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 // This check is too strict because the input symbol does not necessarily contain valid UTF8. 322 // For example, it may be created with arbitrary content via jni_FindClass. 323 /* 324 { 325 ResourceMark rm; 326 const char* expected = symbol->as_utf8(); 327 char* actual = as_utf8_string(h_obj()); 328 if (strncmp(expected, actual, utf8_len) != 0) { 329 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 330 ShouldNotReachHere(); 331 } 332 } 333 */ 334 #endif 335 336 return h_obj; 337 } 338 339 // Converts a C string to a Java String based on current encoding 340 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 341 assert(str != NULL, "bad arguments"); 342 343 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 344 static to_java_string_fn_t _to_java_string_fn = NULL; 345 346 if (_to_java_string_fn == NULL) { 347 void *lib_handle = os::native_java_library(); 348 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 349 if (_to_java_string_fn == NULL) { 350 fatal("NewStringPlatform missing"); 351 } 352 } 353 354 jstring js = NULL; 355 { JavaThread* thread = (JavaThread*)THREAD; 356 assert(thread->is_Java_thread(), "must be java thread"); 357 HandleMark hm(thread); 358 ThreadToNativeFromVM ttn(thread); 359 js = (_to_java_string_fn)(thread->jni_environment(), str); 360 } 361 return Handle(THREAD, JNIHandles::resolve(js)); 362 } 363 364 // Converts a Java String to a native C string that can be used for 365 // native OS calls. 366 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 367 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 368 static to_platform_string_fn_t _to_platform_string_fn = NULL; 369 370 if (_to_platform_string_fn == NULL) { 371 void *lib_handle = os::native_java_library(); 372 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 373 if (_to_platform_string_fn == NULL) { 374 fatal("GetStringPlatformChars missing"); 375 } 376 } 377 378 char *native_platform_string; 379 { JavaThread* thread = (JavaThread*)THREAD; 380 assert(thread->is_Java_thread(), "must be java thread"); 381 JNIEnv *env = thread->jni_environment(); 382 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 383 bool is_copy; 384 HandleMark hm(thread); 385 ThreadToNativeFromVM ttn(thread); 386 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 387 assert(is_copy == JNI_TRUE, "is_copy value changed"); 388 JNIHandles::destroy_local(js); 389 } 390 return native_platform_string; 391 } 392 393 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 394 oop obj = java_string(); 395 // Typical usage is to convert all '/' to '.' in string. 396 typeArrayOop value = java_lang_String::value(obj); 397 int length = java_lang_String::length(obj); 398 bool is_latin1 = java_lang_String::is_latin1(obj); 399 400 // First check if any from_char exist 401 int index; // Declared outside, used later 402 for (index = 0; index < length; index++) { 403 jchar c = !is_latin1 ? value->char_at(index) : 404 ((jchar) value->byte_at(index)) & 0xff; 405 if (c == from_char) { 406 break; 407 } 408 } 409 if (index == length) { 410 // No from_char, so do not copy. 411 return java_string; 412 } 413 414 // Check if result string will be latin1 415 bool to_is_latin1 = false; 416 417 // Replacement char must be latin1 418 if (CompactStrings && UNICODE::is_latin1(to_char)) { 419 if (is_latin1) { 420 // Source string is latin1 as well 421 to_is_latin1 = true; 422 } else if (!UNICODE::is_latin1(from_char)) { 423 // We are replacing an UTF16 char. Scan string to 424 // check if result can be latin1 encoded. 425 to_is_latin1 = true; 426 for (index = 0; index < length; index++) { 427 jchar c = value->char_at(index); 428 if (c != from_char && !UNICODE::is_latin1(c)) { 429 to_is_latin1 = false; 430 break; 431 } 432 } 433 } 434 } 435 436 // Create new UNICODE (or byte) buffer. Must handlize value because GC 437 // may happen during String and char array creation. 438 typeArrayHandle h_value(THREAD, value); 439 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 440 typeArrayOop from_buffer = h_value(); 441 typeArrayOop to_buffer = java_lang_String::value(string()); 442 443 // Copy contents 444 for (index = 0; index < length; index++) { 445 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 446 ((jchar) from_buffer->byte_at(index)) & 0xff; 447 if (c == from_char) { 448 c = to_char; 449 } 450 if (!to_is_latin1) { 451 to_buffer->char_at_put(index, c); 452 } else { 453 to_buffer->byte_at_put(index, (jbyte) c); 454 } 455 } 456 return string; 457 } 458 459 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 460 typeArrayOop value = java_lang_String::value(java_string); 461 length = java_lang_String::length(java_string); 462 bool is_latin1 = java_lang_String::is_latin1(java_string); 463 464 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 465 if (result != NULL) { 466 if (!is_latin1) { 467 for (int index = 0; index < length; index++) { 468 result[index] = value->char_at(index); 469 } 470 } else { 471 for (int index = 0; index < length; index++) { 472 result[index] = ((jchar) value->byte_at(index)) & 0xff; 473 } 474 } 475 } else { 476 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 477 } 478 return result; 479 } 480 481 unsigned int java_lang_String::hash_code(oop java_string) { 482 int length = java_lang_String::length(java_string); 483 // Zero length string will hash to zero with String.hashCode() function. 484 if (length == 0) return 0; 485 486 typeArrayOop value = java_lang_String::value(java_string); 487 bool is_latin1 = java_lang_String::is_latin1(java_string); 488 489 if (is_latin1) { 490 return java_lang_String::hash_code(value->byte_at_addr(0), length); 491 } else { 492 return java_lang_String::hash_code(value->char_at_addr(0), length); 493 } 494 } 495 496 char* java_lang_String::as_quoted_ascii(oop java_string) { 497 typeArrayOop value = java_lang_String::value(java_string); 498 int length = java_lang_String::length(java_string); 499 bool is_latin1 = java_lang_String::is_latin1(java_string); 500 501 if (length == 0) return NULL; 502 503 char* result; 504 int result_length; 505 if (!is_latin1) { 506 jchar* base = value->char_at_addr(0); 507 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 508 result = NEW_RESOURCE_ARRAY(char, result_length); 509 UNICODE::as_quoted_ascii(base, length, result, result_length); 510 } else { 511 jbyte* base = value->byte_at_addr(0); 512 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 513 result = NEW_RESOURCE_ARRAY(char, result_length); 514 UNICODE::as_quoted_ascii(base, length, result, result_length); 515 } 516 assert(result_length >= length + 1, "must not be shorter"); 517 assert(result_length == (int)strlen(result) + 1, "must match"); 518 return result; 519 } 520 521 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 522 oop obj = java_string(); 523 typeArrayOop value = java_lang_String::value(obj); 524 int length = java_lang_String::length(obj); 525 bool is_latin1 = java_lang_String::is_latin1(obj); 526 if (!is_latin1) { 527 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 528 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 529 return sym; 530 } else { 531 ResourceMark rm; 532 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 533 const char* base = UNICODE::as_utf8(position, length); 534 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 535 return sym; 536 } 537 } 538 539 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 540 typeArrayOop value = java_lang_String::value(java_string); 541 int length = java_lang_String::length(java_string); 542 bool is_latin1 = java_lang_String::is_latin1(java_string); 543 if (!is_latin1) { 544 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 545 return SymbolTable::probe_unicode(base, length); 546 } else { 547 ResourceMark rm; 548 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 549 const char* base = UNICODE::as_utf8(position, length); 550 return SymbolTable::probe(base, length); 551 } 552 } 553 554 int java_lang_String::utf8_length(oop java_string) { 555 typeArrayOop value = java_lang_String::value(java_string); 556 int length = java_lang_String::length(java_string); 557 bool is_latin1 = java_lang_String::is_latin1(java_string); 558 if (length == 0) { 559 return 0; 560 } 561 if (!is_latin1) { 562 return UNICODE::utf8_length(value->char_at_addr(0), length); 563 } else { 564 return UNICODE::utf8_length(value->byte_at_addr(0), length); 565 } 566 } 567 568 char* java_lang_String::as_utf8_string(oop java_string) { 569 typeArrayOop value = java_lang_String::value(java_string); 570 int length = java_lang_String::length(java_string); 571 bool is_latin1 = java_lang_String::is_latin1(java_string); 572 if (!is_latin1) { 573 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 574 return UNICODE::as_utf8(position, length); 575 } else { 576 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 577 return UNICODE::as_utf8(position, length); 578 } 579 } 580 581 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 582 typeArrayOop value = java_lang_String::value(java_string); 583 int length = java_lang_String::length(java_string); 584 bool is_latin1 = java_lang_String::is_latin1(java_string); 585 if (!is_latin1) { 586 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 587 return UNICODE::as_utf8(position, length, buf, buflen); 588 } else { 589 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 590 return UNICODE::as_utf8(position, length, buf, buflen); 591 } 592 } 593 594 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 595 typeArrayOop value = java_lang_String::value(java_string); 596 int length = java_lang_String::length(java_string); 597 assert(start + len <= length, "just checking"); 598 bool is_latin1 = java_lang_String::is_latin1(java_string); 599 if (!is_latin1) { 600 jchar* position = value->char_at_addr(start); 601 return UNICODE::as_utf8(position, len); 602 } else { 603 jbyte* position = value->byte_at_addr(start); 604 return UNICODE::as_utf8(position, len); 605 } 606 } 607 608 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 609 typeArrayOop value = java_lang_String::value(java_string); 610 int length = java_lang_String::length(java_string); 611 assert(start + len <= length, "just checking"); 612 bool is_latin1 = java_lang_String::is_latin1(java_string); 613 if (!is_latin1) { 614 jchar* position = value->char_at_addr(start); 615 return UNICODE::as_utf8(position, len, buf, buflen); 616 } else { 617 jbyte* position = value->byte_at_addr(start); 618 return UNICODE::as_utf8(position, len, buf, buflen); 619 } 620 } 621 622 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 623 assert(java_string->klass() == SystemDictionary::String_klass(), 624 "must be java_string"); 625 typeArrayOop value = java_lang_String::value(java_string); 626 int length = java_lang_String::length(java_string); 627 if (length != len) { 628 return false; 629 } 630 bool is_latin1 = java_lang_String::is_latin1(java_string); 631 if (!is_latin1) { 632 for (int i = 0; i < len; i++) { 633 if (value->char_at(i) != chars[i]) { 634 return false; 635 } 636 } 637 } else { 638 for (int i = 0; i < len; i++) { 639 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 640 return false; 641 } 642 } 643 } 644 return true; 645 } 646 647 bool java_lang_String::equals(oop str1, oop str2) { 648 assert(str1->klass() == SystemDictionary::String_klass(), 649 "must be java String"); 650 assert(str2->klass() == SystemDictionary::String_klass(), 651 "must be java String"); 652 typeArrayOop value1 = java_lang_String::value(str1); 653 int length1 = java_lang_String::length(str1); 654 bool is_latin1 = java_lang_String::is_latin1(str1); 655 typeArrayOop value2 = java_lang_String::value(str2); 656 int length2 = java_lang_String::length(str2); 657 bool is_latin2 = java_lang_String::is_latin1(str2); 658 659 if ((length1 != length2) || (is_latin1 != is_latin2)) { 660 // Strings of different size or with different 661 // coders are never equal. 662 return false; 663 } 664 int blength1 = value1->length(); 665 for (int i = 0; i < value1->length(); i++) { 666 if (value1->byte_at(i) != value2->byte_at(i)) { 667 return false; 668 } 669 } 670 return true; 671 } 672 673 void java_lang_String::print(oop java_string, outputStream* st) { 674 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 675 typeArrayOop value = java_lang_String::value(java_string); 676 677 if (value == NULL) { 678 // This can happen if, e.g., printing a String 679 // object before its initializer has been called 680 st->print("NULL"); 681 return; 682 } 683 684 int length = java_lang_String::length(java_string); 685 bool is_latin1 = java_lang_String::is_latin1(java_string); 686 687 st->print("\""); 688 for (int index = 0; index < length; index++) { 689 st->print("%c", (!is_latin1) ? value->char_at(index) : 690 ((jchar) value->byte_at(index)) & 0xff ); 691 } 692 st->print("\""); 693 } 694 695 696 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 697 assert(mirror.not_null() && fd->is_static(), "just checking"); 698 if (fd->has_initial_value()) { 699 BasicType t = fd->field_type(); 700 switch (t) { 701 case T_BYTE: 702 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 703 break; 704 case T_BOOLEAN: 705 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 706 break; 707 case T_CHAR: 708 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 709 break; 710 case T_SHORT: 711 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 712 break; 713 case T_INT: 714 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 715 break; 716 case T_FLOAT: 717 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 718 break; 719 case T_DOUBLE: 720 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 721 break; 722 case T_LONG: 723 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 724 break; 725 case T_OBJECT: 726 { 727 #ifdef ASSERT 728 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 729 assert(fd->signature() == sym, "just checking"); 730 #endif 731 oop string = fd->string_initial_value(CHECK); 732 mirror()->obj_field_put(fd->offset(), string); 733 } 734 break; 735 default: 736 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 737 "Illegal ConstantValue attribute in class file"); 738 } 739 } 740 } 741 742 743 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 744 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 745 746 // If the offset was read from the shared archive, it was fixed up already 747 if (!k->is_shared()) { 748 if (k->is_instance_klass()) { 749 // During bootstrap, java.lang.Class wasn't loaded so static field 750 // offsets were computed without the size added it. Go back and 751 // update all the static field offsets to included the size. 752 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 753 if (fs.access_flags().is_static()) { 754 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 755 fs.set_offset(real_offset); 756 } 757 } 758 } 759 } 760 create_mirror(k, Handle(NULL), Handle(NULL), Handle(NULL), CHECK); 761 } 762 763 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 764 Handle mirror, 765 Handle protection_domain, 766 TRAPS) { 767 // Allocate a simple java object for a lock. 768 // This needs to be a java object because during class initialization 769 // it can be held across a java call. 770 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 771 set_init_lock(mirror(), r); 772 773 // Set protection domain also 774 set_protection_domain(mirror(), protection_domain()); 775 776 // Initialize static fields 777 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 778 } 779 780 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 781 Handle module, Handle protection_domain, TRAPS) { 782 assert(k->java_mirror() == NULL, "should only assign mirror once"); 783 // Use this moment of initialization to cache modifier_flags also, 784 // to support Class.getModifiers(). Instance classes recalculate 785 // the cached flags after the class file is parsed, but before the 786 // class is put into the system dictionary. 787 int computed_modifiers = k->compute_modifier_flags(CHECK); 788 k->set_modifier_flags(computed_modifiers); 789 // Class_klass has to be loaded because it is used to allocate 790 // the mirror. 791 if (SystemDictionary::Class_klass_loaded()) { 792 // Allocate mirror (java.lang.Class instance) 793 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 794 795 // Setup indirection from mirror->klass 796 if (!k.is_null()) { 797 java_lang_Class::set_klass(mirror(), k()); 798 } 799 800 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 801 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 802 803 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 804 805 // It might also have a component mirror. This mirror must already exist. 806 if (k->is_array_klass()) { 807 Handle comp_mirror; 808 if (k->is_typeArray_klass()) { 809 BasicType type = TypeArrayKlass::cast(k())->element_type(); 810 comp_mirror = Universe::java_mirror(type); 811 } else { 812 assert(k->is_objArray_klass(), "Must be"); 813 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 814 assert(element_klass != NULL, "Must have an element klass"); 815 comp_mirror = element_klass->java_mirror(); 816 } 817 assert(comp_mirror.not_null(), "must have a mirror"); 818 819 // Two-way link between the array klass and its component mirror: 820 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 821 set_component_mirror(mirror(), comp_mirror()); 822 set_array_klass(comp_mirror(), k()); 823 } else { 824 assert(k->is_instance_klass(), "Must be"); 825 826 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 827 if (HAS_PENDING_EXCEPTION) { 828 // If any of the fields throws an exception like OOM remove the klass field 829 // from the mirror so GC doesn't follow it after the klass has been deallocated. 830 // This mirror looks like a primitive type, which logically it is because it 831 // it represents no class. 832 java_lang_Class::set_klass(mirror(), NULL); 833 return; 834 } 835 } 836 837 // set the classLoader field in the java_lang_Class instance 838 assert(class_loader() == k->class_loader(), "should be same"); 839 set_class_loader(mirror(), class_loader()); 840 841 // set the module field in the java_lang_Class instance 842 // This may be null during bootstrap but will get fixed up later on. 843 set_module(mirror(), module()); 844 845 // Setup indirection from klass->mirror last 846 // after any exceptions can happen during allocations. 847 if (!k.is_null()) { 848 k->set_java_mirror(mirror()); 849 } 850 851 // Keep list of classes needing java.base module fixup. 852 if (!ModuleEntryTable::javabase_defined()) { 853 if (fixup_module_field_list() == NULL) { 854 GrowableArray<Klass*>* list = 855 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 856 set_fixup_module_field_list(list); 857 } 858 k->class_loader_data()->inc_keep_alive(); 859 fixup_module_field_list()->push(k()); 860 } 861 } else { 862 if (fixup_mirror_list() == NULL) { 863 GrowableArray<Klass*>* list = 864 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 865 set_fixup_mirror_list(list); 866 } 867 fixup_mirror_list()->push(k()); 868 } 869 } 870 871 void java_lang_Class::fixup_module_field(KlassHandle k, Handle module) { 872 assert(_module_offset != 0, "must have been computed already"); 873 java_lang_Class::set_module(k->java_mirror(), module()); 874 } 875 876 int java_lang_Class::oop_size(oop java_class) { 877 assert(_oop_size_offset != 0, "must be set"); 878 int size = java_class->int_field(_oop_size_offset); 879 assert(size > 0, "Oop size must be greater than zero, not %d", size); 880 return size; 881 } 882 883 void java_lang_Class::set_oop_size(oop java_class, int size) { 884 assert(_oop_size_offset != 0, "must be set"); 885 assert(size > 0, "Oop size must be greater than zero, not %d", size); 886 java_class->int_field_put(_oop_size_offset, size); 887 } 888 889 int java_lang_Class::static_oop_field_count(oop java_class) { 890 assert(_static_oop_field_count_offset != 0, "must be set"); 891 return java_class->int_field(_static_oop_field_count_offset); 892 } 893 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 894 assert(_static_oop_field_count_offset != 0, "must be set"); 895 java_class->int_field_put(_static_oop_field_count_offset, size); 896 } 897 898 oop java_lang_Class::protection_domain(oop java_class) { 899 assert(_protection_domain_offset != 0, "must be set"); 900 return java_class->obj_field(_protection_domain_offset); 901 } 902 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 903 assert(_protection_domain_offset != 0, "must be set"); 904 java_class->obj_field_put(_protection_domain_offset, pd); 905 } 906 907 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 908 assert(_component_mirror_offset != 0, "must be set"); 909 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 910 } 911 oop java_lang_Class::component_mirror(oop java_class) { 912 assert(_component_mirror_offset != 0, "must be set"); 913 return java_class->obj_field(_component_mirror_offset); 914 } 915 916 oop java_lang_Class::init_lock(oop java_class) { 917 assert(_init_lock_offset != 0, "must be set"); 918 return java_class->obj_field(_init_lock_offset); 919 } 920 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 921 assert(_init_lock_offset != 0, "must be set"); 922 java_class->obj_field_put(_init_lock_offset, init_lock); 923 } 924 925 objArrayOop java_lang_Class::signers(oop java_class) { 926 assert(_signers_offset != 0, "must be set"); 927 return (objArrayOop)java_class->obj_field(_signers_offset); 928 } 929 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 930 assert(_signers_offset != 0, "must be set"); 931 java_class->obj_field_put(_signers_offset, (oop)signers); 932 } 933 934 935 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 936 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 937 if (_class_loader_offset != 0) { 938 java_class->obj_field_put(_class_loader_offset, loader); 939 } 940 } 941 942 oop java_lang_Class::class_loader(oop java_class) { 943 assert(_class_loader_offset != 0, "must be set"); 944 return java_class->obj_field(_class_loader_offset); 945 } 946 947 oop java_lang_Class::module(oop java_class) { 948 assert(_module_offset != 0, "must be set"); 949 return java_class->obj_field(_module_offset); 950 } 951 952 void java_lang_Class::set_module(oop java_class, oop module) { 953 assert(_module_offset != 0, "must be set"); 954 java_class->obj_field_put(_module_offset, module); 955 } 956 957 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 958 // This should be improved by adding a field at the Java level or by 959 // introducing a new VM klass (see comment in ClassFileParser) 960 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 961 if (type != T_VOID) { 962 Klass* aklass = Universe::typeArrayKlassObj(type); 963 assert(aklass != NULL, "correct bootstrap"); 964 set_array_klass(java_class, aklass); 965 } 966 #ifdef ASSERT 967 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 968 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 969 #endif 970 return java_class; 971 } 972 973 974 Klass* java_lang_Class::as_Klass(oop java_class) { 975 //%note memory_2 976 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 977 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 978 assert(k == NULL || k->is_klass(), "type check"); 979 return k; 980 } 981 982 983 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 984 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 985 java_class->metadata_field_put(_klass_offset, klass); 986 } 987 988 989 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 990 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 991 Symbol* name = NULL; 992 bool is_instance = false; 993 if (is_primitive(java_class)) { 994 name = vmSymbols::type_signature(primitive_type(java_class)); 995 } else { 996 Klass* k = as_Klass(java_class); 997 is_instance = k->is_instance_klass(); 998 name = k->name(); 999 } 1000 if (name == NULL) { 1001 st->print("<null>"); 1002 return; 1003 } 1004 if (is_instance) st->print("L"); 1005 st->write((char*) name->base(), (int) name->utf8_length()); 1006 if (is_instance) st->print(";"); 1007 } 1008 1009 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1010 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1011 Symbol* name; 1012 if (is_primitive(java_class)) { 1013 name = vmSymbols::type_signature(primitive_type(java_class)); 1014 // Because this can create a new symbol, the caller has to decrement 1015 // the refcount, so make adjustment here and below for symbols returned 1016 // that are not created or incremented due to a successful lookup. 1017 name->increment_refcount(); 1018 } else { 1019 Klass* k = as_Klass(java_class); 1020 if (!k->is_instance_klass()) { 1021 name = k->name(); 1022 name->increment_refcount(); 1023 } else { 1024 ResourceMark rm; 1025 const char* sigstr = k->signature_name(); 1026 int siglen = (int) strlen(sigstr); 1027 if (!intern_if_not_found) { 1028 name = SymbolTable::probe(sigstr, siglen); 1029 } else { 1030 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1031 } 1032 } 1033 } 1034 return name; 1035 } 1036 1037 // Returns the Java name for this Java mirror (Resource allocated) 1038 // See Klass::external_name(). 1039 // For primitive type Java mirrors, its type name is returned. 1040 const char* java_lang_Class::as_external_name(oop java_class) { 1041 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1042 const char* name = NULL; 1043 if (is_primitive(java_class)) { 1044 name = type2name(primitive_type(java_class)); 1045 } else { 1046 name = as_Klass(java_class)->external_name(); 1047 } 1048 if (name == NULL) { 1049 name = "<null>"; 1050 } 1051 return name; 1052 } 1053 1054 Klass* java_lang_Class::array_klass(oop java_class) { 1055 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1056 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1057 return k; 1058 } 1059 1060 1061 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1062 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1063 java_class->metadata_field_put(_array_klass_offset, klass); 1064 } 1065 1066 1067 bool java_lang_Class::is_primitive(oop java_class) { 1068 // should assert: 1069 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1070 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1071 1072 #ifdef ASSERT 1073 if (is_primitive) { 1074 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1075 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1076 "Should be either the T_VOID primitive or a java primitive"); 1077 } 1078 #endif 1079 1080 return is_primitive; 1081 } 1082 1083 1084 BasicType java_lang_Class::primitive_type(oop java_class) { 1085 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1086 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1087 BasicType type = T_VOID; 1088 if (ak != NULL) { 1089 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1090 type = ArrayKlass::cast(ak)->element_type(); 1091 } else { 1092 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1093 } 1094 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1095 return type; 1096 } 1097 1098 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1099 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1100 if (is_primitive(java_class)) { 1101 if (reference_klass != NULL) 1102 (*reference_klass) = NULL; 1103 return primitive_type(java_class); 1104 } else { 1105 if (reference_klass != NULL) 1106 (*reference_klass) = as_Klass(java_class); 1107 return T_OBJECT; 1108 } 1109 } 1110 1111 1112 oop java_lang_Class::primitive_mirror(BasicType t) { 1113 oop mirror = Universe::java_mirror(t); 1114 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1115 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1116 return mirror; 1117 } 1118 1119 bool java_lang_Class::offsets_computed = false; 1120 int java_lang_Class::classRedefinedCount_offset = -1; 1121 1122 void java_lang_Class::compute_offsets() { 1123 assert(!offsets_computed, "offsets should be initialized only once"); 1124 offsets_computed = true; 1125 1126 Klass* k = SystemDictionary::Class_klass(); 1127 // The classRedefinedCount field is only present starting in 1.5, 1128 // so don't go fatal. 1129 compute_optional_offset(classRedefinedCount_offset, 1130 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1131 1132 // Needs to be optional because the old build runs Queens during bootstrapping 1133 // and jdk8-9 doesn't have coordinated pushes yet. 1134 compute_optional_offset(_class_loader_offset, 1135 k, vmSymbols::classLoader_name(), 1136 vmSymbols::classloader_signature()); 1137 1138 compute_offset(_component_mirror_offset, 1139 k, vmSymbols::componentType_name(), 1140 vmSymbols::class_signature()); 1141 1142 compute_offset(_module_offset, 1143 k, vmSymbols::module_name(), 1144 vmSymbols::module_signature()); 1145 1146 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1147 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1148 // GC treats them the same. 1149 _init_lock_offset = _component_mirror_offset; 1150 1151 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1152 } 1153 1154 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1155 if (classRedefinedCount_offset == -1) { 1156 // If we don't have an offset for it then just return -1 as a marker. 1157 return -1; 1158 } 1159 1160 return the_class_mirror->int_field(classRedefinedCount_offset); 1161 } 1162 1163 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1164 if (classRedefinedCount_offset == -1) { 1165 // If we don't have an offset for it then nothing to set. 1166 return; 1167 } 1168 1169 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1170 } 1171 1172 1173 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1174 // platform thread structure, and a eetop offset which was used for thread 1175 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1176 // merged, so in the HotSpot VM we just use the eetop field for the thread 1177 // instead of the privateInfo_offset. 1178 // 1179 // Note: The stackSize field is only present starting in 1.4. 1180 1181 int java_lang_Thread::_name_offset = 0; 1182 int java_lang_Thread::_group_offset = 0; 1183 int java_lang_Thread::_contextClassLoader_offset = 0; 1184 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1185 int java_lang_Thread::_priority_offset = 0; 1186 int java_lang_Thread::_eetop_offset = 0; 1187 int java_lang_Thread::_daemon_offset = 0; 1188 int java_lang_Thread::_stillborn_offset = 0; 1189 int java_lang_Thread::_stackSize_offset = 0; 1190 int java_lang_Thread::_tid_offset = 0; 1191 int java_lang_Thread::_thread_status_offset = 0; 1192 int java_lang_Thread::_park_blocker_offset = 0; 1193 int java_lang_Thread::_park_event_offset = 0 ; 1194 1195 1196 void java_lang_Thread::compute_offsets() { 1197 assert(_group_offset == 0, "offsets should be initialized only once"); 1198 1199 Klass* k = SystemDictionary::Thread_klass(); 1200 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1201 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1202 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1203 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1204 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1205 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1206 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1207 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1208 // The stackSize field is only present starting in 1.4, so don't go fatal. 1209 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1210 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1211 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1212 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1213 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1214 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1215 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1216 vmSymbols::long_signature()); 1217 } 1218 1219 1220 JavaThread* java_lang_Thread::thread(oop java_thread) { 1221 return (JavaThread*)java_thread->address_field(_eetop_offset); 1222 } 1223 1224 1225 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1226 java_thread->address_field_put(_eetop_offset, (address)thread); 1227 } 1228 1229 1230 oop java_lang_Thread::name(oop java_thread) { 1231 return java_thread->obj_field(_name_offset); 1232 } 1233 1234 1235 void java_lang_Thread::set_name(oop java_thread, oop name) { 1236 java_thread->obj_field_put(_name_offset, name); 1237 } 1238 1239 1240 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1241 return (ThreadPriority)java_thread->int_field(_priority_offset); 1242 } 1243 1244 1245 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1246 java_thread->int_field_put(_priority_offset, priority); 1247 } 1248 1249 1250 oop java_lang_Thread::threadGroup(oop java_thread) { 1251 return java_thread->obj_field(_group_offset); 1252 } 1253 1254 1255 bool java_lang_Thread::is_stillborn(oop java_thread) { 1256 return java_thread->bool_field(_stillborn_offset) != 0; 1257 } 1258 1259 1260 // We never have reason to turn the stillborn bit off 1261 void java_lang_Thread::set_stillborn(oop java_thread) { 1262 java_thread->bool_field_put(_stillborn_offset, true); 1263 } 1264 1265 1266 bool java_lang_Thread::is_alive(oop java_thread) { 1267 JavaThread* thr = java_lang_Thread::thread(java_thread); 1268 return (thr != NULL); 1269 } 1270 1271 1272 bool java_lang_Thread::is_daemon(oop java_thread) { 1273 return java_thread->bool_field(_daemon_offset) != 0; 1274 } 1275 1276 1277 void java_lang_Thread::set_daemon(oop java_thread) { 1278 java_thread->bool_field_put(_daemon_offset, true); 1279 } 1280 1281 oop java_lang_Thread::context_class_loader(oop java_thread) { 1282 return java_thread->obj_field(_contextClassLoader_offset); 1283 } 1284 1285 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1286 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1287 } 1288 1289 1290 jlong java_lang_Thread::stackSize(oop java_thread) { 1291 if (_stackSize_offset > 0) { 1292 return java_thread->long_field(_stackSize_offset); 1293 } else { 1294 return 0; 1295 } 1296 } 1297 1298 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1299 void java_lang_Thread::set_thread_status(oop java_thread, 1300 java_lang_Thread::ThreadStatus status) { 1301 // The threadStatus is only present starting in 1.5 1302 if (_thread_status_offset > 0) { 1303 java_thread->int_field_put(_thread_status_offset, status); 1304 } 1305 } 1306 1307 // Read thread status value from threadStatus field in java.lang.Thread java class. 1308 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1309 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1310 JavaThread::current()->thread_state() == _thread_in_vm, 1311 "Java Thread is not running in vm"); 1312 // The threadStatus is only present starting in 1.5 1313 if (_thread_status_offset > 0) { 1314 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1315 } else { 1316 // All we can easily figure out is if it is alive, but that is 1317 // enough info for a valid unknown status. 1318 // These aren't restricted to valid set ThreadStatus values, so 1319 // use JVMTI values and cast. 1320 JavaThread* thr = java_lang_Thread::thread(java_thread); 1321 if (thr == NULL) { 1322 // the thread hasn't run yet or is in the process of exiting 1323 return NEW; 1324 } 1325 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1326 } 1327 } 1328 1329 1330 jlong java_lang_Thread::thread_id(oop java_thread) { 1331 // The thread ID field is only present starting in 1.5 1332 if (_tid_offset > 0) { 1333 return java_thread->long_field(_tid_offset); 1334 } else { 1335 return 0; 1336 } 1337 } 1338 1339 oop java_lang_Thread::park_blocker(oop java_thread) { 1340 assert(JDK_Version::current().supports_thread_park_blocker() && 1341 _park_blocker_offset != 0, "Must support parkBlocker field"); 1342 1343 if (_park_blocker_offset > 0) { 1344 return java_thread->obj_field(_park_blocker_offset); 1345 } 1346 1347 return NULL; 1348 } 1349 1350 jlong java_lang_Thread::park_event(oop java_thread) { 1351 if (_park_event_offset > 0) { 1352 return java_thread->long_field(_park_event_offset); 1353 } 1354 return 0; 1355 } 1356 1357 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1358 if (_park_event_offset > 0) { 1359 java_thread->long_field_put(_park_event_offset, ptr); 1360 return true; 1361 } 1362 return false; 1363 } 1364 1365 1366 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1367 assert(_thread_status_offset != 0, "Must have thread status"); 1368 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1369 switch (status) { 1370 case NEW : return "NEW"; 1371 case RUNNABLE : return "RUNNABLE"; 1372 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1373 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1374 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1375 case PARKED : return "WAITING (parking)"; 1376 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1377 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1378 case TERMINATED : return "TERMINATED"; 1379 default : return "UNKNOWN"; 1380 }; 1381 } 1382 int java_lang_ThreadGroup::_parent_offset = 0; 1383 int java_lang_ThreadGroup::_name_offset = 0; 1384 int java_lang_ThreadGroup::_threads_offset = 0; 1385 int java_lang_ThreadGroup::_groups_offset = 0; 1386 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1387 int java_lang_ThreadGroup::_destroyed_offset = 0; 1388 int java_lang_ThreadGroup::_daemon_offset = 0; 1389 int java_lang_ThreadGroup::_nthreads_offset = 0; 1390 int java_lang_ThreadGroup::_ngroups_offset = 0; 1391 1392 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1393 assert(java_thread_group->is_oop(), "thread group must be oop"); 1394 return java_thread_group->obj_field(_parent_offset); 1395 } 1396 1397 // ("name as oop" accessor is not necessary) 1398 1399 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1400 oop name = java_thread_group->obj_field(_name_offset); 1401 // ThreadGroup.name can be null 1402 if (name != NULL) { 1403 return java_lang_String::as_utf8_string(name); 1404 } 1405 return NULL; 1406 } 1407 1408 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1409 assert(java_thread_group->is_oop(), "thread group must be oop"); 1410 return java_thread_group->int_field(_nthreads_offset); 1411 } 1412 1413 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1414 oop threads = java_thread_group->obj_field(_threads_offset); 1415 assert(threads != NULL, "threadgroups should have threads"); 1416 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1417 return objArrayOop(threads); 1418 } 1419 1420 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1421 assert(java_thread_group->is_oop(), "thread group must be oop"); 1422 return java_thread_group->int_field(_ngroups_offset); 1423 } 1424 1425 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1426 oop groups = java_thread_group->obj_field(_groups_offset); 1427 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1428 return objArrayOop(groups); 1429 } 1430 1431 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1432 assert(java_thread_group->is_oop(), "thread group must be oop"); 1433 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1434 } 1435 1436 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1437 assert(java_thread_group->is_oop(), "thread group must be oop"); 1438 return java_thread_group->bool_field(_destroyed_offset) != 0; 1439 } 1440 1441 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1442 assert(java_thread_group->is_oop(), "thread group must be oop"); 1443 return java_thread_group->bool_field(_daemon_offset) != 0; 1444 } 1445 1446 void java_lang_ThreadGroup::compute_offsets() { 1447 assert(_parent_offset == 0, "offsets should be initialized only once"); 1448 1449 Klass* k = SystemDictionary::ThreadGroup_klass(); 1450 1451 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1452 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1453 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1454 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1455 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1456 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1457 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1458 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1459 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1460 } 1461 1462 1463 void java_lang_Throwable::compute_offsets() { 1464 Klass* k = SystemDictionary::Throwable_klass(); 1465 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1466 } 1467 1468 oop java_lang_Throwable::unassigned_stacktrace() { 1469 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1470 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1471 if (UseCompressedOops) { 1472 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1473 } else { 1474 return oopDesc::load_decode_heap_oop((oop*)addr); 1475 } 1476 } 1477 1478 oop java_lang_Throwable::backtrace(oop throwable) { 1479 return throwable->obj_field_acquire(backtrace_offset); 1480 } 1481 1482 1483 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1484 throwable->release_obj_field_put(backtrace_offset, value); 1485 } 1486 1487 int java_lang_Throwable::depth(oop throwable) { 1488 return throwable->int_field(depth_offset); 1489 } 1490 1491 void java_lang_Throwable::set_depth(oop throwable, int value) { 1492 throwable->int_field_put(depth_offset, value); 1493 } 1494 1495 oop java_lang_Throwable::message(Handle throwable) { 1496 return throwable->obj_field(detailMessage_offset); 1497 } 1498 1499 1500 // Return Symbol for detailed_message or NULL 1501 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1502 PRESERVE_EXCEPTION_MARK; // Keep original exception 1503 oop detailed_message = java_lang_Throwable::message(throwable); 1504 if (detailed_message != NULL) { 1505 return java_lang_String::as_symbol(detailed_message, THREAD); 1506 } 1507 return NULL; 1508 } 1509 1510 void java_lang_Throwable::set_message(oop throwable, oop value) { 1511 throwable->obj_field_put(detailMessage_offset, value); 1512 } 1513 1514 1515 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1516 throwable->obj_field_put(stackTrace_offset, st_element_array); 1517 } 1518 1519 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1520 set_stacktrace(throwable, NULL); 1521 } 1522 1523 1524 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1525 ResourceMark rm; 1526 Klass* k = throwable->klass(); 1527 assert(k != NULL, "just checking"); 1528 st->print("%s", k->external_name()); 1529 oop msg = message(throwable); 1530 if (msg != NULL) { 1531 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1532 } 1533 } 1534 1535 // After this many redefines, the stack trace is unreliable. 1536 const int MAX_VERSION = USHRT_MAX; 1537 1538 static inline bool version_matches(Method* method, int version) { 1539 assert(version < MAX_VERSION, "version is too big"); 1540 return method != NULL && (method->constants()->version() == version); 1541 } 1542 1543 1544 // This class provides a simple wrapper over the internal structure of 1545 // exception backtrace to insulate users of the backtrace from needing 1546 // to know what it looks like. 1547 class BacktraceBuilder: public StackObj { 1548 friend class BacktraceIterator; 1549 private: 1550 Handle _backtrace; 1551 objArrayOop _head; 1552 typeArrayOop _methods; 1553 typeArrayOop _bcis; 1554 objArrayOop _mirrors; 1555 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1556 int _index; 1557 NoSafepointVerifier _nsv; 1558 1559 enum { 1560 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1561 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1562 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1563 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1564 trace_next_offset = java_lang_Throwable::trace_next_offset, 1565 trace_size = java_lang_Throwable::trace_size, 1566 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1567 }; 1568 1569 // get info out of chunks 1570 static typeArrayOop get_methods(objArrayHandle chunk) { 1571 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1572 assert(methods != NULL, "method array should be initialized in backtrace"); 1573 return methods; 1574 } 1575 static typeArrayOop get_bcis(objArrayHandle chunk) { 1576 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1577 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1578 return bcis; 1579 } 1580 static objArrayOop get_mirrors(objArrayHandle chunk) { 1581 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1582 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1583 return mirrors; 1584 } 1585 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1586 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1587 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1588 return cprefs; 1589 } 1590 1591 public: 1592 1593 // constructor for new backtrace 1594 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1595 expand(CHECK); 1596 _backtrace = _head; 1597 _index = 0; 1598 } 1599 1600 BacktraceBuilder(objArrayHandle backtrace) { 1601 _methods = get_methods(backtrace); 1602 _bcis = get_bcis(backtrace); 1603 _mirrors = get_mirrors(backtrace); 1604 _cprefs = get_cprefs(backtrace); 1605 assert(_methods->length() == _bcis->length() && 1606 _methods->length() == _mirrors->length(), 1607 "method and source information arrays should match"); 1608 1609 // head is the preallocated backtrace 1610 _backtrace = _head = backtrace(); 1611 _index = 0; 1612 } 1613 1614 void expand(TRAPS) { 1615 objArrayHandle old_head(THREAD, _head); 1616 PauseNoSafepointVerifier pnsv(&_nsv); 1617 1618 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1619 objArrayHandle new_head(THREAD, head); 1620 1621 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1622 typeArrayHandle new_methods(THREAD, methods); 1623 1624 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1625 typeArrayHandle new_bcis(THREAD, bcis); 1626 1627 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1628 objArrayHandle new_mirrors(THREAD, mirrors); 1629 1630 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1631 typeArrayHandle new_cprefs(THREAD, cprefs); 1632 1633 if (!old_head.is_null()) { 1634 old_head->obj_at_put(trace_next_offset, new_head()); 1635 } 1636 new_head->obj_at_put(trace_methods_offset, new_methods()); 1637 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1638 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1639 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1640 1641 _head = new_head(); 1642 _methods = new_methods(); 1643 _bcis = new_bcis(); 1644 _mirrors = new_mirrors(); 1645 _cprefs = new_cprefs(); 1646 _index = 0; 1647 } 1648 1649 oop backtrace() { 1650 return _backtrace(); 1651 } 1652 1653 inline void push(Method* method, int bci, TRAPS) { 1654 // Smear the -1 bci to 0 since the array only holds unsigned 1655 // shorts. The later line number lookup would just smear the -1 1656 // to a 0 even if it could be recorded. 1657 if (bci == SynchronizationEntryBCI) bci = 0; 1658 1659 if (_index >= trace_chunk_size) { 1660 methodHandle mhandle(THREAD, method); 1661 expand(CHECK); 1662 method = mhandle(); 1663 } 1664 1665 _methods->short_at_put(_index, method->orig_method_idnum()); 1666 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1667 _cprefs->short_at_put(_index, method->name_index()); 1668 1669 // We need to save the mirrors in the backtrace to keep the class 1670 // from being unloaded while we still have this stack trace. 1671 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1672 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1673 _index++; 1674 } 1675 1676 }; 1677 1678 struct BacktraceElement : public StackObj { 1679 int _method_id; 1680 int _bci; 1681 int _version; 1682 int _cpref; 1683 Handle _mirror; 1684 BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) : 1685 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {} 1686 }; 1687 1688 class BacktraceIterator : public StackObj { 1689 int _index; 1690 objArrayHandle _result; 1691 objArrayHandle _mirrors; 1692 typeArrayHandle _methods; 1693 typeArrayHandle _bcis; 1694 typeArrayHandle _cprefs; 1695 1696 void init(objArrayHandle result, Thread* thread) { 1697 // Get method id, bci, version and mirror from chunk 1698 _result = result; 1699 if (_result.not_null()) { 1700 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1701 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1702 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1703 _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result)); 1704 _index = 0; 1705 } 1706 } 1707 public: 1708 BacktraceIterator(objArrayHandle result, Thread* thread) { 1709 init(result, thread); 1710 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1711 } 1712 1713 BacktraceElement next(Thread* thread) { 1714 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1715 _methods->short_at(_index), 1716 Backtrace::version_at(_bcis->int_at(_index)), 1717 Backtrace::bci_at(_bcis->int_at(_index)), 1718 _cprefs->short_at(_index)); 1719 _index++; 1720 1721 if (_index >= java_lang_Throwable::trace_chunk_size) { 1722 int next_offset = java_lang_Throwable::trace_next_offset; 1723 // Get next chunk 1724 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1725 init(result, thread); 1726 } 1727 return e; 1728 } 1729 1730 bool repeat() { 1731 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1732 } 1733 }; 1734 1735 1736 // Print stack trace element to resource allocated buffer 1737 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1738 int version, int bci, int cpref) { 1739 ResourceMark rm; 1740 1741 // Get strings and string lengths 1742 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1743 const char* klass_name = holder->external_name(); 1744 int buf_len = (int)strlen(klass_name); 1745 1746 Method* method = holder->method_with_orig_idnum(method_id, version); 1747 1748 // The method can be NULL if the requested class version is gone 1749 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1750 char* method_name = sym->as_C_string(); 1751 buf_len += (int)strlen(method_name); 1752 1753 char* source_file_name = NULL; 1754 Symbol* source = Backtrace::get_source_file_name(holder, version); 1755 if (source != NULL) { 1756 source_file_name = source->as_C_string(); 1757 buf_len += (int)strlen(source_file_name); 1758 } 1759 1760 char *module_name = NULL, *module_version = NULL; 1761 ModuleEntry* module = holder->module(); 1762 if (module->is_named()) { 1763 module_name = module->name()->as_C_string(); 1764 buf_len += (int)strlen(module_name); 1765 if (module->version() != NULL) { 1766 module_version = module->version()->as_C_string(); 1767 buf_len += (int)strlen(module_version); 1768 } 1769 } 1770 1771 // Allocate temporary buffer with extra space for formatting and line number 1772 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1773 1774 // Print stack trace line in buffer 1775 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1776 1777 // Print module information 1778 if (module_name != NULL) { 1779 if (module_version != NULL) { 1780 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1781 } else { 1782 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1783 } 1784 } 1785 1786 if (!version_matches(method, version)) { 1787 strcat(buf, "Redefined)"); 1788 } else { 1789 int line_number = Backtrace::get_line_number(method, bci); 1790 if (line_number == -2) { 1791 strcat(buf, "Native Method)"); 1792 } else { 1793 if (source_file_name != NULL && (line_number != -1)) { 1794 // Sourcename and linenumber 1795 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1796 } else if (source_file_name != NULL) { 1797 // Just sourcename 1798 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1799 } else { 1800 // Neither sourcename nor linenumber 1801 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1802 } 1803 CompiledMethod* nm = method->code(); 1804 if (WizardMode && nm != NULL) { 1805 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1806 } 1807 } 1808 } 1809 1810 st->print_cr("%s", buf); 1811 } 1812 1813 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1814 Handle mirror = method->method_holder()->java_mirror(); 1815 int method_id = method->orig_method_idnum(); 1816 int version = method->constants()->version(); 1817 int cpref = method->name_index(); 1818 print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref); 1819 } 1820 1821 /** 1822 * Print the throwable message and its stack trace plus all causes by walking the 1823 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1824 */ 1825 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1826 // First, print the message. 1827 print(throwable, st); 1828 st->cr(); 1829 1830 // Now print the stack trace. 1831 Thread* THREAD = Thread::current(); 1832 while (throwable.not_null()) { 1833 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1834 if (result.is_null()) { 1835 st->print_raw_cr("\t<<no stack trace available>>"); 1836 return; 1837 } 1838 BacktraceIterator iter(result, THREAD); 1839 1840 while (iter.repeat()) { 1841 BacktraceElement bte = iter.next(THREAD); 1842 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref); 1843 } 1844 { 1845 // Call getCause() which doesn't necessarily return the _cause field. 1846 EXCEPTION_MARK; 1847 JavaValue cause(T_OBJECT); 1848 JavaCalls::call_virtual(&cause, 1849 throwable, 1850 KlassHandle(THREAD, throwable->klass()), 1851 vmSymbols::getCause_name(), 1852 vmSymbols::void_throwable_signature(), 1853 THREAD); 1854 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1855 if (HAS_PENDING_EXCEPTION) { 1856 CLEAR_PENDING_EXCEPTION; 1857 throwable = Handle(); 1858 } else { 1859 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1860 if (throwable.not_null()) { 1861 st->print("Caused by: "); 1862 print(throwable, st); 1863 st->cr(); 1864 } 1865 } 1866 } 1867 } 1868 } 1869 1870 /** 1871 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1872 */ 1873 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1874 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1875 JavaValue result(T_VOID); 1876 JavaCalls::call_virtual(&result, 1877 throwable, 1878 KlassHandle(THREAD, SystemDictionary::Throwable_klass()), 1879 vmSymbols::printStackTrace_name(), 1880 vmSymbols::void_method_signature(), 1881 THREAD); 1882 } 1883 1884 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1885 if (!StackTraceInThrowable) return; 1886 ResourceMark rm(THREAD); 1887 1888 // Start out by clearing the backtrace for this object, in case the VM 1889 // runs out of memory while allocating the stack trace 1890 set_backtrace(throwable(), NULL); 1891 // Clear lazily constructed Java level stacktrace if refilling occurs 1892 // This is unnecessary in 1.7+ but harmless 1893 clear_stacktrace(throwable()); 1894 1895 int max_depth = MaxJavaStackTraceDepth; 1896 JavaThread* thread = (JavaThread*)THREAD; 1897 1898 BacktraceBuilder bt(CHECK); 1899 1900 // If there is no Java frame just return the method that was being called 1901 // with bci 0 1902 if (!thread->has_last_Java_frame()) { 1903 if (max_depth >= 1 && method() != NULL) { 1904 bt.push(method(), 0, CHECK); 1905 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1906 set_depth(throwable(), 1); 1907 set_backtrace(throwable(), bt.backtrace()); 1908 } 1909 return; 1910 } 1911 1912 // Instead of using vframe directly, this version of fill_in_stack_trace 1913 // basically handles everything by hand. This significantly improved the 1914 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1915 // See bug 6333838 for more details. 1916 // The "ASSERT" here is to verify this method generates the exactly same stack 1917 // trace as utilizing vframe. 1918 #ifdef ASSERT 1919 vframeStream st(thread); 1920 methodHandle st_method(THREAD, st.method()); 1921 #endif 1922 int total_count = 0; 1923 RegisterMap map(thread, false); 1924 int decode_offset = 0; 1925 CompiledMethod* nm = NULL; 1926 bool skip_fillInStackTrace_check = false; 1927 bool skip_throwableInit_check = false; 1928 bool skip_hidden = !ShowHiddenFrames; 1929 1930 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1931 Method* method = NULL; 1932 int bci = 0; 1933 1934 // Compiled java method case. 1935 if (decode_offset != 0) { 1936 DebugInfoReadStream stream(nm, decode_offset); 1937 decode_offset = stream.read_int(); 1938 method = (Method*)nm->metadata_at(stream.read_int()); 1939 bci = stream.read_bci(); 1940 } else { 1941 if (fr.is_first_frame()) break; 1942 address pc = fr.pc(); 1943 if (fr.is_interpreted_frame()) { 1944 address bcp = fr.interpreter_frame_bcp(); 1945 method = fr.interpreter_frame_method(); 1946 bci = method->bci_from(bcp); 1947 fr = fr.sender(&map); 1948 } else { 1949 CodeBlob* cb = fr.cb(); 1950 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1951 // but non nmethod 1952 fr = fr.sender(&map); 1953 if (cb == NULL || !cb->is_compiled()) { 1954 continue; 1955 } 1956 nm = cb->as_compiled_method(); 1957 if (nm->method()->is_native()) { 1958 method = nm->method(); 1959 bci = 0; 1960 } else { 1961 PcDesc* pd = nm->pc_desc_at(pc); 1962 decode_offset = pd->scope_decode_offset(); 1963 // if decode_offset is not equal to 0, it will execute the 1964 // "compiled java method case" at the beginning of the loop. 1965 continue; 1966 } 1967 } 1968 } 1969 #ifdef ASSERT 1970 assert(st_method() == method && st.bci() == bci, 1971 "Wrong stack trace"); 1972 st.next(); 1973 // vframeStream::method isn't GC-safe so store off a copy 1974 // of the Method* in case we GC. 1975 if (!st.at_end()) { 1976 st_method = st.method(); 1977 } 1978 #endif 1979 1980 // the format of the stacktrace will be: 1981 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1982 // - 0 or more <init> methods for the exception class (skipped) 1983 // - rest of the stack 1984 1985 if (!skip_fillInStackTrace_check) { 1986 if (method->name() == vmSymbols::fillInStackTrace_name() && 1987 throwable->is_a(method->method_holder())) { 1988 continue; 1989 } 1990 else { 1991 skip_fillInStackTrace_check = true; // gone past them all 1992 } 1993 } 1994 if (!skip_throwableInit_check) { 1995 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1996 1997 // skip <init> methods of the exception class and superclasses 1998 // This is simlar to classic VM. 1999 if (method->name() == vmSymbols::object_initializer_name() && 2000 throwable->is_a(method->method_holder())) { 2001 continue; 2002 } else { 2003 // there are none or we've seen them all - either way stop checking 2004 skip_throwableInit_check = true; 2005 } 2006 } 2007 if (method->is_hidden()) { 2008 if (skip_hidden) continue; 2009 } 2010 bt.push(method, bci, CHECK); 2011 total_count++; 2012 } 2013 2014 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2015 2016 // Put completed stack trace into throwable object 2017 set_backtrace(throwable(), bt.backtrace()); 2018 set_depth(throwable(), total_count); 2019 } 2020 2021 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2022 // No-op if stack trace is disabled 2023 if (!StackTraceInThrowable) { 2024 return; 2025 } 2026 2027 // Disable stack traces for some preallocated out of memory errors 2028 if (!Universe::should_fill_in_stack_trace(throwable)) { 2029 return; 2030 } 2031 2032 PRESERVE_EXCEPTION_MARK; 2033 2034 JavaThread* thread = JavaThread::active(); 2035 fill_in_stack_trace(throwable, method, thread); 2036 // ignore exceptions thrown during stack trace filling 2037 CLEAR_PENDING_EXCEPTION; 2038 } 2039 2040 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2041 // Allocate stack trace - backtrace is created but not filled in 2042 2043 // No-op if stack trace is disabled 2044 if (!StackTraceInThrowable) return; 2045 BacktraceBuilder bt(CHECK); // creates a backtrace 2046 set_backtrace(throwable(), bt.backtrace()); 2047 } 2048 2049 2050 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2051 // Fill in stack trace into preallocated backtrace (no GC) 2052 2053 // No-op if stack trace is disabled 2054 if (!StackTraceInThrowable) return; 2055 2056 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2057 2058 JavaThread* THREAD = JavaThread::current(); 2059 2060 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2061 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2062 2063 ResourceMark rm(THREAD); 2064 vframeStream st(THREAD); 2065 2066 BacktraceBuilder bt(backtrace); 2067 2068 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2069 // methods as preallocated errors aren't created by "java" code. 2070 2071 // fill in as much stack trace as possible 2072 int chunk_count = 0; 2073 for (;!st.at_end(); st.next()) { 2074 bt.push(st.method(), st.bci(), CHECK); 2075 chunk_count++; 2076 2077 // Bail-out for deep stacks 2078 if (chunk_count >= trace_chunk_size) break; 2079 } 2080 set_depth(throwable(), chunk_count); 2081 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2082 2083 // We support the Throwable immutability protocol defined for Java 7. 2084 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2085 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2086 } 2087 2088 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2089 objArrayHandle stack_trace_array_h, TRAPS) { 2090 2091 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2092 THROW(vmSymbols::java_lang_NullPointerException()); 2093 } 2094 2095 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2096 2097 if (stack_trace_array_h->length() != depth(throwable())) { 2098 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2099 } 2100 2101 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2102 BacktraceIterator iter(result, THREAD); 2103 2104 int index = 0; 2105 while (iter.repeat()) { 2106 BacktraceElement bte = iter.next(THREAD); 2107 2108 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2109 2110 if (stack_trace_element.is_null()) { 2111 THROW(vmSymbols::java_lang_NullPointerException()); 2112 } 2113 2114 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2115 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2116 2117 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2118 method, 2119 bte._version, 2120 bte._bci, 2121 bte._cpref, CHECK); 2122 } 2123 } 2124 2125 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2126 // Allocate java.lang.StackTraceElement instance 2127 Klass* k = SystemDictionary::StackTraceElement_klass(); 2128 assert(k != NULL, "must be loaded in 1.4+"); 2129 instanceKlassHandle ik (THREAD, k); 2130 if (ik->should_be_initialized()) { 2131 ik->initialize(CHECK_0); 2132 } 2133 2134 Handle element = ik->allocate_instance_handle(CHECK_0); 2135 2136 int cpref = method->name_index(); 2137 int version = method->constants()->version(); 2138 fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0); 2139 return element(); 2140 } 2141 2142 void java_lang_StackTraceElement::fill_in(Handle element, 2143 InstanceKlass* holder, const methodHandle& method, 2144 int version, int bci, int cpref, TRAPS) { 2145 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2146 2147 // Fill in class name 2148 ResourceMark rm(THREAD); 2149 const char* str = holder->external_name(); 2150 oop classname = StringTable::intern((char*) str, CHECK); 2151 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2152 2153 // The method can be NULL if the requested class version is gone 2154 Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref); 2155 2156 // Fill in method name 2157 oop methodname = StringTable::intern(sym, CHECK); 2158 java_lang_StackTraceElement::set_methodName(element(), methodname); 2159 2160 // Fill in module name and version 2161 ModuleEntry* module = holder->module(); 2162 if (module->is_named()) { 2163 oop module_name = StringTable::intern(module->name(), CHECK); 2164 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2165 oop module_version; 2166 if (module->version() != NULL) { 2167 module_version = StringTable::intern(module->version(), CHECK); 2168 } else { 2169 module_version = NULL; 2170 } 2171 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2172 } 2173 2174 if (!version_matches(method(), version)) { 2175 // The method was redefined, accurate line number information isn't available 2176 java_lang_StackTraceElement::set_fileName(element(), NULL); 2177 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2178 } else { 2179 // Fill in source file name and line number. 2180 Symbol* source = Backtrace::get_source_file_name(holder, version); 2181 if (ShowHiddenFrames && source == NULL) 2182 source = vmSymbols::unknown_class_name(); 2183 oop filename = StringTable::intern(source, CHECK); 2184 java_lang_StackTraceElement::set_fileName(element(), filename); 2185 2186 int line_number = Backtrace::get_line_number(method, bci); 2187 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2188 } 2189 } 2190 2191 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2192 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2193 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2194 // we should expand MemberName::name when Throwable uses StackTrace 2195 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2196 return method; 2197 } 2198 2199 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2200 // set Method* or mid/cpref 2201 oop mname = stackFrame->obj_field(_memberName_offset); 2202 InstanceKlass* ik = method->method_holder(); 2203 CallInfo info(method(), ik); 2204 MethodHandles::init_method_MemberName(mname, info); 2205 // set bci 2206 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2207 // method may be redefined; store the version 2208 int version = method->constants()->version(); 2209 assert((jushort)version == version, "version should be short"); 2210 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2211 } 2212 2213 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2214 ResourceMark rm(THREAD); 2215 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2216 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2217 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2218 2219 short version = stackFrame->short_field(_version_offset); 2220 short bci = stackFrame->short_field(_bci_offset); 2221 int cpref = method->name_index(); 2222 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK); 2223 } 2224 2225 void java_lang_StackFrameInfo::compute_offsets() { 2226 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2227 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2228 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2229 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2230 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2231 } 2232 2233 void java_lang_LiveStackFrameInfo::compute_offsets() { 2234 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2235 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2236 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2237 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2238 } 2239 2240 void java_lang_reflect_AccessibleObject::compute_offsets() { 2241 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2242 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2243 } 2244 2245 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2246 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2247 return (jboolean) reflect->bool_field(override_offset); 2248 } 2249 2250 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2251 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2252 reflect->bool_field_put(override_offset, (int) value); 2253 } 2254 2255 void java_lang_reflect_Method::compute_offsets() { 2256 Klass* k = SystemDictionary::reflect_Method_klass(); 2257 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2258 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2259 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2260 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2261 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2262 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2263 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2264 // The generic signature and annotations fields are only present in 1.5 2265 signature_offset = -1; 2266 annotations_offset = -1; 2267 parameter_annotations_offset = -1; 2268 annotation_default_offset = -1; 2269 type_annotations_offset = -1; 2270 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2271 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2272 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2273 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2274 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2275 } 2276 2277 Handle java_lang_reflect_Method::create(TRAPS) { 2278 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2279 Klass* klass = SystemDictionary::reflect_Method_klass(); 2280 // This class is eagerly initialized during VM initialization, since we keep a refence 2281 // to one of the methods 2282 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2283 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2284 } 2285 2286 oop java_lang_reflect_Method::clazz(oop reflect) { 2287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2288 return reflect->obj_field(clazz_offset); 2289 } 2290 2291 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2293 reflect->obj_field_put(clazz_offset, value); 2294 } 2295 2296 int java_lang_reflect_Method::slot(oop reflect) { 2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2298 return reflect->int_field(slot_offset); 2299 } 2300 2301 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2302 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2303 reflect->int_field_put(slot_offset, value); 2304 } 2305 2306 oop java_lang_reflect_Method::name(oop method) { 2307 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2308 return method->obj_field(name_offset); 2309 } 2310 2311 void java_lang_reflect_Method::set_name(oop method, oop value) { 2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2313 method->obj_field_put(name_offset, value); 2314 } 2315 2316 oop java_lang_reflect_Method::return_type(oop method) { 2317 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2318 return method->obj_field(returnType_offset); 2319 } 2320 2321 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2323 method->obj_field_put(returnType_offset, value); 2324 } 2325 2326 oop java_lang_reflect_Method::parameter_types(oop method) { 2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2328 return method->obj_field(parameterTypes_offset); 2329 } 2330 2331 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2333 method->obj_field_put(parameterTypes_offset, value); 2334 } 2335 2336 oop java_lang_reflect_Method::exception_types(oop method) { 2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2338 return method->obj_field(exceptionTypes_offset); 2339 } 2340 2341 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2343 method->obj_field_put(exceptionTypes_offset, value); 2344 } 2345 2346 int java_lang_reflect_Method::modifiers(oop method) { 2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2348 return method->int_field(modifiers_offset); 2349 } 2350 2351 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2353 method->int_field_put(modifiers_offset, value); 2354 } 2355 2356 bool java_lang_reflect_Method::has_signature_field() { 2357 return (signature_offset >= 0); 2358 } 2359 2360 oop java_lang_reflect_Method::signature(oop method) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 assert(has_signature_field(), "signature field must be present"); 2363 return method->obj_field(signature_offset); 2364 } 2365 2366 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 assert(has_signature_field(), "signature field must be present"); 2369 method->obj_field_put(signature_offset, value); 2370 } 2371 2372 bool java_lang_reflect_Method::has_annotations_field() { 2373 return (annotations_offset >= 0); 2374 } 2375 2376 oop java_lang_reflect_Method::annotations(oop method) { 2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2378 assert(has_annotations_field(), "annotations field must be present"); 2379 return method->obj_field(annotations_offset); 2380 } 2381 2382 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2383 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2384 assert(has_annotations_field(), "annotations field must be present"); 2385 method->obj_field_put(annotations_offset, value); 2386 } 2387 2388 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2389 return (parameter_annotations_offset >= 0); 2390 } 2391 2392 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2394 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2395 return method->obj_field(parameter_annotations_offset); 2396 } 2397 2398 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2399 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2400 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2401 method->obj_field_put(parameter_annotations_offset, value); 2402 } 2403 2404 bool java_lang_reflect_Method::has_annotation_default_field() { 2405 return (annotation_default_offset >= 0); 2406 } 2407 2408 oop java_lang_reflect_Method::annotation_default(oop method) { 2409 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2410 assert(has_annotation_default_field(), "annotation default field must be present"); 2411 return method->obj_field(annotation_default_offset); 2412 } 2413 2414 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2416 assert(has_annotation_default_field(), "annotation default field must be present"); 2417 method->obj_field_put(annotation_default_offset, value); 2418 } 2419 2420 bool java_lang_reflect_Method::has_type_annotations_field() { 2421 return (type_annotations_offset >= 0); 2422 } 2423 2424 oop java_lang_reflect_Method::type_annotations(oop method) { 2425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2426 assert(has_type_annotations_field(), "type_annotations field must be present"); 2427 return method->obj_field(type_annotations_offset); 2428 } 2429 2430 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2432 assert(has_type_annotations_field(), "type_annotations field must be present"); 2433 method->obj_field_put(type_annotations_offset, value); 2434 } 2435 2436 void java_lang_reflect_Constructor::compute_offsets() { 2437 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2438 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2439 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2440 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2441 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2442 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2443 // The generic signature and annotations fields are only present in 1.5 2444 signature_offset = -1; 2445 annotations_offset = -1; 2446 parameter_annotations_offset = -1; 2447 type_annotations_offset = -1; 2448 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2449 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2450 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2451 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2452 } 2453 2454 Handle java_lang_reflect_Constructor::create(TRAPS) { 2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2456 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2457 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2458 instanceKlassHandle klass (THREAD, k); 2459 // Ensure it is initialized 2460 klass->initialize(CHECK_NH); 2461 return klass->allocate_instance_handle(THREAD); 2462 } 2463 2464 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2466 return reflect->obj_field(clazz_offset); 2467 } 2468 2469 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2471 reflect->obj_field_put(clazz_offset, value); 2472 } 2473 2474 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2476 return constructor->obj_field(parameterTypes_offset); 2477 } 2478 2479 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2481 constructor->obj_field_put(parameterTypes_offset, value); 2482 } 2483 2484 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2486 return constructor->obj_field(exceptionTypes_offset); 2487 } 2488 2489 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2491 constructor->obj_field_put(exceptionTypes_offset, value); 2492 } 2493 2494 int java_lang_reflect_Constructor::slot(oop reflect) { 2495 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2496 return reflect->int_field(slot_offset); 2497 } 2498 2499 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2501 reflect->int_field_put(slot_offset, value); 2502 } 2503 2504 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2506 return constructor->int_field(modifiers_offset); 2507 } 2508 2509 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2511 constructor->int_field_put(modifiers_offset, value); 2512 } 2513 2514 bool java_lang_reflect_Constructor::has_signature_field() { 2515 return (signature_offset >= 0); 2516 } 2517 2518 oop java_lang_reflect_Constructor::signature(oop constructor) { 2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2520 assert(has_signature_field(), "signature field must be present"); 2521 return constructor->obj_field(signature_offset); 2522 } 2523 2524 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2525 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2526 assert(has_signature_field(), "signature field must be present"); 2527 constructor->obj_field_put(signature_offset, value); 2528 } 2529 2530 bool java_lang_reflect_Constructor::has_annotations_field() { 2531 return (annotations_offset >= 0); 2532 } 2533 2534 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2536 assert(has_annotations_field(), "annotations field must be present"); 2537 return constructor->obj_field(annotations_offset); 2538 } 2539 2540 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2541 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2542 assert(has_annotations_field(), "annotations field must be present"); 2543 constructor->obj_field_put(annotations_offset, value); 2544 } 2545 2546 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2547 return (parameter_annotations_offset >= 0); 2548 } 2549 2550 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2551 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2552 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2553 return method->obj_field(parameter_annotations_offset); 2554 } 2555 2556 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2558 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2559 method->obj_field_put(parameter_annotations_offset, value); 2560 } 2561 2562 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2563 return (type_annotations_offset >= 0); 2564 } 2565 2566 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2567 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2568 assert(has_type_annotations_field(), "type_annotations field must be present"); 2569 return constructor->obj_field(type_annotations_offset); 2570 } 2571 2572 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2573 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2574 assert(has_type_annotations_field(), "type_annotations field must be present"); 2575 constructor->obj_field_put(type_annotations_offset, value); 2576 } 2577 2578 void java_lang_reflect_Field::compute_offsets() { 2579 Klass* k = SystemDictionary::reflect_Field_klass(); 2580 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2581 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2582 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2583 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2584 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2585 // The generic signature and annotations fields are only present in 1.5 2586 signature_offset = -1; 2587 annotations_offset = -1; 2588 type_annotations_offset = -1; 2589 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2590 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2591 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2592 } 2593 2594 Handle java_lang_reflect_Field::create(TRAPS) { 2595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2596 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2597 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2598 instanceKlassHandle klass (THREAD, k); 2599 // Ensure it is initialized 2600 klass->initialize(CHECK_NH); 2601 return klass->allocate_instance_handle(THREAD); 2602 } 2603 2604 oop java_lang_reflect_Field::clazz(oop reflect) { 2605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2606 return reflect->obj_field(clazz_offset); 2607 } 2608 2609 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2611 reflect->obj_field_put(clazz_offset, value); 2612 } 2613 2614 oop java_lang_reflect_Field::name(oop field) { 2615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2616 return field->obj_field(name_offset); 2617 } 2618 2619 void java_lang_reflect_Field::set_name(oop field, oop value) { 2620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2621 field->obj_field_put(name_offset, value); 2622 } 2623 2624 oop java_lang_reflect_Field::type(oop field) { 2625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2626 return field->obj_field(type_offset); 2627 } 2628 2629 void java_lang_reflect_Field::set_type(oop field, oop value) { 2630 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2631 field->obj_field_put(type_offset, value); 2632 } 2633 2634 int java_lang_reflect_Field::slot(oop reflect) { 2635 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2636 return reflect->int_field(slot_offset); 2637 } 2638 2639 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2640 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2641 reflect->int_field_put(slot_offset, value); 2642 } 2643 2644 int java_lang_reflect_Field::modifiers(oop field) { 2645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2646 return field->int_field(modifiers_offset); 2647 } 2648 2649 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2651 field->int_field_put(modifiers_offset, value); 2652 } 2653 2654 bool java_lang_reflect_Field::has_signature_field() { 2655 return (signature_offset >= 0); 2656 } 2657 2658 oop java_lang_reflect_Field::signature(oop field) { 2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2660 assert(has_signature_field(), "signature field must be present"); 2661 return field->obj_field(signature_offset); 2662 } 2663 2664 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2665 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2666 assert(has_signature_field(), "signature field must be present"); 2667 field->obj_field_put(signature_offset, value); 2668 } 2669 2670 bool java_lang_reflect_Field::has_annotations_field() { 2671 return (annotations_offset >= 0); 2672 } 2673 2674 oop java_lang_reflect_Field::annotations(oop field) { 2675 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2676 assert(has_annotations_field(), "annotations field must be present"); 2677 return field->obj_field(annotations_offset); 2678 } 2679 2680 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2682 assert(has_annotations_field(), "annotations field must be present"); 2683 field->obj_field_put(annotations_offset, value); 2684 } 2685 2686 bool java_lang_reflect_Field::has_type_annotations_field() { 2687 return (type_annotations_offset >= 0); 2688 } 2689 2690 oop java_lang_reflect_Field::type_annotations(oop field) { 2691 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2692 assert(has_type_annotations_field(), "type_annotations field must be present"); 2693 return field->obj_field(type_annotations_offset); 2694 } 2695 2696 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2698 assert(has_type_annotations_field(), "type_annotations field must be present"); 2699 field->obj_field_put(type_annotations_offset, value); 2700 } 2701 2702 void reflect_ConstantPool::compute_offsets() { 2703 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2704 // This null test can be removed post beta 2705 if (k != NULL) { 2706 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2707 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2708 } 2709 } 2710 2711 void java_lang_reflect_Parameter::compute_offsets() { 2712 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2713 if(NULL != k) { 2714 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2715 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2716 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2717 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2718 } 2719 } 2720 2721 Handle java_lang_reflect_Parameter::create(TRAPS) { 2722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2723 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2724 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2725 instanceKlassHandle klass (THREAD, k); 2726 // Ensure it is initialized 2727 klass->initialize(CHECK_NH); 2728 return klass->allocate_instance_handle(THREAD); 2729 } 2730 2731 oop java_lang_reflect_Parameter::name(oop param) { 2732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2733 return param->obj_field(name_offset); 2734 } 2735 2736 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 param->obj_field_put(name_offset, value); 2739 } 2740 2741 int java_lang_reflect_Parameter::modifiers(oop param) { 2742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2743 return param->int_field(modifiers_offset); 2744 } 2745 2746 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2748 param->int_field_put(modifiers_offset, value); 2749 } 2750 2751 int java_lang_reflect_Parameter::index(oop param) { 2752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2753 return param->int_field(index_offset); 2754 } 2755 2756 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2757 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2758 param->int_field_put(index_offset, value); 2759 } 2760 2761 oop java_lang_reflect_Parameter::executable(oop param) { 2762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2763 return param->obj_field(executable_offset); 2764 } 2765 2766 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2768 param->obj_field_put(executable_offset, value); 2769 } 2770 2771 2772 int java_lang_reflect_Module::loader_offset; 2773 int java_lang_reflect_Module::name_offset; 2774 int java_lang_reflect_Module::_module_entry_offset = -1; 2775 2776 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) { 2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2778 2779 Symbol* name = vmSymbols::java_lang_reflect_Module(); 2780 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2781 instanceKlassHandle klass (THREAD, k); 2782 2783 Handle jlrmh = klass->allocate_instance_handle(CHECK_NH); 2784 JavaValue result(T_VOID); 2785 JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()), 2786 vmSymbols::object_initializer_name(), 2787 vmSymbols::java_lang_reflect_module_init_signature(), 2788 loader, module_name, CHECK_NH); 2789 return jlrmh; 2790 } 2791 2792 void java_lang_reflect_Module::compute_offsets() { 2793 Klass* k = SystemDictionary::reflect_Module_klass(); 2794 if(NULL != k) { 2795 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2796 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2797 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2798 } 2799 } 2800 2801 2802 oop java_lang_reflect_Module::loader(oop module) { 2803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2804 return module->obj_field(loader_offset); 2805 } 2806 2807 void java_lang_reflect_Module::set_loader(oop module, oop value) { 2808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2809 module->obj_field_put(loader_offset, value); 2810 } 2811 2812 oop java_lang_reflect_Module::name(oop module) { 2813 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2814 return module->obj_field(name_offset); 2815 } 2816 2817 void java_lang_reflect_Module::set_name(oop module, oop value) { 2818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2819 module->obj_field_put(name_offset, value); 2820 } 2821 2822 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) { 2823 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2824 assert(module != NULL, "module can't be null"); 2825 assert(module->is_oop(), "module must be oop"); 2826 2827 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2828 if (module_entry == NULL) { 2829 // If the inject field containing the ModuleEntry* is null then return the 2830 // class loader's unnamed module. 2831 oop loader = java_lang_reflect_Module::loader(module); 2832 Handle h_loader = Handle(THREAD, loader); 2833 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2834 return loader_cld->modules()->unnamed_module(); 2835 } 2836 return module_entry; 2837 } 2838 2839 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2840 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2841 assert(module != NULL, "module can't be null"); 2842 assert(module->is_oop(), "module must be oop"); 2843 module->address_field_put(_module_entry_offset, (address)module_entry); 2844 } 2845 2846 Handle reflect_ConstantPool::create(TRAPS) { 2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2848 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2849 instanceKlassHandle klass (THREAD, k); 2850 // Ensure it is initialized 2851 klass->initialize(CHECK_NH); 2852 return klass->allocate_instance_handle(THREAD); 2853 } 2854 2855 2856 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 oop mirror = value->pool_holder()->java_mirror(); 2859 // Save the mirror to get back the constant pool. 2860 reflect->obj_field_put(_oop_offset, mirror); 2861 } 2862 2863 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2865 2866 oop mirror = reflect->obj_field(_oop_offset); 2867 Klass* k = java_lang_Class::as_Klass(mirror); 2868 assert(k->is_instance_klass(), "Must be"); 2869 2870 // Get the constant pool back from the klass. Since class redefinition 2871 // merges the new constant pool into the old, this is essentially the 2872 // same constant pool as the original. If constant pool merging is 2873 // no longer done in the future, this will have to change to save 2874 // the original. 2875 return InstanceKlass::cast(k)->constants(); 2876 } 2877 2878 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2879 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2880 // This null test can be removed post beta 2881 if (k != NULL) { 2882 compute_offset(_base_offset, k, 2883 vmSymbols::base_name(), vmSymbols::object_signature()); 2884 } 2885 } 2886 2887 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2888 Klass* k = SystemDictionary::box_klass(type); 2889 if (k == NULL) return NULL; 2890 instanceKlassHandle h (THREAD, k); 2891 if (!h->is_initialized()) h->initialize(CHECK_0); 2892 return h->allocate_instance(THREAD); 2893 } 2894 2895 2896 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2897 oop box = initialize_and_allocate(type, CHECK_0); 2898 if (box == NULL) return NULL; 2899 switch (type) { 2900 case T_BOOLEAN: 2901 box->bool_field_put(value_offset, value->z); 2902 break; 2903 case T_CHAR: 2904 box->char_field_put(value_offset, value->c); 2905 break; 2906 case T_FLOAT: 2907 box->float_field_put(value_offset, value->f); 2908 break; 2909 case T_DOUBLE: 2910 box->double_field_put(long_value_offset, value->d); 2911 break; 2912 case T_BYTE: 2913 box->byte_field_put(value_offset, value->b); 2914 break; 2915 case T_SHORT: 2916 box->short_field_put(value_offset, value->s); 2917 break; 2918 case T_INT: 2919 box->int_field_put(value_offset, value->i); 2920 break; 2921 case T_LONG: 2922 box->long_field_put(long_value_offset, value->j); 2923 break; 2924 default: 2925 return NULL; 2926 } 2927 return box; 2928 } 2929 2930 2931 BasicType java_lang_boxing_object::basic_type(oop box) { 2932 if (box == NULL) return T_ILLEGAL; 2933 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2934 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2935 return T_ILLEGAL; 2936 return type; 2937 } 2938 2939 2940 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2941 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2942 switch (type) { 2943 case T_BOOLEAN: 2944 value->z = box->bool_field(value_offset); 2945 break; 2946 case T_CHAR: 2947 value->c = box->char_field(value_offset); 2948 break; 2949 case T_FLOAT: 2950 value->f = box->float_field(value_offset); 2951 break; 2952 case T_DOUBLE: 2953 value->d = box->double_field(long_value_offset); 2954 break; 2955 case T_BYTE: 2956 value->b = box->byte_field(value_offset); 2957 break; 2958 case T_SHORT: 2959 value->s = box->short_field(value_offset); 2960 break; 2961 case T_INT: 2962 value->i = box->int_field(value_offset); 2963 break; 2964 case T_LONG: 2965 value->j = box->long_field(long_value_offset); 2966 break; 2967 default: 2968 return T_ILLEGAL; 2969 } // end switch 2970 return type; 2971 } 2972 2973 2974 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2975 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2976 switch (type) { 2977 case T_BOOLEAN: 2978 box->bool_field_put(value_offset, value->z); 2979 break; 2980 case T_CHAR: 2981 box->char_field_put(value_offset, value->c); 2982 break; 2983 case T_FLOAT: 2984 box->float_field_put(value_offset, value->f); 2985 break; 2986 case T_DOUBLE: 2987 box->double_field_put(long_value_offset, value->d); 2988 break; 2989 case T_BYTE: 2990 box->byte_field_put(value_offset, value->b); 2991 break; 2992 case T_SHORT: 2993 box->short_field_put(value_offset, value->s); 2994 break; 2995 case T_INT: 2996 box->int_field_put(value_offset, value->i); 2997 break; 2998 case T_LONG: 2999 box->long_field_put(long_value_offset, value->j); 3000 break; 3001 default: 3002 return T_ILLEGAL; 3003 } // end switch 3004 return type; 3005 } 3006 3007 3008 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3009 switch (type) { 3010 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3011 case T_CHAR: st->print("%d", value->c); break; 3012 case T_BYTE: st->print("%d", value->b); break; 3013 case T_SHORT: st->print("%d", value->s); break; 3014 case T_INT: st->print("%d", value->i); break; 3015 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3016 case T_FLOAT: st->print("%f", value->f); break; 3017 case T_DOUBLE: st->print("%lf", value->d); break; 3018 default: st->print("type %d?", type); break; 3019 } 3020 } 3021 3022 3023 // Support for java_lang_ref_Reference 3024 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 3025 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3026 address addr = ik->static_field_addr(static_lock_offset); 3027 return (HeapWord*) addr; 3028 } 3029 3030 oop java_lang_ref_Reference::pending_list_lock() { 3031 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3032 address addr = ik->static_field_addr(static_lock_offset); 3033 if (UseCompressedOops) { 3034 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 3035 } else { 3036 return oopDesc::load_decode_heap_oop((oop*)addr); 3037 } 3038 } 3039 3040 HeapWord *java_lang_ref_Reference::pending_list_addr() { 3041 InstanceKlass* ik = SystemDictionary::Reference_klass(); 3042 address addr = ik->static_field_addr(static_pending_offset); 3043 // XXX This might not be HeapWord aligned, almost rather be char *. 3044 return (HeapWord*)addr; 3045 } 3046 3047 oop java_lang_ref_Reference::pending_list() { 3048 char *addr = (char *)pending_list_addr(); 3049 if (UseCompressedOops) { 3050 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 3051 } else { 3052 return oopDesc::load_decode_heap_oop((oop*)addr); 3053 } 3054 } 3055 3056 3057 // Support for java_lang_ref_SoftReference 3058 3059 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3060 return ref->long_field(timestamp_offset); 3061 } 3062 3063 jlong java_lang_ref_SoftReference::clock() { 3064 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3065 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3066 return *offset; 3067 } 3068 3069 void java_lang_ref_SoftReference::set_clock(jlong value) { 3070 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3071 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3072 *offset = value; 3073 } 3074 3075 // Support for java_lang_invoke_DirectMethodHandle 3076 3077 int java_lang_invoke_DirectMethodHandle::_member_offset; 3078 3079 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3080 oop member_name = NULL; 3081 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3082 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3083 if (is_dmh) { 3084 member_name = dmh->obj_field(member_offset_in_bytes()); 3085 } 3086 return member_name; 3087 } 3088 3089 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3090 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3091 if (klass_oop != NULL) { 3092 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3093 } 3094 } 3095 3096 // Support for java_lang_invoke_MethodHandle 3097 3098 int java_lang_invoke_MethodHandle::_type_offset; 3099 int java_lang_invoke_MethodHandle::_form_offset; 3100 3101 int java_lang_invoke_MemberName::_clazz_offset; 3102 int java_lang_invoke_MemberName::_name_offset; 3103 int java_lang_invoke_MemberName::_type_offset; 3104 int java_lang_invoke_MemberName::_flags_offset; 3105 int java_lang_invoke_MemberName::_vmtarget_offset; 3106 int java_lang_invoke_MemberName::_vmloader_offset; 3107 int java_lang_invoke_MemberName::_vmindex_offset; 3108 3109 int java_lang_invoke_LambdaForm::_vmentry_offset; 3110 3111 void java_lang_invoke_MethodHandle::compute_offsets() { 3112 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3113 if (klass_oop != NULL) { 3114 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3115 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3116 } 3117 } 3118 3119 void java_lang_invoke_MemberName::compute_offsets() { 3120 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3121 if (klass_oop != NULL) { 3122 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3123 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3124 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3125 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3126 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3127 } 3128 } 3129 3130 void java_lang_invoke_LambdaForm::compute_offsets() { 3131 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3132 if (klass_oop != NULL) { 3133 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3134 } 3135 } 3136 3137 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3138 return obj != NULL && is_subclass(obj->klass()); 3139 } 3140 3141 3142 oop java_lang_invoke_MethodHandle::type(oop mh) { 3143 return mh->obj_field(_type_offset); 3144 } 3145 3146 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3147 mh->obj_field_put(_type_offset, mtype); 3148 } 3149 3150 oop java_lang_invoke_MethodHandle::form(oop mh) { 3151 assert(_form_offset != 0, ""); 3152 return mh->obj_field(_form_offset); 3153 } 3154 3155 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3156 assert(_form_offset != 0, ""); 3157 mh->obj_field_put(_form_offset, lform); 3158 } 3159 3160 /// MemberName accessors 3161 3162 oop java_lang_invoke_MemberName::clazz(oop mname) { 3163 assert(is_instance(mname), "wrong type"); 3164 return mname->obj_field(_clazz_offset); 3165 } 3166 3167 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3168 assert(is_instance(mname), "wrong type"); 3169 mname->obj_field_put(_clazz_offset, clazz); 3170 } 3171 3172 oop java_lang_invoke_MemberName::name(oop mname) { 3173 assert(is_instance(mname), "wrong type"); 3174 return mname->obj_field(_name_offset); 3175 } 3176 3177 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3178 assert(is_instance(mname), "wrong type"); 3179 mname->obj_field_put(_name_offset, name); 3180 } 3181 3182 oop java_lang_invoke_MemberName::type(oop mname) { 3183 assert(is_instance(mname), "wrong type"); 3184 return mname->obj_field(_type_offset); 3185 } 3186 3187 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3188 assert(is_instance(mname), "wrong type"); 3189 mname->obj_field_put(_type_offset, type); 3190 } 3191 3192 int java_lang_invoke_MemberName::flags(oop mname) { 3193 assert(is_instance(mname), "wrong type"); 3194 return mname->int_field(_flags_offset); 3195 } 3196 3197 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3198 assert(is_instance(mname), "wrong type"); 3199 mname->int_field_put(_flags_offset, flags); 3200 } 3201 3202 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3203 assert(is_instance(mname), "wrong type"); 3204 return (Metadata*)mname->address_field(_vmtarget_offset); 3205 } 3206 3207 bool java_lang_invoke_MemberName::is_method(oop mname) { 3208 assert(is_instance(mname), "must be MemberName"); 3209 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3210 } 3211 3212 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3213 assert(is_instance(mname), "wrong type"); 3214 // check the type of the vmtarget 3215 oop dependency = NULL; 3216 if (ref != NULL) { 3217 switch (flags(mname) & (MN_IS_METHOD | 3218 MN_IS_CONSTRUCTOR | 3219 MN_IS_FIELD)) { 3220 case MN_IS_METHOD: 3221 case MN_IS_CONSTRUCTOR: 3222 assert(ref->is_method(), "should be a method"); 3223 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3224 break; 3225 case MN_IS_FIELD: 3226 assert(ref->is_klass(), "should be a class"); 3227 dependency = ((Klass*)ref)->java_mirror(); 3228 break; 3229 default: 3230 ShouldNotReachHere(); 3231 } 3232 } 3233 mname->address_field_put(_vmtarget_offset, (address)ref); 3234 // Add a reference to the loader (actually mirror because anonymous classes will not have 3235 // distinct loaders) to ensure the metadata is kept alive 3236 // This mirror may be different than the one in clazz field. 3237 mname->obj_field_put(_vmloader_offset, dependency); 3238 } 3239 3240 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3241 assert(is_instance(mname), "wrong type"); 3242 return (intptr_t) mname->address_field(_vmindex_offset); 3243 } 3244 3245 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3246 assert(is_instance(mname), "wrong type"); 3247 mname->address_field_put(_vmindex_offset, (address) index); 3248 } 3249 3250 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3251 assert(is_instance(lform), "wrong type"); 3252 return lform->obj_field(_vmentry_offset); 3253 } 3254 3255 3256 // Support for java_lang_invoke_MethodType 3257 3258 int java_lang_invoke_MethodType::_rtype_offset; 3259 int java_lang_invoke_MethodType::_ptypes_offset; 3260 3261 void java_lang_invoke_MethodType::compute_offsets() { 3262 Klass* k = SystemDictionary::MethodType_klass(); 3263 if (k != NULL) { 3264 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3265 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3266 } 3267 } 3268 3269 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3270 st->print("("); 3271 objArrayOop pts = ptypes(mt); 3272 for (int i = 0, limit = pts->length(); i < limit; i++) { 3273 java_lang_Class::print_signature(pts->obj_at(i), st); 3274 } 3275 st->print(")"); 3276 java_lang_Class::print_signature(rtype(mt), st); 3277 } 3278 3279 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3280 ResourceMark rm; 3281 stringStream buffer(128); 3282 print_signature(mt, &buffer); 3283 const char* sigstr = buffer.base(); 3284 int siglen = (int) buffer.size(); 3285 Symbol *name; 3286 if (!intern_if_not_found) { 3287 name = SymbolTable::probe(sigstr, siglen); 3288 } else { 3289 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3290 } 3291 return name; 3292 } 3293 3294 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3295 if (mt1 == mt2) 3296 return true; 3297 if (rtype(mt1) != rtype(mt2)) 3298 return false; 3299 if (ptype_count(mt1) != ptype_count(mt2)) 3300 return false; 3301 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3302 if (ptype(mt1, i) != ptype(mt2, i)) 3303 return false; 3304 } 3305 return true; 3306 } 3307 3308 oop java_lang_invoke_MethodType::rtype(oop mt) { 3309 assert(is_instance(mt), "must be a MethodType"); 3310 return mt->obj_field(_rtype_offset); 3311 } 3312 3313 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3314 assert(is_instance(mt), "must be a MethodType"); 3315 return (objArrayOop) mt->obj_field(_ptypes_offset); 3316 } 3317 3318 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3319 return ptypes(mt)->obj_at(idx); 3320 } 3321 3322 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3323 return ptypes(mt)->length(); 3324 } 3325 3326 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3327 objArrayOop pts = ptypes(mt); 3328 int count = pts->length(); 3329 int slots = 0; 3330 for (int i = 0; i < count; i++) { 3331 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3332 slots += type2size[bt]; 3333 } 3334 return slots; 3335 } 3336 3337 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3338 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3339 return type2size[bt]; 3340 } 3341 3342 3343 // Support for java_lang_invoke_CallSite 3344 3345 int java_lang_invoke_CallSite::_target_offset; 3346 int java_lang_invoke_CallSite::_context_offset; 3347 3348 void java_lang_invoke_CallSite::compute_offsets() { 3349 Klass* k = SystemDictionary::CallSite_klass(); 3350 if (k != NULL) { 3351 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3352 compute_offset(_context_offset, k, vmSymbols::context_name(), 3353 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3354 } 3355 } 3356 3357 oop java_lang_invoke_CallSite::context(oop call_site) { 3358 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3359 3360 oop dep_oop = call_site->obj_field(_context_offset); 3361 return dep_oop; 3362 } 3363 3364 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3365 3366 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3367 3368 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3369 Klass* k = SystemDictionary::Context_klass(); 3370 if (k != NULL) { 3371 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3372 } 3373 } 3374 3375 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3376 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3377 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3378 DependencyContext dep_ctx(vmdeps_addr); 3379 return dep_ctx; 3380 } 3381 3382 // Support for java_security_AccessControlContext 3383 3384 int java_security_AccessControlContext::_context_offset = 0; 3385 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3386 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3387 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3388 3389 void java_security_AccessControlContext::compute_offsets() { 3390 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3391 fieldDescriptor fd; 3392 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3393 3394 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3395 fatal("Invalid layout of java.security.AccessControlContext"); 3396 } 3397 _context_offset = fd.offset(); 3398 3399 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3400 fatal("Invalid layout of java.security.AccessControlContext"); 3401 } 3402 _privilegedContext_offset = fd.offset(); 3403 3404 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3405 fatal("Invalid layout of java.security.AccessControlContext"); 3406 } 3407 _isPrivileged_offset = fd.offset(); 3408 3409 // The offset may not be present for bootstrapping with older JDK. 3410 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3411 _isAuthorized_offset = fd.offset(); 3412 } 3413 } 3414 3415 3416 bool java_security_AccessControlContext::is_authorized(Handle context) { 3417 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3418 assert(_isAuthorized_offset != -1, "should be set"); 3419 return context->bool_field(_isAuthorized_offset) != 0; 3420 } 3421 3422 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3423 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3424 // Ensure klass is initialized 3425 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3426 // Allocate result 3427 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3428 // Fill in values 3429 result->obj_field_put(_context_offset, context()); 3430 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3431 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3432 // whitelist AccessControlContexts created by the JVM if present 3433 if (_isAuthorized_offset != -1) { 3434 result->bool_field_put(_isAuthorized_offset, true); 3435 } 3436 return result; 3437 } 3438 3439 3440 // Support for java_lang_ClassLoader 3441 3442 bool java_lang_ClassLoader::offsets_computed = false; 3443 int java_lang_ClassLoader::_loader_data_offset = -1; 3444 int java_lang_ClassLoader::parallelCapable_offset = -1; 3445 int java_lang_ClassLoader::unnamedModule_offset = -1; 3446 3447 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3448 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3449 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3450 } 3451 3452 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3453 return *java_lang_ClassLoader::loader_data_addr(loader); 3454 } 3455 3456 void java_lang_ClassLoader::compute_offsets() { 3457 assert(!offsets_computed, "offsets should be initialized only once"); 3458 offsets_computed = true; 3459 3460 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3461 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3462 compute_optional_offset(parallelCapable_offset, 3463 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3464 3465 compute_offset(unnamedModule_offset, 3466 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3467 3468 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3469 } 3470 3471 oop java_lang_ClassLoader::parent(oop loader) { 3472 assert(is_instance(loader), "loader must be oop"); 3473 return loader->obj_field(parent_offset); 3474 } 3475 3476 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3477 assert(is_instance(loader), "loader must be oop"); 3478 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3479 oop acl = loader; 3480 debug_only(jint loop_count = 0); 3481 // This loop taken verbatim from ClassLoader.java: 3482 do { 3483 acl = parent(acl); 3484 if (cl == acl) { 3485 return true; 3486 } 3487 assert(++loop_count > 0, "loop_count overflow"); 3488 } while (acl != NULL); 3489 return false; 3490 } 3491 3492 bool java_lang_ClassLoader::is_instance(oop obj) { 3493 return obj != NULL && is_subclass(obj->klass()); 3494 } 3495 3496 3497 // For class loader classes, parallelCapable defined 3498 // based on non-null field 3499 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3500 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3501 if (parallelCapable_offset == -1) { 3502 // Default for backward compatibility is false 3503 return false; 3504 } 3505 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3506 } 3507 3508 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3509 // Fix for 4474172; see evaluation for more details 3510 loader = non_reflection_class_loader(loader); 3511 3512 oop cl = SystemDictionary::java_system_loader(); 3513 while(cl != NULL) { 3514 if (cl == loader) return true; 3515 cl = parent(cl); 3516 } 3517 return false; 3518 } 3519 3520 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3521 if (loader != NULL) { 3522 // See whether this is one of the class loaders associated with 3523 // the generated bytecodes for reflection, and if so, "magically" 3524 // delegate to its parent to prevent class loading from occurring 3525 // in places where applications using reflection didn't expect it. 3526 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3527 // This might be null in non-1.4 JDKs 3528 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3529 return parent(loader); 3530 } 3531 } 3532 return loader; 3533 } 3534 3535 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3536 assert(is_instance(loader), "loader must be oop"); 3537 return loader->obj_field(unnamedModule_offset); 3538 } 3539 3540 // Support for java_lang_System 3541 int java_lang_System::in_offset_in_bytes() { 3542 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3543 } 3544 3545 3546 int java_lang_System::out_offset_in_bytes() { 3547 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3548 } 3549 3550 3551 int java_lang_System::err_offset_in_bytes() { 3552 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3553 } 3554 3555 3556 bool java_lang_System::has_security_manager() { 3557 InstanceKlass* ik = SystemDictionary::System_klass(); 3558 address addr = ik->static_field_addr(static_security_offset); 3559 if (UseCompressedOops) { 3560 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3561 } else { 3562 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3563 } 3564 } 3565 3566 int java_lang_Class::_klass_offset; 3567 int java_lang_Class::_array_klass_offset; 3568 int java_lang_Class::_oop_size_offset; 3569 int java_lang_Class::_static_oop_field_count_offset; 3570 int java_lang_Class::_class_loader_offset; 3571 int java_lang_Class::_module_offset; 3572 int java_lang_Class::_protection_domain_offset; 3573 int java_lang_Class::_component_mirror_offset; 3574 int java_lang_Class::_init_lock_offset; 3575 int java_lang_Class::_signers_offset; 3576 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3577 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3578 int java_lang_Throwable::backtrace_offset; 3579 int java_lang_Throwable::detailMessage_offset; 3580 int java_lang_Throwable::stackTrace_offset; 3581 int java_lang_Throwable::depth_offset; 3582 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3583 int java_lang_reflect_AccessibleObject::override_offset; 3584 int java_lang_reflect_Method::clazz_offset; 3585 int java_lang_reflect_Method::name_offset; 3586 int java_lang_reflect_Method::returnType_offset; 3587 int java_lang_reflect_Method::parameterTypes_offset; 3588 int java_lang_reflect_Method::exceptionTypes_offset; 3589 int java_lang_reflect_Method::slot_offset; 3590 int java_lang_reflect_Method::modifiers_offset; 3591 int java_lang_reflect_Method::signature_offset; 3592 int java_lang_reflect_Method::annotations_offset; 3593 int java_lang_reflect_Method::parameter_annotations_offset; 3594 int java_lang_reflect_Method::annotation_default_offset; 3595 int java_lang_reflect_Method::type_annotations_offset; 3596 int java_lang_reflect_Constructor::clazz_offset; 3597 int java_lang_reflect_Constructor::parameterTypes_offset; 3598 int java_lang_reflect_Constructor::exceptionTypes_offset; 3599 int java_lang_reflect_Constructor::slot_offset; 3600 int java_lang_reflect_Constructor::modifiers_offset; 3601 int java_lang_reflect_Constructor::signature_offset; 3602 int java_lang_reflect_Constructor::annotations_offset; 3603 int java_lang_reflect_Constructor::parameter_annotations_offset; 3604 int java_lang_reflect_Constructor::type_annotations_offset; 3605 int java_lang_reflect_Field::clazz_offset; 3606 int java_lang_reflect_Field::name_offset; 3607 int java_lang_reflect_Field::type_offset; 3608 int java_lang_reflect_Field::slot_offset; 3609 int java_lang_reflect_Field::modifiers_offset; 3610 int java_lang_reflect_Field::signature_offset; 3611 int java_lang_reflect_Field::annotations_offset; 3612 int java_lang_reflect_Field::type_annotations_offset; 3613 int java_lang_reflect_Parameter::name_offset; 3614 int java_lang_reflect_Parameter::modifiers_offset; 3615 int java_lang_reflect_Parameter::index_offset; 3616 int java_lang_reflect_Parameter::executable_offset; 3617 int java_lang_boxing_object::value_offset; 3618 int java_lang_boxing_object::long_value_offset; 3619 int java_lang_ref_Reference::referent_offset; 3620 int java_lang_ref_Reference::queue_offset; 3621 int java_lang_ref_Reference::next_offset; 3622 int java_lang_ref_Reference::discovered_offset; 3623 int java_lang_ref_Reference::static_lock_offset; 3624 int java_lang_ref_Reference::static_pending_offset; 3625 int java_lang_ref_Reference::number_of_fake_oop_fields; 3626 int java_lang_ref_SoftReference::timestamp_offset; 3627 int java_lang_ref_SoftReference::static_clock_offset; 3628 int java_lang_ClassLoader::parent_offset; 3629 int java_lang_System::static_in_offset; 3630 int java_lang_System::static_out_offset; 3631 int java_lang_System::static_err_offset; 3632 int java_lang_System::static_security_offset; 3633 int java_lang_StackTraceElement::declaringClass_offset; 3634 int java_lang_StackTraceElement::methodName_offset; 3635 int java_lang_StackTraceElement::fileName_offset; 3636 int java_lang_StackTraceElement::lineNumber_offset; 3637 int java_lang_StackTraceElement::moduleName_offset; 3638 int java_lang_StackTraceElement::moduleVersion_offset; 3639 int java_lang_StackFrameInfo::_declaringClass_offset; 3640 int java_lang_StackFrameInfo::_memberName_offset; 3641 int java_lang_StackFrameInfo::_bci_offset; 3642 int java_lang_StackFrameInfo::_version_offset; 3643 int java_lang_LiveStackFrameInfo::_monitors_offset; 3644 int java_lang_LiveStackFrameInfo::_locals_offset; 3645 int java_lang_LiveStackFrameInfo::_operands_offset; 3646 int java_lang_AssertionStatusDirectives::classes_offset; 3647 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3648 int java_lang_AssertionStatusDirectives::packages_offset; 3649 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3650 int java_lang_AssertionStatusDirectives::deflt_offset; 3651 int java_nio_Buffer::_limit_offset; 3652 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3653 int reflect_ConstantPool::_oop_offset; 3654 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3655 3656 3657 // Support for java_lang_StackTraceElement 3658 3659 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3660 element->obj_field_put(fileName_offset, value); 3661 } 3662 3663 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3664 element->obj_field_put(declaringClass_offset, value); 3665 } 3666 3667 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3668 element->obj_field_put(methodName_offset, value); 3669 } 3670 3671 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3672 element->int_field_put(lineNumber_offset, value); 3673 } 3674 3675 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3676 element->obj_field_put(moduleName_offset, value); 3677 } 3678 3679 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3680 element->obj_field_put(moduleVersion_offset, value); 3681 } 3682 3683 // Support for java_lang_StackFrameInfo 3684 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3685 element->obj_field_put(_declaringClass_offset, value); 3686 } 3687 3688 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3689 element->short_field_put(_version_offset, value); 3690 } 3691 3692 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3693 element->int_field_put(_bci_offset, value); 3694 } 3695 3696 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3697 element->obj_field_put(_monitors_offset, value); 3698 } 3699 3700 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3701 element->obj_field_put(_locals_offset, value); 3702 } 3703 3704 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3705 element->obj_field_put(_operands_offset, value); 3706 } 3707 3708 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3709 3710 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3711 o->obj_field_put(classes_offset, val); 3712 } 3713 3714 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3715 o->obj_field_put(classEnabled_offset, val); 3716 } 3717 3718 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3719 o->obj_field_put(packages_offset, val); 3720 } 3721 3722 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3723 o->obj_field_put(packageEnabled_offset, val); 3724 } 3725 3726 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3727 o->bool_field_put(deflt_offset, val); 3728 } 3729 3730 3731 // Support for intrinsification of java.nio.Buffer.checkIndex 3732 int java_nio_Buffer::limit_offset() { 3733 return _limit_offset; 3734 } 3735 3736 3737 void java_nio_Buffer::compute_offsets() { 3738 Klass* k = SystemDictionary::nio_Buffer_klass(); 3739 assert(k != NULL, "must be loaded in 1.4+"); 3740 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3741 } 3742 3743 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3744 if (_owner_offset != 0) return; 3745 3746 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3747 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3748 compute_offset(_owner_offset, k, 3749 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3750 } 3751 3752 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3753 assert(_owner_offset != 0, "Must be initialized"); 3754 return obj->obj_field(_owner_offset); 3755 } 3756 3757 // Compute hard-coded offsets 3758 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3759 // are not available to determine the offset_of_static_fields. 3760 void JavaClasses::compute_hard_coded_offsets() { 3761 const int x = heapOopSize; 3762 const int header = instanceOopDesc::base_offset_in_bytes(); 3763 3764 // Throwable Class 3765 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3766 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3767 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3768 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3769 3770 // java_lang_boxing_object 3771 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3772 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3773 3774 // java_lang_ref_Reference: 3775 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3776 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3777 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3778 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3779 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3780 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3781 // Artificial fields for java_lang_ref_Reference 3782 // The first field is for the discovered field added in 1.4 3783 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3784 3785 // java_lang_ref_SoftReference Class 3786 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3787 // Don't multiply static fields because they are always in wordSize units 3788 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3789 3790 // java_lang_ClassLoader 3791 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3792 3793 // java_lang_System 3794 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3795 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3796 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3797 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3798 3799 // java_lang_StackTraceElement 3800 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3801 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3802 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3803 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3804 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3805 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3806 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3807 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3808 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3809 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3810 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3811 3812 } 3813 3814 3815 // Compute non-hard-coded field offsets of all the classes in this file 3816 void JavaClasses::compute_offsets() { 3817 // java_lang_Class::compute_offsets was called earlier in bootstrap 3818 java_lang_ClassLoader::compute_offsets(); 3819 java_lang_Throwable::compute_offsets(); 3820 java_lang_Thread::compute_offsets(); 3821 java_lang_ThreadGroup::compute_offsets(); 3822 java_lang_invoke_MethodHandle::compute_offsets(); 3823 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3824 java_lang_invoke_MemberName::compute_offsets(); 3825 java_lang_invoke_LambdaForm::compute_offsets(); 3826 java_lang_invoke_MethodType::compute_offsets(); 3827 java_lang_invoke_CallSite::compute_offsets(); 3828 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3829 java_security_AccessControlContext::compute_offsets(); 3830 // Initialize reflection classes. The layouts of these classes 3831 // changed with the new reflection implementation in JDK 1.4, and 3832 // since the Universe doesn't know what JDK version it is until this 3833 // point we defer computation of these offsets until now. 3834 java_lang_reflect_AccessibleObject::compute_offsets(); 3835 java_lang_reflect_Method::compute_offsets(); 3836 java_lang_reflect_Constructor::compute_offsets(); 3837 java_lang_reflect_Field::compute_offsets(); 3838 java_nio_Buffer::compute_offsets(); 3839 reflect_ConstantPool::compute_offsets(); 3840 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3841 java_lang_reflect_Parameter::compute_offsets(); 3842 java_lang_reflect_Module::compute_offsets(); 3843 java_lang_StackFrameInfo::compute_offsets(); 3844 java_lang_LiveStackFrameInfo::compute_offsets(); 3845 3846 // generated interpreter code wants to know about the offsets we just computed: 3847 AbstractAssembler::update_delayed_values(); 3848 } 3849 3850 #ifndef PRODUCT 3851 3852 // These functions exist to assert the validity of hard-coded field offsets to guard 3853 // against changes in the class files 3854 3855 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3856 EXCEPTION_MARK; 3857 fieldDescriptor fd; 3858 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3859 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3860 instanceKlassHandle h_klass (THREAD, k); 3861 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3862 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3863 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3864 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3865 return false; 3866 } 3867 if (fd.is_static()) { 3868 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3869 return false; 3870 } 3871 if (fd.offset() == hardcoded_offset ) { 3872 return true; 3873 } else { 3874 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3875 klass_name, field_name, hardcoded_offset, fd.offset()); 3876 return false; 3877 } 3878 } 3879 3880 3881 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3882 EXCEPTION_MARK; 3883 fieldDescriptor fd; 3884 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3885 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3886 instanceKlassHandle h_klass (THREAD, k); 3887 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3888 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3889 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3890 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3891 return false; 3892 } 3893 if (!fd.is_static()) { 3894 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3895 return false; 3896 } 3897 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3898 return true; 3899 } else { 3900 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()); 3901 return false; 3902 } 3903 } 3904 3905 3906 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3907 EXCEPTION_MARK; 3908 fieldDescriptor fd; 3909 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3910 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3911 instanceKlassHandle h_klass (THREAD, k); 3912 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3913 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3914 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3915 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3916 return false; 3917 } 3918 if (!fd.is_static() || !fd.has_initial_value()) { 3919 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3920 return false; 3921 } 3922 if (!fd.initial_value_tag().is_int()) { 3923 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3924 return false; 3925 } 3926 jint field_value = fd.int_initial_value(); 3927 if (field_value == hardcoded_constant) { 3928 return true; 3929 } else { 3930 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); 3931 return false; 3932 } 3933 } 3934 3935 3936 // Check the hard-coded field offsets of all the classes in this file 3937 3938 void JavaClasses::check_offsets() { 3939 bool valid = true; 3940 HandleMark hm; 3941 3942 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3943 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3944 3945 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3946 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3947 3948 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3949 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3950 3951 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3952 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3953 3954 // java.lang.String 3955 3956 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3957 if (java_lang_String::has_hash_field()) { 3958 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3959 } 3960 if (java_lang_String::has_coder_field()) { 3961 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3962 } 3963 3964 // java.lang.Class 3965 3966 // Fake fields 3967 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3968 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3969 3970 // java.lang.Throwable 3971 3972 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3973 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3974 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3975 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 3976 3977 // Boxed primitive objects (java_lang_boxing_object) 3978 3979 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3980 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3981 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3982 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3983 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3984 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3985 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3986 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3987 3988 // java.lang.ClassLoader 3989 3990 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3991 3992 // java.lang.System 3993 3994 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3995 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3996 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3997 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3998 3999 // java.lang.StackTraceElement 4000 4001 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4002 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4003 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4004 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4005 4006 // java.lang.ref.Reference 4007 4008 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4009 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4010 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4011 // Fake field 4012 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4013 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 4014 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 4015 4016 // java.lang.ref.SoftReference 4017 4018 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4019 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4020 4021 // java.lang.AssertionStatusDirectives 4022 // 4023 // The CheckAssertionStatusDirectives boolean can be removed from here and 4024 // globals.hpp after the AssertionStatusDirectives class has been integrated 4025 // into merlin "for some time." Without it, the vm will fail with early 4026 // merlin builds. 4027 4028 if (CheckAssertionStatusDirectives) { 4029 const char* nm = "java/lang/AssertionStatusDirectives"; 4030 const char* sig = "[Ljava/lang/String;"; 4031 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4032 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4033 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4034 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4035 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4036 } 4037 4038 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4039 } 4040 4041 #endif // PRODUCT 4042 4043 int InjectedField::compute_offset() { 4044 InstanceKlass* ik = InstanceKlass::cast(klass()); 4045 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4046 if (!may_be_java && !fs.access_flags().is_internal()) { 4047 // Only look at injected fields 4048 continue; 4049 } 4050 if (fs.name() == name() && fs.signature() == signature()) { 4051 return fs.offset(); 4052 } 4053 } 4054 ResourceMark rm; 4055 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)" : ""); 4056 #ifndef PRODUCT 4057 ik->print(); 4058 tty->print_cr("all fields:"); 4059 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4060 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4061 } 4062 #endif //PRODUCT 4063 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4064 return -1; 4065 } 4066 4067 void javaClasses_init() { 4068 JavaClasses::compute_offsets(); 4069 JavaClasses::check_offsets(); 4070 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4071 }