1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.inline.hpp" 39 #include "oops/fieldStreams.hpp" 40 #include "oops/instanceKlass.hpp" 41 #include "oops/instanceMirrorKlass.hpp" 42 #include "oops/klass.hpp" 43 #include "oops/method.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/symbol.hpp" 47 #include "oops/typeArrayOop.hpp" 48 #include "runtime/fieldDescriptor.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/safepoint.hpp" 54 #include "runtime/thread.inline.hpp" 55 #include "runtime/vframe.hpp" 56 #include "utilities/preserveException.hpp" 57 58 #if INCLUDE_JVMCI 59 #include "jvmci/jvmciJavaClasses.hpp" 60 #endif 61 62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 64 65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 67 68 InjectedField JavaClasses::_injected_fields[] = { 69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 70 }; 71 72 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 73 return _injected_fields[id].compute_offset(); 74 } 75 76 77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 78 *field_count = 0; 79 80 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 81 if (sid == vmSymbols::NO_SID) { 82 // Only well known classes can inject fields 83 return NULL; 84 } 85 86 int count = 0; 87 int start = -1; 88 89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 91 count++; \ 92 if (start == -1) start = klass##_##name##_enum; \ 93 } 94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 95 #undef LOOKUP_INJECTED_FIELD 96 97 if (start != -1) { 98 *field_count = count; 99 return _injected_fields + start; 100 } 101 return NULL; 102 } 103 104 105 static bool find_field(InstanceKlass* ik, 106 Symbol* name_symbol, Symbol* signature_symbol, 107 fieldDescriptor* fd, 108 bool is_static = false, bool allow_super = false) { 109 if (allow_super || is_static) { 110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 111 } else { 112 return ik->find_local_field(name_symbol, signature_symbol, fd); 113 } 114 } 115 116 // Helpful routine for computing field offsets at run time rather than hardcoding them 117 static void 118 compute_offset(int &dest_offset, 119 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 120 bool is_static = false, bool allow_super = false) { 121 fieldDescriptor fd; 122 InstanceKlass* ik = InstanceKlass::cast(klass); 123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 124 ResourceMark rm; 125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 126 #ifndef PRODUCT 127 ik->print(); 128 tty->print_cr("all fields:"); 129 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 131 } 132 #endif //PRODUCT 133 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 134 } 135 dest_offset = fd.offset(); 136 } 137 138 // Same as above but for "optional" offsets that might not be present in certain JDK versions 139 static void 140 compute_optional_offset(int& dest_offset, 141 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 142 bool allow_super = false) { 143 fieldDescriptor fd; 144 InstanceKlass* ik = InstanceKlass::cast(klass); 145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 146 dest_offset = fd.offset(); 147 } 148 } 149 150 151 int java_lang_String::value_offset = 0; 152 int java_lang_String::hash_offset = 0; 153 int java_lang_String::coder_offset = 0; 154 155 bool java_lang_String::initialized = false; 156 157 bool java_lang_String::is_instance(oop obj) { 158 return is_instance_inlined(obj); 159 } 160 161 void java_lang_String::compute_offsets() { 162 assert(!initialized, "offsets should be initialized only once"); 163 164 Klass* k = SystemDictionary::String_klass(); 165 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 166 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 167 compute_optional_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 168 169 initialized = true; 170 } 171 172 class CompactStringsFixup : public FieldClosure { 173 private: 174 bool _value; 175 176 public: 177 CompactStringsFixup(bool value) : _value(value) {} 178 179 void do_field(fieldDescriptor* fd) { 180 if (fd->name() == vmSymbols::compact_strings_name()) { 181 oop mirror = fd->field_holder()->java_mirror(); 182 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 183 assert(mirror != NULL, "String must have mirror already"); 184 mirror->bool_field_put(fd->offset(), _value); 185 } 186 } 187 }; 188 189 void java_lang_String::set_compact_strings(bool value) { 190 CompactStringsFixup fix(value); 191 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 192 } 193 194 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 195 assert(initialized, "Must be initialized"); 196 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 197 198 // Create the String object first, so there's a chance that the String 199 // and the char array it points to end up in the same cache line. 200 oop obj; 201 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 202 203 // Create the char array. The String object must be handlized here 204 // because GC can happen as a result of the allocation attempt. 205 Handle h_obj(THREAD, obj); 206 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 207 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 208 209 // Point the String at the char array 210 obj = h_obj(); 211 set_value(obj, buffer); 212 // No need to zero the offset, allocation zero'ed the entire String object 213 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 214 return h_obj; 215 } 216 217 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 218 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 219 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 220 typeArrayOop buffer = value(h_obj()); 221 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 222 if (is_latin1) { 223 for (int index = 0; index < length; index++) { 224 buffer->byte_at_put(index, (jbyte)unicode[index]); 225 } 226 } else { 227 for (int index = 0; index < length; index++) { 228 buffer->char_at_put(index, unicode[index]); 229 } 230 } 231 232 #ifdef ASSERT 233 { 234 ResourceMark rm; 235 char* expected = UNICODE::as_utf8(unicode, length); 236 char* actual = as_utf8_string(h_obj()); 237 if (strcmp(expected, actual) != 0) { 238 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 239 ShouldNotReachHere(); 240 } 241 } 242 #endif 243 244 return h_obj; 245 } 246 247 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 248 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 249 return h_obj(); 250 } 251 252 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 253 if (utf8_str == NULL) { 254 return Handle(); 255 } 256 bool has_multibyte, is_latin1; 257 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 258 if (!CompactStrings) { 259 has_multibyte = true; 260 is_latin1 = false; 261 } 262 263 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 264 if (length > 0) { 265 if (!has_multibyte) { 266 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 267 } else if (is_latin1) { 268 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 269 } else { 270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 271 } 272 } 273 274 #ifdef ASSERT 275 // This check is too strict because the input string is not necessarily valid UTF8. 276 // For example, it may be created with arbitrary content via jni_NewStringUTF. 277 /* 278 { 279 ResourceMark rm; 280 const char* expected = utf8_str; 281 char* actual = as_utf8_string(h_obj()); 282 if (strcmp(expected, actual) != 0) { 283 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 284 ShouldNotReachHere(); 285 } 286 } 287 */ 288 #endif 289 290 return h_obj; 291 } 292 293 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 294 Handle h_obj = create_from_str(utf8_str, CHECK_0); 295 return h_obj(); 296 } 297 298 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 299 const char* utf8_str = (char*)symbol->bytes(); 300 int utf8_len = symbol->utf8_length(); 301 302 bool has_multibyte, is_latin1; 303 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 304 if (!CompactStrings) { 305 has_multibyte = true; 306 is_latin1 = false; 307 } 308 309 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 310 if (length > 0) { 311 if (!has_multibyte) { 312 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 313 } else if (is_latin1) { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 315 } else { 316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 317 } 318 } 319 320 #ifdef ASSERT 321 { 322 ResourceMark rm; 323 const char* expected = symbol->as_utf8(); 324 char* actual = as_utf8_string(h_obj()); 325 if (strncmp(expected, actual, utf8_len) != 0) { 326 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 327 ShouldNotReachHere(); 328 } 329 } 330 #endif 331 332 return h_obj; 333 } 334 335 // Converts a C string to a Java String based on current encoding 336 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 337 assert(str != NULL, "bad arguments"); 338 339 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 340 static to_java_string_fn_t _to_java_string_fn = NULL; 341 342 if (_to_java_string_fn == NULL) { 343 void *lib_handle = os::native_java_library(); 344 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 345 if (_to_java_string_fn == NULL) { 346 fatal("NewStringPlatform missing"); 347 } 348 } 349 350 jstring js = NULL; 351 { JavaThread* thread = (JavaThread*)THREAD; 352 assert(thread->is_Java_thread(), "must be java thread"); 353 HandleMark hm(thread); 354 ThreadToNativeFromVM ttn(thread); 355 js = (_to_java_string_fn)(thread->jni_environment(), str); 356 } 357 return Handle(THREAD, JNIHandles::resolve(js)); 358 } 359 360 // Converts a Java String to a native C string that can be used for 361 // native OS calls. 362 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 363 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 364 static to_platform_string_fn_t _to_platform_string_fn = NULL; 365 366 if (_to_platform_string_fn == NULL) { 367 void *lib_handle = os::native_java_library(); 368 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 369 if (_to_platform_string_fn == NULL) { 370 fatal("GetStringPlatformChars missing"); 371 } 372 } 373 374 char *native_platform_string; 375 { JavaThread* thread = (JavaThread*)THREAD; 376 assert(thread->is_Java_thread(), "must be java thread"); 377 JNIEnv *env = thread->jni_environment(); 378 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 379 bool is_copy; 380 HandleMark hm(thread); 381 ThreadToNativeFromVM ttn(thread); 382 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 383 assert(is_copy == JNI_TRUE, "is_copy value changed"); 384 JNIHandles::destroy_local(js); 385 } 386 return native_platform_string; 387 } 388 389 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 390 oop obj = java_string(); 391 // Typical usage is to convert all '/' to '.' in string. 392 typeArrayOop value = java_lang_String::value(obj); 393 int length = java_lang_String::length(obj); 394 bool is_latin1 = java_lang_String::is_latin1(obj); 395 396 // First check if any from_char exist 397 int index; // Declared outside, used later 398 for (index = 0; index < length; index++) { 399 jchar c = !is_latin1 ? value->char_at(index) : 400 ((jchar) value->byte_at(index)) & 0xff; 401 if (c == from_char) { 402 break; 403 } 404 } 405 if (index == length) { 406 // No from_char, so do not copy. 407 return java_string; 408 } 409 410 // Check if result string will be latin1 411 bool to_is_latin1 = false; 412 413 // Replacement char must be latin1 414 if (CompactStrings && UNICODE::is_latin1(to_char)) { 415 if (is_latin1) { 416 // Source string is latin1 as well 417 to_is_latin1 = true; 418 } else if (!UNICODE::is_latin1(from_char)) { 419 // We are replacing an UTF16 char. Scan string to 420 // check if result can be latin1 encoded. 421 to_is_latin1 = true; 422 for (index = 0; index < length; index++) { 423 jchar c = value->char_at(index); 424 if (c != from_char && !UNICODE::is_latin1(c)) { 425 to_is_latin1 = false; 426 break; 427 } 428 } 429 } 430 } 431 432 // Create new UNICODE (or byte) buffer. Must handlize value because GC 433 // may happen during String and char array creation. 434 typeArrayHandle h_value(THREAD, value); 435 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 436 typeArrayOop from_buffer = h_value(); 437 typeArrayOop to_buffer = java_lang_String::value(string()); 438 439 // Copy contents 440 for (index = 0; index < length; index++) { 441 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 442 ((jchar) from_buffer->byte_at(index)) & 0xff; 443 if (c == from_char) { 444 c = to_char; 445 } 446 if (!to_is_latin1) { 447 to_buffer->char_at_put(index, c); 448 } else { 449 to_buffer->byte_at_put(index, (jbyte) c); 450 } 451 } 452 return string; 453 } 454 455 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 456 typeArrayOop value = java_lang_String::value(java_string); 457 length = java_lang_String::length(java_string); 458 bool is_latin1 = java_lang_String::is_latin1(java_string); 459 460 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 461 if (result != NULL) { 462 if (!is_latin1) { 463 for (int index = 0; index < length; index++) { 464 result[index] = value->char_at(index); 465 } 466 } else { 467 for (int index = 0; index < length; index++) { 468 result[index] = ((jchar) value->byte_at(index)) & 0xff; 469 } 470 } 471 } else { 472 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 473 } 474 return result; 475 } 476 477 unsigned int java_lang_String::hash_code(oop java_string) { 478 int length = java_lang_String::length(java_string); 479 // Zero length string will hash to zero with String.hashCode() function. 480 if (length == 0) return 0; 481 482 typeArrayOop value = java_lang_String::value(java_string); 483 bool is_latin1 = java_lang_String::is_latin1(java_string); 484 485 if (is_latin1) { 486 return java_lang_String::hash_code(value->byte_at_addr(0), length); 487 } else { 488 return java_lang_String::hash_code(value->char_at_addr(0), length); 489 } 490 } 491 492 char* java_lang_String::as_quoted_ascii(oop java_string) { 493 typeArrayOop value = java_lang_String::value(java_string); 494 int length = java_lang_String::length(java_string); 495 bool is_latin1 = java_lang_String::is_latin1(java_string); 496 497 if (length == 0) return NULL; 498 499 char* result; 500 int result_length; 501 if (!is_latin1) { 502 jchar* base = value->char_at_addr(0); 503 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 504 result = NEW_RESOURCE_ARRAY(char, result_length); 505 UNICODE::as_quoted_ascii(base, length, result, result_length); 506 } else { 507 jbyte* base = value->byte_at_addr(0); 508 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 509 result = NEW_RESOURCE_ARRAY(char, result_length); 510 UNICODE::as_quoted_ascii(base, length, result, result_length); 511 } 512 assert(result_length >= length + 1, "must not be shorter"); 513 assert(result_length == (int)strlen(result) + 1, "must match"); 514 return result; 515 } 516 517 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 518 oop obj = java_string(); 519 typeArrayOop value = java_lang_String::value(obj); 520 int length = java_lang_String::length(obj); 521 bool is_latin1 = java_lang_String::is_latin1(obj); 522 if (!is_latin1) { 523 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 524 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 525 return sym; 526 } else { 527 ResourceMark rm; 528 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 529 const char* base = UNICODE::as_utf8(position, length); 530 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 531 return sym; 532 } 533 } 534 535 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 536 typeArrayOop value = java_lang_String::value(java_string); 537 int length = java_lang_String::length(java_string); 538 bool is_latin1 = java_lang_String::is_latin1(java_string); 539 if (!is_latin1) { 540 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 541 return SymbolTable::probe_unicode(base, length); 542 } else { 543 ResourceMark rm; 544 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 545 const char* base = UNICODE::as_utf8(position, length); 546 return SymbolTable::probe(base, length); 547 } 548 } 549 550 int java_lang_String::utf8_length(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 if (length == 0) { 555 return 0; 556 } 557 if (!is_latin1) { 558 return UNICODE::utf8_length(value->char_at_addr(0), length); 559 } else { 560 return UNICODE::utf8_length(value->byte_at_addr(0), length); 561 } 562 } 563 564 char* java_lang_String::as_utf8_string(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 570 return UNICODE::as_utf8(position, length); 571 } else { 572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 573 return UNICODE::as_utf8(position, length); 574 } 575 } 576 577 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 578 typeArrayOop value = java_lang_String::value(java_string); 579 int length = java_lang_String::length(java_string); 580 bool is_latin1 = java_lang_String::is_latin1(java_string); 581 if (!is_latin1) { 582 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 583 return UNICODE::as_utf8(position, length, buf, buflen); 584 } else { 585 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 586 return UNICODE::as_utf8(position, length, buf, buflen); 587 } 588 } 589 590 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 591 typeArrayOop value = java_lang_String::value(java_string); 592 int length = java_lang_String::length(java_string); 593 assert(start + len <= length, "just checking"); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* position = value->char_at_addr(start); 597 return UNICODE::as_utf8(position, len); 598 } else { 599 jbyte* position = value->byte_at_addr(start); 600 return UNICODE::as_utf8(position, len); 601 } 602 } 603 604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 605 typeArrayOop value = java_lang_String::value(java_string); 606 int length = java_lang_String::length(java_string); 607 assert(start + len <= length, "just checking"); 608 bool is_latin1 = java_lang_String::is_latin1(java_string); 609 if (!is_latin1) { 610 jchar* position = value->char_at_addr(start); 611 return UNICODE::as_utf8(position, len, buf, buflen); 612 } else { 613 jbyte* position = value->byte_at_addr(start); 614 return UNICODE::as_utf8(position, len, buf, buflen); 615 } 616 } 617 618 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 619 assert(java_string->klass() == SystemDictionary::String_klass(), 620 "must be java_string"); 621 typeArrayOop value = java_lang_String::value(java_string); 622 int length = java_lang_String::length(java_string); 623 if (length != len) { 624 return false; 625 } 626 bool is_latin1 = java_lang_String::is_latin1(java_string); 627 if (!is_latin1) { 628 for (int i = 0; i < len; i++) { 629 if (value->char_at(i) != chars[i]) { 630 return false; 631 } 632 } 633 } else { 634 for (int i = 0; i < len; i++) { 635 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 636 return false; 637 } 638 } 639 } 640 return true; 641 } 642 643 bool java_lang_String::equals(oop str1, oop str2) { 644 assert(str1->klass() == SystemDictionary::String_klass(), 645 "must be java String"); 646 assert(str2->klass() == SystemDictionary::String_klass(), 647 "must be java String"); 648 typeArrayOop value1 = java_lang_String::value(str1); 649 int length1 = java_lang_String::length(str1); 650 bool is_latin1 = java_lang_String::is_latin1(str1); 651 typeArrayOop value2 = java_lang_String::value(str2); 652 int length2 = java_lang_String::length(str2); 653 bool is_latin2 = java_lang_String::is_latin1(str2); 654 655 if ((length1 != length2) || (is_latin1 != is_latin2)) { 656 // Strings of different size or with different 657 // coders are never equal. 658 return false; 659 } 660 int blength1 = value1->length(); 661 for (int i = 0; i < value1->length(); i++) { 662 if (value1->byte_at(i) != value2->byte_at(i)) { 663 return false; 664 } 665 } 666 return true; 667 } 668 669 void java_lang_String::print(oop java_string, outputStream* st) { 670 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 671 typeArrayOop value = java_lang_String::value(java_string); 672 673 if (value == NULL) { 674 // This can happen if, e.g., printing a String 675 // object before its initializer has been called 676 st->print("NULL"); 677 return; 678 } 679 680 int length = java_lang_String::length(java_string); 681 bool is_latin1 = java_lang_String::is_latin1(java_string); 682 683 st->print("\""); 684 for (int index = 0; index < length; index++) { 685 st->print("%c", (!is_latin1) ? value->char_at(index) : 686 ((jchar) value->byte_at(index)) & 0xff ); 687 } 688 st->print("\""); 689 } 690 691 692 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 693 assert(mirror.not_null() && fd->is_static(), "just checking"); 694 if (fd->has_initial_value()) { 695 BasicType t = fd->field_type(); 696 switch (t) { 697 case T_BYTE: 698 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 699 break; 700 case T_BOOLEAN: 701 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 702 break; 703 case T_CHAR: 704 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 705 break; 706 case T_SHORT: 707 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 708 break; 709 case T_INT: 710 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 711 break; 712 case T_FLOAT: 713 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 714 break; 715 case T_DOUBLE: 716 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 717 break; 718 case T_LONG: 719 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 720 break; 721 case T_OBJECT: 722 { 723 #ifdef ASSERT 724 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 725 assert(fd->signature() == sym, "just checking"); 726 #endif 727 oop string = fd->string_initial_value(CHECK); 728 mirror()->obj_field_put(fd->offset(), string); 729 } 730 break; 731 default: 732 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 733 "Illegal ConstantValue attribute in class file"); 734 } 735 } 736 } 737 738 739 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 740 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 741 742 // If the offset was read from the shared archive, it was fixed up already 743 if (!k->is_shared()) { 744 if (k->is_instance_klass()) { 745 // During bootstrap, java.lang.Class wasn't loaded so static field 746 // offsets were computed without the size added it. Go back and 747 // update all the static field offsets to included the size. 748 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 749 if (fs.access_flags().is_static()) { 750 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 751 fs.set_offset(real_offset); 752 } 753 } 754 } 755 } 756 create_mirror(k, Handle(NULL), Handle(NULL), Handle(NULL), CHECK); 757 } 758 759 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 760 Handle mirror, 761 Handle protection_domain, 762 TRAPS) { 763 // Allocate a simple java object for a lock. 764 // This needs to be a java object because during class initialization 765 // it can be held across a java call. 766 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 767 set_init_lock(mirror(), r); 768 769 // Set protection domain also 770 set_protection_domain(mirror(), protection_domain()); 771 772 // Initialize static fields 773 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 774 } 775 776 // Set the java.lang.reflect.Module module field in the java_lang_Class mirror 777 void java_lang_Class::set_mirror_module_field(KlassHandle k, Handle mirror, Handle module, TRAPS) { 778 if (module.is_null()) { 779 // During startup, the module may be NULL only if java.base has not been defined yet. 780 // Put the class on the fixup_module_list to patch later when the java.lang.reflect.Module 781 // for java.base is known. 782 assert(!Universe::is_module_initialized(), "Incorrect java.lang.reflect.Module pre module system initialization"); 783 784 bool javabase_was_defined = false; 785 { 786 MutexLocker m1(Module_lock, THREAD); 787 // Keep list of classes needing java.base module fixup 788 if (!ModuleEntryTable::javabase_defined()) { 789 if (fixup_module_field_list() == NULL) { 790 GrowableArray<Klass*>* list = 791 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 792 set_fixup_module_field_list(list); 793 } 794 k->class_loader_data()->inc_keep_alive(); 795 fixup_module_field_list()->push(k()); 796 } else { 797 javabase_was_defined = true; 798 } 799 } 800 801 // If java.base was already defined then patch this particular class with java.base. 802 if (javabase_was_defined) { 803 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 804 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 805 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 806 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module())); 807 set_module(mirror(), javabase_handle()); 808 } 809 } else { 810 assert(Universe::is_module_initialized() || 811 (ModuleEntryTable::javabase_defined() && 812 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))), 813 "Incorrect java.lang.reflect.Module specification while creating mirror"); 814 set_module(mirror(), module()); 815 } 816 } 817 818 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 819 Handle module, Handle protection_domain, TRAPS) { 820 assert(k->java_mirror() == NULL, "should only assign mirror once"); 821 // Use this moment of initialization to cache modifier_flags also, 822 // to support Class.getModifiers(). Instance classes recalculate 823 // the cached flags after the class file is parsed, but before the 824 // class is put into the system dictionary. 825 int computed_modifiers = k->compute_modifier_flags(CHECK); 826 k->set_modifier_flags(computed_modifiers); 827 // Class_klass has to be loaded because it is used to allocate 828 // the mirror. 829 if (SystemDictionary::Class_klass_loaded()) { 830 // Allocate mirror (java.lang.Class instance) 831 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 832 833 // Setup indirection from mirror->klass 834 if (!k.is_null()) { 835 java_lang_Class::set_klass(mirror(), k()); 836 } 837 838 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 839 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 840 841 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 842 843 // It might also have a component mirror. This mirror must already exist. 844 if (k->is_array_klass()) { 845 Handle comp_mirror; 846 if (k->is_typeArray_klass()) { 847 BasicType type = TypeArrayKlass::cast(k())->element_type(); 848 comp_mirror = Universe::java_mirror(type); 849 } else { 850 assert(k->is_objArray_klass(), "Must be"); 851 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 852 assert(element_klass != NULL, "Must have an element klass"); 853 comp_mirror = element_klass->java_mirror(); 854 } 855 assert(comp_mirror.not_null(), "must have a mirror"); 856 857 // Two-way link between the array klass and its component mirror: 858 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 859 set_component_mirror(mirror(), comp_mirror()); 860 set_array_klass(comp_mirror(), k()); 861 } else { 862 assert(k->is_instance_klass(), "Must be"); 863 864 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 865 if (HAS_PENDING_EXCEPTION) { 866 // If any of the fields throws an exception like OOM remove the klass field 867 // from the mirror so GC doesn't follow it after the klass has been deallocated. 868 // This mirror looks like a primitive type, which logically it is because it 869 // it represents no class. 870 java_lang_Class::set_klass(mirror(), NULL); 871 return; 872 } 873 } 874 875 // set the classLoader field in the java_lang_Class instance 876 assert(class_loader() == k->class_loader(), "should be same"); 877 set_class_loader(mirror(), class_loader()); 878 879 // set the module field in the java_lang_Class instance 880 set_mirror_module_field(k, mirror, module, THREAD); 881 882 // Setup indirection from klass->mirror last 883 // after any exceptions can happen during allocations. 884 if (!k.is_null()) { 885 k->set_java_mirror(mirror()); 886 } 887 } else { 888 if (fixup_mirror_list() == NULL) { 889 GrowableArray<Klass*>* list = 890 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 891 set_fixup_mirror_list(list); 892 } 893 fixup_mirror_list()->push(k()); 894 } 895 } 896 897 void java_lang_Class::fixup_module_field(KlassHandle k, Handle module) { 898 assert(_module_offset != 0, "must have been computed already"); 899 java_lang_Class::set_module(k->java_mirror(), module()); 900 } 901 902 int java_lang_Class::oop_size(oop java_class) { 903 assert(_oop_size_offset != 0, "must be set"); 904 int size = java_class->int_field(_oop_size_offset); 905 assert(size > 0, "Oop size must be greater than zero, not %d", size); 906 return size; 907 } 908 909 void java_lang_Class::set_oop_size(oop java_class, int size) { 910 assert(_oop_size_offset != 0, "must be set"); 911 assert(size > 0, "Oop size must be greater than zero, not %d", size); 912 java_class->int_field_put(_oop_size_offset, size); 913 } 914 915 int java_lang_Class::static_oop_field_count(oop java_class) { 916 assert(_static_oop_field_count_offset != 0, "must be set"); 917 return java_class->int_field(_static_oop_field_count_offset); 918 } 919 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 920 assert(_static_oop_field_count_offset != 0, "must be set"); 921 java_class->int_field_put(_static_oop_field_count_offset, size); 922 } 923 924 oop java_lang_Class::protection_domain(oop java_class) { 925 assert(_protection_domain_offset != 0, "must be set"); 926 return java_class->obj_field(_protection_domain_offset); 927 } 928 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 929 assert(_protection_domain_offset != 0, "must be set"); 930 java_class->obj_field_put(_protection_domain_offset, pd); 931 } 932 933 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 934 assert(_component_mirror_offset != 0, "must be set"); 935 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 936 } 937 oop java_lang_Class::component_mirror(oop java_class) { 938 assert(_component_mirror_offset != 0, "must be set"); 939 return java_class->obj_field(_component_mirror_offset); 940 } 941 942 oop java_lang_Class::init_lock(oop java_class) { 943 assert(_init_lock_offset != 0, "must be set"); 944 return java_class->obj_field(_init_lock_offset); 945 } 946 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 947 assert(_init_lock_offset != 0, "must be set"); 948 java_class->obj_field_put(_init_lock_offset, init_lock); 949 } 950 951 objArrayOop java_lang_Class::signers(oop java_class) { 952 assert(_signers_offset != 0, "must be set"); 953 return (objArrayOop)java_class->obj_field(_signers_offset); 954 } 955 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 956 assert(_signers_offset != 0, "must be set"); 957 java_class->obj_field_put(_signers_offset, (oop)signers); 958 } 959 960 961 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 962 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 963 if (_class_loader_offset != 0) { 964 java_class->obj_field_put(_class_loader_offset, loader); 965 } 966 } 967 968 oop java_lang_Class::class_loader(oop java_class) { 969 assert(_class_loader_offset != 0, "must be set"); 970 return java_class->obj_field(_class_loader_offset); 971 } 972 973 oop java_lang_Class::module(oop java_class) { 974 assert(_module_offset != 0, "must be set"); 975 return java_class->obj_field(_module_offset); 976 } 977 978 void java_lang_Class::set_module(oop java_class, oop module) { 979 assert(_module_offset != 0, "must be set"); 980 java_class->obj_field_put(_module_offset, module); 981 } 982 983 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 984 // This should be improved by adding a field at the Java level or by 985 // introducing a new VM klass (see comment in ClassFileParser) 986 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 987 if (type != T_VOID) { 988 Klass* aklass = Universe::typeArrayKlassObj(type); 989 assert(aklass != NULL, "correct bootstrap"); 990 set_array_klass(java_class, aklass); 991 } 992 #ifdef ASSERT 993 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 994 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 995 #endif 996 return java_class; 997 } 998 999 1000 Klass* java_lang_Class::as_Klass(oop java_class) { 1001 //%note memory_2 1002 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1003 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1004 assert(k == NULL || k->is_klass(), "type check"); 1005 return k; 1006 } 1007 1008 1009 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1010 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1011 java_class->metadata_field_put(_klass_offset, klass); 1012 } 1013 1014 1015 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1016 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1017 Symbol* name = NULL; 1018 bool is_instance = false; 1019 if (is_primitive(java_class)) { 1020 name = vmSymbols::type_signature(primitive_type(java_class)); 1021 } else { 1022 Klass* k = as_Klass(java_class); 1023 is_instance = k->is_instance_klass(); 1024 name = k->name(); 1025 } 1026 if (name == NULL) { 1027 st->print("<null>"); 1028 return; 1029 } 1030 if (is_instance) st->print("L"); 1031 st->write((char*) name->base(), (int) name->utf8_length()); 1032 if (is_instance) st->print(";"); 1033 } 1034 1035 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1036 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1037 Symbol* name; 1038 if (is_primitive(java_class)) { 1039 name = vmSymbols::type_signature(primitive_type(java_class)); 1040 // Because this can create a new symbol, the caller has to decrement 1041 // the refcount, so make adjustment here and below for symbols returned 1042 // that are not created or incremented due to a successful lookup. 1043 name->increment_refcount(); 1044 } else { 1045 Klass* k = as_Klass(java_class); 1046 if (!k->is_instance_klass()) { 1047 name = k->name(); 1048 name->increment_refcount(); 1049 } else { 1050 ResourceMark rm; 1051 const char* sigstr = k->signature_name(); 1052 int siglen = (int) strlen(sigstr); 1053 if (!intern_if_not_found) { 1054 name = SymbolTable::probe(sigstr, siglen); 1055 } else { 1056 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1057 } 1058 } 1059 } 1060 return name; 1061 } 1062 1063 // Returns the Java name for this Java mirror (Resource allocated) 1064 // See Klass::external_name(). 1065 // For primitive type Java mirrors, its type name is returned. 1066 const char* java_lang_Class::as_external_name(oop java_class) { 1067 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1068 const char* name = NULL; 1069 if (is_primitive(java_class)) { 1070 name = type2name(primitive_type(java_class)); 1071 } else { 1072 name = as_Klass(java_class)->external_name(); 1073 } 1074 if (name == NULL) { 1075 name = "<null>"; 1076 } 1077 return name; 1078 } 1079 1080 Klass* java_lang_Class::array_klass(oop java_class) { 1081 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1082 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1083 return k; 1084 } 1085 1086 1087 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1088 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1089 java_class->metadata_field_put(_array_klass_offset, klass); 1090 } 1091 1092 1093 bool java_lang_Class::is_primitive(oop java_class) { 1094 // should assert: 1095 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1096 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1097 1098 #ifdef ASSERT 1099 if (is_primitive) { 1100 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1101 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1102 "Should be either the T_VOID primitive or a java primitive"); 1103 } 1104 #endif 1105 1106 return is_primitive; 1107 } 1108 1109 1110 BasicType java_lang_Class::primitive_type(oop java_class) { 1111 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1112 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1113 BasicType type = T_VOID; 1114 if (ak != NULL) { 1115 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1116 type = ArrayKlass::cast(ak)->element_type(); 1117 } else { 1118 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1119 } 1120 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1121 return type; 1122 } 1123 1124 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1125 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1126 if (is_primitive(java_class)) { 1127 if (reference_klass != NULL) 1128 (*reference_klass) = NULL; 1129 return primitive_type(java_class); 1130 } else { 1131 if (reference_klass != NULL) 1132 (*reference_klass) = as_Klass(java_class); 1133 return T_OBJECT; 1134 } 1135 } 1136 1137 1138 oop java_lang_Class::primitive_mirror(BasicType t) { 1139 oop mirror = Universe::java_mirror(t); 1140 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1141 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1142 return mirror; 1143 } 1144 1145 bool java_lang_Class::offsets_computed = false; 1146 int java_lang_Class::classRedefinedCount_offset = -1; 1147 1148 void java_lang_Class::compute_offsets() { 1149 assert(!offsets_computed, "offsets should be initialized only once"); 1150 offsets_computed = true; 1151 1152 Klass* k = SystemDictionary::Class_klass(); 1153 // The classRedefinedCount field is only present starting in 1.5, 1154 // so don't go fatal. 1155 compute_optional_offset(classRedefinedCount_offset, 1156 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1157 1158 // Needs to be optional because the old build runs Queens during bootstrapping 1159 // and jdk8-9 doesn't have coordinated pushes yet. 1160 compute_optional_offset(_class_loader_offset, 1161 k, vmSymbols::classLoader_name(), 1162 vmSymbols::classloader_signature()); 1163 1164 compute_offset(_component_mirror_offset, 1165 k, vmSymbols::componentType_name(), 1166 vmSymbols::class_signature()); 1167 1168 compute_offset(_module_offset, 1169 k, vmSymbols::module_name(), 1170 vmSymbols::module_signature()); 1171 1172 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1173 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1174 // GC treats them the same. 1175 _init_lock_offset = _component_mirror_offset; 1176 1177 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1178 } 1179 1180 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1181 if (classRedefinedCount_offset == -1) { 1182 // If we don't have an offset for it then just return -1 as a marker. 1183 return -1; 1184 } 1185 1186 return the_class_mirror->int_field(classRedefinedCount_offset); 1187 } 1188 1189 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1190 if (classRedefinedCount_offset == -1) { 1191 // If we don't have an offset for it then nothing to set. 1192 return; 1193 } 1194 1195 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1196 } 1197 1198 1199 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1200 // platform thread structure, and a eetop offset which was used for thread 1201 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1202 // merged, so in the HotSpot VM we just use the eetop field for the thread 1203 // instead of the privateInfo_offset. 1204 // 1205 // Note: The stackSize field is only present starting in 1.4. 1206 1207 int java_lang_Thread::_name_offset = 0; 1208 int java_lang_Thread::_group_offset = 0; 1209 int java_lang_Thread::_contextClassLoader_offset = 0; 1210 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1211 int java_lang_Thread::_priority_offset = 0; 1212 int java_lang_Thread::_eetop_offset = 0; 1213 int java_lang_Thread::_daemon_offset = 0; 1214 int java_lang_Thread::_stillborn_offset = 0; 1215 int java_lang_Thread::_stackSize_offset = 0; 1216 int java_lang_Thread::_tid_offset = 0; 1217 int java_lang_Thread::_thread_status_offset = 0; 1218 int java_lang_Thread::_park_blocker_offset = 0; 1219 int java_lang_Thread::_park_event_offset = 0 ; 1220 1221 1222 void java_lang_Thread::compute_offsets() { 1223 assert(_group_offset == 0, "offsets should be initialized only once"); 1224 1225 Klass* k = SystemDictionary::Thread_klass(); 1226 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1227 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1228 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1229 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1230 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1231 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1232 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1233 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1234 // The stackSize field is only present starting in 1.4, so don't go fatal. 1235 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1236 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1237 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1238 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1239 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1240 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1241 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1242 vmSymbols::long_signature()); 1243 } 1244 1245 1246 JavaThread* java_lang_Thread::thread(oop java_thread) { 1247 return (JavaThread*)java_thread->address_field(_eetop_offset); 1248 } 1249 1250 1251 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1252 java_thread->address_field_put(_eetop_offset, (address)thread); 1253 } 1254 1255 1256 oop java_lang_Thread::name(oop java_thread) { 1257 return java_thread->obj_field(_name_offset); 1258 } 1259 1260 1261 void java_lang_Thread::set_name(oop java_thread, oop name) { 1262 java_thread->obj_field_put(_name_offset, name); 1263 } 1264 1265 1266 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1267 return (ThreadPriority)java_thread->int_field(_priority_offset); 1268 } 1269 1270 1271 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1272 java_thread->int_field_put(_priority_offset, priority); 1273 } 1274 1275 1276 oop java_lang_Thread::threadGroup(oop java_thread) { 1277 return java_thread->obj_field(_group_offset); 1278 } 1279 1280 1281 bool java_lang_Thread::is_stillborn(oop java_thread) { 1282 return java_thread->bool_field(_stillborn_offset) != 0; 1283 } 1284 1285 1286 // We never have reason to turn the stillborn bit off 1287 void java_lang_Thread::set_stillborn(oop java_thread) { 1288 java_thread->bool_field_put(_stillborn_offset, true); 1289 } 1290 1291 1292 bool java_lang_Thread::is_alive(oop java_thread) { 1293 JavaThread* thr = java_lang_Thread::thread(java_thread); 1294 return (thr != NULL); 1295 } 1296 1297 1298 bool java_lang_Thread::is_daemon(oop java_thread) { 1299 return java_thread->bool_field(_daemon_offset) != 0; 1300 } 1301 1302 1303 void java_lang_Thread::set_daemon(oop java_thread) { 1304 java_thread->bool_field_put(_daemon_offset, true); 1305 } 1306 1307 oop java_lang_Thread::context_class_loader(oop java_thread) { 1308 return java_thread->obj_field(_contextClassLoader_offset); 1309 } 1310 1311 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1312 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1313 } 1314 1315 1316 jlong java_lang_Thread::stackSize(oop java_thread) { 1317 if (_stackSize_offset > 0) { 1318 return java_thread->long_field(_stackSize_offset); 1319 } else { 1320 return 0; 1321 } 1322 } 1323 1324 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1325 void java_lang_Thread::set_thread_status(oop java_thread, 1326 java_lang_Thread::ThreadStatus status) { 1327 // The threadStatus is only present starting in 1.5 1328 if (_thread_status_offset > 0) { 1329 java_thread->int_field_put(_thread_status_offset, status); 1330 } 1331 } 1332 1333 // Read thread status value from threadStatus field in java.lang.Thread java class. 1334 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1335 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1336 JavaThread::current()->thread_state() == _thread_in_vm, 1337 "Java Thread is not running in vm"); 1338 // The threadStatus is only present starting in 1.5 1339 if (_thread_status_offset > 0) { 1340 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1341 } else { 1342 // All we can easily figure out is if it is alive, but that is 1343 // enough info for a valid unknown status. 1344 // These aren't restricted to valid set ThreadStatus values, so 1345 // use JVMTI values and cast. 1346 JavaThread* thr = java_lang_Thread::thread(java_thread); 1347 if (thr == NULL) { 1348 // the thread hasn't run yet or is in the process of exiting 1349 return NEW; 1350 } 1351 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1352 } 1353 } 1354 1355 1356 jlong java_lang_Thread::thread_id(oop java_thread) { 1357 // The thread ID field is only present starting in 1.5 1358 if (_tid_offset > 0) { 1359 return java_thread->long_field(_tid_offset); 1360 } else { 1361 return 0; 1362 } 1363 } 1364 1365 oop java_lang_Thread::park_blocker(oop java_thread) { 1366 assert(JDK_Version::current().supports_thread_park_blocker() && 1367 _park_blocker_offset != 0, "Must support parkBlocker field"); 1368 1369 if (_park_blocker_offset > 0) { 1370 return java_thread->obj_field(_park_blocker_offset); 1371 } 1372 1373 return NULL; 1374 } 1375 1376 jlong java_lang_Thread::park_event(oop java_thread) { 1377 if (_park_event_offset > 0) { 1378 return java_thread->long_field(_park_event_offset); 1379 } 1380 return 0; 1381 } 1382 1383 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1384 if (_park_event_offset > 0) { 1385 java_thread->long_field_put(_park_event_offset, ptr); 1386 return true; 1387 } 1388 return false; 1389 } 1390 1391 1392 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1393 assert(_thread_status_offset != 0, "Must have thread status"); 1394 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1395 switch (status) { 1396 case NEW : return "NEW"; 1397 case RUNNABLE : return "RUNNABLE"; 1398 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1399 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1400 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1401 case PARKED : return "WAITING (parking)"; 1402 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1403 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1404 case TERMINATED : return "TERMINATED"; 1405 default : return "UNKNOWN"; 1406 }; 1407 } 1408 int java_lang_ThreadGroup::_parent_offset = 0; 1409 int java_lang_ThreadGroup::_name_offset = 0; 1410 int java_lang_ThreadGroup::_threads_offset = 0; 1411 int java_lang_ThreadGroup::_groups_offset = 0; 1412 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1413 int java_lang_ThreadGroup::_destroyed_offset = 0; 1414 int java_lang_ThreadGroup::_daemon_offset = 0; 1415 int java_lang_ThreadGroup::_nthreads_offset = 0; 1416 int java_lang_ThreadGroup::_ngroups_offset = 0; 1417 1418 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1419 assert(java_thread_group->is_oop(), "thread group must be oop"); 1420 return java_thread_group->obj_field(_parent_offset); 1421 } 1422 1423 // ("name as oop" accessor is not necessary) 1424 1425 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1426 oop name = java_thread_group->obj_field(_name_offset); 1427 // ThreadGroup.name can be null 1428 if (name != NULL) { 1429 return java_lang_String::as_utf8_string(name); 1430 } 1431 return NULL; 1432 } 1433 1434 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1435 assert(java_thread_group->is_oop(), "thread group must be oop"); 1436 return java_thread_group->int_field(_nthreads_offset); 1437 } 1438 1439 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1440 oop threads = java_thread_group->obj_field(_threads_offset); 1441 assert(threads != NULL, "threadgroups should have threads"); 1442 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1443 return objArrayOop(threads); 1444 } 1445 1446 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1447 assert(java_thread_group->is_oop(), "thread group must be oop"); 1448 return java_thread_group->int_field(_ngroups_offset); 1449 } 1450 1451 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1452 oop groups = java_thread_group->obj_field(_groups_offset); 1453 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1454 return objArrayOop(groups); 1455 } 1456 1457 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1458 assert(java_thread_group->is_oop(), "thread group must be oop"); 1459 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1460 } 1461 1462 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1463 assert(java_thread_group->is_oop(), "thread group must be oop"); 1464 return java_thread_group->bool_field(_destroyed_offset) != 0; 1465 } 1466 1467 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1468 assert(java_thread_group->is_oop(), "thread group must be oop"); 1469 return java_thread_group->bool_field(_daemon_offset) != 0; 1470 } 1471 1472 void java_lang_ThreadGroup::compute_offsets() { 1473 assert(_parent_offset == 0, "offsets should be initialized only once"); 1474 1475 Klass* k = SystemDictionary::ThreadGroup_klass(); 1476 1477 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1478 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1479 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1480 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1481 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1482 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1483 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1484 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1485 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1486 } 1487 1488 1489 void java_lang_Throwable::compute_offsets() { 1490 Klass* k = SystemDictionary::Throwable_klass(); 1491 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1492 } 1493 1494 oop java_lang_Throwable::unassigned_stacktrace() { 1495 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1496 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1497 if (UseCompressedOops) { 1498 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1499 } else { 1500 return oopDesc::load_decode_heap_oop((oop*)addr); 1501 } 1502 } 1503 1504 oop java_lang_Throwable::backtrace(oop throwable) { 1505 return throwable->obj_field_acquire(backtrace_offset); 1506 } 1507 1508 1509 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1510 throwable->release_obj_field_put(backtrace_offset, value); 1511 } 1512 1513 int java_lang_Throwable::depth(oop throwable) { 1514 return throwable->int_field(depth_offset); 1515 } 1516 1517 void java_lang_Throwable::set_depth(oop throwable, int value) { 1518 throwable->int_field_put(depth_offset, value); 1519 } 1520 1521 oop java_lang_Throwable::message(Handle throwable) { 1522 return throwable->obj_field(detailMessage_offset); 1523 } 1524 1525 1526 // Return Symbol for detailed_message or NULL 1527 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1528 PRESERVE_EXCEPTION_MARK; // Keep original exception 1529 oop detailed_message = java_lang_Throwable::message(throwable); 1530 if (detailed_message != NULL) { 1531 return java_lang_String::as_symbol(detailed_message, THREAD); 1532 } 1533 return NULL; 1534 } 1535 1536 void java_lang_Throwable::set_message(oop throwable, oop value) { 1537 throwable->obj_field_put(detailMessage_offset, value); 1538 } 1539 1540 1541 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1542 throwable->obj_field_put(stackTrace_offset, st_element_array); 1543 } 1544 1545 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1546 set_stacktrace(throwable, NULL); 1547 } 1548 1549 1550 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1551 ResourceMark rm; 1552 Klass* k = throwable->klass(); 1553 assert(k != NULL, "just checking"); 1554 st->print("%s", k->external_name()); 1555 oop msg = message(throwable); 1556 if (msg != NULL) { 1557 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1558 } 1559 } 1560 1561 // After this many redefines, the stack trace is unreliable. 1562 const int MAX_VERSION = USHRT_MAX; 1563 1564 static inline bool version_matches(Method* method, int version) { 1565 assert(version < MAX_VERSION, "version is too big"); 1566 return method != NULL && (method->constants()->version() == version); 1567 } 1568 1569 1570 // This class provides a simple wrapper over the internal structure of 1571 // exception backtrace to insulate users of the backtrace from needing 1572 // to know what it looks like. 1573 class BacktraceBuilder: public StackObj { 1574 friend class BacktraceIterator; 1575 private: 1576 Handle _backtrace; 1577 objArrayOop _head; 1578 typeArrayOop _methods; 1579 typeArrayOop _bcis; 1580 objArrayOop _mirrors; 1581 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1582 int _index; 1583 NoSafepointVerifier _nsv; 1584 1585 enum { 1586 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1587 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1588 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1589 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1590 trace_next_offset = java_lang_Throwable::trace_next_offset, 1591 trace_size = java_lang_Throwable::trace_size, 1592 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1593 }; 1594 1595 // get info out of chunks 1596 static typeArrayOop get_methods(objArrayHandle chunk) { 1597 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1598 assert(methods != NULL, "method array should be initialized in backtrace"); 1599 return methods; 1600 } 1601 static typeArrayOop get_bcis(objArrayHandle chunk) { 1602 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1603 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1604 return bcis; 1605 } 1606 static objArrayOop get_mirrors(objArrayHandle chunk) { 1607 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1608 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1609 return mirrors; 1610 } 1611 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1612 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1613 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1614 return cprefs; 1615 } 1616 1617 public: 1618 1619 // constructor for new backtrace 1620 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1621 expand(CHECK); 1622 _backtrace = _head; 1623 _index = 0; 1624 } 1625 1626 BacktraceBuilder(objArrayHandle backtrace) { 1627 _methods = get_methods(backtrace); 1628 _bcis = get_bcis(backtrace); 1629 _mirrors = get_mirrors(backtrace); 1630 _cprefs = get_cprefs(backtrace); 1631 assert(_methods->length() == _bcis->length() && 1632 _methods->length() == _mirrors->length(), 1633 "method and source information arrays should match"); 1634 1635 // head is the preallocated backtrace 1636 _backtrace = _head = backtrace(); 1637 _index = 0; 1638 } 1639 1640 void expand(TRAPS) { 1641 objArrayHandle old_head(THREAD, _head); 1642 PauseNoSafepointVerifier pnsv(&_nsv); 1643 1644 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1645 objArrayHandle new_head(THREAD, head); 1646 1647 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1648 typeArrayHandle new_methods(THREAD, methods); 1649 1650 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1651 typeArrayHandle new_bcis(THREAD, bcis); 1652 1653 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1654 objArrayHandle new_mirrors(THREAD, mirrors); 1655 1656 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1657 typeArrayHandle new_cprefs(THREAD, cprefs); 1658 1659 if (!old_head.is_null()) { 1660 old_head->obj_at_put(trace_next_offset, new_head()); 1661 } 1662 new_head->obj_at_put(trace_methods_offset, new_methods()); 1663 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1664 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1665 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1666 1667 _head = new_head(); 1668 _methods = new_methods(); 1669 _bcis = new_bcis(); 1670 _mirrors = new_mirrors(); 1671 _cprefs = new_cprefs(); 1672 _index = 0; 1673 } 1674 1675 oop backtrace() { 1676 return _backtrace(); 1677 } 1678 1679 inline void push(Method* method, int bci, TRAPS) { 1680 // Smear the -1 bci to 0 since the array only holds unsigned 1681 // shorts. The later line number lookup would just smear the -1 1682 // to a 0 even if it could be recorded. 1683 if (bci == SynchronizationEntryBCI) bci = 0; 1684 1685 if (_index >= trace_chunk_size) { 1686 methodHandle mhandle(THREAD, method); 1687 expand(CHECK); 1688 method = mhandle(); 1689 } 1690 1691 _methods->short_at_put(_index, method->orig_method_idnum()); 1692 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1693 _cprefs->short_at_put(_index, method->name_index()); 1694 1695 // We need to save the mirrors in the backtrace to keep the class 1696 // from being unloaded while we still have this stack trace. 1697 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1698 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1699 _index++; 1700 } 1701 1702 }; 1703 1704 struct BacktraceElement : public StackObj { 1705 int _method_id; 1706 int _bci; 1707 int _version; 1708 int _cpref; 1709 Handle _mirror; 1710 BacktraceElement(Handle mirror, int mid, int version, int bci, int cpref) : 1711 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _cpref(cpref) {} 1712 }; 1713 1714 class BacktraceIterator : public StackObj { 1715 int _index; 1716 objArrayHandle _result; 1717 objArrayHandle _mirrors; 1718 typeArrayHandle _methods; 1719 typeArrayHandle _bcis; 1720 typeArrayHandle _cprefs; 1721 1722 void init(objArrayHandle result, Thread* thread) { 1723 // Get method id, bci, version and mirror from chunk 1724 _result = result; 1725 if (_result.not_null()) { 1726 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1727 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1728 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1729 _cprefs = typeArrayHandle(thread, BacktraceBuilder::get_cprefs(_result)); 1730 _index = 0; 1731 } 1732 } 1733 public: 1734 BacktraceIterator(objArrayHandle result, Thread* thread) { 1735 init(result, thread); 1736 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1737 } 1738 1739 BacktraceElement next(Thread* thread) { 1740 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1741 _methods->short_at(_index), 1742 Backtrace::version_at(_bcis->int_at(_index)), 1743 Backtrace::bci_at(_bcis->int_at(_index)), 1744 _cprefs->short_at(_index)); 1745 _index++; 1746 1747 if (_index >= java_lang_Throwable::trace_chunk_size) { 1748 int next_offset = java_lang_Throwable::trace_next_offset; 1749 // Get next chunk 1750 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1751 init(result, thread); 1752 } 1753 return e; 1754 } 1755 1756 bool repeat() { 1757 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1758 } 1759 }; 1760 1761 1762 // Print stack trace element to resource allocated buffer 1763 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1764 int version, int bci, int cpref) { 1765 ResourceMark rm; 1766 1767 // Get strings and string lengths 1768 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1769 const char* klass_name = holder->external_name(); 1770 int buf_len = (int)strlen(klass_name); 1771 1772 Method* method = holder->method_with_orig_idnum(method_id, version); 1773 1774 // The method can be NULL if the requested class version is gone 1775 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1776 char* method_name = sym->as_C_string(); 1777 buf_len += (int)strlen(method_name); 1778 1779 char* source_file_name = NULL; 1780 Symbol* source = Backtrace::get_source_file_name(holder, version); 1781 if (source != NULL) { 1782 source_file_name = source->as_C_string(); 1783 buf_len += (int)strlen(source_file_name); 1784 } 1785 1786 char *module_name = NULL, *module_version = NULL; 1787 ModuleEntry* module = holder->module(); 1788 if (module->is_named()) { 1789 module_name = module->name()->as_C_string(); 1790 buf_len += (int)strlen(module_name); 1791 if (module->version() != NULL) { 1792 module_version = module->version()->as_C_string(); 1793 buf_len += (int)strlen(module_version); 1794 } 1795 } 1796 1797 // Allocate temporary buffer with extra space for formatting and line number 1798 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1799 1800 // Print stack trace line in buffer 1801 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1802 1803 // Print module information 1804 if (module_name != NULL) { 1805 if (module_version != NULL) { 1806 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1807 } else { 1808 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1809 } 1810 } 1811 1812 if (!version_matches(method, version)) { 1813 strcat(buf, "Redefined)"); 1814 } else { 1815 int line_number = Backtrace::get_line_number(method, bci); 1816 if (line_number == -2) { 1817 strcat(buf, "Native Method)"); 1818 } else { 1819 if (source_file_name != NULL && (line_number != -1)) { 1820 // Sourcename and linenumber 1821 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1822 } else if (source_file_name != NULL) { 1823 // Just sourcename 1824 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1825 } else { 1826 // Neither sourcename nor linenumber 1827 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1828 } 1829 CompiledMethod* nm = method->code(); 1830 if (WizardMode && nm != NULL) { 1831 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1832 } 1833 } 1834 } 1835 1836 st->print_cr("%s", buf); 1837 } 1838 1839 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1840 Handle mirror = method->method_holder()->java_mirror(); 1841 int method_id = method->orig_method_idnum(); 1842 int version = method->constants()->version(); 1843 int cpref = method->name_index(); 1844 print_stack_element_to_stream(st, mirror, method_id, version, bci, cpref); 1845 } 1846 1847 /** 1848 * Print the throwable message and its stack trace plus all causes by walking the 1849 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1850 */ 1851 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1852 // First, print the message. 1853 print(throwable, st); 1854 st->cr(); 1855 1856 // Now print the stack trace. 1857 Thread* THREAD = Thread::current(); 1858 while (throwable.not_null()) { 1859 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1860 if (result.is_null()) { 1861 st->print_raw_cr("\t<<no stack trace available>>"); 1862 return; 1863 } 1864 BacktraceIterator iter(result, THREAD); 1865 1866 while (iter.repeat()) { 1867 BacktraceElement bte = iter.next(THREAD); 1868 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._cpref); 1869 } 1870 { 1871 // Call getCause() which doesn't necessarily return the _cause field. 1872 EXCEPTION_MARK; 1873 JavaValue cause(T_OBJECT); 1874 JavaCalls::call_virtual(&cause, 1875 throwable, 1876 KlassHandle(THREAD, throwable->klass()), 1877 vmSymbols::getCause_name(), 1878 vmSymbols::void_throwable_signature(), 1879 THREAD); 1880 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1881 if (HAS_PENDING_EXCEPTION) { 1882 CLEAR_PENDING_EXCEPTION; 1883 throwable = Handle(); 1884 } else { 1885 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1886 if (throwable.not_null()) { 1887 st->print("Caused by: "); 1888 print(throwable, st); 1889 st->cr(); 1890 } 1891 } 1892 } 1893 } 1894 } 1895 1896 /** 1897 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1898 */ 1899 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1900 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1901 JavaValue result(T_VOID); 1902 JavaCalls::call_virtual(&result, 1903 throwable, 1904 KlassHandle(THREAD, SystemDictionary::Throwable_klass()), 1905 vmSymbols::printStackTrace_name(), 1906 vmSymbols::void_method_signature(), 1907 THREAD); 1908 } 1909 1910 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1911 if (!StackTraceInThrowable) return; 1912 ResourceMark rm(THREAD); 1913 1914 // Start out by clearing the backtrace for this object, in case the VM 1915 // runs out of memory while allocating the stack trace 1916 set_backtrace(throwable(), NULL); 1917 // Clear lazily constructed Java level stacktrace if refilling occurs 1918 // This is unnecessary in 1.7+ but harmless 1919 clear_stacktrace(throwable()); 1920 1921 int max_depth = MaxJavaStackTraceDepth; 1922 JavaThread* thread = (JavaThread*)THREAD; 1923 1924 BacktraceBuilder bt(CHECK); 1925 1926 // If there is no Java frame just return the method that was being called 1927 // with bci 0 1928 if (!thread->has_last_Java_frame()) { 1929 if (max_depth >= 1 && method() != NULL) { 1930 bt.push(method(), 0, CHECK); 1931 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1932 set_depth(throwable(), 1); 1933 set_backtrace(throwable(), bt.backtrace()); 1934 } 1935 return; 1936 } 1937 1938 // Instead of using vframe directly, this version of fill_in_stack_trace 1939 // basically handles everything by hand. This significantly improved the 1940 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1941 // See bug 6333838 for more details. 1942 // The "ASSERT" here is to verify this method generates the exactly same stack 1943 // trace as utilizing vframe. 1944 #ifdef ASSERT 1945 vframeStream st(thread); 1946 methodHandle st_method(THREAD, st.method()); 1947 #endif 1948 int total_count = 0; 1949 RegisterMap map(thread, false); 1950 int decode_offset = 0; 1951 CompiledMethod* nm = NULL; 1952 bool skip_fillInStackTrace_check = false; 1953 bool skip_throwableInit_check = false; 1954 bool skip_hidden = !ShowHiddenFrames; 1955 1956 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1957 Method* method = NULL; 1958 int bci = 0; 1959 1960 // Compiled java method case. 1961 if (decode_offset != 0) { 1962 DebugInfoReadStream stream(nm, decode_offset); 1963 decode_offset = stream.read_int(); 1964 method = (Method*)nm->metadata_at(stream.read_int()); 1965 bci = stream.read_bci(); 1966 } else { 1967 if (fr.is_first_frame()) break; 1968 address pc = fr.pc(); 1969 if (fr.is_interpreted_frame()) { 1970 address bcp = fr.interpreter_frame_bcp(); 1971 method = fr.interpreter_frame_method(); 1972 bci = method->bci_from(bcp); 1973 fr = fr.sender(&map); 1974 } else { 1975 CodeBlob* cb = fr.cb(); 1976 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1977 // but non nmethod 1978 fr = fr.sender(&map); 1979 if (cb == NULL || !cb->is_compiled()) { 1980 continue; 1981 } 1982 nm = cb->as_compiled_method(); 1983 if (nm->method()->is_native()) { 1984 method = nm->method(); 1985 bci = 0; 1986 } else { 1987 PcDesc* pd = nm->pc_desc_at(pc); 1988 decode_offset = pd->scope_decode_offset(); 1989 // if decode_offset is not equal to 0, it will execute the 1990 // "compiled java method case" at the beginning of the loop. 1991 continue; 1992 } 1993 } 1994 } 1995 #ifdef ASSERT 1996 assert(st_method() == method && st.bci() == bci, 1997 "Wrong stack trace"); 1998 st.next(); 1999 // vframeStream::method isn't GC-safe so store off a copy 2000 // of the Method* in case we GC. 2001 if (!st.at_end()) { 2002 st_method = st.method(); 2003 } 2004 #endif 2005 2006 // the format of the stacktrace will be: 2007 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2008 // - 0 or more <init> methods for the exception class (skipped) 2009 // - rest of the stack 2010 2011 if (!skip_fillInStackTrace_check) { 2012 if (method->name() == vmSymbols::fillInStackTrace_name() && 2013 throwable->is_a(method->method_holder())) { 2014 continue; 2015 } 2016 else { 2017 skip_fillInStackTrace_check = true; // gone past them all 2018 } 2019 } 2020 if (!skip_throwableInit_check) { 2021 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2022 2023 // skip <init> methods of the exception class and superclasses 2024 // This is simlar to classic VM. 2025 if (method->name() == vmSymbols::object_initializer_name() && 2026 throwable->is_a(method->method_holder())) { 2027 continue; 2028 } else { 2029 // there are none or we've seen them all - either way stop checking 2030 skip_throwableInit_check = true; 2031 } 2032 } 2033 if (method->is_hidden()) { 2034 if (skip_hidden) continue; 2035 } 2036 bt.push(method, bci, CHECK); 2037 total_count++; 2038 } 2039 2040 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2041 2042 // Put completed stack trace into throwable object 2043 set_backtrace(throwable(), bt.backtrace()); 2044 set_depth(throwable(), total_count); 2045 } 2046 2047 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2048 // No-op if stack trace is disabled 2049 if (!StackTraceInThrowable) { 2050 return; 2051 } 2052 2053 // Disable stack traces for some preallocated out of memory errors 2054 if (!Universe::should_fill_in_stack_trace(throwable)) { 2055 return; 2056 } 2057 2058 PRESERVE_EXCEPTION_MARK; 2059 2060 JavaThread* thread = JavaThread::active(); 2061 fill_in_stack_trace(throwable, method, thread); 2062 // ignore exceptions thrown during stack trace filling 2063 CLEAR_PENDING_EXCEPTION; 2064 } 2065 2066 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2067 // Allocate stack trace - backtrace is created but not filled in 2068 2069 // No-op if stack trace is disabled 2070 if (!StackTraceInThrowable) return; 2071 BacktraceBuilder bt(CHECK); // creates a backtrace 2072 set_backtrace(throwable(), bt.backtrace()); 2073 } 2074 2075 2076 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2077 // Fill in stack trace into preallocated backtrace (no GC) 2078 2079 // No-op if stack trace is disabled 2080 if (!StackTraceInThrowable) return; 2081 2082 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2083 2084 JavaThread* THREAD = JavaThread::current(); 2085 2086 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2087 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2088 2089 ResourceMark rm(THREAD); 2090 vframeStream st(THREAD); 2091 2092 BacktraceBuilder bt(backtrace); 2093 2094 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2095 // methods as preallocated errors aren't created by "java" code. 2096 2097 // fill in as much stack trace as possible 2098 int chunk_count = 0; 2099 for (;!st.at_end(); st.next()) { 2100 bt.push(st.method(), st.bci(), CHECK); 2101 chunk_count++; 2102 2103 // Bail-out for deep stacks 2104 if (chunk_count >= trace_chunk_size) break; 2105 } 2106 set_depth(throwable(), chunk_count); 2107 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2108 2109 // We support the Throwable immutability protocol defined for Java 7. 2110 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2111 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2112 } 2113 2114 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2115 objArrayHandle stack_trace_array_h, TRAPS) { 2116 2117 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2118 THROW(vmSymbols::java_lang_NullPointerException()); 2119 } 2120 2121 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2122 2123 if (stack_trace_array_h->length() != depth(throwable())) { 2124 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2125 } 2126 2127 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2128 BacktraceIterator iter(result, THREAD); 2129 2130 int index = 0; 2131 while (iter.repeat()) { 2132 BacktraceElement bte = iter.next(THREAD); 2133 2134 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2135 2136 if (stack_trace_element.is_null()) { 2137 THROW(vmSymbols::java_lang_NullPointerException()); 2138 } 2139 2140 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2141 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2142 2143 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2144 method, 2145 bte._version, 2146 bte._bci, 2147 bte._cpref, CHECK); 2148 } 2149 } 2150 2151 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2152 // Allocate java.lang.StackTraceElement instance 2153 Klass* k = SystemDictionary::StackTraceElement_klass(); 2154 assert(k != NULL, "must be loaded in 1.4+"); 2155 instanceKlassHandle ik (THREAD, k); 2156 if (ik->should_be_initialized()) { 2157 ik->initialize(CHECK_0); 2158 } 2159 2160 Handle element = ik->allocate_instance_handle(CHECK_0); 2161 2162 int cpref = method->name_index(); 2163 int version = method->constants()->version(); 2164 fill_in(element, method->method_holder(), method, version, bci, cpref, CHECK_0); 2165 return element(); 2166 } 2167 2168 void java_lang_StackTraceElement::fill_in(Handle element, 2169 InstanceKlass* holder, const methodHandle& method, 2170 int version, int bci, int cpref, TRAPS) { 2171 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2172 2173 // Fill in class name 2174 ResourceMark rm(THREAD); 2175 const char* str = holder->external_name(); 2176 oop classname = StringTable::intern((char*) str, CHECK); 2177 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2178 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2179 2180 oop loader = holder->class_loader(); 2181 if (loader != NULL) { 2182 oop loader_name = java_lang_ClassLoader::name(loader); 2183 if (loader_name != NULL) 2184 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2185 } 2186 2187 // The method can be NULL if the requested class version is gone 2188 Symbol* sym = !method.is_null() ? method->name() : holder->constants()->symbol_at(cpref); 2189 2190 // Fill in method name 2191 oop methodname = StringTable::intern(sym, CHECK); 2192 java_lang_StackTraceElement::set_methodName(element(), methodname); 2193 2194 // Fill in module name and version 2195 ModuleEntry* module = holder->module(); 2196 if (module->is_named()) { 2197 oop module_name = StringTable::intern(module->name(), CHECK); 2198 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2199 oop module_version; 2200 if (module->version() != NULL) { 2201 module_version = StringTable::intern(module->version(), CHECK); 2202 } else { 2203 module_version = NULL; 2204 } 2205 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2206 } 2207 2208 if (!version_matches(method(), version)) { 2209 // The method was redefined, accurate line number information isn't available 2210 java_lang_StackTraceElement::set_fileName(element(), NULL); 2211 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2212 } else { 2213 // Fill in source file name and line number. 2214 Symbol* source = Backtrace::get_source_file_name(holder, version); 2215 if (ShowHiddenFrames && source == NULL) 2216 source = vmSymbols::unknown_class_name(); 2217 oop filename = StringTable::intern(source, CHECK); 2218 java_lang_StackTraceElement::set_fileName(element(), filename); 2219 2220 int line_number = Backtrace::get_line_number(method, bci); 2221 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2222 } 2223 } 2224 2225 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2226 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2227 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2228 // we should expand MemberName::name when Throwable uses StackTrace 2229 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2230 return method; 2231 } 2232 2233 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) { 2234 // set Method* or mid/cpref 2235 oop mname = stackFrame->obj_field(_memberName_offset); 2236 InstanceKlass* ik = method->method_holder(); 2237 CallInfo info(method(), ik); 2238 MethodHandles::init_method_MemberName(mname, info); 2239 // set bci 2240 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2241 // method may be redefined; store the version 2242 int version = method->constants()->version(); 2243 assert((jushort)version == version, "version should be short"); 2244 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2245 } 2246 2247 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2248 ResourceMark rm(THREAD); 2249 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2250 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2251 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2252 2253 short version = stackFrame->short_field(_version_offset); 2254 short bci = stackFrame->short_field(_bci_offset); 2255 int cpref = method->name_index(); 2256 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, cpref, CHECK); 2257 } 2258 2259 void java_lang_StackFrameInfo::compute_offsets() { 2260 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2261 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2262 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2263 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2264 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2265 } 2266 2267 void java_lang_LiveStackFrameInfo::compute_offsets() { 2268 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2269 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2270 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2271 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2272 } 2273 2274 void java_lang_reflect_AccessibleObject::compute_offsets() { 2275 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2276 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2277 } 2278 2279 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2281 return (jboolean) reflect->bool_field(override_offset); 2282 } 2283 2284 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 reflect->bool_field_put(override_offset, (int) value); 2287 } 2288 2289 void java_lang_reflect_Method::compute_offsets() { 2290 Klass* k = SystemDictionary::reflect_Method_klass(); 2291 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2292 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2293 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2294 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2295 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2296 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2297 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2298 // The generic signature and annotations fields are only present in 1.5 2299 signature_offset = -1; 2300 annotations_offset = -1; 2301 parameter_annotations_offset = -1; 2302 annotation_default_offset = -1; 2303 type_annotations_offset = -1; 2304 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2305 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2306 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2307 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2308 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2309 } 2310 2311 Handle java_lang_reflect_Method::create(TRAPS) { 2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2313 Klass* klass = SystemDictionary::reflect_Method_klass(); 2314 // This class is eagerly initialized during VM initialization, since we keep a refence 2315 // to one of the methods 2316 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2317 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2318 } 2319 2320 oop java_lang_reflect_Method::clazz(oop reflect) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return reflect->obj_field(clazz_offset); 2323 } 2324 2325 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 reflect->obj_field_put(clazz_offset, value); 2328 } 2329 2330 int java_lang_reflect_Method::slot(oop reflect) { 2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2332 return reflect->int_field(slot_offset); 2333 } 2334 2335 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2337 reflect->int_field_put(slot_offset, value); 2338 } 2339 2340 oop java_lang_reflect_Method::name(oop method) { 2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2342 return method->obj_field(name_offset); 2343 } 2344 2345 void java_lang_reflect_Method::set_name(oop method, oop value) { 2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2347 method->obj_field_put(name_offset, value); 2348 } 2349 2350 oop java_lang_reflect_Method::return_type(oop method) { 2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2352 return method->obj_field(returnType_offset); 2353 } 2354 2355 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2357 method->obj_field_put(returnType_offset, value); 2358 } 2359 2360 oop java_lang_reflect_Method::parameter_types(oop method) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 return method->obj_field(parameterTypes_offset); 2363 } 2364 2365 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2367 method->obj_field_put(parameterTypes_offset, value); 2368 } 2369 2370 oop java_lang_reflect_Method::exception_types(oop method) { 2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2372 return method->obj_field(exceptionTypes_offset); 2373 } 2374 2375 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2377 method->obj_field_put(exceptionTypes_offset, value); 2378 } 2379 2380 int java_lang_reflect_Method::modifiers(oop method) { 2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2382 return method->int_field(modifiers_offset); 2383 } 2384 2385 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2387 method->int_field_put(modifiers_offset, value); 2388 } 2389 2390 bool java_lang_reflect_Method::has_signature_field() { 2391 return (signature_offset >= 0); 2392 } 2393 2394 oop java_lang_reflect_Method::signature(oop method) { 2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2396 assert(has_signature_field(), "signature field must be present"); 2397 return method->obj_field(signature_offset); 2398 } 2399 2400 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2402 assert(has_signature_field(), "signature field must be present"); 2403 method->obj_field_put(signature_offset, value); 2404 } 2405 2406 bool java_lang_reflect_Method::has_annotations_field() { 2407 return (annotations_offset >= 0); 2408 } 2409 2410 oop java_lang_reflect_Method::annotations(oop method) { 2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2412 assert(has_annotations_field(), "annotations field must be present"); 2413 return method->obj_field(annotations_offset); 2414 } 2415 2416 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2417 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2418 assert(has_annotations_field(), "annotations field must be present"); 2419 method->obj_field_put(annotations_offset, value); 2420 } 2421 2422 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2423 return (parameter_annotations_offset >= 0); 2424 } 2425 2426 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2428 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2429 return method->obj_field(parameter_annotations_offset); 2430 } 2431 2432 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2434 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2435 method->obj_field_put(parameter_annotations_offset, value); 2436 } 2437 2438 bool java_lang_reflect_Method::has_annotation_default_field() { 2439 return (annotation_default_offset >= 0); 2440 } 2441 2442 oop java_lang_reflect_Method::annotation_default(oop method) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 assert(has_annotation_default_field(), "annotation default field must be present"); 2445 return method->obj_field(annotation_default_offset); 2446 } 2447 2448 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2450 assert(has_annotation_default_field(), "annotation default field must be present"); 2451 method->obj_field_put(annotation_default_offset, value); 2452 } 2453 2454 bool java_lang_reflect_Method::has_type_annotations_field() { 2455 return (type_annotations_offset >= 0); 2456 } 2457 2458 oop java_lang_reflect_Method::type_annotations(oop method) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 assert(has_type_annotations_field(), "type_annotations field must be present"); 2461 return method->obj_field(type_annotations_offset); 2462 } 2463 2464 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2466 assert(has_type_annotations_field(), "type_annotations field must be present"); 2467 method->obj_field_put(type_annotations_offset, value); 2468 } 2469 2470 void java_lang_reflect_Constructor::compute_offsets() { 2471 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2472 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2473 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2474 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2475 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2476 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2477 // The generic signature and annotations fields are only present in 1.5 2478 signature_offset = -1; 2479 annotations_offset = -1; 2480 parameter_annotations_offset = -1; 2481 type_annotations_offset = -1; 2482 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2483 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2484 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2485 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2486 } 2487 2488 Handle java_lang_reflect_Constructor::create(TRAPS) { 2489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2490 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2491 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2492 instanceKlassHandle klass (THREAD, k); 2493 // Ensure it is initialized 2494 klass->initialize(CHECK_NH); 2495 return klass->allocate_instance_handle(THREAD); 2496 } 2497 2498 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2500 return reflect->obj_field(clazz_offset); 2501 } 2502 2503 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2505 reflect->obj_field_put(clazz_offset, value); 2506 } 2507 2508 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2510 return constructor->obj_field(parameterTypes_offset); 2511 } 2512 2513 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2515 constructor->obj_field_put(parameterTypes_offset, value); 2516 } 2517 2518 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2520 return constructor->obj_field(exceptionTypes_offset); 2521 } 2522 2523 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2524 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2525 constructor->obj_field_put(exceptionTypes_offset, value); 2526 } 2527 2528 int java_lang_reflect_Constructor::slot(oop reflect) { 2529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2530 return reflect->int_field(slot_offset); 2531 } 2532 2533 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2534 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2535 reflect->int_field_put(slot_offset, value); 2536 } 2537 2538 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2539 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2540 return constructor->int_field(modifiers_offset); 2541 } 2542 2543 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2544 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2545 constructor->int_field_put(modifiers_offset, value); 2546 } 2547 2548 bool java_lang_reflect_Constructor::has_signature_field() { 2549 return (signature_offset >= 0); 2550 } 2551 2552 oop java_lang_reflect_Constructor::signature(oop constructor) { 2553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2554 assert(has_signature_field(), "signature field must be present"); 2555 return constructor->obj_field(signature_offset); 2556 } 2557 2558 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2559 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2560 assert(has_signature_field(), "signature field must be present"); 2561 constructor->obj_field_put(signature_offset, value); 2562 } 2563 2564 bool java_lang_reflect_Constructor::has_annotations_field() { 2565 return (annotations_offset >= 0); 2566 } 2567 2568 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2569 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2570 assert(has_annotations_field(), "annotations field must be present"); 2571 return constructor->obj_field(annotations_offset); 2572 } 2573 2574 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2576 assert(has_annotations_field(), "annotations field must be present"); 2577 constructor->obj_field_put(annotations_offset, value); 2578 } 2579 2580 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2581 return (parameter_annotations_offset >= 0); 2582 } 2583 2584 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2586 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2587 return method->obj_field(parameter_annotations_offset); 2588 } 2589 2590 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2592 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2593 method->obj_field_put(parameter_annotations_offset, value); 2594 } 2595 2596 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2597 return (type_annotations_offset >= 0); 2598 } 2599 2600 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2602 assert(has_type_annotations_field(), "type_annotations field must be present"); 2603 return constructor->obj_field(type_annotations_offset); 2604 } 2605 2606 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2607 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2608 assert(has_type_annotations_field(), "type_annotations field must be present"); 2609 constructor->obj_field_put(type_annotations_offset, value); 2610 } 2611 2612 void java_lang_reflect_Field::compute_offsets() { 2613 Klass* k = SystemDictionary::reflect_Field_klass(); 2614 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2615 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2616 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2617 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2618 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2619 // The generic signature and annotations fields are only present in 1.5 2620 signature_offset = -1; 2621 annotations_offset = -1; 2622 type_annotations_offset = -1; 2623 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2624 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2625 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2626 } 2627 2628 Handle java_lang_reflect_Field::create(TRAPS) { 2629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2630 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2631 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2632 instanceKlassHandle klass (THREAD, k); 2633 // Ensure it is initialized 2634 klass->initialize(CHECK_NH); 2635 return klass->allocate_instance_handle(THREAD); 2636 } 2637 2638 oop java_lang_reflect_Field::clazz(oop reflect) { 2639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2640 return reflect->obj_field(clazz_offset); 2641 } 2642 2643 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2645 reflect->obj_field_put(clazz_offset, value); 2646 } 2647 2648 oop java_lang_reflect_Field::name(oop field) { 2649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2650 return field->obj_field(name_offset); 2651 } 2652 2653 void java_lang_reflect_Field::set_name(oop field, oop value) { 2654 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2655 field->obj_field_put(name_offset, value); 2656 } 2657 2658 oop java_lang_reflect_Field::type(oop field) { 2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2660 return field->obj_field(type_offset); 2661 } 2662 2663 void java_lang_reflect_Field::set_type(oop field, oop value) { 2664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2665 field->obj_field_put(type_offset, value); 2666 } 2667 2668 int java_lang_reflect_Field::slot(oop reflect) { 2669 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2670 return reflect->int_field(slot_offset); 2671 } 2672 2673 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2675 reflect->int_field_put(slot_offset, value); 2676 } 2677 2678 int java_lang_reflect_Field::modifiers(oop field) { 2679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2680 return field->int_field(modifiers_offset); 2681 } 2682 2683 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2685 field->int_field_put(modifiers_offset, value); 2686 } 2687 2688 bool java_lang_reflect_Field::has_signature_field() { 2689 return (signature_offset >= 0); 2690 } 2691 2692 oop java_lang_reflect_Field::signature(oop field) { 2693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2694 assert(has_signature_field(), "signature field must be present"); 2695 return field->obj_field(signature_offset); 2696 } 2697 2698 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2700 assert(has_signature_field(), "signature field must be present"); 2701 field->obj_field_put(signature_offset, value); 2702 } 2703 2704 bool java_lang_reflect_Field::has_annotations_field() { 2705 return (annotations_offset >= 0); 2706 } 2707 2708 oop java_lang_reflect_Field::annotations(oop field) { 2709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2710 assert(has_annotations_field(), "annotations field must be present"); 2711 return field->obj_field(annotations_offset); 2712 } 2713 2714 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2716 assert(has_annotations_field(), "annotations field must be present"); 2717 field->obj_field_put(annotations_offset, value); 2718 } 2719 2720 bool java_lang_reflect_Field::has_type_annotations_field() { 2721 return (type_annotations_offset >= 0); 2722 } 2723 2724 oop java_lang_reflect_Field::type_annotations(oop field) { 2725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2726 assert(has_type_annotations_field(), "type_annotations field must be present"); 2727 return field->obj_field(type_annotations_offset); 2728 } 2729 2730 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2732 assert(has_type_annotations_field(), "type_annotations field must be present"); 2733 field->obj_field_put(type_annotations_offset, value); 2734 } 2735 2736 void reflect_ConstantPool::compute_offsets() { 2737 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2738 // This null test can be removed post beta 2739 if (k != NULL) { 2740 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2741 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2742 } 2743 } 2744 2745 void java_lang_reflect_Parameter::compute_offsets() { 2746 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2747 if(NULL != k) { 2748 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2749 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2750 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2751 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2752 } 2753 } 2754 2755 Handle java_lang_reflect_Parameter::create(TRAPS) { 2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2757 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2758 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2759 instanceKlassHandle klass (THREAD, k); 2760 // Ensure it is initialized 2761 klass->initialize(CHECK_NH); 2762 return klass->allocate_instance_handle(THREAD); 2763 } 2764 2765 oop java_lang_reflect_Parameter::name(oop param) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 return param->obj_field(name_offset); 2768 } 2769 2770 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 param->obj_field_put(name_offset, value); 2773 } 2774 2775 int java_lang_reflect_Parameter::modifiers(oop param) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 return param->int_field(modifiers_offset); 2778 } 2779 2780 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 param->int_field_put(modifiers_offset, value); 2783 } 2784 2785 int java_lang_reflect_Parameter::index(oop param) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 return param->int_field(index_offset); 2788 } 2789 2790 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 param->int_field_put(index_offset, value); 2793 } 2794 2795 oop java_lang_reflect_Parameter::executable(oop param) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 return param->obj_field(executable_offset); 2798 } 2799 2800 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 param->obj_field_put(executable_offset, value); 2803 } 2804 2805 2806 int java_lang_reflect_Module::loader_offset; 2807 int java_lang_reflect_Module::name_offset; 2808 int java_lang_reflect_Module::_module_entry_offset = -1; 2809 2810 Handle java_lang_reflect_Module::create(Handle loader, Handle module_name, TRAPS) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 2813 Symbol* name = vmSymbols::java_lang_reflect_Module(); 2814 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2815 instanceKlassHandle klass (THREAD, k); 2816 2817 Handle jlrmh = klass->allocate_instance_handle(CHECK_NH); 2818 JavaValue result(T_VOID); 2819 JavaCalls::call_special(&result, jlrmh, KlassHandle(THREAD, klass()), 2820 vmSymbols::object_initializer_name(), 2821 vmSymbols::java_lang_reflect_module_init_signature(), 2822 loader, module_name, CHECK_NH); 2823 return jlrmh; 2824 } 2825 2826 void java_lang_reflect_Module::compute_offsets() { 2827 Klass* k = SystemDictionary::reflect_Module_klass(); 2828 if(NULL != k) { 2829 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2830 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2831 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2832 } 2833 } 2834 2835 2836 oop java_lang_reflect_Module::loader(oop module) { 2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2838 return module->obj_field(loader_offset); 2839 } 2840 2841 void java_lang_reflect_Module::set_loader(oop module, oop value) { 2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2843 module->obj_field_put(loader_offset, value); 2844 } 2845 2846 oop java_lang_reflect_Module::name(oop module) { 2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2848 return module->obj_field(name_offset); 2849 } 2850 2851 void java_lang_reflect_Module::set_name(oop module, oop value) { 2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2853 module->obj_field_put(name_offset, value); 2854 } 2855 2856 ModuleEntry* java_lang_reflect_Module::module_entry(oop module, TRAPS) { 2857 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2858 assert(module != NULL, "module can't be null"); 2859 assert(module->is_oop(), "module must be oop"); 2860 2861 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2862 if (module_entry == NULL) { 2863 // If the inject field containing the ModuleEntry* is null then return the 2864 // class loader's unnamed module. 2865 oop loader = java_lang_reflect_Module::loader(module); 2866 Handle h_loader = Handle(THREAD, loader); 2867 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2868 return loader_cld->modules()->unnamed_module(); 2869 } 2870 return module_entry; 2871 } 2872 2873 void java_lang_reflect_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2874 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2875 assert(module != NULL, "module can't be null"); 2876 assert(module->is_oop(), "module must be oop"); 2877 module->address_field_put(_module_entry_offset, (address)module_entry); 2878 } 2879 2880 Handle reflect_ConstantPool::create(TRAPS) { 2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2882 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2883 instanceKlassHandle klass (THREAD, k); 2884 // Ensure it is initialized 2885 klass->initialize(CHECK_NH); 2886 return klass->allocate_instance_handle(THREAD); 2887 } 2888 2889 2890 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2892 oop mirror = value->pool_holder()->java_mirror(); 2893 // Save the mirror to get back the constant pool. 2894 reflect->obj_field_put(_oop_offset, mirror); 2895 } 2896 2897 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2898 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2899 2900 oop mirror = reflect->obj_field(_oop_offset); 2901 Klass* k = java_lang_Class::as_Klass(mirror); 2902 assert(k->is_instance_klass(), "Must be"); 2903 2904 // Get the constant pool back from the klass. Since class redefinition 2905 // merges the new constant pool into the old, this is essentially the 2906 // same constant pool as the original. If constant pool merging is 2907 // no longer done in the future, this will have to change to save 2908 // the original. 2909 return InstanceKlass::cast(k)->constants(); 2910 } 2911 2912 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2913 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2914 // This null test can be removed post beta 2915 if (k != NULL) { 2916 compute_offset(_base_offset, k, 2917 vmSymbols::base_name(), vmSymbols::object_signature()); 2918 } 2919 } 2920 2921 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2922 Klass* k = SystemDictionary::box_klass(type); 2923 if (k == NULL) return NULL; 2924 instanceKlassHandle h (THREAD, k); 2925 if (!h->is_initialized()) h->initialize(CHECK_0); 2926 return h->allocate_instance(THREAD); 2927 } 2928 2929 2930 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2931 oop box = initialize_and_allocate(type, CHECK_0); 2932 if (box == NULL) return NULL; 2933 switch (type) { 2934 case T_BOOLEAN: 2935 box->bool_field_put(value_offset, value->z); 2936 break; 2937 case T_CHAR: 2938 box->char_field_put(value_offset, value->c); 2939 break; 2940 case T_FLOAT: 2941 box->float_field_put(value_offset, value->f); 2942 break; 2943 case T_DOUBLE: 2944 box->double_field_put(long_value_offset, value->d); 2945 break; 2946 case T_BYTE: 2947 box->byte_field_put(value_offset, value->b); 2948 break; 2949 case T_SHORT: 2950 box->short_field_put(value_offset, value->s); 2951 break; 2952 case T_INT: 2953 box->int_field_put(value_offset, value->i); 2954 break; 2955 case T_LONG: 2956 box->long_field_put(long_value_offset, value->j); 2957 break; 2958 default: 2959 return NULL; 2960 } 2961 return box; 2962 } 2963 2964 2965 BasicType java_lang_boxing_object::basic_type(oop box) { 2966 if (box == NULL) return T_ILLEGAL; 2967 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2968 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2969 return T_ILLEGAL; 2970 return type; 2971 } 2972 2973 2974 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2975 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2976 switch (type) { 2977 case T_BOOLEAN: 2978 value->z = box->bool_field(value_offset); 2979 break; 2980 case T_CHAR: 2981 value->c = box->char_field(value_offset); 2982 break; 2983 case T_FLOAT: 2984 value->f = box->float_field(value_offset); 2985 break; 2986 case T_DOUBLE: 2987 value->d = box->double_field(long_value_offset); 2988 break; 2989 case T_BYTE: 2990 value->b = box->byte_field(value_offset); 2991 break; 2992 case T_SHORT: 2993 value->s = box->short_field(value_offset); 2994 break; 2995 case T_INT: 2996 value->i = box->int_field(value_offset); 2997 break; 2998 case T_LONG: 2999 value->j = box->long_field(long_value_offset); 3000 break; 3001 default: 3002 return T_ILLEGAL; 3003 } // end switch 3004 return type; 3005 } 3006 3007 3008 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3009 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3010 switch (type) { 3011 case T_BOOLEAN: 3012 box->bool_field_put(value_offset, value->z); 3013 break; 3014 case T_CHAR: 3015 box->char_field_put(value_offset, value->c); 3016 break; 3017 case T_FLOAT: 3018 box->float_field_put(value_offset, value->f); 3019 break; 3020 case T_DOUBLE: 3021 box->double_field_put(long_value_offset, value->d); 3022 break; 3023 case T_BYTE: 3024 box->byte_field_put(value_offset, value->b); 3025 break; 3026 case T_SHORT: 3027 box->short_field_put(value_offset, value->s); 3028 break; 3029 case T_INT: 3030 box->int_field_put(value_offset, value->i); 3031 break; 3032 case T_LONG: 3033 box->long_field_put(long_value_offset, value->j); 3034 break; 3035 default: 3036 return T_ILLEGAL; 3037 } // end switch 3038 return type; 3039 } 3040 3041 3042 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3043 switch (type) { 3044 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3045 case T_CHAR: st->print("%d", value->c); break; 3046 case T_BYTE: st->print("%d", value->b); break; 3047 case T_SHORT: st->print("%d", value->s); break; 3048 case T_INT: st->print("%d", value->i); break; 3049 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3050 case T_FLOAT: st->print("%f", value->f); break; 3051 case T_DOUBLE: st->print("%lf", value->d); break; 3052 default: st->print("type %d?", type); break; 3053 } 3054 } 3055 3056 // Support for java_lang_ref_SoftReference 3057 3058 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3059 return ref->long_field(timestamp_offset); 3060 } 3061 3062 jlong java_lang_ref_SoftReference::clock() { 3063 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3064 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3065 return *offset; 3066 } 3067 3068 void java_lang_ref_SoftReference::set_clock(jlong value) { 3069 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3070 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3071 *offset = value; 3072 } 3073 3074 // Support for java_lang_invoke_DirectMethodHandle 3075 3076 int java_lang_invoke_DirectMethodHandle::_member_offset; 3077 3078 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3079 oop member_name = NULL; 3080 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3081 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3082 if (is_dmh) { 3083 member_name = dmh->obj_field(member_offset_in_bytes()); 3084 } 3085 return member_name; 3086 } 3087 3088 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3089 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 3090 if (klass_oop != NULL) { 3091 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3092 } 3093 } 3094 3095 // Support for java_lang_invoke_MethodHandle 3096 3097 int java_lang_invoke_MethodHandle::_type_offset; 3098 int java_lang_invoke_MethodHandle::_form_offset; 3099 3100 int java_lang_invoke_MemberName::_clazz_offset; 3101 int java_lang_invoke_MemberName::_name_offset; 3102 int java_lang_invoke_MemberName::_type_offset; 3103 int java_lang_invoke_MemberName::_flags_offset; 3104 int java_lang_invoke_MemberName::_vmtarget_offset; 3105 int java_lang_invoke_MemberName::_vmloader_offset; 3106 int java_lang_invoke_MemberName::_vmindex_offset; 3107 3108 int java_lang_invoke_LambdaForm::_vmentry_offset; 3109 3110 void java_lang_invoke_MethodHandle::compute_offsets() { 3111 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 3112 if (klass_oop != NULL) { 3113 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3114 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3115 } 3116 } 3117 3118 void java_lang_invoke_MemberName::compute_offsets() { 3119 Klass* klass_oop = SystemDictionary::MemberName_klass(); 3120 if (klass_oop != NULL) { 3121 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3122 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 3123 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 3124 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 3125 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3126 } 3127 } 3128 3129 void java_lang_invoke_LambdaForm::compute_offsets() { 3130 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 3131 if (klass_oop != NULL) { 3132 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3133 } 3134 } 3135 3136 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3137 return obj != NULL && is_subclass(obj->klass()); 3138 } 3139 3140 3141 oop java_lang_invoke_MethodHandle::type(oop mh) { 3142 return mh->obj_field(_type_offset); 3143 } 3144 3145 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3146 mh->obj_field_put(_type_offset, mtype); 3147 } 3148 3149 oop java_lang_invoke_MethodHandle::form(oop mh) { 3150 assert(_form_offset != 0, ""); 3151 return mh->obj_field(_form_offset); 3152 } 3153 3154 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3155 assert(_form_offset != 0, ""); 3156 mh->obj_field_put(_form_offset, lform); 3157 } 3158 3159 /// MemberName accessors 3160 3161 oop java_lang_invoke_MemberName::clazz(oop mname) { 3162 assert(is_instance(mname), "wrong type"); 3163 return mname->obj_field(_clazz_offset); 3164 } 3165 3166 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3167 assert(is_instance(mname), "wrong type"); 3168 mname->obj_field_put(_clazz_offset, clazz); 3169 } 3170 3171 oop java_lang_invoke_MemberName::name(oop mname) { 3172 assert(is_instance(mname), "wrong type"); 3173 return mname->obj_field(_name_offset); 3174 } 3175 3176 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3177 assert(is_instance(mname), "wrong type"); 3178 mname->obj_field_put(_name_offset, name); 3179 } 3180 3181 oop java_lang_invoke_MemberName::type(oop mname) { 3182 assert(is_instance(mname), "wrong type"); 3183 return mname->obj_field(_type_offset); 3184 } 3185 3186 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3187 assert(is_instance(mname), "wrong type"); 3188 mname->obj_field_put(_type_offset, type); 3189 } 3190 3191 int java_lang_invoke_MemberName::flags(oop mname) { 3192 assert(is_instance(mname), "wrong type"); 3193 return mname->int_field(_flags_offset); 3194 } 3195 3196 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3197 assert(is_instance(mname), "wrong type"); 3198 mname->int_field_put(_flags_offset, flags); 3199 } 3200 3201 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 3202 assert(is_instance(mname), "wrong type"); 3203 return (Metadata*)mname->address_field(_vmtarget_offset); 3204 } 3205 3206 bool java_lang_invoke_MemberName::is_method(oop mname) { 3207 assert(is_instance(mname), "must be MemberName"); 3208 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3209 } 3210 3211 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 3212 assert(is_instance(mname), "wrong type"); 3213 // check the type of the vmtarget 3214 oop dependency = NULL; 3215 if (ref != NULL) { 3216 switch (flags(mname) & (MN_IS_METHOD | 3217 MN_IS_CONSTRUCTOR | 3218 MN_IS_FIELD)) { 3219 case MN_IS_METHOD: 3220 case MN_IS_CONSTRUCTOR: 3221 assert(ref->is_method(), "should be a method"); 3222 dependency = ((Method*)ref)->method_holder()->java_mirror(); 3223 break; 3224 case MN_IS_FIELD: 3225 assert(ref->is_klass(), "should be a class"); 3226 dependency = ((Klass*)ref)->java_mirror(); 3227 break; 3228 default: 3229 ShouldNotReachHere(); 3230 } 3231 } 3232 mname->address_field_put(_vmtarget_offset, (address)ref); 3233 // Add a reference to the loader (actually mirror because anonymous classes will not have 3234 // distinct loaders) to ensure the metadata is kept alive 3235 // This mirror may be different than the one in clazz field. 3236 mname->obj_field_put(_vmloader_offset, dependency); 3237 } 3238 3239 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3240 assert(is_instance(mname), "wrong type"); 3241 return (intptr_t) mname->address_field(_vmindex_offset); 3242 } 3243 3244 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3245 assert(is_instance(mname), "wrong type"); 3246 mname->address_field_put(_vmindex_offset, (address) index); 3247 } 3248 3249 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3250 assert(is_instance(lform), "wrong type"); 3251 return lform->obj_field(_vmentry_offset); 3252 } 3253 3254 3255 // Support for java_lang_invoke_MethodType 3256 3257 int java_lang_invoke_MethodType::_rtype_offset; 3258 int java_lang_invoke_MethodType::_ptypes_offset; 3259 3260 void java_lang_invoke_MethodType::compute_offsets() { 3261 Klass* k = SystemDictionary::MethodType_klass(); 3262 if (k != NULL) { 3263 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3264 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3265 } 3266 } 3267 3268 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3269 st->print("("); 3270 objArrayOop pts = ptypes(mt); 3271 for (int i = 0, limit = pts->length(); i < limit; i++) { 3272 java_lang_Class::print_signature(pts->obj_at(i), st); 3273 } 3274 st->print(")"); 3275 java_lang_Class::print_signature(rtype(mt), st); 3276 } 3277 3278 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3279 ResourceMark rm; 3280 stringStream buffer(128); 3281 print_signature(mt, &buffer); 3282 const char* sigstr = buffer.base(); 3283 int siglen = (int) buffer.size(); 3284 Symbol *name; 3285 if (!intern_if_not_found) { 3286 name = SymbolTable::probe(sigstr, siglen); 3287 } else { 3288 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3289 } 3290 return name; 3291 } 3292 3293 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3294 if (mt1 == mt2) 3295 return true; 3296 if (rtype(mt1) != rtype(mt2)) 3297 return false; 3298 if (ptype_count(mt1) != ptype_count(mt2)) 3299 return false; 3300 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3301 if (ptype(mt1, i) != ptype(mt2, i)) 3302 return false; 3303 } 3304 return true; 3305 } 3306 3307 oop java_lang_invoke_MethodType::rtype(oop mt) { 3308 assert(is_instance(mt), "must be a MethodType"); 3309 return mt->obj_field(_rtype_offset); 3310 } 3311 3312 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3313 assert(is_instance(mt), "must be a MethodType"); 3314 return (objArrayOop) mt->obj_field(_ptypes_offset); 3315 } 3316 3317 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3318 return ptypes(mt)->obj_at(idx); 3319 } 3320 3321 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3322 return ptypes(mt)->length(); 3323 } 3324 3325 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3326 objArrayOop pts = ptypes(mt); 3327 int count = pts->length(); 3328 int slots = 0; 3329 for (int i = 0; i < count; i++) { 3330 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3331 slots += type2size[bt]; 3332 } 3333 return slots; 3334 } 3335 3336 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3337 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3338 return type2size[bt]; 3339 } 3340 3341 3342 // Support for java_lang_invoke_CallSite 3343 3344 int java_lang_invoke_CallSite::_target_offset; 3345 int java_lang_invoke_CallSite::_context_offset; 3346 3347 void java_lang_invoke_CallSite::compute_offsets() { 3348 Klass* k = SystemDictionary::CallSite_klass(); 3349 if (k != NULL) { 3350 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3351 compute_offset(_context_offset, k, vmSymbols::context_name(), 3352 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3353 } 3354 } 3355 3356 oop java_lang_invoke_CallSite::context(oop call_site) { 3357 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3358 3359 oop dep_oop = call_site->obj_field(_context_offset); 3360 return dep_oop; 3361 } 3362 3363 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3364 3365 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3366 3367 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3368 Klass* k = SystemDictionary::Context_klass(); 3369 if (k != NULL) { 3370 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3371 } 3372 } 3373 3374 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3375 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3376 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3377 DependencyContext dep_ctx(vmdeps_addr); 3378 return dep_ctx; 3379 } 3380 3381 // Support for java_security_AccessControlContext 3382 3383 int java_security_AccessControlContext::_context_offset = 0; 3384 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3385 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3386 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3387 3388 void java_security_AccessControlContext::compute_offsets() { 3389 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3390 fieldDescriptor fd; 3391 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3392 3393 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3394 fatal("Invalid layout of java.security.AccessControlContext"); 3395 } 3396 _context_offset = fd.offset(); 3397 3398 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3399 fatal("Invalid layout of java.security.AccessControlContext"); 3400 } 3401 _privilegedContext_offset = fd.offset(); 3402 3403 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3404 fatal("Invalid layout of java.security.AccessControlContext"); 3405 } 3406 _isPrivileged_offset = fd.offset(); 3407 3408 // The offset may not be present for bootstrapping with older JDK. 3409 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3410 _isAuthorized_offset = fd.offset(); 3411 } 3412 } 3413 3414 3415 bool java_security_AccessControlContext::is_authorized(Handle context) { 3416 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3417 assert(_isAuthorized_offset != -1, "should be set"); 3418 return context->bool_field(_isAuthorized_offset) != 0; 3419 } 3420 3421 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3422 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3423 // Ensure klass is initialized 3424 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3425 // Allocate result 3426 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3427 // Fill in values 3428 result->obj_field_put(_context_offset, context()); 3429 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3430 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3431 // whitelist AccessControlContexts created by the JVM if present 3432 if (_isAuthorized_offset != -1) { 3433 result->bool_field_put(_isAuthorized_offset, true); 3434 } 3435 return result; 3436 } 3437 3438 3439 // Support for java_lang_ClassLoader 3440 3441 bool java_lang_ClassLoader::offsets_computed = false; 3442 int java_lang_ClassLoader::_loader_data_offset = -1; 3443 int java_lang_ClassLoader::parallelCapable_offset = -1; 3444 int java_lang_ClassLoader::name_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(name_offset, 3466 k1, vmSymbols::name_name(), vmSymbols::string_signature()); 3467 3468 compute_offset(unnamedModule_offset, 3469 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3470 3471 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3472 } 3473 3474 oop java_lang_ClassLoader::parent(oop loader) { 3475 assert(is_instance(loader), "loader must be oop"); 3476 return loader->obj_field(parent_offset); 3477 } 3478 3479 oop java_lang_ClassLoader::name(oop loader) { 3480 assert(is_instance(loader), "loader must be oop"); 3481 return loader->obj_field(name_offset); 3482 } 3483 3484 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3485 assert(is_instance(loader), "loader must be oop"); 3486 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3487 oop acl = loader; 3488 debug_only(jint loop_count = 0); 3489 // This loop taken verbatim from ClassLoader.java: 3490 do { 3491 acl = parent(acl); 3492 if (cl == acl) { 3493 return true; 3494 } 3495 assert(++loop_count > 0, "loop_count overflow"); 3496 } while (acl != NULL); 3497 return false; 3498 } 3499 3500 bool java_lang_ClassLoader::is_instance(oop obj) { 3501 return obj != NULL && is_subclass(obj->klass()); 3502 } 3503 3504 3505 // For class loader classes, parallelCapable defined 3506 // based on non-null field 3507 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3508 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3509 if (parallelCapable_offset == -1) { 3510 // Default for backward compatibility is false 3511 return false; 3512 } 3513 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3514 } 3515 3516 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3517 // Fix for 4474172; see evaluation for more details 3518 loader = non_reflection_class_loader(loader); 3519 3520 oop cl = SystemDictionary::java_system_loader(); 3521 while(cl != NULL) { 3522 if (cl == loader) return true; 3523 cl = parent(cl); 3524 } 3525 return false; 3526 } 3527 3528 // Return true if this is one of the class loaders associated with 3529 // the generated bytecodes for reflection. 3530 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3531 if (loader != NULL) { 3532 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3533 // This might be null in non-1.4 JDKs 3534 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3535 } 3536 return false; 3537 } 3538 3539 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3540 // See whether this is one of the class loaders associated with 3541 // the generated bytecodes for reflection, and if so, "magically" 3542 // delegate to its parent to prevent class loading from occurring 3543 // in places where applications using reflection didn't expect it. 3544 if (is_reflection_class_loader(loader)) { 3545 return parent(loader); 3546 } 3547 return loader; 3548 } 3549 3550 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3551 assert(is_instance(loader), "loader must be oop"); 3552 return loader->obj_field(unnamedModule_offset); 3553 } 3554 3555 // Support for java_lang_System 3556 int java_lang_System::in_offset_in_bytes() { 3557 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3558 } 3559 3560 3561 int java_lang_System::out_offset_in_bytes() { 3562 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3563 } 3564 3565 3566 int java_lang_System::err_offset_in_bytes() { 3567 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3568 } 3569 3570 3571 bool java_lang_System::has_security_manager() { 3572 InstanceKlass* ik = SystemDictionary::System_klass(); 3573 address addr = ik->static_field_addr(static_security_offset); 3574 if (UseCompressedOops) { 3575 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3576 } else { 3577 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3578 } 3579 } 3580 3581 int java_lang_Class::_klass_offset; 3582 int java_lang_Class::_array_klass_offset; 3583 int java_lang_Class::_oop_size_offset; 3584 int java_lang_Class::_static_oop_field_count_offset; 3585 int java_lang_Class::_class_loader_offset; 3586 int java_lang_Class::_module_offset; 3587 int java_lang_Class::_protection_domain_offset; 3588 int java_lang_Class::_component_mirror_offset; 3589 int java_lang_Class::_init_lock_offset; 3590 int java_lang_Class::_signers_offset; 3591 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3592 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3593 int java_lang_Throwable::backtrace_offset; 3594 int java_lang_Throwable::detailMessage_offset; 3595 int java_lang_Throwable::stackTrace_offset; 3596 int java_lang_Throwable::depth_offset; 3597 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3598 int java_lang_reflect_AccessibleObject::override_offset; 3599 int java_lang_reflect_Method::clazz_offset; 3600 int java_lang_reflect_Method::name_offset; 3601 int java_lang_reflect_Method::returnType_offset; 3602 int java_lang_reflect_Method::parameterTypes_offset; 3603 int java_lang_reflect_Method::exceptionTypes_offset; 3604 int java_lang_reflect_Method::slot_offset; 3605 int java_lang_reflect_Method::modifiers_offset; 3606 int java_lang_reflect_Method::signature_offset; 3607 int java_lang_reflect_Method::annotations_offset; 3608 int java_lang_reflect_Method::parameter_annotations_offset; 3609 int java_lang_reflect_Method::annotation_default_offset; 3610 int java_lang_reflect_Method::type_annotations_offset; 3611 int java_lang_reflect_Constructor::clazz_offset; 3612 int java_lang_reflect_Constructor::parameterTypes_offset; 3613 int java_lang_reflect_Constructor::exceptionTypes_offset; 3614 int java_lang_reflect_Constructor::slot_offset; 3615 int java_lang_reflect_Constructor::modifiers_offset; 3616 int java_lang_reflect_Constructor::signature_offset; 3617 int java_lang_reflect_Constructor::annotations_offset; 3618 int java_lang_reflect_Constructor::parameter_annotations_offset; 3619 int java_lang_reflect_Constructor::type_annotations_offset; 3620 int java_lang_reflect_Field::clazz_offset; 3621 int java_lang_reflect_Field::name_offset; 3622 int java_lang_reflect_Field::type_offset; 3623 int java_lang_reflect_Field::slot_offset; 3624 int java_lang_reflect_Field::modifiers_offset; 3625 int java_lang_reflect_Field::signature_offset; 3626 int java_lang_reflect_Field::annotations_offset; 3627 int java_lang_reflect_Field::type_annotations_offset; 3628 int java_lang_reflect_Parameter::name_offset; 3629 int java_lang_reflect_Parameter::modifiers_offset; 3630 int java_lang_reflect_Parameter::index_offset; 3631 int java_lang_reflect_Parameter::executable_offset; 3632 int java_lang_boxing_object::value_offset; 3633 int java_lang_boxing_object::long_value_offset; 3634 int java_lang_ref_Reference::referent_offset; 3635 int java_lang_ref_Reference::queue_offset; 3636 int java_lang_ref_Reference::next_offset; 3637 int java_lang_ref_Reference::discovered_offset; 3638 int java_lang_ref_Reference::number_of_fake_oop_fields; 3639 int java_lang_ref_SoftReference::timestamp_offset; 3640 int java_lang_ref_SoftReference::static_clock_offset; 3641 int java_lang_ClassLoader::parent_offset; 3642 int java_lang_System::static_in_offset; 3643 int java_lang_System::static_out_offset; 3644 int java_lang_System::static_err_offset; 3645 int java_lang_System::static_security_offset; 3646 int java_lang_StackTraceElement::methodName_offset; 3647 int java_lang_StackTraceElement::fileName_offset; 3648 int java_lang_StackTraceElement::lineNumber_offset; 3649 int java_lang_StackTraceElement::moduleName_offset; 3650 int java_lang_StackTraceElement::moduleVersion_offset; 3651 int java_lang_StackTraceElement::classLoaderName_offset; 3652 int java_lang_StackTraceElement::declaringClass_offset; 3653 int java_lang_StackTraceElement::classOrLoaderModuleClassName_offset; 3654 int java_lang_StackFrameInfo::_declaringClass_offset; 3655 int java_lang_StackFrameInfo::_memberName_offset; 3656 int java_lang_StackFrameInfo::_bci_offset; 3657 int java_lang_StackFrameInfo::_version_offset; 3658 int java_lang_LiveStackFrameInfo::_monitors_offset; 3659 int java_lang_LiveStackFrameInfo::_locals_offset; 3660 int java_lang_LiveStackFrameInfo::_operands_offset; 3661 int java_lang_AssertionStatusDirectives::classes_offset; 3662 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3663 int java_lang_AssertionStatusDirectives::packages_offset; 3664 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3665 int java_lang_AssertionStatusDirectives::deflt_offset; 3666 int java_nio_Buffer::_limit_offset; 3667 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3668 int reflect_ConstantPool::_oop_offset; 3669 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3670 3671 3672 // Support for java_lang_StackTraceElement 3673 3674 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3675 element->obj_field_put(fileName_offset, value); 3676 } 3677 3678 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3679 element->obj_field_put(declaringClass_offset, value); 3680 } 3681 3682 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3683 element->obj_field_put(methodName_offset, value); 3684 } 3685 3686 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3687 element->int_field_put(lineNumber_offset, value); 3688 } 3689 3690 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3691 element->obj_field_put(moduleName_offset, value); 3692 } 3693 3694 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3695 element->obj_field_put(moduleVersion_offset, value); 3696 } 3697 3698 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 3699 element->obj_field_put(classLoaderName_offset, value); 3700 } 3701 3702 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 3703 element->obj_field_put(classOrLoaderModuleClassName_offset, value); 3704 } 3705 3706 // Support for java_lang_StackFrameInfo 3707 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3708 element->obj_field_put(_declaringClass_offset, value); 3709 } 3710 3711 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3712 element->short_field_put(_version_offset, value); 3713 } 3714 3715 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3716 element->int_field_put(_bci_offset, value); 3717 } 3718 3719 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3720 element->obj_field_put(_monitors_offset, value); 3721 } 3722 3723 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3724 element->obj_field_put(_locals_offset, value); 3725 } 3726 3727 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3728 element->obj_field_put(_operands_offset, value); 3729 } 3730 3731 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3732 3733 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3734 o->obj_field_put(classes_offset, val); 3735 } 3736 3737 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3738 o->obj_field_put(classEnabled_offset, val); 3739 } 3740 3741 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3742 o->obj_field_put(packages_offset, val); 3743 } 3744 3745 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3746 o->obj_field_put(packageEnabled_offset, val); 3747 } 3748 3749 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3750 o->bool_field_put(deflt_offset, val); 3751 } 3752 3753 3754 // Support for intrinsification of java.nio.Buffer.checkIndex 3755 int java_nio_Buffer::limit_offset() { 3756 return _limit_offset; 3757 } 3758 3759 3760 void java_nio_Buffer::compute_offsets() { 3761 Klass* k = SystemDictionary::nio_Buffer_klass(); 3762 assert(k != NULL, "must be loaded in 1.4+"); 3763 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3764 } 3765 3766 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3767 if (_owner_offset != 0) return; 3768 3769 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3770 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3771 compute_offset(_owner_offset, k, 3772 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3773 } 3774 3775 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3776 assert(_owner_offset != 0, "Must be initialized"); 3777 return obj->obj_field(_owner_offset); 3778 } 3779 3780 // Compute hard-coded offsets 3781 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3782 // are not available to determine the offset_of_static_fields. 3783 void JavaClasses::compute_hard_coded_offsets() { 3784 const int x = heapOopSize; 3785 const int header = instanceOopDesc::base_offset_in_bytes(); 3786 3787 // Throwable Class 3788 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3789 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3790 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3791 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3792 3793 // java_lang_boxing_object 3794 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3795 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3796 3797 // java_lang_ref_Reference: 3798 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3799 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3800 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3801 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3802 // Artificial fields for java_lang_ref_Reference 3803 // The first field is for the discovered field added in 1.4 3804 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3805 3806 // java_lang_ref_SoftReference Class 3807 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3808 // Don't multiply static fields because they are always in wordSize units 3809 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3810 3811 // java_lang_ClassLoader 3812 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3813 3814 // java_lang_System 3815 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3816 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3817 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3818 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3819 3820 // java_lang_StackTraceElement 3821 java_lang_StackTraceElement::classOrLoaderModuleClassName_offset= java_lang_StackTraceElement::hc_classOrLoaderModuleClassName_offset* x + header; 3822 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header; 3823 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3824 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3825 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3826 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3827 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3828 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3829 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3830 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3831 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3832 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3833 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3834 3835 } 3836 3837 3838 // Compute non-hard-coded field offsets of all the classes in this file 3839 void JavaClasses::compute_offsets() { 3840 // java_lang_Class::compute_offsets was called earlier in bootstrap 3841 java_lang_ClassLoader::compute_offsets(); 3842 java_lang_Throwable::compute_offsets(); 3843 java_lang_Thread::compute_offsets(); 3844 java_lang_ThreadGroup::compute_offsets(); 3845 java_lang_invoke_MethodHandle::compute_offsets(); 3846 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3847 java_lang_invoke_MemberName::compute_offsets(); 3848 java_lang_invoke_LambdaForm::compute_offsets(); 3849 java_lang_invoke_MethodType::compute_offsets(); 3850 java_lang_invoke_CallSite::compute_offsets(); 3851 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3852 java_security_AccessControlContext::compute_offsets(); 3853 // Initialize reflection classes. The layouts of these classes 3854 // changed with the new reflection implementation in JDK 1.4, and 3855 // since the Universe doesn't know what JDK version it is until this 3856 // point we defer computation of these offsets until now. 3857 java_lang_reflect_AccessibleObject::compute_offsets(); 3858 java_lang_reflect_Method::compute_offsets(); 3859 java_lang_reflect_Constructor::compute_offsets(); 3860 java_lang_reflect_Field::compute_offsets(); 3861 java_nio_Buffer::compute_offsets(); 3862 reflect_ConstantPool::compute_offsets(); 3863 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3864 java_lang_reflect_Parameter::compute_offsets(); 3865 java_lang_reflect_Module::compute_offsets(); 3866 java_lang_StackFrameInfo::compute_offsets(); 3867 java_lang_LiveStackFrameInfo::compute_offsets(); 3868 3869 // generated interpreter code wants to know about the offsets we just computed: 3870 AbstractAssembler::update_delayed_values(); 3871 } 3872 3873 #ifndef PRODUCT 3874 3875 // These functions exist to assert the validity of hard-coded field offsets to guard 3876 // against changes in the class files 3877 3878 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3879 EXCEPTION_MARK; 3880 fieldDescriptor fd; 3881 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3882 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3883 instanceKlassHandle h_klass (THREAD, k); 3884 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3885 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3886 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3887 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3888 return false; 3889 } 3890 if (fd.is_static()) { 3891 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3892 return false; 3893 } 3894 if (fd.offset() == hardcoded_offset ) { 3895 return true; 3896 } else { 3897 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3898 klass_name, field_name, hardcoded_offset, fd.offset()); 3899 return false; 3900 } 3901 } 3902 3903 3904 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3905 EXCEPTION_MARK; 3906 fieldDescriptor fd; 3907 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3908 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3909 instanceKlassHandle h_klass (THREAD, k); 3910 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3911 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3912 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3913 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3914 return false; 3915 } 3916 if (!fd.is_static()) { 3917 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3918 return false; 3919 } 3920 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3921 return true; 3922 } else { 3923 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()); 3924 return false; 3925 } 3926 } 3927 3928 3929 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3930 EXCEPTION_MARK; 3931 fieldDescriptor fd; 3932 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3933 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3934 instanceKlassHandle h_klass (THREAD, k); 3935 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3936 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3937 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3938 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3939 return false; 3940 } 3941 if (!fd.is_static() || !fd.has_initial_value()) { 3942 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3943 return false; 3944 } 3945 if (!fd.initial_value_tag().is_int()) { 3946 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3947 return false; 3948 } 3949 jint field_value = fd.int_initial_value(); 3950 if (field_value == hardcoded_constant) { 3951 return true; 3952 } else { 3953 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); 3954 return false; 3955 } 3956 } 3957 3958 3959 // Check the hard-coded field offsets of all the classes in this file 3960 3961 void JavaClasses::check_offsets() { 3962 bool valid = true; 3963 HandleMark hm; 3964 3965 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3966 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3967 3968 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3969 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3970 3971 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3972 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3973 3974 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3975 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3976 3977 // java.lang.String 3978 3979 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 3980 if (java_lang_String::has_hash_field()) { 3981 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3982 } 3983 if (java_lang_String::has_coder_field()) { 3984 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 3985 } 3986 3987 // java.lang.Class 3988 3989 // Fake fields 3990 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3991 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3992 3993 // java.lang.Throwable 3994 3995 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3996 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3997 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3998 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 3999 4000 // Boxed primitive objects (java_lang_boxing_object) 4001 4002 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4003 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4004 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4005 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4006 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4007 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4008 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4009 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4010 4011 // java.lang.ClassLoader 4012 4013 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 4014 4015 // java.lang.System 4016 4017 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4018 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4019 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4020 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4021 4022 // java.lang.StackTraceElement 4023 4024 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classOrLoaderModuleClassName, "Ljava/lang/Object;"); 4025 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;"); 4026 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;"); 4027 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;"); 4028 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4029 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4030 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4031 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4032 4033 // java.lang.ref.Reference 4034 4035 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4036 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4037 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4038 // Fake field 4039 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4040 4041 // java.lang.ref.SoftReference 4042 4043 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4044 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4045 4046 // java.lang.AssertionStatusDirectives 4047 // 4048 // The CheckAssertionStatusDirectives boolean can be removed from here and 4049 // globals.hpp after the AssertionStatusDirectives class has been integrated 4050 // into merlin "for some time." Without it, the vm will fail with early 4051 // merlin builds. 4052 4053 if (CheckAssertionStatusDirectives) { 4054 const char* nm = "java/lang/AssertionStatusDirectives"; 4055 const char* sig = "[Ljava/lang/String;"; 4056 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4057 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4058 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4059 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4060 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4061 } 4062 4063 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4064 } 4065 4066 #endif // PRODUCT 4067 4068 int InjectedField::compute_offset() { 4069 InstanceKlass* ik = InstanceKlass::cast(klass()); 4070 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4071 if (!may_be_java && !fs.access_flags().is_internal()) { 4072 // Only look at injected fields 4073 continue; 4074 } 4075 if (fs.name() == name() && fs.signature() == signature()) { 4076 return fs.offset(); 4077 } 4078 } 4079 ResourceMark rm; 4080 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)" : ""); 4081 #ifndef PRODUCT 4082 ik->print(); 4083 tty->print_cr("all fields:"); 4084 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4085 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4086 } 4087 #endif //PRODUCT 4088 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4089 return -1; 4090 } 4091 4092 void javaClasses_init() { 4093 JavaClasses::compute_offsets(); 4094 JavaClasses::check_offsets(); 4095 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4096 }