1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.inline.hpp" 39 #include "oops/fieldStreams.hpp" 40 #include "oops/instanceKlass.hpp" 41 #include "oops/instanceMirrorKlass.hpp" 42 #include "oops/klass.hpp" 43 #include "oops/method.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/symbol.hpp" 47 #include "oops/typeArrayOop.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/safepoint.hpp" 54 #include "runtime/thread.inline.hpp" 55 #include "runtime/vframe.hpp" 56 #include "utilities/preserveException.hpp" 57 58 #if INCLUDE_JVMCI 59 #include "jvmci/jvmciJavaClasses.hpp" 60 #endif 61 62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 64 65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 67 68 InjectedField JavaClasses::_injected_fields[] = { 69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 70 }; 71 72 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 73 return _injected_fields[id].compute_offset(); 74 } 75 76 77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 78 *field_count = 0; 79 80 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 81 if (sid == vmSymbols::NO_SID) { 82 // Only well known classes can inject fields 83 return NULL; 84 } 85 86 int count = 0; 87 int start = -1; 88 89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 91 count++; \ 92 if (start == -1) start = klass##_##name##_enum; \ 93 } 94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 95 #undef LOOKUP_INJECTED_FIELD 96 97 if (start != -1) { 98 *field_count = count; 99 return _injected_fields + start; 100 } 101 return NULL; 102 } 103 104 105 static bool find_field(InstanceKlass* ik, 106 Symbol* name_symbol, Symbol* signature_symbol, 107 fieldDescriptor* fd, 108 bool is_static = false, bool allow_super = false) { 109 if (allow_super || is_static) { 110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 111 } else { 112 return ik->find_local_field(name_symbol, signature_symbol, fd); 113 } 114 } 115 116 // Helpful routine for computing field offsets at run time rather than hardcoding them 117 static void 118 compute_offset(int &dest_offset, 119 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 120 bool is_static = false, bool allow_super = false) { 121 fieldDescriptor fd; 122 InstanceKlass* ik = InstanceKlass::cast(klass); 123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 124 ResourceMark rm; 125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 126 #ifndef PRODUCT 127 ik->print(); 128 tty->print_cr("all fields:"); 129 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 131 } 132 #endif //PRODUCT 133 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 134 } 135 dest_offset = fd.offset(); 136 } 137 138 // Same as above but for "optional" offsets that might not be present in certain JDK versions 139 static void 140 compute_optional_offset(int& dest_offset, 141 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 142 bool allow_super = false) { 143 fieldDescriptor fd; 144 InstanceKlass* ik = InstanceKlass::cast(klass); 145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 146 dest_offset = fd.offset(); 147 } 148 } 149 150 151 int java_lang_String::value_offset = 0; 152 int java_lang_String::hash_offset = 0; 153 int java_lang_String::coder_offset = 0; 154 155 bool java_lang_String::initialized = false; 156 157 bool java_lang_String::is_instance(oop obj) { 158 return is_instance_inlined(obj); 159 } 160 161 void java_lang_String::compute_offsets() { 162 assert(!initialized, "offsets should be initialized only once"); 163 164 Klass* k = SystemDictionary::String_klass(); 165 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 166 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 167 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 168 169 initialized = true; 170 } 171 172 class CompactStringsFixup : public FieldClosure { 173 private: 174 bool _value; 175 176 public: 177 CompactStringsFixup(bool value) : _value(value) {} 178 179 void do_field(fieldDescriptor* fd) { 180 if (fd->name() == vmSymbols::compact_strings_name()) { 181 oop mirror = fd->field_holder()->java_mirror(); 182 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 183 assert(mirror != NULL, "String must have mirror already"); 184 mirror->bool_field_put(fd->offset(), _value); 185 } 186 } 187 }; 188 189 void java_lang_String::set_compact_strings(bool value) { 190 CompactStringsFixup fix(value); 191 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 192 } 193 194 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 195 assert(initialized, "Must be initialized"); 196 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 197 198 // Create the String object first, so there's a chance that the String 199 // and the char array it points to end up in the same cache line. 200 oop obj; 201 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 202 203 // Create the char array. The String object must be handlized here 204 // because GC can happen as a result of the allocation attempt. 205 Handle h_obj(THREAD, obj); 206 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 207 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 208 209 // Point the String at the char array 210 obj = h_obj(); 211 set_value(obj, buffer); 212 // No need to zero the offset, allocation zero'ed the entire String object 213 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 214 return h_obj; 215 } 216 217 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 218 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 219 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 220 typeArrayOop buffer = value(h_obj()); 221 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 222 if (is_latin1) { 223 for (int index = 0; index < length; index++) { 224 buffer->byte_at_put(index, (jbyte)unicode[index]); 225 } 226 } else { 227 for (int index = 0; index < length; index++) { 228 buffer->char_at_put(index, unicode[index]); 229 } 230 } 231 232 #ifdef ASSERT 233 { 234 ResourceMark rm; 235 char* expected = UNICODE::as_utf8(unicode, length); 236 char* actual = as_utf8_string(h_obj()); 237 if (strcmp(expected, actual) != 0) { 238 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 239 ShouldNotReachHere(); 240 } 241 } 242 #endif 243 244 return h_obj; 245 } 246 247 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 248 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 249 return h_obj(); 250 } 251 252 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 253 if (utf8_str == NULL) { 254 return Handle(); 255 } 256 bool has_multibyte, is_latin1; 257 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 258 if (!CompactStrings) { 259 has_multibyte = true; 260 is_latin1 = false; 261 } 262 263 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 264 if (length > 0) { 265 if (!has_multibyte) { 266 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 267 } else if (is_latin1) { 268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 269 } else { 270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 271 } 272 } 273 274 #ifdef ASSERT 275 // This check is too strict because the input string is not necessarily valid UTF8. 276 // For example, it may be created with arbitrary content via jni_NewStringUTF. 277 /* 278 { 279 ResourceMark rm; 280 const char* expected = utf8_str; 281 char* actual = as_utf8_string(h_obj()); 282 if (strcmp(expected, actual) != 0) { 283 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 284 ShouldNotReachHere(); 285 } 286 } 287 */ 288 #endif 289 290 return h_obj; 291 } 292 293 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 294 Handle h_obj = create_from_str(utf8_str, CHECK_0); 295 return h_obj(); 296 } 297 298 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 299 const char* utf8_str = (char*)symbol->bytes(); 300 int utf8_len = symbol->utf8_length(); 301 302 bool has_multibyte, is_latin1; 303 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 304 if (!CompactStrings) { 305 has_multibyte = true; 306 is_latin1 = false; 307 } 308 309 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 310 if (length > 0) { 311 if (!has_multibyte) { 312 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 313 } else if (is_latin1) { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 315 } else { 316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 317 } 318 } 319 320 #ifdef ASSERT 321 { 322 ResourceMark rm; 323 const char* expected = symbol->as_utf8(); 324 char* actual = as_utf8_string(h_obj()); 325 if (strncmp(expected, actual, utf8_len) != 0) { 326 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 327 ShouldNotReachHere(); 328 } 329 } 330 #endif 331 332 return h_obj; 333 } 334 335 // Converts a C string to a Java String based on current encoding 336 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 337 assert(str != NULL, "bad arguments"); 338 339 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 340 static to_java_string_fn_t _to_java_string_fn = NULL; 341 342 if (_to_java_string_fn == NULL) { 343 void *lib_handle = os::native_java_library(); 344 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 345 if (_to_java_string_fn == NULL) { 346 fatal("NewStringPlatform missing"); 347 } 348 } 349 350 jstring js = NULL; 351 { JavaThread* thread = (JavaThread*)THREAD; 352 assert(thread->is_Java_thread(), "must be java thread"); 353 HandleMark hm(thread); 354 ThreadToNativeFromVM ttn(thread); 355 js = (_to_java_string_fn)(thread->jni_environment(), str); 356 } 357 return Handle(THREAD, JNIHandles::resolve(js)); 358 } 359 360 // Converts a Java String to a native C string that can be used for 361 // native OS calls. 362 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 363 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 364 static to_platform_string_fn_t _to_platform_string_fn = NULL; 365 366 if (_to_platform_string_fn == NULL) { 367 void *lib_handle = os::native_java_library(); 368 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 369 if (_to_platform_string_fn == NULL) { 370 fatal("GetStringPlatformChars missing"); 371 } 372 } 373 374 char *native_platform_string; 375 { JavaThread* thread = (JavaThread*)THREAD; 376 assert(thread->is_Java_thread(), "must be java thread"); 377 JNIEnv *env = thread->jni_environment(); 378 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 379 bool is_copy; 380 HandleMark hm(thread); 381 ThreadToNativeFromVM ttn(thread); 382 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 383 assert(is_copy == JNI_TRUE, "is_copy value changed"); 384 JNIHandles::destroy_local(js); 385 } 386 return native_platform_string; 387 } 388 389 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 390 oop obj = java_string(); 391 // Typical usage is to convert all '/' to '.' in string. 392 typeArrayOop value = java_lang_String::value(obj); 393 int length = java_lang_String::length(obj); 394 bool is_latin1 = java_lang_String::is_latin1(obj); 395 396 // First check if any from_char exist 397 int index; // Declared outside, used later 398 for (index = 0; index < length; index++) { 399 jchar c = !is_latin1 ? value->char_at(index) : 400 ((jchar) value->byte_at(index)) & 0xff; 401 if (c == from_char) { 402 break; 403 } 404 } 405 if (index == length) { 406 // No from_char, so do not copy. 407 return java_string; 408 } 409 410 // Check if result string will be latin1 411 bool to_is_latin1 = false; 412 413 // Replacement char must be latin1 414 if (CompactStrings && UNICODE::is_latin1(to_char)) { 415 if (is_latin1) { 416 // Source string is latin1 as well 417 to_is_latin1 = true; 418 } else if (!UNICODE::is_latin1(from_char)) { 419 // We are replacing an UTF16 char. Scan string to 420 // check if result can be latin1 encoded. 421 to_is_latin1 = true; 422 for (index = 0; index < length; index++) { 423 jchar c = value->char_at(index); 424 if (c != from_char && !UNICODE::is_latin1(c)) { 425 to_is_latin1 = false; 426 break; 427 } 428 } 429 } 430 } 431 432 // Create new UNICODE (or byte) buffer. Must handlize value because GC 433 // may happen during String and char array creation. 434 typeArrayHandle h_value(THREAD, value); 435 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 436 typeArrayOop from_buffer = h_value(); 437 typeArrayOop to_buffer = java_lang_String::value(string()); 438 439 // Copy contents 440 for (index = 0; index < length; index++) { 441 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 442 ((jchar) from_buffer->byte_at(index)) & 0xff; 443 if (c == from_char) { 444 c = to_char; 445 } 446 if (!to_is_latin1) { 447 to_buffer->char_at_put(index, c); 448 } else { 449 to_buffer->byte_at_put(index, (jbyte) c); 450 } 451 } 452 return string; 453 } 454 455 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 456 typeArrayOop value = java_lang_String::value(java_string); 457 length = java_lang_String::length(java_string); 458 bool is_latin1 = java_lang_String::is_latin1(java_string); 459 460 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 461 if (result != NULL) { 462 if (!is_latin1) { 463 for (int index = 0; index < length; index++) { 464 result[index] = value->char_at(index); 465 } 466 } else { 467 for (int index = 0; index < length; index++) { 468 result[index] = ((jchar) value->byte_at(index)) & 0xff; 469 } 470 } 471 } else { 472 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 473 } 474 return result; 475 } 476 477 unsigned int java_lang_String::hash_code(oop java_string) { 478 int length = java_lang_String::length(java_string); 479 // Zero length string will hash to zero with String.hashCode() function. 480 if (length == 0) return 0; 481 482 typeArrayOop value = java_lang_String::value(java_string); 483 bool is_latin1 = java_lang_String::is_latin1(java_string); 484 485 if (is_latin1) { 486 return java_lang_String::hash_code(value->byte_at_addr(0), length); 487 } else { 488 return java_lang_String::hash_code(value->char_at_addr(0), length); 489 } 490 } 491 492 char* java_lang_String::as_quoted_ascii(oop java_string) { 493 typeArrayOop value = java_lang_String::value(java_string); 494 int length = java_lang_String::length(java_string); 495 bool is_latin1 = java_lang_String::is_latin1(java_string); 496 497 if (length == 0) return NULL; 498 499 char* result; 500 int result_length; 501 if (!is_latin1) { 502 jchar* base = value->char_at_addr(0); 503 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 504 result = NEW_RESOURCE_ARRAY(char, result_length); 505 UNICODE::as_quoted_ascii(base, length, result, result_length); 506 } else { 507 jbyte* base = value->byte_at_addr(0); 508 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 509 result = NEW_RESOURCE_ARRAY(char, result_length); 510 UNICODE::as_quoted_ascii(base, length, result, result_length); 511 } 512 assert(result_length >= length + 1, "must not be shorter"); 513 assert(result_length == (int)strlen(result) + 1, "must match"); 514 return result; 515 } 516 517 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 518 oop obj = java_string(); 519 typeArrayOop value = java_lang_String::value(obj); 520 int length = java_lang_String::length(obj); 521 bool is_latin1 = java_lang_String::is_latin1(obj); 522 if (!is_latin1) { 523 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 524 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 525 return sym; 526 } else { 527 ResourceMark rm; 528 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 529 const char* base = UNICODE::as_utf8(position, length); 530 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 531 return sym; 532 } 533 } 534 535 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 536 typeArrayOop value = java_lang_String::value(java_string); 537 int length = java_lang_String::length(java_string); 538 bool is_latin1 = java_lang_String::is_latin1(java_string); 539 if (!is_latin1) { 540 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 541 return SymbolTable::probe_unicode(base, length); 542 } else { 543 ResourceMark rm; 544 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 545 const char* base = UNICODE::as_utf8(position, length); 546 return SymbolTable::probe(base, length); 547 } 548 } 549 550 int java_lang_String::utf8_length(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 if (length == 0) { 555 return 0; 556 } 557 if (!is_latin1) { 558 return UNICODE::utf8_length(value->char_at_addr(0), length); 559 } else { 560 return UNICODE::utf8_length(value->byte_at_addr(0), length); 561 } 562 } 563 564 char* java_lang_String::as_utf8_string(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 570 return UNICODE::as_utf8(position, length); 571 } else { 572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 573 return UNICODE::as_utf8(position, length); 574 } 575 } 576 577 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 578 typeArrayOop value = java_lang_String::value(java_string); 579 int length = java_lang_String::length(java_string); 580 bool is_latin1 = java_lang_String::is_latin1(java_string); 581 if (!is_latin1) { 582 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 583 return UNICODE::as_utf8(position, length, buf, buflen); 584 } else { 585 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 586 return UNICODE::as_utf8(position, length, buf, buflen); 587 } 588 } 589 590 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 591 typeArrayOop value = java_lang_String::value(java_string); 592 int length = java_lang_String::length(java_string); 593 assert(start + len <= length, "just checking"); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* position = value->char_at_addr(start); 597 return UNICODE::as_utf8(position, len); 598 } else { 599 jbyte* position = value->byte_at_addr(start); 600 return UNICODE::as_utf8(position, len); 601 } 602 } 603 604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 605 typeArrayOop value = java_lang_String::value(java_string); 606 int length = java_lang_String::length(java_string); 607 assert(start + len <= length, "just checking"); 608 bool is_latin1 = java_lang_String::is_latin1(java_string); 609 if (!is_latin1) { 610 jchar* position = value->char_at_addr(start); 611 return UNICODE::as_utf8(position, len, buf, buflen); 612 } else { 613 jbyte* position = value->byte_at_addr(start); 614 return UNICODE::as_utf8(position, len, buf, buflen); 615 } 616 } 617 618 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 619 assert(java_string->klass() == SystemDictionary::String_klass(), 620 "must be java_string"); 621 typeArrayOop value = java_lang_String::value(java_string); 622 int length = java_lang_String::length(java_string); 623 if (length != len) { 624 return false; 625 } 626 bool is_latin1 = java_lang_String::is_latin1(java_string); 627 if (!is_latin1) { 628 for (int i = 0; i < len; i++) { 629 if (value->char_at(i) != chars[i]) { 630 return false; 631 } 632 } 633 } else { 634 for (int i = 0; i < len; i++) { 635 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 636 return false; 637 } 638 } 639 } 640 return true; 641 } 642 643 bool java_lang_String::equals(oop str1, oop str2) { 644 assert(str1->klass() == SystemDictionary::String_klass(), 645 "must be java String"); 646 assert(str2->klass() == SystemDictionary::String_klass(), 647 "must be java String"); 648 typeArrayOop value1 = java_lang_String::value(str1); 649 int length1 = java_lang_String::length(str1); 650 bool is_latin1 = java_lang_String::is_latin1(str1); 651 typeArrayOop value2 = java_lang_String::value(str2); 652 int length2 = java_lang_String::length(str2); 653 bool is_latin2 = java_lang_String::is_latin1(str2); 654 655 if ((length1 != length2) || (is_latin1 != is_latin2)) { 656 // Strings of different size or with different 657 // coders are never equal. 658 return false; 659 } 660 int blength1 = value1->length(); 661 for (int i = 0; i < value1->length(); i++) { 662 if (value1->byte_at(i) != value2->byte_at(i)) { 663 return false; 664 } 665 } 666 return true; 667 } 668 669 void java_lang_String::print(oop java_string, outputStream* st) { 670 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 671 typeArrayOop value = java_lang_String::value(java_string); 672 673 if (value == NULL) { 674 // This can happen if, e.g., printing a String 675 // object before its initializer has been called 676 st->print("NULL"); 677 return; 678 } 679 680 int length = java_lang_String::length(java_string); 681 bool is_latin1 = java_lang_String::is_latin1(java_string); 682 683 st->print("\""); 684 for (int index = 0; index < length; index++) { 685 st->print("%c", (!is_latin1) ? value->char_at(index) : 686 ((jchar) value->byte_at(index)) & 0xff ); 687 } 688 st->print("\""); 689 } 690 691 692 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 693 assert(mirror.not_null() && fd->is_static(), "just checking"); 694 if (fd->has_initial_value()) { 695 BasicType t = fd->field_type(); 696 switch (t) { 697 case T_BYTE: 698 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 699 break; 700 case T_BOOLEAN: 701 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 702 break; 703 case T_CHAR: 704 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 705 break; 706 case T_SHORT: 707 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 708 break; 709 case T_INT: 710 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 711 break; 712 case T_FLOAT: 713 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 714 break; 715 case T_DOUBLE: 716 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 717 break; 718 case T_LONG: 719 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 720 break; 721 case T_OBJECT: 722 { 723 #ifdef ASSERT 724 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 725 assert(fd->signature() == sym, "just checking"); 726 #endif 727 oop string = fd->string_initial_value(CHECK); 728 mirror()->obj_field_put(fd->offset(), string); 729 } 730 break; 731 default: 732 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 733 "Illegal ConstantValue attribute in class file"); 734 } 735 } 736 } 737 738 739 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 740 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 741 742 // If the offset was read from the shared archive, it was fixed up already 743 if (!k->is_shared()) { 744 if (k->is_instance_klass()) { 745 // During bootstrap, java.lang.Class wasn't loaded so static field 746 // offsets were computed without the size added it. Go back and 747 // update all the static field offsets to included the size. 748 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 749 if (fs.access_flags().is_static()) { 750 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 751 fs.set_offset(real_offset); 752 } 753 } 754 } 755 } 756 create_mirror(k, Handle(NULL), Handle(NULL), Handle(NULL), CHECK); 757 } 758 759 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 760 Handle mirror, 761 Handle protection_domain, 762 TRAPS) { 763 // Allocate a simple java object for a lock. 764 // This needs to be a java object because during class initialization 765 // it can be held across a java call. 766 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 767 set_init_lock(mirror(), r); 768 769 // Set protection domain also 770 set_protection_domain(mirror(), protection_domain()); 771 772 // Initialize static fields 773 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 774 } 775 776 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 777 Handle module, Handle protection_domain, TRAPS) { 778 assert(k->java_mirror() == NULL, "should only assign mirror once"); 779 // Use this moment of initialization to cache modifier_flags also, 780 // to support Class.getModifiers(). Instance classes recalculate 781 // the cached flags after the class file is parsed, but before the 782 // class is put into the system dictionary. 783 int computed_modifiers = k->compute_modifier_flags(CHECK); 784 k->set_modifier_flags(computed_modifiers); 785 // Class_klass has to be loaded because it is used to allocate 786 // the mirror. 787 if (SystemDictionary::Class_klass_loaded()) { 788 // Allocate mirror (java.lang.Class instance) 789 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 790 791 // Setup indirection from mirror->klass 792 if (!k.is_null()) { 793 java_lang_Class::set_klass(mirror(), k()); 794 } 795 796 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 797 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 798 799 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 800 801 // It might also have a component mirror. This mirror must already exist. 802 if (k->is_array_klass()) { 803 Handle comp_mirror; 804 if (k->is_typeArray_klass()) { 805 BasicType type = TypeArrayKlass::cast(k())->element_type(); 806 comp_mirror = Universe::java_mirror(type); 807 } else { 808 assert(k->is_objArray_klass(), "Must be"); 809 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 810 assert(element_klass != NULL, "Must have an element klass"); 811 comp_mirror = element_klass->java_mirror(); 812 } 813 assert(comp_mirror.not_null(), "must have a mirror"); 814 815 // Two-way link between the array klass and its component mirror: 816 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 817 set_component_mirror(mirror(), comp_mirror()); 818 set_array_klass(comp_mirror(), k()); 819 } else { 820 assert(k->is_instance_klass(), "Must be"); 821 822 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 823 if (HAS_PENDING_EXCEPTION) { 824 // If any of the fields throws an exception like OOM remove the klass field 825 // from the mirror so GC doesn't follow it after the klass has been deallocated. 826 // This mirror looks like a primitive type, which logically it is because it 827 // it represents no class. 828 java_lang_Class::set_klass(mirror(), NULL); 829 return; 830 } 831 } 832 833 // set the classLoader field in the java_lang_Class instance 834 assert(class_loader() == k->class_loader(), "should be same"); 835 set_class_loader(mirror(), class_loader()); 836 837 // set the module field in the java_lang_Class instance 838 // This may be null during bootstrap but will get fixed up later on. 839 set_module(mirror(), module()); 840 841 // Setup indirection from klass->mirror last 842 // after any exceptions can happen during allocations. 843 if (!k.is_null()) { 844 k->set_java_mirror(mirror()); 845 } 846 847 // Keep list of classes needing java.base module fixup. 848 if (!ModuleEntryTable::javabase_defined()) { 849 if (fixup_module_field_list() == NULL) { 850 GrowableArray<Klass*>* list = 851 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 852 set_fixup_module_field_list(list); 853 } 854 k->class_loader_data()->inc_keep_alive(); 855 fixup_module_field_list()->push(k()); 856 } 857 } else { 858 if (fixup_mirror_list() == NULL) { 859 GrowableArray<Klass*>* list = 860 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 861 set_fixup_mirror_list(list); 862 } 863 fixup_mirror_list()->push(k()); 864 } 865 } 866 867 void java_lang_Class::fixup_module_field(KlassHandle k, Handle module) { 868 assert(_module_offset != 0, "must have been computed already"); 869 java_lang_Class::set_module(k->java_mirror(), module()); 870 } 871 872 int java_lang_Class::oop_size(oop java_class) { 873 assert(_oop_size_offset != 0, "must be set"); 874 int size = java_class->int_field(_oop_size_offset); 875 assert(size > 0, "Oop size must be greater than zero, not %d", size); 876 return size; 877 } 878 879 void java_lang_Class::set_oop_size(oop java_class, int size) { 880 assert(_oop_size_offset != 0, "must be set"); 881 assert(size > 0, "Oop size must be greater than zero, not %d", size); 882 java_class->int_field_put(_oop_size_offset, size); 883 } 884 885 int java_lang_Class::static_oop_field_count(oop java_class) { 886 assert(_static_oop_field_count_offset != 0, "must be set"); 887 return java_class->int_field(_static_oop_field_count_offset); 888 } 889 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 890 assert(_static_oop_field_count_offset != 0, "must be set"); 891 java_class->int_field_put(_static_oop_field_count_offset, size); 892 } 893 894 oop java_lang_Class::protection_domain(oop java_class) { 895 assert(_protection_domain_offset != 0, "must be set"); 896 return java_class->obj_field(_protection_domain_offset); 897 } 898 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 899 assert(_protection_domain_offset != 0, "must be set"); 900 java_class->obj_field_put(_protection_domain_offset, pd); 901 } 902 903 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 904 assert(_component_mirror_offset != 0, "must be set"); 905 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 906 } 907 oop java_lang_Class::component_mirror(oop java_class) { 908 assert(_component_mirror_offset != 0, "must be set"); 909 return java_class->obj_field(_component_mirror_offset); 910 } 911 912 oop java_lang_Class::init_lock(oop java_class) { 913 assert(_init_lock_offset != 0, "must be set"); 914 return java_class->obj_field(_init_lock_offset); 915 } 916 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 917 assert(_init_lock_offset != 0, "must be set"); 918 java_class->obj_field_put(_init_lock_offset, init_lock); 919 } 920 921 objArrayOop java_lang_Class::signers(oop java_class) { 922 assert(_signers_offset != 0, "must be set"); 923 return (objArrayOop)java_class->obj_field(_signers_offset); 924 } 925 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 926 assert(_signers_offset != 0, "must be set"); 927 java_class->obj_field_put(_signers_offset, (oop)signers); 928 } 929 930 931 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 932 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 933 if (_class_loader_offset != 0) { 934 java_class->obj_field_put(_class_loader_offset, loader); 935 } 936 } 937 938 oop java_lang_Class::class_loader(oop java_class) { 939 assert(_class_loader_offset != 0, "must be set"); 940 return java_class->obj_field(_class_loader_offset); 941 } 942 943 oop java_lang_Class::module(oop java_class) { 944 assert(_module_offset != 0, "must be set"); 945 return java_class->obj_field(_module_offset); 946 } 947 948 void java_lang_Class::set_module(oop java_class, oop module) { 949 assert(_module_offset != 0, "must be set"); 950 java_class->obj_field_put(_module_offset, module); 951 } 952 953 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 954 // This should be improved by adding a field at the Java level or by 955 // introducing a new VM klass (see comment in ClassFileParser) 956 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 957 if (type != T_VOID) { 958 Klass* aklass = Universe::typeArrayKlassObj(type); 959 assert(aklass != NULL, "correct bootstrap"); 960 set_array_klass(java_class, aklass); 961 } 962 #ifdef ASSERT 963 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 964 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 965 #endif 966 return java_class; 967 } 968 969 970 Klass* java_lang_Class::as_Klass(oop java_class) { 971 //%note memory_2 972 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 973 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 974 assert(k == NULL || k->is_klass(), "type check"); 975 return k; 976 } 977 978 979 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 980 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 981 java_class->metadata_field_put(_klass_offset, klass); 982 } 983 984 985 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 986 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 987 Symbol* name = NULL; 988 bool is_instance = false; 989 if (is_primitive(java_class)) { 990 name = vmSymbols::type_signature(primitive_type(java_class)); 991 } else { 992 Klass* k = as_Klass(java_class); 993 is_instance = k->is_instance_klass(); 994 name = k->name(); 995 } 996 if (name == NULL) { 997 st->print("<null>"); 998 return; 999 } 1000 if (is_instance) st->print("L"); 1001 st->write((char*) name->base(), (int) name->utf8_length()); 1002 if (is_instance) st->print(";"); 1003 } 1004 1005 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1006 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1007 Symbol* name; 1008 if (is_primitive(java_class)) { 1009 name = vmSymbols::type_signature(primitive_type(java_class)); 1010 // Because this can create a new symbol, the caller has to decrement 1011 // the refcount, so make adjustment here and below for symbols returned 1012 // that are not created or incremented due to a successful lookup. 1013 name->increment_refcount(); 1014 } else { 1015 Klass* k = as_Klass(java_class); 1016 if (!k->is_instance_klass()) { 1017 name = k->name(); 1018 name->increment_refcount(); 1019 } else { 1020 ResourceMark rm; 1021 const char* sigstr = k->signature_name(); 1022 int siglen = (int) strlen(sigstr); 1023 if (!intern_if_not_found) { 1024 name = SymbolTable::probe(sigstr, siglen); 1025 } else { 1026 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1027 } 1028 } 1029 } 1030 return name; 1031 } 1032 1033 // Returns the Java name for this Java mirror (Resource allocated) 1034 // See Klass::external_name(). 1035 // For primitive type Java mirrors, its type name is returned. 1036 const char* java_lang_Class::as_external_name(oop java_class) { 1037 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1038 const char* name = NULL; 1039 if (is_primitive(java_class)) { 1040 name = type2name(primitive_type(java_class)); 1041 } else { 1042 name = as_Klass(java_class)->external_name(); 1043 } 1044 if (name == NULL) { 1045 name = "<null>"; 1046 } 1047 return name; 1048 } 1049 1050 Klass* java_lang_Class::array_klass(oop java_class) { 1051 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1052 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1053 return k; 1054 } 1055 1056 1057 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1058 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1059 java_class->metadata_field_put(_array_klass_offset, klass); 1060 } 1061 1062 1063 bool java_lang_Class::is_primitive(oop java_class) { 1064 // should assert: 1065 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1066 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1067 1068 #ifdef ASSERT 1069 if (is_primitive) { 1070 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1071 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1072 "Should be either the T_VOID primitive or a java primitive"); 1073 } 1074 #endif 1075 1076 return is_primitive; 1077 } 1078 1079 1080 BasicType java_lang_Class::primitive_type(oop java_class) { 1081 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1082 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1083 BasicType type = T_VOID; 1084 if (ak != NULL) { 1085 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1086 type = ArrayKlass::cast(ak)->element_type(); 1087 } else { 1088 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1089 } 1090 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1091 return type; 1092 } 1093 1094 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1095 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1096 if (is_primitive(java_class)) { 1097 if (reference_klass != NULL) 1098 (*reference_klass) = NULL; 1099 return primitive_type(java_class); 1100 } else { 1101 if (reference_klass != NULL) 1102 (*reference_klass) = as_Klass(java_class); 1103 return T_OBJECT; 1104 } 1105 } 1106 1107 1108 oop java_lang_Class::primitive_mirror(BasicType t) { 1109 oop mirror = Universe::java_mirror(t); 1110 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1111 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1112 return mirror; 1113 } 1114 1115 bool java_lang_Class::offsets_computed = false; 1116 int java_lang_Class::classRedefinedCount_offset = -1; 1117 1118 void java_lang_Class::compute_offsets() { 1119 assert(!offsets_computed, "offsets should be initialized only once"); 1120 offsets_computed = true; 1121 1122 Klass* k = SystemDictionary::Class_klass(); 1123 // The classRedefinedCount field is only present starting in 1.5, 1124 // so don't go fatal. 1125 compute_optional_offset(classRedefinedCount_offset, 1126 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1127 1128 // Needs to be optional because the old build runs Queens during bootstrapping 1129 // and jdk8-9 doesn't have coordinated pushes yet. 1130 compute_optional_offset(_class_loader_offset, 1131 k, vmSymbols::classLoader_name(), 1132 vmSymbols::classloader_signature()); 1133 1134 compute_offset(_component_mirror_offset, 1135 k, vmSymbols::componentType_name(), 1136 vmSymbols::class_signature()); 1137 1138 compute_offset(_module_offset, 1139 k, vmSymbols::module_name(), 1140 vmSymbols::module_signature()); 1141 1142 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1143 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1144 // GC treats them the same. 1145 _init_lock_offset = _component_mirror_offset; 1146 1147 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1148 } 1149 1150 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1151 if (classRedefinedCount_offset == -1) { 1152 // If we don't have an offset for it then just return -1 as a marker. 1153 return -1; 1154 } 1155 1156 return the_class_mirror->int_field(classRedefinedCount_offset); 1157 } 1158 1159 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1160 if (classRedefinedCount_offset == -1) { 1161 // If we don't have an offset for it then nothing to set. 1162 return; 1163 } 1164 1165 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1166 } 1167 1168 1169 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1170 // platform thread structure, and a eetop offset which was used for thread 1171 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1172 // merged, so in the HotSpot VM we just use the eetop field for the thread 1173 // instead of the privateInfo_offset. 1174 // 1175 // Note: The stackSize field is only present starting in 1.4. 1176 1177 int java_lang_Thread::_name_offset = 0; 1178 int java_lang_Thread::_group_offset = 0; 1179 int java_lang_Thread::_contextClassLoader_offset = 0; 1180 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1181 int java_lang_Thread::_priority_offset = 0; 1182 int java_lang_Thread::_eetop_offset = 0; 1183 int java_lang_Thread::_daemon_offset = 0; 1184 int java_lang_Thread::_stillborn_offset = 0; 1185 int java_lang_Thread::_stackSize_offset = 0; 1186 int java_lang_Thread::_tid_offset = 0; 1187 int java_lang_Thread::_thread_status_offset = 0; 1188 int java_lang_Thread::_park_blocker_offset = 0; 1189 int java_lang_Thread::_park_event_offset = 0 ; 1190 1191 1192 void java_lang_Thread::compute_offsets() { 1193 assert(_group_offset == 0, "offsets should be initialized only once"); 1194 1195 Klass* k = SystemDictionary::Thread_klass(); 1196 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1197 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1198 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1199 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1200 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1201 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1202 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1203 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1204 // The stackSize field is only present starting in 1.4, so don't go fatal. 1205 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1206 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1207 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1208 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1209 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1210 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1211 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1212 vmSymbols::long_signature()); 1213 } 1214 1215 1216 JavaThread* java_lang_Thread::thread(oop java_thread) { 1217 return (JavaThread*)java_thread->address_field(_eetop_offset); 1218 } 1219 1220 1221 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1222 java_thread->address_field_put(_eetop_offset, (address)thread); 1223 } 1224 1225 1226 oop java_lang_Thread::name(oop java_thread) { 1227 return java_thread->obj_field(_name_offset); 1228 } 1229 1230 1231 void java_lang_Thread::set_name(oop java_thread, oop name) { 1232 java_thread->obj_field_put(_name_offset, name); 1233 } 1234 1235 1236 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1237 return (ThreadPriority)java_thread->int_field(_priority_offset); 1238 } 1239 1240 1241 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1242 java_thread->int_field_put(_priority_offset, priority); 1243 } 1244 1245 1246 oop java_lang_Thread::threadGroup(oop java_thread) { 1247 return java_thread->obj_field(_group_offset); 1248 } 1249 1250 1251 bool java_lang_Thread::is_stillborn(oop java_thread) { 1252 return java_thread->bool_field(_stillborn_offset) != 0; 1253 } 1254 1255 1256 // We never have reason to turn the stillborn bit off 1257 void java_lang_Thread::set_stillborn(oop java_thread) { 1258 java_thread->bool_field_put(_stillborn_offset, true); 1259 } 1260 1261 1262 bool java_lang_Thread::is_alive(oop java_thread) { 1263 JavaThread* thr = java_lang_Thread::thread(java_thread); 1264 return (thr != NULL); 1265 } 1266 1267 1268 bool java_lang_Thread::is_daemon(oop java_thread) { 1269 return java_thread->bool_field(_daemon_offset) != 0; 1270 } 1271 1272 1273 void java_lang_Thread::set_daemon(oop java_thread) { 1274 java_thread->bool_field_put(_daemon_offset, true); 1275 } 1276 1277 oop java_lang_Thread::context_class_loader(oop java_thread) { 1278 return java_thread->obj_field(_contextClassLoader_offset); 1279 } 1280 1281 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1282 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1283 } 1284 1285 1286 jlong java_lang_Thread::stackSize(oop java_thread) { 1287 if (_stackSize_offset > 0) { 1288 return java_thread->long_field(_stackSize_offset); 1289 } else { 1290 return 0; 1291 } 1292 } 1293 1294 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1295 void java_lang_Thread::set_thread_status(oop java_thread, 1296 java_lang_Thread::ThreadStatus status) { 1297 // The threadStatus is only present starting in 1.5 1298 if (_thread_status_offset > 0) { 1299 java_thread->int_field_put(_thread_status_offset, status); 1300 } 1301 } 1302 1303 // Read thread status value from threadStatus field in java.lang.Thread java class. 1304 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1305 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1306 JavaThread::current()->thread_state() == _thread_in_vm, 1307 "Java Thread is not running in vm"); 1308 // The threadStatus is only present starting in 1.5 1309 if (_thread_status_offset > 0) { 1310 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1311 } else { 1312 // All we can easily figure out is if it is alive, but that is 1313 // enough info for a valid unknown status. 1314 // These aren't restricted to valid set ThreadStatus values, so 1315 // use JVMTI values and cast. 1316 JavaThread* thr = java_lang_Thread::thread(java_thread); 1317 if (thr == NULL) { 1318 // the thread hasn't run yet or is in the process of exiting 1319 return NEW; 1320 } 1321 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1322 } 1323 } 1324 1325 1326 jlong java_lang_Thread::thread_id(oop java_thread) { 1327 // The thread ID field is only present starting in 1.5 1328 if (_tid_offset > 0) { 1329 return java_thread->long_field(_tid_offset); 1330 } else { 1331 return 0; 1332 } 1333 } 1334 1335 oop java_lang_Thread::park_blocker(oop java_thread) { 1336 assert(JDK_Version::current().supports_thread_park_blocker() && 1337 _park_blocker_offset != 0, "Must support parkBlocker field"); 1338 1339 if (_park_blocker_offset > 0) { 1340 return java_thread->obj_field(_park_blocker_offset); 1341 } 1342 1343 return NULL; 1344 } 1345 1346 jlong java_lang_Thread::park_event(oop java_thread) { 1347 if (_park_event_offset > 0) { 1348 return java_thread->long_field(_park_event_offset); 1349 } 1350 return 0; 1351 } 1352 1353 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1354 if (_park_event_offset > 0) { 1355 java_thread->long_field_put(_park_event_offset, ptr); 1356 return true; 1357 } 1358 return false; 1359 } 1360 1361 1362 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1363 assert(_thread_status_offset != 0, "Must have thread status"); 1364 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1365 switch (status) { 1366 case NEW : return "NEW"; 1367 case RUNNABLE : return "RUNNABLE"; 1368 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1369 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1370 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1371 case PARKED : return "WAITING (parking)"; 1372 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1373 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1374 case TERMINATED : return "TERMINATED"; 1375 default : return "UNKNOWN"; 1376 }; 1377 } 1378 int java_lang_ThreadGroup::_parent_offset = 0; 1379 int java_lang_ThreadGroup::_name_offset = 0; 1380 int java_lang_ThreadGroup::_threads_offset = 0; 1381 int java_lang_ThreadGroup::_groups_offset = 0; 1382 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1383 int java_lang_ThreadGroup::_destroyed_offset = 0; 1384 int java_lang_ThreadGroup::_daemon_offset = 0; 1385 int java_lang_ThreadGroup::_nthreads_offset = 0; 1386 int java_lang_ThreadGroup::_ngroups_offset = 0; 1387 1388 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1389 assert(java_thread_group->is_oop(), "thread group must be oop"); 1390 return java_thread_group->obj_field(_parent_offset); 1391 } 1392 1393 // ("name as oop" accessor is not necessary) 1394 1395 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1396 oop name = java_thread_group->obj_field(_name_offset); 1397 // ThreadGroup.name can be null 1398 if (name != NULL) { 1399 return java_lang_String::as_utf8_string(name); 1400 } 1401 return NULL; 1402 } 1403 1404 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1405 assert(java_thread_group->is_oop(), "thread group must be oop"); 1406 return java_thread_group->int_field(_nthreads_offset); 1407 } 1408 1409 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1410 oop threads = java_thread_group->obj_field(_threads_offset); 1411 assert(threads != NULL, "threadgroups should have threads"); 1412 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1413 return objArrayOop(threads); 1414 } 1415 1416 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1417 assert(java_thread_group->is_oop(), "thread group must be oop"); 1418 return java_thread_group->int_field(_ngroups_offset); 1419 } 1420 1421 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1422 oop groups = java_thread_group->obj_field(_groups_offset); 1423 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1424 return objArrayOop(groups); 1425 } 1426 1427 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1428 assert(java_thread_group->is_oop(), "thread group must be oop"); 1429 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1430 } 1431 1432 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1433 assert(java_thread_group->is_oop(), "thread group must be oop"); 1434 return java_thread_group->bool_field(_destroyed_offset) != 0; 1435 } 1436 1437 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1438 assert(java_thread_group->is_oop(), "thread group must be oop"); 1439 return java_thread_group->bool_field(_daemon_offset) != 0; 1440 } 1441 1442 void java_lang_ThreadGroup::compute_offsets() { 1443 assert(_parent_offset == 0, "offsets should be initialized only once"); 1444 1445 Klass* k = SystemDictionary::ThreadGroup_klass(); 1446 1447 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1448 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1449 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1450 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1451 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1452 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1453 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1454 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1455 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1456 } 1457 1458 1459 void java_lang_Throwable::compute_offsets() { 1460 Klass* k = SystemDictionary::Throwable_klass(); 1461 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1462 } 1463 1464 oop java_lang_Throwable::unassigned_stacktrace() { 1465 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1466 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1467 if (UseCompressedOops) { 1468 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1469 } else { 1470 return oopDesc::load_decode_heap_oop((oop*)addr); 1471 } 1472 } 1473 1474 oop java_lang_Throwable::backtrace(oop throwable) { 1475 return throwable->obj_field_acquire(backtrace_offset); 1476 } 1477 1478 1479 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1480 throwable->release_obj_field_put(backtrace_offset, value); 1481 } 1482 1483 int java_lang_Throwable::depth(oop throwable) { 1484 return throwable->int_field(depth_offset); 1485 } 1486 1487 void java_lang_Throwable::set_depth(oop throwable, int value) { 1488 throwable->int_field_put(depth_offset, value); 1489 } 1490 1491 oop java_lang_Throwable::message(Handle throwable) { 1492 return throwable->obj_field(detailMessage_offset); 1493 } 1494 1495 1496 // Return Symbol for detailed_message or NULL 1497 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1498 PRESERVE_EXCEPTION_MARK; // Keep original exception 1499 oop detailed_message = java_lang_Throwable::message(throwable); 1500 if (detailed_message != NULL) { 1501 return java_lang_String::as_symbol(detailed_message, THREAD); 1502 } 1503 return NULL; 1504 } 1505 1506 void java_lang_Throwable::set_message(oop throwable, oop value) { 1507 throwable->obj_field_put(detailMessage_offset, value); 1508 } 1509 1510 1511 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1512 throwable->obj_field_put(stackTrace_offset, st_element_array); 1513 } 1514 1515 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1516 set_stacktrace(throwable, NULL); 1517 } 1518 1519 1520 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1521 ResourceMark rm; 1522 Klass* k = throwable->klass(); 1523 assert(k != NULL, "just checking"); 1524 st->print("%s", k->external_name()); 1525 oop msg = message(throwable); 1526 if (msg != NULL) { 1527 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1528 } 1529 } 1530 1531 // After this many redefines, the stack trace is unreliable. 1532 const int MAX_VERSION = USHRT_MAX; 1533 1534 static inline bool version_matches(Method* method, int version) { 1535 assert(version < MAX_VERSION, "version is too big"); 1536 return method != NULL && (method->constants()->version() == version); 1537 } 1538 1539 1540 // This class provides a simple wrapper over the internal structure of 1541 // exception backtrace to insulate users of the backtrace from needing 1542 // to know what it looks like. 1543 class BacktraceBuilder: public StackObj { 1544 friend class BacktraceIterator; 1545 private: 1546 Handle _backtrace; 1547 objArrayOop _head; 1548 typeArrayOop _methods; 1549 typeArrayOop _bcis; 1550 objArrayOop _mirrors; 1551 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1552 int _index; 1553 NoSafepointVerifier _nsv; 1554 1555 enum { 1556 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1557 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1558 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1559 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1560 trace_next_offset = java_lang_Throwable::trace_next_offset, 1561 trace_size = java_lang_Throwable::trace_size, 1562 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1563 }; 1564 1565 // get info out of chunks 1566 static typeArrayOop get_methods(objArrayHandle chunk) { 1567 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1568 assert(methods != NULL, "method array should be initialized in backtrace"); 1569 return methods; 1570 } 1571 static typeArrayOop get_bcis(objArrayHandle chunk) { 1572 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1573 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1574 return bcis; 1575 } 1576 static objArrayOop get_mirrors(objArrayHandle chunk) { 1577 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1578 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1579 return mirrors; 1580 } 1581 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1582 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1583 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1584 return cprefs; 1585 } 1586 1587 public: 1588 1589 // constructor for new backtrace 1590 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1591 expand(CHECK); 1592 _backtrace = _head; 1593 _index = 0; 1594 } 1595 1596 BacktraceBuilder(objArrayHandle backtrace) { 1597 _methods = get_methods(backtrace); 1598 _bcis = get_bcis(backtrace); 1599 _mirrors = get_mirrors(backtrace); 1600 _cprefs = get_cprefs(backtrace); 1601 assert(_methods->length() == _bcis->length() && 1602 _methods->length() == _mirrors->length(), 1603 "method and source information arrays should match"); 1604 1605 // head is the preallocated backtrace 1606 _backtrace = _head = backtrace(); 1607 _index = 0; 1608 } 1609 1610 void expand(TRAPS) { 1611 objArrayHandle old_head(THREAD, _head); 1612 PauseNoSafepointVerifier pnsv(&_nsv); 1613 1614 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1615 objArrayHandle new_head(THREAD, head); 1616 1617 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1618 typeArrayHandle new_methods(THREAD, methods); 1619 1620 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1621 typeArrayHandle new_bcis(THREAD, bcis); 1622 1623 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1624 objArrayHandle new_mirrors(THREAD, mirrors); 1625 1626 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1627 typeArrayHandle new_cprefs(THREAD, cprefs); 1628 1629 if (!old_head.is_null()) { 1630 old_head->obj_at_put(trace_next_offset, new_head()); 1631 } 1632 new_head->obj_at_put(trace_methods_offset, new_methods()); 1633 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1634 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1635 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1636 1637 _head = new_head(); 1638 _methods = new_methods(); 1639 _bcis = new_bcis(); 1640 _mirrors = new_mirrors(); 1641 _cprefs = new_cprefs(); 1642 _index = 0; 1643 } 1644 1645 oop backtrace() { 1646 return _backtrace(); 1647 } 1648 1649 inline void push(Method* method, int bci, TRAPS) { 1650 // Smear the -1 bci to 0 since the array only holds unsigned 1651 // shorts. The later line number lookup would just smear the -1 1652 // to a 0 even if it could be recorded. 1653 if (bci == SynchronizationEntryBCI) bci = 0; 1654 1655 if (_index >= trace_chunk_size) { 1656 methodHandle mhandle(THREAD, method); 1657 expand(CHECK); 1658 method = mhandle(); 1659 } 1660 1661 _methods->short_at_put(_index, method->orig_method_idnum()); 1662 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1663 _cprefs->short_at_put(_index, method->name_index()); 1664 1665 // We need to save the mirrors in the backtrace to keep the class 1666 // from being unloaded while we still have this stack trace. 1667 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1668 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1669 _index++; 1670 } 1671 1672 }; 1673 1674 struct BacktraceElement : public StackObj { 1675 int _method_id; 1676 int _bci; 1677 int _version; 1678 int _cpref; 1679 Handle _mirror; 1680 BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) : 1681 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {} 1682 }; 1683 1684 class BacktraceIterator : public StackObj { 1685 int _index; 1686 objArrayHandle _result; 1687 objArrayHandle _mirrors; 1688 typeArrayHandle _methods; 1689 typeArrayHandle _bcis; 1690 typeArrayHandle _cprefs; 1691 1692 void init(objArrayHandle result, Thread* thread) { 1693 // Get method id, bci, version and mirror from chunk 1694 _result = result; 1695 if (_result.not_null()) { 1696 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1697 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1698 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1699 _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result)); 1700 _index = 0; 1701 } 1702 } 1703 public: 1704 BacktraceIterator(objArrayHandle result, Thread* thread) { 1705 init(result, thread); 1706 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1707 } 1708 1709 BacktraceElement next(Thread* thread) { 1710 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1711 _methods->short_at(_index), 1712 Backtrace::version_at(_bcis->int_at(_index)), 1713 Backtrace::bci_at(_bcis->int_at(_index)), 1714 _cprefs->short_at(_index)); 1715 _index++; 1716 1717 if (_index >= java_lang_Throwable::trace_chunk_size) { 1718 int next_offset = java_lang_Throwable::trace_next_offset; 1719 // Get next chunk 1720 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1721 init(result, thread); 1722 } 1723 return e; 1724 } 1725 1726 bool repeat() { 1727 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1728 } 1729 }; 1730 1731 1732 // Print stack trace element to resource allocated buffer 1733 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1734 int version, int bci, int cpref) { 1735 ResourceMark rm; 1736 1737 // Get strings and string lengths 1738 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1739 const char* klass_name = holder->external_name(); 1740 int buf_len = (int)strlen(klass_name); 1741 1742 Method* method = holder->method_with_orig_idnum(method_id, version); 1743 1744 // The method can be NULL if the requested class version is gone 1745 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1746 char* method_name = sym->as_C_string(); 1747 buf_len += (int)strlen(method_name); 1748 1749 char* source_file_name = NULL; 1750 Symbol* source = Backtrace::get_source_file_name(holder, version); 1751 if (source != NULL) { 1752 source_file_name = source->as_C_string(); 1753 buf_len += (int)strlen(source_file_name); 1754 } 1755 1756 char *module_name = NULL, *module_version = NULL; 1757 ModuleEntry* module = holder->module(); 1758 if (module->is_named()) { 1759 module_name = module->name()->as_C_string(); 1760 buf_len += (int)strlen(module_name); 1761 if (module->version() != NULL) { 1762 module_version = module->version()->as_C_string(); 1763 buf_len += (int)strlen(module_version); 1764 } 1765 } 1766 1767 // Allocate temporary buffer with extra space for formatting and line number 1768 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1769 1770 // Print stack trace line in buffer 1771 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1772 1773 // Print module information 1774 if (module_name != NULL) { 1775 if (module_version != NULL) { 1776 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1777 } else { 1778 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1779 } 1780 } 1781 1782 if (!version_matches(method, version)) { 1783 strcat(buf, "Redefined)"); 1784 } else { 1785 int line_number = Backtrace::get_line_number(method, bci); 1786 if (line_number == -2) { 1787 strcat(buf, "Native Method)"); 1788 } else { 1789 if (source_file_name != NULL && (line_number != -1)) { 1790 // Sourcename and linenumber 1791 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1792 } else if (source_file_name != NULL) { 1793 // Just sourcename 1794 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1795 } else { 1796 // Neither sourcename nor linenumber 1797 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1798 } 1799 CompiledMethod* nm = method->code(); 1800 if (WizardMode && nm != NULL) { 1801 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1802 } 1803 } 1804 } 1805 1806 st->print_cr("%s", buf); 1807 } 1808 1809 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1810 Handle mirror = method->method_holder()->java_mirror(); 1811 int method_id = method->orig_method_idnum(); 1812 int version = method->constants()->version(); 1813 int cpref = method->name_index(); 1814 print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref); 1815 } 1816 1817 /** 1818 * Print the throwable message and its stack trace plus all causes by walking the 1819 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1820 */ 1821 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1822 // First, print the message. 1823 print(throwable, st); 1824 st->cr(); 1825 1826 // Now print the stack trace. 1827 Thread* THREAD = Thread::current(); 1828 while (throwable.not_null()) { 1829 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1830 if (result.is_null()) { 1831 st->print_raw_cr("\t<<no stack trace available>>"); 1832 return; 1833 } 1834 BacktraceIterator iter(result, THREAD); 1835 1836 while (iter.repeat()) { 1837 BacktraceElement bte = iter.next(THREAD); 1838 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref); 1839 } 1840 { 1841 // Call getCause() which doesn't necessarily return the _cause field. 1842 EXCEPTION_MARK; 1843 JavaValue cause(T_OBJECT); 1844 JavaCalls::call_virtual(&cause, 1845 throwable, 1846 KlassHandle(THREAD, throwable->klass()), 1847 vmSymbols::getCause_name(), 1848 vmSymbols::void_throwable_signature(), 1849 THREAD); 1850 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1851 if (HAS_PENDING_EXCEPTION) { 1852 CLEAR_PENDING_EXCEPTION; 1853 throwable = Handle(); 1854 } else { 1855 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1856 if (throwable.not_null()) { 1857 st->print("Caused by: "); 1858 print(throwable, st); 1859 st->cr(); 1860 } 1861 } 1862 } 1863 } 1864 } 1865 1866 /** 1867 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1868 */ 1869 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1870 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1871 JavaValue result(T_VOID); 1872 JavaCalls::call_virtual(&result, 1873 throwable, 1874 KlassHandle(THREAD, SystemDictionary::Throwable_klass()), 1875 vmSymbols::printStackTrace_name(), 1876 vmSymbols::void_method_signature(), 1877 THREAD); 1878 } 1879 1880 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1881 if (!StackTraceInThrowable) return; 1882 ResourceMark rm(THREAD); 1883 1884 // Start out by clearing the backtrace for this object, in case the VM 1885 // runs out of memory while allocating the stack trace 1886 set_backtrace(throwable(), NULL); 1887 // Clear lazily constructed Java level stacktrace if refilling occurs 1888 // This is unnecessary in 1.7+ but harmless 1889 clear_stacktrace(throwable()); 1890 1891 int max_depth = MaxJavaStackTraceDepth; 1892 JavaThread* thread = (JavaThread*)THREAD; 1893 1894 BacktraceBuilder bt(CHECK); 1895 1896 // If there is no Java frame just return the method that was being called 1897 // with bci 0 1898 if (!thread->has_last_Java_frame()) { 1899 if (max_depth >= 1 && method() != NULL) { 1900 bt.push(method(), 0, CHECK); 1901 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1902 set_depth(throwable(), 1); 1903 set_backtrace(throwable(), bt.backtrace()); 1904 } 1905 return; 1906 } 1907 1908 // Instead of using vframe directly, this version of fill_in_stack_trace 1909 // basically handles everything by hand. This significantly improved the 1910 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1911 // See bug 6333838 for more details. 1912 // The "ASSERT" here is to verify this method generates the exactly same stack 1913 // trace as utilizing vframe. 1914 #ifdef ASSERT 1915 vframeStream st(thread); 1916 methodHandle st_method(THREAD, st.method()); 1917 #endif 1918 int total_count = 0; 1919 RegisterMap map(thread, false); 1920 int decode_offset = 0; 1921 CompiledMethod* nm = NULL; 1922 bool skip_fillInStackTrace_check = false; 1923 bool skip_throwableInit_check = false; 1924 bool skip_hidden = !ShowHiddenFrames; 1925 1926 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1927 Method* method = NULL; 1928 int bci = 0; 1929 1930 // Compiled java method case. 1931 if (decode_offset != 0) { 1932 DebugInfoReadStream stream(nm, decode_offset); 1933 decode_offset = stream.read_int(); 1934 method = (Method*)nm->metadata_at(stream.read_int()); 1935 bci = stream.read_bci(); 1936 } else { 1937 if (fr.is_first_frame()) break; 1938 address pc = fr.pc(); 1939 if (fr.is_interpreted_frame()) { 1940 address bcp = fr.interpreter_frame_bcp(); 1941 method = fr.interpreter_frame_method(); 1942 bci = method->bci_from(bcp); 1943 fr = fr.sender(&map); 1944 } else { 1945 CodeBlob* cb = fr.cb(); 1946 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1947 // but non nmethod 1948 fr = fr.sender(&map); 1949 if (cb == NULL || !cb->is_compiled()) { 1950 continue; 1951 } 1952 nm = cb->as_compiled_method(); 1953 if (nm->method()->is_native()) { 1954 method = nm->method(); 1955 bci = 0; 1956 } else { 1957 PcDesc* pd = nm->pc_desc_at(pc); 1958 decode_offset = pd->scope_decode_offset(); 1959 // if decode_offset is not equal to 0, it will execute the 1960 // "compiled java method case" at the beginning of the loop. 1961 continue; 1962 } 1963 } 1964 } 1965 #ifdef ASSERT 1966 assert(st_method() == method && st.bci() == bci, 1967 "Wrong stack trace"); 1968 st.next(); 1969 // vframeStream::method isn't GC-safe so store off a copy 1970 // of the Method* in case we GC. 1971 if (!st.at_end()) { 1972 st_method = st.method(); 1973 } 1974 #endif 1975 1976 // the format of the stacktrace will be: 1977 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1978 // - 0 or more <init> methods for the exception class (skipped) 1979 // - rest of the stack 1980 1981 if (!skip_fillInStackTrace_check) { 1982 if (method->name() == vmSymbols::fillInStackTrace_name() && 1983 throwable->is_a(method->method_holder())) { 1984 continue; 1985 } 1986 else { 1987 skip_fillInStackTrace_check = true; // gone past them all 1988 } 1989 } 1990 if (!skip_throwableInit_check) { 1991 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1992 1993 // skip <init> methods of the exception class and superclasses 1994 // This is simlar to classic VM. 1995 if (method->name() == vmSymbols::object_initializer_name() && 1996 throwable->is_a(method->method_holder())) { 1997 continue; 1998 } else { 1999 // there are none or we've seen them all - either way stop checking 2000 skip_throwableInit_check = true; 2001 } 2002 } 2003 if (method->is_hidden()) { 2004 if (skip_hidden) continue; 2005 } 2006 bt.push(method, bci, CHECK); 2007 total_count++; 2008 } 2009 2010 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2011 2012 // Put completed stack trace into throwable object 2013 set_backtrace(throwable(), bt.backtrace()); 2014 set_depth(throwable(), total_count); 2015 } 2016 2017 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2018 // No-op if stack trace is disabled 2019 if (!StackTraceInThrowable) { 2020 return; 2021 } 2022 2023 // Disable stack traces for some preallocated out of memory errors 2024 if (!Universe::should_fill_in_stack_trace(throwable)) { 2025 return; 2026 } 2027 2028 PRESERVE_EXCEPTION_MARK; 2029 2030 JavaThread* thread = JavaThread::active(); 2031 fill_in_stack_trace(throwable, method, thread); 2032 // ignore exceptions thrown during stack trace filling 2033 CLEAR_PENDING_EXCEPTION; 2034 } 2035 2036 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2037 // Allocate stack trace - backtrace is created but not filled in 2038 2039 // No-op if stack trace is disabled 2040 if (!StackTraceInThrowable) return; 2041 BacktraceBuilder bt(CHECK); // creates a backtrace 2042 set_backtrace(throwable(), bt.backtrace()); 2043 } 2044 2045 2046 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2047 // Fill in stack trace into preallocated backtrace (no GC) 2048 2049 // No-op if stack trace is disabled 2050 if (!StackTraceInThrowable) return; 2051 2052 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2053 2054 JavaThread* THREAD = JavaThread::current(); 2055 2056 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2057 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2058 2059 ResourceMark rm(THREAD); 2060 vframeStream st(THREAD); 2061 2062 BacktraceBuilder bt(backtrace); 2063 2064 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2065 // methods as preallocated errors aren't created by "java" code. 2066 2067 // fill in as much stack trace as possible 2068 int chunk_count = 0; 2069 for (;!st.at_end(); st.next()) { 2070 bt.push(st.method(), st.bci(), CHECK); 2071 chunk_count++; 2072 2073 // Bail-out for deep stacks 2074 if (chunk_count >= trace_chunk_size) break; 2075 } 2076 set_depth(throwable(), chunk_count); 2077 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2078 2079 // We support the Throwable immutability protocol defined for Java 7. 2080 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2081 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2082 } 2083 2084 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2085 objArrayHandle stack_trace_array_h, TRAPS) { 2086 2087 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2088 THROW(vmSymbols::java_lang_NullPointerException()); 2089 } 2090 2091 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2092 2093 if (stack_trace_array_h->length() != depth(throwable())) { 2094 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2095 } 2096 2097 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2098 BacktraceIterator iter(result, THREAD); 2099 2100 int index = 0; 2101 while (iter.repeat()) { 2102 BacktraceElement bte = iter.next(THREAD); 2103 2104 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2105 2106 if (stack_trace_element.is_null()) { 2107 THROW(vmSymbols::java_lang_NullPointerException()); 2108 } 2109 2110 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2111 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2112 2113 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2114 method, 2115 bte._version, 2116 bte._bci, 2117 bte._cpref, CHECK); 2118 } 2119 } 2120 2121 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2122 // Allocate java.lang.StackTraceElement instance 2123 Klass* k = SystemDictionary::StackTraceElement_klass(); 2124 assert(k != NULL, "must be loaded in 1.4+"); 2125 instanceKlassHandle ik (THREAD, k); 2126 if (ik->should_be_initialized()) { 2127 ik->initialize(CHECK_0); 2128 } 2129 2130 Handle element = ik->allocate_instance_handle(CHECK_0); 2131 2132 int cpref = method->name_index(); 2133 int version = method->constants()->version(); 2134 fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0); 2135 return element(); 2136 } 2137 2138 void java_lang_StackTraceElement::fill_in(Handle element, 2139 InstanceKlass* holder, const methodHandle& method, 2140 int version, int bci, int cpref, TRAPS) { 2141 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2142 2143 // Fill in class name 2144 ResourceMark rm(THREAD); 2145 const char* str = holder->external_name(); 2146 oop classname = StringTable::intern((char*) str, CHECK); 2147 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2148 2149 // The method can be NULL if the requested class version is gone 2150 Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref); 2151 2152 // Fill in method name 2153 oop methodname = StringTable::intern(sym, CHECK); 2154 java_lang_StackTraceElement::set_methodName(element(), methodname); 2155 2156 // Fill in module name and version 2157 ModuleEntry* module = holder->module(); 2158 if (module->is_named()) { 2159 oop module_name = StringTable::intern(module->name(), CHECK); 2160 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2161 oop module_version; 2162 if (module->version() != NULL) { 2163 module_version = StringTable::intern(module->version(), CHECK); 2164 } else { 2165 module_version = NULL; 2166 } 2167 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2168 } 2169 2170 if (!version_matches(method(), version)) { 2171 // The method was redefined, accurate line number information isn't available 2172 java_lang_StackTraceElement::set_fileName(element(), NULL); 2173 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2174 } else { 2175 // Fill in source file name and line number. 2176 Symbol* source = Backtrace::get_source_file_name(holder, version); 2177 if (ShowHiddenFrames && source == NULL) 2178 source = vmSymbols::unknown_class_name(); 2179 oop filename = StringTable::intern(source, CHECK); 2180 java_lang_StackTraceElement::set_fileName(element(), filename); 2181 2182 int line_number = Backtrace::get_line_number(method, bci); 2183 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2184 } 2185 } 2186 2187 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2188 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2189 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2190 // we should expand MemberName::name when Throwable uses StackTrace 2191 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2192 return method; 2193 } 2194 2195 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2196 // set Method* or mid/cpref 2197 oop mname = stackFrame->obj_field(_memberName_offset); 2198 InstanceKlass* ik = method->method_holder(); 2199 CallInfo info(method(), ik); 2200 MethodHandles::init_method_MemberName(mname, info); 2201 // set bci 2202 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2203 // method may be redefined; store the version 2204 int version = method->constants()->version(); 2205 assert((jushort)version == version, "version should be short"); 2206 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2207 } 2208 2209 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2210 ResourceMark rm(THREAD); 2211 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2212 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2213 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2214 2215 short version = stackFrame->short_field(_version_offset); 2216 short bci = stackFrame->short_field(_bci_offset); 2217 int cpref = method->name_index(); 2218 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK); 2219 } 2220 2221 void java_lang_StackFrameInfo::compute_offsets() { 2222 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2223 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2224 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2225 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2226 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2227 } 2228 2229 void java_lang_LiveStackFrameInfo::compute_offsets() { 2230 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2231 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2232 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2233 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2234 } 2235 2236 void java_lang_reflect_AccessibleObject::compute_offsets() { 2237 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2238 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2239 } 2240 2241 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2243 return (jboolean) reflect->bool_field(override_offset); 2244 } 2245 2246 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2248 reflect->bool_field_put(override_offset, (int) value); 2249 } 2250 2251 void java_lang_reflect_Method::compute_offsets() { 2252 Klass* k = SystemDictionary::reflect_Method_klass(); 2253 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2254 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2255 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2256 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2257 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2258 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2259 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2260 // The generic signature and annotations fields are only present in 1.5 2261 signature_offset = -1; 2262 annotations_offset = -1; 2263 parameter_annotations_offset = -1; 2264 annotation_default_offset = -1; 2265 type_annotations_offset = -1; 2266 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2267 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2268 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2269 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2270 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2271 } 2272 2273 Handle java_lang_reflect_Method::create(TRAPS) { 2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2275 Klass* klass = SystemDictionary::reflect_Method_klass(); 2276 // This class is eagerly initialized during VM initialization, since we keep a refence 2277 // to one of the methods 2278 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2279 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2280 } 2281 2282 oop java_lang_reflect_Method::clazz(oop reflect) { 2283 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2284 return reflect->obj_field(clazz_offset); 2285 } 2286 2287 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2289 reflect->obj_field_put(clazz_offset, value); 2290 } 2291 2292 int java_lang_reflect_Method::slot(oop reflect) { 2293 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2294 return reflect->int_field(slot_offset); 2295 } 2296 2297 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2299 reflect->int_field_put(slot_offset, value); 2300 } 2301 2302 oop java_lang_reflect_Method::name(oop method) { 2303 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2304 return method->obj_field(name_offset); 2305 } 2306 2307 void java_lang_reflect_Method::set_name(oop method, oop value) { 2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2309 method->obj_field_put(name_offset, value); 2310 } 2311 2312 oop java_lang_reflect_Method::return_type(oop method) { 2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2314 return method->obj_field(returnType_offset); 2315 } 2316 2317 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2319 method->obj_field_put(returnType_offset, value); 2320 } 2321 2322 oop java_lang_reflect_Method::parameter_types(oop method) { 2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2324 return method->obj_field(parameterTypes_offset); 2325 } 2326 2327 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2329 method->obj_field_put(parameterTypes_offset, value); 2330 } 2331 2332 oop java_lang_reflect_Method::exception_types(oop method) { 2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2334 return method->obj_field(exceptionTypes_offset); 2335 } 2336 2337 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2339 method->obj_field_put(exceptionTypes_offset, value); 2340 } 2341 2342 int java_lang_reflect_Method::modifiers(oop method) { 2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2344 return method->int_field(modifiers_offset); 2345 } 2346 2347 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2348 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2349 method->int_field_put(modifiers_offset, value); 2350 } 2351 2352 bool java_lang_reflect_Method::has_signature_field() { 2353 return (signature_offset >= 0); 2354 } 2355 2356 oop java_lang_reflect_Method::signature(oop method) { 2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2358 assert(has_signature_field(), "signature field must be present"); 2359 return method->obj_field(signature_offset); 2360 } 2361 2362 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2364 assert(has_signature_field(), "signature field must be present"); 2365 method->obj_field_put(signature_offset, value); 2366 } 2367 2368 bool java_lang_reflect_Method::has_annotations_field() { 2369 return (annotations_offset >= 0); 2370 } 2371 2372 oop java_lang_reflect_Method::annotations(oop method) { 2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2374 assert(has_annotations_field(), "annotations field must be present"); 2375 return method->obj_field(annotations_offset); 2376 } 2377 2378 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2379 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2380 assert(has_annotations_field(), "annotations field must be present"); 2381 method->obj_field_put(annotations_offset, value); 2382 } 2383 2384 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2385 return (parameter_annotations_offset >= 0); 2386 } 2387 2388 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2389 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2390 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2391 return method->obj_field(parameter_annotations_offset); 2392 } 2393 2394 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2396 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2397 method->obj_field_put(parameter_annotations_offset, value); 2398 } 2399 2400 bool java_lang_reflect_Method::has_annotation_default_field() { 2401 return (annotation_default_offset >= 0); 2402 } 2403 2404 oop java_lang_reflect_Method::annotation_default(oop method) { 2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2406 assert(has_annotation_default_field(), "annotation default field must be present"); 2407 return method->obj_field(annotation_default_offset); 2408 } 2409 2410 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2412 assert(has_annotation_default_field(), "annotation default field must be present"); 2413 method->obj_field_put(annotation_default_offset, value); 2414 } 2415 2416 bool java_lang_reflect_Method::has_type_annotations_field() { 2417 return (type_annotations_offset >= 0); 2418 } 2419 2420 oop java_lang_reflect_Method::type_annotations(oop method) { 2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2422 assert(has_type_annotations_field(), "type_annotations field must be present"); 2423 return method->obj_field(type_annotations_offset); 2424 } 2425 2426 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2428 assert(has_type_annotations_field(), "type_annotations field must be present"); 2429 method->obj_field_put(type_annotations_offset, value); 2430 } 2431 2432 void java_lang_reflect_Constructor::compute_offsets() { 2433 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2434 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2435 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2436 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2437 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2438 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2439 // The generic signature and annotations fields are only present in 1.5 2440 signature_offset = -1; 2441 annotations_offset = -1; 2442 parameter_annotations_offset = -1; 2443 type_annotations_offset = -1; 2444 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2445 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2446 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2447 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2448 } 2449 2450 Handle java_lang_reflect_Constructor::create(TRAPS) { 2451 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2452 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2453 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2454 instanceKlassHandle klass (THREAD, k); 2455 // Ensure it is initialized 2456 klass->initialize(CHECK_NH); 2457 return klass->allocate_instance_handle(THREAD); 2458 } 2459 2460 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2461 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2462 return reflect->obj_field(clazz_offset); 2463 } 2464 2465 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2467 reflect->obj_field_put(clazz_offset, value); 2468 } 2469 2470 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2472 return constructor->obj_field(parameterTypes_offset); 2473 } 2474 2475 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2476 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2477 constructor->obj_field_put(parameterTypes_offset, value); 2478 } 2479 2480 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2481 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2482 return constructor->obj_field(exceptionTypes_offset); 2483 } 2484 2485 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2487 constructor->obj_field_put(exceptionTypes_offset, value); 2488 } 2489 2490 int java_lang_reflect_Constructor::slot(oop reflect) { 2491 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2492 return reflect->int_field(slot_offset); 2493 } 2494 2495 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2496 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2497 reflect->int_field_put(slot_offset, value); 2498 } 2499 2500 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2501 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2502 return constructor->int_field(modifiers_offset); 2503 } 2504 2505 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2506 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2507 constructor->int_field_put(modifiers_offset, value); 2508 } 2509 2510 bool java_lang_reflect_Constructor::has_signature_field() { 2511 return (signature_offset >= 0); 2512 } 2513 2514 oop java_lang_reflect_Constructor::signature(oop constructor) { 2515 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2516 assert(has_signature_field(), "signature field must be present"); 2517 return constructor->obj_field(signature_offset); 2518 } 2519 2520 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2521 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2522 assert(has_signature_field(), "signature field must be present"); 2523 constructor->obj_field_put(signature_offset, value); 2524 } 2525 2526 bool java_lang_reflect_Constructor::has_annotations_field() { 2527 return (annotations_offset >= 0); 2528 } 2529 2530 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2531 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2532 assert(has_annotations_field(), "annotations field must be present"); 2533 return constructor->obj_field(annotations_offset); 2534 } 2535 2536 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2538 assert(has_annotations_field(), "annotations field must be present"); 2539 constructor->obj_field_put(annotations_offset, value); 2540 } 2541 2542 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2543 return (parameter_annotations_offset >= 0); 2544 } 2545 2546 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2548 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2549 return method->obj_field(parameter_annotations_offset); 2550 } 2551 2552 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2554 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2555 method->obj_field_put(parameter_annotations_offset, value); 2556 } 2557 2558 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2559 return (type_annotations_offset >= 0); 2560 } 2561 2562 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2563 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2564 assert(has_type_annotations_field(), "type_annotations field must be present"); 2565 return constructor->obj_field(type_annotations_offset); 2566 } 2567 2568 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2569 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2570 assert(has_type_annotations_field(), "type_annotations field must be present"); 2571 constructor->obj_field_put(type_annotations_offset, value); 2572 } 2573 2574 void java_lang_reflect_Field::compute_offsets() { 2575 Klass* k = SystemDictionary::reflect_Field_klass(); 2576 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2577 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2578 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2579 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2580 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2581 // The generic signature and annotations fields are only present in 1.5 2582 signature_offset = -1; 2583 annotations_offset = -1; 2584 type_annotations_offset = -1; 2585 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2586 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2587 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2588 } 2589 2590 Handle java_lang_reflect_Field::create(TRAPS) { 2591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2592 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2593 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2594 instanceKlassHandle klass (THREAD, k); 2595 // Ensure it is initialized 2596 klass->initialize(CHECK_NH); 2597 return klass->allocate_instance_handle(THREAD); 2598 } 2599 2600 oop java_lang_reflect_Field::clazz(oop reflect) { 2601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2602 return reflect->obj_field(clazz_offset); 2603 } 2604 2605 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2606 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2607 reflect->obj_field_put(clazz_offset, value); 2608 } 2609 2610 oop java_lang_reflect_Field::name(oop field) { 2611 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2612 return field->obj_field(name_offset); 2613 } 2614 2615 void java_lang_reflect_Field::set_name(oop field, oop value) { 2616 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2617 field->obj_field_put(name_offset, value); 2618 } 2619 2620 oop java_lang_reflect_Field::type(oop field) { 2621 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2622 return field->obj_field(type_offset); 2623 } 2624 2625 void java_lang_reflect_Field::set_type(oop field, oop value) { 2626 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2627 field->obj_field_put(type_offset, value); 2628 } 2629 2630 int java_lang_reflect_Field::slot(oop reflect) { 2631 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2632 return reflect->int_field(slot_offset); 2633 } 2634 2635 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2636 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2637 reflect->int_field_put(slot_offset, value); 2638 } 2639 2640 int java_lang_reflect_Field::modifiers(oop field) { 2641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2642 return field->int_field(modifiers_offset); 2643 } 2644 2645 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2646 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2647 field->int_field_put(modifiers_offset, value); 2648 } 2649 2650 bool java_lang_reflect_Field::has_signature_field() { 2651 return (signature_offset >= 0); 2652 } 2653 2654 oop java_lang_reflect_Field::signature(oop field) { 2655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2656 assert(has_signature_field(), "signature field must be present"); 2657 return field->obj_field(signature_offset); 2658 } 2659 2660 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2662 assert(has_signature_field(), "signature field must be present"); 2663 field->obj_field_put(signature_offset, value); 2664 } 2665 2666 bool java_lang_reflect_Field::has_annotations_field() { 2667 return (annotations_offset >= 0); 2668 } 2669 2670 oop java_lang_reflect_Field::annotations(oop field) { 2671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2672 assert(has_annotations_field(), "annotations field must be present"); 2673 return field->obj_field(annotations_offset); 2674 } 2675 2676 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2678 assert(has_annotations_field(), "annotations field must be present"); 2679 field->obj_field_put(annotations_offset, value); 2680 } 2681 2682 bool java_lang_reflect_Field::has_type_annotations_field() { 2683 return (type_annotations_offset >= 0); 2684 } 2685 2686 oop java_lang_reflect_Field::type_annotations(oop field) { 2687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2688 assert(has_type_annotations_field(), "type_annotations field must be present"); 2689 return field->obj_field(type_annotations_offset); 2690 } 2691 2692 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2694 assert(has_type_annotations_field(), "type_annotations field must be present"); 2695 field->obj_field_put(type_annotations_offset, value); 2696 } 2697 2698 void reflect_ConstantPool::compute_offsets() { 2699 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2700 // This null test can be removed post beta 2701 if (k != NULL) { 2702 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2703 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2704 } 2705 } 2706 2707 void java_lang_reflect_Parameter::compute_offsets() { 2708 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2709 if(NULL != k) { 2710 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2711 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2712 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2713 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2714 } 2715 } 2716 2717 Handle java_lang_reflect_Parameter::create(TRAPS) { 2718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2719 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2720 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2721 instanceKlassHandle klass (THREAD, k); 2722 // Ensure it is initialized 2723 klass->initialize(CHECK_NH); 2724 return klass->allocate_instance_handle(THREAD); 2725 } 2726 2727 oop java_lang_reflect_Parameter::name(oop param) { 2728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2729 return param->obj_field(name_offset); 2730 } 2731 2732 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2733 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2734 param->obj_field_put(name_offset, value); 2735 } 2736 2737 int java_lang_reflect_Parameter::modifiers(oop param) { 2738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2739 return param->int_field(modifiers_offset); 2740 } 2741 2742 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2744 param->int_field_put(modifiers_offset, value); 2745 } 2746 2747 int java_lang_reflect_Parameter::index(oop param) { 2748 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2749 return param->int_field(index_offset); 2750 } 2751 2752 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2753 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2754 param->int_field_put(index_offset, value); 2755 } 2756 2757 oop java_lang_reflect_Parameter::executable(oop param) { 2758 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2759 return param->obj_field(executable_offset); 2760 } 2761 2762 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2763 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2764 param->obj_field_put(executable_offset, value); 2765 } 2766 2767 2768 int java_lang_reflect_Module::loader_offset; 2769 int java_lang_reflect_Module::name_offset; 2770 int java_lang_reflect_Module::_module_entry_offset = -1; 2771 2772 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) { 2773 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2774 2775 Symbol* name = vmSymbols::java_lang_reflect_Module(); 2776 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2777 instanceKlassHandle klass (THREAD, k); 2778 2779 Handle jlrmh = klass->allocate_instance_handle(CHECK_NH); 2780 JavaValue result(T_VOID); 2781 JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()), 2782 vmSymbols::object_initializer_name(), 2783 vmSymbols::java_lang_reflect_module_init_signature(), 2784 loader, module_name, CHECK_NH); 2785 return jlrmh; 2786 } 2787 2788 void java_lang_reflect_Module::compute_offsets() { 2789 Klass* k = SystemDictionary::reflect_Module_klass(); 2790 if(NULL != k) { 2791 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2792 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2793 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2794 } 2795 } 2796 2797 2798 oop java_lang_reflect_Module::loader(oop module) { 2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2800 return module->obj_field(loader_offset); 2801 } 2802 2803 void java_lang_reflect_Module::set_loader(oop module, oop value) { 2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2805 module->obj_field_put(loader_offset, value); 2806 } 2807 2808 oop java_lang_reflect_Module::name(oop module) { 2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2810 return module->obj_field(name_offset); 2811 } 2812 2813 void java_lang_reflect_Module::set_name(oop module, oop value) { 2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2815 module->obj_field_put(name_offset, value); 2816 } 2817 2818 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) { 2819 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2820 assert(module != NULL, "module can't be null"); 2821 assert(module->is_oop(), "module must be oop"); 2822 2823 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2824 if (module_entry == NULL) { 2825 // If the inject field containing the ModuleEntry* is null then return the 2826 // class loader's unnamed module. 2827 oop loader = java_lang_reflect_Module::loader(module); 2828 Handle h_loader = Handle(THREAD, loader); 2829 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2830 return loader_cld->modules()->unnamed_module(); 2831 } 2832 return module_entry; 2833 } 2834 2835 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2836 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2837 assert(module != NULL, "module can't be null"); 2838 assert(module->is_oop(), "module must be oop"); 2839 module->address_field_put(_module_entry_offset, (address)module_entry); 2840 } 2841 2842 Handle reflect_ConstantPool::create(TRAPS) { 2843 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2844 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2845 instanceKlassHandle klass (THREAD, k); 2846 // Ensure it is initialized 2847 klass->initialize(CHECK_NH); 2848 return klass->allocate_instance_handle(THREAD); 2849 } 2850 2851 2852 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2853 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2854 oop mirror = value->pool_holder()->java_mirror(); 2855 // Save the mirror to get back the constant pool. 2856 reflect->obj_field_put(_oop_offset, mirror); 2857 } 2858 2859 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2861 2862 oop mirror = reflect->obj_field(_oop_offset); 2863 Klass* k = java_lang_Class::as_Klass(mirror); 2864 assert(k->is_instance_klass(), "Must be"); 2865 2866 // Get the constant pool back from the klass. Since class redefinition 2867 // merges the new constant pool into the old, this is essentially the 2868 // same constant pool as the original. If constant pool merging is 2869 // no longer done in the future, this will have to change to save 2870 // the original. 2871 return InstanceKlass::cast(k)->constants(); 2872 } 2873 2874 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2875 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2876 // This null test can be removed post beta 2877 if (k != NULL) { 2878 compute_offset(_base_offset, k, 2879 vmSymbols::base_name(), vmSymbols::object_signature()); 2880 } 2881 } 2882 2883 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2884 Klass* k = SystemDictionary::box_klass(type); 2885 if (k == NULL) return NULL; 2886 instanceKlassHandle h (THREAD, k); 2887 if (!h->is_initialized()) h->initialize(CHECK_0); 2888 return h->allocate_instance(THREAD); 2889 } 2890 2891 2892 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2893 oop box = initialize_and_allocate(type, CHECK_0); 2894 if (box == NULL) return NULL; 2895 switch (type) { 2896 case T_BOOLEAN: 2897 box->bool_field_put(value_offset, value->z); 2898 break; 2899 case T_CHAR: 2900 box->char_field_put(value_offset, value->c); 2901 break; 2902 case T_FLOAT: 2903 box->float_field_put(value_offset, value->f); 2904 break; 2905 case T_DOUBLE: 2906 box->double_field_put(long_value_offset, value->d); 2907 break; 2908 case T_BYTE: 2909 box->byte_field_put(value_offset, value->b); 2910 break; 2911 case T_SHORT: 2912 box->short_field_put(value_offset, value->s); 2913 break; 2914 case T_INT: 2915 box->int_field_put(value_offset, value->i); 2916 break; 2917 case T_LONG: 2918 box->long_field_put(long_value_offset, value->j); 2919 break; 2920 default: 2921 return NULL; 2922 } 2923 return box; 2924 } 2925 2926 2927 BasicType java_lang_boxing_object::basic_type(oop box) { 2928 if (box == NULL) return T_ILLEGAL; 2929 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2930 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2931 return T_ILLEGAL; 2932 return type; 2933 } 2934 2935 2936 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2937 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2938 switch (type) { 2939 case T_BOOLEAN: 2940 value->z = box->bool_field(value_offset); 2941 break; 2942 case T_CHAR: 2943 value->c = box->char_field(value_offset); 2944 break; 2945 case T_FLOAT: 2946 value->f = box->float_field(value_offset); 2947 break; 2948 case T_DOUBLE: 2949 value->d = box->double_field(long_value_offset); 2950 break; 2951 case T_BYTE: 2952 value->b = box->byte_field(value_offset); 2953 break; 2954 case T_SHORT: 2955 value->s = box->short_field(value_offset); 2956 break; 2957 case T_INT: 2958 value->i = box->int_field(value_offset); 2959 break; 2960 case T_LONG: 2961 value->j = box->long_field(long_value_offset); 2962 break; 2963 default: 2964 return T_ILLEGAL; 2965 } // end switch 2966 return type; 2967 } 2968 2969 2970 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2971 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2972 switch (type) { 2973 case T_BOOLEAN: 2974 box->bool_field_put(value_offset, value->z); 2975 break; 2976 case T_CHAR: 2977 box->char_field_put(value_offset, value->c); 2978 break; 2979 case T_FLOAT: 2980 box->float_field_put(value_offset, value->f); 2981 break; 2982 case T_DOUBLE: 2983 box->double_field_put(long_value_offset, value->d); 2984 break; 2985 case T_BYTE: 2986 box->byte_field_put(value_offset, value->b); 2987 break; 2988 case T_SHORT: 2989 box->short_field_put(value_offset, value->s); 2990 break; 2991 case T_INT: 2992 box->int_field_put(value_offset, value->i); 2993 break; 2994 case T_LONG: 2995 box->long_field_put(long_value_offset, value->j); 2996 break; 2997 default: 2998 return T_ILLEGAL; 2999 } // end switch 3000 return type; 3001 } 3002 3003 3004 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3005 switch (type) { 3006 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3007 case T_CHAR: st->print("%d", value->c); break; 3008 case T_BYTE: st->print("%d", value->b); break; 3009 case T_SHORT: st->print("%d", value->s); break; 3010 case T_INT: st->print("%d", value->i); break; 3011 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3012 case T_FLOAT: st->print("%f", value->f); break; 3013 case T_DOUBLE: st->print("%lf", value->d); break; 3014 default: st->print("type %d?", type); break; 3015 } 3016 } 3017 3018 // Support for java_lang_ref_SoftReference 3019 3020 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3021 return ref->long_field(timestamp_offset); 3022 } 3023 3024 jlong java_lang_ref_SoftReference::clock() { 3025 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3026 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3027 return *offset; 3028 } 3029 3030 void java_lang_ref_SoftReference::set_clock(jlong value) { 3031 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3032 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3033 *offset = value; 3034 } 3035 3036 // Support for java_lang_invoke_DirectMethodHandle 3037 3038 int java_lang_invoke_DirectMethodHandle::_member_offset; 3039 3040 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3041 oop member_name = NULL; 3042 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3043 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3044 if (is_dmh) { 3045 member_name = dmh->obj_field(member_offset_in_bytes()); 3046 } 3047 return member_name; 3048 } 3049 3050 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3051 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3052 if (klass_oop != NULL) { 3053 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3054 } 3055 } 3056 3057 // Support for java_lang_invoke_MethodHandle 3058 3059 int java_lang_invoke_MethodHandle::_type_offset; 3060 int java_lang_invoke_MethodHandle::_form_offset; 3061 3062 int java_lang_invoke_MemberName::_clazz_offset; 3063 int java_lang_invoke_MemberName::_name_offset; 3064 int java_lang_invoke_MemberName::_type_offset; 3065 int java_lang_invoke_MemberName::_flags_offset; 3066 int java_lang_invoke_MemberName::_vmtarget_offset; 3067 int java_lang_invoke_MemberName::_vmloader_offset; 3068 int java_lang_invoke_MemberName::_vmindex_offset; 3069 3070 int java_lang_invoke_LambdaForm::_vmentry_offset; 3071 3072 void java_lang_invoke_MethodHandle::compute_offsets() { 3073 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3074 if (klass_oop != NULL) { 3075 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3076 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3077 } 3078 } 3079 3080 void java_lang_invoke_MemberName::compute_offsets() { 3081 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3082 if (klass_oop != NULL) { 3083 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3084 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3085 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3086 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3087 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3088 } 3089 } 3090 3091 void java_lang_invoke_LambdaForm::compute_offsets() { 3092 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3093 if (klass_oop != NULL) { 3094 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3095 } 3096 } 3097 3098 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3099 return obj != NULL && is_subclass(obj->klass()); 3100 } 3101 3102 3103 oop java_lang_invoke_MethodHandle::type(oop mh) { 3104 return mh->obj_field(_type_offset); 3105 } 3106 3107 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3108 mh->obj_field_put(_type_offset, mtype); 3109 } 3110 3111 oop java_lang_invoke_MethodHandle::form(oop mh) { 3112 assert(_form_offset != 0, ""); 3113 return mh->obj_field(_form_offset); 3114 } 3115 3116 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3117 assert(_form_offset != 0, ""); 3118 mh->obj_field_put(_form_offset, lform); 3119 } 3120 3121 /// MemberName accessors 3122 3123 oop java_lang_invoke_MemberName::clazz(oop mname) { 3124 assert(is_instance(mname), "wrong type"); 3125 return mname->obj_field(_clazz_offset); 3126 } 3127 3128 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3129 assert(is_instance(mname), "wrong type"); 3130 mname->obj_field_put(_clazz_offset, clazz); 3131 } 3132 3133 oop java_lang_invoke_MemberName::name(oop mname) { 3134 assert(is_instance(mname), "wrong type"); 3135 return mname->obj_field(_name_offset); 3136 } 3137 3138 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3139 assert(is_instance(mname), "wrong type"); 3140 mname->obj_field_put(_name_offset, name); 3141 } 3142 3143 oop java_lang_invoke_MemberName::type(oop mname) { 3144 assert(is_instance(mname), "wrong type"); 3145 return mname->obj_field(_type_offset); 3146 } 3147 3148 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3149 assert(is_instance(mname), "wrong type"); 3150 mname->obj_field_put(_type_offset, type); 3151 } 3152 3153 int java_lang_invoke_MemberName::flags(oop mname) { 3154 assert(is_instance(mname), "wrong type"); 3155 return mname->int_field(_flags_offset); 3156 } 3157 3158 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3159 assert(is_instance(mname), "wrong type"); 3160 mname->int_field_put(_flags_offset, flags); 3161 } 3162 3163 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3164 assert(is_instance(mname), "wrong type"); 3165 return (Metadata*)mname->address_field(_vmtarget_offset); 3166 } 3167 3168 bool java_lang_invoke_MemberName::is_method(oop mname) { 3169 assert(is_instance(mname), "must be MemberName"); 3170 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3171 } 3172 3173 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3174 assert(is_instance(mname), "wrong type"); 3175 // check the type of the vmtarget 3176 oop dependency = NULL; 3177 if (ref != NULL) { 3178 switch (flags(mname) & (MN_IS_METHOD | 3179 MN_IS_CONSTRUCTOR | 3180 MN_IS_FIELD)) { 3181 case MN_IS_METHOD: 3182 case MN_IS_CONSTRUCTOR: 3183 assert(ref->is_method(), "should be a method"); 3184 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3185 break; 3186 case MN_IS_FIELD: 3187 assert(ref->is_klass(), "should be a class"); 3188 dependency = ((Klass*)ref)->java_mirror(); 3189 break; 3190 default: 3191 ShouldNotReachHere(); 3192 } 3193 } 3194 mname->address_field_put(_vmtarget_offset, (address)ref); 3195 // Add a reference to the loader (actually mirror because anonymous classes will not have 3196 // distinct loaders) to ensure the metadata is kept alive 3197 // This mirror may be different than the one in clazz field. 3198 mname->obj_field_put(_vmloader_offset, dependency); 3199 } 3200 3201 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3202 assert(is_instance(mname), "wrong type"); 3203 return (intptr_t) mname->address_field(_vmindex_offset); 3204 } 3205 3206 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3207 assert(is_instance(mname), "wrong type"); 3208 mname->address_field_put(_vmindex_offset, (address) index); 3209 } 3210 3211 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) { 3212 if (mn1 == mn2) { 3213 return true; 3214 } 3215 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) && 3216 vmindex(mn1) == vmindex(mn2) && 3217 clazz(mn1) == clazz(mn2)); 3218 } 3219 3220 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3221 assert(is_instance(lform), "wrong type"); 3222 return lform->obj_field(_vmentry_offset); 3223 } 3224 3225 3226 // Support for java_lang_invoke_MethodType 3227 3228 int java_lang_invoke_MethodType::_rtype_offset; 3229 int java_lang_invoke_MethodType::_ptypes_offset; 3230 3231 void java_lang_invoke_MethodType::compute_offsets() { 3232 Klass* k = SystemDictionary::MethodType_klass(); 3233 if (k != NULL) { 3234 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3235 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3236 } 3237 } 3238 3239 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3240 st->print("("); 3241 objArrayOop pts = ptypes(mt); 3242 for (int i = 0, limit = pts->length(); i < limit; i++) { 3243 java_lang_Class::print_signature(pts->obj_at(i), st); 3244 } 3245 st->print(")"); 3246 java_lang_Class::print_signature(rtype(mt), st); 3247 } 3248 3249 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3250 ResourceMark rm; 3251 stringStream buffer(128); 3252 print_signature(mt, &buffer); 3253 const char* sigstr = buffer.base(); 3254 int siglen = (int) buffer.size(); 3255 Symbol *name; 3256 if (!intern_if_not_found) { 3257 name = SymbolTable::probe(sigstr, siglen); 3258 } else { 3259 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3260 } 3261 return name; 3262 } 3263 3264 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3265 if (mt1 == mt2) 3266 return true; 3267 if (rtype(mt1) != rtype(mt2)) 3268 return false; 3269 if (ptype_count(mt1) != ptype_count(mt2)) 3270 return false; 3271 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3272 if (ptype(mt1, i) != ptype(mt2, i)) 3273 return false; 3274 } 3275 return true; 3276 } 3277 3278 oop java_lang_invoke_MethodType::rtype(oop mt) { 3279 assert(is_instance(mt), "must be a MethodType"); 3280 return mt->obj_field(_rtype_offset); 3281 } 3282 3283 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3284 assert(is_instance(mt), "must be a MethodType"); 3285 return (objArrayOop) mt->obj_field(_ptypes_offset); 3286 } 3287 3288 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3289 return ptypes(mt)->obj_at(idx); 3290 } 3291 3292 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3293 return ptypes(mt)->length(); 3294 } 3295 3296 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3297 objArrayOop pts = ptypes(mt); 3298 int count = pts->length(); 3299 int slots = 0; 3300 for (int i = 0; i < count; i++) { 3301 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3302 slots += type2size[bt]; 3303 } 3304 return slots; 3305 } 3306 3307 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3308 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3309 return type2size[bt]; 3310 } 3311 3312 3313 // Support for java_lang_invoke_CallSite 3314 3315 int java_lang_invoke_CallSite::_target_offset; 3316 int java_lang_invoke_CallSite::_context_offset; 3317 3318 void java_lang_invoke_CallSite::compute_offsets() { 3319 Klass* k = SystemDictionary::CallSite_klass(); 3320 if (k != NULL) { 3321 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3322 compute_offset(_context_offset, k, vmSymbols::context_name(), 3323 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3324 } 3325 } 3326 3327 oop java_lang_invoke_CallSite::context(oop call_site) { 3328 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3329 3330 oop dep_oop = call_site->obj_field(_context_offset); 3331 return dep_oop; 3332 } 3333 3334 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3335 3336 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3337 3338 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3339 Klass* k = SystemDictionary::Context_klass(); 3340 if (k != NULL) { 3341 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3342 } 3343 } 3344 3345 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3346 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3347 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3348 DependencyContext dep_ctx(vmdeps_addr); 3349 return dep_ctx; 3350 } 3351 3352 // Support for java_security_AccessControlContext 3353 3354 int java_security_AccessControlContext::_context_offset = 0; 3355 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3356 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3357 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3358 3359 void java_security_AccessControlContext::compute_offsets() { 3360 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3361 fieldDescriptor fd; 3362 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3363 3364 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3365 fatal("Invalid layout of java.security.AccessControlContext"); 3366 } 3367 _context_offset = fd.offset(); 3368 3369 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3370 fatal("Invalid layout of java.security.AccessControlContext"); 3371 } 3372 _privilegedContext_offset = fd.offset(); 3373 3374 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3375 fatal("Invalid layout of java.security.AccessControlContext"); 3376 } 3377 _isPrivileged_offset = fd.offset(); 3378 3379 // The offset may not be present for bootstrapping with older JDK. 3380 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3381 _isAuthorized_offset = fd.offset(); 3382 } 3383 } 3384 3385 3386 bool java_security_AccessControlContext::is_authorized(Handle context) { 3387 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3388 assert(_isAuthorized_offset != -1, "should be set"); 3389 return context->bool_field(_isAuthorized_offset) != 0; 3390 } 3391 3392 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3393 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3394 // Ensure klass is initialized 3395 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3396 // Allocate result 3397 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3398 // Fill in values 3399 result->obj_field_put(_context_offset, context()); 3400 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3401 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3402 // whitelist AccessControlContexts created by the JVM if present 3403 if (_isAuthorized_offset != -1) { 3404 result->bool_field_put(_isAuthorized_offset, true); 3405 } 3406 return result; 3407 } 3408 3409 3410 // Support for java_lang_ClassLoader 3411 3412 bool java_lang_ClassLoader::offsets_computed = false; 3413 int java_lang_ClassLoader::_loader_data_offset = -1; 3414 int java_lang_ClassLoader::parallelCapable_offset = -1; 3415 int java_lang_ClassLoader::unnamedModule_offset = -1; 3416 3417 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3418 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3419 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3420 } 3421 3422 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3423 return *java_lang_ClassLoader::loader_data_addr(loader); 3424 } 3425 3426 void java_lang_ClassLoader::compute_offsets() { 3427 assert(!offsets_computed, "offsets should be initialized only once"); 3428 offsets_computed = true; 3429 3430 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3431 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3432 compute_optional_offset(parallelCapable_offset, 3433 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3434 3435 compute_offset(unnamedModule_offset, 3436 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3437 3438 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3439 } 3440 3441 oop java_lang_ClassLoader::parent(oop loader) { 3442 assert(is_instance(loader), "loader must be oop"); 3443 return loader->obj_field(parent_offset); 3444 } 3445 3446 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3447 assert(is_instance(loader), "loader must be oop"); 3448 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3449 oop acl = loader; 3450 debug_only(jint loop_count = 0); 3451 // This loop taken verbatim from ClassLoader.java: 3452 do { 3453 acl = parent(acl); 3454 if (cl == acl) { 3455 return true; 3456 } 3457 assert(++loop_count > 0, "loop_count overflow"); 3458 } while (acl != NULL); 3459 return false; 3460 } 3461 3462 bool java_lang_ClassLoader::is_instance(oop obj) { 3463 return obj != NULL && is_subclass(obj->klass()); 3464 } 3465 3466 3467 // For class loader classes, parallelCapable defined 3468 // based on non-null field 3469 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3470 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3471 if (parallelCapable_offset == -1) { 3472 // Default for backward compatibility is false 3473 return false; 3474 } 3475 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3476 } 3477 3478 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3479 // Fix for 4474172; see evaluation for more details 3480 loader = non_reflection_class_loader(loader); 3481 3482 oop cl = SystemDictionary::java_system_loader(); 3483 while(cl != NULL) { 3484 if (cl == loader) return true; 3485 cl = parent(cl); 3486 } 3487 return false; 3488 } 3489 3490 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3491 if (loader != NULL) { 3492 // See whether this is one of the class loaders associated with 3493 // the generated bytecodes for reflection, and if so, "magically" 3494 // delegate to its parent to prevent class loading from occurring 3495 // in places where applications using reflection didn't expect it. 3496 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3497 // This might be null in non-1.4 JDKs 3498 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3499 return parent(loader); 3500 } 3501 } 3502 return loader; 3503 } 3504 3505 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3506 assert(is_instance(loader), "loader must be oop"); 3507 return loader->obj_field(unnamedModule_offset); 3508 } 3509 3510 // Support for java_lang_System 3511 int java_lang_System::in_offset_in_bytes() { 3512 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3513 } 3514 3515 3516 int java_lang_System::out_offset_in_bytes() { 3517 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3518 } 3519 3520 3521 int java_lang_System::err_offset_in_bytes() { 3522 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3523 } 3524 3525 3526 bool java_lang_System::has_security_manager() { 3527 InstanceKlass* ik = SystemDictionary::System_klass(); 3528 address addr = ik->static_field_addr(static_security_offset); 3529 if (UseCompressedOops) { 3530 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3531 } else { 3532 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3533 } 3534 } 3535 3536 int java_lang_Class::_klass_offset; 3537 int java_lang_Class::_array_klass_offset; 3538 int java_lang_Class::_oop_size_offset; 3539 int java_lang_Class::_static_oop_field_count_offset; 3540 int java_lang_Class::_class_loader_offset; 3541 int java_lang_Class::_module_offset; 3542 int java_lang_Class::_protection_domain_offset; 3543 int java_lang_Class::_component_mirror_offset; 3544 int java_lang_Class::_init_lock_offset; 3545 int java_lang_Class::_signers_offset; 3546 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3547 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3548 int java_lang_Throwable::backtrace_offset; 3549 int java_lang_Throwable::detailMessage_offset; 3550 int java_lang_Throwable::stackTrace_offset; 3551 int java_lang_Throwable::depth_offset; 3552 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3553 int java_lang_reflect_AccessibleObject::override_offset; 3554 int java_lang_reflect_Method::clazz_offset; 3555 int java_lang_reflect_Method::name_offset; 3556 int java_lang_reflect_Method::returnType_offset; 3557 int java_lang_reflect_Method::parameterTypes_offset; 3558 int java_lang_reflect_Method::exceptionTypes_offset; 3559 int java_lang_reflect_Method::slot_offset; 3560 int java_lang_reflect_Method::modifiers_offset; 3561 int java_lang_reflect_Method::signature_offset; 3562 int java_lang_reflect_Method::annotations_offset; 3563 int java_lang_reflect_Method::parameter_annotations_offset; 3564 int java_lang_reflect_Method::annotation_default_offset; 3565 int java_lang_reflect_Method::type_annotations_offset; 3566 int java_lang_reflect_Constructor::clazz_offset; 3567 int java_lang_reflect_Constructor::parameterTypes_offset; 3568 int java_lang_reflect_Constructor::exceptionTypes_offset; 3569 int java_lang_reflect_Constructor::slot_offset; 3570 int java_lang_reflect_Constructor::modifiers_offset; 3571 int java_lang_reflect_Constructor::signature_offset; 3572 int java_lang_reflect_Constructor::annotations_offset; 3573 int java_lang_reflect_Constructor::parameter_annotations_offset; 3574 int java_lang_reflect_Constructor::type_annotations_offset; 3575 int java_lang_reflect_Field::clazz_offset; 3576 int java_lang_reflect_Field::name_offset; 3577 int java_lang_reflect_Field::type_offset; 3578 int java_lang_reflect_Field::slot_offset; 3579 int java_lang_reflect_Field::modifiers_offset; 3580 int java_lang_reflect_Field::signature_offset; 3581 int java_lang_reflect_Field::annotations_offset; 3582 int java_lang_reflect_Field::type_annotations_offset; 3583 int java_lang_reflect_Parameter::name_offset; 3584 int java_lang_reflect_Parameter::modifiers_offset; 3585 int java_lang_reflect_Parameter::index_offset; 3586 int java_lang_reflect_Parameter::executable_offset; 3587 int java_lang_boxing_object::value_offset; 3588 int java_lang_boxing_object::long_value_offset; 3589 int java_lang_ref_Reference::referent_offset; 3590 int java_lang_ref_Reference::queue_offset; 3591 int java_lang_ref_Reference::next_offset; 3592 int java_lang_ref_Reference::discovered_offset; 3593 int java_lang_ref_Reference::number_of_fake_oop_fields; 3594 int java_lang_ref_SoftReference::timestamp_offset; 3595 int java_lang_ref_SoftReference::static_clock_offset; 3596 int java_lang_ClassLoader::parent_offset; 3597 int java_lang_System::static_in_offset; 3598 int java_lang_System::static_out_offset; 3599 int java_lang_System::static_err_offset; 3600 int java_lang_System::static_security_offset; 3601 int java_lang_StackTraceElement::declaringClass_offset; 3602 int java_lang_StackTraceElement::methodName_offset; 3603 int java_lang_StackTraceElement::fileName_offset; 3604 int java_lang_StackTraceElement::lineNumber_offset; 3605 int java_lang_StackTraceElement::moduleName_offset; 3606 int java_lang_StackTraceElement::moduleVersion_offset; 3607 int java_lang_StackFrameInfo::_declaringClass_offset; 3608 int java_lang_StackFrameInfo::_memberName_offset; 3609 int java_lang_StackFrameInfo::_bci_offset; 3610 int java_lang_StackFrameInfo::_version_offset; 3611 int java_lang_LiveStackFrameInfo::_monitors_offset; 3612 int java_lang_LiveStackFrameInfo::_locals_offset; 3613 int java_lang_LiveStackFrameInfo::_operands_offset; 3614 int java_lang_AssertionStatusDirectives::classes_offset; 3615 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3616 int java_lang_AssertionStatusDirectives::packages_offset; 3617 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3618 int java_lang_AssertionStatusDirectives::deflt_offset; 3619 int java_nio_Buffer::_limit_offset; 3620 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3621 int reflect_ConstantPool::_oop_offset; 3622 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3623 3624 3625 // Support for java_lang_StackTraceElement 3626 3627 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3628 element->obj_field_put(fileName_offset, value); 3629 } 3630 3631 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3632 element->obj_field_put(declaringClass_offset, value); 3633 } 3634 3635 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3636 element->obj_field_put(methodName_offset, value); 3637 } 3638 3639 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3640 element->int_field_put(lineNumber_offset, value); 3641 } 3642 3643 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3644 element->obj_field_put(moduleName_offset, value); 3645 } 3646 3647 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3648 element->obj_field_put(moduleVersion_offset, value); 3649 } 3650 3651 // Support for java_lang_StackFrameInfo 3652 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3653 element->obj_field_put(_declaringClass_offset, value); 3654 } 3655 3656 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3657 element->short_field_put(_version_offset, value); 3658 } 3659 3660 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3661 element->int_field_put(_bci_offset, value); 3662 } 3663 3664 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3665 element->obj_field_put(_monitors_offset, value); 3666 } 3667 3668 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3669 element->obj_field_put(_locals_offset, value); 3670 } 3671 3672 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3673 element->obj_field_put(_operands_offset, value); 3674 } 3675 3676 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3677 3678 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3679 o->obj_field_put(classes_offset, val); 3680 } 3681 3682 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3683 o->obj_field_put(classEnabled_offset, val); 3684 } 3685 3686 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3687 o->obj_field_put(packages_offset, val); 3688 } 3689 3690 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3691 o->obj_field_put(packageEnabled_offset, val); 3692 } 3693 3694 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3695 o->bool_field_put(deflt_offset, val); 3696 } 3697 3698 3699 // Support for intrinsification of java.nio.Buffer.checkIndex 3700 int java_nio_Buffer::limit_offset() { 3701 return _limit_offset; 3702 } 3703 3704 3705 void java_nio_Buffer::compute_offsets() { 3706 Klass* k = SystemDictionary::nio_Buffer_klass(); 3707 assert(k != NULL, "must be loaded in 1.4+"); 3708 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3709 } 3710 3711 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3712 if (_owner_offset != 0) return; 3713 3714 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3715 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3716 compute_offset(_owner_offset, k, 3717 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3718 } 3719 3720 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3721 assert(_owner_offset != 0, "Must be initialized"); 3722 return obj->obj_field(_owner_offset); 3723 } 3724 3725 // Compute hard-coded offsets 3726 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3727 // are not available to determine the offset_of_static_fields. 3728 void JavaClasses::compute_hard_coded_offsets() { 3729 const int x = heapOopSize; 3730 const int header = instanceOopDesc::base_offset_in_bytes(); 3731 3732 // Throwable Class 3733 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3734 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3735 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3736 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3737 3738 // java_lang_boxing_object 3739 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3740 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3741 3742 // java_lang_ref_Reference: 3743 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3744 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3745 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3746 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3747 // Artificial fields for java_lang_ref_Reference 3748 // The first field is for the discovered field added in 1.4 3749 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3750 3751 // java_lang_ref_SoftReference Class 3752 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3753 // Don't multiply static fields because they are always in wordSize units 3754 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3755 3756 // java_lang_ClassLoader 3757 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3758 3759 // java_lang_System 3760 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3761 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3762 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3763 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3764 3765 // java_lang_StackTraceElement 3766 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3767 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3768 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3769 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3770 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3771 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3772 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3773 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3774 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3775 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3776 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3777 3778 } 3779 3780 3781 // Compute non-hard-coded field offsets of all the classes in this file 3782 void JavaClasses::compute_offsets() { 3783 // java_lang_Class::compute_offsets was called earlier in bootstrap 3784 java_lang_ClassLoader::compute_offsets(); 3785 java_lang_Throwable::compute_offsets(); 3786 java_lang_Thread::compute_offsets(); 3787 java_lang_ThreadGroup::compute_offsets(); 3788 java_lang_invoke_MethodHandle::compute_offsets(); 3789 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3790 java_lang_invoke_MemberName::compute_offsets(); 3791 java_lang_invoke_LambdaForm::compute_offsets(); 3792 java_lang_invoke_MethodType::compute_offsets(); 3793 java_lang_invoke_CallSite::compute_offsets(); 3794 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3795 java_security_AccessControlContext::compute_offsets(); 3796 // Initialize reflection classes. The layouts of these classes 3797 // changed with the new reflection implementation in JDK 1.4, and 3798 // since the Universe doesn't know what JDK version it is until this 3799 // point we defer computation of these offsets until now. 3800 java_lang_reflect_AccessibleObject::compute_offsets(); 3801 java_lang_reflect_Method::compute_offsets(); 3802 java_lang_reflect_Constructor::compute_offsets(); 3803 java_lang_reflect_Field::compute_offsets(); 3804 java_nio_Buffer::compute_offsets(); 3805 reflect_ConstantPool::compute_offsets(); 3806 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3807 java_lang_reflect_Parameter::compute_offsets(); 3808 java_lang_reflect_Module::compute_offsets(); 3809 java_lang_StackFrameInfo::compute_offsets(); 3810 java_lang_LiveStackFrameInfo::compute_offsets(); 3811 3812 // generated interpreter code wants to know about the offsets we just computed: 3813 AbstractAssembler::update_delayed_values(); 3814 } 3815 3816 #ifndef PRODUCT 3817 3818 // These functions exist to assert the validity of hard-coded field offsets to guard 3819 // against changes in the class files 3820 3821 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3822 EXCEPTION_MARK; 3823 fieldDescriptor fd; 3824 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3825 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3826 instanceKlassHandle h_klass (THREAD, k); 3827 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3828 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3829 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3830 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3831 return false; 3832 } 3833 if (fd.is_static()) { 3834 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3835 return false; 3836 } 3837 if (fd.offset() == hardcoded_offset ) { 3838 return true; 3839 } else { 3840 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3841 klass_name, field_name, hardcoded_offset, fd.offset()); 3842 return false; 3843 } 3844 } 3845 3846 3847 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3848 EXCEPTION_MARK; 3849 fieldDescriptor fd; 3850 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3851 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3852 instanceKlassHandle h_klass (THREAD, k); 3853 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3854 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3855 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3856 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3857 return false; 3858 } 3859 if (!fd.is_static()) { 3860 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3861 return false; 3862 } 3863 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3864 return true; 3865 } else { 3866 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()); 3867 return false; 3868 } 3869 } 3870 3871 3872 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3873 EXCEPTION_MARK; 3874 fieldDescriptor fd; 3875 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3876 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3877 instanceKlassHandle h_klass (THREAD, k); 3878 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3879 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3880 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3881 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3882 return false; 3883 } 3884 if (!fd.is_static() || !fd.has_initial_value()) { 3885 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3886 return false; 3887 } 3888 if (!fd.initial_value_tag().is_int()) { 3889 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3890 return false; 3891 } 3892 jint field_value = fd.int_initial_value(); 3893 if (field_value == hardcoded_constant) { 3894 return true; 3895 } else { 3896 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); 3897 return false; 3898 } 3899 } 3900 3901 3902 // Check the hard-coded field offsets of all the classes in this file 3903 3904 void JavaClasses::check_offsets() { 3905 bool valid = true; 3906 HandleMark hm; 3907 3908 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3909 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3910 3911 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3912 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3913 3914 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3915 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3916 3917 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3918 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3919 3920 // java.lang.String 3921 3922 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3923 if (java_lang_String::has_hash_field()) { 3924 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3925 } 3926 if (java_lang_String::has_coder_field()) { 3927 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3928 } 3929 3930 // java.lang.Class 3931 3932 // Fake fields 3933 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3934 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3935 3936 // java.lang.Throwable 3937 3938 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3939 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3940 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3941 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 3942 3943 // Boxed primitive objects (java_lang_boxing_object) 3944 3945 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3946 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3947 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3948 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3949 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3950 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3951 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3952 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3953 3954 // java.lang.ClassLoader 3955 3956 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3957 3958 // java.lang.System 3959 3960 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3961 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3962 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3963 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3964 3965 // java.lang.StackTraceElement 3966 3967 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3968 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3969 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3970 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3971 3972 // java.lang.ref.Reference 3973 3974 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3975 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3976 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3977 // Fake field 3978 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3979 3980 // java.lang.ref.SoftReference 3981 3982 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3983 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3984 3985 // java.lang.AssertionStatusDirectives 3986 // 3987 // The CheckAssertionStatusDirectives boolean can be removed from here and 3988 // globals.hpp after the AssertionStatusDirectives class has been integrated 3989 // into merlin "for some time." Without it, the vm will fail with early 3990 // merlin builds. 3991 3992 if (CheckAssertionStatusDirectives) { 3993 const char* nm = "java/lang/AssertionStatusDirectives"; 3994 const char* sig = "[Ljava/lang/String;"; 3995 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3996 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3997 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3998 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3999 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4000 } 4001 4002 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4003 } 4004 4005 #endif // PRODUCT 4006 4007 int InjectedField::compute_offset() { 4008 InstanceKlass* ik = InstanceKlass::cast(klass()); 4009 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4010 if (!may_be_java && !fs.access_flags().is_internal()) { 4011 // Only look at injected fields 4012 continue; 4013 } 4014 if (fs.name() == name() && fs.signature() == signature()) { 4015 return fs.offset(); 4016 } 4017 } 4018 ResourceMark rm; 4019 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)" : ""); 4020 #ifndef PRODUCT 4021 ik->print(); 4022 tty->print_cr("all fields:"); 4023 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4024 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4025 } 4026 #endif //PRODUCT 4027 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4028 return -1; 4029 } 4030 4031 void javaClasses_init() { 4032 JavaClasses::compute_offsets(); 4033 JavaClasses::check_offsets(); 4034 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4035 }