backtrace 1634 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1635 expand(CHECK); 1636 _backtrace = Handle(THREAD, _head); 1637 _index = 0; 1638 } 1639 1640 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1641 _methods = get_methods(backtrace); 1642 _bcis = get_bcis(backtrace); 1643 _mirrors = get_mirrors(backtrace); 1644 _names = get_names(backtrace); 1645 assert(_methods->length() == _bcis->length() && 1646 _methods->length() == _mirrors->length() && 1647 _mirrors->length() == _names->length(), 1648 "method and source information arrays should match"); 1649 1650 // head is the preallocated backtrace 1651 _head = backtrace(); 1652 _backtrace = Handle(thread, _head); 1653 _index = 0; 1654 } 1655 1656 void expand(TRAPS) { 1657 objArrayHandle old_head(THREAD, _head); 1658 PauseNoSafepointVerifier pnsv(&_nsv); 1659 1660 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1661 objArrayHandle new_head(THREAD, head); 1662 1663 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1664 typeArrayHandle new_methods(THREAD, methods); 1665 1666 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1667 typeArrayHandle new_bcis(THREAD, bcis); 1668 1669 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1670 objArrayHandle new_mirrors(THREAD, mirrors); 1671 1672 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 1673 typeArrayHandle new_names(THREAD, names); 1674 1675 if (!old_head.is_null()) { 1676 old_head->obj_at_put(trace_next_offset, new_head()); 1677 } 1678 new_head->obj_at_put(trace_methods_offset, new_methods()); 1679 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1680 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1681 new_head->obj_at_put(trace_names_offset, new_names()); 1682 1683 _head = new_head(); 1684 _methods = new_methods(); 1685 _bcis = new_bcis(); 1686 _mirrors = new_mirrors(); 1687 _names = new_names(); 1688 _index = 0; 1689 } 1690 1691 oop backtrace() { 1692 return _backtrace(); 1693 } 1694 1695 inline void push(Method* method, int bci, TRAPS) { 1696 // Smear the -1 bci to 0 since the array only holds unsigned 1697 // shorts. The later line number lookup would just smear the -1 1698 // to a 0 even if it could be recorded. 1699 if (bci == SynchronizationEntryBCI) bci = 0; 1700 1701 if (_index >= trace_chunk_size) { 1702 methodHandle mhandle(THREAD, method); 1703 expand(CHECK); 1704 method = mhandle(); 1705 } 1706 1707 _methods->short_at_put(_index, method->orig_method_idnum()); 1708 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1709 1710 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 1711 // klass owning the symbols alive so their refcounts aren't decremented. 1712 Symbol* name = method->name(); 1713 _names->symbol_at_put(_index, name); 1714 1715 // We need to save the mirrors in the backtrace to keep the class 1716 // from being unloaded while we still have this stack trace. 1717 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1718 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1719 _index++; 1720 } 1721 1722 }; 1723 1724 struct BacktraceElement : public StackObj { 1725 int _method_id; 1726 int _bci; 1727 int _version; 1728 Symbol* _name; 1729 Handle _mirror; 1730 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 1731 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 1732 }; 1733 1734 class BacktraceIterator : public StackObj { 1735 int _index; 1736 objArrayHandle _result; 1737 objArrayHandle _mirrors; 1738 typeArrayHandle _methods; 1739 typeArrayHandle _bcis; 1740 typeArrayHandle _names; 1741 1742 void init(objArrayHandle result, Thread* thread) { 1743 // Get method id, bci, version and mirror from chunk 1744 _result = result; 1745 if (_result.not_null()) { 1746 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1747 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1748 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1749 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 1750 _index = 0; 1751 } 1752 } 1753 public: 1754 BacktraceIterator(objArrayHandle result, Thread* thread) { 1755 init(result, thread); 1756 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1757 } 1758 1759 BacktraceElement next(Thread* thread) { 1760 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1761 _methods->short_at(_index), 1762 Backtrace::version_at(_bcis->int_at(_index)), 1763 Backtrace::bci_at(_bcis->int_at(_index)), 1764 _names->symbol_at(_index)); 1765 _index++; 1766 1767 if (_index >= java_lang_Throwable::trace_chunk_size) { 1768 int next_offset = java_lang_Throwable::trace_next_offset; 1769 // Get next chunk 1770 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1771 init(result, thread); 1772 } 1773 return e; 1774 } 1775 1776 bool repeat() { 1777 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1778 } 1779 }; 1780 1781 1782 // Print stack trace element to resource allocated buffer 1783 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1784 int version, int bci, Symbol* name) { 1785 ResourceMark rm; 1786 1787 // Get strings and string lengths 1788 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1789 const char* klass_name = holder->external_name(); 1790 int buf_len = (int)strlen(klass_name); 1791 1792 char* method_name = name->as_C_string(); 1793 buf_len += (int)strlen(method_name); 1794 1795 char* source_file_name = NULL; 1796 Symbol* source = Backtrace::get_source_file_name(holder, version); 1797 if (source != NULL) { 1798 source_file_name = source->as_C_string(); 1799 buf_len += (int)strlen(source_file_name); 1800 } 1801 1802 char *module_name = NULL, *module_version = NULL; 1803 ModuleEntry* module = holder->module(); 1804 if (module->is_named()) { 1805 module_name = module->name()->as_C_string(); 1806 buf_len += (int)strlen(module_name); 1807 if (module->version() != NULL) { 1808 module_version = module->version()->as_C_string(); 1809 buf_len += (int)strlen(module_version); 1810 } 1811 } 1812 1813 // Allocate temporary buffer with extra space for formatting and line number 1814 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1815 1816 // Print stack trace line in buffer 1817 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1818 1819 // Print module information 1820 if (module_name != NULL) { 1821 if (module_version != NULL) { 1822 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1823 } else { 1824 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1825 } 1826 } 1827 1828 // The method can be NULL if the requested class version is gone 1829 Method* method = holder->method_with_orig_idnum(method_id, version); 1830 if (!version_matches(method, version)) { 1831 strcat(buf, "Redefined)"); 1832 } else { 1833 int line_number = Backtrace::get_line_number(method, bci); 1834 if (line_number == -2) { 1835 strcat(buf, "Native Method)"); 1836 } else { 1837 if (source_file_name != NULL && (line_number != -1)) { 1838 // Sourcename and linenumber 1839 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1840 } else if (source_file_name != NULL) { 1841 // Just sourcename 1842 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1843 } else { 1844 // Neither sourcename nor linenumber 1845 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1846 } 1847 CompiledMethod* nm = method->code(); 1848 if (WizardMode && nm != NULL) { 1849 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1850 } 1851 } 1852 } 1853 1854 st->print_cr("%s", buf); 1855 } 1856 1857 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1858 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 1859 int method_id = method->orig_method_idnum(); 1860 int version = method->constants()->version(); 1861 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 1862 } 1863 1864 /** 1865 * Print the throwable message and its stack trace plus all causes by walking the 1866 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1867 */ 1868 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1869 // First, print the message. 1870 print(throwable(), st); 1871 st->cr(); 1872 1873 // Now print the stack trace. 1874 Thread* THREAD = Thread::current(); 1875 while (throwable.not_null()) { 1876 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1877 if (result.is_null()) { 1878 st->print_raw_cr("\t<<no stack trace available>>"); 1879 return; 1880 } 1881 BacktraceIterator iter(result, THREAD); 1882 1883 while (iter.repeat()) { 1884 BacktraceElement bte = iter.next(THREAD); 1885 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 1886 } 1887 { 1888 // Call getCause() which doesn't necessarily return the _cause field. 1889 EXCEPTION_MARK; 1890 JavaValue cause(T_OBJECT); 1891 JavaCalls::call_virtual(&cause, 1892 throwable, 1893 throwable->klass(), 1894 vmSymbols::getCause_name(), 1895 vmSymbols::void_throwable_signature(), 1896 THREAD); 1897 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1898 if (HAS_PENDING_EXCEPTION) { 1899 CLEAR_PENDING_EXCEPTION; 1900 throwable = Handle(); 1901 } else { 1902 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1903 if (throwable.not_null()) { 1904 st->print("Caused by: "); 1905 print(throwable(), st); 1906 st->cr(); 1907 } 1908 } 1909 } 1910 } 1911 } 1912 1913 /** 1914 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1915 */ 1916 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1917 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1918 JavaValue result(T_VOID); 1919 JavaCalls::call_virtual(&result, 1920 throwable, 1921 SystemDictionary::Throwable_klass(), 1922 vmSymbols::printStackTrace_name(), 1923 vmSymbols::void_method_signature(), 1924 THREAD); 1925 } 1926 1927 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1928 if (!StackTraceInThrowable) return; 1929 ResourceMark rm(THREAD); 1930 1931 // Start out by clearing the backtrace for this object, in case the VM 1932 // runs out of memory while allocating the stack trace 1933 set_backtrace(throwable(), NULL); 1934 // Clear lazily constructed Java level stacktrace if refilling occurs 1935 // This is unnecessary in 1.7+ but harmless 1936 clear_stacktrace(throwable()); 1937 1938 int max_depth = MaxJavaStackTraceDepth; 1939 JavaThread* thread = (JavaThread*)THREAD; 1940 1941 BacktraceBuilder bt(CHECK); 1942 1943 // If there is no Java frame just return the method that was being called 1944 // with bci 0 1945 if (!thread->has_last_Java_frame()) { 1946 if (max_depth >= 1 && method() != NULL) { 1947 bt.push(method(), 0, CHECK); 1948 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1949 set_depth(throwable(), 1); 1950 set_backtrace(throwable(), bt.backtrace()); 1951 } 1952 return; 1953 } 1954 1955 // Instead of using vframe directly, this version of fill_in_stack_trace 1956 // basically handles everything by hand. This significantly improved the 1957 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1958 // See bug 6333838 for more details. 1959 // The "ASSERT" here is to verify this method generates the exactly same stack 1960 // trace as utilizing vframe. 1961 #ifdef ASSERT 1962 vframeStream st(thread); 1963 methodHandle st_method(THREAD, st.method()); 1964 #endif 1965 int total_count = 0; 1966 RegisterMap map(thread, false); 1967 int decode_offset = 0; 1968 CompiledMethod* nm = NULL; 1969 bool skip_fillInStackTrace_check = false; 1970 bool skip_throwableInit_check = false; 1971 bool skip_hidden = !ShowHiddenFrames; 1972 1973 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1974 Method* method = NULL; 1975 int bci = 0; 1976 1977 // Compiled java method case. 1978 if (decode_offset != 0) { 1979 DebugInfoReadStream stream(nm, decode_offset); 1980 decode_offset = stream.read_int(); 1981 method = (Method*)nm->metadata_at(stream.read_int()); 1982 bci = stream.read_bci(); 1983 } else { 1984 if (fr.is_first_frame()) break; 1985 address pc = fr.pc(); 1986 if (fr.is_interpreted_frame()) { 1987 address bcp = fr.interpreter_frame_bcp(); 1988 method = fr.interpreter_frame_method(); 1989 bci = method->bci_from(bcp); 1990 fr = fr.sender(&map); 1991 } else { 1992 CodeBlob* cb = fr.cb(); 1993 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1994 // but non nmethod 1995 fr = fr.sender(&map); 1996 if (cb == NULL || !cb->is_compiled()) { 1997 continue; 1998 } 1999 nm = cb->as_compiled_method(); 2000 if (nm->method()->is_native()) { 2001 method = nm->method(); 2002 bci = 0; 2003 } else { 2004 PcDesc* pd = nm->pc_desc_at(pc); 2005 decode_offset = pd->scope_decode_offset(); 2006 // if decode_offset is not equal to 0, it will execute the 2007 // "compiled java method case" at the beginning of the loop. 2008 continue; 2009 } 2010 } 2011 } 2012 #ifdef ASSERT 2013 assert(st_method() == method && st.bci() == bci, 2014 "Wrong stack trace"); 2015 st.next(); 2016 // vframeStream::method isn't GC-safe so store off a copy 2017 // of the Method* in case we GC. 2018 if (!st.at_end()) { 2019 st_method = st.method(); 2020 } 2021 #endif 2022 2023 // the format of the stacktrace will be: 2024 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2025 // - 0 or more <init> methods for the exception class (skipped) 2026 // - rest of the stack 2027 2028 if (!skip_fillInStackTrace_check) { 2029 if (method->name() == vmSymbols::fillInStackTrace_name() && 2030 throwable->is_a(method->method_holder())) { 2031 continue; 2032 } 2033 else { 2034 skip_fillInStackTrace_check = true; // gone past them all 2035 } 2036 } 2037 if (!skip_throwableInit_check) { 2038 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2039 2040 // skip <init> methods of the exception class and superclasses 2041 // This is simlar to classic VM. 2042 if (method->name() == vmSymbols::object_initializer_name() && 2043 throwable->is_a(method->method_holder())) { 2044 continue; 2045 } else { 2046 // there are none or we've seen them all - either way stop checking 2047 skip_throwableInit_check = true; 2048 } 2049 } 2050 if (method->is_hidden()) { 2051 if (skip_hidden) continue; 2052 } 2053 bt.push(method, bci, CHECK); 2054 total_count++; 2055 } 2056 2057 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2058 2059 // Put completed stack trace into throwable object 2060 set_backtrace(throwable(), bt.backtrace()); 2061 set_depth(throwable(), total_count); 2062 } 2063 2064 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2065 // No-op if stack trace is disabled 2066 if (!StackTraceInThrowable) { 2067 return; 2068 } 2069 2070 // Disable stack traces for some preallocated out of memory errors 2071 if (!Universe::should_fill_in_stack_trace(throwable)) { 2072 return; 2073 } 2074 2075 PRESERVE_EXCEPTION_MARK; 2076 2077 JavaThread* thread = JavaThread::active(); 2078 fill_in_stack_trace(throwable, method, thread); 2079 // ignore exceptions thrown during stack trace filling 2080 CLEAR_PENDING_EXCEPTION; 2081 } 2082 2083 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2084 // Allocate stack trace - backtrace is created but not filled in 2085 2086 // No-op if stack trace is disabled 2087 if (!StackTraceInThrowable) return; 2088 BacktraceBuilder bt(CHECK); // creates a backtrace 2089 set_backtrace(throwable(), bt.backtrace()); 2090 } 2091 2092 2093 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2094 // Fill in stack trace into preallocated backtrace (no GC) 2095 2096 // No-op if stack trace is disabled 2097 if (!StackTraceInThrowable) return; 2098 2099 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2100 2101 JavaThread* THREAD = JavaThread::current(); 2102 2103 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2104 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2105 2106 ResourceMark rm(THREAD); 2107 vframeStream st(THREAD); 2108 2109 BacktraceBuilder bt(THREAD, backtrace); 2110 2111 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2112 // methods as preallocated errors aren't created by "java" code. 2113 2114 // fill in as much stack trace as possible 2115 int chunk_count = 0; 2116 for (;!st.at_end(); st.next()) { 2117 bt.push(st.method(), st.bci(), CHECK); 2118 chunk_count++; 2119 2120 // Bail-out for deep stacks 2121 if (chunk_count >= trace_chunk_size) break; 2122 } 2123 set_depth(throwable(), chunk_count); 2124 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2125 2126 // We support the Throwable immutability protocol defined for Java 7. 2127 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2128 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2129 } 2130 2131 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2132 objArrayHandle stack_trace_array_h, TRAPS) { 2133 2134 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2135 THROW(vmSymbols::java_lang_NullPointerException()); 2136 } 2137 2138 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2139 2140 if (stack_trace_array_h->length() != depth(throwable())) { 2141 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2142 } 2143 2144 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2145 BacktraceIterator iter(result, THREAD); 2146 2147 int index = 0; 2148 while (iter.repeat()) { 2149 BacktraceElement bte = iter.next(THREAD); 2150 2151 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2152 2153 if (stack_trace_element.is_null()) { 2154 THROW(vmSymbols::java_lang_NullPointerException()); 2155 } 2156 2157 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2158 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2159 2160 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2161 method, 2162 bte._version, 2163 bte._bci, 2164 bte._name, CHECK); 2165 } 2166 } 2167 2168 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2169 // Allocate java.lang.StackTraceElement instance 2170 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2171 assert(k != NULL, "must be loaded in 1.4+"); 2172 if (k->should_be_initialized()) { 2173 k->initialize(CHECK_0); 2174 } 2175 2176 Handle element = k->allocate_instance_handle(CHECK_0); 2177 2178 int version = method->constants()->version(); 2179 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2180 return element(); 2181 } 2182 2183 void java_lang_StackTraceElement::fill_in(Handle element, 2184 InstanceKlass* holder, const methodHandle& method, 2185 int version, int bci, Symbol* name, TRAPS) { 2186 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2187 2188 // Fill in class name 2189 ResourceMark rm(THREAD); 2190 const char* str = holder->external_name(); 2191 oop classname = StringTable::intern((char*) str, CHECK); 2192 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2193 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2194 2195 oop loader = holder->class_loader(); 2196 if (loader != NULL) { 2197 oop loader_name = java_lang_ClassLoader::name(loader); 2198 if (loader_name != NULL) 2199 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2200 } 2201 2202 // Fill in method name 2203 oop methodname = StringTable::intern(name, CHECK); 2204 java_lang_StackTraceElement::set_methodName(element(), methodname); 2205 2206 // Fill in module name and version 2207 ModuleEntry* module = holder->module(); 2208 if (module->is_named()) { 2209 oop module_name = StringTable::intern(module->name(), CHECK); 2210 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2211 oop module_version; 2212 if (module->version() != NULL) { 2213 module_version = StringTable::intern(module->version(), CHECK); 2214 } else { 2215 module_version = NULL; 2216 } 2217 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2218 } 2219 2220 if (method() == NULL || !version_matches(method(), version)) { 2221 // The method was redefined, accurate line number information isn't available 2222 java_lang_StackTraceElement::set_fileName(element(), NULL); 2223 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2224 } else { 2225 // Fill in source file name and line number. 2226 Symbol* source = Backtrace::get_source_file_name(holder, version); 2227 if (ShowHiddenFrames && source == NULL) 2228 source = vmSymbols::unknown_class_name(); 2229 oop filename = StringTable::intern(source, CHECK); 2230 java_lang_StackTraceElement::set_fileName(element(), filename); 2231 2232 int line_number = Backtrace::get_line_number(method, bci); 2233 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2234 } 2235 } 2236 2237 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2238 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2239 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2240 // we should expand MemberName::name when Throwable uses StackTrace 2241 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2242 return method; 2243 } 2244 2245 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2246 // set Method* or mid/cpref 2247 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2248 InstanceKlass* ik = method->method_holder(); 2249 CallInfo info(method(), ik, CHECK); 2250 MethodHandles::init_method_MemberName(mname, info); 2251 // set bci 2252 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2253 // method may be redefined; store the version 2254 int version = method->constants()->version(); 2255 assert((jushort)version == version, "version should be short"); 2256 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2257 } 2258 2259 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2260 ResourceMark rm(THREAD); 2261 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2262 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2263 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2264 2265 short version = stackFrame->short_field(_version_offset); 2266 short bci = stackFrame->short_field(_bci_offset); 2267 Symbol* name = method->name(); 2268 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2269 } 2270 2271 void java_lang_StackFrameInfo::compute_offsets() { 2272 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2273 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2274 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2275 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2276 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2277 } 2278 2279 void java_lang_LiveStackFrameInfo::compute_offsets() { 2280 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2281 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2282 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2283 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2284 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature()); 2285 } 2286 2287 void java_lang_reflect_AccessibleObject::compute_offsets() { 2288 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2289 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2290 } 2291 2292 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2294 return (jboolean) reflect->bool_field(override_offset); 2295 } 2296 2297 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2299 reflect->bool_field_put(override_offset, (int) value); 2300 } 2301 2302 void java_lang_reflect_Method::compute_offsets() { 2303 Klass* k = SystemDictionary::reflect_Method_klass(); 2304 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2305 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2306 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2307 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2308 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2309 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2310 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2311 // The generic signature and annotations fields are only present in 1.5 2312 signature_offset = -1; 2313 annotations_offset = -1; 2314 parameter_annotations_offset = -1; 2315 annotation_default_offset = -1; 2316 type_annotations_offset = -1; 2317 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2318 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2319 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2320 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2321 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2322 } 2323 2324 Handle java_lang_reflect_Method::create(TRAPS) { 2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2326 Klass* klass = SystemDictionary::reflect_Method_klass(); 2327 // This class is eagerly initialized during VM initialization, since we keep a refence 2328 // to one of the methods 2329 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2330 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2331 } 2332 2333 oop java_lang_reflect_Method::clazz(oop reflect) { 2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2335 return reflect->obj_field(clazz_offset); 2336 } 2337 2338 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2339 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2340 reflect->obj_field_put(clazz_offset, value); 2341 } 2342 2343 int java_lang_reflect_Method::slot(oop reflect) { 2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2345 return reflect->int_field(slot_offset); 2346 } 2347 2348 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2350 reflect->int_field_put(slot_offset, value); 2351 } 2352 2353 oop java_lang_reflect_Method::name(oop method) { 2354 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2355 return method->obj_field(name_offset); 2356 } 2357 2358 void java_lang_reflect_Method::set_name(oop method, oop value) { 2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2360 method->obj_field_put(name_offset, value); 2361 } 2362 2363 oop java_lang_reflect_Method::return_type(oop method) { 2364 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2365 return method->obj_field(returnType_offset); 2366 } 2367 2368 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2370 method->obj_field_put(returnType_offset, value); 2371 } 2372 2373 oop java_lang_reflect_Method::parameter_types(oop method) { 2374 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2375 return method->obj_field(parameterTypes_offset); 2376 } 2377 2378 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2380 method->obj_field_put(parameterTypes_offset, value); 2381 } 2382 2383 oop java_lang_reflect_Method::exception_types(oop method) { 2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2385 return method->obj_field(exceptionTypes_offset); 2386 } 2387 2388 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2390 method->obj_field_put(exceptionTypes_offset, value); 2391 } 2392 2393 int java_lang_reflect_Method::modifiers(oop method) { 2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2395 return method->int_field(modifiers_offset); 2396 } 2397 2398 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2399 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2400 method->int_field_put(modifiers_offset, value); 2401 } 2402 2403 bool java_lang_reflect_Method::has_signature_field() { 2404 return (signature_offset >= 0); 2405 } 2406 2407 oop java_lang_reflect_Method::signature(oop method) { 2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2409 assert(has_signature_field(), "signature field must be present"); 2410 return method->obj_field(signature_offset); 2411 } 2412 2413 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2415 assert(has_signature_field(), "signature field must be present"); 2416 method->obj_field_put(signature_offset, value); 2417 } 2418 2419 bool java_lang_reflect_Method::has_annotations_field() { 2420 return (annotations_offset >= 0); 2421 } 2422 2423 oop java_lang_reflect_Method::annotations(oop method) { 2424 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2425 assert(has_annotations_field(), "annotations field must be present"); 2426 return method->obj_field(annotations_offset); 2427 } 2428 2429 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2431 assert(has_annotations_field(), "annotations field must be present"); 2432 method->obj_field_put(annotations_offset, value); 2433 } 2434 2435 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2436 return (parameter_annotations_offset >= 0); 2437 } 2438 2439 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2441 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2442 return method->obj_field(parameter_annotations_offset); 2443 } 2444 2445 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2446 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2447 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2448 method->obj_field_put(parameter_annotations_offset, value); 2449 } 2450 2451 bool java_lang_reflect_Method::has_annotation_default_field() { 2452 return (annotation_default_offset >= 0); 2453 } 2454 2455 oop java_lang_reflect_Method::annotation_default(oop method) { 2456 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2457 assert(has_annotation_default_field(), "annotation default field must be present"); 2458 return method->obj_field(annotation_default_offset); 2459 } 2460 2461 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2463 assert(has_annotation_default_field(), "annotation default field must be present"); 2464 method->obj_field_put(annotation_default_offset, value); 2465 } 2466 2467 bool java_lang_reflect_Method::has_type_annotations_field() { 2468 return (type_annotations_offset >= 0); 2469 } 2470 2471 oop java_lang_reflect_Method::type_annotations(oop method) { 2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2473 assert(has_type_annotations_field(), "type_annotations field must be present"); 2474 return method->obj_field(type_annotations_offset); 2475 } 2476 2477 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2478 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2479 assert(has_type_annotations_field(), "type_annotations field must be present"); 2480 method->obj_field_put(type_annotations_offset, value); 2481 } 2482 2483 void java_lang_reflect_Constructor::compute_offsets() { 2484 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2485 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2486 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2487 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2488 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2489 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2490 // The generic signature and annotations fields are only present in 1.5 2491 signature_offset = -1; 2492 annotations_offset = -1; 2493 parameter_annotations_offset = -1; 2494 type_annotations_offset = -1; 2495 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2496 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2497 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2498 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2499 } 2500 2501 Handle java_lang_reflect_Constructor::create(TRAPS) { 2502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2503 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2504 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2505 InstanceKlass* ik = InstanceKlass::cast(k); 2506 // Ensure it is initialized 2507 ik->initialize(CHECK_NH); 2508 return ik->allocate_instance_handle(THREAD); 2509 } 2510 2511 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2513 return reflect->obj_field(clazz_offset); 2514 } 2515 2516 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2518 reflect->obj_field_put(clazz_offset, value); 2519 } 2520 2521 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2522 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2523 return constructor->obj_field(parameterTypes_offset); 2524 } 2525 2526 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2528 constructor->obj_field_put(parameterTypes_offset, value); 2529 } 2530 2531 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2533 return constructor->obj_field(exceptionTypes_offset); 2534 } 2535 2536 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2538 constructor->obj_field_put(exceptionTypes_offset, value); 2539 } 2540 2541 int java_lang_reflect_Constructor::slot(oop reflect) { 2542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2543 return reflect->int_field(slot_offset); 2544 } 2545 2546 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2548 reflect->int_field_put(slot_offset, value); 2549 } 2550 2551 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2552 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2553 return constructor->int_field(modifiers_offset); 2554 } 2555 2556 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2558 constructor->int_field_put(modifiers_offset, value); 2559 } 2560 2561 bool java_lang_reflect_Constructor::has_signature_field() { 2562 return (signature_offset >= 0); 2563 } 2564 2565 oop java_lang_reflect_Constructor::signature(oop constructor) { 2566 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2567 assert(has_signature_field(), "signature field must be present"); 2568 return constructor->obj_field(signature_offset); 2569 } 2570 2571 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2572 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2573 assert(has_signature_field(), "signature field must be present"); 2574 constructor->obj_field_put(signature_offset, value); 2575 } 2576 2577 bool java_lang_reflect_Constructor::has_annotations_field() { 2578 return (annotations_offset >= 0); 2579 } 2580 2581 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2582 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2583 assert(has_annotations_field(), "annotations field must be present"); 2584 return constructor->obj_field(annotations_offset); 2585 } 2586 2587 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2588 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2589 assert(has_annotations_field(), "annotations field must be present"); 2590 constructor->obj_field_put(annotations_offset, value); 2591 } 2592 2593 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2594 return (parameter_annotations_offset >= 0); 2595 } 2596 2597 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2598 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2599 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2600 return method->obj_field(parameter_annotations_offset); 2601 } 2602 2603 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2604 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2605 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2606 method->obj_field_put(parameter_annotations_offset, value); 2607 } 2608 2609 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2610 return (type_annotations_offset >= 0); 2611 } 2612 2613 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2614 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2615 assert(has_type_annotations_field(), "type_annotations field must be present"); 2616 return constructor->obj_field(type_annotations_offset); 2617 } 2618 2619 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2621 assert(has_type_annotations_field(), "type_annotations field must be present"); 2622 constructor->obj_field_put(type_annotations_offset, value); 2623 } 2624 2625 void java_lang_reflect_Field::compute_offsets() { 2626 Klass* k = SystemDictionary::reflect_Field_klass(); 2627 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2628 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2629 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2630 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2631 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2632 // The generic signature and annotations fields are only present in 1.5 2633 signature_offset = -1; 2634 annotations_offset = -1; 2635 type_annotations_offset = -1; 2636 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2637 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2638 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2639 } 2640 2641 Handle java_lang_reflect_Field::create(TRAPS) { 2642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2643 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2644 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2645 InstanceKlass* ik = InstanceKlass::cast(k); 2646 // Ensure it is initialized 2647 ik->initialize(CHECK_NH); 2648 return ik->allocate_instance_handle(THREAD); 2649 } 2650 2651 oop java_lang_reflect_Field::clazz(oop reflect) { 2652 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2653 return reflect->obj_field(clazz_offset); 2654 } 2655 2656 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2658 reflect->obj_field_put(clazz_offset, value); 2659 } 2660 2661 oop java_lang_reflect_Field::name(oop field) { 2662 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2663 return field->obj_field(name_offset); 2664 } 2665 2666 void java_lang_reflect_Field::set_name(oop field, oop value) { 2667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2668 field->obj_field_put(name_offset, value); 2669 } 2670 2671 oop java_lang_reflect_Field::type(oop field) { 2672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2673 return field->obj_field(type_offset); 2674 } 2675 2676 void java_lang_reflect_Field::set_type(oop field, oop value) { 2677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2678 field->obj_field_put(type_offset, value); 2679 } 2680 2681 int java_lang_reflect_Field::slot(oop reflect) { 2682 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2683 return reflect->int_field(slot_offset); 2684 } 2685 2686 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2688 reflect->int_field_put(slot_offset, value); 2689 } 2690 2691 int java_lang_reflect_Field::modifiers(oop field) { 2692 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2693 return field->int_field(modifiers_offset); 2694 } 2695 2696 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2698 field->int_field_put(modifiers_offset, value); 2699 } 2700 2701 bool java_lang_reflect_Field::has_signature_field() { 2702 return (signature_offset >= 0); 2703 } 2704 2705 oop java_lang_reflect_Field::signature(oop field) { 2706 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2707 assert(has_signature_field(), "signature field must be present"); 2708 return field->obj_field(signature_offset); 2709 } 2710 2711 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2713 assert(has_signature_field(), "signature field must be present"); 2714 field->obj_field_put(signature_offset, value); 2715 } 2716 2717 bool java_lang_reflect_Field::has_annotations_field() { 2718 return (annotations_offset >= 0); 2719 } 2720 2721 oop java_lang_reflect_Field::annotations(oop field) { 2722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2723 assert(has_annotations_field(), "annotations field must be present"); 2724 return field->obj_field(annotations_offset); 2725 } 2726 2727 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2729 assert(has_annotations_field(), "annotations field must be present"); 2730 field->obj_field_put(annotations_offset, value); 2731 } 2732 2733 bool java_lang_reflect_Field::has_type_annotations_field() { 2734 return (type_annotations_offset >= 0); 2735 } 2736 2737 oop java_lang_reflect_Field::type_annotations(oop field) { 2738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2739 assert(has_type_annotations_field(), "type_annotations field must be present"); 2740 return field->obj_field(type_annotations_offset); 2741 } 2742 2743 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2745 assert(has_type_annotations_field(), "type_annotations field must be present"); 2746 field->obj_field_put(type_annotations_offset, value); 2747 } 2748 2749 void reflect_ConstantPool::compute_offsets() { 2750 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2751 // This null test can be removed post beta 2752 if (k != NULL) { 2753 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2754 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2755 } 2756 } 2757 2758 void java_lang_reflect_Parameter::compute_offsets() { 2759 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2760 if(NULL != k) { 2761 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2762 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2763 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2764 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2765 } 2766 } 2767 2768 Handle java_lang_reflect_Parameter::create(TRAPS) { 2769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2770 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2771 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2772 InstanceKlass* ik = InstanceKlass::cast(k); 2773 // Ensure it is initialized 2774 ik->initialize(CHECK_NH); 2775 return ik->allocate_instance_handle(THREAD); 2776 } 2777 2778 oop java_lang_reflect_Parameter::name(oop param) { 2779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2780 return param->obj_field(name_offset); 2781 } 2782 2783 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2785 param->obj_field_put(name_offset, value); 2786 } 2787 2788 int java_lang_reflect_Parameter::modifiers(oop param) { 2789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2790 return param->int_field(modifiers_offset); 2791 } 2792 2793 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2795 param->int_field_put(modifiers_offset, value); 2796 } 2797 2798 int java_lang_reflect_Parameter::index(oop param) { 2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2800 return param->int_field(index_offset); 2801 } 2802 2803 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2805 param->int_field_put(index_offset, value); 2806 } 2807 2808 oop java_lang_reflect_Parameter::executable(oop param) { 2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2810 return param->obj_field(executable_offset); 2811 } 2812 2813 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2815 param->obj_field_put(executable_offset, value); 2816 } 2817 2818 2819 int java_lang_Module::loader_offset; 2820 int java_lang_Module::name_offset; 2821 int java_lang_Module::_module_entry_offset = -1; 2822 2823 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2825 2826 Symbol* name = vmSymbols::java_lang_Module(); 2827 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2828 InstanceKlass* ik = InstanceKlass::cast(k); 2829 Handle jlmh = ik->allocate_instance_handle(CHECK_NH); 2830 JavaValue result(T_VOID); 2831 JavaCalls::call_special(&result, jlmh, ik, 2832 vmSymbols::object_initializer_name(), 2833 vmSymbols::java_lang_module_init_signature(), 2834 loader, module_name, CHECK_NH); 2835 return jlmh; 2836 } 2837 2838 void java_lang_Module::compute_offsets() { 2839 Klass* k = SystemDictionary::Module_klass(); 2840 if(NULL != k) { 2841 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2842 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2843 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2844 } 2845 } 2846 2847 2848 oop java_lang_Module::loader(oop module) { 2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2850 return module->obj_field(loader_offset); 2851 } 2852 2853 void java_lang_Module::set_loader(oop module, oop value) { 2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2855 module->obj_field_put(loader_offset, value); 2856 } 2857 2858 oop java_lang_Module::name(oop module) { 2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2860 return module->obj_field(name_offset); 2861 } 2862 2863 void java_lang_Module::set_name(oop module, oop value) { 2864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2865 module->obj_field_put(name_offset, value); 2866 } 2867 2868 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) { 2869 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2870 assert(module != NULL, "module can't be null"); 2871 assert(oopDesc::is_oop(module), "module must be oop"); 2872 2873 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2874 if (module_entry == NULL) { 2875 // If the inject field containing the ModuleEntry* is null then return the 2876 // class loader's unnamed module. 2877 oop loader = java_lang_Module::loader(module); 2878 Handle h_loader = Handle(THREAD, loader); 2879 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2880 return loader_cld->unnamed_module(); 2881 } 2882 return module_entry; 2883 } 2884 2885 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2886 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2887 assert(module != NULL, "module can't be null"); 2888 assert(oopDesc::is_oop(module), "module must be oop"); 2889 module->address_field_put(_module_entry_offset, (address)module_entry); 2890 } 2891 2892 Handle reflect_ConstantPool::create(TRAPS) { 2893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2894 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 2895 // Ensure it is initialized 2896 k->initialize(CHECK_NH); 2897 return k->allocate_instance_handle(THREAD); 2898 } 2899 2900 2901 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2903 oop mirror = value->pool_holder()->java_mirror(); 2904 // Save the mirror to get back the constant pool. 2905 reflect->obj_field_put(_oop_offset, mirror); 2906 } 2907 2908 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2910 2911 oop mirror = reflect->obj_field(_oop_offset); 2912 Klass* k = java_lang_Class::as_Klass(mirror); 2913 assert(k->is_instance_klass(), "Must be"); 2914 2915 // Get the constant pool back from the klass. Since class redefinition 2916 // merges the new constant pool into the old, this is essentially the 2917 // same constant pool as the original. If constant pool merging is 2918 // no longer done in the future, this will have to change to save 2919 // the original. 2920 return InstanceKlass::cast(k)->constants(); 2921 } 2922 2923 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2924 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2925 // This null test can be removed post beta 2926 if (k != NULL) { 2927 compute_offset(_base_offset, k, 2928 vmSymbols::base_name(), vmSymbols::object_signature()); 2929 } 2930 } 2931 2932 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2933 Klass* k = SystemDictionary::box_klass(type); 2934 if (k == NULL) return NULL; 2935 InstanceKlass* ik = InstanceKlass::cast(k); 2936 if (!ik->is_initialized()) ik->initialize(CHECK_0); 2937 return ik->allocate_instance(THREAD); 2938 } 2939 2940 2941 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2942 oop box = initialize_and_allocate(type, CHECK_0); 2943 if (box == NULL) return NULL; 2944 switch (type) { 2945 case T_BOOLEAN: 2946 box->bool_field_put(value_offset, value->z); 2947 break; 2948 case T_CHAR: 2949 box->char_field_put(value_offset, value->c); 2950 break; 2951 case T_FLOAT: 2952 box->float_field_put(value_offset, value->f); 2953 break; 2954 case T_DOUBLE: 2955 box->double_field_put(long_value_offset, value->d); 2956 break; 2957 case T_BYTE: 2958 box->byte_field_put(value_offset, value->b); 2959 break; 2960 case T_SHORT: 2961 box->short_field_put(value_offset, value->s); 2962 break; 2963 case T_INT: 2964 box->int_field_put(value_offset, value->i); 2965 break; 2966 case T_LONG: 2967 box->long_field_put(long_value_offset, value->j); 2968 break; 2969 default: 2970 return NULL; 2971 } 2972 return box; 2973 } 2974 2975 2976 BasicType java_lang_boxing_object::basic_type(oop box) { 2977 if (box == NULL) return T_ILLEGAL; 2978 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2979 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2980 return T_ILLEGAL; 2981 return type; 2982 } 2983 2984 2985 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2986 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2987 switch (type) { 2988 case T_BOOLEAN: 2989 value->z = box->bool_field(value_offset); 2990 break; 2991 case T_CHAR: 2992 value->c = box->char_field(value_offset); 2993 break; 2994 case T_FLOAT: 2995 value->f = box->float_field(value_offset); 2996 break; 2997 case T_DOUBLE: 2998 value->d = box->double_field(long_value_offset); 2999 break; 3000 case T_BYTE: 3001 value->b = box->byte_field(value_offset); 3002 break; 3003 case T_SHORT: 3004 value->s = box->short_field(value_offset); 3005 break; 3006 case T_INT: 3007 value->i = box->int_field(value_offset); 3008 break; 3009 case T_LONG: 3010 value->j = box->long_field(long_value_offset); 3011 break; 3012 default: 3013 return T_ILLEGAL; 3014 } // end switch 3015 return type; 3016 } 3017 3018 3019 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3020 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3021 switch (type) { 3022 case T_BOOLEAN: 3023 box->bool_field_put(value_offset, value->z); 3024 break; 3025 case T_CHAR: 3026 box->char_field_put(value_offset, value->c); 3027 break; 3028 case T_FLOAT: 3029 box->float_field_put(value_offset, value->f); 3030 break; 3031 case T_DOUBLE: 3032 box->double_field_put(long_value_offset, value->d); 3033 break; 3034 case T_BYTE: 3035 box->byte_field_put(value_offset, value->b); 3036 break; 3037 case T_SHORT: 3038 box->short_field_put(value_offset, value->s); 3039 break; 3040 case T_INT: 3041 box->int_field_put(value_offset, value->i); 3042 break; 3043 case T_LONG: 3044 box->long_field_put(long_value_offset, value->j); 3045 break; 3046 default: 3047 return T_ILLEGAL; 3048 } // end switch 3049 return type; 3050 } 3051 3052 3053 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3054 switch (type) { 3055 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3056 case T_CHAR: st->print("%d", value->c); break; 3057 case T_BYTE: st->print("%d", value->b); break; 3058 case T_SHORT: st->print("%d", value->s); break; 3059 case T_INT: st->print("%d", value->i); break; 3060 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3061 case T_FLOAT: st->print("%f", value->f); break; 3062 case T_DOUBLE: st->print("%lf", value->d); break; 3063 default: st->print("type %d?", type); break; 3064 } 3065 } 3066 3067 // Support for java_lang_ref_SoftReference 3068 3069 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3070 return ref->long_field(timestamp_offset); 3071 } 3072 3073 jlong java_lang_ref_SoftReference::clock() { 3074 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3075 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3076 return *offset; 3077 } 3078 3079 void java_lang_ref_SoftReference::set_clock(jlong value) { 3080 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3081 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3082 *offset = value; 3083 } 3084 3085 // Support for java_lang_invoke_DirectMethodHandle 3086 3087 int java_lang_invoke_DirectMethodHandle::_member_offset; 3088 3089 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3090 oop member_name = NULL; 3091 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3092 "a DirectMethodHandle oop is expected"); 3093 return dmh->obj_field(member_offset_in_bytes()); 3094 } 3095 3096 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3097 Klass* k = SystemDictionary::DirectMethodHandle_klass(); 3098 if (k != NULL) { 3099 compute_offset(_member_offset, k, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3100 } 3101 } 3102 3103 // Support for java_lang_invoke_MethodHandle 3104 3105 int java_lang_invoke_MethodHandle::_type_offset; 3106 int java_lang_invoke_MethodHandle::_form_offset; 3107 3108 int java_lang_invoke_MemberName::_clazz_offset; 3109 int java_lang_invoke_MemberName::_name_offset; 3110 int java_lang_invoke_MemberName::_type_offset; 3111 int java_lang_invoke_MemberName::_flags_offset; 3112 int java_lang_invoke_MemberName::_method_offset; 3113 int java_lang_invoke_MemberName::_vmindex_offset; 3114 3115 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3116 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3117 3118 int java_lang_invoke_LambdaForm::_vmentry_offset; 3119 3120 void java_lang_invoke_MethodHandle::compute_offsets() { 3121 Klass* k = SystemDictionary::MethodHandle_klass(); 3122 if (k != NULL) { 3123 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3124 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3125 } 3126 } 3127 3128 void java_lang_invoke_MemberName::compute_offsets() { 3129 Klass* k = SystemDictionary::MemberName_klass(); 3130 assert (k != NULL, "jdk mismatch"); 3131 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3132 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 3133 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 3134 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 3135 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature()); 3136 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3137 } 3138 3139 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3140 Klass* k = SystemDictionary::ResolvedMethodName_klass(); 3141 assert(k != NULL, "jdk mismatch"); 3142 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3143 } 3144 3145 void java_lang_invoke_LambdaForm::compute_offsets() { 3146 Klass* k = SystemDictionary::LambdaForm_klass(); 3147 assert (k != NULL, "jdk mismatch"); 3148 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3149 } 3150 3151 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3152 return obj != NULL && is_subclass(obj->klass()); 3153 } 3154 3155 3156 oop java_lang_invoke_MethodHandle::type(oop mh) { 3157 return mh->obj_field(_type_offset); 3158 } 3159 3160 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3161 mh->obj_field_put(_type_offset, mtype); 3162 } 3163 3164 oop java_lang_invoke_MethodHandle::form(oop mh) { 3165 assert(_form_offset != 0, ""); 3166 return mh->obj_field(_form_offset); 3167 } 3168 3169 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3170 assert(_form_offset != 0, ""); 3171 mh->obj_field_put(_form_offset, lform); 3172 } 3173 3174 /// MemberName accessors 3175 3176 oop java_lang_invoke_MemberName::clazz(oop mname) { 3177 assert(is_instance(mname), "wrong type"); 3178 return mname->obj_field(_clazz_offset); 3179 } 3180 3181 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3182 assert(is_instance(mname), "wrong type"); 3183 mname->obj_field_put(_clazz_offset, clazz); 3184 } 3185 3186 oop java_lang_invoke_MemberName::name(oop mname) { 3187 assert(is_instance(mname), "wrong type"); 3188 return mname->obj_field(_name_offset); 3189 } 3190 3191 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3192 assert(is_instance(mname), "wrong type"); 3193 mname->obj_field_put(_name_offset, name); 3194 } 3195 3196 oop java_lang_invoke_MemberName::type(oop mname) { 3197 assert(is_instance(mname), "wrong type"); 3198 return mname->obj_field(_type_offset); 3199 } 3200 3201 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3202 assert(is_instance(mname), "wrong type"); 3203 mname->obj_field_put(_type_offset, type); 3204 } 3205 3206 int java_lang_invoke_MemberName::flags(oop mname) { 3207 assert(is_instance(mname), "wrong type"); 3208 return mname->int_field(_flags_offset); 3209 } 3210 3211 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3212 assert(is_instance(mname), "wrong type"); 3213 mname->int_field_put(_flags_offset, flags); 3214 } 3215 3216 3217 // Return vmtarget from ResolvedMethodName method field through indirection 3218 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3219 assert(is_instance(mname), "wrong type"); 3220 oop method = mname->obj_field(_method_offset); 3221 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3222 } 3223 3224 bool java_lang_invoke_MemberName::is_method(oop mname) { 3225 assert(is_instance(mname), "must be MemberName"); 3226 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3227 } 3228 3229 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3230 assert(is_instance(mname), "wrong type"); 3231 mname->obj_field_put(_method_offset, resolved_method); 3232 } 3233 3234 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3235 assert(is_instance(mname), "wrong type"); 3236 return (intptr_t) mname->address_field(_vmindex_offset); 3237 } 3238 3239 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3240 assert(is_instance(mname), "wrong type"); 3241 mname->address_field_put(_vmindex_offset, (address) index); 3242 } 3243 3244 3245 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3246 assert(is_instance(resolved_method), "wrong type"); 3247 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3248 assert(m->is_method(), "must be"); 3249 return m; 3250 } 3251 3252 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3253 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3254 assert(is_instance(resolved_method), "wrong type"); 3255 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3256 } 3257 3258 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3259 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3260 oop resolved_method = ResolvedMethodTable::find_method(m()); 3261 if (resolved_method == NULL) { 3262 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3263 if (!k->is_initialized()) { 3264 k->initialize(CHECK_NULL); 3265 } 3266 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3267 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3268 // Add a reference to the loader (actually mirror because anonymous classes will not have 3269 // distinct loaders) to ensure the metadata is kept alive. 3270 // This mirror may be different than the one in clazz field. 3271 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3272 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3273 } 3274 return resolved_method; 3275 } 3276 3277 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3278 assert(is_instance(lform), "wrong type"); 3279 return lform->obj_field(_vmentry_offset); 3280 } 3281 3282 3283 // Support for java_lang_invoke_MethodType 3284 3285 int java_lang_invoke_MethodType::_rtype_offset; 3286 int java_lang_invoke_MethodType::_ptypes_offset; 3287 3288 void java_lang_invoke_MethodType::compute_offsets() { 3289 Klass* k = SystemDictionary::MethodType_klass(); 3290 if (k != NULL) { 3291 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3292 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3293 } 3294 } 3295 3296 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3297 st->print("("); 3298 objArrayOop pts = ptypes(mt); 3299 for (int i = 0, limit = pts->length(); i < limit; i++) { 3300 java_lang_Class::print_signature(pts->obj_at(i), st); 3301 } 3302 st->print(")"); 3303 java_lang_Class::print_signature(rtype(mt), st); 3304 } 3305 3306 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3307 ResourceMark rm; 3308 stringStream buffer(128); 3309 print_signature(mt, &buffer); 3310 const char* sigstr = buffer.base(); 3311 int siglen = (int) buffer.size(); 3312 Symbol *name; 3313 if (!intern_if_not_found) { 3314 name = SymbolTable::probe(sigstr, siglen); 3315 } else { 3316 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3317 } 3318 return name; 3319 } 3320 3321 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3322 if (mt1 == mt2) 3323 return true; 3324 if (rtype(mt1) != rtype(mt2)) 3325 return false; 3326 if (ptype_count(mt1) != ptype_count(mt2)) 3327 return false; 3328 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3329 if (ptype(mt1, i) != ptype(mt2, i)) 3330 return false; 3331 } 3332 return true; 3333 } 3334 3335 oop java_lang_invoke_MethodType::rtype(oop mt) { 3336 assert(is_instance(mt), "must be a MethodType"); 3337 return mt->obj_field(_rtype_offset); 3338 } 3339 3340 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3341 assert(is_instance(mt), "must be a MethodType"); 3342 return (objArrayOop) mt->obj_field(_ptypes_offset); 3343 } 3344 3345 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3346 return ptypes(mt)->obj_at(idx); 3347 } 3348 3349 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3350 return ptypes(mt)->length(); 3351 } 3352 3353 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3354 objArrayOop pts = ptypes(mt); 3355 int count = pts->length(); 3356 int slots = 0; 3357 for (int i = 0; i < count; i++) { 3358 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3359 slots += type2size[bt]; 3360 } 3361 return slots; 3362 } 3363 3364 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3365 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3366 return type2size[bt]; 3367 } 3368 3369 3370 // Support for java_lang_invoke_CallSite 3371 3372 int java_lang_invoke_CallSite::_target_offset; 3373 int java_lang_invoke_CallSite::_context_offset; 3374 3375 void java_lang_invoke_CallSite::compute_offsets() { 3376 Klass* k = SystemDictionary::CallSite_klass(); 3377 if (k != NULL) { 3378 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3379 compute_offset(_context_offset, k, vmSymbols::context_name(), 3380 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3381 } 3382 } 3383 3384 oop java_lang_invoke_CallSite::context(oop call_site) { 3385 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3386 3387 oop dep_oop = call_site->obj_field(_context_offset); 3388 return dep_oop; 3389 } 3390 3391 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3392 3393 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3394 3395 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3396 Klass* k = SystemDictionary::Context_klass(); 3397 if (k != NULL) { 3398 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3399 } 3400 } 3401 3402 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3403 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3404 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3405 DependencyContext dep_ctx(vmdeps_addr); 3406 return dep_ctx; 3407 } 3408 3409 // Support for java_security_AccessControlContext 3410 3411 int java_security_AccessControlContext::_context_offset = 0; 3412 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3413 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3414 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3415 3416 void java_security_AccessControlContext::compute_offsets() { 3417 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3418 fieldDescriptor fd; 3419 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3420 3421 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3422 fatal("Invalid layout of java.security.AccessControlContext"); 3423 } 3424 _context_offset = fd.offset(); 3425 3426 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3427 fatal("Invalid layout of java.security.AccessControlContext"); 3428 } 3429 _privilegedContext_offset = fd.offset(); 3430 3431 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3432 fatal("Invalid layout of java.security.AccessControlContext"); 3433 } 3434 _isPrivileged_offset = fd.offset(); 3435 3436 // The offset may not be present for bootstrapping with older JDK. 3437 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3438 _isAuthorized_offset = fd.offset(); 3439 } 3440 } 3441 3442 3443 bool java_security_AccessControlContext::is_authorized(Handle context) { 3444 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3445 assert(_isAuthorized_offset != -1, "should be set"); 3446 return context->bool_field(_isAuthorized_offset) != 0; 3447 } 3448 3449 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3450 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3451 // Ensure klass is initialized 3452 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3453 // Allocate result 3454 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3455 // Fill in values 3456 result->obj_field_put(_context_offset, context()); 3457 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3458 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3459 // whitelist AccessControlContexts created by the JVM if present 3460 if (_isAuthorized_offset != -1) { 3461 result->bool_field_put(_isAuthorized_offset, true); 3462 } 3463 return result; 3464 } 3465 3466 3467 // Support for java_lang_ClassLoader 3468 3469 bool java_lang_ClassLoader::offsets_computed = false; 3470 int java_lang_ClassLoader::_loader_data_offset = -1; 3471 int java_lang_ClassLoader::parallelCapable_offset = -1; 3472 int java_lang_ClassLoader::name_offset = -1; 3473 int java_lang_ClassLoader::unnamedModule_offset = -1; 3474 3475 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3476 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3477 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3478 } 3479 3480 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3481 return *java_lang_ClassLoader::loader_data_addr(loader); 3482 } 3483 3484 void java_lang_ClassLoader::compute_offsets() { 3485 assert(!offsets_computed, "offsets should be initialized only once"); 3486 offsets_computed = true; 3487 3488 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3489 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3490 compute_optional_offset(parallelCapable_offset, 3491 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3492 3493 compute_offset(name_offset, 3494 k1, vmSymbols::name_name(), vmSymbols::string_signature()); 3495 3496 compute_offset(unnamedModule_offset, 3497 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3498 3499 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3500 } 3501 3502 oop java_lang_ClassLoader::parent(oop loader) { 3503 assert(is_instance(loader), "loader must be oop"); 3504 return loader->obj_field(parent_offset); 3505 } 3506 3507 oop java_lang_ClassLoader::name(oop loader) { 3508 assert(is_instance(loader), "loader must be oop"); 3509 return loader->obj_field(name_offset); 3510 } 3511 3512 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3513 assert(is_instance(loader), "loader must be oop"); 3514 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3515 oop acl = loader; 3516 debug_only(jint loop_count = 0); 3517 // This loop taken verbatim from ClassLoader.java: 3518 do { 3519 acl = parent(acl); 3520 if (cl == acl) { 3521 return true; 3522 } 3523 assert(++loop_count > 0, "loop_count overflow"); 3524 } while (acl != NULL); 3525 return false; 3526 } 3527 3528 bool java_lang_ClassLoader::is_instance(oop obj) { 3529 return obj != NULL && is_subclass(obj->klass()); 3530 } 3531 3532 3533 // For class loader classes, parallelCapable defined 3534 // based on non-null field 3535 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3536 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3537 if (parallelCapable_offset == -1) { 3538 // Default for backward compatibility is false 3539 return false; 3540 } 3541 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3542 } 3543 3544 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3545 // Fix for 4474172; see evaluation for more details 3546 loader = non_reflection_class_loader(loader); 3547 3548 oop cl = SystemDictionary::java_system_loader(); 3549 while(cl != NULL) { 3550 if (cl == loader) return true; 3551 cl = parent(cl); 3552 } 3553 return false; 3554 } 3555 3556 // Return true if this is one of the class loaders associated with 3557 // the generated bytecodes for reflection. 3558 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3559 if (loader != NULL) { 3560 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3561 // This might be null in non-1.4 JDKs 3562 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3563 } 3564 return false; 3565 } 3566 3567 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3568 // See whether this is one of the class loaders associated with 3569 // the generated bytecodes for reflection, and if so, "magically" 3570 // delegate to its parent to prevent class loading from occurring 3571 // in places where applications using reflection didn't expect it. 3572 if (is_reflection_class_loader(loader)) { 3573 return parent(loader); 3574 } 3575 return loader; 3576 } 3577 3578 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3579 assert(is_instance(loader), "loader must be oop"); 3580 return loader->obj_field(unnamedModule_offset); 3581 } 3582 3583 // Support for java_lang_System 3584 int java_lang_System::in_offset_in_bytes() { 3585 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3586 } 3587 3588 3589 int java_lang_System::out_offset_in_bytes() { 3590 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3591 } 3592 3593 3594 int java_lang_System::err_offset_in_bytes() { 3595 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3596 } 3597 3598 3599 bool java_lang_System::has_security_manager() { 3600 InstanceKlass* ik = SystemDictionary::System_klass(); 3601 address addr = ik->static_field_addr(static_security_offset); 3602 if (UseCompressedOops) { 3603 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3604 } else { 3605 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3606 } 3607 } 3608 3609 int java_lang_Class::_klass_offset; 3610 int java_lang_Class::_array_klass_offset; 3611 int java_lang_Class::_oop_size_offset; 3612 int java_lang_Class::_static_oop_field_count_offset; 3613 int java_lang_Class::_class_loader_offset; 3614 int java_lang_Class::_module_offset; 3615 int java_lang_Class::_protection_domain_offset; 3616 int java_lang_Class::_component_mirror_offset; 3617 int java_lang_Class::_init_lock_offset; 3618 int java_lang_Class::_signers_offset; 3619 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3620 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3621 int java_lang_Throwable::backtrace_offset; 3622 int java_lang_Throwable::detailMessage_offset; 3623 int java_lang_Throwable::stackTrace_offset; 3624 int java_lang_Throwable::depth_offset; 3625 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3626 int java_lang_reflect_AccessibleObject::override_offset; 3627 int java_lang_reflect_Method::clazz_offset; 3628 int java_lang_reflect_Method::name_offset; 3629 int java_lang_reflect_Method::returnType_offset; 3630 int java_lang_reflect_Method::parameterTypes_offset; 3631 int java_lang_reflect_Method::exceptionTypes_offset; 3632 int java_lang_reflect_Method::slot_offset; 3633 int java_lang_reflect_Method::modifiers_offset; 3634 int java_lang_reflect_Method::signature_offset; 3635 int java_lang_reflect_Method::annotations_offset; 3636 int java_lang_reflect_Method::parameter_annotations_offset; 3637 int java_lang_reflect_Method::annotation_default_offset; 3638 int java_lang_reflect_Method::type_annotations_offset; 3639 int java_lang_reflect_Constructor::clazz_offset; 3640 int java_lang_reflect_Constructor::parameterTypes_offset; 3641 int java_lang_reflect_Constructor::exceptionTypes_offset; 3642 int java_lang_reflect_Constructor::slot_offset; 3643 int java_lang_reflect_Constructor::modifiers_offset; 3644 int java_lang_reflect_Constructor::signature_offset; 3645 int java_lang_reflect_Constructor::annotations_offset; 3646 int java_lang_reflect_Constructor::parameter_annotations_offset; 3647 int java_lang_reflect_Constructor::type_annotations_offset; 3648 int java_lang_reflect_Field::clazz_offset; 3649 int java_lang_reflect_Field::name_offset; 3650 int java_lang_reflect_Field::type_offset; 3651 int java_lang_reflect_Field::slot_offset; 3652 int java_lang_reflect_Field::modifiers_offset; 3653 int java_lang_reflect_Field::signature_offset; 3654 int java_lang_reflect_Field::annotations_offset; 3655 int java_lang_reflect_Field::type_annotations_offset; 3656 int java_lang_reflect_Parameter::name_offset; 3657 int java_lang_reflect_Parameter::modifiers_offset; 3658 int java_lang_reflect_Parameter::index_offset; 3659 int java_lang_reflect_Parameter::executable_offset; 3660 int java_lang_boxing_object::value_offset; 3661 int java_lang_boxing_object::long_value_offset; 3662 int java_lang_ref_Reference::referent_offset; 3663 int java_lang_ref_Reference::queue_offset; 3664 int java_lang_ref_Reference::next_offset; 3665 int java_lang_ref_Reference::discovered_offset; 3666 int java_lang_ref_Reference::number_of_fake_oop_fields; 3667 int java_lang_ref_SoftReference::timestamp_offset; 3668 int java_lang_ref_SoftReference::static_clock_offset; 3669 int java_lang_ClassLoader::parent_offset; 3670 int java_lang_System::static_in_offset; 3671 int java_lang_System::static_out_offset; 3672 int java_lang_System::static_err_offset; 3673 int java_lang_System::static_security_offset; 3674 int java_lang_StackTraceElement::methodName_offset; 3675 int java_lang_StackTraceElement::fileName_offset; 3676 int java_lang_StackTraceElement::lineNumber_offset; 3677 int java_lang_StackTraceElement::moduleName_offset; 3678 int java_lang_StackTraceElement::moduleVersion_offset; 3679 int java_lang_StackTraceElement::classLoaderName_offset; 3680 int java_lang_StackTraceElement::declaringClass_offset; 3681 int java_lang_StackTraceElement::declaringClassObject_offset; 3682 int java_lang_StackFrameInfo::_declaringClass_offset; 3683 int java_lang_StackFrameInfo::_memberName_offset; 3684 int java_lang_StackFrameInfo::_bci_offset; 3685 int java_lang_StackFrameInfo::_version_offset; 3686 int java_lang_LiveStackFrameInfo::_monitors_offset; 3687 int java_lang_LiveStackFrameInfo::_locals_offset; 3688 int java_lang_LiveStackFrameInfo::_operands_offset; 3689 int java_lang_LiveStackFrameInfo::_mode_offset; 3690 int java_lang_AssertionStatusDirectives::classes_offset; 3691 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3692 int java_lang_AssertionStatusDirectives::packages_offset; 3693 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3694 int java_lang_AssertionStatusDirectives::deflt_offset; 3695 int java_nio_Buffer::_limit_offset; 3696 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3697 int reflect_ConstantPool::_oop_offset; 3698 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3699 3700 3701 // Support for java_lang_StackTraceElement 3702 3703 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3704 element->obj_field_put(fileName_offset, value); 3705 } 3706 3707 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3708 element->obj_field_put(declaringClass_offset, value); 3709 } 3710 3711 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3712 element->obj_field_put(methodName_offset, value); 3713 } 3714 3715 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3716 element->int_field_put(lineNumber_offset, value); 3717 } 3718 3719 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3720 element->obj_field_put(moduleName_offset, value); 3721 } 3722 3723 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3724 element->obj_field_put(moduleVersion_offset, value); 3725 } 3726 3727 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 3728 element->obj_field_put(classLoaderName_offset, value); 3729 } 3730 3731 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 3732 element->obj_field_put(declaringClassObject_offset, value); 3733 } 3734 3735 // Support for java_lang_StackFrameInfo 3736 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3737 element->obj_field_put(_declaringClass_offset, value); 3738 } 3739 3740 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3741 element->short_field_put(_version_offset, value); 3742 } 3743 3744 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3745 element->int_field_put(_bci_offset, value); 3746 } 3747 3748 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3749 element->obj_field_put(_monitors_offset, value); 3750 } 3751 3752 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3753 element->obj_field_put(_locals_offset, value); 3754 } 3755 3756 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3757 element->obj_field_put(_operands_offset, value); 3758 } 3759 3760 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3761 element->int_field_put(_mode_offset, value); 3762 } 3763 3764 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3765 3766 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3767 o->obj_field_put(classes_offset, val); 3768 } 3769 3770 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3771 o->obj_field_put(classEnabled_offset, val); 3772 } 3773 3774 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3775 o->obj_field_put(packages_offset, val); 3776 } 3777 3778 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3779 o->obj_field_put(packageEnabled_offset, val); 3780 } 3781 3782 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3783 o->bool_field_put(deflt_offset, val); 3784 } 3785 3786 3787 // Support for intrinsification of java.nio.Buffer.checkIndex 3788 int java_nio_Buffer::limit_offset() { 3789 return _limit_offset; 3790 } 3791 3792 3793 void java_nio_Buffer::compute_offsets() { 3794 Klass* k = SystemDictionary::nio_Buffer_klass(); 3795 assert(k != NULL, "must be loaded in 1.4+"); 3796 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3797 } 3798 3799 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3800 if (_owner_offset != 0) return; 3801 3802 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3803 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3804 compute_offset(_owner_offset, k, 3805 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3806 } 3807 3808 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3809 assert(_owner_offset != 0, "Must be initialized"); 3810 return obj->obj_field(_owner_offset); 3811 } 3812 3813 // Compute hard-coded offsets 3814 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3815 // are not available to determine the offset_of_static_fields. 3816 void JavaClasses::compute_hard_coded_offsets() { 3817 const int x = heapOopSize; 3818 const int header = instanceOopDesc::base_offset_in_bytes(); 3819 3820 // Throwable Class 3821 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3822 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3823 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3824 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3825 3826 // java_lang_boxing_object 3827 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3828 java_lang_boxing_object::long_value_offset = align_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3829 3830 // java_lang_ref_Reference: 3831 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3832 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3833 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3834 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3835 // Artificial fields for java_lang_ref_Reference 3836 // The first field is for the discovered field added in 1.4 3837 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3838 3839 // java_lang_ref_SoftReference Class 3840 java_lang_ref_SoftReference::timestamp_offset = align_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3841 // Don't multiply static fields because they are always in wordSize units 3842 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3843 3844 // java_lang_ClassLoader 3845 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3846 3847 // java_lang_System 3848 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3849 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3850 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3851 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3852 3853 // java_lang_StackTraceElement 3854 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header; 3855 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header; 3856 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3857 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3858 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3859 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3860 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3861 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3862 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3863 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3864 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3865 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3866 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3867 3868 } 3869 3870 3871 // Compute non-hard-coded field offsets of all the classes in this file 3872 void JavaClasses::compute_offsets() { 3873 // java_lang_Class::compute_offsets was called earlier in bootstrap 3874 java_lang_ClassLoader::compute_offsets(); 3875 java_lang_Throwable::compute_offsets(); 3876 java_lang_Thread::compute_offsets(); 3877 java_lang_ThreadGroup::compute_offsets(); 3878 java_lang_invoke_MethodHandle::compute_offsets(); 3879 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3880 java_lang_invoke_MemberName::compute_offsets(); 3881 java_lang_invoke_ResolvedMethodName::compute_offsets(); 3882 java_lang_invoke_LambdaForm::compute_offsets(); 3883 java_lang_invoke_MethodType::compute_offsets(); 3884 java_lang_invoke_CallSite::compute_offsets(); 3885 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3886 java_security_AccessControlContext::compute_offsets(); 3887 // Initialize reflection classes. The layouts of these classes 3888 // changed with the new reflection implementation in JDK 1.4, and 3889 // since the Universe doesn't know what JDK version it is until this 3890 // point we defer computation of these offsets until now. 3891 java_lang_reflect_AccessibleObject::compute_offsets(); 3892 java_lang_reflect_Method::compute_offsets(); 3893 java_lang_reflect_Constructor::compute_offsets(); 3894 java_lang_reflect_Field::compute_offsets(); 3895 java_nio_Buffer::compute_offsets(); 3896 reflect_ConstantPool::compute_offsets(); 3897 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3898 java_lang_reflect_Parameter::compute_offsets(); 3899 java_lang_Module::compute_offsets(); 3900 java_lang_StackFrameInfo::compute_offsets(); 3901 java_lang_LiveStackFrameInfo::compute_offsets(); 3902 3903 // generated interpreter code wants to know about the offsets we just computed: 3904 AbstractAssembler::update_delayed_values(); 3905 } 3906 3907 #ifndef PRODUCT 3908 3909 // These functions exist to assert the validity of hard-coded field offsets to guard 3910 // against changes in the class files 3911 3912 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3913 EXCEPTION_MARK; 3914 fieldDescriptor fd; 3915 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3916 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3917 InstanceKlass* ik = InstanceKlass::cast(k); 3918 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3919 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3920 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3921 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3922 return false; 3923 } 3924 if (fd.is_static()) { 3925 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3926 return false; 3927 } 3928 if (fd.offset() == hardcoded_offset ) { 3929 return true; 3930 } else { 3931 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3932 klass_name, field_name, hardcoded_offset, fd.offset()); 3933 return false; 3934 } 3935 } 3936 3937 3938 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3939 EXCEPTION_MARK; 3940 fieldDescriptor fd; 3941 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3942 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3943 InstanceKlass* ik = InstanceKlass::cast(k); 3944 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3945 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3946 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3947 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3948 return false; 3949 } 3950 if (!fd.is_static()) { 3951 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3952 return false; 3953 } 3954 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3955 return true; 3956 } else { 3957 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()); 3958 return false; 3959 } 3960 } 3961 3962 3963 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3964 EXCEPTION_MARK; 3965 fieldDescriptor fd; 3966 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3967 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3968 InstanceKlass* ik = InstanceKlass::cast(k); 3969 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3970 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3971 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3972 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3973 return false; 3974 } 3975 if (!fd.is_static() || !fd.has_initial_value()) { 3976 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3977 return false; 3978 } 3979 if (!fd.initial_value_tag().is_int()) { 3980 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3981 return false; 3982 } 3983 jint field_value = fd.int_initial_value(); 3984 if (field_value == hardcoded_constant) { 3985 return true; 3986 } else { 3987 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); 3988 return false; 3989 } 3990 } 3991 3992 3993 // Check the hard-coded field offsets of all the classes in this file 3994 3995 void JavaClasses::check_offsets() { 3996 bool valid = true; 3997 3998 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3999 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4000 4001 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4002 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4003 4004 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4005 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 4006 4007 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 4008 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 4009 4010 // java.lang.String 4011 4012 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 4013 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 4014 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 4015 4016 // java.lang.Class 4017 4018 // Fake fields 4019 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 4020 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 4021 4022 // java.lang.Throwable 4023 4024 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 4025 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 4026 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 4027 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 4028 4029 // Boxed primitive objects (java_lang_boxing_object) 4030 4031 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4032 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4033 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4034 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4035 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4036 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4037 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4038 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4039 4040 // java.lang.ClassLoader 4041 4042 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 4043 4044 // java.lang.System 4045 4046 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4047 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4048 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4049 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4050 4051 // java.lang.StackTraceElement 4052 4053 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;"); 4054 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;"); 4055 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;"); 4056 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;"); 4057 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4058 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4059 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4060 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4061 4062 // java.lang.ref.Reference 4063 4064 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4065 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4066 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4067 // Fake field 4068 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4069 4070 // java.lang.ref.SoftReference 4071 4072 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4073 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4074 4075 // java.lang.AssertionStatusDirectives 4076 // 4077 // The CheckAssertionStatusDirectives boolean can be removed from here and 4078 // globals.hpp after the AssertionStatusDirectives class has been integrated 4079 // into merlin "for some time." Without it, the vm will fail with early 4080 // merlin builds. 4081 4082 if (CheckAssertionStatusDirectives) { 4083 const char* nm = "java/lang/AssertionStatusDirectives"; 4084 const char* sig = "[Ljava/lang/String;"; 4085 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4086 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4087 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4088 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4089 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4090 } 4091 4092 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4093 } 4094 4095 #endif // PRODUCT 4096 4097 int InjectedField::compute_offset() { 4098 InstanceKlass* ik = InstanceKlass::cast(klass()); 4099 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4100 if (!may_be_java && !fs.access_flags().is_internal()) { 4101 // Only look at injected fields 4102 continue; 4103 } 4104 if (fs.name() == name() && fs.signature() == signature()) { 4105 return fs.offset(); 4106 } 4107 } 4108 ResourceMark rm; 4109 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)" : ""); 4110 #ifndef PRODUCT 4111 ik->print(); 4112 tty->print_cr("all fields:"); 4113 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4114 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4115 } 4116 #endif //PRODUCT 4117 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4118 return -1; 4119 } 4120 4121 void javaClasses_init() { 4122 JavaClasses::compute_offsets(); 4123 JavaClasses::check_offsets(); 4124 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4125 }