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 return java_class->int_field(_oop_size_offset); 875 } 876 void java_lang_Class::set_oop_size(oop java_class, int size) { 877 assert(_oop_size_offset != 0, "must be set"); 878 java_class->int_field_put(_oop_size_offset, size); 879 } 880 int java_lang_Class::static_oop_field_count(oop java_class) { 881 assert(_static_oop_field_count_offset != 0, "must be set"); 882 return java_class->int_field(_static_oop_field_count_offset); 883 } 884 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 885 assert(_static_oop_field_count_offset != 0, "must be set"); 886 java_class->int_field_put(_static_oop_field_count_offset, size); 887 } 888 889 oop java_lang_Class::protection_domain(oop java_class) { 890 assert(_protection_domain_offset != 0, "must be set"); 891 return java_class->obj_field(_protection_domain_offset); 892 } 893 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 894 assert(_protection_domain_offset != 0, "must be set"); 895 java_class->obj_field_put(_protection_domain_offset, pd); 896 } 897 898 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 899 assert(_component_mirror_offset != 0, "must be set"); 900 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 901 } 902 oop java_lang_Class::component_mirror(oop java_class) { 903 assert(_component_mirror_offset != 0, "must be set"); 904 return java_class->obj_field(_component_mirror_offset); 905 } 906 907 oop java_lang_Class::init_lock(oop java_class) { 908 assert(_init_lock_offset != 0, "must be set"); 909 return java_class->obj_field(_init_lock_offset); 910 } 911 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 912 assert(_init_lock_offset != 0, "must be set"); 913 java_class->obj_field_put(_init_lock_offset, init_lock); 914 } 915 916 objArrayOop java_lang_Class::signers(oop java_class) { 917 assert(_signers_offset != 0, "must be set"); 918 return (objArrayOop)java_class->obj_field(_signers_offset); 919 } 920 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 921 assert(_signers_offset != 0, "must be set"); 922 java_class->obj_field_put(_signers_offset, (oop)signers); 923 } 924 925 926 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 927 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 928 if (_class_loader_offset != 0) { 929 java_class->obj_field_put(_class_loader_offset, loader); 930 } 931 } 932 933 oop java_lang_Class::class_loader(oop java_class) { 934 assert(_class_loader_offset != 0, "must be set"); 935 return java_class->obj_field(_class_loader_offset); 936 } 937 938 oop java_lang_Class::module(oop java_class) { 939 assert(_module_offset != 0, "must be set"); 940 return java_class->obj_field(_module_offset); 941 } 942 943 void java_lang_Class::set_module(oop java_class, oop module) { 944 assert(_module_offset != 0, "must be set"); 945 java_class->obj_field_put(_module_offset, module); 946 } 947 948 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 949 // This should be improved by adding a field at the Java level or by 950 // introducing a new VM klass (see comment in ClassFileParser) 951 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 952 if (type != T_VOID) { 953 Klass* aklass = Universe::typeArrayKlassObj(type); 954 assert(aklass != NULL, "correct bootstrap"); 955 set_array_klass(java_class, aklass); 956 } 957 #ifdef ASSERT 958 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 959 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 960 #endif 961 return java_class; 962 } 963 964 965 Klass* java_lang_Class::as_Klass(oop java_class) { 966 //%note memory_2 967 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 968 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 969 assert(k == NULL || k->is_klass(), "type check"); 970 return k; 971 } 972 973 974 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 975 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 976 java_class->metadata_field_put(_klass_offset, klass); 977 } 978 979 980 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 981 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 982 Symbol* name = NULL; 983 bool is_instance = false; 984 if (is_primitive(java_class)) { 985 name = vmSymbols::type_signature(primitive_type(java_class)); 986 } else { 987 Klass* k = as_Klass(java_class); 988 is_instance = k->is_instance_klass(); 989 name = k->name(); 990 } 991 if (name == NULL) { 992 st->print("<null>"); 993 return; 994 } 995 if (is_instance) st->print("L"); 996 st->write((char*) name->base(), (int) name->utf8_length()); 997 if (is_instance) st->print(";"); 998 } 999 1000 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1001 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1002 Symbol* name; 1003 if (is_primitive(java_class)) { 1004 name = vmSymbols::type_signature(primitive_type(java_class)); 1005 // Because this can create a new symbol, the caller has to decrement 1006 // the refcount, so make adjustment here and below for symbols returned 1007 // that are not created or incremented due to a successful lookup. 1008 name->increment_refcount(); 1009 } else { 1010 Klass* k = as_Klass(java_class); 1011 if (!k->is_instance_klass()) { 1012 name = k->name(); 1013 name->increment_refcount(); 1014 } else { 1015 ResourceMark rm; 1016 const char* sigstr = k->signature_name(); 1017 int siglen = (int) strlen(sigstr); 1018 if (!intern_if_not_found) { 1019 name = SymbolTable::probe(sigstr, siglen); 1020 } else { 1021 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1022 } 1023 } 1024 } 1025 return name; 1026 } 1027 1028 // Returns the Java name for this Java mirror (Resource allocated) 1029 // See Klass::external_name(). 1030 // For primitive type Java mirrors, its type name is returned. 1031 const char* java_lang_Class::as_external_name(oop java_class) { 1032 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1033 const char* name = NULL; 1034 if (is_primitive(java_class)) { 1035 name = type2name(primitive_type(java_class)); 1036 } else { 1037 name = as_Klass(java_class)->external_name(); 1038 } 1039 if (name == NULL) { 1040 name = "<null>"; 1041 } 1042 return name; 1043 } 1044 1045 Klass* java_lang_Class::array_klass(oop java_class) { 1046 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1047 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1048 return k; 1049 } 1050 1051 1052 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1053 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1054 java_class->metadata_field_put(_array_klass_offset, klass); 1055 } 1056 1057 1058 bool java_lang_Class::is_primitive(oop java_class) { 1059 // should assert: 1060 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1061 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1062 1063 #ifdef ASSERT 1064 if (is_primitive) { 1065 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1066 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1067 "Should be either the T_VOID primitive or a java primitive"); 1068 } 1069 #endif 1070 1071 return is_primitive; 1072 } 1073 1074 1075 BasicType java_lang_Class::primitive_type(oop java_class) { 1076 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1077 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1078 BasicType type = T_VOID; 1079 if (ak != NULL) { 1080 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1081 type = ArrayKlass::cast(ak)->element_type(); 1082 } else { 1083 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1084 } 1085 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1086 return type; 1087 } 1088 1089 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1090 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1091 if (is_primitive(java_class)) { 1092 if (reference_klass != NULL) 1093 (*reference_klass) = NULL; 1094 return primitive_type(java_class); 1095 } else { 1096 if (reference_klass != NULL) 1097 (*reference_klass) = as_Klass(java_class); 1098 return T_OBJECT; 1099 } 1100 } 1101 1102 1103 oop java_lang_Class::primitive_mirror(BasicType t) { 1104 oop mirror = Universe::java_mirror(t); 1105 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1106 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1107 return mirror; 1108 } 1109 1110 bool java_lang_Class::offsets_computed = false; 1111 int java_lang_Class::classRedefinedCount_offset = -1; 1112 1113 void java_lang_Class::compute_offsets() { 1114 assert(!offsets_computed, "offsets should be initialized only once"); 1115 offsets_computed = true; 1116 1117 Klass* k = SystemDictionary::Class_klass(); 1118 // The classRedefinedCount field is only present starting in 1.5, 1119 // so don't go fatal. 1120 compute_optional_offset(classRedefinedCount_offset, 1121 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1122 1123 // Needs to be optional because the old build runs Queens during bootstrapping 1124 // and jdk8-9 doesn't have coordinated pushes yet. 1125 compute_optional_offset(_class_loader_offset, 1126 k, vmSymbols::classLoader_name(), 1127 vmSymbols::classloader_signature()); 1128 1129 compute_offset(_component_mirror_offset, 1130 k, vmSymbols::componentType_name(), 1131 vmSymbols::class_signature()); 1132 1133 compute_offset(_module_offset, 1134 k, vmSymbols::module_name(), 1135 vmSymbols::module_signature()); 1136 1137 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1138 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1139 // GC treats them the same. 1140 _init_lock_offset = _component_mirror_offset; 1141 1142 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1143 } 1144 1145 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1146 if (classRedefinedCount_offset == -1) { 1147 // If we don't have an offset for it then just return -1 as a marker. 1148 return -1; 1149 } 1150 1151 return the_class_mirror->int_field(classRedefinedCount_offset); 1152 } 1153 1154 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1155 if (classRedefinedCount_offset == -1) { 1156 // If we don't have an offset for it then nothing to set. 1157 return; 1158 } 1159 1160 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1161 } 1162 1163 1164 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1165 // platform thread structure, and a eetop offset which was used for thread 1166 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1167 // merged, so in the HotSpot VM we just use the eetop field for the thread 1168 // instead of the privateInfo_offset. 1169 // 1170 // Note: The stackSize field is only present starting in 1.4. 1171 1172 int java_lang_Thread::_name_offset = 0; 1173 int java_lang_Thread::_group_offset = 0; 1174 int java_lang_Thread::_contextClassLoader_offset = 0; 1175 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1176 int java_lang_Thread::_priority_offset = 0; 1177 int java_lang_Thread::_eetop_offset = 0; 1178 int java_lang_Thread::_daemon_offset = 0; 1179 int java_lang_Thread::_stillborn_offset = 0; 1180 int java_lang_Thread::_stackSize_offset = 0; 1181 int java_lang_Thread::_tid_offset = 0; 1182 int java_lang_Thread::_thread_status_offset = 0; 1183 int java_lang_Thread::_park_blocker_offset = 0; 1184 int java_lang_Thread::_park_event_offset = 0 ; 1185 1186 1187 void java_lang_Thread::compute_offsets() { 1188 assert(_group_offset == 0, "offsets should be initialized only once"); 1189 1190 Klass* k = SystemDictionary::Thread_klass(); 1191 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1192 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1193 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1194 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1195 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1196 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1197 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1198 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1199 // The stackSize field is only present starting in 1.4, so don't go fatal. 1200 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1201 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1202 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1203 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1204 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1205 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1206 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1207 vmSymbols::long_signature()); 1208 } 1209 1210 1211 JavaThread* java_lang_Thread::thread(oop java_thread) { 1212 return (JavaThread*)java_thread->address_field(_eetop_offset); 1213 } 1214 1215 1216 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1217 java_thread->address_field_put(_eetop_offset, (address)thread); 1218 } 1219 1220 1221 oop java_lang_Thread::name(oop java_thread) { 1222 return java_thread->obj_field(_name_offset); 1223 } 1224 1225 1226 void java_lang_Thread::set_name(oop java_thread, oop name) { 1227 java_thread->obj_field_put(_name_offset, name); 1228 } 1229 1230 1231 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1232 return (ThreadPriority)java_thread->int_field(_priority_offset); 1233 } 1234 1235 1236 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1237 java_thread->int_field_put(_priority_offset, priority); 1238 } 1239 1240 1241 oop java_lang_Thread::threadGroup(oop java_thread) { 1242 return java_thread->obj_field(_group_offset); 1243 } 1244 1245 1246 bool java_lang_Thread::is_stillborn(oop java_thread) { 1247 return java_thread->bool_field(_stillborn_offset) != 0; 1248 } 1249 1250 1251 // We never have reason to turn the stillborn bit off 1252 void java_lang_Thread::set_stillborn(oop java_thread) { 1253 java_thread->bool_field_put(_stillborn_offset, true); 1254 } 1255 1256 1257 bool java_lang_Thread::is_alive(oop java_thread) { 1258 JavaThread* thr = java_lang_Thread::thread(java_thread); 1259 return (thr != NULL); 1260 } 1261 1262 1263 bool java_lang_Thread::is_daemon(oop java_thread) { 1264 return java_thread->bool_field(_daemon_offset) != 0; 1265 } 1266 1267 1268 void java_lang_Thread::set_daemon(oop java_thread) { 1269 java_thread->bool_field_put(_daemon_offset, true); 1270 } 1271 1272 oop java_lang_Thread::context_class_loader(oop java_thread) { 1273 return java_thread->obj_field(_contextClassLoader_offset); 1274 } 1275 1276 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1277 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1278 } 1279 1280 1281 jlong java_lang_Thread::stackSize(oop java_thread) { 1282 if (_stackSize_offset > 0) { 1283 return java_thread->long_field(_stackSize_offset); 1284 } else { 1285 return 0; 1286 } 1287 } 1288 1289 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1290 void java_lang_Thread::set_thread_status(oop java_thread, 1291 java_lang_Thread::ThreadStatus status) { 1292 // The threadStatus is only present starting in 1.5 1293 if (_thread_status_offset > 0) { 1294 java_thread->int_field_put(_thread_status_offset, status); 1295 } 1296 } 1297 1298 // Read thread status value from threadStatus field in java.lang.Thread java class. 1299 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1300 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1301 JavaThread::current()->thread_state() == _thread_in_vm, 1302 "Java Thread is not running in vm"); 1303 // The threadStatus is only present starting in 1.5 1304 if (_thread_status_offset > 0) { 1305 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1306 } else { 1307 // All we can easily figure out is if it is alive, but that is 1308 // enough info for a valid unknown status. 1309 // These aren't restricted to valid set ThreadStatus values, so 1310 // use JVMTI values and cast. 1311 JavaThread* thr = java_lang_Thread::thread(java_thread); 1312 if (thr == NULL) { 1313 // the thread hasn't run yet or is in the process of exiting 1314 return NEW; 1315 } 1316 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1317 } 1318 } 1319 1320 1321 jlong java_lang_Thread::thread_id(oop java_thread) { 1322 // The thread ID field is only present starting in 1.5 1323 if (_tid_offset > 0) { 1324 return java_thread->long_field(_tid_offset); 1325 } else { 1326 return 0; 1327 } 1328 } 1329 1330 oop java_lang_Thread::park_blocker(oop java_thread) { 1331 assert(JDK_Version::current().supports_thread_park_blocker() && 1332 _park_blocker_offset != 0, "Must support parkBlocker field"); 1333 1334 if (_park_blocker_offset > 0) { 1335 return java_thread->obj_field(_park_blocker_offset); 1336 } 1337 1338 return NULL; 1339 } 1340 1341 jlong java_lang_Thread::park_event(oop java_thread) { 1342 if (_park_event_offset > 0) { 1343 return java_thread->long_field(_park_event_offset); 1344 } 1345 return 0; 1346 } 1347 1348 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1349 if (_park_event_offset > 0) { 1350 java_thread->long_field_put(_park_event_offset, ptr); 1351 return true; 1352 } 1353 return false; 1354 } 1355 1356 1357 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1358 assert(_thread_status_offset != 0, "Must have thread status"); 1359 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1360 switch (status) { 1361 case NEW : return "NEW"; 1362 case RUNNABLE : return "RUNNABLE"; 1363 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1364 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1365 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1366 case PARKED : return "WAITING (parking)"; 1367 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1368 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1369 case TERMINATED : return "TERMINATED"; 1370 default : return "UNKNOWN"; 1371 }; 1372 } 1373 int java_lang_ThreadGroup::_parent_offset = 0; 1374 int java_lang_ThreadGroup::_name_offset = 0; 1375 int java_lang_ThreadGroup::_threads_offset = 0; 1376 int java_lang_ThreadGroup::_groups_offset = 0; 1377 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1378 int java_lang_ThreadGroup::_destroyed_offset = 0; 1379 int java_lang_ThreadGroup::_daemon_offset = 0; 1380 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1381 int java_lang_ThreadGroup::_nthreads_offset = 0; 1382 int java_lang_ThreadGroup::_ngroups_offset = 0; 1383 1384 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1385 assert(java_thread_group->is_oop(), "thread group must be oop"); 1386 return java_thread_group->obj_field(_parent_offset); 1387 } 1388 1389 // ("name as oop" accessor is not necessary) 1390 1391 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1392 oop name = java_thread_group->obj_field(_name_offset); 1393 // ThreadGroup.name can be null 1394 if (name != NULL) { 1395 return java_lang_String::as_utf8_string(name); 1396 } 1397 return NULL; 1398 } 1399 1400 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1401 assert(java_thread_group->is_oop(), "thread group must be oop"); 1402 return java_thread_group->int_field(_nthreads_offset); 1403 } 1404 1405 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1406 oop threads = java_thread_group->obj_field(_threads_offset); 1407 assert(threads != NULL, "threadgroups should have threads"); 1408 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1409 return objArrayOop(threads); 1410 } 1411 1412 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1413 assert(java_thread_group->is_oop(), "thread group must be oop"); 1414 return java_thread_group->int_field(_ngroups_offset); 1415 } 1416 1417 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1418 oop groups = java_thread_group->obj_field(_groups_offset); 1419 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1420 return objArrayOop(groups); 1421 } 1422 1423 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1424 assert(java_thread_group->is_oop(), "thread group must be oop"); 1425 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1426 } 1427 1428 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1429 assert(java_thread_group->is_oop(), "thread group must be oop"); 1430 return java_thread_group->bool_field(_destroyed_offset) != 0; 1431 } 1432 1433 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1434 assert(java_thread_group->is_oop(), "thread group must be oop"); 1435 return java_thread_group->bool_field(_daemon_offset) != 0; 1436 } 1437 1438 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1439 assert(java_thread_group->is_oop(), "thread group must be oop"); 1440 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1441 } 1442 1443 void java_lang_ThreadGroup::compute_offsets() { 1444 assert(_parent_offset == 0, "offsets should be initialized only once"); 1445 1446 Klass* k = SystemDictionary::ThreadGroup_klass(); 1447 1448 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1449 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1450 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1451 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1452 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1453 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1454 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1455 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1456 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1457 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1458 } 1459 1460 1461 void java_lang_Throwable::compute_offsets() { 1462 Klass* k = SystemDictionary::Throwable_klass(); 1463 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1464 } 1465 1466 oop java_lang_Throwable::unassigned_stacktrace() { 1467 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1468 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1469 if (UseCompressedOops) { 1470 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1471 } else { 1472 return oopDesc::load_decode_heap_oop((oop*)addr); 1473 } 1474 } 1475 1476 oop java_lang_Throwable::backtrace(oop throwable) { 1477 return throwable->obj_field_acquire(backtrace_offset); 1478 } 1479 1480 1481 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1482 throwable->release_obj_field_put(backtrace_offset, value); 1483 } 1484 1485 int java_lang_Throwable::depth(oop throwable) { 1486 return throwable->int_field(depth_offset); 1487 } 1488 1489 void java_lang_Throwable::set_depth(oop throwable, int value) { 1490 throwable->int_field_put(depth_offset, value); 1491 } 1492 1493 oop java_lang_Throwable::message(Handle throwable) { 1494 return throwable->obj_field(detailMessage_offset); 1495 } 1496 1497 1498 // Return Symbol for detailed_message or NULL 1499 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1500 PRESERVE_EXCEPTION_MARK; // Keep original exception 1501 oop detailed_message = java_lang_Throwable::message(throwable); 1502 if (detailed_message != NULL) { 1503 return java_lang_String::as_symbol(detailed_message, THREAD); 1504 } 1505 return NULL; 1506 } 1507 1508 void java_lang_Throwable::set_message(oop throwable, oop value) { 1509 throwable->obj_field_put(detailMessage_offset, value); 1510 } 1511 1512 1513 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1514 throwable->obj_field_put(stackTrace_offset, st_element_array); 1515 } 1516 1517 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1518 set_stacktrace(throwable, NULL); 1519 } 1520 1521 1522 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1523 ResourceMark rm; 1524 Klass* k = throwable->klass(); 1525 assert(k != NULL, "just checking"); 1526 st->print("%s", k->external_name()); 1527 oop msg = message(throwable); 1528 if (msg != NULL) { 1529 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1530 } 1531 } 1532 1533 // After this many redefines, the stack trace is unreliable. 1534 const int MAX_VERSION = USHRT_MAX; 1535 1536 static inline bool version_matches(Method* method, int version) { 1537 assert(version < MAX_VERSION, "version is too big"); 1538 return method != NULL && (method->constants()->version() == version); 1539 } 1540 1541 1542 // This class provides a simple wrapper over the internal structure of 1543 // exception backtrace to insulate users of the backtrace from needing 1544 // to know what it looks like. 1545 class BacktraceBuilder: public StackObj { 1546 friend class BacktraceIterator; 1547 private: 1548 Handle _backtrace; 1549 objArrayOop _head; 1550 typeArrayOop _methods; 1551 typeArrayOop _bcis; 1552 objArrayOop _mirrors; 1553 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1554 int _index; 1555 NoSafepointVerifier _nsv; 1556 1557 enum { 1558 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1559 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1560 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1561 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1562 trace_next_offset = java_lang_Throwable::trace_next_offset, 1563 trace_size = java_lang_Throwable::trace_size, 1564 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1565 }; 1566 1567 // get info out of chunks 1568 static typeArrayOop get_methods(objArrayHandle chunk) { 1569 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1570 assert(methods != NULL, "method array should be initialized in backtrace"); 1571 return methods; 1572 } 1573 static typeArrayOop get_bcis(objArrayHandle chunk) { 1574 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1575 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1576 return bcis; 1577 } 1578 static objArrayOop get_mirrors(objArrayHandle chunk) { 1579 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1580 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1581 return mirrors; 1582 } 1583 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1584 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1585 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1586 return cprefs; 1587 } 1588 1589 public: 1590 1591 // constructor for new backtrace 1592 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1593 expand(CHECK); 1594 _backtrace = _head; 1595 _index = 0; 1596 } 1597 1598 BacktraceBuilder(objArrayHandle backtrace) { 1599 _methods = get_methods(backtrace); 1600 _bcis = get_bcis(backtrace); 1601 _mirrors = get_mirrors(backtrace); 1602 _cprefs = get_cprefs(backtrace); 1603 assert(_methods->length() == _bcis->length() && 1604 _methods->length() == _mirrors->length(), 1605 "method and source information arrays should match"); 1606 1607 // head is the preallocated backtrace 1608 _backtrace = _head = backtrace(); 1609 _index = 0; 1610 } 1611 1612 void expand(TRAPS) { 1613 objArrayHandle old_head(THREAD, _head); 1614 PauseNoSafepointVerifier pnsv(&_nsv); 1615 1616 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1617 objArrayHandle new_head(THREAD, head); 1618 1619 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1620 typeArrayHandle new_methods(THREAD, methods); 1621 1622 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1623 typeArrayHandle new_bcis(THREAD, bcis); 1624 1625 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1626 objArrayHandle new_mirrors(THREAD, mirrors); 1627 1628 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1629 typeArrayHandle new_cprefs(THREAD, cprefs); 1630 1631 if (!old_head.is_null()) { 1632 old_head->obj_at_put(trace_next_offset, new_head()); 1633 } 1634 new_head->obj_at_put(trace_methods_offset, new_methods()); 1635 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1636 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1637 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1638 1639 _head = new_head(); 1640 _methods = new_methods(); 1641 _bcis = new_bcis(); 1642 _mirrors = new_mirrors(); 1643 _cprefs = new_cprefs(); 1644 _index = 0; 1645 } 1646 1647 oop backtrace() { 1648 return _backtrace(); 1649 } 1650 1651 inline void push(Method* method, int bci, TRAPS) { 1652 // Smear the -1 bci to 0 since the array only holds unsigned 1653 // shorts. The later line number lookup would just smear the -1 1654 // to a 0 even if it could be recorded. 1655 if (bci == SynchronizationEntryBCI) bci = 0; 1656 1657 if (_index >= trace_chunk_size) { 1658 methodHandle mhandle(THREAD, method); 1659 expand(CHECK); 1660 method = mhandle(); 1661 } 1662 1663 _methods->short_at_put(_index, method->orig_method_idnum()); 1664 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1665 _cprefs->short_at_put(_index, method->name_index()); 1666 1667 // We need to save the mirrors in the backtrace to keep the class 1668 // from being unloaded while we still have this stack trace. 1669 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1670 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1671 _index++; 1672 } 1673 1674 }; 1675 1676 struct BacktraceElement : public StackObj { 1677 int _method_id; 1678 int _bci; 1679 int _version; 1680 int _cpref; 1681 Handle _mirror; 1682 BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) : 1683 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {} 1684 }; 1685 1686 class BacktraceIterator : public StackObj { 1687 int _index; 1688 objArrayHandle _result; 1689 objArrayHandle _mirrors; 1690 typeArrayHandle _methods; 1691 typeArrayHandle _bcis; 1692 typeArrayHandle _cprefs; 1693 1694 void init(objArrayHandle result, Thread* thread) { 1695 // Get method id, bci, version and mirror from chunk 1696 _result = result; 1697 if (_result.not_null()) { 1698 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1699 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1700 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1701 _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result)); 1702 _index = 0; 1703 } 1704 } 1705 public: 1706 BacktraceIterator(objArrayHandle result, Thread* thread) { 1707 init(result, thread); 1708 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1709 } 1710 1711 BacktraceElement next(Thread* thread) { 1712 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1713 _methods->short_at(_index), 1714 Backtrace::version_at(_bcis->int_at(_index)), 1715 Backtrace::bci_at(_bcis->int_at(_index)), 1716 _cprefs->short_at(_index)); 1717 _index++; 1718 1719 if (_index >= java_lang_Throwable::trace_chunk_size) { 1720 int next_offset = java_lang_Throwable::trace_next_offset; 1721 // Get next chunk 1722 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1723 init(result, thread); 1724 } 1725 return e; 1726 } 1727 1728 bool repeat() { 1729 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1730 } 1731 }; 1732 1733 1734 // Print stack trace element to resource allocated buffer 1735 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1736 int version, int bci, int cpref) { 1737 ResourceMark rm; 1738 1739 // Get strings and string lengths 1740 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1741 const char* klass_name = holder->external_name(); 1742 int buf_len = (int)strlen(klass_name); 1743 1744 Method* method = holder->method_with_orig_idnum(method_id, version); 1745 1746 // The method can be NULL if the requested class version is gone 1747 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1748 char* method_name = sym->as_C_string(); 1749 buf_len += (int)strlen(method_name); 1750 1751 char* source_file_name = NULL; 1752 Symbol* source = Backtrace::get_source_file_name(holder, version); 1753 if (source != NULL) { 1754 source_file_name = source->as_C_string(); 1755 buf_len += (int)strlen(source_file_name); 1756 } 1757 1758 char *module_name = NULL, *module_version = NULL; 1759 ModuleEntry* module = holder->module(); 1760 if (module->is_named()) { 1761 module_name = module->name()->as_C_string(); 1762 buf_len += (int)strlen(module_name); 1763 if (module->version() != NULL) { 1764 module_version = module->version()->as_C_string(); 1765 buf_len += (int)strlen(module_version); 1766 } 1767 } 1768 1769 // Allocate temporary buffer with extra space for formatting and line number 1770 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1771 1772 // Print stack trace line in buffer 1773 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1774 1775 // Print module information 1776 if (module_name != NULL) { 1777 if (module_version != NULL) { 1778 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1779 } else { 1780 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1781 } 1782 } 1783 1784 if (!version_matches(method, version)) { 1785 strcat(buf, "Redefined)"); 1786 } else { 1787 int line_number = Backtrace::get_line_number(method, bci); 1788 if (line_number == -2) { 1789 strcat(buf, "Native Method)"); 1790 } else { 1791 if (source_file_name != NULL && (line_number != -1)) { 1792 // Sourcename and linenumber 1793 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1794 } else if (source_file_name != NULL) { 1795 // Just sourcename 1796 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1797 } else { 1798 // Neither sourcename nor linenumber 1799 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1800 } 1801 CompiledMethod* nm = method->code(); 1802 if (WizardMode && nm != NULL) { 1803 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1804 } 1805 } 1806 } 1807 1808 st->print_cr("%s", buf); 1809 } 1810 1811 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1812 Handle mirror = method->method_holder()->java_mirror(); 1813 int method_id = method->orig_method_idnum(); 1814 int version = method->constants()->version(); 1815 int cpref = method->name_index(); 1816 print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref); 1817 } 1818 1819 /** 1820 * Print the throwable message and its stack trace plus all causes by walking the 1821 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1822 */ 1823 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1824 // First, print the message. 1825 print(throwable, st); 1826 st->cr(); 1827 1828 // Now print the stack trace. 1829 Thread* THREAD = Thread::current(); 1830 while (throwable.not_null()) { 1831 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1832 if (result.is_null()) { 1833 st->print_raw_cr("\t<<no stack trace available>>"); 1834 return; 1835 } 1836 BacktraceIterator iter(result, THREAD); 1837 1838 while (iter.repeat()) { 1839 BacktraceElement bte = iter.next(THREAD); 1840 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref); 1841 } 1842 { 1843 // Call getCause() which doesn't necessarily return the _cause field. 1844 EXCEPTION_MARK; 1845 JavaValue cause(T_OBJECT); 1846 JavaCalls::call_virtual(&cause, 1847 throwable, 1848 KlassHandle(THREAD, throwable->klass()), 1849 vmSymbols::getCause_name(), 1850 vmSymbols::void_throwable_signature(), 1851 THREAD); 1852 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1853 if (HAS_PENDING_EXCEPTION) { 1854 CLEAR_PENDING_EXCEPTION; 1855 throwable = Handle(); 1856 } else { 1857 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1858 if (throwable.not_null()) { 1859 st->print("Caused by: "); 1860 print(throwable, st); 1861 st->cr(); 1862 } 1863 } 1864 } 1865 } 1866 } 1867 1868 /** 1869 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1870 */ 1871 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1872 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1873 JavaValue result(T_VOID); 1874 JavaCalls::call_virtual(&result, 1875 throwable, 1876 KlassHandle(THREAD, SystemDictionary::Throwable_klass()), 1877 vmSymbols::printStackTrace_name(), 1878 vmSymbols::void_method_signature(), 1879 THREAD); 1880 } 1881 1882 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1883 if (!StackTraceInThrowable) return; 1884 ResourceMark rm(THREAD); 1885 1886 // Start out by clearing the backtrace for this object, in case the VM 1887 // runs out of memory while allocating the stack trace 1888 set_backtrace(throwable(), NULL); 1889 // Clear lazily constructed Java level stacktrace if refilling occurs 1890 // This is unnecessary in 1.7+ but harmless 1891 clear_stacktrace(throwable()); 1892 1893 int max_depth = MaxJavaStackTraceDepth; 1894 JavaThread* thread = (JavaThread*)THREAD; 1895 1896 BacktraceBuilder bt(CHECK); 1897 1898 // If there is no Java frame just return the method that was being called 1899 // with bci 0 1900 if (!thread->has_last_Java_frame()) { 1901 if (max_depth >= 1 && method() != NULL) { 1902 bt.push(method(), 0, CHECK); 1903 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1904 set_depth(throwable(), 1); 1905 set_backtrace(throwable(), bt.backtrace()); 1906 } 1907 return; 1908 } 1909 1910 // Instead of using vframe directly, this version of fill_in_stack_trace 1911 // basically handles everything by hand. This significantly improved the 1912 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1913 // See bug 6333838 for more details. 1914 // The "ASSERT" here is to verify this method generates the exactly same stack 1915 // trace as utilizing vframe. 1916 #ifdef ASSERT 1917 vframeStream st(thread); 1918 methodHandle st_method(THREAD, st.method()); 1919 #endif 1920 int total_count = 0; 1921 RegisterMap map(thread, false); 1922 int decode_offset = 0; 1923 CompiledMethod* nm = NULL; 1924 bool skip_fillInStackTrace_check = false; 1925 bool skip_throwableInit_check = false; 1926 bool skip_hidden = !ShowHiddenFrames; 1927 1928 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1929 Method* method = NULL; 1930 int bci = 0; 1931 1932 // Compiled java method case. 1933 if (decode_offset != 0) { 1934 DebugInfoReadStream stream(nm, decode_offset); 1935 decode_offset = stream.read_int(); 1936 method = (Method*)nm->metadata_at(stream.read_int()); 1937 bci = stream.read_bci(); 1938 } else { 1939 if (fr.is_first_frame()) break; 1940 address pc = fr.pc(); 1941 if (fr.is_interpreted_frame()) { 1942 address bcp = fr.interpreter_frame_bcp(); 1943 method = fr.interpreter_frame_method(); 1944 bci = method->bci_from(bcp); 1945 fr = fr.sender(&map); 1946 } else { 1947 CodeBlob* cb = fr.cb(); 1948 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1949 // but non nmethod 1950 fr = fr.sender(&map); 1951 if (cb == NULL || !cb->is_compiled()) { 1952 continue; 1953 } 1954 nm = cb->as_compiled_method(); 1955 if (nm->method()->is_native()) { 1956 method = nm->method(); 1957 bci = 0; 1958 } else { 1959 PcDesc* pd = nm->pc_desc_at(pc); 1960 decode_offset = pd->scope_decode_offset(); 1961 // if decode_offset is not equal to 0, it will execute the 1962 // "compiled java method case" at the beginning of the loop. 1963 continue; 1964 } 1965 } 1966 } 1967 #ifdef ASSERT 1968 assert(st_method() == method && st.bci() == bci, 1969 "Wrong stack trace"); 1970 st.next(); 1971 // vframeStream::method isn't GC-safe so store off a copy 1972 // of the Method* in case we GC. 1973 if (!st.at_end()) { 1974 st_method = st.method(); 1975 } 1976 #endif 1977 1978 // the format of the stacktrace will be: 1979 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1980 // - 0 or more <init> methods for the exception class (skipped) 1981 // - rest of the stack 1982 1983 if (!skip_fillInStackTrace_check) { 1984 if (method->name() == vmSymbols::fillInStackTrace_name() && 1985 throwable->is_a(method->method_holder())) { 1986 continue; 1987 } 1988 else { 1989 skip_fillInStackTrace_check = true; // gone past them all 1990 } 1991 } 1992 if (!skip_throwableInit_check) { 1993 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1994 1995 // skip <init> methods of the exception class and superclasses 1996 // This is simlar to classic VM. 1997 if (method->name() == vmSymbols::object_initializer_name() && 1998 throwable->is_a(method->method_holder())) { 1999 continue; 2000 } else { 2001 // there are none or we've seen them all - either way stop checking 2002 skip_throwableInit_check = true; 2003 } 2004 } 2005 if (method->is_hidden()) { 2006 if (skip_hidden) continue; 2007 } 2008 bt.push(method, bci, CHECK); 2009 total_count++; 2010 } 2011 2012 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2013 2014 // Put completed stack trace into throwable object 2015 set_backtrace(throwable(), bt.backtrace()); 2016 set_depth(throwable(), total_count); 2017 } 2018 2019 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2020 // No-op if stack trace is disabled 2021 if (!StackTraceInThrowable) { 2022 return; 2023 } 2024 2025 // Disable stack traces for some preallocated out of memory errors 2026 if (!Universe::should_fill_in_stack_trace(throwable)) { 2027 return; 2028 } 2029 2030 PRESERVE_EXCEPTION_MARK; 2031 2032 JavaThread* thread = JavaThread::active(); 2033 fill_in_stack_trace(throwable, method, thread); 2034 // ignore exceptions thrown during stack trace filling 2035 CLEAR_PENDING_EXCEPTION; 2036 } 2037 2038 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2039 // Allocate stack trace - backtrace is created but not filled in 2040 2041 // No-op if stack trace is disabled 2042 if (!StackTraceInThrowable) return; 2043 BacktraceBuilder bt(CHECK); // creates a backtrace 2044 set_backtrace(throwable(), bt.backtrace()); 2045 } 2046 2047 2048 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2049 // Fill in stack trace into preallocated backtrace (no GC) 2050 2051 // No-op if stack trace is disabled 2052 if (!StackTraceInThrowable) return; 2053 2054 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2055 2056 JavaThread* THREAD = JavaThread::current(); 2057 2058 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2059 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2060 2061 ResourceMark rm(THREAD); 2062 vframeStream st(THREAD); 2063 2064 BacktraceBuilder bt(backtrace); 2065 2066 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2067 // methods as preallocated errors aren't created by "java" code. 2068 2069 // fill in as much stack trace as possible 2070 int chunk_count = 0; 2071 for (;!st.at_end(); st.next()) { 2072 bt.push(st.method(), st.bci(), CHECK); 2073 chunk_count++; 2074 2075 // Bail-out for deep stacks 2076 if (chunk_count >= trace_chunk_size) break; 2077 } 2078 set_depth(throwable(), chunk_count); 2079 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2080 2081 // We support the Throwable immutability protocol defined for Java 7. 2082 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2083 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2084 } 2085 2086 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2087 objArrayHandle stack_trace_array_h, TRAPS) { 2088 2089 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2090 THROW(vmSymbols::java_lang_NullPointerException()); 2091 } 2092 2093 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2094 2095 if (stack_trace_array_h->length() != depth(throwable())) { 2096 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2097 } 2098 2099 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2100 BacktraceIterator iter(result, THREAD); 2101 2102 int index = 0; 2103 while (iter.repeat()) { 2104 BacktraceElement bte = iter.next(THREAD); 2105 2106 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2107 2108 if (stack_trace_element.is_null()) { 2109 THROW(vmSymbols::java_lang_NullPointerException()); 2110 } 2111 2112 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2113 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2114 2115 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2116 method, 2117 bte._version, 2118 bte._bci, 2119 bte._cpref, CHECK); 2120 } 2121 } 2122 2123 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2124 // Allocate java.lang.StackTraceElement instance 2125 Klass* k = SystemDictionary::StackTraceElement_klass(); 2126 assert(k != NULL, "must be loaded in 1.4+"); 2127 instanceKlassHandle ik (THREAD, k); 2128 if (ik->should_be_initialized()) { 2129 ik->initialize(CHECK_0); 2130 } 2131 2132 Handle element = ik->allocate_instance_handle(CHECK_0); 2133 2134 int cpref = method->name_index(); 2135 int version = method->constants()->version(); 2136 fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0); 2137 return element(); 2138 } 2139 2140 void java_lang_StackTraceElement::fill_in(Handle element, 2141 InstanceKlass* holder, const methodHandle& method, 2142 int version, int bci, int cpref, TRAPS) { 2143 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2144 2145 // Fill in class name 2146 ResourceMark rm(THREAD); 2147 const char* str = holder->external_name(); 2148 oop classname = StringTable::intern((char*) str, CHECK); 2149 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2150 2151 // The method can be NULL if the requested class version is gone 2152 Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref); 2153 2154 // Fill in method name 2155 oop methodname = StringTable::intern(sym, CHECK); 2156 java_lang_StackTraceElement::set_methodName(element(), methodname); 2157 2158 // Fill in module name and version 2159 ModuleEntry* module = holder->module(); 2160 if (module->is_named()) { 2161 oop module_name = StringTable::intern(module->name(), CHECK); 2162 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2163 oop module_version; 2164 if (module->version() != NULL) { 2165 module_version = StringTable::intern(module->version(), CHECK); 2166 } else { 2167 module_version = NULL; 2168 } 2169 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2170 } 2171 2172 if (!version_matches(method(), version)) { 2173 // The method was redefined, accurate line number information isn't available 2174 java_lang_StackTraceElement::set_fileName(element(), NULL); 2175 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2176 } else { 2177 // Fill in source file name and line number. 2178 Symbol* source = Backtrace::get_source_file_name(holder, version); 2179 if (ShowHiddenFrames && source == NULL) 2180 source = vmSymbols::unknown_class_name(); 2181 oop filename = StringTable::intern(source, CHECK); 2182 java_lang_StackTraceElement::set_fileName(element(), filename); 2183 2184 int line_number = Backtrace::get_line_number(method, bci); 2185 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2186 } 2187 } 2188 2189 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2190 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2191 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2192 // we should expand MemberName::name when Throwable uses StackTrace 2193 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2194 return method; 2195 } 2196 2197 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2198 // set Method* or mid/cpref 2199 oop mname = stackFrame->obj_field(_memberName_offset); 2200 InstanceKlass* ik = method->method_holder(); 2201 CallInfo info(method(), ik); 2202 MethodHandles::init_method_MemberName(mname, info); 2203 // set bci 2204 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2205 // method may be redefined; store the version 2206 int version = method->constants()->version(); 2207 assert((jushort)version == version, "version should be short"); 2208 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2209 } 2210 2211 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2212 ResourceMark rm(THREAD); 2213 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2214 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2215 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2216 2217 short version = stackFrame->short_field(_version_offset); 2218 short bci = stackFrame->short_field(_bci_offset); 2219 int cpref = method->name_index(); 2220 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK); 2221 } 2222 2223 void java_lang_StackFrameInfo::compute_offsets() { 2224 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2225 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2226 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2227 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2228 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2229 } 2230 2231 void java_lang_LiveStackFrameInfo::compute_offsets() { 2232 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2233 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2234 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2235 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2236 } 2237 2238 void java_lang_reflect_AccessibleObject::compute_offsets() { 2239 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2240 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2241 } 2242 2243 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2244 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2245 return (jboolean) reflect->bool_field(override_offset); 2246 } 2247 2248 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2250 reflect->bool_field_put(override_offset, (int) value); 2251 } 2252 2253 void java_lang_reflect_Method::compute_offsets() { 2254 Klass* k = SystemDictionary::reflect_Method_klass(); 2255 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2256 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2257 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2258 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2259 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2260 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2261 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2262 // The generic signature and annotations fields are only present in 1.5 2263 signature_offset = -1; 2264 annotations_offset = -1; 2265 parameter_annotations_offset = -1; 2266 annotation_default_offset = -1; 2267 type_annotations_offset = -1; 2268 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2269 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2270 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2271 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2272 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2273 } 2274 2275 Handle java_lang_reflect_Method::create(TRAPS) { 2276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2277 Klass* klass = SystemDictionary::reflect_Method_klass(); 2278 // This class is eagerly initialized during VM initialization, since we keep a refence 2279 // to one of the methods 2280 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2281 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2282 } 2283 2284 oop java_lang_reflect_Method::clazz(oop reflect) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 return reflect->obj_field(clazz_offset); 2287 } 2288 2289 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2291 reflect->obj_field_put(clazz_offset, value); 2292 } 2293 2294 int java_lang_reflect_Method::slot(oop reflect) { 2295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2296 return reflect->int_field(slot_offset); 2297 } 2298 2299 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2301 reflect->int_field_put(slot_offset, value); 2302 } 2303 2304 oop java_lang_reflect_Method::name(oop method) { 2305 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2306 return method->obj_field(name_offset); 2307 } 2308 2309 void java_lang_reflect_Method::set_name(oop method, oop value) { 2310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2311 method->obj_field_put(name_offset, value); 2312 } 2313 2314 oop java_lang_reflect_Method::return_type(oop method) { 2315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2316 return method->obj_field(returnType_offset); 2317 } 2318 2319 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2321 method->obj_field_put(returnType_offset, value); 2322 } 2323 2324 oop java_lang_reflect_Method::parameter_types(oop method) { 2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2326 return method->obj_field(parameterTypes_offset); 2327 } 2328 2329 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2331 method->obj_field_put(parameterTypes_offset, value); 2332 } 2333 2334 oop java_lang_reflect_Method::exception_types(oop method) { 2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2336 return method->obj_field(exceptionTypes_offset); 2337 } 2338 2339 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2341 method->obj_field_put(exceptionTypes_offset, value); 2342 } 2343 2344 int java_lang_reflect_Method::modifiers(oop method) { 2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2346 return method->int_field(modifiers_offset); 2347 } 2348 2349 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2351 method->int_field_put(modifiers_offset, value); 2352 } 2353 2354 bool java_lang_reflect_Method::has_signature_field() { 2355 return (signature_offset >= 0); 2356 } 2357 2358 oop java_lang_reflect_Method::signature(oop method) { 2359 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2360 assert(has_signature_field(), "signature field must be present"); 2361 return method->obj_field(signature_offset); 2362 } 2363 2364 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2366 assert(has_signature_field(), "signature field must be present"); 2367 method->obj_field_put(signature_offset, value); 2368 } 2369 2370 bool java_lang_reflect_Method::has_annotations_field() { 2371 return (annotations_offset >= 0); 2372 } 2373 2374 oop java_lang_reflect_Method::annotations(oop method) { 2375 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2376 assert(has_annotations_field(), "annotations field must be present"); 2377 return method->obj_field(annotations_offset); 2378 } 2379 2380 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2382 assert(has_annotations_field(), "annotations field must be present"); 2383 method->obj_field_put(annotations_offset, value); 2384 } 2385 2386 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2387 return (parameter_annotations_offset >= 0); 2388 } 2389 2390 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2392 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2393 return method->obj_field(parameter_annotations_offset); 2394 } 2395 2396 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2397 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2398 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2399 method->obj_field_put(parameter_annotations_offset, value); 2400 } 2401 2402 bool java_lang_reflect_Method::has_annotation_default_field() { 2403 return (annotation_default_offset >= 0); 2404 } 2405 2406 oop java_lang_reflect_Method::annotation_default(oop method) { 2407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2408 assert(has_annotation_default_field(), "annotation default field must be present"); 2409 return method->obj_field(annotation_default_offset); 2410 } 2411 2412 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2414 assert(has_annotation_default_field(), "annotation default field must be present"); 2415 method->obj_field_put(annotation_default_offset, value); 2416 } 2417 2418 bool java_lang_reflect_Method::has_type_annotations_field() { 2419 return (type_annotations_offset >= 0); 2420 } 2421 2422 oop java_lang_reflect_Method::type_annotations(oop method) { 2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2424 assert(has_type_annotations_field(), "type_annotations field must be present"); 2425 return method->obj_field(type_annotations_offset); 2426 } 2427 2428 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2430 assert(has_type_annotations_field(), "type_annotations field must be present"); 2431 method->obj_field_put(type_annotations_offset, value); 2432 } 2433 2434 void java_lang_reflect_Constructor::compute_offsets() { 2435 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2436 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2437 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2438 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2439 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2440 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2441 // The generic signature and annotations fields are only present in 1.5 2442 signature_offset = -1; 2443 annotations_offset = -1; 2444 parameter_annotations_offset = -1; 2445 type_annotations_offset = -1; 2446 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2447 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2448 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2449 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2450 } 2451 2452 Handle java_lang_reflect_Constructor::create(TRAPS) { 2453 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2454 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2455 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2456 instanceKlassHandle klass (THREAD, k); 2457 // Ensure it is initialized 2458 klass->initialize(CHECK_NH); 2459 return klass->allocate_instance_handle(THREAD); 2460 } 2461 2462 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2463 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2464 return reflect->obj_field(clazz_offset); 2465 } 2466 2467 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2468 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2469 reflect->obj_field_put(clazz_offset, value); 2470 } 2471 2472 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2473 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2474 return constructor->obj_field(parameterTypes_offset); 2475 } 2476 2477 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2478 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2479 constructor->obj_field_put(parameterTypes_offset, value); 2480 } 2481 2482 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2483 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2484 return constructor->obj_field(exceptionTypes_offset); 2485 } 2486 2487 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2488 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2489 constructor->obj_field_put(exceptionTypes_offset, value); 2490 } 2491 2492 int java_lang_reflect_Constructor::slot(oop reflect) { 2493 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2494 return reflect->int_field(slot_offset); 2495 } 2496 2497 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2498 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2499 reflect->int_field_put(slot_offset, value); 2500 } 2501 2502 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2504 return constructor->int_field(modifiers_offset); 2505 } 2506 2507 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2508 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2509 constructor->int_field_put(modifiers_offset, value); 2510 } 2511 2512 bool java_lang_reflect_Constructor::has_signature_field() { 2513 return (signature_offset >= 0); 2514 } 2515 2516 oop java_lang_reflect_Constructor::signature(oop constructor) { 2517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2518 assert(has_signature_field(), "signature field must be present"); 2519 return constructor->obj_field(signature_offset); 2520 } 2521 2522 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2523 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2524 assert(has_signature_field(), "signature field must be present"); 2525 constructor->obj_field_put(signature_offset, value); 2526 } 2527 2528 bool java_lang_reflect_Constructor::has_annotations_field() { 2529 return (annotations_offset >= 0); 2530 } 2531 2532 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2533 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2534 assert(has_annotations_field(), "annotations field must be present"); 2535 return constructor->obj_field(annotations_offset); 2536 } 2537 2538 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2539 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2540 assert(has_annotations_field(), "annotations field must be present"); 2541 constructor->obj_field_put(annotations_offset, value); 2542 } 2543 2544 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2545 return (parameter_annotations_offset >= 0); 2546 } 2547 2548 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2549 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2550 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2551 return method->obj_field(parameter_annotations_offset); 2552 } 2553 2554 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2555 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2556 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2557 method->obj_field_put(parameter_annotations_offset, value); 2558 } 2559 2560 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2561 return (type_annotations_offset >= 0); 2562 } 2563 2564 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2566 assert(has_type_annotations_field(), "type_annotations field must be present"); 2567 return constructor->obj_field(type_annotations_offset); 2568 } 2569 2570 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2571 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2572 assert(has_type_annotations_field(), "type_annotations field must be present"); 2573 constructor->obj_field_put(type_annotations_offset, value); 2574 } 2575 2576 void java_lang_reflect_Field::compute_offsets() { 2577 Klass* k = SystemDictionary::reflect_Field_klass(); 2578 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2579 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2580 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2581 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2582 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2583 // The generic signature and annotations fields are only present in 1.5 2584 signature_offset = -1; 2585 annotations_offset = -1; 2586 type_annotations_offset = -1; 2587 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2588 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2589 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2590 } 2591 2592 Handle java_lang_reflect_Field::create(TRAPS) { 2593 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2594 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2595 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2596 instanceKlassHandle klass (THREAD, k); 2597 // Ensure it is initialized 2598 klass->initialize(CHECK_NH); 2599 return klass->allocate_instance_handle(THREAD); 2600 } 2601 2602 oop java_lang_reflect_Field::clazz(oop reflect) { 2603 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2604 return reflect->obj_field(clazz_offset); 2605 } 2606 2607 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2608 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2609 reflect->obj_field_put(clazz_offset, value); 2610 } 2611 2612 oop java_lang_reflect_Field::name(oop field) { 2613 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2614 return field->obj_field(name_offset); 2615 } 2616 2617 void java_lang_reflect_Field::set_name(oop field, oop value) { 2618 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2619 field->obj_field_put(name_offset, value); 2620 } 2621 2622 oop java_lang_reflect_Field::type(oop field) { 2623 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2624 return field->obj_field(type_offset); 2625 } 2626 2627 void java_lang_reflect_Field::set_type(oop field, oop value) { 2628 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2629 field->obj_field_put(type_offset, value); 2630 } 2631 2632 int java_lang_reflect_Field::slot(oop reflect) { 2633 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2634 return reflect->int_field(slot_offset); 2635 } 2636 2637 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2638 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2639 reflect->int_field_put(slot_offset, value); 2640 } 2641 2642 int java_lang_reflect_Field::modifiers(oop field) { 2643 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2644 return field->int_field(modifiers_offset); 2645 } 2646 2647 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2648 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2649 field->int_field_put(modifiers_offset, value); 2650 } 2651 2652 bool java_lang_reflect_Field::has_signature_field() { 2653 return (signature_offset >= 0); 2654 } 2655 2656 oop java_lang_reflect_Field::signature(oop field) { 2657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2658 assert(has_signature_field(), "signature field must be present"); 2659 return field->obj_field(signature_offset); 2660 } 2661 2662 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2664 assert(has_signature_field(), "signature field must be present"); 2665 field->obj_field_put(signature_offset, value); 2666 } 2667 2668 bool java_lang_reflect_Field::has_annotations_field() { 2669 return (annotations_offset >= 0); 2670 } 2671 2672 oop java_lang_reflect_Field::annotations(oop field) { 2673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2674 assert(has_annotations_field(), "annotations field must be present"); 2675 return field->obj_field(annotations_offset); 2676 } 2677 2678 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2680 assert(has_annotations_field(), "annotations field must be present"); 2681 field->obj_field_put(annotations_offset, value); 2682 } 2683 2684 bool java_lang_reflect_Field::has_type_annotations_field() { 2685 return (type_annotations_offset >= 0); 2686 } 2687 2688 oop java_lang_reflect_Field::type_annotations(oop field) { 2689 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2690 assert(has_type_annotations_field(), "type_annotations field must be present"); 2691 return field->obj_field(type_annotations_offset); 2692 } 2693 2694 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2696 assert(has_type_annotations_field(), "type_annotations field must be present"); 2697 field->obj_field_put(type_annotations_offset, value); 2698 } 2699 2700 void reflect_ConstantPool::compute_offsets() { 2701 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2702 // This null test can be removed post beta 2703 if (k != NULL) { 2704 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2705 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2706 } 2707 } 2708 2709 void java_lang_reflect_Parameter::compute_offsets() { 2710 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2711 if(NULL != k) { 2712 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2713 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2714 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2715 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2716 } 2717 } 2718 2719 Handle java_lang_reflect_Parameter::create(TRAPS) { 2720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2721 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2722 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2723 instanceKlassHandle klass (THREAD, k); 2724 // Ensure it is initialized 2725 klass->initialize(CHECK_NH); 2726 return klass->allocate_instance_handle(THREAD); 2727 } 2728 2729 oop java_lang_reflect_Parameter::name(oop param) { 2730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2731 return param->obj_field(name_offset); 2732 } 2733 2734 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2736 param->obj_field_put(name_offset, value); 2737 } 2738 2739 int java_lang_reflect_Parameter::modifiers(oop param) { 2740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2741 return param->int_field(modifiers_offset); 2742 } 2743 2744 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2746 param->int_field_put(modifiers_offset, value); 2747 } 2748 2749 int java_lang_reflect_Parameter::index(oop param) { 2750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2751 return param->int_field(index_offset); 2752 } 2753 2754 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2756 param->int_field_put(index_offset, value); 2757 } 2758 2759 oop java_lang_reflect_Parameter::executable(oop param) { 2760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2761 return param->obj_field(executable_offset); 2762 } 2763 2764 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2766 param->obj_field_put(executable_offset, value); 2767 } 2768 2769 2770 int java_lang_reflect_Module::loader_offset; 2771 int java_lang_reflect_Module::name_offset; 2772 int java_lang_reflect_Module::_module_entry_offset = -1; 2773 2774 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) { 2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2776 2777 Symbol* name = vmSymbols::java_lang_reflect_Module(); 2778 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2779 instanceKlassHandle klass (THREAD, k); 2780 2781 Handle jlrmh = klass->allocate_instance_handle(CHECK_NH); 2782 JavaValue result(T_VOID); 2783 JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()), 2784 vmSymbols::object_initializer_name(), 2785 vmSymbols::java_lang_reflect_module_init_signature(), 2786 loader, module_name, CHECK_NH); 2787 return jlrmh; 2788 } 2789 2790 void java_lang_reflect_Module::compute_offsets() { 2791 Klass* k = SystemDictionary::reflect_Module_klass(); 2792 if(NULL != k) { 2793 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2794 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2795 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2796 } 2797 } 2798 2799 2800 oop java_lang_reflect_Module::loader(oop module) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 return module->obj_field(loader_offset); 2803 } 2804 2805 void java_lang_reflect_Module::set_loader(oop module, oop value) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 module->obj_field_put(loader_offset, value); 2808 } 2809 2810 oop java_lang_reflect_Module::name(oop module) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 return module->obj_field(name_offset); 2813 } 2814 2815 void java_lang_reflect_Module::set_name(oop module, oop value) { 2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2817 module->obj_field_put(name_offset, value); 2818 } 2819 2820 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) { 2821 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2822 assert(module != NULL, "module can't be null"); 2823 assert(module->is_oop(), "module must be oop"); 2824 2825 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2826 if (module_entry == NULL) { 2827 // If the inject field containing the ModuleEntry* is null then return the 2828 // class loader's unnamed module. 2829 oop loader = java_lang_reflect_Module::loader(module); 2830 Handle h_loader = Handle(THREAD, loader); 2831 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2832 return loader_cld->modules()->unnamed_module(); 2833 } 2834 return module_entry; 2835 } 2836 2837 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2838 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2839 assert(module != NULL, "module can't be null"); 2840 assert(module->is_oop(), "module must be oop"); 2841 module->address_field_put(_module_entry_offset, (address)module_entry); 2842 } 2843 2844 Handle reflect_ConstantPool::create(TRAPS) { 2845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2846 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2847 instanceKlassHandle klass (THREAD, k); 2848 // Ensure it is initialized 2849 klass->initialize(CHECK_NH); 2850 return klass->allocate_instance_handle(THREAD); 2851 } 2852 2853 2854 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2856 oop mirror = value->pool_holder()->java_mirror(); 2857 // Save the mirror to get back the constant pool. 2858 reflect->obj_field_put(_oop_offset, mirror); 2859 } 2860 2861 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2863 2864 oop mirror = reflect->obj_field(_oop_offset); 2865 Klass* k = java_lang_Class::as_Klass(mirror); 2866 assert(k->is_instance_klass(), "Must be"); 2867 2868 // Get the constant pool back from the klass. Since class redefinition 2869 // merges the new constant pool into the old, this is essentially the 2870 // same constant pool as the original. If constant pool merging is 2871 // no longer done in the future, this will have to change to save 2872 // the original. 2873 return InstanceKlass::cast(k)->constants(); 2874 } 2875 2876 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2877 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2878 // This null test can be removed post beta 2879 if (k != NULL) { 2880 compute_offset(_base_offset, k, 2881 vmSymbols::base_name(), vmSymbols::object_signature()); 2882 } 2883 } 2884 2885 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2886 Klass* k = SystemDictionary::box_klass(type); 2887 if (k == NULL) return NULL; 2888 instanceKlassHandle h (THREAD, k); 2889 if (!h->is_initialized()) h->initialize(CHECK_0); 2890 return h->allocate_instance(THREAD); 2891 } 2892 2893 2894 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2895 oop box = initialize_and_allocate(type, CHECK_0); 2896 if (box == NULL) return NULL; 2897 switch (type) { 2898 case T_BOOLEAN: 2899 box->bool_field_put(value_offset, value->z); 2900 break; 2901 case T_CHAR: 2902 box->char_field_put(value_offset, value->c); 2903 break; 2904 case T_FLOAT: 2905 box->float_field_put(value_offset, value->f); 2906 break; 2907 case T_DOUBLE: 2908 box->double_field_put(long_value_offset, value->d); 2909 break; 2910 case T_BYTE: 2911 box->byte_field_put(value_offset, value->b); 2912 break; 2913 case T_SHORT: 2914 box->short_field_put(value_offset, value->s); 2915 break; 2916 case T_INT: 2917 box->int_field_put(value_offset, value->i); 2918 break; 2919 case T_LONG: 2920 box->long_field_put(long_value_offset, value->j); 2921 break; 2922 default: 2923 return NULL; 2924 } 2925 return box; 2926 } 2927 2928 2929 BasicType java_lang_boxing_object::basic_type(oop box) { 2930 if (box == NULL) return T_ILLEGAL; 2931 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2932 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2933 return T_ILLEGAL; 2934 return type; 2935 } 2936 2937 2938 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2939 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2940 switch (type) { 2941 case T_BOOLEAN: 2942 value->z = box->bool_field(value_offset); 2943 break; 2944 case T_CHAR: 2945 value->c = box->char_field(value_offset); 2946 break; 2947 case T_FLOAT: 2948 value->f = box->float_field(value_offset); 2949 break; 2950 case T_DOUBLE: 2951 value->d = box->double_field(long_value_offset); 2952 break; 2953 case T_BYTE: 2954 value->b = box->byte_field(value_offset); 2955 break; 2956 case T_SHORT: 2957 value->s = box->short_field(value_offset); 2958 break; 2959 case T_INT: 2960 value->i = box->int_field(value_offset); 2961 break; 2962 case T_LONG: 2963 value->j = box->long_field(long_value_offset); 2964 break; 2965 default: 2966 return T_ILLEGAL; 2967 } // end switch 2968 return type; 2969 } 2970 2971 2972 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2973 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2974 switch (type) { 2975 case T_BOOLEAN: 2976 box->bool_field_put(value_offset, value->z); 2977 break; 2978 case T_CHAR: 2979 box->char_field_put(value_offset, value->c); 2980 break; 2981 case T_FLOAT: 2982 box->float_field_put(value_offset, value->f); 2983 break; 2984 case T_DOUBLE: 2985 box->double_field_put(long_value_offset, value->d); 2986 break; 2987 case T_BYTE: 2988 box->byte_field_put(value_offset, value->b); 2989 break; 2990 case T_SHORT: 2991 box->short_field_put(value_offset, value->s); 2992 break; 2993 case T_INT: 2994 box->int_field_put(value_offset, value->i); 2995 break; 2996 case T_LONG: 2997 box->long_field_put(long_value_offset, value->j); 2998 break; 2999 default: 3000 return T_ILLEGAL; 3001 } // end switch 3002 return type; 3003 } 3004 3005 3006 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3007 switch (type) { 3008 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3009 case T_CHAR: st->print("%d", value->c); break; 3010 case T_BYTE: st->print("%d", value->b); break; 3011 case T_SHORT: st->print("%d", value->s); break; 3012 case T_INT: st->print("%d", value->i); break; 3013 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3014 case T_FLOAT: st->print("%f", value->f); break; 3015 case T_DOUBLE: st->print("%lf", value->d); break; 3016 default: st->print("type %d?", type); break; 3017 } 3018 } 3019 3020 3021 // Support for java_lang_ref_Reference 3022 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 3023 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3024 address addr = ik->static_field_addr(static_lock_offset); 3025 return (HeapWord*) addr; 3026 } 3027 3028 oop java_lang_ref_Reference::pending_list_lock() { 3029 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3030 address addr = ik->static_field_addr(static_lock_offset); 3031 if (UseCompressedOops) { 3032 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 3033 } else { 3034 return oopDesc::load_decode_heap_oop((oop*)addr); 3035 } 3036 } 3037 3038 HeapWord *java_lang_ref_Reference::pending_list_addr() { 3039 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3040 address addr = ik->static_field_addr(static_pending_offset); 3041 // XXX This might not be HeapWord aligned, almost rather be char *. 3042 return (HeapWord*)addr; 3043 } 3044 3045 oop java_lang_ref_Reference::pending_list() { 3046 char *addr = (char *)pending_list_addr(); 3047 if (UseCompressedOops) { 3048 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 3049 } else { 3050 return oopDesc::load_decode_heap_oop((oop*)addr); 3051 } 3052 } 3053 3054 3055 // Support for java_lang_ref_SoftReference 3056 3057 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3058 return ref->long_field(timestamp_offset); 3059 } 3060 3061 jlong java_lang_ref_SoftReference::clock() { 3062 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3063 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3064 return *offset; 3065 } 3066 3067 void java_lang_ref_SoftReference::set_clock(jlong value) { 3068 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3069 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3070 *offset = value; 3071 } 3072 3073 // Support for java_lang_invoke_DirectMethodHandle 3074 3075 int java_lang_invoke_DirectMethodHandle::_member_offset; 3076 3077 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3078 oop member_name = NULL; 3079 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3080 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3081 if (is_dmh) { 3082 member_name = dmh->obj_field(member_offset_in_bytes()); 3083 } 3084 return member_name; 3085 } 3086 3087 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3088 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3089 if (klass_oop != NULL) { 3090 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3091 } 3092 } 3093 3094 // Support for java_lang_invoke_MethodHandle 3095 3096 int java_lang_invoke_MethodHandle::_type_offset; 3097 int java_lang_invoke_MethodHandle::_form_offset; 3098 3099 int java_lang_invoke_MemberName::_clazz_offset; 3100 int java_lang_invoke_MemberName::_name_offset; 3101 int java_lang_invoke_MemberName::_type_offset; 3102 int java_lang_invoke_MemberName::_flags_offset; 3103 int java_lang_invoke_MemberName::_vmtarget_offset; 3104 int java_lang_invoke_MemberName::_vmloader_offset; 3105 int java_lang_invoke_MemberName::_vmindex_offset; 3106 3107 int java_lang_invoke_LambdaForm::_vmentry_offset; 3108 3109 void java_lang_invoke_MethodHandle::compute_offsets() { 3110 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3111 if (klass_oop != NULL) { 3112 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3113 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3114 } 3115 } 3116 3117 void java_lang_invoke_MemberName::compute_offsets() { 3118 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3119 if (klass_oop != NULL) { 3120 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3121 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3122 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3123 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3124 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3125 } 3126 } 3127 3128 void java_lang_invoke_LambdaForm::compute_offsets() { 3129 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3130 if (klass_oop != NULL) { 3131 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3132 } 3133 } 3134 3135 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3136 return obj != NULL && is_subclass(obj->klass()); 3137 } 3138 3139 3140 oop java_lang_invoke_MethodHandle::type(oop mh) { 3141 return mh->obj_field(_type_offset); 3142 } 3143 3144 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3145 mh->obj_field_put(_type_offset, mtype); 3146 } 3147 3148 oop java_lang_invoke_MethodHandle::form(oop mh) { 3149 assert(_form_offset != 0, ""); 3150 return mh->obj_field(_form_offset); 3151 } 3152 3153 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3154 assert(_form_offset != 0, ""); 3155 mh->obj_field_put(_form_offset, lform); 3156 } 3157 3158 /// MemberName accessors 3159 3160 oop java_lang_invoke_MemberName::clazz(oop mname) { 3161 assert(is_instance(mname), "wrong type"); 3162 return mname->obj_field(_clazz_offset); 3163 } 3164 3165 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3166 assert(is_instance(mname), "wrong type"); 3167 mname->obj_field_put(_clazz_offset, clazz); 3168 } 3169 3170 oop java_lang_invoke_MemberName::name(oop mname) { 3171 assert(is_instance(mname), "wrong type"); 3172 return mname->obj_field(_name_offset); 3173 } 3174 3175 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3176 assert(is_instance(mname), "wrong type"); 3177 mname->obj_field_put(_name_offset, name); 3178 } 3179 3180 oop java_lang_invoke_MemberName::type(oop mname) { 3181 assert(is_instance(mname), "wrong type"); 3182 return mname->obj_field(_type_offset); 3183 } 3184 3185 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3186 assert(is_instance(mname), "wrong type"); 3187 mname->obj_field_put(_type_offset, type); 3188 } 3189 3190 int java_lang_invoke_MemberName::flags(oop mname) { 3191 assert(is_instance(mname), "wrong type"); 3192 return mname->int_field(_flags_offset); 3193 } 3194 3195 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3196 assert(is_instance(mname), "wrong type"); 3197 mname->int_field_put(_flags_offset, flags); 3198 } 3199 3200 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3201 assert(is_instance(mname), "wrong type"); 3202 return (Metadata*)mname->address_field(_vmtarget_offset); 3203 } 3204 3205 bool java_lang_invoke_MemberName::is_method(oop mname) { 3206 assert(is_instance(mname), "must be MemberName"); 3207 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3208 } 3209 3210 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3211 assert(is_instance(mname), "wrong type"); 3212 // check the type of the vmtarget 3213 oop dependency = NULL; 3214 if (ref != NULL) { 3215 switch (flags(mname) & (MN_IS_METHOD | 3216 MN_IS_CONSTRUCTOR | 3217 MN_IS_FIELD)) { 3218 case MN_IS_METHOD: 3219 case MN_IS_CONSTRUCTOR: 3220 assert(ref->is_method(), "should be a method"); 3221 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3222 break; 3223 case MN_IS_FIELD: 3224 assert(ref->is_klass(), "should be a class"); 3225 dependency = ((Klass*)ref)->java_mirror(); 3226 break; 3227 default: 3228 ShouldNotReachHere(); 3229 } 3230 } 3231 mname->address_field_put(_vmtarget_offset, (address)ref); 3232 // Add a reference to the loader (actually mirror because anonymous classes will not have 3233 // distinct loaders) to ensure the metadata is kept alive 3234 // This mirror may be different than the one in clazz field. 3235 mname->obj_field_put(_vmloader_offset, dependency); 3236 } 3237 3238 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3239 assert(is_instance(mname), "wrong type"); 3240 return (intptr_t) mname->address_field(_vmindex_offset); 3241 } 3242 3243 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3244 assert(is_instance(mname), "wrong type"); 3245 mname->address_field_put(_vmindex_offset, (address) index); 3246 } 3247 3248 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) { 3249 if (mn1 == mn2) { 3250 return true; 3251 } 3252 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) && 3253 vmindex(mn1) == vmindex(mn2) && 3254 clazz(mn1) == clazz(mn2)); 3255 } 3256 3257 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3258 assert(is_instance(lform), "wrong type"); 3259 return lform->obj_field(_vmentry_offset); 3260 } 3261 3262 3263 // Support for java_lang_invoke_MethodType 3264 3265 int java_lang_invoke_MethodType::_rtype_offset; 3266 int java_lang_invoke_MethodType::_ptypes_offset; 3267 3268 void java_lang_invoke_MethodType::compute_offsets() { 3269 Klass* k = SystemDictionary::MethodType_klass(); 3270 if (k != NULL) { 3271 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3272 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3273 } 3274 } 3275 3276 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3277 st->print("("); 3278 objArrayOop pts = ptypes(mt); 3279 for (int i = 0, limit = pts->length(); i < limit; i++) { 3280 java_lang_Class::print_signature(pts->obj_at(i), st); 3281 } 3282 st->print(")"); 3283 java_lang_Class::print_signature(rtype(mt), st); 3284 } 3285 3286 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3287 ResourceMark rm; 3288 stringStream buffer(128); 3289 print_signature(mt, &buffer); 3290 const char* sigstr = buffer.base(); 3291 int siglen = (int) buffer.size(); 3292 Symbol *name; 3293 if (!intern_if_not_found) { 3294 name = SymbolTable::probe(sigstr, siglen); 3295 } else { 3296 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3297 } 3298 return name; 3299 } 3300 3301 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3302 if (mt1 == mt2) 3303 return true; 3304 if (rtype(mt1) != rtype(mt2)) 3305 return false; 3306 if (ptype_count(mt1) != ptype_count(mt2)) 3307 return false; 3308 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3309 if (ptype(mt1, i) != ptype(mt2, i)) 3310 return false; 3311 } 3312 return true; 3313 } 3314 3315 oop java_lang_invoke_MethodType::rtype(oop mt) { 3316 assert(is_instance(mt), "must be a MethodType"); 3317 return mt->obj_field(_rtype_offset); 3318 } 3319 3320 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3321 assert(is_instance(mt), "must be a MethodType"); 3322 return (objArrayOop) mt->obj_field(_ptypes_offset); 3323 } 3324 3325 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3326 return ptypes(mt)->obj_at(idx); 3327 } 3328 3329 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3330 return ptypes(mt)->length(); 3331 } 3332 3333 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3334 objArrayOop pts = ptypes(mt); 3335 int count = pts->length(); 3336 int slots = 0; 3337 for (int i = 0; i < count; i++) { 3338 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3339 slots += type2size[bt]; 3340 } 3341 return slots; 3342 } 3343 3344 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3345 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3346 return type2size[bt]; 3347 } 3348 3349 3350 // Support for java_lang_invoke_CallSite 3351 3352 int java_lang_invoke_CallSite::_target_offset; 3353 int java_lang_invoke_CallSite::_context_offset; 3354 3355 void java_lang_invoke_CallSite::compute_offsets() { 3356 Klass* k = SystemDictionary::CallSite_klass(); 3357 if (k != NULL) { 3358 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3359 compute_offset(_context_offset, k, vmSymbols::context_name(), 3360 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3361 } 3362 } 3363 3364 oop java_lang_invoke_CallSite::context(oop call_site) { 3365 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3366 3367 oop dep_oop = call_site->obj_field(_context_offset); 3368 return dep_oop; 3369 } 3370 3371 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3372 3373 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3374 3375 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3376 Klass* k = SystemDictionary::Context_klass(); 3377 if (k != NULL) { 3378 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3379 } 3380 } 3381 3382 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3383 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3384 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3385 DependencyContext dep_ctx(vmdeps_addr); 3386 return dep_ctx; 3387 } 3388 3389 // Support for java_security_AccessControlContext 3390 3391 int java_security_AccessControlContext::_context_offset = 0; 3392 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3393 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3394 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3395 3396 void java_security_AccessControlContext::compute_offsets() { 3397 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3398 fieldDescriptor fd; 3399 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3400 3401 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3402 fatal("Invalid layout of java.security.AccessControlContext"); 3403 } 3404 _context_offset = fd.offset(); 3405 3406 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3407 fatal("Invalid layout of java.security.AccessControlContext"); 3408 } 3409 _privilegedContext_offset = fd.offset(); 3410 3411 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3412 fatal("Invalid layout of java.security.AccessControlContext"); 3413 } 3414 _isPrivileged_offset = fd.offset(); 3415 3416 // The offset may not be present for bootstrapping with older JDK. 3417 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3418 _isAuthorized_offset = fd.offset(); 3419 } 3420 } 3421 3422 3423 bool java_security_AccessControlContext::is_authorized(Handle context) { 3424 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3425 assert(_isAuthorized_offset != -1, "should be set"); 3426 return context->bool_field(_isAuthorized_offset) != 0; 3427 } 3428 3429 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3430 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3431 // Ensure klass is initialized 3432 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3433 // Allocate result 3434 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3435 // Fill in values 3436 result->obj_field_put(_context_offset, context()); 3437 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3438 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3439 // whitelist AccessControlContexts created by the JVM if present 3440 if (_isAuthorized_offset != -1) { 3441 result->bool_field_put(_isAuthorized_offset, true); 3442 } 3443 return result; 3444 } 3445 3446 3447 // Support for java_lang_ClassLoader 3448 3449 bool java_lang_ClassLoader::offsets_computed = false; 3450 int java_lang_ClassLoader::_loader_data_offset = -1; 3451 int java_lang_ClassLoader::parallelCapable_offset = -1; 3452 int java_lang_ClassLoader::unnamedModule_offset = -1; 3453 3454 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3455 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3456 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3457 } 3458 3459 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3460 return *java_lang_ClassLoader::loader_data_addr(loader); 3461 } 3462 3463 void java_lang_ClassLoader::compute_offsets() { 3464 assert(!offsets_computed, "offsets should be initialized only once"); 3465 offsets_computed = true; 3466 3467 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3468 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3469 compute_optional_offset(parallelCapable_offset, 3470 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3471 3472 compute_offset(unnamedModule_offset, 3473 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3474 3475 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3476 } 3477 3478 oop java_lang_ClassLoader::parent(oop loader) { 3479 assert(is_instance(loader), "loader must be oop"); 3480 return loader->obj_field(parent_offset); 3481 } 3482 3483 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3484 assert(is_instance(loader), "loader must be oop"); 3485 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3486 oop acl = loader; 3487 debug_only(jint loop_count = 0); 3488 // This loop taken verbatim from ClassLoader.java: 3489 do { 3490 acl = parent(acl); 3491 if (cl == acl) { 3492 return true; 3493 } 3494 assert(++loop_count > 0, "loop_count overflow"); 3495 } while (acl != NULL); 3496 return false; 3497 } 3498 3499 bool java_lang_ClassLoader::is_instance(oop obj) { 3500 return obj != NULL && is_subclass(obj->klass()); 3501 } 3502 3503 3504 // For class loader classes, parallelCapable defined 3505 // based on non-null field 3506 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3507 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3508 if (parallelCapable_offset == -1) { 3509 // Default for backward compatibility is false 3510 return false; 3511 } 3512 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3513 } 3514 3515 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3516 // Fix for 4474172; see evaluation for more details 3517 loader = non_reflection_class_loader(loader); 3518 3519 oop cl = SystemDictionary::java_system_loader(); 3520 while(cl != NULL) { 3521 if (cl == loader) return true; 3522 cl = parent(cl); 3523 } 3524 return false; 3525 } 3526 3527 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3528 if (loader != NULL) { 3529 // See whether this is one of the class loaders associated with 3530 // the generated bytecodes for reflection, and if so, "magically" 3531 // delegate to its parent to prevent class loading from occurring 3532 // in places where applications using reflection didn't expect it. 3533 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3534 // This might be null in non-1.4 JDKs 3535 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3536 return parent(loader); 3537 } 3538 } 3539 return loader; 3540 } 3541 3542 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3543 assert(is_instance(loader), "loader must be oop"); 3544 return loader->obj_field(unnamedModule_offset); 3545 } 3546 3547 // Support for java_lang_System 3548 int java_lang_System::in_offset_in_bytes() { 3549 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3550 } 3551 3552 3553 int java_lang_System::out_offset_in_bytes() { 3554 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3555 } 3556 3557 3558 int java_lang_System::err_offset_in_bytes() { 3559 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3560 } 3561 3562 3563 bool java_lang_System::has_security_manager() { 3564 InstanceKlass* ik = SystemDictionary::System_klass(); 3565 address addr = ik->static_field_addr(static_security_offset); 3566 if (UseCompressedOops) { 3567 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3568 } else { 3569 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3570 } 3571 } 3572 3573 int java_lang_Class::_klass_offset; 3574 int java_lang_Class::_array_klass_offset; 3575 int java_lang_Class::_oop_size_offset; 3576 int java_lang_Class::_static_oop_field_count_offset; 3577 int java_lang_Class::_class_loader_offset; 3578 int java_lang_Class::_module_offset; 3579 int java_lang_Class::_protection_domain_offset; 3580 int java_lang_Class::_component_mirror_offset; 3581 int java_lang_Class::_init_lock_offset; 3582 int java_lang_Class::_signers_offset; 3583 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3584 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3585 int java_lang_Throwable::backtrace_offset; 3586 int java_lang_Throwable::detailMessage_offset; 3587 int java_lang_Throwable::stackTrace_offset; 3588 int java_lang_Throwable::depth_offset; 3589 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3590 int java_lang_reflect_AccessibleObject::override_offset; 3591 int java_lang_reflect_Method::clazz_offset; 3592 int java_lang_reflect_Method::name_offset; 3593 int java_lang_reflect_Method::returnType_offset; 3594 int java_lang_reflect_Method::parameterTypes_offset; 3595 int java_lang_reflect_Method::exceptionTypes_offset; 3596 int java_lang_reflect_Method::slot_offset; 3597 int java_lang_reflect_Method::modifiers_offset; 3598 int java_lang_reflect_Method::signature_offset; 3599 int java_lang_reflect_Method::annotations_offset; 3600 int java_lang_reflect_Method::parameter_annotations_offset; 3601 int java_lang_reflect_Method::annotation_default_offset; 3602 int java_lang_reflect_Method::type_annotations_offset; 3603 int java_lang_reflect_Constructor::clazz_offset; 3604 int java_lang_reflect_Constructor::parameterTypes_offset; 3605 int java_lang_reflect_Constructor::exceptionTypes_offset; 3606 int java_lang_reflect_Constructor::slot_offset; 3607 int java_lang_reflect_Constructor::modifiers_offset; 3608 int java_lang_reflect_Constructor::signature_offset; 3609 int java_lang_reflect_Constructor::annotations_offset; 3610 int java_lang_reflect_Constructor::parameter_annotations_offset; 3611 int java_lang_reflect_Constructor::type_annotations_offset; 3612 int java_lang_reflect_Field::clazz_offset; 3613 int java_lang_reflect_Field::name_offset; 3614 int java_lang_reflect_Field::type_offset; 3615 int java_lang_reflect_Field::slot_offset; 3616 int java_lang_reflect_Field::modifiers_offset; 3617 int java_lang_reflect_Field::signature_offset; 3618 int java_lang_reflect_Field::annotations_offset; 3619 int java_lang_reflect_Field::type_annotations_offset; 3620 int java_lang_reflect_Parameter::name_offset; 3621 int java_lang_reflect_Parameter::modifiers_offset; 3622 int java_lang_reflect_Parameter::index_offset; 3623 int java_lang_reflect_Parameter::executable_offset; 3624 int java_lang_boxing_object::value_offset; 3625 int java_lang_boxing_object::long_value_offset; 3626 int java_lang_ref_Reference::referent_offset; 3627 int java_lang_ref_Reference::queue_offset; 3628 int java_lang_ref_Reference::next_offset; 3629 int java_lang_ref_Reference::discovered_offset; 3630 int java_lang_ref_Reference::static_lock_offset; 3631 int java_lang_ref_Reference::static_pending_offset; 3632 int java_lang_ref_Reference::number_of_fake_oop_fields; 3633 int java_lang_ref_SoftReference::timestamp_offset; 3634 int java_lang_ref_SoftReference::static_clock_offset; 3635 int java_lang_ClassLoader::parent_offset; 3636 int java_lang_System::static_in_offset; 3637 int java_lang_System::static_out_offset; 3638 int java_lang_System::static_err_offset; 3639 int java_lang_System::static_security_offset; 3640 int java_lang_StackTraceElement::declaringClass_offset; 3641 int java_lang_StackTraceElement::methodName_offset; 3642 int java_lang_StackTraceElement::fileName_offset; 3643 int java_lang_StackTraceElement::lineNumber_offset; 3644 int java_lang_StackTraceElement::moduleName_offset; 3645 int java_lang_StackTraceElement::moduleVersion_offset; 3646 int java_lang_StackFrameInfo::_declaringClass_offset; 3647 int java_lang_StackFrameInfo::_memberName_offset; 3648 int java_lang_StackFrameInfo::_bci_offset; 3649 int java_lang_StackFrameInfo::_version_offset; 3650 int java_lang_LiveStackFrameInfo::_monitors_offset; 3651 int java_lang_LiveStackFrameInfo::_locals_offset; 3652 int java_lang_LiveStackFrameInfo::_operands_offset; 3653 int java_lang_AssertionStatusDirectives::classes_offset; 3654 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3655 int java_lang_AssertionStatusDirectives::packages_offset; 3656 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3657 int java_lang_AssertionStatusDirectives::deflt_offset; 3658 int java_nio_Buffer::_limit_offset; 3659 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3660 int reflect_ConstantPool::_oop_offset; 3661 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3662 3663 3664 // Support for java_lang_StackTraceElement 3665 3666 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3667 element->obj_field_put(fileName_offset, value); 3668 } 3669 3670 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3671 element->obj_field_put(declaringClass_offset, value); 3672 } 3673 3674 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3675 element->obj_field_put(methodName_offset, value); 3676 } 3677 3678 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3679 element->int_field_put(lineNumber_offset, value); 3680 } 3681 3682 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3683 element->obj_field_put(moduleName_offset, value); 3684 } 3685 3686 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3687 element->obj_field_put(moduleVersion_offset, value); 3688 } 3689 3690 // Support for java_lang_StackFrameInfo 3691 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3692 element->obj_field_put(_declaringClass_offset, value); 3693 } 3694 3695 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3696 element->short_field_put(_version_offset, value); 3697 } 3698 3699 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3700 element->int_field_put(_bci_offset, value); 3701 } 3702 3703 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3704 element->obj_field_put(_monitors_offset, value); 3705 } 3706 3707 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3708 element->obj_field_put(_locals_offset, value); 3709 } 3710 3711 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3712 element->obj_field_put(_operands_offset, value); 3713 } 3714 3715 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3716 3717 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3718 o->obj_field_put(classes_offset, val); 3719 } 3720 3721 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3722 o->obj_field_put(classEnabled_offset, val); 3723 } 3724 3725 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3726 o->obj_field_put(packages_offset, val); 3727 } 3728 3729 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3730 o->obj_field_put(packageEnabled_offset, val); 3731 } 3732 3733 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3734 o->bool_field_put(deflt_offset, val); 3735 } 3736 3737 3738 // Support for intrinsification of java.nio.Buffer.checkIndex 3739 int java_nio_Buffer::limit_offset() { 3740 return _limit_offset; 3741 } 3742 3743 3744 void java_nio_Buffer::compute_offsets() { 3745 Klass* k = SystemDictionary::nio_Buffer_klass(); 3746 assert(k != NULL, "must be loaded in 1.4+"); 3747 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3748 } 3749 3750 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3751 if (_owner_offset != 0) return; 3752 3753 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3754 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3755 compute_offset(_owner_offset, k, 3756 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3757 } 3758 3759 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3760 assert(_owner_offset != 0, "Must be initialized"); 3761 return obj->obj_field(_owner_offset); 3762 } 3763 3764 // Compute hard-coded offsets 3765 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3766 // are not available to determine the offset_of_static_fields. 3767 void JavaClasses::compute_hard_coded_offsets() { 3768 const int x = heapOopSize; 3769 const int header = instanceOopDesc::base_offset_in_bytes(); 3770 3771 // Throwable Class 3772 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3773 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3774 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3775 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3776 3777 // java_lang_boxing_object 3778 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3779 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3780 3781 // java_lang_ref_Reference: 3782 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3783 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3784 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3785 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3786 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3787 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3788 // Artificial fields for java_lang_ref_Reference 3789 // The first field is for the discovered field added in 1.4 3790 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3791 3792 // java_lang_ref_SoftReference Class 3793 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3794 // Don't multiply static fields because they are always in wordSize units 3795 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3796 3797 // java_lang_ClassLoader 3798 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3799 3800 // java_lang_System 3801 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3802 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3803 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3804 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3805 3806 // java_lang_StackTraceElement 3807 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3808 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3809 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3810 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3811 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3812 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3813 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3814 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3815 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3816 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3817 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3818 3819 } 3820 3821 3822 // Compute non-hard-coded field offsets of all the classes in this file 3823 void JavaClasses::compute_offsets() { 3824 // java_lang_Class::compute_offsets was called earlier in bootstrap 3825 java_lang_ClassLoader::compute_offsets(); 3826 java_lang_Throwable::compute_offsets(); 3827 java_lang_Thread::compute_offsets(); 3828 java_lang_ThreadGroup::compute_offsets(); 3829 java_lang_invoke_MethodHandle::compute_offsets(); 3830 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3831 java_lang_invoke_MemberName::compute_offsets(); 3832 java_lang_invoke_LambdaForm::compute_offsets(); 3833 java_lang_invoke_MethodType::compute_offsets(); 3834 java_lang_invoke_CallSite::compute_offsets(); 3835 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3836 java_security_AccessControlContext::compute_offsets(); 3837 // Initialize reflection classes. The layouts of these classes 3838 // changed with the new reflection implementation in JDK 1.4, and 3839 // since the Universe doesn't know what JDK version it is until this 3840 // point we defer computation of these offsets until now. 3841 java_lang_reflect_AccessibleObject::compute_offsets(); 3842 java_lang_reflect_Method::compute_offsets(); 3843 java_lang_reflect_Constructor::compute_offsets(); 3844 java_lang_reflect_Field::compute_offsets(); 3845 java_nio_Buffer::compute_offsets(); 3846 reflect_ConstantPool::compute_offsets(); 3847 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3848 java_lang_reflect_Parameter::compute_offsets(); 3849 java_lang_reflect_Module::compute_offsets(); 3850 java_lang_StackFrameInfo::compute_offsets(); 3851 java_lang_LiveStackFrameInfo::compute_offsets(); 3852 3853 // generated interpreter code wants to know about the offsets we just computed: 3854 AbstractAssembler::update_delayed_values(); 3855 } 3856 3857 #ifndef PRODUCT 3858 3859 // These functions exist to assert the validity of hard-coded field offsets to guard 3860 // against changes in the class files 3861 3862 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3863 EXCEPTION_MARK; 3864 fieldDescriptor fd; 3865 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3866 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3867 instanceKlassHandle h_klass (THREAD, k); 3868 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3869 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3870 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3871 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3872 return false; 3873 } 3874 if (fd.is_static()) { 3875 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3876 return false; 3877 } 3878 if (fd.offset() == hardcoded_offset ) { 3879 return true; 3880 } else { 3881 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3882 klass_name, field_name, hardcoded_offset, fd.offset()); 3883 return false; 3884 } 3885 } 3886 3887 3888 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3889 EXCEPTION_MARK; 3890 fieldDescriptor fd; 3891 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3892 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3893 instanceKlassHandle h_klass (THREAD, k); 3894 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3895 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3896 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3897 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3898 return false; 3899 } 3900 if (!fd.is_static()) { 3901 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3902 return false; 3903 } 3904 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3905 return true; 3906 } else { 3907 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()); 3908 return false; 3909 } 3910 } 3911 3912 3913 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3914 EXCEPTION_MARK; 3915 fieldDescriptor fd; 3916 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3917 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3918 instanceKlassHandle h_klass (THREAD, k); 3919 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3920 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3921 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3922 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3923 return false; 3924 } 3925 if (!fd.is_static() || !fd.has_initial_value()) { 3926 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3927 return false; 3928 } 3929 if (!fd.initial_value_tag().is_int()) { 3930 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3931 return false; 3932 } 3933 jint field_value = fd.int_initial_value(); 3934 if (field_value == hardcoded_constant) { 3935 return true; 3936 } else { 3937 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); 3938 return false; 3939 } 3940 } 3941 3942 3943 // Check the hard-coded field offsets of all the classes in this file 3944 3945 void JavaClasses::check_offsets() { 3946 bool valid = true; 3947 HandleMark hm; 3948 3949 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3950 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3951 3952 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3953 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3954 3955 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3956 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3957 3958 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3959 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3960 3961 // java.lang.String 3962 3963 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3964 if (java_lang_String::has_hash_field()) { 3965 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3966 } 3967 if (java_lang_String::has_coder_field()) { 3968 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3969 } 3970 3971 // java.lang.Class 3972 3973 // Fake fields 3974 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3975 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3976 3977 // java.lang.Throwable 3978 3979 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3980 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3981 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3982 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 3983 3984 // Boxed primitive objects (java_lang_boxing_object) 3985 3986 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3987 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3988 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3989 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3990 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3991 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3992 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3993 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3994 3995 // java.lang.ClassLoader 3996 3997 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3998 3999 // java.lang.System 4000 4001 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4002 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4003 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4004 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4005 4006 // java.lang.StackTraceElement 4007 4008 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4009 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4010 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4011 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4012 4013 // java.lang.ref.Reference 4014 4015 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4016 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4017 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4018 // Fake field 4019 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4020 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 4021 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 4022 4023 // java.lang.ref.SoftReference 4024 4025 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4026 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4027 4028 // java.lang.AssertionStatusDirectives 4029 // 4030 // The CheckAssertionStatusDirectives boolean can be removed from here and 4031 // globals.hpp after the AssertionStatusDirectives class has been integrated 4032 // into merlin "for some time." Without it, the vm will fail with early 4033 // merlin builds. 4034 4035 if (CheckAssertionStatusDirectives) { 4036 const char* nm = "java/lang/AssertionStatusDirectives"; 4037 const char* sig = "[Ljava/lang/String;"; 4038 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4039 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4040 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4041 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4042 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4043 } 4044 4045 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4046 } 4047 4048 #endif // PRODUCT 4049 4050 int InjectedField::compute_offset() { 4051 InstanceKlass* ik = InstanceKlass::cast(klass()); 4052 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4053 if (!may_be_java && !fs.access_flags().is_internal()) { 4054 // Only look at injected fields 4055 continue; 4056 } 4057 if (fs.name() == name() && fs.signature() == signature()) { 4058 return fs.offset(); 4059 } 4060 } 4061 ResourceMark rm; 4062 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)" : ""); 4063 #ifndef PRODUCT 4064 ik->print(); 4065 tty->print_cr("all fields:"); 4066 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4067 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4068 } 4069 #endif //PRODUCT 4070 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4071 return -1; 4072 } 4073 4074 void javaClasses_init() { 4075 JavaClasses::compute_offsets(); 4076 JavaClasses::check_offsets(); 4077 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4078 }