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/preserveException.hpp" 58 59 #if INCLUDE_JVMCI 60 #include "jvmci/jvmciJavaClasses.hpp" 61 #endif 62 63 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 64 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 65 66 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 67 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 68 69 InjectedField JavaClasses::_injected_fields[] = { 70 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 71 }; 72 73 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 74 return _injected_fields[id].compute_offset(); 75 } 76 77 78 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 79 *field_count = 0; 80 81 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 82 if (sid == vmSymbols::NO_SID) { 83 // Only well known classes can inject fields 84 return NULL; 85 } 86 87 int count = 0; 88 int start = -1; 89 90 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 91 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 92 count++; \ 93 if (start == -1) start = klass##_##name##_enum; \ 94 } 95 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 96 #undef LOOKUP_INJECTED_FIELD 97 98 if (start != -1) { 99 *field_count = count; 100 return _injected_fields + start; 101 } 102 return NULL; 103 } 104 105 106 static bool find_field(InstanceKlass* ik, 107 Symbol* name_symbol, Symbol* signature_symbol, 108 fieldDescriptor* fd, 109 bool is_static = false, bool allow_super = false) { 110 if (allow_super || is_static) { 111 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 112 } else { 113 return ik->find_local_field(name_symbol, signature_symbol, fd); 114 } 115 } 116 117 // Helpful routine for computing field offsets at run time rather than hardcoding them 118 static void 119 compute_offset(int &dest_offset, 120 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 121 bool is_static = false, bool allow_super = false) { 122 fieldDescriptor fd; 123 InstanceKlass* ik = InstanceKlass::cast(klass); 124 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 125 ResourceMark rm; 126 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 127 #ifndef PRODUCT 128 ik->print(); 129 tty->print_cr("all fields:"); 130 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 131 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 132 } 133 #endif //PRODUCT 134 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 135 } 136 dest_offset = fd.offset(); 137 } 138 139 // Same as above but for "optional" offsets that might not be present in certain JDK versions 140 static void 141 compute_optional_offset(int& dest_offset, 142 Klass* klass, Symbol* name_symbol, Symbol* signature_symbol, 143 bool allow_super = false) { 144 fieldDescriptor fd; 145 InstanceKlass* ik = InstanceKlass::cast(klass); 146 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 147 dest_offset = fd.offset(); 148 } 149 } 150 151 152 int java_lang_String::value_offset = 0; 153 int java_lang_String::hash_offset = 0; 154 int java_lang_String::coder_offset = 0; 155 156 bool java_lang_String::initialized = false; 157 158 bool java_lang_String::is_instance(oop obj) { 159 return is_instance_inlined(obj); 160 } 161 162 void java_lang_String::compute_offsets() { 163 assert(!initialized, "offsets should be initialized only once"); 164 165 Klass* k = SystemDictionary::String_klass(); 166 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature()); 167 compute_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 168 compute_offset(coder_offset, k, vmSymbols::coder_name(), vmSymbols::byte_signature()); 169 170 initialized = true; 171 } 172 173 class CompactStringsFixup : public FieldClosure { 174 private: 175 bool _value; 176 177 public: 178 CompactStringsFixup(bool value) : _value(value) {} 179 180 void do_field(fieldDescriptor* fd) { 181 if (fd->name() == vmSymbols::compact_strings_name()) { 182 oop mirror = fd->field_holder()->java_mirror(); 183 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 184 assert(mirror != NULL, "String must have mirror already"); 185 mirror->bool_field_put(fd->offset(), _value); 186 } 187 } 188 }; 189 190 void java_lang_String::set_compact_strings(bool value) { 191 CompactStringsFixup fix(value); 192 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 193 } 194 195 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 196 assert(initialized, "Must be initialized"); 197 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 198 199 // Create the String object first, so there's a chance that the String 200 // and the char array it points to end up in the same cache line. 201 oop obj; 202 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 203 204 // Create the char array. The String object must be handlized here 205 // because GC can happen as a result of the allocation attempt. 206 Handle h_obj(THREAD, obj); 207 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 208 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 209 210 // Point the String at the char array 211 obj = h_obj(); 212 set_value(obj, buffer); 213 // No need to zero the offset, allocation zero'ed the entire String object 214 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 215 return h_obj; 216 } 217 218 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 219 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 220 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 221 typeArrayOop buffer = value(h_obj()); 222 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 223 if (is_latin1) { 224 for (int index = 0; index < length; index++) { 225 buffer->byte_at_put(index, (jbyte)unicode[index]); 226 } 227 } else { 228 for (int index = 0; index < length; index++) { 229 buffer->char_at_put(index, unicode[index]); 230 } 231 } 232 233 #ifdef ASSERT 234 { 235 ResourceMark rm; 236 char* expected = UNICODE::as_utf8(unicode, length); 237 char* actual = as_utf8_string(h_obj()); 238 if (strcmp(expected, actual) != 0) { 239 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 240 ShouldNotReachHere(); 241 } 242 } 243 #endif 244 245 return h_obj; 246 } 247 248 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 249 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 250 return h_obj(); 251 } 252 253 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 254 if (utf8_str == NULL) { 255 return Handle(); 256 } 257 bool has_multibyte, is_latin1; 258 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 259 if (!CompactStrings) { 260 has_multibyte = true; 261 is_latin1 = false; 262 } 263 264 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 265 if (length > 0) { 266 if (!has_multibyte) { 267 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 268 } else if (is_latin1) { 269 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 270 } else { 271 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 272 } 273 } 274 275 #ifdef ASSERT 276 // This check is too strict because the input string is not necessarily valid UTF8. 277 // For example, it may be created with arbitrary content via jni_NewStringUTF. 278 /* 279 { 280 ResourceMark rm; 281 const char* expected = utf8_str; 282 char* actual = as_utf8_string(h_obj()); 283 if (strcmp(expected, actual) != 0) { 284 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 285 ShouldNotReachHere(); 286 } 287 } 288 */ 289 #endif 290 291 return h_obj; 292 } 293 294 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 295 Handle h_obj = create_from_str(utf8_str, CHECK_0); 296 return h_obj(); 297 } 298 299 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 300 const char* utf8_str = (char*)symbol->bytes(); 301 int utf8_len = symbol->utf8_length(); 302 303 bool has_multibyte, is_latin1; 304 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 305 if (!CompactStrings) { 306 has_multibyte = true; 307 is_latin1 = false; 308 } 309 310 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 311 if (length > 0) { 312 if (!has_multibyte) { 313 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 314 } else if (is_latin1) { 315 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 316 } else { 317 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 318 } 319 } 320 321 #ifdef ASSERT 322 { 323 ResourceMark rm; 324 const char* expected = symbol->as_utf8(); 325 char* actual = as_utf8_string(h_obj()); 326 if (strncmp(expected, actual, utf8_len) != 0) { 327 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 328 ShouldNotReachHere(); 329 } 330 } 331 #endif 332 333 return h_obj; 334 } 335 336 // Converts a C string to a Java String based on current encoding 337 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 338 assert(str != NULL, "bad arguments"); 339 340 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 341 static to_java_string_fn_t _to_java_string_fn = NULL; 342 343 if (_to_java_string_fn == NULL) { 344 void *lib_handle = os::native_java_library(); 345 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 346 if (_to_java_string_fn == NULL) { 347 fatal("NewStringPlatform missing"); 348 } 349 } 350 351 jstring js = NULL; 352 { JavaThread* thread = (JavaThread*)THREAD; 353 assert(thread->is_Java_thread(), "must be java thread"); 354 HandleMark hm(thread); 355 ThreadToNativeFromVM ttn(thread); 356 js = (_to_java_string_fn)(thread->jni_environment(), str); 357 } 358 return Handle(THREAD, JNIHandles::resolve(js)); 359 } 360 361 // Converts a Java String to a native C string that can be used for 362 // native OS calls. 363 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 364 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 365 static to_platform_string_fn_t _to_platform_string_fn = NULL; 366 367 if (_to_platform_string_fn == NULL) { 368 void *lib_handle = os::native_java_library(); 369 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 370 if (_to_platform_string_fn == NULL) { 371 fatal("GetStringPlatformChars missing"); 372 } 373 } 374 375 char *native_platform_string; 376 { JavaThread* thread = (JavaThread*)THREAD; 377 assert(thread->is_Java_thread(), "must be java thread"); 378 JNIEnv *env = thread->jni_environment(); 379 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 380 bool is_copy; 381 HandleMark hm(thread); 382 ThreadToNativeFromVM ttn(thread); 383 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 384 assert(is_copy == JNI_TRUE, "is_copy value changed"); 385 JNIHandles::destroy_local(js); 386 } 387 return native_platform_string; 388 } 389 390 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 391 oop obj = java_string(); 392 // Typical usage is to convert all '/' to '.' in string. 393 typeArrayOop value = java_lang_String::value(obj); 394 int length = java_lang_String::length(obj); 395 bool is_latin1 = java_lang_String::is_latin1(obj); 396 397 // First check if any from_char exist 398 int index; // Declared outside, used later 399 for (index = 0; index < length; index++) { 400 jchar c = !is_latin1 ? value->char_at(index) : 401 ((jchar) value->byte_at(index)) & 0xff; 402 if (c == from_char) { 403 break; 404 } 405 } 406 if (index == length) { 407 // No from_char, so do not copy. 408 return java_string; 409 } 410 411 // Check if result string will be latin1 412 bool to_is_latin1 = false; 413 414 // Replacement char must be latin1 415 if (CompactStrings && UNICODE::is_latin1(to_char)) { 416 if (is_latin1) { 417 // Source string is latin1 as well 418 to_is_latin1 = true; 419 } else if (!UNICODE::is_latin1(from_char)) { 420 // We are replacing an UTF16 char. Scan string to 421 // check if result can be latin1 encoded. 422 to_is_latin1 = true; 423 for (index = 0; index < length; index++) { 424 jchar c = value->char_at(index); 425 if (c != from_char && !UNICODE::is_latin1(c)) { 426 to_is_latin1 = false; 427 break; 428 } 429 } 430 } 431 } 432 433 // Create new UNICODE (or byte) buffer. Must handlize value because GC 434 // may happen during String and char array creation. 435 typeArrayHandle h_value(THREAD, value); 436 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 437 typeArrayOop from_buffer = h_value(); 438 typeArrayOop to_buffer = java_lang_String::value(string()); 439 440 // Copy contents 441 for (index = 0; index < length; index++) { 442 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 443 ((jchar) from_buffer->byte_at(index)) & 0xff; 444 if (c == from_char) { 445 c = to_char; 446 } 447 if (!to_is_latin1) { 448 to_buffer->char_at_put(index, c); 449 } else { 450 to_buffer->byte_at_put(index, (jbyte) c); 451 } 452 } 453 return string; 454 } 455 456 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 457 typeArrayOop value = java_lang_String::value(java_string); 458 length = java_lang_String::length(java_string); 459 bool is_latin1 = java_lang_String::is_latin1(java_string); 460 461 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 462 if (result != NULL) { 463 if (!is_latin1) { 464 for (int index = 0; index < length; index++) { 465 result[index] = value->char_at(index); 466 } 467 } else { 468 for (int index = 0; index < length; index++) { 469 result[index] = ((jchar) value->byte_at(index)) & 0xff; 470 } 471 } 472 } else { 473 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 474 } 475 return result; 476 } 477 478 unsigned int java_lang_String::hash_code(oop java_string) { 479 int length = java_lang_String::length(java_string); 480 // Zero length string will hash to zero with String.hashCode() function. 481 if (length == 0) return 0; 482 483 typeArrayOop value = java_lang_String::value(java_string); 484 bool is_latin1 = java_lang_String::is_latin1(java_string); 485 486 if (is_latin1) { 487 return java_lang_String::hash_code(value->byte_at_addr(0), length); 488 } else { 489 return java_lang_String::hash_code(value->char_at_addr(0), length); 490 } 491 } 492 493 char* java_lang_String::as_quoted_ascii(oop java_string) { 494 typeArrayOop value = java_lang_String::value(java_string); 495 int length = java_lang_String::length(java_string); 496 bool is_latin1 = java_lang_String::is_latin1(java_string); 497 498 if (length == 0) return NULL; 499 500 char* result; 501 int result_length; 502 if (!is_latin1) { 503 jchar* base = value->char_at_addr(0); 504 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 505 result = NEW_RESOURCE_ARRAY(char, result_length); 506 UNICODE::as_quoted_ascii(base, length, result, result_length); 507 } else { 508 jbyte* base = value->byte_at_addr(0); 509 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 510 result = NEW_RESOURCE_ARRAY(char, result_length); 511 UNICODE::as_quoted_ascii(base, length, result, result_length); 512 } 513 assert(result_length >= length + 1, "must not be shorter"); 514 assert(result_length == (int)strlen(result) + 1, "must match"); 515 return result; 516 } 517 518 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 519 typeArrayOop value = java_lang_String::value(java_string); 520 int length = java_lang_String::length(java_string); 521 bool is_latin1 = java_lang_String::is_latin1(java_string); 522 if (!is_latin1) { 523 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 524 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 525 return sym; 526 } else { 527 ResourceMark rm; 528 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 529 const char* base = UNICODE::as_utf8(position, length); 530 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 531 return sym; 532 } 533 } 534 535 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 536 typeArrayOop value = java_lang_String::value(java_string); 537 int length = java_lang_String::length(java_string); 538 bool is_latin1 = java_lang_String::is_latin1(java_string); 539 if (!is_latin1) { 540 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 541 return SymbolTable::probe_unicode(base, length); 542 } else { 543 ResourceMark rm; 544 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 545 const char* base = UNICODE::as_utf8(position, length); 546 return SymbolTable::probe(base, length); 547 } 548 } 549 550 int java_lang_String::utf8_length(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 if (length == 0) { 555 return 0; 556 } 557 if (!is_latin1) { 558 return UNICODE::utf8_length(value->char_at_addr(0), length); 559 } else { 560 return UNICODE::utf8_length(value->byte_at_addr(0), length); 561 } 562 } 563 564 char* java_lang_String::as_utf8_string(oop java_string) { 565 typeArrayOop value = java_lang_String::value(java_string); 566 int length = java_lang_String::length(java_string); 567 bool is_latin1 = java_lang_String::is_latin1(java_string); 568 if (!is_latin1) { 569 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 570 return UNICODE::as_utf8(position, length); 571 } else { 572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 573 return UNICODE::as_utf8(position, length); 574 } 575 } 576 577 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 578 typeArrayOop value = java_lang_String::value(java_string); 579 int length = java_lang_String::length(java_string); 580 bool is_latin1 = java_lang_String::is_latin1(java_string); 581 if (!is_latin1) { 582 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 583 return UNICODE::as_utf8(position, length, buf, buflen); 584 } else { 585 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 586 return UNICODE::as_utf8(position, length, buf, buflen); 587 } 588 } 589 590 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 591 typeArrayOop value = java_lang_String::value(java_string); 592 int length = java_lang_String::length(java_string); 593 assert(start + len <= length, "just checking"); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* position = value->char_at_addr(start); 597 return UNICODE::as_utf8(position, len); 598 } else { 599 jbyte* position = value->byte_at_addr(start); 600 return UNICODE::as_utf8(position, len); 601 } 602 } 603 604 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 605 typeArrayOop value = java_lang_String::value(java_string); 606 int length = java_lang_String::length(java_string); 607 assert(start + len <= length, "just checking"); 608 bool is_latin1 = java_lang_String::is_latin1(java_string); 609 if (!is_latin1) { 610 jchar* position = value->char_at_addr(start); 611 return UNICODE::as_utf8(position, len, buf, buflen); 612 } else { 613 jbyte* position = value->byte_at_addr(start); 614 return UNICODE::as_utf8(position, len, buf, buflen); 615 } 616 } 617 618 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 619 assert(java_string->klass() == SystemDictionary::String_klass(), 620 "must be java_string"); 621 typeArrayOop value = java_lang_String::value(java_string); 622 int length = java_lang_String::length(java_string); 623 if (length != len) { 624 return false; 625 } 626 bool is_latin1 = java_lang_String::is_latin1(java_string); 627 if (!is_latin1) { 628 for (int i = 0; i < len; i++) { 629 if (value->char_at(i) != chars[i]) { 630 return false; 631 } 632 } 633 } else { 634 for (int i = 0; i < len; i++) { 635 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 636 return false; 637 } 638 } 639 } 640 return true; 641 } 642 643 bool java_lang_String::equals(oop str1, oop str2) { 644 assert(str1->klass() == SystemDictionary::String_klass(), 645 "must be java String"); 646 assert(str2->klass() == SystemDictionary::String_klass(), 647 "must be java String"); 648 typeArrayOop value1 = java_lang_String::value(str1); 649 int length1 = java_lang_String::length(str1); 650 bool is_latin1 = java_lang_String::is_latin1(str1); 651 typeArrayOop value2 = java_lang_String::value(str2); 652 int length2 = java_lang_String::length(str2); 653 bool is_latin2 = java_lang_String::is_latin1(str2); 654 655 if ((length1 != length2) || (is_latin1 != is_latin2)) { 656 // Strings of different size or with different 657 // coders are never equal. 658 return false; 659 } 660 int blength1 = value1->length(); 661 for (int i = 0; i < value1->length(); i++) { 662 if (value1->byte_at(i) != value2->byte_at(i)) { 663 return false; 664 } 665 } 666 return true; 667 } 668 669 void java_lang_String::print(oop java_string, outputStream* st) { 670 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 671 typeArrayOop value = java_lang_String::value(java_string); 672 673 if (value == NULL) { 674 // This can happen if, e.g., printing a String 675 // object before its initializer has been called 676 st->print("NULL"); 677 return; 678 } 679 680 int length = java_lang_String::length(java_string); 681 bool is_latin1 = java_lang_String::is_latin1(java_string); 682 683 st->print("\""); 684 for (int index = 0; index < length; index++) { 685 st->print("%c", (!is_latin1) ? value->char_at(index) : 686 ((jchar) value->byte_at(index)) & 0xff ); 687 } 688 st->print("\""); 689 } 690 691 692 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 693 assert(mirror.not_null() && fd->is_static(), "just checking"); 694 if (fd->has_initial_value()) { 695 BasicType t = fd->field_type(); 696 switch (t) { 697 case T_BYTE: 698 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 699 break; 700 case T_BOOLEAN: 701 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 702 break; 703 case T_CHAR: 704 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 705 break; 706 case T_SHORT: 707 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 708 break; 709 case T_INT: 710 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 711 break; 712 case T_FLOAT: 713 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 714 break; 715 case T_DOUBLE: 716 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 717 break; 718 case T_LONG: 719 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 720 break; 721 case T_OBJECT: 722 { 723 #ifdef ASSERT 724 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 725 assert(fd->signature() == sym, "just checking"); 726 #endif 727 oop string = fd->string_initial_value(CHECK); 728 mirror()->obj_field_put(fd->offset(), string); 729 } 730 break; 731 default: 732 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 733 "Illegal ConstantValue attribute in class file"); 734 } 735 } 736 } 737 738 739 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 740 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 741 742 // If the offset was read from the shared archive, it was fixed up already 743 if (!k->is_shared()) { 744 if (k->is_instance_klass()) { 745 // During bootstrap, java.lang.Class wasn't loaded so static field 746 // offsets were computed without the size added it. Go back and 747 // update all the static field offsets to included the size. 748 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 749 if (fs.access_flags().is_static()) { 750 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 751 fs.set_offset(real_offset); 752 } 753 } 754 } 755 } 756 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 757 } 758 759 void java_lang_Class::initialize_mirror_fields(Klass* k, 760 Handle mirror, 761 Handle protection_domain, 762 TRAPS) { 763 // Allocate a simple java object for a lock. 764 // This needs to be a java object because during class initialization 765 // it can be held across a java call. 766 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 767 set_init_lock(mirror(), r); 768 769 // Set protection domain also 770 set_protection_domain(mirror(), protection_domain()); 771 772 // Initialize static fields 773 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 774 } 775 776 // Set the java.lang.Module module field in the java_lang_Class mirror 777 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 778 if (module.is_null()) { 779 // During startup, the module may be NULL only if java.base has not been defined yet. 780 // Put the class on the fixup_module_list to patch later when the java.lang.Module 781 // for java.base is known. 782 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 783 784 bool javabase_was_defined = false; 785 { 786 MutexLocker m1(Module_lock, THREAD); 787 // Keep list of classes needing java.base module fixup 788 if (!ModuleEntryTable::javabase_defined()) { 789 if (fixup_module_field_list() == NULL) { 790 GrowableArray<Klass*>* list = 791 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 792 set_fixup_module_field_list(list); 793 } 794 k->class_loader_data()->inc_keep_alive(); 795 fixup_module_field_list()->push(k); 796 } else { 797 javabase_was_defined = true; 798 } 799 } 800 801 // If java.base was already defined then patch this particular class with java.base. 802 if (javabase_was_defined) { 803 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 804 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 805 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 806 Handle javabase_handle(THREAD, JNIHandles::resolve(javabase_entry->module())); 807 set_module(mirror(), javabase_handle()); 808 } 809 } else { 810 assert(Universe::is_module_initialized() || 811 (ModuleEntryTable::javabase_defined() && 812 (module() == JNIHandles::resolve(ModuleEntryTable::javabase_moduleEntry()->module()))), 813 "Incorrect java.lang.Module specification while creating mirror"); 814 set_module(mirror(), module()); 815 } 816 } 817 818 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 819 Handle module, Handle protection_domain, TRAPS) { 820 assert(k->java_mirror() == NULL, "should only assign mirror once"); 821 // Use this moment of initialization to cache modifier_flags also, 822 // to support Class.getModifiers(). Instance classes recalculate 823 // the cached flags after the class file is parsed, but before the 824 // class is put into the system dictionary. 825 int computed_modifiers = k->compute_modifier_flags(CHECK); 826 k->set_modifier_flags(computed_modifiers); 827 // Class_klass has to be loaded because it is used to allocate 828 // the mirror. 829 if (SystemDictionary::Class_klass_loaded()) { 830 // Allocate mirror (java.lang.Class instance) 831 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 832 Handle mirror(THREAD, mirror_oop); 833 834 // Setup indirection from mirror->klass 835 if (k != NULL) { 836 java_lang_Class::set_klass(mirror(), k); 837 } 838 839 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 840 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 841 842 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 843 844 // It might also have a component mirror. This mirror must already exist. 845 if (k->is_array_klass()) { 846 oop comp_mirror; 847 if (k->is_typeArray_klass()) { 848 BasicType type = TypeArrayKlass::cast(k)->element_type(); 849 comp_mirror = 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 = 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 set_array_klass(comp_mirror, k); 862 } else { 863 assert(k->is_instance_klass(), "Must be"); 864 865 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 866 if (HAS_PENDING_EXCEPTION) { 867 // If any of the fields throws an exception like OOM remove the klass field 868 // from the mirror so GC doesn't follow it after the klass has been deallocated. 869 // This mirror looks like a primitive type, which logically it is because it 870 // it represents no class. 871 java_lang_Class::set_klass(mirror(), NULL); 872 return; 873 } 874 } 875 876 // set the classLoader field in the java_lang_Class instance 877 assert(class_loader() == k->class_loader(), "should be same"); 878 set_class_loader(mirror(), class_loader()); 879 880 // set the module field in the java_lang_Class instance 881 set_mirror_module_field(k, mirror, module, THREAD); 882 883 // Setup indirection from klass->mirror last 884 // after any exceptions can happen during allocations. 885 if (k != NULL) { 886 k->set_java_mirror(mirror()); 887 } 888 } else { 889 if (fixup_mirror_list() == NULL) { 890 GrowableArray<Klass*>* list = 891 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 892 set_fixup_mirror_list(list); 893 } 894 fixup_mirror_list()->push(k); 895 } 896 } 897 898 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 899 assert(_module_offset != 0, "must have been computed already"); 900 java_lang_Class::set_module(k->java_mirror(), module()); 901 } 902 903 int java_lang_Class::oop_size(oop java_class) { 904 assert(_oop_size_offset != 0, "must be set"); 905 int size = java_class->int_field(_oop_size_offset); 906 assert(size > 0, "Oop size must be greater than zero, not %d", size); 907 return size; 908 } 909 910 void java_lang_Class::set_oop_size(oop java_class, int size) { 911 assert(_oop_size_offset != 0, "must be set"); 912 assert(size > 0, "Oop size must be greater than zero, not %d", size); 913 java_class->int_field_put(_oop_size_offset, size); 914 } 915 916 int java_lang_Class::static_oop_field_count(oop java_class) { 917 assert(_static_oop_field_count_offset != 0, "must be set"); 918 return java_class->int_field(_static_oop_field_count_offset); 919 } 920 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 921 assert(_static_oop_field_count_offset != 0, "must be set"); 922 java_class->int_field_put(_static_oop_field_count_offset, size); 923 } 924 925 oop java_lang_Class::protection_domain(oop java_class) { 926 assert(_protection_domain_offset != 0, "must be set"); 927 return java_class->obj_field(_protection_domain_offset); 928 } 929 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 930 assert(_protection_domain_offset != 0, "must be set"); 931 java_class->obj_field_put(_protection_domain_offset, pd); 932 } 933 934 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 935 assert(_component_mirror_offset != 0, "must be set"); 936 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 937 } 938 oop java_lang_Class::component_mirror(oop java_class) { 939 assert(_component_mirror_offset != 0, "must be set"); 940 return java_class->obj_field(_component_mirror_offset); 941 } 942 943 oop java_lang_Class::init_lock(oop java_class) { 944 assert(_init_lock_offset != 0, "must be set"); 945 return java_class->obj_field(_init_lock_offset); 946 } 947 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 948 assert(_init_lock_offset != 0, "must be set"); 949 java_class->obj_field_put(_init_lock_offset, init_lock); 950 } 951 952 objArrayOop java_lang_Class::signers(oop java_class) { 953 assert(_signers_offset != 0, "must be set"); 954 return (objArrayOop)java_class->obj_field(_signers_offset); 955 } 956 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 957 assert(_signers_offset != 0, "must be set"); 958 java_class->obj_field_put(_signers_offset, (oop)signers); 959 } 960 961 962 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 963 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 964 if (_class_loader_offset != 0) { 965 java_class->obj_field_put(_class_loader_offset, loader); 966 } 967 } 968 969 oop java_lang_Class::class_loader(oop java_class) { 970 assert(_class_loader_offset != 0, "must be set"); 971 return java_class->obj_field(_class_loader_offset); 972 } 973 974 oop java_lang_Class::module(oop java_class) { 975 assert(_module_offset != 0, "must be set"); 976 return java_class->obj_field(_module_offset); 977 } 978 979 void java_lang_Class::set_module(oop java_class, oop module) { 980 assert(_module_offset != 0, "must be set"); 981 java_class->obj_field_put(_module_offset, module); 982 } 983 984 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 985 // This should be improved by adding a field at the Java level or by 986 // introducing a new VM klass (see comment in ClassFileParser) 987 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 988 if (type != T_VOID) { 989 Klass* aklass = Universe::typeArrayKlassObj(type); 990 assert(aklass != NULL, "correct bootstrap"); 991 set_array_klass(java_class, aklass); 992 } 993 #ifdef ASSERT 994 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 995 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 996 #endif 997 return java_class; 998 } 999 1000 1001 Klass* java_lang_Class::as_Klass(oop java_class) { 1002 //%note memory_2 1003 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1004 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1005 assert(k == NULL || k->is_klass(), "type check"); 1006 return k; 1007 } 1008 1009 1010 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1011 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1012 java_class->metadata_field_put(_klass_offset, klass); 1013 } 1014 1015 1016 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1017 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1018 Symbol* name = NULL; 1019 bool is_instance = false; 1020 if (is_primitive(java_class)) { 1021 name = vmSymbols::type_signature(primitive_type(java_class)); 1022 } else { 1023 Klass* k = as_Klass(java_class); 1024 is_instance = k->is_instance_klass(); 1025 name = k->name(); 1026 } 1027 if (name == NULL) { 1028 st->print("<null>"); 1029 return; 1030 } 1031 if (is_instance) st->print("L"); 1032 st->write((char*) name->base(), (int) name->utf8_length()); 1033 if (is_instance) st->print(";"); 1034 } 1035 1036 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1037 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1038 Symbol* name; 1039 if (is_primitive(java_class)) { 1040 name = vmSymbols::type_signature(primitive_type(java_class)); 1041 // Because this can create a new symbol, the caller has to decrement 1042 // the refcount, so make adjustment here and below for symbols returned 1043 // that are not created or incremented due to a successful lookup. 1044 name->increment_refcount(); 1045 } else { 1046 Klass* k = as_Klass(java_class); 1047 if (!k->is_instance_klass()) { 1048 name = k->name(); 1049 name->increment_refcount(); 1050 } else { 1051 ResourceMark rm; 1052 const char* sigstr = k->signature_name(); 1053 int siglen = (int) strlen(sigstr); 1054 if (!intern_if_not_found) { 1055 name = SymbolTable::probe(sigstr, siglen); 1056 } else { 1057 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1058 } 1059 } 1060 } 1061 return name; 1062 } 1063 1064 // Returns the Java name for this Java mirror (Resource allocated) 1065 // See Klass::external_name(). 1066 // For primitive type Java mirrors, its type name is returned. 1067 const char* java_lang_Class::as_external_name(oop java_class) { 1068 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1069 const char* name = NULL; 1070 if (is_primitive(java_class)) { 1071 name = type2name(primitive_type(java_class)); 1072 } else { 1073 name = as_Klass(java_class)->external_name(); 1074 } 1075 if (name == NULL) { 1076 name = "<null>"; 1077 } 1078 return name; 1079 } 1080 1081 Klass* java_lang_Class::array_klass(oop java_class) { 1082 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1083 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1084 return k; 1085 } 1086 1087 1088 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 1089 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1090 java_class->metadata_field_put(_array_klass_offset, klass); 1091 } 1092 1093 1094 bool java_lang_Class::is_primitive(oop java_class) { 1095 // should assert: 1096 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1097 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1098 1099 #ifdef ASSERT 1100 if (is_primitive) { 1101 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1102 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1103 "Should be either the T_VOID primitive or a java primitive"); 1104 } 1105 #endif 1106 1107 return is_primitive; 1108 } 1109 1110 1111 BasicType java_lang_Class::primitive_type(oop java_class) { 1112 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1113 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1114 BasicType type = T_VOID; 1115 if (ak != NULL) { 1116 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1117 type = ArrayKlass::cast(ak)->element_type(); 1118 } else { 1119 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1120 } 1121 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1122 return type; 1123 } 1124 1125 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1126 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1127 if (is_primitive(java_class)) { 1128 if (reference_klass != NULL) 1129 (*reference_klass) = NULL; 1130 return primitive_type(java_class); 1131 } else { 1132 if (reference_klass != NULL) 1133 (*reference_klass) = as_Klass(java_class); 1134 return T_OBJECT; 1135 } 1136 } 1137 1138 1139 oop java_lang_Class::primitive_mirror(BasicType t) { 1140 oop mirror = Universe::java_mirror(t); 1141 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1142 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1143 return mirror; 1144 } 1145 1146 bool java_lang_Class::offsets_computed = false; 1147 int java_lang_Class::classRedefinedCount_offset = -1; 1148 1149 void java_lang_Class::compute_offsets() { 1150 assert(!offsets_computed, "offsets should be initialized only once"); 1151 offsets_computed = true; 1152 1153 Klass* k = SystemDictionary::Class_klass(); 1154 // The classRedefinedCount field is only present starting in 1.5, 1155 // so don't go fatal. 1156 compute_optional_offset(classRedefinedCount_offset, 1157 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 1158 1159 // Needs to be optional because the old build runs Queens during bootstrapping 1160 // and jdk8-9 doesn't have coordinated pushes yet. 1161 compute_optional_offset(_class_loader_offset, 1162 k, vmSymbols::classLoader_name(), 1163 vmSymbols::classloader_signature()); 1164 1165 compute_offset(_component_mirror_offset, 1166 k, vmSymbols::componentType_name(), 1167 vmSymbols::class_signature()); 1168 1169 compute_offset(_module_offset, 1170 k, vmSymbols::module_name(), 1171 vmSymbols::module_signature()); 1172 1173 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1174 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1175 // GC treats them the same. 1176 _init_lock_offset = _component_mirror_offset; 1177 1178 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1179 } 1180 1181 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1182 if (classRedefinedCount_offset == -1) { 1183 // If we don't have an offset for it then just return -1 as a marker. 1184 return -1; 1185 } 1186 1187 return the_class_mirror->int_field(classRedefinedCount_offset); 1188 } 1189 1190 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1191 if (classRedefinedCount_offset == -1) { 1192 // If we don't have an offset for it then nothing to set. 1193 return; 1194 } 1195 1196 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1197 } 1198 1199 1200 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1201 // platform thread structure, and a eetop offset which was used for thread 1202 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1203 // merged, so in the HotSpot VM we just use the eetop field for the thread 1204 // instead of the privateInfo_offset. 1205 // 1206 // Note: The stackSize field is only present starting in 1.4. 1207 1208 int java_lang_Thread::_name_offset = 0; 1209 int java_lang_Thread::_group_offset = 0; 1210 int java_lang_Thread::_contextClassLoader_offset = 0; 1211 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1212 int java_lang_Thread::_priority_offset = 0; 1213 int java_lang_Thread::_eetop_offset = 0; 1214 int java_lang_Thread::_daemon_offset = 0; 1215 int java_lang_Thread::_stillborn_offset = 0; 1216 int java_lang_Thread::_stackSize_offset = 0; 1217 int java_lang_Thread::_tid_offset = 0; 1218 int java_lang_Thread::_thread_status_offset = 0; 1219 int java_lang_Thread::_park_blocker_offset = 0; 1220 int java_lang_Thread::_park_event_offset = 0 ; 1221 1222 1223 void java_lang_Thread::compute_offsets() { 1224 assert(_group_offset == 0, "offsets should be initialized only once"); 1225 1226 Klass* k = SystemDictionary::Thread_klass(); 1227 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1228 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 1229 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 1230 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 1231 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 1232 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1233 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 1234 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 1235 // The stackSize field is only present starting in 1.4, so don't go fatal. 1236 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 1237 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 1238 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 1239 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 1240 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 1241 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 1242 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 1243 vmSymbols::long_signature()); 1244 } 1245 1246 1247 JavaThread* java_lang_Thread::thread(oop java_thread) { 1248 return (JavaThread*)java_thread->address_field(_eetop_offset); 1249 } 1250 1251 1252 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1253 java_thread->address_field_put(_eetop_offset, (address)thread); 1254 } 1255 1256 1257 oop java_lang_Thread::name(oop java_thread) { 1258 return java_thread->obj_field(_name_offset); 1259 } 1260 1261 1262 void java_lang_Thread::set_name(oop java_thread, oop name) { 1263 java_thread->obj_field_put(_name_offset, name); 1264 } 1265 1266 1267 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1268 return (ThreadPriority)java_thread->int_field(_priority_offset); 1269 } 1270 1271 1272 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1273 java_thread->int_field_put(_priority_offset, priority); 1274 } 1275 1276 1277 oop java_lang_Thread::threadGroup(oop java_thread) { 1278 return java_thread->obj_field(_group_offset); 1279 } 1280 1281 1282 bool java_lang_Thread::is_stillborn(oop java_thread) { 1283 return java_thread->bool_field(_stillborn_offset) != 0; 1284 } 1285 1286 1287 // We never have reason to turn the stillborn bit off 1288 void java_lang_Thread::set_stillborn(oop java_thread) { 1289 java_thread->bool_field_put(_stillborn_offset, true); 1290 } 1291 1292 1293 bool java_lang_Thread::is_alive(oop java_thread) { 1294 JavaThread* thr = java_lang_Thread::thread(java_thread); 1295 return (thr != NULL); 1296 } 1297 1298 1299 bool java_lang_Thread::is_daemon(oop java_thread) { 1300 return java_thread->bool_field(_daemon_offset) != 0; 1301 } 1302 1303 1304 void java_lang_Thread::set_daemon(oop java_thread) { 1305 java_thread->bool_field_put(_daemon_offset, true); 1306 } 1307 1308 oop java_lang_Thread::context_class_loader(oop java_thread) { 1309 return java_thread->obj_field(_contextClassLoader_offset); 1310 } 1311 1312 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1313 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1314 } 1315 1316 1317 jlong java_lang_Thread::stackSize(oop java_thread) { 1318 if (_stackSize_offset > 0) { 1319 return java_thread->long_field(_stackSize_offset); 1320 } else { 1321 return 0; 1322 } 1323 } 1324 1325 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1326 void java_lang_Thread::set_thread_status(oop java_thread, 1327 java_lang_Thread::ThreadStatus status) { 1328 // The threadStatus is only present starting in 1.5 1329 if (_thread_status_offset > 0) { 1330 java_thread->int_field_put(_thread_status_offset, status); 1331 } 1332 } 1333 1334 // Read thread status value from threadStatus field in java.lang.Thread java class. 1335 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1336 assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() || 1337 Thread::current()->is_VM_thread() || JavaThread::current()->thread_state() == _thread_in_vm, 1338 "Java Thread is not running in vm"); 1339 // The threadStatus is only present starting in 1.5 1340 if (_thread_status_offset > 0) { 1341 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1342 } else { 1343 // All we can easily figure out is if it is alive, but that is 1344 // enough info for a valid unknown status. 1345 // These aren't restricted to valid set ThreadStatus values, so 1346 // use JVMTI values and cast. 1347 JavaThread* thr = java_lang_Thread::thread(java_thread); 1348 if (thr == NULL) { 1349 // the thread hasn't run yet or is in the process of exiting 1350 return NEW; 1351 } 1352 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1353 } 1354 } 1355 1356 1357 jlong java_lang_Thread::thread_id(oop java_thread) { 1358 // The thread ID field is only present starting in 1.5 1359 if (_tid_offset > 0) { 1360 return java_thread->long_field(_tid_offset); 1361 } else { 1362 return 0; 1363 } 1364 } 1365 1366 oop java_lang_Thread::park_blocker(oop java_thread) { 1367 assert(JDK_Version::current().supports_thread_park_blocker() && 1368 _park_blocker_offset != 0, "Must support parkBlocker field"); 1369 1370 if (_park_blocker_offset > 0) { 1371 return java_thread->obj_field(_park_blocker_offset); 1372 } 1373 1374 return NULL; 1375 } 1376 1377 jlong java_lang_Thread::park_event(oop java_thread) { 1378 if (_park_event_offset > 0) { 1379 return java_thread->long_field(_park_event_offset); 1380 } 1381 return 0; 1382 } 1383 1384 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1385 if (_park_event_offset > 0) { 1386 java_thread->long_field_put(_park_event_offset, ptr); 1387 return true; 1388 } 1389 return false; 1390 } 1391 1392 1393 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1394 assert(_thread_status_offset != 0, "Must have thread status"); 1395 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1396 switch (status) { 1397 case NEW : return "NEW"; 1398 case RUNNABLE : return "RUNNABLE"; 1399 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1400 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1401 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1402 case PARKED : return "WAITING (parking)"; 1403 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1404 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1405 case TERMINATED : return "TERMINATED"; 1406 default : return "UNKNOWN"; 1407 }; 1408 } 1409 int java_lang_ThreadGroup::_parent_offset = 0; 1410 int java_lang_ThreadGroup::_name_offset = 0; 1411 int java_lang_ThreadGroup::_threads_offset = 0; 1412 int java_lang_ThreadGroup::_groups_offset = 0; 1413 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1414 int java_lang_ThreadGroup::_destroyed_offset = 0; 1415 int java_lang_ThreadGroup::_daemon_offset = 0; 1416 int java_lang_ThreadGroup::_nthreads_offset = 0; 1417 int java_lang_ThreadGroup::_ngroups_offset = 0; 1418 1419 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1420 assert(java_thread_group->is_oop(), "thread group must be oop"); 1421 return java_thread_group->obj_field(_parent_offset); 1422 } 1423 1424 // ("name as oop" accessor is not necessary) 1425 1426 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1427 oop name = java_thread_group->obj_field(_name_offset); 1428 // ThreadGroup.name can be null 1429 if (name != NULL) { 1430 return java_lang_String::as_utf8_string(name); 1431 } 1432 return NULL; 1433 } 1434 1435 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1436 assert(java_thread_group->is_oop(), "thread group must be oop"); 1437 return java_thread_group->int_field(_nthreads_offset); 1438 } 1439 1440 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1441 oop threads = java_thread_group->obj_field(_threads_offset); 1442 assert(threads != NULL, "threadgroups should have threads"); 1443 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1444 return objArrayOop(threads); 1445 } 1446 1447 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1448 assert(java_thread_group->is_oop(), "thread group must be oop"); 1449 return java_thread_group->int_field(_ngroups_offset); 1450 } 1451 1452 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1453 oop groups = java_thread_group->obj_field(_groups_offset); 1454 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1455 return objArrayOop(groups); 1456 } 1457 1458 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1459 assert(java_thread_group->is_oop(), "thread group must be oop"); 1460 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1461 } 1462 1463 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1464 assert(java_thread_group->is_oop(), "thread group must be oop"); 1465 return java_thread_group->bool_field(_destroyed_offset) != 0; 1466 } 1467 1468 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1469 assert(java_thread_group->is_oop(), "thread group must be oop"); 1470 return java_thread_group->bool_field(_daemon_offset) != 0; 1471 } 1472 1473 void java_lang_ThreadGroup::compute_offsets() { 1474 assert(_parent_offset == 0, "offsets should be initialized only once"); 1475 1476 Klass* k = SystemDictionary::ThreadGroup_klass(); 1477 1478 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1479 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1480 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1481 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1482 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1483 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1484 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1485 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1486 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1487 } 1488 1489 1490 void java_lang_Throwable::compute_offsets() { 1491 Klass* k = SystemDictionary::Throwable_klass(); 1492 compute_offset(depth_offset, k, vmSymbols::depth_name(), vmSymbols::int_signature()); 1493 } 1494 1495 oop java_lang_Throwable::unassigned_stacktrace() { 1496 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1497 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1498 if (UseCompressedOops) { 1499 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1500 } else { 1501 return oopDesc::load_decode_heap_oop((oop*)addr); 1502 } 1503 } 1504 1505 oop java_lang_Throwable::backtrace(oop throwable) { 1506 return throwable->obj_field_acquire(backtrace_offset); 1507 } 1508 1509 1510 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1511 throwable->release_obj_field_put(backtrace_offset, value); 1512 } 1513 1514 int java_lang_Throwable::depth(oop throwable) { 1515 return throwable->int_field(depth_offset); 1516 } 1517 1518 void java_lang_Throwable::set_depth(oop throwable, int value) { 1519 throwable->int_field_put(depth_offset, value); 1520 } 1521 1522 oop java_lang_Throwable::message(oop throwable) { 1523 return throwable->obj_field(detailMessage_offset); 1524 } 1525 1526 1527 // Return Symbol for detailed_message or NULL 1528 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1529 PRESERVE_EXCEPTION_MARK; // Keep original exception 1530 oop detailed_message = java_lang_Throwable::message(throwable); 1531 if (detailed_message != NULL) { 1532 return java_lang_String::as_symbol(detailed_message, THREAD); 1533 } 1534 return NULL; 1535 } 1536 1537 void java_lang_Throwable::set_message(oop throwable, oop value) { 1538 throwable->obj_field_put(detailMessage_offset, value); 1539 } 1540 1541 1542 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1543 throwable->obj_field_put(stackTrace_offset, st_element_array); 1544 } 1545 1546 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1547 set_stacktrace(throwable, NULL); 1548 } 1549 1550 1551 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1552 ResourceMark rm; 1553 Klass* k = throwable->klass(); 1554 assert(k != NULL, "just checking"); 1555 st->print("%s", k->external_name()); 1556 oop msg = message(throwable); 1557 if (msg != NULL) { 1558 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1559 } 1560 } 1561 1562 // After this many redefines, the stack trace is unreliable. 1563 const int MAX_VERSION = USHRT_MAX; 1564 1565 static inline bool version_matches(Method* method, int version) { 1566 assert(version < MAX_VERSION, "version is too big"); 1567 return method != NULL && (method->constants()->version() == version); 1568 } 1569 1570 1571 // This class provides a simple wrapper over the internal structure of 1572 // exception backtrace to insulate users of the backtrace from needing 1573 // to know what it looks like. 1574 class BacktraceBuilder: public StackObj { 1575 friend class BacktraceIterator; 1576 private: 1577 Handle _backtrace; 1578 objArrayOop _head; 1579 typeArrayOop _methods; 1580 typeArrayOop _bcis; 1581 objArrayOop _mirrors; 1582 typeArrayOop _names; // needed to insulate method name against redefinition 1583 int _index; 1584 NoSafepointVerifier _nsv; 1585 1586 enum { 1587 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1588 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1589 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1590 trace_names_offset = java_lang_Throwable::trace_names_offset, 1591 trace_next_offset = java_lang_Throwable::trace_next_offset, 1592 trace_size = java_lang_Throwable::trace_size, 1593 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1594 }; 1595 1596 // get info out of chunks 1597 static typeArrayOop get_methods(objArrayHandle chunk) { 1598 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1599 assert(methods != NULL, "method array should be initialized in backtrace"); 1600 return methods; 1601 } 1602 static typeArrayOop get_bcis(objArrayHandle chunk) { 1603 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1604 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1605 return bcis; 1606 } 1607 static objArrayOop get_mirrors(objArrayHandle chunk) { 1608 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1609 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1610 return mirrors; 1611 } 1612 static typeArrayOop get_names(objArrayHandle chunk) { 1613 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1614 assert(names != NULL, "names array should be initialized in backtrace"); 1615 return names; 1616 } 1617 1618 public: 1619 1620 // constructor for new backtrace 1621 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1622 expand(CHECK); 1623 _backtrace = Handle(THREAD, _head); 1624 _index = 0; 1625 } 1626 1627 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1628 _methods = get_methods(backtrace); 1629 _bcis = get_bcis(backtrace); 1630 _mirrors = get_mirrors(backtrace); 1631 _names = get_names(backtrace); 1632 assert(_methods->length() == _bcis->length() && 1633 _methods->length() == _mirrors->length() && 1634 _mirrors->length() == _names->length(), 1635 "method and source information arrays should match"); 1636 1637 // head is the preallocated backtrace 1638 _head = backtrace(); 1639 _backtrace = Handle(thread, _head); 1640 _index = 0; 1641 } 1642 1643 void expand(TRAPS) { 1644 objArrayHandle old_head(THREAD, _head); 1645 PauseNoSafepointVerifier pnsv(&_nsv); 1646 1647 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1648 objArrayHandle new_head(THREAD, head); 1649 1650 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1651 typeArrayHandle new_methods(THREAD, methods); 1652 1653 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1654 typeArrayHandle new_bcis(THREAD, bcis); 1655 1656 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1657 objArrayHandle new_mirrors(THREAD, mirrors); 1658 1659 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 1660 typeArrayHandle new_names(THREAD, names); 1661 1662 if (!old_head.is_null()) { 1663 old_head->obj_at_put(trace_next_offset, new_head()); 1664 } 1665 new_head->obj_at_put(trace_methods_offset, new_methods()); 1666 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1667 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1668 new_head->obj_at_put(trace_names_offset, new_names()); 1669 1670 _head = new_head(); 1671 _methods = new_methods(); 1672 _bcis = new_bcis(); 1673 _mirrors = new_mirrors(); 1674 _names = new_names(); 1675 _index = 0; 1676 } 1677 1678 oop backtrace() { 1679 return _backtrace(); 1680 } 1681 1682 inline void push(Method* method, int bci, TRAPS) { 1683 // Smear the -1 bci to 0 since the array only holds unsigned 1684 // shorts. The later line number lookup would just smear the -1 1685 // to a 0 even if it could be recorded. 1686 if (bci == SynchronizationEntryBCI) bci = 0; 1687 1688 if (_index >= trace_chunk_size) { 1689 methodHandle mhandle(THREAD, method); 1690 expand(CHECK); 1691 method = mhandle(); 1692 } 1693 1694 _methods->short_at_put(_index, method->orig_method_idnum()); 1695 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 1696 1697 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 1698 // klass owning the symbols alive so their refcounts aren't decremented. 1699 Symbol* name = method->name(); 1700 _names->symbol_at_put(_index, name); 1701 1702 // We need to save the mirrors in the backtrace to keep the class 1703 // from being unloaded while we still have this stack trace. 1704 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1705 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1706 _index++; 1707 } 1708 1709 }; 1710 1711 struct BacktraceElement : public StackObj { 1712 int _method_id; 1713 int _bci; 1714 int _version; 1715 Symbol* _name; 1716 Handle _mirror; 1717 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 1718 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 1719 }; 1720 1721 class BacktraceIterator : public StackObj { 1722 int _index; 1723 objArrayHandle _result; 1724 objArrayHandle _mirrors; 1725 typeArrayHandle _methods; 1726 typeArrayHandle _bcis; 1727 typeArrayHandle _names; 1728 1729 void init(objArrayHandle result, Thread* thread) { 1730 // Get method id, bci, version and mirror from chunk 1731 _result = result; 1732 if (_result.not_null()) { 1733 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 1734 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 1735 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 1736 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 1737 _index = 0; 1738 } 1739 } 1740 public: 1741 BacktraceIterator(objArrayHandle result, Thread* thread) { 1742 init(result, thread); 1743 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 1744 } 1745 1746 BacktraceElement next(Thread* thread) { 1747 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 1748 _methods->short_at(_index), 1749 Backtrace::version_at(_bcis->int_at(_index)), 1750 Backtrace::bci_at(_bcis->int_at(_index)), 1751 _names->symbol_at(_index)); 1752 _index++; 1753 1754 if (_index >= java_lang_Throwable::trace_chunk_size) { 1755 int next_offset = java_lang_Throwable::trace_next_offset; 1756 // Get next chunk 1757 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 1758 init(result, thread); 1759 } 1760 return e; 1761 } 1762 1763 bool repeat() { 1764 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 1765 } 1766 }; 1767 1768 1769 // Print stack trace element to resource allocated buffer 1770 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 1771 int version, int bci, Symbol* name) { 1772 ResourceMark rm; 1773 1774 // Get strings and string lengths 1775 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1776 const char* klass_name = holder->external_name(); 1777 int buf_len = (int)strlen(klass_name); 1778 1779 char* method_name = name->as_C_string(); 1780 buf_len += (int)strlen(method_name); 1781 1782 char* source_file_name = NULL; 1783 Symbol* source = Backtrace::get_source_file_name(holder, version); 1784 if (source != NULL) { 1785 source_file_name = source->as_C_string(); 1786 buf_len += (int)strlen(source_file_name); 1787 } 1788 1789 char *module_name = NULL, *module_version = NULL; 1790 ModuleEntry* module = holder->module(); 1791 if (module->is_named()) { 1792 module_name = module->name()->as_C_string(); 1793 buf_len += (int)strlen(module_name); 1794 if (module->version() != NULL) { 1795 module_version = module->version()->as_C_string(); 1796 buf_len += (int)strlen(module_version); 1797 } 1798 } 1799 1800 // Allocate temporary buffer with extra space for formatting and line number 1801 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1802 1803 // Print stack trace line in buffer 1804 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 1805 1806 // Print module information 1807 if (module_name != NULL) { 1808 if (module_version != NULL) { 1809 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 1810 } else { 1811 sprintf(buf + (int)strlen(buf), "%s/", module_name); 1812 } 1813 } 1814 1815 // The method can be NULL if the requested class version is gone 1816 Method* method = holder->method_with_orig_idnum(method_id, version); 1817 if (!version_matches(method, version)) { 1818 strcat(buf, "Redefined)"); 1819 } else { 1820 int line_number = Backtrace::get_line_number(method, bci); 1821 if (line_number == -2) { 1822 strcat(buf, "Native Method)"); 1823 } else { 1824 if (source_file_name != NULL && (line_number != -1)) { 1825 // Sourcename and linenumber 1826 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 1827 } else if (source_file_name != NULL) { 1828 // Just sourcename 1829 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 1830 } else { 1831 // Neither sourcename nor linenumber 1832 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 1833 } 1834 CompiledMethod* nm = method->code(); 1835 if (WizardMode && nm != NULL) { 1836 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1837 } 1838 } 1839 } 1840 1841 st->print_cr("%s", buf); 1842 } 1843 1844 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 1845 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 1846 int method_id = method->orig_method_idnum(); 1847 int version = method->constants()->version(); 1848 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 1849 } 1850 1851 /** 1852 * Print the throwable message and its stack trace plus all causes by walking the 1853 * cause chain. The output looks the same as of Throwable.printStackTrace(). 1854 */ 1855 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 1856 // First, print the message. 1857 print(throwable(), st); 1858 st->cr(); 1859 1860 // Now print the stack trace. 1861 Thread* THREAD = Thread::current(); 1862 while (throwable.not_null()) { 1863 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 1864 if (result.is_null()) { 1865 st->print_raw_cr("\t<<no stack trace available>>"); 1866 return; 1867 } 1868 BacktraceIterator iter(result, THREAD); 1869 1870 while (iter.repeat()) { 1871 BacktraceElement bte = iter.next(THREAD); 1872 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 1873 } 1874 { 1875 // Call getCause() which doesn't necessarily return the _cause field. 1876 EXCEPTION_MARK; 1877 JavaValue cause(T_OBJECT); 1878 JavaCalls::call_virtual(&cause, 1879 throwable, 1880 throwable->klass(), 1881 vmSymbols::getCause_name(), 1882 vmSymbols::void_throwable_signature(), 1883 THREAD); 1884 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1885 if (HAS_PENDING_EXCEPTION) { 1886 CLEAR_PENDING_EXCEPTION; 1887 throwable = Handle(); 1888 } else { 1889 throwable = Handle(THREAD, (oop) cause.get_jobject()); 1890 if (throwable.not_null()) { 1891 st->print("Caused by: "); 1892 print(throwable(), st); 1893 st->cr(); 1894 } 1895 } 1896 } 1897 } 1898 } 1899 1900 /** 1901 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 1902 */ 1903 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 1904 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 1905 JavaValue result(T_VOID); 1906 JavaCalls::call_virtual(&result, 1907 throwable, 1908 SystemDictionary::Throwable_klass(), 1909 vmSymbols::printStackTrace_name(), 1910 vmSymbols::void_method_signature(), 1911 THREAD); 1912 } 1913 1914 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 1915 if (!StackTraceInThrowable) return; 1916 ResourceMark rm(THREAD); 1917 1918 // Start out by clearing the backtrace for this object, in case the VM 1919 // runs out of memory while allocating the stack trace 1920 set_backtrace(throwable(), NULL); 1921 // Clear lazily constructed Java level stacktrace if refilling occurs 1922 // This is unnecessary in 1.7+ but harmless 1923 clear_stacktrace(throwable()); 1924 1925 int max_depth = MaxJavaStackTraceDepth; 1926 JavaThread* thread = (JavaThread*)THREAD; 1927 1928 BacktraceBuilder bt(CHECK); 1929 1930 // If there is no Java frame just return the method that was being called 1931 // with bci 0 1932 if (!thread->has_last_Java_frame()) { 1933 if (max_depth >= 1 && method() != NULL) { 1934 bt.push(method(), 0, CHECK); 1935 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 1936 set_depth(throwable(), 1); 1937 set_backtrace(throwable(), bt.backtrace()); 1938 } 1939 return; 1940 } 1941 1942 // Instead of using vframe directly, this version of fill_in_stack_trace 1943 // basically handles everything by hand. This significantly improved the 1944 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1945 // See bug 6333838 for more details. 1946 // The "ASSERT" here is to verify this method generates the exactly same stack 1947 // trace as utilizing vframe. 1948 #ifdef ASSERT 1949 vframeStream st(thread); 1950 methodHandle st_method(THREAD, st.method()); 1951 #endif 1952 int total_count = 0; 1953 RegisterMap map(thread, false); 1954 int decode_offset = 0; 1955 CompiledMethod* nm = NULL; 1956 bool skip_fillInStackTrace_check = false; 1957 bool skip_throwableInit_check = false; 1958 bool skip_hidden = !ShowHiddenFrames; 1959 1960 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1961 Method* method = NULL; 1962 int bci = 0; 1963 1964 // Compiled java method case. 1965 if (decode_offset != 0) { 1966 DebugInfoReadStream stream(nm, decode_offset); 1967 decode_offset = stream.read_int(); 1968 method = (Method*)nm->metadata_at(stream.read_int()); 1969 bci = stream.read_bci(); 1970 } else { 1971 if (fr.is_first_frame()) break; 1972 address pc = fr.pc(); 1973 if (fr.is_interpreted_frame()) { 1974 address bcp = fr.interpreter_frame_bcp(); 1975 method = fr.interpreter_frame_method(); 1976 bci = method->bci_from(bcp); 1977 fr = fr.sender(&map); 1978 } else { 1979 CodeBlob* cb = fr.cb(); 1980 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1981 // but non nmethod 1982 fr = fr.sender(&map); 1983 if (cb == NULL || !cb->is_compiled()) { 1984 continue; 1985 } 1986 nm = cb->as_compiled_method(); 1987 if (nm->method()->is_native()) { 1988 method = nm->method(); 1989 bci = 0; 1990 } else { 1991 PcDesc* pd = nm->pc_desc_at(pc); 1992 decode_offset = pd->scope_decode_offset(); 1993 // if decode_offset is not equal to 0, it will execute the 1994 // "compiled java method case" at the beginning of the loop. 1995 continue; 1996 } 1997 } 1998 } 1999 #ifdef ASSERT 2000 assert(st_method() == method && st.bci() == bci, 2001 "Wrong stack trace"); 2002 st.next(); 2003 // vframeStream::method isn't GC-safe so store off a copy 2004 // of the Method* in case we GC. 2005 if (!st.at_end()) { 2006 st_method = st.method(); 2007 } 2008 #endif 2009 2010 // the format of the stacktrace will be: 2011 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2012 // - 0 or more <init> methods for the exception class (skipped) 2013 // - rest of the stack 2014 2015 if (!skip_fillInStackTrace_check) { 2016 if (method->name() == vmSymbols::fillInStackTrace_name() && 2017 throwable->is_a(method->method_holder())) { 2018 continue; 2019 } 2020 else { 2021 skip_fillInStackTrace_check = true; // gone past them all 2022 } 2023 } 2024 if (!skip_throwableInit_check) { 2025 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2026 2027 // skip <init> methods of the exception class and superclasses 2028 // This is simlar to classic VM. 2029 if (method->name() == vmSymbols::object_initializer_name() && 2030 throwable->is_a(method->method_holder())) { 2031 continue; 2032 } else { 2033 // there are none or we've seen them all - either way stop checking 2034 skip_throwableInit_check = true; 2035 } 2036 } 2037 if (method->is_hidden()) { 2038 if (skip_hidden) continue; 2039 } 2040 bt.push(method, bci, CHECK); 2041 total_count++; 2042 } 2043 2044 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2045 2046 // Put completed stack trace into throwable object 2047 set_backtrace(throwable(), bt.backtrace()); 2048 set_depth(throwable(), total_count); 2049 } 2050 2051 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2052 // No-op if stack trace is disabled 2053 if (!StackTraceInThrowable) { 2054 return; 2055 } 2056 2057 // Disable stack traces for some preallocated out of memory errors 2058 if (!Universe::should_fill_in_stack_trace(throwable)) { 2059 return; 2060 } 2061 2062 PRESERVE_EXCEPTION_MARK; 2063 2064 JavaThread* thread = JavaThread::active(); 2065 fill_in_stack_trace(throwable, method, thread); 2066 // ignore exceptions thrown during stack trace filling 2067 CLEAR_PENDING_EXCEPTION; 2068 } 2069 2070 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2071 // Allocate stack trace - backtrace is created but not filled in 2072 2073 // No-op if stack trace is disabled 2074 if (!StackTraceInThrowable) return; 2075 BacktraceBuilder bt(CHECK); // creates a backtrace 2076 set_backtrace(throwable(), bt.backtrace()); 2077 } 2078 2079 2080 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2081 // Fill in stack trace into preallocated backtrace (no GC) 2082 2083 // No-op if stack trace is disabled 2084 if (!StackTraceInThrowable) return; 2085 2086 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2087 2088 JavaThread* THREAD = JavaThread::current(); 2089 2090 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2091 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2092 2093 ResourceMark rm(THREAD); 2094 vframeStream st(THREAD); 2095 2096 BacktraceBuilder bt(THREAD, backtrace); 2097 2098 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2099 // methods as preallocated errors aren't created by "java" code. 2100 2101 // fill in as much stack trace as possible 2102 int chunk_count = 0; 2103 for (;!st.at_end(); st.next()) { 2104 bt.push(st.method(), st.bci(), CHECK); 2105 chunk_count++; 2106 2107 // Bail-out for deep stacks 2108 if (chunk_count >= trace_chunk_size) break; 2109 } 2110 set_depth(throwable(), chunk_count); 2111 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2112 2113 // We support the Throwable immutability protocol defined for Java 7. 2114 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2115 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2116 } 2117 2118 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2119 objArrayHandle stack_trace_array_h, TRAPS) { 2120 2121 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2122 THROW(vmSymbols::java_lang_NullPointerException()); 2123 } 2124 2125 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2126 2127 if (stack_trace_array_h->length() != depth(throwable())) { 2128 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2129 } 2130 2131 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2132 BacktraceIterator iter(result, THREAD); 2133 2134 int index = 0; 2135 while (iter.repeat()) { 2136 BacktraceElement bte = iter.next(THREAD); 2137 2138 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2139 2140 if (stack_trace_element.is_null()) { 2141 THROW(vmSymbols::java_lang_NullPointerException()); 2142 } 2143 2144 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2145 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2146 2147 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2148 method, 2149 bte._version, 2150 bte._bci, 2151 bte._name, CHECK); 2152 } 2153 } 2154 2155 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2156 // Allocate java.lang.StackTraceElement instance 2157 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2158 assert(k != NULL, "must be loaded in 1.4+"); 2159 if (k->should_be_initialized()) { 2160 k->initialize(CHECK_0); 2161 } 2162 2163 Handle element = k->allocate_instance_handle(CHECK_0); 2164 2165 int version = method->constants()->version(); 2166 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2167 return element(); 2168 } 2169 2170 void java_lang_StackTraceElement::fill_in(Handle element, 2171 InstanceKlass* holder, const methodHandle& method, 2172 int version, int bci, Symbol* name, TRAPS) { 2173 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2174 2175 // Fill in class name 2176 ResourceMark rm(THREAD); 2177 const char* str = holder->external_name(); 2178 oop classname = StringTable::intern((char*) str, CHECK); 2179 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2180 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2181 2182 oop loader = holder->class_loader(); 2183 if (loader != NULL) { 2184 oop loader_name = java_lang_ClassLoader::name(loader); 2185 if (loader_name != NULL) 2186 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2187 } 2188 2189 // Fill in method name 2190 oop methodname = StringTable::intern(name, CHECK); 2191 java_lang_StackTraceElement::set_methodName(element(), methodname); 2192 2193 // Fill in module name and version 2194 ModuleEntry* module = holder->module(); 2195 if (module->is_named()) { 2196 oop module_name = StringTable::intern(module->name(), CHECK); 2197 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2198 oop module_version; 2199 if (module->version() != NULL) { 2200 module_version = StringTable::intern(module->version(), CHECK); 2201 } else { 2202 module_version = NULL; 2203 } 2204 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2205 } 2206 2207 if (method() == NULL || !version_matches(method(), version)) { 2208 // The method was redefined, accurate line number information isn't available 2209 java_lang_StackTraceElement::set_fileName(element(), NULL); 2210 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2211 } else { 2212 // Fill in source file name and line number. 2213 Symbol* source = Backtrace::get_source_file_name(holder, version); 2214 if (ShowHiddenFrames && source == NULL) 2215 source = vmSymbols::unknown_class_name(); 2216 oop filename = StringTable::intern(source, CHECK); 2217 java_lang_StackTraceElement::set_fileName(element(), filename); 2218 2219 int line_number = Backtrace::get_line_number(method, bci); 2220 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2221 } 2222 } 2223 2224 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2225 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2226 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2227 // we should expand MemberName::name when Throwable uses StackTrace 2228 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2229 return method; 2230 } 2231 2232 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2233 // set Method* or mid/cpref 2234 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2235 InstanceKlass* ik = method->method_holder(); 2236 CallInfo info(method(), ik, CHECK); 2237 MethodHandles::init_method_MemberName(mname, info); 2238 // set bci 2239 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2240 // method may be redefined; store the version 2241 int version = method->constants()->version(); 2242 assert((jushort)version == version, "version should be short"); 2243 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2244 } 2245 2246 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2247 ResourceMark rm(THREAD); 2248 Handle k (THREAD, stackFrame->obj_field(_declaringClass_offset)); 2249 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k())); 2250 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2251 2252 short version = stackFrame->short_field(_version_offset); 2253 short bci = stackFrame->short_field(_bci_offset); 2254 Symbol* name = method->name(); 2255 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2256 } 2257 2258 void java_lang_StackFrameInfo::compute_offsets() { 2259 Klass* k = SystemDictionary::StackFrameInfo_klass(); 2260 compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2261 compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2262 compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::short_signature()); 2263 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2264 } 2265 2266 void java_lang_LiveStackFrameInfo::compute_offsets() { 2267 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2268 compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2269 compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2270 compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2271 compute_offset(_mode_offset, k, vmSymbols::mode_name(), vmSymbols::int_signature()); 2272 } 2273 2274 void java_lang_reflect_AccessibleObject::compute_offsets() { 2275 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2276 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2277 } 2278 2279 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2281 return (jboolean) reflect->bool_field(override_offset); 2282 } 2283 2284 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 reflect->bool_field_put(override_offset, (int) value); 2287 } 2288 2289 void java_lang_reflect_Method::compute_offsets() { 2290 Klass* k = SystemDictionary::reflect_Method_klass(); 2291 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2292 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2293 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2294 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2295 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2296 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2297 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2298 // The generic signature and annotations fields are only present in 1.5 2299 signature_offset = -1; 2300 annotations_offset = -1; 2301 parameter_annotations_offset = -1; 2302 annotation_default_offset = -1; 2303 type_annotations_offset = -1; 2304 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2305 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2306 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2307 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2308 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2309 } 2310 2311 Handle java_lang_reflect_Method::create(TRAPS) { 2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2313 Klass* klass = SystemDictionary::reflect_Method_klass(); 2314 // This class is eagerly initialized during VM initialization, since we keep a refence 2315 // to one of the methods 2316 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2317 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2318 } 2319 2320 oop java_lang_reflect_Method::clazz(oop reflect) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return reflect->obj_field(clazz_offset); 2323 } 2324 2325 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 reflect->obj_field_put(clazz_offset, value); 2328 } 2329 2330 int java_lang_reflect_Method::slot(oop reflect) { 2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2332 return reflect->int_field(slot_offset); 2333 } 2334 2335 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2337 reflect->int_field_put(slot_offset, value); 2338 } 2339 2340 oop java_lang_reflect_Method::name(oop method) { 2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2342 return method->obj_field(name_offset); 2343 } 2344 2345 void java_lang_reflect_Method::set_name(oop method, oop value) { 2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2347 method->obj_field_put(name_offset, value); 2348 } 2349 2350 oop java_lang_reflect_Method::return_type(oop method) { 2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2352 return method->obj_field(returnType_offset); 2353 } 2354 2355 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2357 method->obj_field_put(returnType_offset, value); 2358 } 2359 2360 oop java_lang_reflect_Method::parameter_types(oop method) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 return method->obj_field(parameterTypes_offset); 2363 } 2364 2365 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2367 method->obj_field_put(parameterTypes_offset, value); 2368 } 2369 2370 oop java_lang_reflect_Method::exception_types(oop method) { 2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2372 return method->obj_field(exceptionTypes_offset); 2373 } 2374 2375 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2377 method->obj_field_put(exceptionTypes_offset, value); 2378 } 2379 2380 int java_lang_reflect_Method::modifiers(oop method) { 2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2382 return method->int_field(modifiers_offset); 2383 } 2384 2385 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2387 method->int_field_put(modifiers_offset, value); 2388 } 2389 2390 bool java_lang_reflect_Method::has_signature_field() { 2391 return (signature_offset >= 0); 2392 } 2393 2394 oop java_lang_reflect_Method::signature(oop method) { 2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2396 assert(has_signature_field(), "signature field must be present"); 2397 return method->obj_field(signature_offset); 2398 } 2399 2400 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2402 assert(has_signature_field(), "signature field must be present"); 2403 method->obj_field_put(signature_offset, value); 2404 } 2405 2406 bool java_lang_reflect_Method::has_annotations_field() { 2407 return (annotations_offset >= 0); 2408 } 2409 2410 oop java_lang_reflect_Method::annotations(oop method) { 2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2412 assert(has_annotations_field(), "annotations field must be present"); 2413 return method->obj_field(annotations_offset); 2414 } 2415 2416 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2417 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2418 assert(has_annotations_field(), "annotations field must be present"); 2419 method->obj_field_put(annotations_offset, value); 2420 } 2421 2422 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2423 return (parameter_annotations_offset >= 0); 2424 } 2425 2426 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2428 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2429 return method->obj_field(parameter_annotations_offset); 2430 } 2431 2432 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2434 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2435 method->obj_field_put(parameter_annotations_offset, value); 2436 } 2437 2438 bool java_lang_reflect_Method::has_annotation_default_field() { 2439 return (annotation_default_offset >= 0); 2440 } 2441 2442 oop java_lang_reflect_Method::annotation_default(oop method) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 assert(has_annotation_default_field(), "annotation default field must be present"); 2445 return method->obj_field(annotation_default_offset); 2446 } 2447 2448 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2450 assert(has_annotation_default_field(), "annotation default field must be present"); 2451 method->obj_field_put(annotation_default_offset, value); 2452 } 2453 2454 bool java_lang_reflect_Method::has_type_annotations_field() { 2455 return (type_annotations_offset >= 0); 2456 } 2457 2458 oop java_lang_reflect_Method::type_annotations(oop method) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 assert(has_type_annotations_field(), "type_annotations field must be present"); 2461 return method->obj_field(type_annotations_offset); 2462 } 2463 2464 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2466 assert(has_type_annotations_field(), "type_annotations field must be present"); 2467 method->obj_field_put(type_annotations_offset, value); 2468 } 2469 2470 void java_lang_reflect_Constructor::compute_offsets() { 2471 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2472 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2473 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2474 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2475 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2476 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2477 // The generic signature and annotations fields are only present in 1.5 2478 signature_offset = -1; 2479 annotations_offset = -1; 2480 parameter_annotations_offset = -1; 2481 type_annotations_offset = -1; 2482 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2483 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2484 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2485 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2486 } 2487 2488 Handle java_lang_reflect_Constructor::create(TRAPS) { 2489 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2490 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2491 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2492 InstanceKlass* ik = InstanceKlass::cast(k); 2493 // Ensure it is initialized 2494 ik->initialize(CHECK_NH); 2495 return ik->allocate_instance_handle(THREAD); 2496 } 2497 2498 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2500 return reflect->obj_field(clazz_offset); 2501 } 2502 2503 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2505 reflect->obj_field_put(clazz_offset, value); 2506 } 2507 2508 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2509 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2510 return constructor->obj_field(parameterTypes_offset); 2511 } 2512 2513 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2514 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2515 constructor->obj_field_put(parameterTypes_offset, value); 2516 } 2517 2518 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2519 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2520 return constructor->obj_field(exceptionTypes_offset); 2521 } 2522 2523 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2524 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2525 constructor->obj_field_put(exceptionTypes_offset, value); 2526 } 2527 2528 int java_lang_reflect_Constructor::slot(oop reflect) { 2529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2530 return reflect->int_field(slot_offset); 2531 } 2532 2533 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2534 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2535 reflect->int_field_put(slot_offset, value); 2536 } 2537 2538 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2539 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2540 return constructor->int_field(modifiers_offset); 2541 } 2542 2543 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2544 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2545 constructor->int_field_put(modifiers_offset, value); 2546 } 2547 2548 bool java_lang_reflect_Constructor::has_signature_field() { 2549 return (signature_offset >= 0); 2550 } 2551 2552 oop java_lang_reflect_Constructor::signature(oop constructor) { 2553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2554 assert(has_signature_field(), "signature field must be present"); 2555 return constructor->obj_field(signature_offset); 2556 } 2557 2558 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2559 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2560 assert(has_signature_field(), "signature field must be present"); 2561 constructor->obj_field_put(signature_offset, value); 2562 } 2563 2564 bool java_lang_reflect_Constructor::has_annotations_field() { 2565 return (annotations_offset >= 0); 2566 } 2567 2568 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2569 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2570 assert(has_annotations_field(), "annotations field must be present"); 2571 return constructor->obj_field(annotations_offset); 2572 } 2573 2574 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2576 assert(has_annotations_field(), "annotations field must be present"); 2577 constructor->obj_field_put(annotations_offset, value); 2578 } 2579 2580 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2581 return (parameter_annotations_offset >= 0); 2582 } 2583 2584 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2586 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2587 return method->obj_field(parameter_annotations_offset); 2588 } 2589 2590 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2591 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2592 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2593 method->obj_field_put(parameter_annotations_offset, value); 2594 } 2595 2596 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2597 return (type_annotations_offset >= 0); 2598 } 2599 2600 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2601 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2602 assert(has_type_annotations_field(), "type_annotations field must be present"); 2603 return constructor->obj_field(type_annotations_offset); 2604 } 2605 2606 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2607 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2608 assert(has_type_annotations_field(), "type_annotations field must be present"); 2609 constructor->obj_field_put(type_annotations_offset, value); 2610 } 2611 2612 void java_lang_reflect_Field::compute_offsets() { 2613 Klass* k = SystemDictionary::reflect_Field_klass(); 2614 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2615 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2616 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2617 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2618 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2619 // The generic signature and annotations fields are only present in 1.5 2620 signature_offset = -1; 2621 annotations_offset = -1; 2622 type_annotations_offset = -1; 2623 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2624 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2625 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2626 } 2627 2628 Handle java_lang_reflect_Field::create(TRAPS) { 2629 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2630 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2631 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2632 InstanceKlass* ik = InstanceKlass::cast(k); 2633 // Ensure it is initialized 2634 ik->initialize(CHECK_NH); 2635 return ik->allocate_instance_handle(THREAD); 2636 } 2637 2638 oop java_lang_reflect_Field::clazz(oop reflect) { 2639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2640 return reflect->obj_field(clazz_offset); 2641 } 2642 2643 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2645 reflect->obj_field_put(clazz_offset, value); 2646 } 2647 2648 oop java_lang_reflect_Field::name(oop field) { 2649 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2650 return field->obj_field(name_offset); 2651 } 2652 2653 void java_lang_reflect_Field::set_name(oop field, oop value) { 2654 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2655 field->obj_field_put(name_offset, value); 2656 } 2657 2658 oop java_lang_reflect_Field::type(oop field) { 2659 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2660 return field->obj_field(type_offset); 2661 } 2662 2663 void java_lang_reflect_Field::set_type(oop field, oop value) { 2664 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2665 field->obj_field_put(type_offset, value); 2666 } 2667 2668 int java_lang_reflect_Field::slot(oop reflect) { 2669 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2670 return reflect->int_field(slot_offset); 2671 } 2672 2673 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2674 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2675 reflect->int_field_put(slot_offset, value); 2676 } 2677 2678 int java_lang_reflect_Field::modifiers(oop field) { 2679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2680 return field->int_field(modifiers_offset); 2681 } 2682 2683 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2684 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2685 field->int_field_put(modifiers_offset, value); 2686 } 2687 2688 bool java_lang_reflect_Field::has_signature_field() { 2689 return (signature_offset >= 0); 2690 } 2691 2692 oop java_lang_reflect_Field::signature(oop field) { 2693 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2694 assert(has_signature_field(), "signature field must be present"); 2695 return field->obj_field(signature_offset); 2696 } 2697 2698 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2699 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2700 assert(has_signature_field(), "signature field must be present"); 2701 field->obj_field_put(signature_offset, value); 2702 } 2703 2704 bool java_lang_reflect_Field::has_annotations_field() { 2705 return (annotations_offset >= 0); 2706 } 2707 2708 oop java_lang_reflect_Field::annotations(oop field) { 2709 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2710 assert(has_annotations_field(), "annotations field must be present"); 2711 return field->obj_field(annotations_offset); 2712 } 2713 2714 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2716 assert(has_annotations_field(), "annotations field must be present"); 2717 field->obj_field_put(annotations_offset, value); 2718 } 2719 2720 bool java_lang_reflect_Field::has_type_annotations_field() { 2721 return (type_annotations_offset >= 0); 2722 } 2723 2724 oop java_lang_reflect_Field::type_annotations(oop field) { 2725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2726 assert(has_type_annotations_field(), "type_annotations field must be present"); 2727 return field->obj_field(type_annotations_offset); 2728 } 2729 2730 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2732 assert(has_type_annotations_field(), "type_annotations field must be present"); 2733 field->obj_field_put(type_annotations_offset, value); 2734 } 2735 2736 void reflect_ConstantPool::compute_offsets() { 2737 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2738 // This null test can be removed post beta 2739 if (k != NULL) { 2740 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2741 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2742 } 2743 } 2744 2745 void java_lang_reflect_Parameter::compute_offsets() { 2746 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2747 if(NULL != k) { 2748 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2749 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2750 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2751 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2752 } 2753 } 2754 2755 Handle java_lang_reflect_Parameter::create(TRAPS) { 2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2757 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2758 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2759 InstanceKlass* ik = InstanceKlass::cast(k); 2760 // Ensure it is initialized 2761 ik->initialize(CHECK_NH); 2762 return ik->allocate_instance_handle(THREAD); 2763 } 2764 2765 oop java_lang_reflect_Parameter::name(oop param) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 return param->obj_field(name_offset); 2768 } 2769 2770 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 param->obj_field_put(name_offset, value); 2773 } 2774 2775 int java_lang_reflect_Parameter::modifiers(oop param) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 return param->int_field(modifiers_offset); 2778 } 2779 2780 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 param->int_field_put(modifiers_offset, value); 2783 } 2784 2785 int java_lang_reflect_Parameter::index(oop param) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 return param->int_field(index_offset); 2788 } 2789 2790 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 param->int_field_put(index_offset, value); 2793 } 2794 2795 oop java_lang_reflect_Parameter::executable(oop param) { 2796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2797 return param->obj_field(executable_offset); 2798 } 2799 2800 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2801 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2802 param->obj_field_put(executable_offset, value); 2803 } 2804 2805 2806 int java_lang_Module::loader_offset; 2807 int java_lang_Module::name_offset; 2808 int java_lang_Module::_module_entry_offset = -1; 2809 2810 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 2811 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2812 2813 Symbol* name = vmSymbols::java_lang_Module(); 2814 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2815 InstanceKlass* ik = InstanceKlass::cast(k); 2816 Handle jlmh = ik->allocate_instance_handle(CHECK_NH); 2817 JavaValue result(T_VOID); 2818 JavaCalls::call_special(&result, jlmh, ik, 2819 vmSymbols::object_initializer_name(), 2820 vmSymbols::java_lang_module_init_signature(), 2821 loader, module_name, CHECK_NH); 2822 return jlmh; 2823 } 2824 2825 void java_lang_Module::compute_offsets() { 2826 Klass* k = SystemDictionary::Module_klass(); 2827 if(NULL != k) { 2828 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature()); 2829 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2830 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2831 } 2832 } 2833 2834 2835 oop java_lang_Module::loader(oop module) { 2836 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2837 return module->obj_field(loader_offset); 2838 } 2839 2840 void java_lang_Module::set_loader(oop module, oop value) { 2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2842 module->obj_field_put(loader_offset, value); 2843 } 2844 2845 oop java_lang_Module::name(oop module) { 2846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2847 return module->obj_field(name_offset); 2848 } 2849 2850 void java_lang_Module::set_name(oop module, oop value) { 2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2852 module->obj_field_put(name_offset, value); 2853 } 2854 2855 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) { 2856 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2857 assert(module != NULL, "module can't be null"); 2858 assert(module->is_oop(), "module must be oop"); 2859 2860 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 2861 if (module_entry == NULL) { 2862 // If the inject field containing the ModuleEntry* is null then return the 2863 // class loader's unnamed module. 2864 oop loader = java_lang_Module::loader(module); 2865 Handle h_loader = Handle(THREAD, loader); 2866 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL); 2867 return loader_cld->unnamed_module(); 2868 } 2869 return module_entry; 2870 } 2871 2872 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 2873 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 2874 assert(module != NULL, "module can't be null"); 2875 assert(module->is_oop(), "module must be oop"); 2876 module->address_field_put(_module_entry_offset, (address)module_entry); 2877 } 2878 2879 Handle reflect_ConstantPool::create(TRAPS) { 2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2881 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 2882 // Ensure it is initialized 2883 k->initialize(CHECK_NH); 2884 return k->allocate_instance_handle(THREAD); 2885 } 2886 2887 2888 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2890 oop mirror = value->pool_holder()->java_mirror(); 2891 // Save the mirror to get back the constant pool. 2892 reflect->obj_field_put(_oop_offset, mirror); 2893 } 2894 2895 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2897 2898 oop mirror = reflect->obj_field(_oop_offset); 2899 Klass* k = java_lang_Class::as_Klass(mirror); 2900 assert(k->is_instance_klass(), "Must be"); 2901 2902 // Get the constant pool back from the klass. Since class redefinition 2903 // merges the new constant pool into the old, this is essentially the 2904 // same constant pool as the original. If constant pool merging is 2905 // no longer done in the future, this will have to change to save 2906 // the original. 2907 return InstanceKlass::cast(k)->constants(); 2908 } 2909 2910 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2911 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2912 // This null test can be removed post beta 2913 if (k != NULL) { 2914 compute_offset(_base_offset, k, 2915 vmSymbols::base_name(), vmSymbols::object_signature()); 2916 } 2917 } 2918 2919 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2920 Klass* k = SystemDictionary::box_klass(type); 2921 if (k == NULL) return NULL; 2922 InstanceKlass* ik = InstanceKlass::cast(k); 2923 if (!ik->is_initialized()) ik->initialize(CHECK_0); 2924 return ik->allocate_instance(THREAD); 2925 } 2926 2927 2928 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2929 oop box = initialize_and_allocate(type, CHECK_0); 2930 if (box == NULL) return NULL; 2931 switch (type) { 2932 case T_BOOLEAN: 2933 box->bool_field_put(value_offset, value->z); 2934 break; 2935 case T_CHAR: 2936 box->char_field_put(value_offset, value->c); 2937 break; 2938 case T_FLOAT: 2939 box->float_field_put(value_offset, value->f); 2940 break; 2941 case T_DOUBLE: 2942 box->double_field_put(long_value_offset, value->d); 2943 break; 2944 case T_BYTE: 2945 box->byte_field_put(value_offset, value->b); 2946 break; 2947 case T_SHORT: 2948 box->short_field_put(value_offset, value->s); 2949 break; 2950 case T_INT: 2951 box->int_field_put(value_offset, value->i); 2952 break; 2953 case T_LONG: 2954 box->long_field_put(long_value_offset, value->j); 2955 break; 2956 default: 2957 return NULL; 2958 } 2959 return box; 2960 } 2961 2962 2963 BasicType java_lang_boxing_object::basic_type(oop box) { 2964 if (box == NULL) return T_ILLEGAL; 2965 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2966 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2967 return T_ILLEGAL; 2968 return type; 2969 } 2970 2971 2972 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2973 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2974 switch (type) { 2975 case T_BOOLEAN: 2976 value->z = box->bool_field(value_offset); 2977 break; 2978 case T_CHAR: 2979 value->c = box->char_field(value_offset); 2980 break; 2981 case T_FLOAT: 2982 value->f = box->float_field(value_offset); 2983 break; 2984 case T_DOUBLE: 2985 value->d = box->double_field(long_value_offset); 2986 break; 2987 case T_BYTE: 2988 value->b = box->byte_field(value_offset); 2989 break; 2990 case T_SHORT: 2991 value->s = box->short_field(value_offset); 2992 break; 2993 case T_INT: 2994 value->i = box->int_field(value_offset); 2995 break; 2996 case T_LONG: 2997 value->j = box->long_field(long_value_offset); 2998 break; 2999 default: 3000 return T_ILLEGAL; 3001 } // end switch 3002 return type; 3003 } 3004 3005 3006 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3007 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3008 switch (type) { 3009 case T_BOOLEAN: 3010 box->bool_field_put(value_offset, value->z); 3011 break; 3012 case T_CHAR: 3013 box->char_field_put(value_offset, value->c); 3014 break; 3015 case T_FLOAT: 3016 box->float_field_put(value_offset, value->f); 3017 break; 3018 case T_DOUBLE: 3019 box->double_field_put(long_value_offset, value->d); 3020 break; 3021 case T_BYTE: 3022 box->byte_field_put(value_offset, value->b); 3023 break; 3024 case T_SHORT: 3025 box->short_field_put(value_offset, value->s); 3026 break; 3027 case T_INT: 3028 box->int_field_put(value_offset, value->i); 3029 break; 3030 case T_LONG: 3031 box->long_field_put(long_value_offset, value->j); 3032 break; 3033 default: 3034 return T_ILLEGAL; 3035 } // end switch 3036 return type; 3037 } 3038 3039 3040 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3041 switch (type) { 3042 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3043 case T_CHAR: st->print("%d", value->c); break; 3044 case T_BYTE: st->print("%d", value->b); break; 3045 case T_SHORT: st->print("%d", value->s); break; 3046 case T_INT: st->print("%d", value->i); break; 3047 case T_LONG: st->print(INT64_FORMAT, value->j); break; 3048 case T_FLOAT: st->print("%f", value->f); break; 3049 case T_DOUBLE: st->print("%lf", value->d); break; 3050 default: st->print("type %d?", type); break; 3051 } 3052 } 3053 3054 // Support for java_lang_ref_SoftReference 3055 3056 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3057 return ref->long_field(timestamp_offset); 3058 } 3059 3060 jlong java_lang_ref_SoftReference::clock() { 3061 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3062 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3063 return *offset; 3064 } 3065 3066 void java_lang_ref_SoftReference::set_clock(jlong value) { 3067 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3068 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 3069 *offset = value; 3070 } 3071 3072 // Support for java_lang_invoke_DirectMethodHandle 3073 3074 int java_lang_invoke_DirectMethodHandle::_member_offset; 3075 3076 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3077 oop member_name = NULL; 3078 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 3079 assert(is_dmh, "a DirectMethodHandle oop is expected"); 3080 if (is_dmh) { 3081 member_name = dmh->obj_field(member_offset_in_bytes()); 3082 } 3083 return member_name; 3084 } 3085 3086 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3087 Klass* k = SystemDictionary::DirectMethodHandle_klass(); 3088 if (k != NULL) { 3089 compute_offset(_member_offset, k, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3090 } 3091 } 3092 3093 // Support for java_lang_invoke_MethodHandle 3094 3095 int java_lang_invoke_MethodHandle::_type_offset; 3096 int java_lang_invoke_MethodHandle::_form_offset; 3097 3098 int java_lang_invoke_MemberName::_clazz_offset; 3099 int java_lang_invoke_MemberName::_name_offset; 3100 int java_lang_invoke_MemberName::_type_offset; 3101 int java_lang_invoke_MemberName::_flags_offset; 3102 int java_lang_invoke_MemberName::_method_offset; 3103 int java_lang_invoke_MemberName::_vmindex_offset; 3104 3105 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3106 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3107 3108 int java_lang_invoke_LambdaForm::_vmentry_offset; 3109 3110 void java_lang_invoke_MethodHandle::compute_offsets() { 3111 Klass* k = SystemDictionary::MethodHandle_klass(); 3112 if (k != NULL) { 3113 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 3114 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 3115 } 3116 } 3117 3118 void java_lang_invoke_MemberName::compute_offsets() { 3119 Klass* k = SystemDictionary::MemberName_klass(); 3120 assert (k != NULL, "jdk mismatch"); 3121 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 3122 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 3123 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 3124 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 3125 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature()); 3126 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3127 } 3128 3129 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3130 Klass* k = SystemDictionary::ResolvedMethodName_klass(); 3131 assert(k != NULL, "jdk mismatch"); 3132 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3133 } 3134 3135 void java_lang_invoke_LambdaForm::compute_offsets() { 3136 Klass* k = SystemDictionary::LambdaForm_klass(); 3137 assert (k != NULL, "jdk mismatch"); 3138 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 3139 } 3140 3141 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3142 return obj != NULL && is_subclass(obj->klass()); 3143 } 3144 3145 3146 oop java_lang_invoke_MethodHandle::type(oop mh) { 3147 return mh->obj_field(_type_offset); 3148 } 3149 3150 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3151 mh->obj_field_put(_type_offset, mtype); 3152 } 3153 3154 oop java_lang_invoke_MethodHandle::form(oop mh) { 3155 assert(_form_offset != 0, ""); 3156 return mh->obj_field(_form_offset); 3157 } 3158 3159 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3160 assert(_form_offset != 0, ""); 3161 mh->obj_field_put(_form_offset, lform); 3162 } 3163 3164 /// MemberName accessors 3165 3166 oop java_lang_invoke_MemberName::clazz(oop mname) { 3167 assert(is_instance(mname), "wrong type"); 3168 return mname->obj_field(_clazz_offset); 3169 } 3170 3171 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3172 assert(is_instance(mname), "wrong type"); 3173 mname->obj_field_put(_clazz_offset, clazz); 3174 } 3175 3176 oop java_lang_invoke_MemberName::name(oop mname) { 3177 assert(is_instance(mname), "wrong type"); 3178 return mname->obj_field(_name_offset); 3179 } 3180 3181 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3182 assert(is_instance(mname), "wrong type"); 3183 mname->obj_field_put(_name_offset, name); 3184 } 3185 3186 oop java_lang_invoke_MemberName::type(oop mname) { 3187 assert(is_instance(mname), "wrong type"); 3188 return mname->obj_field(_type_offset); 3189 } 3190 3191 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3192 assert(is_instance(mname), "wrong type"); 3193 mname->obj_field_put(_type_offset, type); 3194 } 3195 3196 int java_lang_invoke_MemberName::flags(oop mname) { 3197 assert(is_instance(mname), "wrong type"); 3198 return mname->int_field(_flags_offset); 3199 } 3200 3201 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3202 assert(is_instance(mname), "wrong type"); 3203 mname->int_field_put(_flags_offset, flags); 3204 } 3205 3206 3207 // Return vmtarget from ResolvedMethodName method field through indirection 3208 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3209 assert(is_instance(mname), "wrong type"); 3210 oop method = mname->obj_field(_method_offset); 3211 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3212 } 3213 3214 bool java_lang_invoke_MemberName::is_method(oop mname) { 3215 assert(is_instance(mname), "must be MemberName"); 3216 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3217 } 3218 3219 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3220 assert(is_instance(mname), "wrong type"); 3221 mname->obj_field_put(_method_offset, resolved_method); 3222 } 3223 3224 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3225 assert(is_instance(mname), "wrong type"); 3226 return (intptr_t) mname->address_field(_vmindex_offset); 3227 } 3228 3229 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3230 assert(is_instance(mname), "wrong type"); 3231 mname->address_field_put(_vmindex_offset, (address) index); 3232 } 3233 3234 3235 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3236 assert(is_instance(resolved_method), "wrong type"); 3237 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3238 assert(m->is_method(), "must be"); 3239 return m; 3240 } 3241 3242 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3243 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3244 assert(is_instance(resolved_method), "wrong type"); 3245 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3246 } 3247 3248 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3249 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3250 oop resolved_method = ResolvedMethodTable::find_method(m()); 3251 if (resolved_method == NULL) { 3252 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3253 if (!k->is_initialized()) { 3254 k->initialize(CHECK_NULL); 3255 } 3256 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3257 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3258 // Add a reference to the loader (actually mirror because anonymous classes will not have 3259 // distinct loaders) to ensure the metadata is kept alive. 3260 // This mirror may be different than the one in clazz field. 3261 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3262 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3263 } 3264 return resolved_method; 3265 } 3266 3267 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3268 assert(is_instance(lform), "wrong type"); 3269 return lform->obj_field(_vmentry_offset); 3270 } 3271 3272 3273 // Support for java_lang_invoke_MethodType 3274 3275 int java_lang_invoke_MethodType::_rtype_offset; 3276 int java_lang_invoke_MethodType::_ptypes_offset; 3277 3278 void java_lang_invoke_MethodType::compute_offsets() { 3279 Klass* k = SystemDictionary::MethodType_klass(); 3280 if (k != NULL) { 3281 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 3282 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 3283 } 3284 } 3285 3286 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3287 st->print("("); 3288 objArrayOop pts = ptypes(mt); 3289 for (int i = 0, limit = pts->length(); i < limit; i++) { 3290 java_lang_Class::print_signature(pts->obj_at(i), st); 3291 } 3292 st->print(")"); 3293 java_lang_Class::print_signature(rtype(mt), st); 3294 } 3295 3296 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3297 ResourceMark rm; 3298 stringStream buffer(128); 3299 print_signature(mt, &buffer); 3300 const char* sigstr = buffer.base(); 3301 int siglen = (int) buffer.size(); 3302 Symbol *name; 3303 if (!intern_if_not_found) { 3304 name = SymbolTable::probe(sigstr, siglen); 3305 } else { 3306 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3307 } 3308 return name; 3309 } 3310 3311 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3312 if (mt1 == mt2) 3313 return true; 3314 if (rtype(mt1) != rtype(mt2)) 3315 return false; 3316 if (ptype_count(mt1) != ptype_count(mt2)) 3317 return false; 3318 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3319 if (ptype(mt1, i) != ptype(mt2, i)) 3320 return false; 3321 } 3322 return true; 3323 } 3324 3325 oop java_lang_invoke_MethodType::rtype(oop mt) { 3326 assert(is_instance(mt), "must be a MethodType"); 3327 return mt->obj_field(_rtype_offset); 3328 } 3329 3330 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3331 assert(is_instance(mt), "must be a MethodType"); 3332 return (objArrayOop) mt->obj_field(_ptypes_offset); 3333 } 3334 3335 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3336 return ptypes(mt)->obj_at(idx); 3337 } 3338 3339 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3340 return ptypes(mt)->length(); 3341 } 3342 3343 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3344 objArrayOop pts = ptypes(mt); 3345 int count = pts->length(); 3346 int slots = 0; 3347 for (int i = 0; i < count; i++) { 3348 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3349 slots += type2size[bt]; 3350 } 3351 return slots; 3352 } 3353 3354 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3355 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3356 return type2size[bt]; 3357 } 3358 3359 3360 // Support for java_lang_invoke_CallSite 3361 3362 int java_lang_invoke_CallSite::_target_offset; 3363 int java_lang_invoke_CallSite::_context_offset; 3364 3365 void java_lang_invoke_CallSite::compute_offsets() { 3366 Klass* k = SystemDictionary::CallSite_klass(); 3367 if (k != NULL) { 3368 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3369 compute_offset(_context_offset, k, vmSymbols::context_name(), 3370 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3371 } 3372 } 3373 3374 oop java_lang_invoke_CallSite::context(oop call_site) { 3375 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3376 3377 oop dep_oop = call_site->obj_field(_context_offset); 3378 return dep_oop; 3379 } 3380 3381 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3382 3383 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3384 3385 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3386 Klass* k = SystemDictionary::Context_klass(); 3387 if (k != NULL) { 3388 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3389 } 3390 } 3391 3392 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3393 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3394 intptr_t* vmdeps_addr = (intptr_t*)call_site->address_field_addr(_vmdependencies_offset); 3395 DependencyContext dep_ctx(vmdeps_addr); 3396 return dep_ctx; 3397 } 3398 3399 // Support for java_security_AccessControlContext 3400 3401 int java_security_AccessControlContext::_context_offset = 0; 3402 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3403 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3404 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3405 3406 void java_security_AccessControlContext::compute_offsets() { 3407 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3408 fieldDescriptor fd; 3409 InstanceKlass* ik = SystemDictionary::AccessControlContext_klass(); 3410 3411 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3412 fatal("Invalid layout of java.security.AccessControlContext"); 3413 } 3414 _context_offset = fd.offset(); 3415 3416 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3417 fatal("Invalid layout of java.security.AccessControlContext"); 3418 } 3419 _privilegedContext_offset = fd.offset(); 3420 3421 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3422 fatal("Invalid layout of java.security.AccessControlContext"); 3423 } 3424 _isPrivileged_offset = fd.offset(); 3425 3426 // The offset may not be present for bootstrapping with older JDK. 3427 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3428 _isAuthorized_offset = fd.offset(); 3429 } 3430 } 3431 3432 3433 bool java_security_AccessControlContext::is_authorized(Handle context) { 3434 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3435 assert(_isAuthorized_offset != -1, "should be set"); 3436 return context->bool_field(_isAuthorized_offset) != 0; 3437 } 3438 3439 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3440 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3441 // Ensure klass is initialized 3442 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3443 // Allocate result 3444 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3445 // Fill in values 3446 result->obj_field_put(_context_offset, context()); 3447 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3448 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3449 // whitelist AccessControlContexts created by the JVM if present 3450 if (_isAuthorized_offset != -1) { 3451 result->bool_field_put(_isAuthorized_offset, true); 3452 } 3453 return result; 3454 } 3455 3456 3457 // Support for java_lang_ClassLoader 3458 3459 bool java_lang_ClassLoader::offsets_computed = false; 3460 int java_lang_ClassLoader::_loader_data_offset = -1; 3461 int java_lang_ClassLoader::parallelCapable_offset = -1; 3462 int java_lang_ClassLoader::name_offset = -1; 3463 int java_lang_ClassLoader::unnamedModule_offset = -1; 3464 3465 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3466 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3467 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3468 } 3469 3470 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3471 return *java_lang_ClassLoader::loader_data_addr(loader); 3472 } 3473 3474 void java_lang_ClassLoader::compute_offsets() { 3475 assert(!offsets_computed, "offsets should be initialized only once"); 3476 offsets_computed = true; 3477 3478 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3479 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3480 compute_optional_offset(parallelCapable_offset, 3481 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3482 3483 compute_offset(name_offset, 3484 k1, vmSymbols::name_name(), vmSymbols::string_signature()); 3485 3486 compute_offset(unnamedModule_offset, 3487 k1, vmSymbols::unnamedModule_name(), vmSymbols::module_signature()); 3488 3489 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3490 } 3491 3492 oop java_lang_ClassLoader::parent(oop loader) { 3493 assert(is_instance(loader), "loader must be oop"); 3494 return loader->obj_field(parent_offset); 3495 } 3496 3497 oop java_lang_ClassLoader::name(oop loader) { 3498 assert(is_instance(loader), "loader must be oop"); 3499 return loader->obj_field(name_offset); 3500 } 3501 3502 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3503 assert(is_instance(loader), "loader must be oop"); 3504 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3505 oop acl = loader; 3506 debug_only(jint loop_count = 0); 3507 // This loop taken verbatim from ClassLoader.java: 3508 do { 3509 acl = parent(acl); 3510 if (cl == acl) { 3511 return true; 3512 } 3513 assert(++loop_count > 0, "loop_count overflow"); 3514 } while (acl != NULL); 3515 return false; 3516 } 3517 3518 bool java_lang_ClassLoader::is_instance(oop obj) { 3519 return obj != NULL && is_subclass(obj->klass()); 3520 } 3521 3522 3523 // For class loader classes, parallelCapable defined 3524 // based on non-null field 3525 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3526 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3527 if (parallelCapable_offset == -1) { 3528 // Default for backward compatibility is false 3529 return false; 3530 } 3531 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3532 } 3533 3534 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3535 // Fix for 4474172; see evaluation for more details 3536 loader = non_reflection_class_loader(loader); 3537 3538 oop cl = SystemDictionary::java_system_loader(); 3539 while(cl != NULL) { 3540 if (cl == loader) return true; 3541 cl = parent(cl); 3542 } 3543 return false; 3544 } 3545 3546 // Return true if this is one of the class loaders associated with 3547 // the generated bytecodes for reflection. 3548 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 3549 if (loader != NULL) { 3550 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3551 // This might be null in non-1.4 JDKs 3552 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 3553 } 3554 return false; 3555 } 3556 3557 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3558 // See whether this is one of the class loaders associated with 3559 // the generated bytecodes for reflection, and if so, "magically" 3560 // delegate to its parent to prevent class loading from occurring 3561 // in places where applications using reflection didn't expect it. 3562 if (is_reflection_class_loader(loader)) { 3563 return parent(loader); 3564 } 3565 return loader; 3566 } 3567 3568 oop java_lang_ClassLoader::unnamedModule(oop loader) { 3569 assert(is_instance(loader), "loader must be oop"); 3570 return loader->obj_field(unnamedModule_offset); 3571 } 3572 3573 // Support for java_lang_System 3574 int java_lang_System::in_offset_in_bytes() { 3575 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3576 } 3577 3578 3579 int java_lang_System::out_offset_in_bytes() { 3580 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3581 } 3582 3583 3584 int java_lang_System::err_offset_in_bytes() { 3585 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3586 } 3587 3588 3589 bool java_lang_System::has_security_manager() { 3590 InstanceKlass* ik = SystemDictionary::System_klass(); 3591 address addr = ik->static_field_addr(static_security_offset); 3592 if (UseCompressedOops) { 3593 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3594 } else { 3595 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3596 } 3597 } 3598 3599 int java_lang_Class::_klass_offset; 3600 int java_lang_Class::_array_klass_offset; 3601 int java_lang_Class::_oop_size_offset; 3602 int java_lang_Class::_static_oop_field_count_offset; 3603 int java_lang_Class::_class_loader_offset; 3604 int java_lang_Class::_module_offset; 3605 int java_lang_Class::_protection_domain_offset; 3606 int java_lang_Class::_component_mirror_offset; 3607 int java_lang_Class::_init_lock_offset; 3608 int java_lang_Class::_signers_offset; 3609 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3610 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 3611 int java_lang_Throwable::backtrace_offset; 3612 int java_lang_Throwable::detailMessage_offset; 3613 int java_lang_Throwable::stackTrace_offset; 3614 int java_lang_Throwable::depth_offset; 3615 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3616 int java_lang_reflect_AccessibleObject::override_offset; 3617 int java_lang_reflect_Method::clazz_offset; 3618 int java_lang_reflect_Method::name_offset; 3619 int java_lang_reflect_Method::returnType_offset; 3620 int java_lang_reflect_Method::parameterTypes_offset; 3621 int java_lang_reflect_Method::exceptionTypes_offset; 3622 int java_lang_reflect_Method::slot_offset; 3623 int java_lang_reflect_Method::modifiers_offset; 3624 int java_lang_reflect_Method::signature_offset; 3625 int java_lang_reflect_Method::annotations_offset; 3626 int java_lang_reflect_Method::parameter_annotations_offset; 3627 int java_lang_reflect_Method::annotation_default_offset; 3628 int java_lang_reflect_Method::type_annotations_offset; 3629 int java_lang_reflect_Constructor::clazz_offset; 3630 int java_lang_reflect_Constructor::parameterTypes_offset; 3631 int java_lang_reflect_Constructor::exceptionTypes_offset; 3632 int java_lang_reflect_Constructor::slot_offset; 3633 int java_lang_reflect_Constructor::modifiers_offset; 3634 int java_lang_reflect_Constructor::signature_offset; 3635 int java_lang_reflect_Constructor::annotations_offset; 3636 int java_lang_reflect_Constructor::parameter_annotations_offset; 3637 int java_lang_reflect_Constructor::type_annotations_offset; 3638 int java_lang_reflect_Field::clazz_offset; 3639 int java_lang_reflect_Field::name_offset; 3640 int java_lang_reflect_Field::type_offset; 3641 int java_lang_reflect_Field::slot_offset; 3642 int java_lang_reflect_Field::modifiers_offset; 3643 int java_lang_reflect_Field::signature_offset; 3644 int java_lang_reflect_Field::annotations_offset; 3645 int java_lang_reflect_Field::type_annotations_offset; 3646 int java_lang_reflect_Parameter::name_offset; 3647 int java_lang_reflect_Parameter::modifiers_offset; 3648 int java_lang_reflect_Parameter::index_offset; 3649 int java_lang_reflect_Parameter::executable_offset; 3650 int java_lang_boxing_object::value_offset; 3651 int java_lang_boxing_object::long_value_offset; 3652 int java_lang_ref_Reference::referent_offset; 3653 int java_lang_ref_Reference::queue_offset; 3654 int java_lang_ref_Reference::next_offset; 3655 int java_lang_ref_Reference::discovered_offset; 3656 int java_lang_ref_Reference::number_of_fake_oop_fields; 3657 int java_lang_ref_SoftReference::timestamp_offset; 3658 int java_lang_ref_SoftReference::static_clock_offset; 3659 int java_lang_ClassLoader::parent_offset; 3660 int java_lang_System::static_in_offset; 3661 int java_lang_System::static_out_offset; 3662 int java_lang_System::static_err_offset; 3663 int java_lang_System::static_security_offset; 3664 int java_lang_StackTraceElement::methodName_offset; 3665 int java_lang_StackTraceElement::fileName_offset; 3666 int java_lang_StackTraceElement::lineNumber_offset; 3667 int java_lang_StackTraceElement::moduleName_offset; 3668 int java_lang_StackTraceElement::moduleVersion_offset; 3669 int java_lang_StackTraceElement::classLoaderName_offset; 3670 int java_lang_StackTraceElement::declaringClass_offset; 3671 int java_lang_StackTraceElement::declaringClassObject_offset; 3672 int java_lang_StackFrameInfo::_declaringClass_offset; 3673 int java_lang_StackFrameInfo::_memberName_offset; 3674 int java_lang_StackFrameInfo::_bci_offset; 3675 int java_lang_StackFrameInfo::_version_offset; 3676 int java_lang_LiveStackFrameInfo::_monitors_offset; 3677 int java_lang_LiveStackFrameInfo::_locals_offset; 3678 int java_lang_LiveStackFrameInfo::_operands_offset; 3679 int java_lang_LiveStackFrameInfo::_mode_offset; 3680 int java_lang_AssertionStatusDirectives::classes_offset; 3681 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3682 int java_lang_AssertionStatusDirectives::packages_offset; 3683 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3684 int java_lang_AssertionStatusDirectives::deflt_offset; 3685 int java_nio_Buffer::_limit_offset; 3686 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3687 int reflect_ConstantPool::_oop_offset; 3688 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3689 3690 3691 // Support for java_lang_StackTraceElement 3692 3693 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3694 element->obj_field_put(fileName_offset, value); 3695 } 3696 3697 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3698 element->obj_field_put(declaringClass_offset, value); 3699 } 3700 3701 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3702 element->obj_field_put(methodName_offset, value); 3703 } 3704 3705 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3706 element->int_field_put(lineNumber_offset, value); 3707 } 3708 3709 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 3710 element->obj_field_put(moduleName_offset, value); 3711 } 3712 3713 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 3714 element->obj_field_put(moduleVersion_offset, value); 3715 } 3716 3717 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 3718 element->obj_field_put(classLoaderName_offset, value); 3719 } 3720 3721 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 3722 element->obj_field_put(declaringClassObject_offset, value); 3723 } 3724 3725 // Support for java_lang_StackFrameInfo 3726 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3727 element->obj_field_put(_declaringClass_offset, value); 3728 } 3729 3730 void java_lang_StackFrameInfo::set_version(oop element, short value) { 3731 element->short_field_put(_version_offset, value); 3732 } 3733 3734 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3735 element->int_field_put(_bci_offset, value); 3736 } 3737 3738 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3739 element->obj_field_put(_monitors_offset, value); 3740 } 3741 3742 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3743 element->obj_field_put(_locals_offset, value); 3744 } 3745 3746 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3747 element->obj_field_put(_operands_offset, value); 3748 } 3749 3750 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 3751 element->int_field_put(_mode_offset, value); 3752 } 3753 3754 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3755 3756 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3757 o->obj_field_put(classes_offset, val); 3758 } 3759 3760 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3761 o->obj_field_put(classEnabled_offset, val); 3762 } 3763 3764 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3765 o->obj_field_put(packages_offset, val); 3766 } 3767 3768 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3769 o->obj_field_put(packageEnabled_offset, val); 3770 } 3771 3772 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3773 o->bool_field_put(deflt_offset, val); 3774 } 3775 3776 3777 // Support for intrinsification of java.nio.Buffer.checkIndex 3778 int java_nio_Buffer::limit_offset() { 3779 return _limit_offset; 3780 } 3781 3782 3783 void java_nio_Buffer::compute_offsets() { 3784 Klass* k = SystemDictionary::nio_Buffer_klass(); 3785 assert(k != NULL, "must be loaded in 1.4+"); 3786 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3787 } 3788 3789 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3790 if (_owner_offset != 0) return; 3791 3792 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3793 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3794 compute_offset(_owner_offset, k, 3795 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3796 } 3797 3798 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3799 assert(_owner_offset != 0, "Must be initialized"); 3800 return obj->obj_field(_owner_offset); 3801 } 3802 3803 // Compute hard-coded offsets 3804 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3805 // are not available to determine the offset_of_static_fields. 3806 void JavaClasses::compute_hard_coded_offsets() { 3807 const int x = heapOopSize; 3808 const int header = instanceOopDesc::base_offset_in_bytes(); 3809 3810 // Throwable Class 3811 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3812 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3813 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3814 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3815 3816 // java_lang_boxing_object 3817 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3818 java_lang_boxing_object::long_value_offset = align_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3819 3820 // java_lang_ref_Reference: 3821 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3822 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3823 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3824 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3825 // Artificial fields for java_lang_ref_Reference 3826 // The first field is for the discovered field added in 1.4 3827 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3828 3829 // java_lang_ref_SoftReference Class 3830 java_lang_ref_SoftReference::timestamp_offset = align_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3831 // Don't multiply static fields because they are always in wordSize units 3832 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3833 3834 // java_lang_ClassLoader 3835 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3836 3837 // java_lang_System 3838 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3839 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3840 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3841 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3842 3843 // java_lang_StackTraceElement 3844 java_lang_StackTraceElement::declaringClassObject_offset = java_lang_StackTraceElement::hc_declaringClassObject_offset * x + header; 3845 java_lang_StackTraceElement::classLoaderName_offset = java_lang_StackTraceElement::hc_classLoaderName_offset * x + header; 3846 java_lang_StackTraceElement::moduleName_offset = java_lang_StackTraceElement::hc_moduleName_offset * x + header; 3847 java_lang_StackTraceElement::moduleVersion_offset = java_lang_StackTraceElement::hc_moduleVersion_offset * x + header; 3848 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3849 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3850 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3851 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3852 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3853 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3854 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3855 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3856 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3857 3858 } 3859 3860 3861 // Compute non-hard-coded field offsets of all the classes in this file 3862 void JavaClasses::compute_offsets() { 3863 // java_lang_Class::compute_offsets was called earlier in bootstrap 3864 java_lang_ClassLoader::compute_offsets(); 3865 java_lang_Throwable::compute_offsets(); 3866 java_lang_Thread::compute_offsets(); 3867 java_lang_ThreadGroup::compute_offsets(); 3868 java_lang_invoke_MethodHandle::compute_offsets(); 3869 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3870 java_lang_invoke_MemberName::compute_offsets(); 3871 java_lang_invoke_ResolvedMethodName::compute_offsets(); 3872 java_lang_invoke_LambdaForm::compute_offsets(); 3873 java_lang_invoke_MethodType::compute_offsets(); 3874 java_lang_invoke_CallSite::compute_offsets(); 3875 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3876 java_security_AccessControlContext::compute_offsets(); 3877 // Initialize reflection classes. The layouts of these classes 3878 // changed with the new reflection implementation in JDK 1.4, and 3879 // since the Universe doesn't know what JDK version it is until this 3880 // point we defer computation of these offsets until now. 3881 java_lang_reflect_AccessibleObject::compute_offsets(); 3882 java_lang_reflect_Method::compute_offsets(); 3883 java_lang_reflect_Constructor::compute_offsets(); 3884 java_lang_reflect_Field::compute_offsets(); 3885 java_nio_Buffer::compute_offsets(); 3886 reflect_ConstantPool::compute_offsets(); 3887 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3888 java_lang_reflect_Parameter::compute_offsets(); 3889 java_lang_Module::compute_offsets(); 3890 java_lang_StackFrameInfo::compute_offsets(); 3891 java_lang_LiveStackFrameInfo::compute_offsets(); 3892 3893 // generated interpreter code wants to know about the offsets we just computed: 3894 AbstractAssembler::update_delayed_values(); 3895 } 3896 3897 #ifndef PRODUCT 3898 3899 // These functions exist to assert the validity of hard-coded field offsets to guard 3900 // against changes in the class files 3901 3902 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3903 EXCEPTION_MARK; 3904 fieldDescriptor fd; 3905 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3906 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3907 InstanceKlass* ik = InstanceKlass::cast(k); 3908 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3909 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3910 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3911 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3912 return false; 3913 } 3914 if (fd.is_static()) { 3915 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3916 return false; 3917 } 3918 if (fd.offset() == hardcoded_offset ) { 3919 return true; 3920 } else { 3921 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3922 klass_name, field_name, hardcoded_offset, fd.offset()); 3923 return false; 3924 } 3925 } 3926 3927 3928 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3929 EXCEPTION_MARK; 3930 fieldDescriptor fd; 3931 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3932 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3933 InstanceKlass* ik = InstanceKlass::cast(k); 3934 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3935 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3936 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3937 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3938 return false; 3939 } 3940 if (!fd.is_static()) { 3941 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3942 return false; 3943 } 3944 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3945 return true; 3946 } else { 3947 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()); 3948 return false; 3949 } 3950 } 3951 3952 3953 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3954 EXCEPTION_MARK; 3955 fieldDescriptor fd; 3956 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3957 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3958 InstanceKlass* ik = InstanceKlass::cast(k); 3959 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3960 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3961 if (!ik->find_local_field(f_name, f_sig, &fd)) { 3962 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3963 return false; 3964 } 3965 if (!fd.is_static() || !fd.has_initial_value()) { 3966 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3967 return false; 3968 } 3969 if (!fd.initial_value_tag().is_int()) { 3970 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3971 return false; 3972 } 3973 jint field_value = fd.int_initial_value(); 3974 if (field_value == hardcoded_constant) { 3975 return true; 3976 } else { 3977 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); 3978 return false; 3979 } 3980 } 3981 3982 3983 // Check the hard-coded field offsets of all the classes in this file 3984 3985 void JavaClasses::check_offsets() { 3986 bool valid = true; 3987 3988 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3989 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3990 3991 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3992 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3993 3994 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3995 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3996 3997 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3998 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3999 4000 // java.lang.String 4001 4002 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[B"); 4003 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 4004 CHECK_OFFSET("java/lang/String", java_lang_String, coder, "B"); 4005 4006 // java.lang.Class 4007 4008 // Fake fields 4009 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 4010 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 4011 4012 // java.lang.Throwable 4013 4014 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 4015 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 4016 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 4017 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, depth, "I"); 4018 4019 // Boxed primitive objects (java_lang_boxing_object) 4020 4021 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4022 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4023 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4024 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4025 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4026 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4027 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4028 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4029 4030 // java.lang.ClassLoader 4031 4032 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 4033 4034 // java.lang.System 4035 4036 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 4037 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 4038 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 4039 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 4040 4041 // java.lang.StackTraceElement 4042 4043 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClassObject, "Ljava/lang/Class;"); 4044 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, classLoaderName, "Ljava/lang/String;"); 4045 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleName, "Ljava/lang/String;"); 4046 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, moduleVersion, "Ljava/lang/String;"); 4047 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 4048 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 4049 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 4050 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 4051 4052 // java.lang.ref.Reference 4053 4054 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4055 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4056 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4057 // Fake field 4058 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4059 4060 // java.lang.ref.SoftReference 4061 4062 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 4063 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 4064 4065 // java.lang.AssertionStatusDirectives 4066 // 4067 // The CheckAssertionStatusDirectives boolean can be removed from here and 4068 // globals.hpp after the AssertionStatusDirectives class has been integrated 4069 // into merlin "for some time." Without it, the vm will fail with early 4070 // merlin builds. 4071 4072 if (CheckAssertionStatusDirectives) { 4073 const char* nm = "java/lang/AssertionStatusDirectives"; 4074 const char* sig = "[Ljava/lang/String;"; 4075 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 4076 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 4077 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 4078 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 4079 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 4080 } 4081 4082 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4083 } 4084 4085 #endif // PRODUCT 4086 4087 int InjectedField::compute_offset() { 4088 InstanceKlass* ik = InstanceKlass::cast(klass()); 4089 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4090 if (!may_be_java && !fs.access_flags().is_internal()) { 4091 // Only look at injected fields 4092 continue; 4093 } 4094 if (fs.name() == name() && fs.signature() == signature()) { 4095 return fs.offset(); 4096 } 4097 } 4098 ResourceMark rm; 4099 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)" : ""); 4100 #ifndef PRODUCT 4101 ik->print(); 4102 tty->print_cr("all fields:"); 4103 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4104 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4105 } 4106 #endif //PRODUCT 4107 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4108 return -1; 4109 } 4110 4111 void javaClasses_init() { 4112 JavaClasses::compute_offsets(); 4113 JavaClasses::check_offsets(); 4114 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4115 }