1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "memory/oopFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.inline.hpp" 39 #include "oops/fieldStreams.hpp" 40 #include "oops/instanceKlass.hpp" 41 #include "oops/instanceMirrorKlass.hpp" 42 #include "oops/klass.hpp" 43 #include "oops/method.hpp" 44 #include "oops/objArrayOop.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "oops/symbol.hpp" 47 #include "oops/typeArrayOop.hpp" 48 #include "prims/resolvedMethodTable.hpp" 49 #include "runtime/fieldDescriptor.hpp" 50 #include "runtime/handles.inline.hpp" 51 #include "runtime/interfaceSupport.hpp" 52 #include "runtime/java.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/safepoint.hpp" 55 #include "runtime/thread.inline.hpp" 56 #include "runtime/vframe.hpp" 57 #include "utilities/align.hpp" 58 #include "utilities/preserveException.hpp" 59 60 #if INCLUDE_JVMCI 61 #include "jvmci/jvmciJavaClasses.hpp" 62 #endif 63 64 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 65 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 66 67 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 68 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 69 70 InjectedField JavaClasses::_injected_fields[] = { 71 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 72 }; 73 74 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 75 return _injected_fields[id].compute_offset(); 76 } 77 78 79 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 80 *field_count = 0; 81 82 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 83 if (sid == vmSymbols::NO_SID) { 84 // Only well known classes can inject fields 85 return NULL; 86 } 87 88 int count = 0; 89 int start = -1; 90 91 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 92 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 93 count++; \ 94 if (start == -1) start = klass##_##name##_enum; \ 95 } 96 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 97 #undef LOOKUP_INJECTED_FIELD 98 99 if (start != -1) { 100 *field_count = count; 101 return _injected_fields + start; 102 } 103 return NULL; 104 } 105 106 107 static bool find_field(InstanceKlass* ik, 108 Symbol* name_symbol, Symbol* signature_symbol, 109 fieldDescriptor* fd, 110 bool is_static = false, bool allow_super = false) { 111 if (allow_super || is_static) { 112 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 113 } else { 114 return ik->find_local_field(name_symbol, signature_symbol, fd); 115 } 116 } 117 118 // Helpful routine for computing field offsets at run time rather than hardcoding them 119 static void 120 compute_offset(int &dest_offset, 121 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 122 bool is_static = false, bool allow_super = false) { 123 fieldDescriptor fd; 124 InstanceKlass* ik = InstanceKlass::cast(klass); 125 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 126 ResourceMark rm; 127 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 128 #ifndef PRODUCT 129 ik->print(); 130 tty->print_cr("all fields:"); 131 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 132 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 133 } 134 #endif //PRODUCT 135 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 136 } 137 dest_offset = fd.offset(); 138 } 139 140 // Same as above but for "optional" offsets that might not be present in certain JDK versions 141 static void 142 compute_optional_offset(int& dest_offset, 143 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 144 bool allow_super = false) { 145 fieldDescriptor fd; 146 InstanceKlass* ik = InstanceKlass::cast(klass); 147 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 148 dest_offset = fd.offset(); 149 } 150 } 151 152 153 int java_lang_String::value_offset = 0; 154 int java_lang_String::hash_offset = 0; 155 int java_lang_String::coder_offset = 0; 156 157 bool java_lang_String::initialized = false; 158 159 bool java_lang_String::is_instance(oop obj) { 160 return is_instance_inlined(obj); 161 } 162 163 void java_lang_String::compute_offsets() { 164 assert(!initialized, "offsets should be initialized only once"); 165 166 Klass* k = SystemDictionary::String_klass(); 167 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 168 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 169 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 170 171 initialized = true; 172 } 173 174 class CompactStringsFixup : public FieldClosure { 175 private: 176 bool _value; 177 178 public: 179 CompactStringsFixup(bool value) : _value(value) {} 180 181 void do_field(fieldDescriptor* fd) { 182 if (fd->name() == vmSymbols::compact_strings_name()) { 183 oop mirror = fd->field_holder()->java_mirror(); 184 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 185 assert(mirror != NULL, "String must have mirror already"); 186 mirror->bool_field_put(fd->offset(), _value); 187 } 188 } 189 }; 190 191 void java_lang_String::set_compact_strings(bool value) { 192 CompactStringsFixup fix(value); 193 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 194 } 195 196 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 197 assert(initialized, "Must be initialized"); 198 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 199 200 // Create the String object first, so there's a chance that the String 201 // and the char array it points to end up in the same cache line. 202 oop obj; 203 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 204 205 // Create the char array. The String object must be handlized here 206 // because GC can happen as a result of the allocation attempt. 207 Handle h_obj(THREAD, obj); 208 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 209 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 210 211 // Point the String at the char array 212 obj = h_obj(); 213 set_value(obj, buffer); 214 // No need to zero the offset, allocation zero'ed the entire String object 215 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 216 return h_obj; 217 } 218 219 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 220 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 221 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 222 typeArrayOop buffer = value(h_obj()); 223 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 224 if (is_latin1) { 225 for (int index = 0; index < length; index++) { 226 buffer->byte_at_put(index, (jbyte)unicode[index]); 227 } 228 } else { 229 for (int index = 0; index < length; index++) { 230 buffer->char_at_put(index, unicode[index]); 231 } 232 } 233 234 #ifdef ASSERT 235 { 236 ResourceMark rm; 237 char* expected = UNICODE::as_utf8(unicode, length); 238 char* actual = as_utf8_string(h_obj()); 239 if (strcmp(expected, actual) != 0) { 240 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 241 ShouldNotReachHere(); 242 } 243 } 244 #endif 245 246 return h_obj; 247 } 248 249 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 250 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 251 return h_obj(); 252 } 253 254 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 255 if (utf8_str == NULL) { 256 return Handle(); 257 } 258 bool has_multibyte, is_latin1; 259 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 260 if (!CompactStrings) { 261 has_multibyte = true; 262 is_latin1 = false; 263 } 264 265 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 266 if (length > 0) { 267 if (!has_multibyte) { 268 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 269 } else if (is_latin1) { 270 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 271 } else { 272 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 273 } 274 } 275 276 #ifdef ASSERT 277 // This check is too strict because the input string is not necessarily valid UTF8. 278 // For example, it may be created with arbitrary content via jni_NewStringUTF. 279 /* 280 { 281 ResourceMark rm; 282 const char* expected = utf8_str; 283 char* actual = as_utf8_string(h_obj()); 284 if (strcmp(expected, actual) != 0) { 285 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 286 ShouldNotReachHere(); 287 } 288 } 289 */ 290 #endif 291 292 return h_obj; 293 } 294 295 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 296 Handle h_obj = create_from_str(utf8_str, CHECK_0); 297 return h_obj(); 298 } 299 300 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 301 const char* utf8_str = (char*)symbol->bytes(); 302 int utf8_len = symbol->utf8_length(); 303 304 bool has_multibyte, is_latin1; 305 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 306 if (!CompactStrings) { 307 has_multibyte = true; 308 is_latin1 = false; 309 } 310 311 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 312 if (length > 0) { 313 if (!has_multibyte) { 314 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 315 } else if (is_latin1) { 316 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 317 } else { 318 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 319 } 320 } 321 322 #ifdef ASSERT 323 { 324 ResourceMark rm; 325 const char* expected = symbol->as_utf8(); 326 char* actual = as_utf8_string(h_obj()); 327 if (strncmp(expected, actual, utf8_len) != 0) { 328 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 329 ShouldNotReachHere(); 330 } 331 } 332 #endif 333 334 return h_obj; 335 } 336 337 // Converts a C string to a Java String based on current encoding 338 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 339 assert(str != NULL, "bad arguments"); 340 341 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 342 static to_java_string_fn_t _to_java_string_fn = NULL; 343 344 if (_to_java_string_fn == NULL) { 345 void *lib_handle = os::native_java_library(); 346 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 347 if (_to_java_string_fn == NULL) { 348 fatal("NewStringPlatform missing"); 349 } 350 } 351 352 jstring js = NULL; 353 { JavaThread* thread = (JavaThread*)THREAD; 354 assert(thread->is_Java_thread(), "must be java thread"); 355 HandleMark hm(thread); 356 ThreadToNativeFromVM ttn(thread); 357 js = (_to_java_string_fn)(thread->jni_environment(), str); 358 } 359 return Handle(THREAD, JNIHandles::resolve(js)); 360 } 361 362 // Converts a Java String to a native C string that can be used for 363 // native OS calls. 364 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 365 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 366 static to_platform_string_fn_t _to_platform_string_fn = NULL; 367 368 if (_to_platform_string_fn == NULL) { 369 void *lib_handle = os::native_java_library(); 370 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 371 if (_to_platform_string_fn == NULL) { 372 fatal("GetStringPlatformChars missing"); 373 } 374 } 375 376 char *native_platform_string; 377 { JavaThread* thread = (JavaThread*)THREAD; 378 assert(thread->is_Java_thread(), "must be java thread"); 379 JNIEnv *env = thread->jni_environment(); 380 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 381 bool is_copy; 382 HandleMark hm(thread); 383 ThreadToNativeFromVM ttn(thread); 384 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 385 assert(is_copy == JNI_TRUE, "is_copy value changed"); 386 JNIHandles::destroy_local(js); 387 } 388 return native_platform_string; 389 } 390 391 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 392 oop obj = java_string(); 393 // Typical usage is to convert all '/' to '.' in string. 394 typeArrayOop value = java_lang_String::value(obj); 395 int length = java_lang_String::length(obj); 396 bool is_latin1 = java_lang_String::is_latin1(obj); 397 398 // First check if any from_char exist 399 int index; // Declared outside, used later 400 for (index = 0; index < length; index++) { 401 jchar c = !is_latin1 ? value->char_at(index) : 402 ((jchar) value->byte_at(index)) & 0xff; 403 if (c == from_char) { 404 break; 405 } 406 } 407 if (index == length) { 408 // No from_char, so do not copy. 409 return java_string; 410 } 411 412 // Check if result string will be latin1 413 bool to_is_latin1 = false; 414 415 // Replacement char must be latin1 416 if (CompactStrings && UNICODE::is_latin1(to_char)) { 417 if (is_latin1) { 418 // Source string is latin1 as well 419 to_is_latin1 = true; 420 } else if (!UNICODE::is_latin1(from_char)) { 421 // We are replacing an UTF16 char. Scan string to 422 // check if result can be latin1 encoded. 423 to_is_latin1 = true; 424 for (index = 0; index < length; index++) { 425 jchar c = value->char_at(index); 426 if (c != from_char && !UNICODE::is_latin1(c)) { 427 to_is_latin1 = false; 428 break; 429 } 430 } 431 } 432 } 433 434 // Create new UNICODE (or byte) buffer. Must handlize value because GC 435 // may happen during String and char array creation. 436 typeArrayHandle h_value(THREAD, value); 437 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 438 typeArrayOop from_buffer = h_value(); 439 typeArrayOop to_buffer = java_lang_String::value(string()); 440 441 // Copy contents 442 for (index = 0; index < length; index++) { 443 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 444 ((jchar) from_buffer->byte_at(index)) & 0xff; 445 if (c == from_char) { 446 c = to_char; 447 } 448 if (!to_is_latin1) { 449 to_buffer->char_at_put(index, c); 450 } else { 451 to_buffer->byte_at_put(index, (jbyte) c); 452 } 453 } 454 return string; 455 } 456 457 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 458 typeArrayOop value = java_lang_String::value(java_string); 459 length = java_lang_String::length(java_string); 460 bool is_latin1 = java_lang_String::is_latin1(java_string); 461 462 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 463 if (result != NULL) { 464 if (!is_latin1) { 465 for (int index = 0; index < length; index++) { 466 result[index] = value->char_at(index); 467 } 468 } else { 469 for (int index = 0; index < length; index++) { 470 result[index] = ((jchar) value->byte_at(index)) & 0xff; 471 } 472 } 473 } else { 474 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 475 } 476 return result; 477 } 478 479 unsigned int java_lang_String::hash_code(oop java_string) { 480 int length = java_lang_String::length(java_string); 481 // Zero length string will hash to zero with String.hashCode() function. 482 if (length == 0) return 0; 483 484 typeArrayOop value = java_lang_String::value(java_string); 485 bool is_latin1 = java_lang_String::is_latin1(java_string); 486 487 if (is_latin1) { 488 return java_lang_String::hash_code(value->byte_at_addr(0), length); 489 } else { 490 return java_lang_String::hash_code(value->char_at_addr(0), length); 491 } 492 } 493 494 char* java_lang_String::as_quoted_ascii(oop java_string) { 495 typeArrayOop value = java_lang_String::value(java_string); 496 int length = java_lang_String::length(java_string); 497 bool is_latin1 = java_lang_String::is_latin1(java_string); 498 499 if (length == 0) return NULL; 500 501 char* result; 502 int result_length; 503 if (!is_latin1) { 504 jchar* base = value->char_at_addr(0); 505 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 506 result = NEW_RESOURCE_ARRAY(char, result_length); 507 UNICODE::as_quoted_ascii(base, length, result, result_length); 508 } else { 509 jbyte* base = value->byte_at_addr(0); 510 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 511 result = NEW_RESOURCE_ARRAY(char, result_length); 512 UNICODE::as_quoted_ascii(base, length, result, result_length); 513 } 514 assert(result_length >= length + 1, "must not be shorter"); 515 assert(result_length == (int)strlen(result) + 1, "must match"); 516 return result; 517 } 518 519 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 520 typeArrayOop value = java_lang_String::value(java_string); 521 int length = java_lang_String::length(java_string); 522 bool is_latin1 = java_lang_String::is_latin1(java_string); 523 if (!is_latin1) { 524 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 525 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 526 return sym; 527 } else { 528 ResourceMark rm; 529 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 530 const char* base = UNICODE::as_utf8(position, length); 531 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 532 return sym; 533 } 534 } 535 536 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 537 typeArrayOop value = java_lang_String::value(java_string); 538 int length = java_lang_String::length(java_string); 539 bool is_latin1 = java_lang_String::is_latin1(java_string); 540 if (!is_latin1) { 541 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 542 return SymbolTable::probe_unicode(base, length); 543 } else { 544 ResourceMark rm; 545 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 546 const char* base = UNICODE::as_utf8(position, length); 547 return SymbolTable::probe(base, length); 548 } 549 } 550 551 int java_lang_String::utf8_length(oop java_string) { 552 typeArrayOop value = java_lang_String::value(java_string); 553 int length = java_lang_String::length(java_string); 554 bool is_latin1 = java_lang_String::is_latin1(java_string); 555 if (length == 0) { 556 return 0; 557 } 558 if (!is_latin1) { 559 return UNICODE::utf8_length(value->char_at_addr(0), length); 560 } else { 561 return UNICODE::utf8_length(value->byte_at_addr(0), length); 562 } 563 } 564 565 char* java_lang_String::as_utf8_string(oop java_string) { 566 typeArrayOop value = java_lang_String::value(java_string); 567 int length = java_lang_String::length(java_string); 568 bool is_latin1 = java_lang_String::is_latin1(java_string); 569 if (!is_latin1) { 570 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 571 return UNICODE::as_utf8(position, length); 572 } else { 573 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 574 return UNICODE::as_utf8(position, length); 575 } 576 } 577 578 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 584 return UNICODE::as_utf8(position, length, buf, buflen); 585 } else { 586 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 587 return UNICODE::as_utf8(position, length, buf, buflen); 588 } 589 } 590 591 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string); 594 assert(start + len <= length, "just checking"); 595 bool is_latin1 = java_lang_String::is_latin1(java_string); 596 if (!is_latin1) { 597 jchar* position = value->char_at_addr(start); 598 return UNICODE::as_utf8(position, len); 599 } else { 600 jbyte* position = value->byte_at_addr(start); 601 return UNICODE::as_utf8(position, len); 602 } 603 } 604 605 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 606 typeArrayOop value = java_lang_String::value(java_string); 607 int length = java_lang_String::length(java_string); 608 assert(start + len <= length, "just checking"); 609 bool is_latin1 = java_lang_String::is_latin1(java_string); 610 if (!is_latin1) { 611 jchar* position = value->char_at_addr(start); 612 return UNICODE::as_utf8(position, len, buf, buflen); 613 } else { 614 jbyte* position = value->byte_at_addr(start); 615 return UNICODE::as_utf8(position, len, buf, buflen); 616 } 617 } 618 619 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 620 assert(java_string->klass() == SystemDictionary::String_klass(), 621 "must be java_string"); 622 typeArrayOop value = java_lang_String::value(java_string); 623 int length = java_lang_String::length(java_string); 624 if (length != len) { 625 return false; 626 } 627 bool is_latin1 = java_lang_String::is_latin1(java_string); 628 if (!is_latin1) { 629 for (int i = 0; i < len; i++) { 630 if (value->char_at(i) != chars[i]) { 631 return false; 632 } 633 } 634 } else { 635 for (int i = 0; i < len; i++) { 636 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 637 return false; 638 } 639 } 640 } 641 return true; 642 } 643 644 bool java_lang_String::equals(oop str1, oop str2) { 645 assert(str1->klass() == SystemDictionary::String_klass(), 646 "must be java String"); 647 assert(str2->klass() == SystemDictionary::String_klass(), 648 "must be java String"); 649 typeArrayOop value1 = java_lang_String::value(str1); 650 int length1 = java_lang_String::length(str1); 651 bool is_latin1 = java_lang_String::is_latin1(str1); 652 typeArrayOop value2 = java_lang_String::value(str2); 653 int length2 = java_lang_String::length(str2); 654 bool is_latin2 = java_lang_String::is_latin1(str2); 655 656 if ((length1 != length2) || (is_latin1 != is_latin2)) { 657 // Strings of different size or with different 658 // coders are never equal. 659 return false; 660 } 661 int blength1 = value1->length(); 662 for (int i = 0; i < value1->length(); i++) { 663 if (value1->byte_at(i) != value2->byte_at(i)) { 664 return false; 665 } 666 } 667 return true; 668 } 669 670 void java_lang_String::print(oop java_string, outputStream* st) { 671 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 672 typeArrayOop value = java_lang_String::value(java_string); 673 674 if (value == NULL) { 675 // This can happen if, e.g., printing a String 676 // object before its initializer has been called 677 st->print("NULL"); 678 return; 679 } 680 681 int length = java_lang_String::length(java_string); 682 bool is_latin1 = java_lang_String::is_latin1(java_string); 683 684 st->print("\""); 685 for (int index = 0; index < length; index++) { 686 st->print("%c", (!is_latin1) ? value->char_at(index) : 687 ((jchar) value->byte_at(index)) & 0xff ); 688 } 689 st->print("\""); 690 } 691 692 693 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 694 assert(mirror.not_null() && fd->is_static(), "just checking"); 695 if (fd->has_initial_value()) { 696 BasicType t = fd->field_type(); 697 switch (t) { 698 case T_BYTE: 699 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 700 break; 701 case T_BOOLEAN: 702 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 703 break; 704 case T_CHAR: 705 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 706 break; 707 case T_SHORT: 708 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 709 break; 710 case T_INT: 711 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 712 break; 713 case T_FLOAT: 714 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 715 break; 716 case T_DOUBLE: 717 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 718 break; 719 case T_LONG: 720 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 721 break; 722 case T_OBJECT: 723 { 724 #ifdef ASSERT 725 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 726 assert(fd->signature() == sym, "just checking"); 727 #endif 728 oop string = fd->string_initial_value(CHECK); 729 mirror()->obj_field_put(fd->offset(), string); 730 } 731 break; 732 default: 733 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 734 "Illegal ConstantValue attribute in class file"); 735 } 736 } 737 } 738 739 740 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 741 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 742 743 // If the offset was read from the shared archive, it was fixed up already 744 if (!k->is_shared()) { 745 if (k->is_instance_klass()) { 746 // During bootstrap, java.lang.Class wasn't loaded so static field 747 // offsets were computed without the size added it. Go back and 748 // update all the static field offsets to included the size. 749 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 750 if (fs.access_flags().is_static()) { 751 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 752 fs.set_offset(real_offset); 753 } 754 } 755 } 756 } 757 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 758 } 759 760 void java_lang_Class::initialize_mirror_fields(Klass* k, 761 Handle mirror, 762 Handle protection_domain, 763 TRAPS) { 764 // Allocate a simple java object for a lock. 765 // This needs to be a java object because during class initialization 766 // it can be held across a java call. 767 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 768 set_init_lock(mirror(), r); 769 770 // Set protection domain also 771 set_protection_domain(mirror(), protection_domain()); 772 773 // Initialize static fields 774 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 775 } 776 777 // Set the java.lang.Module module field in the java_lang_Class mirror 778 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 779 if (module.is_null()) { 780 // During startup, the module may be NULL only if java.base has not been defined yet. 781 // Put the class on the fixup_module_list to patch later when the java.lang.Module 782 // for java.base is known. 783 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 784 785 bool javabase_was_defined = false; 786 { 787 MutexLocker m1(Module_lock, THREAD); 788 // Keep list of classes needing java.base module fixup 789 if (!ModuleEntryTable::javabase_defined()) { 790 if (fixup_module_field_list() == NULL) { 791 GrowableArray<Klass*>* list = 792 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 793 set_fixup_module_field_list(list); 794 } 795 k->class_loader_data()->inc_keep_alive(); 796 fixup_module_field_list()->push(k); 797 } else { 798 javabase_was_defined = true; 799 } 800 } 801 802 // If java.base was already defined then patch this particular class with java.base. 803 if (javabase_was_defined) { 804 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 805 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 806 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 807 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module())); 808 set_module(mirror(), javabase_handle()); 809 } 810 } else { 811 assert(Universe::is_module_initialized() || 812 (ModuleEntryTable::javabase_defined() && 813 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))), 814 "Incorrect java.lang.Module specification while creating mirror"); 815 set_module(mirror(), module()); 816 } 817 } 818 819 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 820 Handle module, Handle protection_domain, TRAPS) { 821 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 822 assert(k->java_mirror() == NULL, "should only assign mirror once"); 823 // Use this moment of initialization to cache modifier_flags also, 824 // to support Class.getModifiers(). Instance classes recalculate 825 // the cached flags after the class file is parsed, but before the 826 // class is put into the system dictionary. 827 int computed_modifiers = k->compute_modifier_flags(CHECK); 828 k->set_modifier_flags(computed_modifiers); 829 // Class_klass has to be loaded because it is used to allocate 830 // the mirror. 831 if (SystemDictionary::Class_klass_loaded()) { 832 // Allocate mirror (java.lang.Class instance) 833 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 834 Handle mirror(THREAD, mirror_oop); 835 Handle comp_mirror; 836 837 // Setup indirection from mirror->klass 838 java_lang_Class::set_klass(mirror(), k); 839 840 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 841 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 842 843 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 844 845 // It might also have a component mirror. This mirror must already exist. 846 if (k->is_array_klass()) { 847 if (k->is_typeArray_klass()) { 848 BasicType type = TypeArrayKlass::cast(k)->element_type(); 849 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 850 } else { 851 assert(k->is_objArray_klass(), "Must be"); 852 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 853 assert(element_klass != NULL, "Must have an element klass"); 854 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 855 } 856 assert(comp_mirror() != NULL, "must have a mirror"); 857 858 // Two-way link between the array klass and its component mirror: 859 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 860 set_component_mirror(mirror(), comp_mirror()); 861 // See below for ordering dependencies between field array_klass in component mirror 862 // and java_mirror in this klass. 863 } else { 864 assert(k->is_instance_klass(), "Must be"); 865 866 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 867 if (HAS_PENDING_EXCEPTION) { 868 // If any of the fields throws an exception like OOM remove the klass field 869 // from the mirror so GC doesn't follow it after the klass has been deallocated. 870 // This mirror looks like a primitive type, which logically it is because it 871 // it represents no class. 872 java_lang_Class::set_klass(mirror(), NULL); 873 return; 874 } 875 } 876 877 // set the classLoader field in the java_lang_Class instance 878 assert(class_loader() == k->class_loader(), "should be same"); 879 set_class_loader(mirror(), class_loader()); 880 881 // set the module field in the java_lang_Class instance 882 set_mirror_module_field(k, mirror, module, THREAD); 883 884 // Setup indirection from klass->mirror 885 // after any exceptions can happen during allocations. 886 k->set_java_mirror(mirror()); 887 if (comp_mirror() != NULL) { 888 // Set after k->java_mirror() is published, because compiled code running 889 // concurrently doesn't expect a k to have a null java_mirror. 890 release_set_array_klass(comp_mirror(), k); 891 } 892 } else { 893 if (fixup_mirror_list() == NULL) { 894 GrowableArray<Klass*>* list = 895 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 896 set_fixup_mirror_list(list); 897 } 898 fixup_mirror_list()->push(k); 899 } 900 } 901 902 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 903 assert(_module_offset != 0, "must have been computed already"); 904 java_lang_Class::set_module(k->java_mirror(), module()); 905 } 906 907 int java_lang_Class::oop_size(oop java_class) { 908 assert(_oop_size_offset != 0, "must be set"); 909 int size = java_class->int_field(_oop_size_offset); 910 assert(size > 0, "Oop size must be greater than zero, not %d", size); 911 return size; 912 } 913 914 void java_lang_Class::set_oop_size(oop java_class, int size) { 915 assert(_oop_size_offset != 0, "must be set"); 916 assert(size > 0, "Oop size must be greater than zero, not %d", size); 917 java_class->int_field_put(_oop_size_offset, size); 918 } 919 920 int java_lang_Class::static_oop_field_count(oop java_class) { 921 assert(_static_oop_field_count_offset != 0, "must be set"); 922 return java_class->int_field(_static_oop_field_count_offset); 923 } 924 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 925 assert(_static_oop_field_count_offset != 0, "must be set"); 926 java_class->int_field_put(_static_oop_field_count_offset, size); 927 } 928 929 oop java_lang_Class::protection_domain(oop java_class) { 930 assert(_protection_domain_offset != 0, "must be set"); 931 return java_class->obj_field(_protection_domain_offset); 932 } 933 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 934 assert(_protection_domain_offset != 0, "must be set"); 935 java_class->obj_field_put(_protection_domain_offset, pd); 936 } 937 938 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 939 assert(_component_mirror_offset != 0, "must be set"); 940 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 941 } 942 oop java_lang_Class::component_mirror(oop java_class) { 943 assert(_component_mirror_offset != 0, "must be set"); 944 return java_class->obj_field(_component_mirror_offset); 945 } 946 947 oop java_lang_Class::init_lock(oop java_class) { 948 assert(_init_lock_offset != 0, "must be set"); 949 return java_class->obj_field(_init_lock_offset); 950 } 951 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 952 assert(_init_lock_offset != 0, "must be set"); 953 java_class->obj_field_put(_init_lock_offset, init_lock); 954 } 955 956 objArrayOop java_lang_Class::signers(oop java_class) { 957 assert(_signers_offset != 0, "must be set"); 958 return (objArrayOop)java_class->obj_field(_signers_offset); 959 } 960 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 961 assert(_signers_offset != 0, "must be set"); 962 java_class->obj_field_put(_signers_offset, (oop)signers); 963 } 964 965 966 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 967 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 968 if (_class_loader_offset != 0) { 969 java_class->obj_field_put(_class_loader_offset, loader); 970 } 971 } 972 973 oop java_lang_Class::class_loader(oop java_class) { 974 assert(_class_loader_offset != 0, "must be set"); 975 return java_class->obj_field(_class_loader_offset); 976 } 977 978 oop java_lang_Class::module(oop java_class) { 979 assert(_module_offset != 0, "must be set"); 980 return java_class->obj_field(_module_offset); 981 } 982 983 void java_lang_Class::set_module(oop java_class, oop module) { 984 assert(_module_offset != 0, "must be set"); 985 java_class->obj_field_put(_module_offset, module); 986 } 987 988 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 989 // This should be improved by adding a field at the Java level or by 990 // introducing a new VM klass (see comment in ClassFileParser) 991 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 992 if (type != T_VOID) { 993 Klass* aklass = Universe::typeArrayKlassObj(type); 994 assert(aklass != NULL, "correct bootstrap"); 995 release_set_array_klass(java_class, aklass); 996 } 997 #ifdef ASSERT 998 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 999 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1000 #endif 1001 return java_class; 1002 } 1003 1004 1005 Klass* java_lang_Class::as_Klass(oop java_class) { 1006 //%note memory_2 1007 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1008 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1009 assert(k == NULL || k->is_klass(), "type check"); 1010 return k; 1011 } 1012 1013 1014 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1015 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1016 java_class->metadata_field_put(_klass_offset, klass); 1017 } 1018 1019 1020 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1021 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1022 Symbol* name = NULL; 1023 bool is_instance = false; 1024 if (is_primitive(java_class)) { 1025 name = vmSymbols::type_signature(primitive_type(java_class)); 1026 } else { 1027 Klass* k = as_Klass(java_class); 1028 is_instance = k->is_instance_klass(); 1029 name = k->name(); 1030 } 1031 if (name == NULL) { 1032 st->print("<null>"); 1033 return; 1034 } 1035 if (is_instance) st->print("L"); 1036 st->write((char*) name->base(), (int) name->utf8_length()); 1037 if (is_instance) st->print(";"); 1038 } 1039 1040 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1041 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1042 Symbol* name; 1043 if (is_primitive(java_class)) { 1044 name = vmSymbols::type_signature(primitive_type(java_class)); 1045 // Because this can create a new symbol, the caller has to decrement 1046 // the refcount, so make adjustment here and below for symbols returned 1047 // that are not created or incremented due to a successful lookup. 1048 name->increment_refcount(); 1049 } else { 1050 Klass* k = as_Klass(java_class); 1051 if (!k->is_instance_klass()) { 1052 name = k->name(); 1053 name->increment_refcount(); 1054 } else { 1055 ResourceMark rm; 1056 const char* sigstr = k->signature_name(); 1057 int siglen = (int) strlen(sigstr); 1058 if (!intern_if_not_found) { 1059 name = SymbolTable::probe(sigstr, siglen); 1060 } else { 1061 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1062 } 1063 } 1064 } 1065 return name; 1066 } 1067 1068 // Returns the Java name for this Java mirror (Resource allocated) 1069 // See Klass::external_name(). 1070 // For primitive type Java mirrors, its type name is returned. 1071 const char* java_lang_Class::as_external_name(oop java_class) { 1072 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1073 const char* name = NULL; 1074 if (is_primitive(java_class)) { 1075 name = type2name(primitive_type(java_class)); 1076 } else { 1077 name = as_Klass(java_class)->external_name(); 1078 } 1079 if (name == NULL) { 1080 name = "<null>"; 1081 } 1082 return name; 1083 } 1084 1085 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1086 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1087 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1088 return k; 1089 } 1090 1091 1092 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1093 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1094 java_class->release_metadata_field_put(_array_klass_offset, klass); 1095 } 1096 1097 1098 bool java_lang_Class::is_primitive(oop java_class) { 1099 // should assert: 1100 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1101 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1102 1103 #ifdef ASSERT 1104 if (is_primitive) { 1105 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1106 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1107 "Should be either the T_VOID primitive or a java primitive"); 1108 } 1109 #endif 1110 1111 return is_primitive; 1112 } 1113 1114 1115 BasicType java_lang_Class::primitive_type(oop java_class) { 1116 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1117 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1118 BasicType type = T_VOID; 1119 if (ak != NULL) { 1120 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1121 type = ArrayKlass::cast(ak)->element_type(); 1122 } else { 1123 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1124 } 1125 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1126 return type; 1127 } 1128 1129 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1130 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1131 if (is_primitive(java_class)) { 1132 if (reference_klass != NULL) 1133 (*reference_klass) = NULL; 1134 return primitive_type(java_class); 1135 } else { 1136 if (reference_klass != NULL) 1137 (*reference_klass) = as_Klass(java_class); 1138 return T_OBJECT; 1139 } 1140 } 1141 1142 1143 oop java_lang_Class::primitive_mirror(BasicType t) { 1144 oop mirror = Universe::java_mirror(t); 1145 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1146 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1147 return mirror; 1148 } 1149 1150 bool java_lang_Class::offsets_computed = false; 1151 int java_lang_Class::classRedefinedCount_offset = -1; 1152 1153 void java_lang_Class::compute_offsets() { 1154 assert(!offsets_computed, "offsets should be initialized only once"); 1155 offsets_computed = true; 1156 1157 Klass* k = SystemDictionary::Class_klass(); 1158 // The classRedefinedCount field is only present starting in 1.5, 1159 // so don't go fatal. 1160 compute_optional_offset(classRedefinedCount_offset, 1161 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1162 1163 // Needs to be optional because the old build runs Queens during bootstrapping 1164 // and jdk8-9 doesn't have coordinated pushes yet. 1165 compute_optional_offset(_class_loader_offset, 1166 k, vmSymbols::classLoader_name(), 1167 vmSymbols::classloader_signature()); 1168 1169 compute_offset(_component_mirror_offset, 1170 k, vmSymbols::componentType_name(), 1171 vmSymbols::class_signature()); 1172 1173 compute_offset(_module_offset, 1174 k, vmSymbols::module_name(), 1175 vmSymbols::module_signature()); 1176 1177 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1178 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1179 // GC treats them the same. 1180 _init_lock_offset = _component_mirror_offset; 1181 1182 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1183 } 1184 1185 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1186 if (classRedefinedCount_offset == -1) { 1187 // If we don't have an offset for it then just return -1 as a marker. 1188 return -1; 1189 } 1190 1191 return the_class_mirror->int_field(classRedefinedCount_offset); 1192 } 1193 1194 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1195 if (classRedefinedCount_offset == -1) { 1196 // If we don't have an offset for it then nothing to set. 1197 return; 1198 } 1199 1200 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1201 } 1202 1203 1204 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1205 // platform thread structure, and a eetop offset which was used for thread 1206 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1207 // merged, so in the HotSpot VM we just use the eetop field for the thread 1208 // instead of the privateInfo_offset. 1209 // 1210 // Note: The stackSize field is only present starting in 1.4. 1211 1212 int java_lang_Thread::_name_offset = 0; 1213 int java_lang_Thread::_group_offset = 0; 1214 int java_lang_Thread::_contextClassLoader_offset = 0; 1215 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1216 int java_lang_Thread::_priority_offset = 0; 1217 int java_lang_Thread::_eetop_offset = 0; 1218 int java_lang_Thread::_daemon_offset = 0; 1219 int java_lang_Thread::_stillborn_offset = 0; 1220 int java_lang_Thread::_stackSize_offset = 0; 1221 int java_lang_Thread::_tid_offset = 0; 1222 int java_lang_Thread::_thread_status_offset = 0; 1223 int java_lang_Thread::_park_blocker_offset = 0; 1224 int java_lang_Thread::_park_event_offset = 0 ; 1225 1226 1227 void java_lang_Thread::compute_offsets() { 1228 assert(_group_offset == 0, "offsets should be initialized only once"); 1229 1230 Klass* k = SystemDictionary::Thread_klass(); 1231 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1232 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1233 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1234 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1235 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1236 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1237 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1238 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1239 // The stackSize field is only present starting in 1.4, so don't go fatal. 1240 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1241 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1242 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1243 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1244 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1245 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1246 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1247 vmSymbols::long_signature()); 1248 } 1249 1250 1251 JavaThread* java_lang_Thread::thread(oop java_thread) { 1252 return (JavaThread*)java_thread->address_field(_eetop_offset); 1253 } 1254 1255 1256 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1257 java_thread->address_field_put(_eetop_offset, (address)thread); 1258 } 1259 1260 1261 oop java_lang_Thread::name(oop java_thread) { 1262 return java_thread->obj_field(_name_offset); 1263 } 1264 1265 1266 void java_lang_Thread::set_name(oop java_thread, oop name) { 1267 java_thread->obj_field_put(_name_offset, name); 1268 } 1269 1270 1271 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1272 return (ThreadPriority)java_thread->int_field(_priority_offset); 1273 } 1274 1275 1276 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1277 java_thread->int_field_put(_priority_offset, priority); 1278 } 1279 1280 1281 oop java_lang_Thread::threadGroup(oop java_thread) { 1282 return java_thread->obj_field(_group_offset); 1283 } 1284 1285 1286 bool java_lang_Thread::is_stillborn(oop java_thread) { 1287 return java_thread->bool_field(_stillborn_offset) != 0; 1288 } 1289 1290 1291 // We never have reason to turn the stillborn bit off 1292 void java_lang_Thread::set_stillborn(oop java_thread) { 1293 java_thread->bool_field_put(_stillborn_offset, true); 1294 } 1295 1296 1297 bool java_lang_Thread::is_alive(oop java_thread) { 1298 JavaThread* thr = java_lang_Thread::thread(java_thread); 1299 return (thr != NULL); 1300 } 1301 1302 1303 bool java_lang_Thread::is_daemon(oop java_thread) { 1304 return java_thread->bool_field(_daemon_offset) != 0; 1305 } 1306 1307 1308 void java_lang_Thread::set_daemon(oop java_thread) { 1309 java_thread->bool_field_put(_daemon_offset, true); 1310 } 1311 1312 oop java_lang_Thread::context_class_loader(oop java_thread) { 1313 return java_thread->obj_field(_contextClassLoader_offset); 1314 } 1315 1316 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1317 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1318 } 1319 1320 1321 jlong java_lang_Thread::stackSize(oop java_thread) { 1322 if (_stackSize_offset > 0) { 1323 return java_thread->long_field(_stackSize_offset); 1324 } else { 1325 return 0; 1326 } 1327 } 1328 1329 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1330 void java_lang_Thread::set_thread_status(oop java_thread, 1331 java_lang_Thread::ThreadStatus status) { 1332 // The threadStatus is only present starting in 1.5 1333 if (_thread_status_offset > 0) { 1334 java_thread->int_field_put(_thread_status_offset, status); 1335 } 1336 } 1337 1338 // Read thread status value from threadStatus field in java.lang.Thread java class. 1339 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1340 // Make sure the caller is operating on behalf of the VM or is 1341 // running VM code (state == _thread_in_vm). 1342 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1343 JavaThread::current()->thread_state() == _thread_in_vm, 1344 "Java Thread is not running in vm"); 1345 // The threadStatus is only present starting in 1.5 1346 if (_thread_status_offset > 0) { 1347 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1348 } else { 1349 // All we can easily figure out is if it is alive, but that is 1350 // enough info for a valid unknown status. 1351 // These aren't restricted to valid set ThreadStatus values, so 1352 // use JVMTI values and cast. 1353 JavaThread* thr = java_lang_Thread::thread(java_thread); 1354 if (thr == NULL) { 1355 // the thread hasn't run yet or is in the process of exiting 1356 return NEW; 1357 } 1358 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1359 } 1360 } 1361 1362 1363 jlong java_lang_Thread::thread_id(oop java_thread) { 1364 // The thread ID field is only present starting in 1.5 1365 if (_tid_offset > 0) { 1366 return java_thread->long_field(_tid_offset); 1367 } else { 1368 return 0; 1369 } 1370 } 1371 1372 oop java_lang_Thread::park_blocker(oop java_thread) { 1373 assert(JDK_Version::current().supports_thread_park_blocker() && 1374 _park_blocker_offset != 0, "Must support parkBlocker field"); 1375 1376 if (_park_blocker_offset > 0) { 1377 return java_thread->obj_field(_park_blocker_offset); 1378 } 1379 1380 return NULL; 1381 } 1382 1383 jlong java_lang_Thread::park_event(oop java_thread) { 1384 if (_park_event_offset > 0) { 1385 return java_thread->long_field(_park_event_offset); 1386 } 1387 return 0; 1388 } 1389 1390 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1391 if (_park_event_offset > 0) { 1392 java_thread->long_field_put(_park_event_offset, ptr); 1393 return true; 1394 } 1395 return false; 1396 } 1397 1398 1399 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1400 assert(_thread_status_offset != 0, "Must have thread status"); 1401 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1402 switch (status) { 1403 case NEW : return "NEW"; 1404 case RUNNABLE : return "RUNNABLE"; 1405 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1406 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1407 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1408 case PARKED : return "WAITING (parking)"; 1409 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1410 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1411 case TERMINATED : return "TERMINATED"; 1412 default : return "UNKNOWN"; 1413 }; 1414 } 1415 int java_lang_ThreadGroup::_parent_offset = 0; 1416 int java_lang_ThreadGroup::_name_offset = 0; 1417 int java_lang_ThreadGroup::_threads_offset = 0; 1418 int java_lang_ThreadGroup::_groups_offset = 0; 1419 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1420 int java_lang_ThreadGroup::_destroyed_offset = 0; 1421 int java_lang_ThreadGroup::_daemon_offset = 0; 1422 int java_lang_ThreadGroup::_nthreads_offset = 0; 1423 int java_lang_ThreadGroup::_ngroups_offset = 0; 1424 1425 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1426 assert(java_thread_group->is_oop(), "thread group must be oop"); 1427 return java_thread_group->obj_field(_parent_offset); 1428 } 1429 1430 // ("name as oop" accessor is not necessary) 1431 1432 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1433 oop name = java_thread_group->obj_field(_name_offset); 1434 // ThreadGroup.name can be null 1435 if (name != NULL) { 1436 return java_lang_String::as_utf8_string(name); 1437 } 1438 return NULL; 1439 } 1440 1441 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1442 assert(java_thread_group->is_oop(), "thread group must be oop"); 1443 return java_thread_group->int_field(_nthreads_offset); 1444 } 1445 1446 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1447 oop threads = java_thread_group->obj_field(_threads_offset); 1448 assert(threads != NULL, "threadgroups should have threads"); 1449 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1450 return objArrayOop(threads); 1451 } 1452 1453 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1454 assert(java_thread_group->is_oop(), "thread group must be oop"); 1455 return java_thread_group->int_field(_ngroups_offset); 1456 } 1457 1458 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1459 oop groups = java_thread_group->obj_field(_groups_offset); 1460 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1461 return objArrayOop(groups); 1462 } 1463 1464 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1465 assert(java_thread_group->is_oop(), "thread group must be oop"); 1466 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1467 } 1468 1469 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1470 assert(java_thread_group->is_oop(), "thread group must be oop"); 1471 return java_thread_group->bool_field(_destroyed_offset) != 0; 1472 } 1473 1474 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1475 assert(java_thread_group->is_oop(), "thread group must be oop"); 1476 return java_thread_group->bool_field(_daemon_offset) != 0; 1477 } 1478 1479 void java_lang_ThreadGroup::compute_offsets() { 1480 assert(_parent_offset == 0, "offsets should be initialized only once"); 1481 1482 Klass* k = SystemDictionary::ThreadGroup_klass(); 1483 1484 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1485 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1486 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1487 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1488 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1489 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1490 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1491 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1492 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1493 } 1494 1495 1496 void java_lang_Throwable::compute_offsets() { 1497 Klass* k = SystemDictionary::Throwable_klass(); 1498 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1499 } 1500 1501 oop java_lang_Throwable::unassigned_stacktrace() { 1502 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1503 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1504 if (UseCompressedOops) { 1505 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1506 } else { 1507 return oopDesc::load_decode_heap_oop((oop*)addr); 1508 } 1509 } 1510 1511 oop java_lang_Throwable::backtrace(oop throwable) { 1512 return throwable->obj_field_acquire(backtrace_offset); 1513 } 1514 1515 1516 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1517 throwable->release_obj_field_put(backtrace_offset, value); 1518 } 1519 1520 int java_lang_Throwable::depth(oop throwable) { 1521 return throwable->int_field(depth_offset); 1522 } 1523 1524 void java_lang_Throwable::set_depth(oop throwable, int value) { 1525 throwable->int_field_put(depth_offset, value); 1526 } 1527 1528 oop java_lang_Throwable::message(oop throwable) { 1529 return throwable->obj_field(detailMessage_offset); 1530 } 1531 1532 1533 // Return Symbol for detailed_message or NULL 1534 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1535 PRESERVE_EXCEPTION_MARK; // Keep original exception 1536 oop detailed_message = java_lang_Throwable::message(throwable); 1537 if (detailed_message != NULL) { 1538 return java_lang_String::as_symbol(detailed_message, THREAD); 1539 } 1540 return NULL; 1541 } 1542 1543 void java_lang_Throwable::set_message(oop throwable, oop value) { 1544 throwable->obj_field_put(detailMessage_offset, value); 1545 } 1546 1547 1548 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1549 throwable->obj_field_put(stackTrace_offset, st_element_array); 1550 } 1551 1552 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1553 set_stacktrace(throwable, NULL); 1554 } 1555 1556 1557 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1558 ResourceMark rm; 1559 Klass* k = throwable->klass(); 1560 assert(k != NULL, "just checking"); 1561 st->print("%s", k->external_name()); 1562 oop msg = message(throwable); 1563 if (msg != NULL) { 1564 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1565 } 1566 } 1567 1568 // After this many redefines, the stack trace is unreliable. 1569 const int MAX_VERSION = USHRT_MAX; 1570 1571 static inline bool version_matches(Method* method, int version) { 1572 assert(version < MAX_VERSION, "version is too big"); 1573 return method != NULL && (method->constants()->version() == version); 1574 } 1575 1576 1577 // This class provides a simple wrapper over the internal structure of 1578 // exception backtrace to insulate users of the backtrace from needing 1579 // to know what it looks like. 1580 class BacktraceBuilder: public StackObj { 1581 friend class BacktraceIterator; 1582 private: 1583 Handle _backtrace; 1584 objArrayOop _head; 1585 typeArrayOop _methods; 1586 typeArrayOop _bcis; 1587 objArrayOop _mirrors; 1588 typeArrayOop _names; // needed to insulate method name against redefinition 1589 int _index; 1590 NoSafepointVerifier _nsv; 1591 1592 enum { 1593 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1594 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1595 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1596 trace_names_offset = java_lang_Throwable::trace_names_offset, 1597 trace_next_offset = java_lang_Throwable::trace_next_offset, 1598 trace_size = java_lang_Throwable::trace_size, 1599 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1600 }; 1601 1602 // get info out of chunks 1603 static typeArrayOop get_methods(objArrayHandle chunk) { 1604 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1605 assert(methods != NULL, "method array should be initialized in backtrace"); 1606 return methods; 1607 } 1608 static typeArrayOop get_bcis(objArrayHandle chunk) { 1609 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1610 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1611 return bcis; 1612 } 1613 static objArrayOop get_mirrors(objArrayHandle chunk) { 1614 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1615 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1616 return mirrors; 1617 } 1618 static typeArrayOop get_names(objArrayHandle chunk) { 1619 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1620 assert(names != NULL, "names array should be initialized in backtrace"); 1621 return names; 1622 } 1623 1624 public: 1625 1626 // constructor for new backtrace 1627 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1628 expand(CHECK); 1629 _backtrace = Handle(THREAD, _head); 1630 _index = 0; 1631 } 1632 1633 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1634 _methods = get_methods(backtrace); 1635 _bcis = get_bcis(backtrace); 1636 _mirrors = get_mirrors(backtrace); 1637 _names = get_names(backtrace); 1638 assert(_methods->length() == _bcis->length() && 1639 _methods->length() == _mirrors->length() && 1640 _mirrors->length() == _names->length(), 1641 "method and source information arrays should match"); 1642 1643 // head is the preallocated backtrace 1644 _head = backtrace(); 1645 _backtrace = Handle(thread, _head); 1646 _index = 0; 1647 } 1648 1649 void expand(TRAPS) { 1650 objArrayHandle old_head(THREAD, _head); 1651 PauseNoSafepointVerifier pnsv(&_nsv); 1652 1653 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1654 objArrayHandle new_head(THREAD, head); 1655 1656 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1657 typeArrayHandle new_methods(THREAD, methods); 1658 1659 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1660 typeArrayHandle new_bcis(THREAD, bcis); 1661 1662 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1663 objArrayHandle new_mirrors(THREAD, mirrors); 1664 1665 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 1666 typeArrayHandle new_names(THREAD, names); 1667 1668 if (!old_head.is_null()) { 1669 old_head->obj_at_put(trace_next_offset, new_head()); 1670 } 1671 new_head->obj_at_put(trace_methods_offset, new_methods()); 1672 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1673 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1674 new_head->obj_at_put(trace_names_offset, new_names()); 1675 1676 _head = new_head(); 1677 _methods = new_methods(); 1678 _bcis = new_bcis(); 1679 _mirrors = new_mirrors(); 1680 _names = new_names(); 1681 _index = 0; 1682 } 1683 1684 oop backtrace() { 1685 return _backtrace(); 1686 } 1687 1688 inline void push(Method* method, int bci, TRAPS) { 1689 // Smear the -1 bci to 0 since the array only holds unsigned 1690 // shorts. The later line number lookup would just smear the -1 1691 // to a 0 even if it could be recorded. 1692 if (bci == SynchronizationEntryBCI) bci = 0; 1693 1694 if (_index >= trace_chunk_size) { 1695 methodHandle mhandle(THREAD, method); 1696 expand(CHECK); 1697 method = mhandle(); 1698 } 1699 1700 _methods->short_at_put(_index, method->orig_method_idnum()); 1701 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1702 1703 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 1704 // klass owning the symbols alive so their refcounts aren't decremented. 1705 Symbol* name = method->name(); 1706 _names->symbol_at_put(_index, name); 1707 1708 // We need to save the mirrors in the backtrace to keep the class 1709 // from being unloaded while we still have this stack trace. 1710 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1711 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1712 _index++; 1713 } 1714 1715 }; 1716 1717 struct BacktraceElement : public StackObj { 1718 int _method_id; 1719 int _bci; 1720 int _version; 1721 Symbol* _name; 1722 Handle _mirror; 1723 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 1724 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 1725 }; 1726 1727 class BacktraceIterator : public StackObj { 1728 int _index; 1729 objArrayHandle _result; 1730 objArrayHandle _mirrors; 1731 typeArrayHandle _methods; 1732 typeArrayHandle _bcis; 1733 typeArrayHandle _names; 1734 1735 void init(objArrayHandle result, Thread* thread) { 1736 // Get method id, bci, version and mirror from chunk 1737 _result = result; 1738 if (_result.not_null()) { 1739 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1740 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1741 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1742 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 1743 _index = 0; 1744 } 1745 } 1746 public: 1747 BacktraceIterator(objArrayHandle result, Thread* thread) { 1748 init(result, thread); 1749 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1750 } 1751 1752 BacktraceElement next(Thread* thread) { 1753 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1754 _methods->short_at(_index), 1755 Backtrace::version_at(_bcis->int_at(_index)), 1756 Backtrace::bci_at(_bcis->int_at(_index)), 1757 _names->symbol_at(_index)); 1758 _index++; 1759 1760 if (_index >= java_lang_Throwable::trace_chunk_size) { 1761 int next_offset = java_lang_Throwable::trace_next_offset; 1762 // Get next chunk 1763 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1764 init(result, thread); 1765 } 1766 return e; 1767 } 1768 1769 bool repeat() { 1770 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1771 } 1772 }; 1773 1774 1775 // Print stack trace element to resource allocated buffer 1776 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1777 int version, int bci, Symbol* name) { 1778 ResourceMark rm; 1779 1780 // Get strings and string lengths 1781 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1782 const char* klass_name = holder->external_name(); 1783 int buf_len = (int)strlen(klass_name); 1784 1785 char* method_name = name->as_C_string(); 1786 buf_len += (int)strlen(method_name); 1787 1788 char* source_file_name = NULL; 1789 Symbol* source = Backtrace::get_source_file_name(holder, version); 1790 if (source != NULL) { 1791 source_file_name = source->as_C_string(); 1792 buf_len += (int)strlen(source_file_name); 1793 } 1794 1795 char *module_name = NULL, *module_version = NULL; 1796 ModuleEntry* module = holder->module(); 1797 if (module->is_named()) { 1798 module_name = module->name()->as_C_string(); 1799 buf_len += (int)strlen(module_name); 1800 if (module->version() != NULL) { 1801 module_version = module->version()->as_C_string(); 1802 buf_len += (int)strlen(module_version); 1803 } 1804 } 1805 1806 // Allocate temporary buffer with extra space for formatting and line number 1807 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1808 1809 // Print stack trace line in buffer 1810 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1811 1812 // Print module information 1813 if (module_name != NULL) { 1814 if (module_version != NULL) { 1815 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1816 } else { 1817 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1818 } 1819 } 1820 1821 // The method can be NULL if the requested class version is gone 1822 Method* method = holder->method_with_orig_idnum(method_id, version); 1823 if (!version_matches(method, version)) { 1824 strcat(buf, "Redefined)"); 1825 } else { 1826 int line_number = Backtrace::get_line_number(method, bci); 1827 if (line_number == -2) { 1828 strcat(buf, "Native Method)"); 1829 } else { 1830 if (source_file_name != NULL && (line_number != -1)) { 1831 // Sourcename and linenumber 1832 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1833 } else if (source_file_name != NULL) { 1834 // Just sourcename 1835 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1836 } else { 1837 // Neither sourcename nor linenumber 1838 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1839 } 1840 CompiledMethod* nm = method->code(); 1841 if (WizardMode && nm != NULL) { 1842 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1843 } 1844 } 1845 } 1846 1847 st->print_cr("%s", buf); 1848 } 1849 1850 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1851 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 1852 int method_id = method->orig_method_idnum(); 1853 int version = method->constants()->version(); 1854 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 1855 } 1856 1857 /** 1858 * Print the throwable message and its stack trace plus all causes by walking the 1859 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1860 */ 1861 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1862 // First, print the message. 1863 print(throwable(), st); 1864 st->cr(); 1865 1866 // Now print the stack trace. 1867 Thread* THREAD = Thread::current(); 1868 while (throwable.not_null()) { 1869 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1870 if (result.is_null()) { 1871 st->print_raw_cr("\t<<no stack trace available>>"); 1872 return; 1873 } 1874 BacktraceIterator iter(result, THREAD); 1875 1876 while (iter.repeat()) { 1877 BacktraceElement bte = iter.next(THREAD); 1878 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 1879 } 1880 { 1881 // Call getCause() which doesn't necessarily return the _cause field. 1882 EXCEPTION_MARK; 1883 JavaValue cause(T_OBJECT); 1884 JavaCalls::call_virtual(&cause, 1885 throwable, 1886 throwable->klass(), 1887 vmSymbols::getCause_name(), 1888 vmSymbols::void_throwable_signature(), 1889 THREAD); 1890 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1891 if (HAS_PENDING_EXCEPTION) { 1892 CLEAR_PENDING_EXCEPTION; 1893 throwable = Handle(); 1894 } else { 1895 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1896 if (throwable.not_null()) { 1897 st->print("Caused by: "); 1898 print(throwable(), st); 1899 st->cr(); 1900 } 1901 } 1902 } 1903 } 1904 } 1905 1906 /** 1907 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1908 */ 1909 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1910 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1911 JavaValue result(T_VOID); 1912 JavaCalls::call_virtual(&result, 1913 throwable, 1914 SystemDictionary::Throwable_klass(), 1915 vmSymbols::printStackTrace_name(), 1916 vmSymbols::void_method_signature(), 1917 THREAD); 1918 } 1919 1920 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1921 if (!StackTraceInThrowable) return; 1922 ResourceMark rm(THREAD); 1923 1924 // Start out by clearing the backtrace for this object, in case the VM 1925 // runs out of memory while allocating the stack trace 1926 set_backtrace(throwable(), NULL); 1927 // Clear lazily constructed Java level stacktrace if refilling occurs 1928 // This is unnecessary in 1.7+ but harmless 1929 clear_stacktrace(throwable()); 1930 1931 int max_depth = MaxJavaStackTraceDepth; 1932 JavaThread* thread = (JavaThread*)THREAD; 1933 1934 BacktraceBuilder bt(CHECK); 1935 1936 // If there is no Java frame just return the method that was being called 1937 // with bci 0 1938 if (!thread->has_last_Java_frame()) { 1939 if (max_depth >= 1 && method() != NULL) { 1940 bt.push(method(), 0, CHECK); 1941 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1942 set_depth(throwable(), 1); 1943 set_backtrace(throwable(), bt.backtrace()); 1944 } 1945 return; 1946 } 1947 1948 // Instead of using vframe directly, this version of fill_in_stack_trace 1949 // basically handles everything by hand. This significantly improved the 1950 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1951 // See bug 6333838 for more details. 1952 // The "ASSERT" here is to verify this method generates the exactly same stack 1953 // trace as utilizing vframe. 1954 #ifdef ASSERT 1955 vframeStream st(thread); 1956 methodHandle st_method(THREAD, st.method()); 1957 #endif 1958 int total_count = 0; 1959 RegisterMap map(thread, false); 1960 int decode_offset = 0; 1961 CompiledMethod* nm = NULL; 1962 bool skip_fillInStackTrace_check = false; 1963 bool skip_throwableInit_check = false; 1964 bool skip_hidden = !ShowHiddenFrames; 1965 1966 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1967 Method* method = NULL; 1968 int bci = 0; 1969 1970 // Compiled java method case. 1971 if (decode_offset != 0) { 1972 DebugInfoReadStream stream(nm, decode_offset); 1973 decode_offset = stream.read_int(); 1974 method = (Method*)nm->metadata_at(stream.read_int()); 1975 bci = stream.read_bci(); 1976 } else { 1977 if (fr.is_first_frame()) break; 1978 address pc = fr.pc(); 1979 if (fr.is_interpreted_frame()) { 1980 address bcp = fr.interpreter_frame_bcp(); 1981 method = fr.interpreter_frame_method(); 1982 bci = method->bci_from(bcp); 1983 fr = fr.sender(&map); 1984 } else { 1985 CodeBlob* cb = fr.cb(); 1986 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1987 // but non nmethod 1988 fr = fr.sender(&map); 1989 if (cb == NULL || !cb->is_compiled()) { 1990 continue; 1991 } 1992 nm = cb->as_compiled_method(); 1993 if (nm->method()->is_native()) { 1994 method = nm->method(); 1995 bci = 0; 1996 } else { 1997 PcDesc* pd = nm->pc_desc_at(pc); 1998 decode_offset = pd->scope_decode_offset(); 1999 // if decode_offset is not equal to 0, it will execute the 2000 // "compiled java method case" at the beginning of the loop. 2001 continue; 2002 } 2003 } 2004 } 2005 #ifdef ASSERT 2006 assert(st_method() == method && st.bci() == bci, 2007 "Wrong stack trace"); 2008 st.next(); 2009 // vframeStream::method isn't GC-safe so store off a copy 2010 // of the Method* in case we GC. 2011 if (!st.at_end()) { 2012 st_method = st.method(); 2013 } 2014 #endif 2015 2016 // the format of the stacktrace will be: 2017 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2018 // - 0 or more <init> methods for the exception class (skipped) 2019 // - rest of the stack 2020 2021 if (!skip_fillInStackTrace_check) { 2022 if (method->name() == vmSymbols::fillInStackTrace_name() && 2023 throwable->is_a(method->method_holder())) { 2024 continue; 2025 } 2026 else { 2027 skip_fillInStackTrace_check = true; // gone past them all 2028 } 2029 } 2030 if (!skip_throwableInit_check) { 2031 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2032 2033 // skip <init> methods of the exception class and superclasses 2034 // This is simlar to classic VM. 2035 if (method->name() == vmSymbols::object_initializer_name() && 2036 throwable->is_a(method->method_holder())) { 2037 continue; 2038 } else { 2039 // there are none or we've seen them all - either way stop checking 2040 skip_throwableInit_check = true; 2041 } 2042 } 2043 if (method->is_hidden()) { 2044 if (skip_hidden) continue; 2045 } 2046 bt.push(method, bci, CHECK); 2047 total_count++; 2048 } 2049 2050 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2051 2052 // Put completed stack trace into throwable object 2053 set_backtrace(throwable(), bt.backtrace()); 2054 set_depth(throwable(), total_count); 2055 } 2056 2057 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2058 // No-op if stack trace is disabled 2059 if (!StackTraceInThrowable) { 2060 return; 2061 } 2062 2063 // Disable stack traces for some preallocated out of memory errors 2064 if (!Universe::should_fill_in_stack_trace(throwable)) { 2065 return; 2066 } 2067 2068 PRESERVE_EXCEPTION_MARK; 2069 2070 JavaThread* thread = JavaThread::active(); 2071 fill_in_stack_trace(throwable, method, thread); 2072 // ignore exceptions thrown during stack trace filling 2073 CLEAR_PENDING_EXCEPTION; 2074 } 2075 2076 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2077 // Allocate stack trace - backtrace is created but not filled in 2078 2079 // No-op if stack trace is disabled 2080 if (!StackTraceInThrowable) return; 2081 BacktraceBuilder bt(CHECK); // creates a backtrace 2082 set_backtrace(throwable(), bt.backtrace()); 2083 } 2084 2085 2086 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2087 // Fill in stack trace into preallocated backtrace (no GC) 2088 2089 // No-op if stack trace is disabled 2090 if (!StackTraceInThrowable) return; 2091 2092 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2093 2094 JavaThread* THREAD = JavaThread::current(); 2095 2096 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2097 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2098 2099 ResourceMark rm(THREAD); 2100 vframeStream st(THREAD); 2101 2102 BacktraceBuilder bt(THREAD, backtrace); 2103 2104 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2105 // methods as preallocated errors aren't created by "java" code. 2106 2107 // fill in as much stack trace as possible 2108 int chunk_count = 0; 2109 for (;!st.at_end(); st.next()) { 2110 bt.push(st.method(), st.bci(), CHECK); 2111 chunk_count++; 2112 2113 // Bail-out for deep stacks 2114 if (chunk_count >= trace_chunk_size) break; 2115 } 2116 set_depth(throwable(), chunk_count); 2117 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2118 2119 // We support the Throwable immutability protocol defined for Java 7. 2120 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2121 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2122 } 2123 2124 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2125 objArrayHandle stack_trace_array_h, TRAPS) { 2126 2127 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2128 THROW(vmSymbols::java_lang_NullPointerException()); 2129 } 2130 2131 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2132 2133 if (stack_trace_array_h->length() != depth(throwable())) { 2134 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2135 } 2136 2137 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2138 BacktraceIterator iter(result, THREAD); 2139 2140 int index = 0; 2141 while (iter.repeat()) { 2142 BacktraceElement bte = iter.next(THREAD); 2143 2144 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2145 2146 if (stack_trace_element.is_null()) { 2147 THROW(vmSymbols::java_lang_NullPointerException()); 2148 } 2149 2150 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2151 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2152 2153 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2154 method, 2155 bte._version, 2156 bte._bci, 2157 bte._name, CHECK); 2158 } 2159 } 2160 2161 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2162 // Allocate java.lang.StackTraceElement instance 2163 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2164 assert(k != NULL, "must be loaded in 1.4+"); 2165 if (k->should_be_initialized()) { 2166 k->initialize(CHECK_0); 2167 } 2168 2169 Handle element = k->allocate_instance_handle(CHECK_0); 2170 2171 int version = method->constants()->version(); 2172 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2173 return element(); 2174 } 2175 2176 void java_lang_StackTraceElement::fill_in(Handle element, 2177 InstanceKlass* holder, const methodHandle& method, 2178 int version, int bci, Symbol* name, TRAPS) { 2179 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2180 2181 // Fill in class name 2182 ResourceMark rm(THREAD); 2183 const char* str = holder->external_name(); 2184 oop classname = StringTable::intern((char*) str, CHECK); 2185 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2186 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2187 2188 oop loader = holder->class_loader(); 2189 if (loader != NULL) { 2190 oop loader_name = java_lang_ClassLoader::name(loader); 2191 if (loader_name != NULL) 2192 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2193 } 2194 2195 // Fill in method name 2196 oop methodname = StringTable::intern(name, CHECK); 2197 java_lang_StackTraceElement::set_methodName(element(), methodname); 2198 2199 // Fill in module name and version 2200 ModuleEntry* module = holder->module(); 2201 if (module->is_named()) { 2202 oop module_name = StringTable::intern(module->name(), CHECK); 2203 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2204 oop module_version; 2205 if (module->version() != NULL) { 2206 module_version = StringTable::intern(module->version(), CHECK); 2207 } else { 2208 module_version = NULL; 2209 } 2210 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2211 } 2212 2213 if (method() == NULL || !version_matches(method(), version)) { 2214 // The method was redefined, accurate line number information isn't available 2215 java_lang_StackTraceElement::set_fileName(element(), NULL); 2216 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2217 } else { 2218 // Fill in source file name and line number. 2219 Symbol* source = Backtrace::get_source_file_name(holder, version); 2220 if (ShowHiddenFrames && source == NULL) 2221 source = vmSymbols::unknown_class_name(); 2222 oop filename = StringTable::intern(source, CHECK); 2223 java_lang_StackTraceElement::set_fileName(element(), filename); 2224 2225 int line_number = Backtrace::get_line_number(method, bci); 2226 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2227 } 2228 } 2229 2230 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2231 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2232 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2233 // we should expand MemberName::name when Throwable uses StackTrace 2234 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2235 return method; 2236 } 2237 2238 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2239 // set Method* or mid/cpref 2240 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2241 InstanceKlass* ik = method->method_holder(); 2242 CallInfo info(method(), ik, CHECK); 2243 MethodHandles::init_method_MemberName(mname, info); 2244 // set bci 2245 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2246 // method may be redefined; store the version 2247 int version = method->constants()->version(); 2248 assert((jushort)version == version, "version should be short"); 2249 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2250 } 2251 2252 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2253 ResourceMark rm(THREAD); 2254 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2255 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2256 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2257 2258 short version = stackFrame->short_field(_version_offset); 2259 short bci = stackFrame->short_field(_bci_offset); 2260 Symbol* name = method->name(); 2261 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2262 } 2263 2264 void java_lang_StackFrameInfo::compute_offsets() { 2265 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2266 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2267 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2268 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2269 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2270 } 2271 2272 void java_lang_LiveStackFrameInfo::compute_offsets() { 2273 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2274 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2275 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2276 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2277 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature()); 2278 } 2279 2280 void java_lang_reflect_AccessibleObject::compute_offsets() { 2281 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2282 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2283 } 2284 2285 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2287 return (jboolean) reflect->bool_field(override_offset); 2288 } 2289 2290 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 reflect->bool_field_put(override_offset, (int) value); 2293 } 2294 2295 void java_lang_reflect_Method::compute_offsets() { 2296 Klass* k = SystemDictionary::reflect_Method_klass(); 2297 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2298 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2299 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2300 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2301 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2302 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2303 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2304 // The generic signature and annotations fields are only present in 1.5 2305 signature_offset = -1; 2306 annotations_offset = -1; 2307 parameter_annotations_offset = -1; 2308 annotation_default_offset = -1; 2309 type_annotations_offset = -1; 2310 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2311 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2312 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2313 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2314 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2315 } 2316 2317 Handle java_lang_reflect_Method::create(TRAPS) { 2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2319 Klass* klass = SystemDictionary::reflect_Method_klass(); 2320 // This class is eagerly initialized during VM initialization, since we keep a refence 2321 // to one of the methods 2322 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2323 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2324 } 2325 2326 oop java_lang_reflect_Method::clazz(oop reflect) { 2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2328 return reflect->obj_field(clazz_offset); 2329 } 2330 2331 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2333 reflect->obj_field_put(clazz_offset, value); 2334 } 2335 2336 int java_lang_reflect_Method::slot(oop reflect) { 2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2338 return reflect->int_field(slot_offset); 2339 } 2340 2341 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2343 reflect->int_field_put(slot_offset, value); 2344 } 2345 2346 oop java_lang_reflect_Method::name(oop method) { 2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2348 return method->obj_field(name_offset); 2349 } 2350 2351 void java_lang_reflect_Method::set_name(oop method, oop value) { 2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2353 method->obj_field_put(name_offset, value); 2354 } 2355 2356 oop java_lang_reflect_Method::return_type(oop method) { 2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2358 return method->obj_field(returnType_offset); 2359 } 2360 2361 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2363 method->obj_field_put(returnType_offset, value); 2364 } 2365 2366 oop java_lang_reflect_Method::parameter_types(oop method) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 return method->obj_field(parameterTypes_offset); 2369 } 2370 2371 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2373 method->obj_field_put(parameterTypes_offset, value); 2374 } 2375 2376 oop java_lang_reflect_Method::exception_types(oop method) { 2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2378 return method->obj_field(exceptionTypes_offset); 2379 } 2380 2381 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2382 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2383 method->obj_field_put(exceptionTypes_offset, value); 2384 } 2385 2386 int java_lang_reflect_Method::modifiers(oop method) { 2387 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2388 return method->int_field(modifiers_offset); 2389 } 2390 2391 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2393 method->int_field_put(modifiers_offset, value); 2394 } 2395 2396 bool java_lang_reflect_Method::has_signature_field() { 2397 return (signature_offset >= 0); 2398 } 2399 2400 oop java_lang_reflect_Method::signature(oop method) { 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 return method->obj_field(signature_offset); 2404 } 2405 2406 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2408 assert(has_signature_field(), "signature field must be present"); 2409 method->obj_field_put(signature_offset, value); 2410 } 2411 2412 bool java_lang_reflect_Method::has_annotations_field() { 2413 return (annotations_offset >= 0); 2414 } 2415 2416 oop java_lang_reflect_Method::annotations(oop method) { 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 return method->obj_field(annotations_offset); 2420 } 2421 2422 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2424 assert(has_annotations_field(), "annotations field must be present"); 2425 method->obj_field_put(annotations_offset, value); 2426 } 2427 2428 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2429 return (parameter_annotations_offset >= 0); 2430 } 2431 2432 oop java_lang_reflect_Method::parameter_annotations(oop method) { 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 return method->obj_field(parameter_annotations_offset); 2436 } 2437 2438 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2440 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2441 method->obj_field_put(parameter_annotations_offset, value); 2442 } 2443 2444 bool java_lang_reflect_Method::has_annotation_default_field() { 2445 return (annotation_default_offset >= 0); 2446 } 2447 2448 oop java_lang_reflect_Method::annotation_default(oop method) { 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 return method->obj_field(annotation_default_offset); 2452 } 2453 2454 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2456 assert(has_annotation_default_field(), "annotation default field must be present"); 2457 method->obj_field_put(annotation_default_offset, value); 2458 } 2459 2460 bool java_lang_reflect_Method::has_type_annotations_field() { 2461 return (type_annotations_offset >= 0); 2462 } 2463 2464 oop java_lang_reflect_Method::type_annotations(oop method) { 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 return method->obj_field(type_annotations_offset); 2468 } 2469 2470 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2472 assert(has_type_annotations_field(), "type_annotations field must be present"); 2473 method->obj_field_put(type_annotations_offset, value); 2474 } 2475 2476 void java_lang_reflect_Constructor::compute_offsets() { 2477 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2478 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2479 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2480 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2481 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2482 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2483 // The generic signature and annotations fields are only present in 1.5 2484 signature_offset = -1; 2485 annotations_offset = -1; 2486 parameter_annotations_offset = -1; 2487 type_annotations_offset = -1; 2488 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2489 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2490 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2491 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2492 } 2493 2494 Handle java_lang_reflect_Constructor::create(TRAPS) { 2495 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2496 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2497 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2498 InstanceKlass* ik = InstanceKlass::cast(k); 2499 // Ensure it is initialized 2500 ik->initialize(CHECK_NH); 2501 return ik->allocate_instance_handle(THREAD); 2502 } 2503 2504 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2506 return reflect->obj_field(clazz_offset); 2507 } 2508 2509 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2511 reflect->obj_field_put(clazz_offset, value); 2512 } 2513 2514 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2515 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2516 return constructor->obj_field(parameterTypes_offset); 2517 } 2518 2519 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2520 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2521 constructor->obj_field_put(parameterTypes_offset, value); 2522 } 2523 2524 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2525 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2526 return constructor->obj_field(exceptionTypes_offset); 2527 } 2528 2529 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2530 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2531 constructor->obj_field_put(exceptionTypes_offset, value); 2532 } 2533 2534 int java_lang_reflect_Constructor::slot(oop reflect) { 2535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2536 return reflect->int_field(slot_offset); 2537 } 2538 2539 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2540 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2541 reflect->int_field_put(slot_offset, value); 2542 } 2543 2544 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2546 return constructor->int_field(modifiers_offset); 2547 } 2548 2549 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2551 constructor->int_field_put(modifiers_offset, value); 2552 } 2553 2554 bool java_lang_reflect_Constructor::has_signature_field() { 2555 return (signature_offset >= 0); 2556 } 2557 2558 oop java_lang_reflect_Constructor::signature(oop constructor) { 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 return constructor->obj_field(signature_offset); 2562 } 2563 2564 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2566 assert(has_signature_field(), "signature field must be present"); 2567 constructor->obj_field_put(signature_offset, value); 2568 } 2569 2570 bool java_lang_reflect_Constructor::has_annotations_field() { 2571 return (annotations_offset >= 0); 2572 } 2573 2574 oop java_lang_reflect_Constructor::annotations(oop constructor) { 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 return constructor->obj_field(annotations_offset); 2578 } 2579 2580 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2581 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2582 assert(has_annotations_field(), "annotations field must be present"); 2583 constructor->obj_field_put(annotations_offset, value); 2584 } 2585 2586 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2587 return (parameter_annotations_offset >= 0); 2588 } 2589 2590 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 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 return method->obj_field(parameter_annotations_offset); 2594 } 2595 2596 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2597 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2598 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2599 method->obj_field_put(parameter_annotations_offset, value); 2600 } 2601 2602 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2603 return (type_annotations_offset >= 0); 2604 } 2605 2606 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 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 return constructor->obj_field(type_annotations_offset); 2610 } 2611 2612 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2613 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2614 assert(has_type_annotations_field(), "type_annotations field must be present"); 2615 constructor->obj_field_put(type_annotations_offset, value); 2616 } 2617 2618 void java_lang_reflect_Field::compute_offsets() { 2619 Klass* k = SystemDictionary::reflect_Field_klass(); 2620 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2621 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2622 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2623 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2624 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2625 // The generic signature and annotations fields are only present in 1.5 2626 signature_offset = -1; 2627 annotations_offset = -1; 2628 type_annotations_offset = -1; 2629 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2630 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2631 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2632 } 2633 2634 Handle java_lang_reflect_Field::create(TRAPS) { 2635 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2636 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2637 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2638 InstanceKlass* ik = InstanceKlass::cast(k); 2639 // Ensure it is initialized 2640 ik->initialize(CHECK_NH); 2641 return ik->allocate_instance_handle(THREAD); 2642 } 2643 2644 oop java_lang_reflect_Field::clazz(oop reflect) { 2645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2646 return reflect->obj_field(clazz_offset); 2647 } 2648 2649 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2651 reflect->obj_field_put(clazz_offset, value); 2652 } 2653 2654 oop java_lang_reflect_Field::name(oop field) { 2655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2656 return field->obj_field(name_offset); 2657 } 2658 2659 void java_lang_reflect_Field::set_name(oop field, oop value) { 2660 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2661 field->obj_field_put(name_offset, value); 2662 } 2663 2664 oop java_lang_reflect_Field::type(oop field) { 2665 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2666 return field->obj_field(type_offset); 2667 } 2668 2669 void java_lang_reflect_Field::set_type(oop field, oop value) { 2670 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2671 field->obj_field_put(type_offset, value); 2672 } 2673 2674 int java_lang_reflect_Field::slot(oop reflect) { 2675 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2676 return reflect->int_field(slot_offset); 2677 } 2678 2679 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2681 reflect->int_field_put(slot_offset, value); 2682 } 2683 2684 int java_lang_reflect_Field::modifiers(oop field) { 2685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2686 return field->int_field(modifiers_offset); 2687 } 2688 2689 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2690 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2691 field->int_field_put(modifiers_offset, value); 2692 } 2693 2694 bool java_lang_reflect_Field::has_signature_field() { 2695 return (signature_offset >= 0); 2696 } 2697 2698 oop java_lang_reflect_Field::signature(oop field) { 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 return field->obj_field(signature_offset); 2702 } 2703 2704 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2706 assert(has_signature_field(), "signature field must be present"); 2707 field->obj_field_put(signature_offset, value); 2708 } 2709 2710 bool java_lang_reflect_Field::has_annotations_field() { 2711 return (annotations_offset >= 0); 2712 } 2713 2714 oop java_lang_reflect_Field::annotations(oop field) { 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 return field->obj_field(annotations_offset); 2718 } 2719 2720 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2722 assert(has_annotations_field(), "annotations field must be present"); 2723 field->obj_field_put(annotations_offset, value); 2724 } 2725 2726 bool java_lang_reflect_Field::has_type_annotations_field() { 2727 return (type_annotations_offset >= 0); 2728 } 2729 2730 oop java_lang_reflect_Field::type_annotations(oop field) { 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 return field->obj_field(type_annotations_offset); 2734 } 2735 2736 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2738 assert(has_type_annotations_field(), "type_annotations field must be present"); 2739 field->obj_field_put(type_annotations_offset, value); 2740 } 2741 2742 void reflect_ConstantPool::compute_offsets() { 2743 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2744 // This null test can be removed post beta 2745 if (k != NULL) { 2746 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2747 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2748 } 2749 } 2750 2751 void java_lang_reflect_Parameter::compute_offsets() { 2752 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2753 if(NULL != k) { 2754 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2755 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2756 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2757 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2758 } 2759 } 2760 2761 Handle java_lang_reflect_Parameter::create(TRAPS) { 2762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2763 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2764 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2765 InstanceKlass* ik = InstanceKlass::cast(k); 2766 // Ensure it is initialized 2767 ik->initialize(CHECK_NH); 2768 return ik->allocate_instance_handle(THREAD); 2769 } 2770 2771 oop java_lang_reflect_Parameter::name(oop param) { 2772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2773 return param->obj_field(name_offset); 2774 } 2775 2776 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2778 param->obj_field_put(name_offset, value); 2779 } 2780 2781 int java_lang_reflect_Parameter::modifiers(oop param) { 2782 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2783 return param->int_field(modifiers_offset); 2784 } 2785 2786 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2788 param->int_field_put(modifiers_offset, value); 2789 } 2790 2791 int java_lang_reflect_Parameter::index(oop param) { 2792 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2793 return param->int_field(index_offset); 2794 } 2795 2796 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2798 param->int_field_put(index_offset, value); 2799 } 2800 2801 oop java_lang_reflect_Parameter::executable(oop param) { 2802 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2803 return param->obj_field(executable_offset); 2804 } 2805 2806 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2808 param->obj_field_put(executable_offset, value); 2809 } 2810 2811 2812 int java_lang_Module::loader_offset; 2813 int java_lang_Module::name_offset; 2814 int java_lang_Module::_module_entry_offset = -1; 2815 2816 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 2817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2818 2819 Symbol* name = vmSymbols::java_lang_Module(); 2820 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2821 InstanceKlass* ik = InstanceKlass::cast(k); 2822 Handle jlmh = ik->allocate_instance_handle(CHECK_NH); 2823 JavaValue result(T_VOID); 2824 JavaCalls::call_special(&result, jlmh, ik, 2825 vmSymbols::object_initializer_name(), 2826 vmSymbols::java_lang_module_init_signature(), 2827 loader, module_name, CHECK_NH); 2828 return jlmh; 2829 } 2830 2831 void java_lang_Module::compute_offsets() { 2832 Klass* k = SystemDictionary::Module_klass(); 2833 if(NULL != k) { 2834 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2835 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2836 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2837 } 2838 } 2839 2840 2841 oop java_lang_Module::loader(oop module) { 2842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2843 return module->obj_field(loader_offset); 2844 } 2845 2846 void java_lang_Module::set_loader(oop module, oop value) { 2847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2848 module->obj_field_put(loader_offset, value); 2849 } 2850 2851 oop java_lang_Module::name(oop module) { 2852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2853 return module->obj_field(name_offset); 2854 } 2855 2856 void java_lang_Module::set_name(oop module, oop value) { 2857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2858 module->obj_field_put(name_offset, value); 2859 } 2860 2861 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) { 2862 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2863 assert(module != NULL, "module can't be null"); 2864 assert(module->is_oop(), "module must be oop"); 2865 2866 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2867 if (module_entry == NULL) { 2868 // If the inject field containing the ModuleEntry* is null then return the 2869 // class loader's unnamed module. 2870 oop loader = java_lang_Module::loader(module); 2871 Handle h_loader = Handle(THREAD, loader); 2872 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2873 return loader_cld->unnamed_module(); 2874 } 2875 return module_entry; 2876 } 2877 2878 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2879 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2880 assert(module != NULL, "module can't be null"); 2881 assert(module->is_oop(), "module must be oop"); 2882 module->address_field_put(_module_entry_offset, (address)module_entry); 2883 } 2884 2885 Handle reflect_ConstantPool::create(TRAPS) { 2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2887 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 2888 // Ensure it is initialized 2889 k->initialize(CHECK_NH); 2890 return k->allocate_instance_handle(THREAD); 2891 } 2892 2893 2894 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2896 oop mirror = value->pool_holder()->java_mirror(); 2897 // Save the mirror to get back the constant pool. 2898 reflect->obj_field_put(_oop_offset, mirror); 2899 } 2900 2901 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2902 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2903 2904 oop mirror = reflect->obj_field(_oop_offset); 2905 Klass* k = java_lang_Class::as_Klass(mirror); 2906 assert(k->is_instance_klass(), "Must be"); 2907 2908 // Get the constant pool back from the klass. Since class redefinition 2909 // merges the new constant pool into the old, this is essentially the 2910 // same constant pool as the original. If constant pool merging is 2911 // no longer done in the future, this will have to change to save 2912 // the original. 2913 return InstanceKlass::cast(k)->constants(); 2914 } 2915 2916 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2917 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2918 // This null test can be removed post beta 2919 if (k != NULL) { 2920 compute_offset(_base_offset, k, 2921 vmSymbols::base_name(), vmSymbols::object_signature()); 2922 } 2923 } 2924 2925 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2926 Klass* k = SystemDictionary::box_klass(type); 2927 if (k == NULL) return NULL; 2928 InstanceKlass* ik = InstanceKlass::cast(k); 2929 if (!ik->is_initialized()) ik->initialize(CHECK_0); 2930 return ik->allocate_instance(THREAD); 2931 } 2932 2933 2934 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2935 oop box = initialize_and_allocate(type, CHECK_0); 2936 if (box == NULL) return NULL; 2937 switch (type) { 2938 case T_BOOLEAN: 2939 box->bool_field_put(value_offset, value->z); 2940 break; 2941 case T_CHAR: 2942 box->char_field_put(value_offset, value->c); 2943 break; 2944 case T_FLOAT: 2945 box->float_field_put(value_offset, value->f); 2946 break; 2947 case T_DOUBLE: 2948 box->double_field_put(long_value_offset, value->d); 2949 break; 2950 case T_BYTE: 2951 box->byte_field_put(value_offset, value->b); 2952 break; 2953 case T_SHORT: 2954 box->short_field_put(value_offset, value->s); 2955 break; 2956 case T_INT: 2957 box->int_field_put(value_offset, value->i); 2958 break; 2959 case T_LONG: 2960 box->long_field_put(long_value_offset, value->j); 2961 break; 2962 default: 2963 return NULL; 2964 } 2965 return box; 2966 } 2967 2968 2969 BasicType java_lang_boxing_object::basic_type(oop box) { 2970 if (box == NULL) return T_ILLEGAL; 2971 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2972 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2973 return T_ILLEGAL; 2974 return type; 2975 } 2976 2977 2978 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2979 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2980 switch (type) { 2981 case T_BOOLEAN: 2982 value->z = box->bool_field(value_offset); 2983 break; 2984 case T_CHAR: 2985 value->c = box->char_field(value_offset); 2986 break; 2987 case T_FLOAT: 2988 value->f = box->float_field(value_offset); 2989 break; 2990 case T_DOUBLE: 2991 value->d = box->double_field(long_value_offset); 2992 break; 2993 case T_BYTE: 2994 value->b = box->byte_field(value_offset); 2995 break; 2996 case T_SHORT: 2997 value->s = box->short_field(value_offset); 2998 break; 2999 case T_INT: 3000 value->i = box->int_field(value_offset); 3001 break; 3002 case T_LONG: 3003 value->j = box->long_field(long_value_offset); 3004 break; 3005 default: 3006 return T_ILLEGAL; 3007 } // end switch 3008 return type; 3009 } 3010 3011 3012 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3013 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3014 switch (type) { 3015 case T_BOOLEAN: 3016 box->bool_field_put(value_offset, value->z); 3017 break; 3018 case T_CHAR: 3019 box->char_field_put(value_offset, value->c); 3020 break; 3021 case T_FLOAT: 3022 box->float_field_put(value_offset, value->f); 3023 break; 3024 case T_DOUBLE: 3025 box->double_field_put(long_value_offset, value->d); 3026 break; 3027 case T_BYTE: 3028 box->byte_field_put(value_offset, value->b); 3029 break; 3030 case T_SHORT: 3031 box->short_field_put(value_offset, value->s); 3032 break; 3033 case T_INT: 3034 box->int_field_put(value_offset, value->i); 3035 break; 3036 case T_LONG: 3037 box->long_field_put(long_value_offset, value->j); 3038 break; 3039 default: 3040 return T_ILLEGAL; 3041 } // end switch 3042 return type; 3043 } 3044 3045 3046 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3047 switch (type) { 3048 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3049 case T_CHAR: st->print("%d", value->c); break; 3050 case T_BYTE: st->print("%d", value->b); break; 3051 case T_SHORT: st->print("%d", value->s); break; 3052 case T_INT: st->print("%d", value->i); break; 3053 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3054 case T_FLOAT: st->print("%f", value->f); break; 3055 case T_DOUBLE: st->print("%lf", value->d); break; 3056 default: st->print("type %d?", type); break; 3057 } 3058 } 3059 3060 // Support for java_lang_ref_SoftReference 3061 3062 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3063 return ref->long_field(timestamp_offset); 3064 } 3065 3066 jlong java_lang_ref_SoftReference::clock() { 3067 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3068 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3069 return *offset; 3070 } 3071 3072 void java_lang_ref_SoftReference::set_clock(jlong value) { 3073 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3074 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3075 *offset = value; 3076 } 3077 3078 // Support for java_lang_invoke_DirectMethodHandle 3079 3080 int java_lang_invoke_DirectMethodHandle::_member_offset; 3081 3082 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3083 oop member_name = NULL; 3084 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3085 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3086 if (is_dmh) { 3087 member_name = dmh->obj_field(member_offset_in_bytes()); 3088 } 3089 return member_name; 3090 } 3091 3092 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3093 Klass* k = SystemDictionary::DirectMethodHandle_klass(); 3094 if (k != NULL) { 3095 compute_offset(_member_offset, k, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3096 } 3097 } 3098 3099 // Support for java_lang_invoke_MethodHandle 3100 3101 int java_lang_invoke_MethodHandle::_type_offset; 3102 int java_lang_invoke_MethodHandle::_form_offset; 3103 3104 int java_lang_invoke_MemberName::_clazz_offset; 3105 int java_lang_invoke_MemberName::_name_offset; 3106 int java_lang_invoke_MemberName::_type_offset; 3107 int java_lang_invoke_MemberName::_flags_offset; 3108 int java_lang_invoke_MemberName::_method_offset; 3109 int java_lang_invoke_MemberName::_vmindex_offset; 3110 3111 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3112 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3113 3114 int java_lang_invoke_LambdaForm::_vmentry_offset; 3115 3116 void java_lang_invoke_MethodHandle::compute_offsets() { 3117 Klass* k = SystemDictionary::MethodHandle_klass(); 3118 if (k != NULL) { 3119 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3120 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3121 } 3122 } 3123 3124 void java_lang_invoke_MemberName::compute_offsets() { 3125 Klass* k = SystemDictionary::MemberName_klass(); 3126 assert (k != NULL, "jdk mismatch"); 3127 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3128 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 3129 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 3130 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 3131 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature()); 3132 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3133 } 3134 3135 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3136 Klass* k = SystemDictionary::ResolvedMethodName_klass(); 3137 assert(k != NULL, "jdk mismatch"); 3138 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3139 } 3140 3141 void java_lang_invoke_LambdaForm::compute_offsets() { 3142 Klass* k = SystemDictionary::LambdaForm_klass(); 3143 assert (k != NULL, "jdk mismatch"); 3144 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3145 } 3146 3147 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3148 return obj != NULL && is_subclass(obj->klass()); 3149 } 3150 3151 3152 oop java_lang_invoke_MethodHandle::type(oop mh) { 3153 return mh->obj_field(_type_offset); 3154 } 3155 3156 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3157 mh->obj_field_put(_type_offset, mtype); 3158 } 3159 3160 oop java_lang_invoke_MethodHandle::form(oop mh) { 3161 assert(_form_offset != 0, ""); 3162 return mh->obj_field(_form_offset); 3163 } 3164 3165 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3166 assert(_form_offset != 0, ""); 3167 mh->obj_field_put(_form_offset, lform); 3168 } 3169 3170 /// MemberName accessors 3171 3172 oop java_lang_invoke_MemberName::clazz(oop mname) { 3173 assert(is_instance(mname), "wrong type"); 3174 return mname->obj_field(_clazz_offset); 3175 } 3176 3177 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3178 assert(is_instance(mname), "wrong type"); 3179 mname->obj_field_put(_clazz_offset, clazz); 3180 } 3181 3182 oop java_lang_invoke_MemberName::name(oop mname) { 3183 assert(is_instance(mname), "wrong type"); 3184 return mname->obj_field(_name_offset); 3185 } 3186 3187 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3188 assert(is_instance(mname), "wrong type"); 3189 mname->obj_field_put(_name_offset, name); 3190 } 3191 3192 oop java_lang_invoke_MemberName::type(oop mname) { 3193 assert(is_instance(mname), "wrong type"); 3194 return mname->obj_field(_type_offset); 3195 } 3196 3197 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3198 assert(is_instance(mname), "wrong type"); 3199 mname->obj_field_put(_type_offset, type); 3200 } 3201 3202 int java_lang_invoke_MemberName::flags(oop mname) { 3203 assert(is_instance(mname), "wrong type"); 3204 return mname->int_field(_flags_offset); 3205 } 3206 3207 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3208 assert(is_instance(mname), "wrong type"); 3209 mname->int_field_put(_flags_offset, flags); 3210 } 3211 3212 3213 // Return vmtarget from ResolvedMethodName method field through indirection 3214 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3215 assert(is_instance(mname), "wrong type"); 3216 oop method = mname->obj_field(_method_offset); 3217 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3218 } 3219 3220 bool java_lang_invoke_MemberName::is_method(oop mname) { 3221 assert(is_instance(mname), "must be MemberName"); 3222 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3223 } 3224 3225 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3226 assert(is_instance(mname), "wrong type"); 3227 mname->obj_field_put(_method_offset, resolved_method); 3228 } 3229 3230 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3231 assert(is_instance(mname), "wrong type"); 3232 return (intptr_t) mname->address_field(_vmindex_offset); 3233 } 3234 3235 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3236 assert(is_instance(mname), "wrong type"); 3237 mname->address_field_put(_vmindex_offset, (address) index); 3238 } 3239 3240 3241 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3242 assert(is_instance(resolved_method), "wrong type"); 3243 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3244 assert(m->is_method(), "must be"); 3245 return m; 3246 } 3247 3248 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3249 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3250 assert(is_instance(resolved_method), "wrong type"); 3251 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3252 } 3253 3254 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3255 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3256 oop resolved_method = ResolvedMethodTable::find_method(m()); 3257 if (resolved_method == NULL) { 3258 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3259 if (!k->is_initialized()) { 3260 k->initialize(CHECK_NULL); 3261 } 3262 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3263 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3264 // Add a reference to the loader (actually mirror because anonymous classes will not have 3265 // distinct loaders) to ensure the metadata is kept alive. 3266 // This mirror may be different than the one in clazz field. 3267 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3268 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3269 } 3270 return resolved_method; 3271 } 3272 3273 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3274 assert(is_instance(lform), "wrong type"); 3275 return lform->obj_field(_vmentry_offset); 3276 } 3277 3278 3279 // Support for java_lang_invoke_MethodType 3280 3281 int java_lang_invoke_MethodType::_rtype_offset; 3282 int java_lang_invoke_MethodType::_ptypes_offset; 3283 3284 void java_lang_invoke_MethodType::compute_offsets() { 3285 Klass* k = SystemDictionary::MethodType_klass(); 3286 if (k != NULL) { 3287 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3288 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3289 } 3290 } 3291 3292 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3293 st->print("("); 3294 objArrayOop pts = ptypes(mt); 3295 for (int i = 0, limit = pts->length(); i < limit; i++) { 3296 java_lang_Class::print_signature(pts->obj_at(i), st); 3297 } 3298 st->print(")"); 3299 java_lang_Class::print_signature(rtype(mt), st); 3300 } 3301 3302 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3303 ResourceMark rm; 3304 stringStream buffer(128); 3305 print_signature(mt, &buffer); 3306 const char* sigstr = buffer.base(); 3307 int siglen = (int) buffer.size(); 3308 Symbol *name; 3309 if (!intern_if_not_found) { 3310 name = SymbolTable::probe(sigstr, siglen); 3311 } else { 3312 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3313 } 3314 return name; 3315 } 3316 3317 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3318 if (mt1 == mt2) 3319 return true; 3320 if (rtype(mt1) != rtype(mt2)) 3321 return false; 3322 if (ptype_count(mt1) != ptype_count(mt2)) 3323 return false; 3324 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3325 if (ptype(mt1, i) != ptype(mt2, i)) 3326 return false; 3327 } 3328 return true; 3329 } 3330 3331 oop java_lang_invoke_MethodType::rtype(oop mt) { 3332 assert(is_instance(mt), "must be a MethodType"); 3333 return mt->obj_field(_rtype_offset); 3334 } 3335 3336 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3337 assert(is_instance(mt), "must be a MethodType"); 3338 return (objArrayOop) mt->obj_field(_ptypes_offset); 3339 } 3340 3341 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3342 return ptypes(mt)->obj_at(idx); 3343 } 3344 3345 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3346 return ptypes(mt)->length(); 3347 } 3348 3349 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3350 objArrayOop pts = ptypes(mt); 3351 int count = pts->length(); 3352 int slots = 0; 3353 for (int i = 0; i < count; i++) { 3354 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3355 slots += type2size[bt]; 3356 } 3357 return slots; 3358 } 3359 3360 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3361 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3362 return type2size[bt]; 3363 } 3364 3365 3366 // Support for java_lang_invoke_CallSite 3367 3368 int java_lang_invoke_CallSite::_target_offset; 3369 int java_lang_invoke_CallSite::_context_offset; 3370 3371 void java_lang_invoke_CallSite::compute_offsets() { 3372 Klass* k = SystemDictionary::CallSite_klass(); 3373 if (k != NULL) { 3374 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3375 compute_offset(_context_offset, k, vmSymbols::context_name(), 3376 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3377 } 3378 } 3379 3380 oop java_lang_invoke_CallSite::context(oop call_site) { 3381 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3382 3383 oop dep_oop = call_site->obj_field(_context_offset); 3384 return dep_oop; 3385 } 3386 3387 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3388 3389 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3390 3391 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3392 Klass* k = SystemDictionary::Context_klass(); 3393 if (k != NULL) { 3394 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3395 } 3396 } 3397 3398 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3399 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3400 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3401 DependencyContext dep_ctx(vmdeps_addr); 3402 return dep_ctx; 3403 } 3404 3405 // Support for java_security_AccessControlContext 3406 3407 int java_security_AccessControlContext::_context_offset = 0; 3408 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3409 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3410 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3411 3412 void java_security_AccessControlContext::compute_offsets() { 3413 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3414 fieldDescriptor fd; 3415 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3416 3417 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3418 fatal("Invalid layout of java.security.AccessControlContext"); 3419 } 3420 _context_offset = fd.offset(); 3421 3422 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3423 fatal("Invalid layout of java.security.AccessControlContext"); 3424 } 3425 _privilegedContext_offset = fd.offset(); 3426 3427 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3428 fatal("Invalid layout of java.security.AccessControlContext"); 3429 } 3430 _isPrivileged_offset = fd.offset(); 3431 3432 // The offset may not be present for bootstrapping with older JDK. 3433 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3434 _isAuthorized_offset = fd.offset(); 3435 } 3436 } 3437 3438 3439 bool java_security_AccessControlContext::is_authorized(Handle context) { 3440 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3441 assert(_isAuthorized_offset != -1, "should be set"); 3442 return context->bool_field(_isAuthorized_offset) != 0; 3443 } 3444 3445 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3446 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3447 // Ensure klass is initialized 3448 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3449 // Allocate result 3450 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3451 // Fill in values 3452 result->obj_field_put(_context_offset, context()); 3453 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3454 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3455 // whitelist AccessControlContexts created by the JVM if present 3456 if (_isAuthorized_offset != -1) { 3457 result->bool_field_put(_isAuthorized_offset, true); 3458 } 3459 return result; 3460 } 3461 3462 3463 // Support for java_lang_ClassLoader 3464 3465 bool java_lang_ClassLoader::offsets_computed = false; 3466 int java_lang_ClassLoader::_loader_data_offset = -1; 3467 int java_lang_ClassLoader::parallelCapable_offset = -1; 3468 int java_lang_ClassLoader::name_offset = -1; 3469 int java_lang_ClassLoader::unnamedModule_offset = -1; 3470 3471 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3472 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3473 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3474 } 3475 3476 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3477 return *java_lang_ClassLoader::loader_data_addr(loader); 3478 } 3479 3480 void java_lang_ClassLoader::compute_offsets() { 3481 assert(!offsets_computed, "offsets should be initialized only once"); 3482 offsets_computed = true; 3483 3484 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3485 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3486 compute_optional_offset(parallelCapable_offset, 3487 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3488 3489 compute_offset(name_offset, 3490 k1, vmSymbols::name_name(), vmSymbols::string_signature()); 3491 3492 compute_offset(unnamedModule_offset, 3493 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3494 3495 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3496 } 3497 3498 oop java_lang_ClassLoader::parent(oop loader) { 3499 assert(is_instance(loader), "loader must be oop"); 3500 return loader->obj_field(parent_offset); 3501 } 3502 3503 oop java_lang_ClassLoader::name(oop loader) { 3504 assert(is_instance(loader), "loader must be oop"); 3505 return loader->obj_field(name_offset); 3506 } 3507 3508 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3509 assert(is_instance(loader), "loader must be oop"); 3510 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3511 oop acl = loader; 3512 debug_only(jint loop_count = 0); 3513 // This loop taken verbatim from ClassLoader.java: 3514 do { 3515 acl = parent(acl); 3516 if (cl == acl) { 3517 return true; 3518 } 3519 assert(++loop_count > 0, "loop_count overflow"); 3520 } while (acl != NULL); 3521 return false; 3522 } 3523 3524 bool java_lang_ClassLoader::is_instance(oop obj) { 3525 return obj != NULL && is_subclass(obj->klass()); 3526 } 3527 3528 3529 // For class loader classes, parallelCapable defined 3530 // based on non-null field 3531 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3532 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3533 if (parallelCapable_offset == -1) { 3534 // Default for backward compatibility is false 3535 return false; 3536 } 3537 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3538 } 3539 3540 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3541 // Fix for 4474172; see evaluation for more details 3542 loader = non_reflection_class_loader(loader); 3543 3544 oop cl = SystemDictionary::java_system_loader(); 3545 while(cl != NULL) { 3546 if (cl == loader) return true; 3547 cl = parent(cl); 3548 } 3549 return false; 3550 } 3551 3552 // Return true if this is one of the class loaders associated with 3553 // the generated bytecodes for reflection. 3554 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3555 if (loader != NULL) { 3556 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3557 // This might be null in non-1.4 JDKs 3558 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3559 } 3560 return false; 3561 } 3562 3563 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3564 // See whether this is one of the class loaders associated with 3565 // the generated bytecodes for reflection, and if so, "magically" 3566 // delegate to its parent to prevent class loading from occurring 3567 // in places where applications using reflection didn't expect it. 3568 if (is_reflection_class_loader(loader)) { 3569 return parent(loader); 3570 } 3571 return loader; 3572 } 3573 3574 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3575 assert(is_instance(loader), "loader must be oop"); 3576 return loader->obj_field(unnamedModule_offset); 3577 } 3578 3579 // Support for java_lang_System 3580 int java_lang_System::in_offset_in_bytes() { 3581 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3582 } 3583 3584 3585 int java_lang_System::out_offset_in_bytes() { 3586 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3587 } 3588 3589 3590 int java_lang_System::err_offset_in_bytes() { 3591 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3592 } 3593 3594 3595 bool java_lang_System::has_security_manager() { 3596 InstanceKlass* ik = SystemDictionary::System_klass(); 3597 address addr = ik->static_field_addr(static_security_offset); 3598 if (UseCompressedOops) { 3599 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3600 } else { 3601 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3602 } 3603 } 3604 3605 int java_lang_Class::_klass_offset; 3606 int java_lang_Class::_array_klass_offset; 3607 int java_lang_Class::_oop_size_offset; 3608 int java_lang_Class::_static_oop_field_count_offset; 3609 int java_lang_Class::_class_loader_offset; 3610 int java_lang_Class::_module_offset; 3611 int java_lang_Class::_protection_domain_offset; 3612 int java_lang_Class::_component_mirror_offset; 3613 int java_lang_Class::_init_lock_offset; 3614 int java_lang_Class::_signers_offset; 3615 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3616 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3617 int java_lang_Throwable::backtrace_offset; 3618 int java_lang_Throwable::detailMessage_offset; 3619 int java_lang_Throwable::stackTrace_offset; 3620 int java_lang_Throwable::depth_offset; 3621 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3622 int java_lang_reflect_AccessibleObject::override_offset; 3623 int java_lang_reflect_Method::clazz_offset; 3624 int java_lang_reflect_Method::name_offset; 3625 int java_lang_reflect_Method::returnType_offset; 3626 int java_lang_reflect_Method::parameterTypes_offset; 3627 int java_lang_reflect_Method::exceptionTypes_offset; 3628 int java_lang_reflect_Method::slot_offset; 3629 int java_lang_reflect_Method::modifiers_offset; 3630 int java_lang_reflect_Method::signature_offset; 3631 int java_lang_reflect_Method::annotations_offset; 3632 int java_lang_reflect_Method::parameter_annotations_offset; 3633 int java_lang_reflect_Method::annotation_default_offset; 3634 int java_lang_reflect_Method::type_annotations_offset; 3635 int java_lang_reflect_Constructor::clazz_offset; 3636 int java_lang_reflect_Constructor::parameterTypes_offset; 3637 int java_lang_reflect_Constructor::exceptionTypes_offset; 3638 int java_lang_reflect_Constructor::slot_offset; 3639 int java_lang_reflect_Constructor::modifiers_offset; 3640 int java_lang_reflect_Constructor::signature_offset; 3641 int java_lang_reflect_Constructor::annotations_offset; 3642 int java_lang_reflect_Constructor::parameter_annotations_offset; 3643 int java_lang_reflect_Constructor::type_annotations_offset; 3644 int java_lang_reflect_Field::clazz_offset; 3645 int java_lang_reflect_Field::name_offset; 3646 int java_lang_reflect_Field::type_offset; 3647 int java_lang_reflect_Field::slot_offset; 3648 int java_lang_reflect_Field::modifiers_offset; 3649 int java_lang_reflect_Field::signature_offset; 3650 int java_lang_reflect_Field::annotations_offset; 3651 int java_lang_reflect_Field::type_annotations_offset; 3652 int java_lang_reflect_Parameter::name_offset; 3653 int java_lang_reflect_Parameter::modifiers_offset; 3654 int java_lang_reflect_Parameter::index_offset; 3655 int java_lang_reflect_Parameter::executable_offset; 3656 int java_lang_boxing_object::value_offset; 3657 int java_lang_boxing_object::long_value_offset; 3658 int java_lang_ref_Reference::referent_offset; 3659 int java_lang_ref_Reference::queue_offset; 3660 int java_lang_ref_Reference::next_offset; 3661 int java_lang_ref_Reference::discovered_offset; 3662 int java_lang_ref_Reference::number_of_fake_oop_fields; 3663 int java_lang_ref_SoftReference::timestamp_offset; 3664 int java_lang_ref_SoftReference::static_clock_offset; 3665 int java_lang_ClassLoader::parent_offset; 3666 int java_lang_System::static_in_offset; 3667 int java_lang_System::static_out_offset; 3668 int java_lang_System::static_err_offset; 3669 int java_lang_System::static_security_offset; 3670 int java_lang_StackTraceElement::methodName_offset; 3671 int java_lang_StackTraceElement::fileName_offset; 3672 int java_lang_StackTraceElement::lineNumber_offset; 3673 int java_lang_StackTraceElement::moduleName_offset; 3674 int java_lang_StackTraceElement::moduleVersion_offset; 3675 int java_lang_StackTraceElement::classLoaderName_offset; 3676 int java_lang_StackTraceElement::declaringClass_offset; 3677 int java_lang_StackTraceElement::declaringClassObject_offset; 3678 int java_lang_StackFrameInfo::_declaringClass_offset; 3679 int java_lang_StackFrameInfo::_memberName_offset; 3680 int java_lang_StackFrameInfo::_bci_offset; 3681 int java_lang_StackFrameInfo::_version_offset; 3682 int java_lang_LiveStackFrameInfo::_monitors_offset; 3683 int java_lang_LiveStackFrameInfo::_locals_offset; 3684 int java_lang_LiveStackFrameInfo::_operands_offset; 3685 int java_lang_LiveStackFrameInfo::_mode_offset; 3686 int java_lang_AssertionStatusDirectives::classes_offset; 3687 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3688 int java_lang_AssertionStatusDirectives::packages_offset; 3689 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3690 int java_lang_AssertionStatusDirectives::deflt_offset; 3691 int java_nio_Buffer::_limit_offset; 3692 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3693 int reflect_ConstantPool::_oop_offset; 3694 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3695 3696 3697 // Support for java_lang_StackTraceElement 3698 3699 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3700 element->obj_field_put(fileName_offset, value); 3701 } 3702 3703 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3704 element->obj_field_put(declaringClass_offset, value); 3705 } 3706 3707 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3708 element->obj_field_put(methodName_offset, value); 3709 } 3710 3711 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3712 element->int_field_put(lineNumber_offset, value); 3713 } 3714 3715 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3716 element->obj_field_put(moduleName_offset, value); 3717 } 3718 3719 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3720 element->obj_field_put(moduleVersion_offset, value); 3721 } 3722 3723 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 3724 element->obj_field_put(classLoaderName_offset, value); 3725 } 3726 3727 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 3728 element->obj_field_put(declaringClassObject_offset, value); 3729 } 3730 3731 // Support for java_lang_StackFrameInfo 3732 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3733 element->obj_field_put(_declaringClass_offset, value); 3734 } 3735 3736 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3737 element->short_field_put(_version_offset, value); 3738 } 3739 3740 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3741 element->int_field_put(_bci_offset, value); 3742 } 3743 3744 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3745 element->obj_field_put(_monitors_offset, value); 3746 } 3747 3748 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3749 element->obj_field_put(_locals_offset, value); 3750 } 3751 3752 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3753 element->obj_field_put(_operands_offset, value); 3754 } 3755 3756 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3757 element->int_field_put(_mode_offset, value); 3758 } 3759 3760 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3761 3762 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3763 o->obj_field_put(classes_offset, val); 3764 } 3765 3766 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3767 o->obj_field_put(classEnabled_offset, val); 3768 } 3769 3770 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3771 o->obj_field_put(packages_offset, val); 3772 } 3773 3774 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3775 o->obj_field_put(packageEnabled_offset, val); 3776 } 3777 3778 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3779 o->bool_field_put(deflt_offset, val); 3780 } 3781 3782 3783 // Support for intrinsification of java.nio.Buffer.checkIndex 3784 int java_nio_Buffer::limit_offset() { 3785 return _limit_offset; 3786 } 3787 3788 3789 void java_nio_Buffer::compute_offsets() { 3790 Klass* k = SystemDictionary::nio_Buffer_klass(); 3791 assert(k != NULL, "must be loaded in 1.4+"); 3792 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3793 } 3794 3795 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3796 if (_owner_offset != 0) return; 3797 3798 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3799 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3800 compute_offset(_owner_offset, k, 3801 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3802 } 3803 3804 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3805 assert(_owner_offset != 0, "Must be initialized"); 3806 return obj->obj_field(_owner_offset); 3807 } 3808 3809 // Compute hard-coded offsets 3810 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3811 // are not available to determine the offset_of_static_fields. 3812 void JavaClasses::compute_hard_coded_offsets() { 3813 const int x = heapOopSize; 3814 const int header = instanceOopDesc::base_offset_in_bytes(); 3815 3816 // Throwable Class 3817 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3818 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3819 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3820 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3821 3822 // java_lang_boxing_object 3823 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3824 java_lang_boxing_object::long_value_offset = align_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3825 3826 // java_lang_ref_Reference: 3827 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3828 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3829 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3830 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3831 // Artificial fields for java_lang_ref_Reference 3832 // The first field is for the discovered field added in 1.4 3833 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3834 3835 // java_lang_ref_SoftReference Class 3836 java_lang_ref_SoftReference::timestamp_offset = align_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3837 // Don't multiply static fields because they are always in wordSize units 3838 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3839 3840 // java_lang_ClassLoader 3841 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3842 3843 // java_lang_System 3844 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3845 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3846 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3847 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3848 3849 // java_lang_StackTraceElement 3850 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header; 3851 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header; 3852 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3853 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3854 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3855 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3856 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3857 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3858 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3859 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3860 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3861 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3862 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3863 3864 } 3865 3866 3867 // Compute non-hard-coded field offsets of all the classes in this file 3868 void JavaClasses::compute_offsets() { 3869 // java_lang_Class::compute_offsets was called earlier in bootstrap 3870 java_lang_ClassLoader::compute_offsets(); 3871 java_lang_Throwable::compute_offsets(); 3872 java_lang_Thread::compute_offsets(); 3873 java_lang_ThreadGroup::compute_offsets(); 3874 java_lang_invoke_MethodHandle::compute_offsets(); 3875 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3876 java_lang_invoke_MemberName::compute_offsets(); 3877 java_lang_invoke_ResolvedMethodName::compute_offsets(); 3878 java_lang_invoke_LambdaForm::compute_offsets(); 3879 java_lang_invoke_MethodType::compute_offsets(); 3880 java_lang_invoke_CallSite::compute_offsets(); 3881 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3882 java_security_AccessControlContext::compute_offsets(); 3883 // Initialize reflection classes. The layouts of these classes 3884 // changed with the new reflection implementation in JDK 1.4, and 3885 // since the Universe doesn't know what JDK version it is until this 3886 // point we defer computation of these offsets until now. 3887 java_lang_reflect_AccessibleObject::compute_offsets(); 3888 java_lang_reflect_Method::compute_offsets(); 3889 java_lang_reflect_Constructor::compute_offsets(); 3890 java_lang_reflect_Field::compute_offsets(); 3891 java_nio_Buffer::compute_offsets(); 3892 reflect_ConstantPool::compute_offsets(); 3893 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3894 java_lang_reflect_Parameter::compute_offsets(); 3895 java_lang_Module::compute_offsets(); 3896 java_lang_StackFrameInfo::compute_offsets(); 3897 java_lang_LiveStackFrameInfo::compute_offsets(); 3898 3899 // generated interpreter code wants to know about the offsets we just computed: 3900 AbstractAssembler::update_delayed_values(); 3901 } 3902 3903 #ifndef PRODUCT 3904 3905 // These functions exist to assert the validity of hard-coded field offsets to guard 3906 // against changes in the class files 3907 3908 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3909 EXCEPTION_MARK; 3910 fieldDescriptor fd; 3911 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3912 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3913 InstanceKlass* ik = InstanceKlass::cast(k); 3914 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3915 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3916 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3917 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3918 return false; 3919 } 3920 if (fd.is_static()) { 3921 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3922 return false; 3923 } 3924 if (fd.offset() == hardcoded_offset ) { 3925 return true; 3926 } else { 3927 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3928 klass_name, field_name, hardcoded_offset, fd.offset()); 3929 return false; 3930 } 3931 } 3932 3933 3934 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3935 EXCEPTION_MARK; 3936 fieldDescriptor fd; 3937 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3938 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3939 InstanceKlass* ik = InstanceKlass::cast(k); 3940 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3941 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3942 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3943 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3944 return false; 3945 } 3946 if (!fd.is_static()) { 3947 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3948 return false; 3949 } 3950 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3951 return true; 3952 } else { 3953 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()); 3954 return false; 3955 } 3956 } 3957 3958 3959 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3960 EXCEPTION_MARK; 3961 fieldDescriptor fd; 3962 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3963 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3964 InstanceKlass* ik = InstanceKlass::cast(k); 3965 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3966 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3967 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3968 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3969 return false; 3970 } 3971 if (!fd.is_static() || !fd.has_initial_value()) { 3972 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3973 return false; 3974 } 3975 if (!fd.initial_value_tag().is_int()) { 3976 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3977 return false; 3978 } 3979 jint field_value = fd.int_initial_value(); 3980 if (field_value == hardcoded_constant) { 3981 return true; 3982 } else { 3983 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); 3984 return false; 3985 } 3986 } 3987 3988 3989 // Check the hard-coded field offsets of all the classes in this file 3990 3991 void JavaClasses::check_offsets() { 3992 bool valid = true; 3993 3994 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3995 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3996 3997 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3998 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3999 4000 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4001 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 4002 4003 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 4004 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 4005 4006 // java.lang.String 4007 4008 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 4009 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 4010 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 4011 4012 // java.lang.Class 4013 4014 // Fake fields 4015 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 4016 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 4017 4018 // java.lang.Throwable 4019 4020 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 4021 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 4022 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 4023 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 4024 4025 // Boxed primitive objects (java_lang_boxing_object) 4026 4027 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4028 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4029 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4030 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4031 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4032 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4033 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4034 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4035 4036 // java.lang.ClassLoader 4037 4038 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 4039 4040 // java.lang.System 4041 4042 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4043 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4044 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4045 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4046 4047 // java.lang.StackTraceElement 4048 4049 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;"); 4050 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;"); 4051 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;"); 4052 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;"); 4053 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4054 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4055 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4056 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4057 4058 // java.lang.ref.Reference 4059 4060 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4061 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4062 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4063 // Fake field 4064 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4065 4066 // java.lang.ref.SoftReference 4067 4068 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4069 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4070 4071 // java.lang.AssertionStatusDirectives 4072 // 4073 // The CheckAssertionStatusDirectives boolean can be removed from here and 4074 // globals.hpp after the AssertionStatusDirectives class has been integrated 4075 // into merlin "for some time." Without it, the vm will fail with early 4076 // merlin builds. 4077 4078 if (CheckAssertionStatusDirectives) { 4079 const char* nm = "java/lang/AssertionStatusDirectives"; 4080 const char* sig = "[Ljava/lang/String;"; 4081 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4082 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4083 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4084 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4085 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4086 } 4087 4088 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4089 } 4090 4091 #endif // PRODUCT 4092 4093 int InjectedField::compute_offset() { 4094 InstanceKlass* ik = InstanceKlass::cast(klass()); 4095 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4096 if (!may_be_java && !fs.access_flags().is_internal()) { 4097 // Only look at injected fields 4098 continue; 4099 } 4100 if (fs.name() == name() && fs.signature() == signature()) { 4101 return fs.offset(); 4102 } 4103 } 4104 ResourceMark rm; 4105 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)" : ""); 4106 #ifndef PRODUCT 4107 ik->print(); 4108 tty->print_cr("all fields:"); 4109 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4110 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4111 } 4112 #endif //PRODUCT 4113 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4114 return -1; 4115 } 4116 4117 void javaClasses_init() { 4118 JavaClasses::compute_offsets(); 4119 JavaClasses::check_offsets(); 4120 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4121 }