1 /* 2 * Copyright (c) 1997, 2011, 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/classLoader.hpp" 27 #include "classfile/javaAssertions.hpp" 28 #include "classfile/javaClasses.hpp" 29 #include "classfile/symbolTable.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "gc_interface/collectedHeap.inline.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/instanceKlass.hpp" 36 #include "oops/objArrayKlass.hpp" 37 #include "prims/jvm.h" 38 #include "prims/jvm_misc.hpp" 39 #include "prims/jvmtiExport.hpp" 40 #include "prims/jvmtiThreadState.hpp" 41 #include "prims/nativeLookup.hpp" 42 #include "prims/privilegedStack.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/dtraceJSDT.hpp" 45 #include "runtime/handles.inline.hpp" 46 #include "runtime/init.hpp" 47 #include "runtime/interfaceSupport.hpp" 48 #include "runtime/java.hpp" 49 #include "runtime/javaCalls.hpp" 50 #include "runtime/jfieldIDWorkaround.hpp" 51 #include "runtime/os.hpp" 52 #include "runtime/perfData.hpp" 53 #include "runtime/reflection.hpp" 54 #include "runtime/vframe.hpp" 55 #include "runtime/vm_operations.hpp" 56 #include "services/attachListener.hpp" 57 #include "services/management.hpp" 58 #include "services/threadService.hpp" 59 #include "utilities/copy.hpp" 60 #include "utilities/defaultStream.hpp" 61 #include "utilities/dtrace.hpp" 62 #include "utilities/events.hpp" 63 #include "utilities/histogram.hpp" 64 #include "utilities/top.hpp" 65 #include "utilities/utf8.hpp" 66 #ifdef TARGET_OS_FAMILY_linux 67 # include "jvm_linux.h" 68 #endif 69 #ifdef TARGET_OS_FAMILY_solaris 70 # include "jvm_solaris.h" 71 #endif 72 #ifdef TARGET_OS_FAMILY_windows 73 # include "jvm_windows.h" 74 #endif 75 76 #include <errno.h> 77 78 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 79 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 80 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 81 82 /* 83 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 84 such ctors and calls MUST NOT come between an oop declaration/init and its 85 usage because if objects are move this may cause various memory stomps, bus 86 errors and segfaults. Here is a cookbook for causing so called "naked oop 87 failures": 88 89 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 90 JVMWrapper("JVM_GetClassDeclaredFields"); 91 92 // Object address to be held directly in mirror & not visible to GC 93 oop mirror = JNIHandles::resolve_non_null(ofClass); 94 95 // If this ctor can hit a safepoint, moving objects around, then 96 ComplexConstructor foo; 97 98 // Boom! mirror may point to JUNK instead of the intended object 99 (some dereference of mirror) 100 101 // Here's another call that may block for GC, making mirror stale 102 MutexLocker ml(some_lock); 103 104 // And here's an initializer that can result in a stale oop 105 // all in one step. 106 oop o = call_that_can_throw_exception(TRAPS); 107 108 109 The solution is to keep the oop declaration BELOW the ctor or function 110 call that might cause a GC, do another resolve to reassign the oop, or 111 consider use of a Handle instead of an oop so there is immunity from object 112 motion. But note that the "QUICK" entries below do not have a handlemark 113 and thus can only support use of handles passed in. 114 */ 115 116 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { 117 ResourceMark rm; 118 int line_number = -1; 119 const char * source_file = NULL; 120 const char * trace = "explicit"; 121 klassOop caller = NULL; 122 JavaThread* jthread = JavaThread::current(); 123 if (jthread->has_last_Java_frame()) { 124 vframeStream vfst(jthread); 125 126 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 127 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 128 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 129 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 130 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 131 132 methodOop last_caller = NULL; 133 134 while (!vfst.at_end()) { 135 methodOop m = vfst.method(); 136 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 137 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && 138 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { 139 break; 140 } 141 last_caller = m; 142 vfst.next(); 143 } 144 // if this is called from Class.forName0 and that is called from Class.forName, 145 // then print the caller of Class.forName. If this is Class.loadClass, then print 146 // that caller, otherwise keep quiet since this should be picked up elsewhere. 147 bool found_it = false; 148 if (!vfst.at_end() && 149 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 150 vfst.method()->name() == vmSymbols::forName0_name()) { 151 vfst.next(); 152 if (!vfst.at_end() && 153 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 154 vfst.method()->name() == vmSymbols::forName_name()) { 155 vfst.next(); 156 found_it = true; 157 } 158 } else if (last_caller != NULL && 159 instanceKlass::cast(last_caller->method_holder())->name() == 160 vmSymbols::java_lang_ClassLoader() && 161 (last_caller->name() == vmSymbols::loadClassInternal_name() || 162 last_caller->name() == vmSymbols::loadClass_name())) { 163 found_it = true; 164 } else if (!vfst.at_end()) { 165 if (vfst.method()->is_native()) { 166 // JNI call 167 found_it = true; 168 } 169 } 170 if (found_it && !vfst.at_end()) { 171 // found the caller 172 caller = vfst.method()->method_holder(); 173 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 174 if (line_number == -1) { 175 // show method name if it's a native method 176 trace = vfst.method()->name_and_sig_as_C_string(); 177 } 178 Symbol* s = instanceKlass::cast(caller)->source_file_name(); 179 if (s != NULL) { 180 source_file = s->as_C_string(); 181 } 182 } 183 } 184 if (caller != NULL) { 185 if (to_class != caller) { 186 const char * from = Klass::cast(caller)->external_name(); 187 const char * to = Klass::cast(to_class)->external_name(); 188 // print in a single call to reduce interleaving between threads 189 if (source_file != NULL) { 190 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 191 } else { 192 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 193 } 194 } 195 } 196 } 197 198 void trace_class_resolution(klassOop to_class) { 199 EXCEPTION_MARK; 200 trace_class_resolution_impl(to_class, THREAD); 201 if (HAS_PENDING_EXCEPTION) { 202 CLEAR_PENDING_EXCEPTION; 203 } 204 } 205 206 // Wrapper to trace JVM functions 207 208 #ifdef ASSERT 209 class JVMTraceWrapper : public StackObj { 210 public: 211 JVMTraceWrapper(const char* format, ...) { 212 if (TraceJVMCalls) { 213 va_list ap; 214 va_start(ap, format); 215 tty->print("JVM "); 216 tty->vprint_cr(format, ap); 217 va_end(ap); 218 } 219 } 220 }; 221 222 Histogram* JVMHistogram; 223 volatile jint JVMHistogram_lock = 0; 224 225 class JVMHistogramElement : public HistogramElement { 226 public: 227 JVMHistogramElement(const char* name); 228 }; 229 230 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 231 _name = elementName; 232 uintx count = 0; 233 234 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 235 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 236 count +=1; 237 if ( (WarnOnStalledSpinLock > 0) 238 && (count % WarnOnStalledSpinLock == 0)) { 239 warning("JVMHistogram_lock seems to be stalled"); 240 } 241 } 242 } 243 244 if(JVMHistogram == NULL) 245 JVMHistogram = new Histogram("JVM Call Counts",100); 246 247 JVMHistogram->add_element(this); 248 Atomic::dec(&JVMHistogram_lock); 249 } 250 251 #define JVMCountWrapper(arg) \ 252 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 253 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 254 255 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 256 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 257 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 258 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 259 #else 260 #define JVMWrapper(arg1) 261 #define JVMWrapper2(arg1, arg2) 262 #define JVMWrapper3(arg1, arg2, arg3) 263 #define JVMWrapper4(arg1, arg2, arg3, arg4) 264 #endif 265 266 267 // Interface version ///////////////////////////////////////////////////////////////////// 268 269 270 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 271 return JVM_INTERFACE_VERSION; 272 JVM_END 273 274 275 // java.lang.System ////////////////////////////////////////////////////////////////////// 276 277 278 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 279 JVMWrapper("JVM_CurrentTimeMillis"); 280 return os::javaTimeMillis(); 281 JVM_END 282 283 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 284 JVMWrapper("JVM_NanoTime"); 285 return os::javaTimeNanos(); 286 JVM_END 287 288 289 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 290 jobject dst, jint dst_pos, jint length)) 291 JVMWrapper("JVM_ArrayCopy"); 292 // Check if we have null pointers 293 if (src == NULL || dst == NULL) { 294 THROW(vmSymbols::java_lang_NullPointerException()); 295 } 296 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 297 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 298 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 299 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 300 // Do copy 301 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); 302 JVM_END 303 304 305 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 306 JavaValue r(T_OBJECT); 307 // public synchronized Object put(Object key, Object value); 308 HandleMark hm(THREAD); 309 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 310 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 311 JavaCalls::call_virtual(&r, 312 props, 313 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 314 vmSymbols::put_name(), 315 vmSymbols::object_object_object_signature(), 316 key_str, 317 value_str, 318 THREAD); 319 } 320 321 322 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 323 324 325 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 326 JVMWrapper("JVM_InitProperties"); 327 ResourceMark rm; 328 329 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 330 331 // System property list includes both user set via -D option and 332 // jvm system specific properties. 333 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 334 PUTPROP(props, p->key(), p->value()); 335 } 336 337 // Convert the -XX:MaxDirectMemorySize= command line flag 338 // to the sun.nio.MaxDirectMemorySize property. 339 // Do this after setting user properties to prevent people 340 // from setting the value with a -D option, as requested. 341 { 342 char as_chars[256]; 343 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); 344 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 345 } 346 347 // JVM monitoring and management support 348 // Add the sun.management.compiler property for the compiler's name 349 { 350 #undef CSIZE 351 #if defined(_LP64) || defined(_WIN64) 352 #define CSIZE "64-Bit " 353 #else 354 #define CSIZE 355 #endif // 64bit 356 357 #ifdef TIERED 358 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 359 #else 360 #if defined(COMPILER1) 361 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 362 #elif defined(COMPILER2) 363 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 364 #else 365 const char* compiler_name = ""; 366 #endif // compilers 367 #endif // TIERED 368 369 if (*compiler_name != '\0' && 370 (Arguments::mode() != Arguments::_int)) { 371 PUTPROP(props, "sun.management.compiler", compiler_name); 372 } 373 } 374 375 return properties; 376 JVM_END 377 378 379 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 380 381 extern volatile jint vm_created; 382 383 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 384 if (vm_created != 0 && (code == 0)) { 385 // The VM is about to exit. We call back into Java to check whether finalizers should be run 386 Universe::run_finalizers_on_exit(); 387 } 388 before_exit(thread); 389 vm_exit(code); 390 JVM_END 391 392 393 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 394 before_exit(thread); 395 vm_exit(code); 396 JVM_END 397 398 399 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 400 register_on_exit_function(func); 401 JVM_END 402 403 404 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 405 JVMWrapper("JVM_GC"); 406 if (!DisableExplicitGC) { 407 Universe::heap()->collect(GCCause::_java_lang_system_gc); 408 } 409 JVM_END 410 411 412 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 413 JVMWrapper("JVM_MaxObjectInspectionAge"); 414 return Universe::heap()->millis_since_last_gc(); 415 JVM_END 416 417 418 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 419 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 420 JVM_END 421 422 423 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 424 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 425 JVM_END 426 427 static inline jlong convert_size_t_to_jlong(size_t val) { 428 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 429 NOT_LP64 (return (jlong)val;) 430 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 431 } 432 433 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 434 JVMWrapper("JVM_TotalMemory"); 435 size_t n = Universe::heap()->capacity(); 436 return convert_size_t_to_jlong(n); 437 JVM_END 438 439 440 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 441 JVMWrapper("JVM_FreeMemory"); 442 CollectedHeap* ch = Universe::heap(); 443 size_t n; 444 { 445 MutexLocker x(Heap_lock); 446 n = ch->capacity() - ch->used(); 447 } 448 return convert_size_t_to_jlong(n); 449 JVM_END 450 451 452 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 453 JVMWrapper("JVM_MaxMemory"); 454 size_t n = Universe::heap()->max_capacity(); 455 return convert_size_t_to_jlong(n); 456 JVM_END 457 458 459 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 460 JVMWrapper("JVM_ActiveProcessorCount"); 461 return os::active_processor_count(); 462 JVM_END 463 464 465 466 // java.lang.Throwable ////////////////////////////////////////////////////// 467 468 469 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 470 JVMWrapper("JVM_FillInStackTrace"); 471 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 472 java_lang_Throwable::fill_in_stack_trace(exception); 473 JVM_END 474 475 476 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 477 JVMWrapper("JVM_PrintStackTrace"); 478 // Note: This is no longer used in Merlin, but we still support it for compatibility. 479 oop exception = JNIHandles::resolve_non_null(receiver); 480 oop stream = JNIHandles::resolve_non_null(printable); 481 java_lang_Throwable::print_stack_trace(exception, stream); 482 JVM_END 483 484 485 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 486 JVMWrapper("JVM_GetStackTraceDepth"); 487 oop exception = JNIHandles::resolve(throwable); 488 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 489 JVM_END 490 491 492 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 493 JVMWrapper("JVM_GetStackTraceElement"); 494 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 495 oop exception = JNIHandles::resolve(throwable); 496 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 497 return JNIHandles::make_local(env, element); 498 JVM_END 499 500 501 // java.lang.Object /////////////////////////////////////////////// 502 503 504 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 505 JVMWrapper("JVM_IHashCode"); 506 // as implemented in the classic virtual machine; return 0 if object is NULL 507 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 508 JVM_END 509 510 511 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 512 JVMWrapper("JVM_MonitorWait"); 513 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 514 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); 515 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 516 if (JvmtiExport::should_post_monitor_wait()) { 517 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 518 } 519 ObjectSynchronizer::wait(obj, ms, CHECK); 520 JVM_END 521 522 523 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 524 JVMWrapper("JVM_MonitorNotify"); 525 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 526 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); 527 ObjectSynchronizer::notify(obj, CHECK); 528 JVM_END 529 530 531 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 532 JVMWrapper("JVM_MonitorNotifyAll"); 533 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 534 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); 535 ObjectSynchronizer::notifyall(obj, CHECK); 536 JVM_END 537 538 539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 540 JVMWrapper("JVM_Clone"); 541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 542 const KlassHandle klass (THREAD, obj->klass()); 543 JvmtiVMObjectAllocEventCollector oam; 544 545 #ifdef ASSERT 546 // Just checking that the cloneable flag is set correct 547 if (obj->is_javaArray()) { 548 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 549 } else { 550 guarantee(obj->is_instance(), "should be instanceOop"); 551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 553 } 554 #endif 555 556 // Check if class of obj supports the Cloneable interface. 557 // All arrays are considered to be cloneable (See JLS 20.1.5) 558 if (!klass->is_cloneable()) { 559 ResourceMark rm(THREAD); 560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 561 } 562 563 // Make shallow object copy 564 const int size = obj->size(); 565 oop new_obj = NULL; 566 if (obj->is_javaArray()) { 567 const int length = ((arrayOop)obj())->length(); 568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 569 } else { 570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 571 } 572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 573 // is modifying a reference field in the clonee, a non-oop-atomic copy might 574 // be suspended in the middle of copying the pointer and end up with parts 575 // of two different pointers in the field. Subsequent dereferences will crash. 576 // 4846409: an oop-copy of objects with long or double fields or arrays of same 577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 578 // of oops. We know objects are aligned on a minimum of an jlong boundary. 579 // The same is true of StubRoutines::object_copy and the various oop_copy 580 // variants, and of the code generated by the inline_native_clone intrinsic. 581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 583 (size_t)align_object_size(size) / HeapWordsPerLong); 584 // Clear the header 585 new_obj->init_mark(); 586 587 // Store check (mark entire object and let gc sort it out) 588 BarrierSet* bs = Universe::heap()->barrier_set(); 589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 590 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 591 592 // Caution: this involves a java upcall, so the clone should be 593 // "gc-robust" by this stage. 594 if (klass->has_finalizer()) { 595 assert(obj->is_instance(), "should be instanceOop"); 596 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 597 } 598 599 return JNIHandles::make_local(env, oop(new_obj)); 600 JVM_END 601 602 // java.lang.Compiler //////////////////////////////////////////////////// 603 604 // The initial cuts of the HotSpot VM will not support JITs, and all existing 605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 606 // functions are all silently ignored unless JVM warnings are printed. 607 608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 610 JVM_END 611 612 613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 615 return JNI_FALSE; 616 JVM_END 617 618 619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 621 return JNI_FALSE; 622 JVM_END 623 624 625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 627 return JNI_FALSE; 628 JVM_END 629 630 631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 633 return NULL; 634 JVM_END 635 636 637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 639 JVM_END 640 641 642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 644 JVM_END 645 646 647 648 // Error message support ////////////////////////////////////////////////////// 649 650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 651 JVMWrapper("JVM_GetLastErrorString"); 652 return (jint)os::lasterror(buf, len); 653 JVM_END 654 655 656 // java.io.File /////////////////////////////////////////////////////////////// 657 658 JVM_LEAF(char*, JVM_NativePath(char* path)) 659 JVMWrapper2("JVM_NativePath (%s)", path); 660 return os::native_path(path); 661 JVM_END 662 663 664 // Misc. class handling /////////////////////////////////////////////////////////// 665 666 667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 668 JVMWrapper("JVM_GetCallerClass"); 669 klassOop k = thread->security_get_caller_class(depth); 670 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 671 JVM_END 672 673 674 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 675 JVMWrapper("JVM_FindPrimitiveClass"); 676 oop mirror = NULL; 677 BasicType t = name2type(utf); 678 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 679 mirror = Universe::java_mirror(t); 680 } 681 if (mirror == NULL) { 682 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 683 } else { 684 return (jclass) JNIHandles::make_local(env, mirror); 685 } 686 JVM_END 687 688 689 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 690 JVMWrapper("JVM_ResolveClass"); 691 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 692 JVM_END 693 694 695 // Returns a class loaded by the bootstrap class loader; or null 696 // if not found. ClassNotFoundException is not thrown. 697 // 698 // Rationale behind JVM_FindClassFromBootLoader 699 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 700 // b> because of (a) java.dll has a direct dependecy on the unexported 701 // private symbol "_JVM_FindClassFromClassLoader@20". 702 // c> the launcher cannot use the private symbol as it dynamically opens 703 // the entry point, so if something changes, the launcher will fail 704 // unexpectedly at runtime, it is safest for the launcher to dlopen a 705 // stable exported interface. 706 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 707 // signature to change from _JVM_FindClassFromClassLoader@20 to 708 // JVM_FindClassFromClassLoader and will not be backward compatible 709 // with older JDKs. 710 // Thus a public/stable exported entry point is the right solution, 711 // public here means public in linker semantics, and is exported only 712 // to the JDK, and is not intended to be a public API. 713 714 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 715 const char* name)) 716 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 717 718 // Java libraries should ensure that name is never null... 719 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 720 // It's impossible to create this class; the name cannot fit 721 // into the constant pool. 722 return NULL; 723 } 724 725 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 726 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 727 if (k == NULL) { 728 return NULL; 729 } 730 731 if (TraceClassResolution) { 732 trace_class_resolution(k); 733 } 734 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 735 JVM_END 736 737 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 738 jboolean init, jobject loader, 739 jboolean throwError)) 740 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 741 throwError ? "error" : "exception"); 742 // Java libraries should ensure that name is never null... 743 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 744 // It's impossible to create this class; the name cannot fit 745 // into the constant pool. 746 if (throwError) { 747 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 748 } else { 749 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 750 } 751 } 752 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 753 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 754 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 755 Handle(), throwError, THREAD); 756 757 if (TraceClassResolution && result != NULL) { 758 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 759 } 760 return result; 761 JVM_END 762 763 764 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 765 jboolean init, jclass from)) 766 JVMWrapper2("JVM_FindClassFromClass %s", name); 767 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 768 // It's impossible to create this class; the name cannot fit 769 // into the constant pool. 770 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 771 } 772 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 773 oop from_class_oop = JNIHandles::resolve(from); 774 klassOop from_class = (from_class_oop == NULL) 775 ? (klassOop)NULL 776 : java_lang_Class::as_klassOop(from_class_oop); 777 oop class_loader = NULL; 778 oop protection_domain = NULL; 779 if (from_class != NULL) { 780 class_loader = Klass::cast(from_class)->class_loader(); 781 protection_domain = Klass::cast(from_class)->protection_domain(); 782 } 783 Handle h_loader(THREAD, class_loader); 784 Handle h_prot (THREAD, protection_domain); 785 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 786 h_prot, true, thread); 787 788 if (TraceClassResolution && result != NULL) { 789 // this function is generally only used for class loading during verification. 790 ResourceMark rm; 791 oop from_mirror = JNIHandles::resolve_non_null(from); 792 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); 793 const char * from_name = Klass::cast(from_class)->external_name(); 794 795 oop mirror = JNIHandles::resolve_non_null(result); 796 klassOop to_class = java_lang_Class::as_klassOop(mirror); 797 const char * to = Klass::cast(to_class)->external_name(); 798 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 799 } 800 801 return result; 802 JVM_END 803 804 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 805 if (loader.is_null()) { 806 return; 807 } 808 809 // check whether the current caller thread holds the lock or not. 810 // If not, increment the corresponding counter 811 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 812 ObjectSynchronizer::owner_self) { 813 counter->inc(); 814 } 815 } 816 817 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 818 // and JVM_DefineClassWithSourceCond() 819 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 820 jobject loader, const jbyte *buf, 821 jsize len, jobject pd, const char *source, 822 jboolean verify, TRAPS) { 823 if (source == NULL) source = "__JVM_DefineClass__"; 824 825 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 826 JavaThread* jt = (JavaThread*) THREAD; 827 828 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 829 ClassLoader::perf_define_appclass_selftime(), 830 ClassLoader::perf_define_appclasses(), 831 jt->get_thread_stat()->perf_recursion_counts_addr(), 832 jt->get_thread_stat()->perf_timers_addr(), 833 PerfClassTraceTime::DEFINE_CLASS); 834 835 if (UsePerfData) { 836 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 837 } 838 839 // Since exceptions can be thrown, class initialization can take place 840 // if name is NULL no check for class name in .class stream has to be made. 841 TempNewSymbol class_name = NULL; 842 if (name != NULL) { 843 const int str_len = (int)strlen(name); 844 if (str_len > Symbol::max_length()) { 845 // It's impossible to create this class; the name cannot fit 846 // into the constant pool. 847 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 848 } 849 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 850 } 851 852 ResourceMark rm(THREAD); 853 ClassFileStream st((u1*) buf, len, (char *)source); 854 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 855 if (UsePerfData) { 856 is_lock_held_by_thread(class_loader, 857 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 858 THREAD); 859 } 860 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 861 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 862 protection_domain, &st, 863 verify != 0, 864 CHECK_NULL); 865 866 if (TraceClassResolution && k != NULL) { 867 trace_class_resolution(k); 868 } 869 870 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 871 } 872 873 874 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 875 JVMWrapper2("JVM_DefineClass %s", name); 876 877 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 878 JVM_END 879 880 881 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 882 JVMWrapper2("JVM_DefineClassWithSource %s", name); 883 884 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 885 JVM_END 886 887 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 888 jobject loader, const jbyte *buf, 889 jsize len, jobject pd, 890 const char *source, jboolean verify)) 891 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 892 893 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 894 JVM_END 895 896 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 897 JVMWrapper("JVM_FindLoadedClass"); 898 ResourceMark rm(THREAD); 899 900 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 901 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 902 903 const char* str = java_lang_String::as_utf8_string(string()); 904 // Sanity check, don't expect null 905 if (str == NULL) return NULL; 906 907 const int str_len = (int)strlen(str); 908 if (str_len > Symbol::max_length()) { 909 // It's impossible to create this class; the name cannot fit 910 // into the constant pool. 911 return NULL; 912 } 913 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 914 915 // Security Note: 916 // The Java level wrapper will perform the necessary security check allowing 917 // us to pass the NULL as the initiating class loader. 918 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 919 if (UsePerfData) { 920 is_lock_held_by_thread(h_loader, 921 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 922 THREAD); 923 } 924 925 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, 926 h_loader, 927 Handle(), 928 CHECK_NULL); 929 930 return (k == NULL) ? NULL : 931 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 932 JVM_END 933 934 935 // Reflection support ////////////////////////////////////////////////////////////////////////////// 936 937 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 938 assert (cls != NULL, "illegal class"); 939 JVMWrapper("JVM_GetClassName"); 940 JvmtiVMObjectAllocEventCollector oam; 941 ResourceMark rm(THREAD); 942 const char* name; 943 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 944 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 945 } else { 946 // Consider caching interned string in Klass 947 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 948 assert(k->is_klass(), "just checking"); 949 name = Klass::cast(k)->external_name(); 950 } 951 oop result = StringTable::intern((char*) name, CHECK_NULL); 952 return (jstring) JNIHandles::make_local(env, result); 953 JVM_END 954 955 956 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 957 JVMWrapper("JVM_GetClassInterfaces"); 958 JvmtiVMObjectAllocEventCollector oam; 959 oop mirror = JNIHandles::resolve_non_null(cls); 960 961 // Special handling for primitive objects 962 if (java_lang_Class::is_primitive(mirror)) { 963 // Primitive objects does not have any interfaces 964 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 965 return (jobjectArray) JNIHandles::make_local(env, r); 966 } 967 968 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); 969 // Figure size of result array 970 int size; 971 if (klass->oop_is_instance()) { 972 size = instanceKlass::cast(klass())->local_interfaces()->length(); 973 } else { 974 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 975 size = 2; 976 } 977 978 // Allocate result array 979 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 980 objArrayHandle result (THREAD, r); 981 // Fill in result 982 if (klass->oop_is_instance()) { 983 // Regular instance klass, fill in all local interfaces 984 for (int index = 0; index < size; index++) { 985 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); 986 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 987 } 988 } else { 989 // All arrays implement java.lang.Cloneable and java.io.Serializable 990 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); 991 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); 992 } 993 return (jobjectArray) JNIHandles::make_local(env, result()); 994 JVM_END 995 996 997 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 998 JVMWrapper("JVM_GetClassLoader"); 999 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1000 return NULL; 1001 } 1002 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1003 oop loader = Klass::cast(k)->class_loader(); 1004 return JNIHandles::make_local(env, loader); 1005 JVM_END 1006 1007 1008 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1009 JVMWrapper("JVM_IsInterface"); 1010 oop mirror = JNIHandles::resolve_non_null(cls); 1011 if (java_lang_Class::is_primitive(mirror)) { 1012 return JNI_FALSE; 1013 } 1014 klassOop k = java_lang_Class::as_klassOop(mirror); 1015 jboolean result = Klass::cast(k)->is_interface(); 1016 assert(!result || Klass::cast(k)->oop_is_instance(), 1017 "all interfaces are instance types"); 1018 // The compiler intrinsic for isInterface tests the 1019 // Klass::_access_flags bits in the same way. 1020 return result; 1021 JVM_END 1022 1023 1024 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1025 JVMWrapper("JVM_GetClassSigners"); 1026 JvmtiVMObjectAllocEventCollector oam; 1027 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1028 // There are no signers for primitive types 1029 return NULL; 1030 } 1031 1032 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1033 objArrayOop signers = NULL; 1034 if (Klass::cast(k)->oop_is_instance()) { 1035 signers = instanceKlass::cast(k)->signers(); 1036 } 1037 1038 // If there are no signers set in the class, or if the class 1039 // is an array, return NULL. 1040 if (signers == NULL) return NULL; 1041 1042 // copy of the signers array 1043 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); 1044 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1045 for (int index = 0; index < signers->length(); index++) { 1046 signers_copy->obj_at_put(index, signers->obj_at(index)); 1047 } 1048 1049 // return the copy 1050 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1051 JVM_END 1052 1053 1054 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1055 JVMWrapper("JVM_SetClassSigners"); 1056 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1057 // This call is ignored for primitive types and arrays. 1058 // Signers are only set once, ClassLoader.java, and thus shouldn't 1059 // be called with an array. Only the bootstrap loader creates arrays. 1060 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1061 if (Klass::cast(k)->oop_is_instance()) { 1062 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1063 } 1064 } 1065 JVM_END 1066 1067 1068 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1069 JVMWrapper("JVM_GetProtectionDomain"); 1070 if (JNIHandles::resolve(cls) == NULL) { 1071 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1072 } 1073 1074 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1075 // Primitive types does not have a protection domain. 1076 return NULL; 1077 } 1078 1079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1080 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 1081 JVM_END 1082 1083 1084 // Obsolete since 1.2 (Class.setProtectionDomain removed), although 1085 // still defined in core libraries as of 1.5. 1086 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1087 JVMWrapper("JVM_SetProtectionDomain"); 1088 if (JNIHandles::resolve(cls) == NULL) { 1089 THROW(vmSymbols::java_lang_NullPointerException()); 1090 } 1091 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1092 // Call is ignored for primitive types 1093 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1094 1095 // cls won't be an array, as this called only from ClassLoader.defineClass 1096 if (Klass::cast(k)->oop_is_instance()) { 1097 oop pd = JNIHandles::resolve(protection_domain); 1098 assert(pd == NULL || pd->is_oop(), "just checking"); 1099 instanceKlass::cast(k)->set_protection_domain(pd); 1100 } 1101 } 1102 JVM_END 1103 1104 1105 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1106 JVMWrapper("JVM_DoPrivileged"); 1107 1108 if (action == NULL) { 1109 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1110 } 1111 1112 // Stack allocated list of privileged stack elements 1113 PrivilegedElement pi; 1114 1115 // Check that action object understands "Object run()" 1116 Handle object (THREAD, JNIHandles::resolve(action)); 1117 1118 // get run() method 1119 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1120 vmSymbols::run_method_name(), 1121 vmSymbols::void_object_signature()); 1122 methodHandle m (THREAD, m_oop); 1123 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { 1124 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1125 } 1126 1127 // Compute the frame initiating the do privileged operation and setup the privileged stack 1128 vframeStream vfst(thread); 1129 vfst.security_get_caller_frame(1); 1130 1131 if (!vfst.at_end()) { 1132 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1133 thread->set_privileged_stack_top(&pi); 1134 } 1135 1136 1137 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1138 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1139 Handle pending_exception; 1140 JavaValue result(T_OBJECT); 1141 JavaCallArguments args(object); 1142 JavaCalls::call(&result, m, &args, THREAD); 1143 1144 // done with action, remove ourselves from the list 1145 if (!vfst.at_end()) { 1146 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1147 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1148 } 1149 1150 if (HAS_PENDING_EXCEPTION) { 1151 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1152 CLEAR_PENDING_EXCEPTION; 1153 1154 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1155 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1156 // Throw a java.security.PrivilegedActionException(Exception e) exception 1157 JavaCallArguments args(pending_exception); 1158 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1159 vmSymbols::exception_void_signature(), 1160 &args); 1161 } 1162 } 1163 1164 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1165 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1166 JVM_END 1167 1168 1169 // Returns the inherited_access_control_context field of the running thread. 1170 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1171 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1172 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1173 return JNIHandles::make_local(env, result); 1174 JVM_END 1175 1176 class RegisterArrayForGC { 1177 private: 1178 JavaThread *_thread; 1179 public: 1180 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1181 _thread = thread; 1182 _thread->register_array_for_gc(array); 1183 } 1184 1185 ~RegisterArrayForGC() { 1186 _thread->register_array_for_gc(NULL); 1187 } 1188 }; 1189 1190 1191 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1192 JVMWrapper("JVM_GetStackAccessControlContext"); 1193 if (!UsePrivilegedStack) return NULL; 1194 1195 ResourceMark rm(THREAD); 1196 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1197 JvmtiVMObjectAllocEventCollector oam; 1198 1199 // count the protection domains on the execution stack. We collapse 1200 // duplicate consecutive protection domains into a single one, as 1201 // well as stopping when we hit a privileged frame. 1202 1203 // Use vframeStream to iterate through Java frames 1204 vframeStream vfst(thread); 1205 1206 oop previous_protection_domain = NULL; 1207 Handle privileged_context(thread, NULL); 1208 bool is_privileged = false; 1209 oop protection_domain = NULL; 1210 1211 for(; !vfst.at_end(); vfst.next()) { 1212 // get method of frame 1213 methodOop method = vfst.method(); 1214 intptr_t* frame_id = vfst.frame_id(); 1215 1216 // check the privileged frames to see if we have a match 1217 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1218 // this frame is privileged 1219 is_privileged = true; 1220 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1221 protection_domain = thread->privileged_stack_top()->protection_domain(); 1222 } else { 1223 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 1224 } 1225 1226 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1227 local_array->push(protection_domain); 1228 previous_protection_domain = protection_domain; 1229 } 1230 1231 if (is_privileged) break; 1232 } 1233 1234 1235 // either all the domains on the stack were system domains, or 1236 // we had a privileged system domain 1237 if (local_array->is_empty()) { 1238 if (is_privileged && privileged_context.is_null()) return NULL; 1239 1240 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1241 return JNIHandles::make_local(env, result); 1242 } 1243 1244 // the resource area must be registered in case of a gc 1245 RegisterArrayForGC ragc(thread, local_array); 1246 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1247 local_array->length(), CHECK_NULL); 1248 objArrayHandle h_context(thread, context); 1249 for (int index = 0; index < local_array->length(); index++) { 1250 h_context->obj_at_put(index, local_array->at(index)); 1251 } 1252 1253 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1254 1255 return JNIHandles::make_local(env, result); 1256 JVM_END 1257 1258 1259 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1260 JVMWrapper("JVM_IsArrayClass"); 1261 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1262 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; 1263 JVM_END 1264 1265 1266 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1267 JVMWrapper("JVM_IsPrimitiveClass"); 1268 oop mirror = JNIHandles::resolve_non_null(cls); 1269 return (jboolean) java_lang_Class::is_primitive(mirror); 1270 JVM_END 1271 1272 1273 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1274 JVMWrapper("JVM_GetComponentType"); 1275 oop mirror = JNIHandles::resolve_non_null(cls); 1276 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1277 return (jclass) JNIHandles::make_local(env, result); 1278 JVM_END 1279 1280 1281 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1282 JVMWrapper("JVM_GetClassModifiers"); 1283 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1284 // Primitive type 1285 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1286 } 1287 1288 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1289 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1290 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1291 return k->modifier_flags(); 1292 JVM_END 1293 1294 1295 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1296 1297 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1298 const int inner_class_info_index = 0; 1299 const int outer_class_info_index = 1; 1300 1301 JvmtiVMObjectAllocEventCollector oam; 1302 // ofClass is a reference to a java_lang_Class object. The mirror object 1303 // of an instanceKlass 1304 1305 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1306 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1307 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1308 return (jobjectArray)JNIHandles::make_local(env, result); 1309 } 1310 1311 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1312 1313 if (k->inner_classes()->length() == 0) { 1314 // Neither an inner nor outer class 1315 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1316 return (jobjectArray)JNIHandles::make_local(env, result); 1317 } 1318 1319 // find inner class info 1320 typeArrayHandle icls(thread, k->inner_classes()); 1321 constantPoolHandle cp(thread, k->constants()); 1322 int length = icls->length(); 1323 1324 // Allocate temp. result array 1325 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1326 objArrayHandle result (THREAD, r); 1327 int members = 0; 1328 1329 for(int i = 0; i < length; i += 4) { 1330 int ioff = icls->ushort_at(i + inner_class_info_index); 1331 int ooff = icls->ushort_at(i + outer_class_info_index); 1332 1333 if (ioff != 0 && ooff != 0) { 1334 // Check to see if the name matches the class we're looking for 1335 // before attempting to find the class. 1336 if (cp->klass_name_at_matches(k, ooff)) { 1337 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); 1338 if (outer_klass == k()) { 1339 klassOop ik = cp->klass_at(ioff, CHECK_NULL); 1340 instanceKlassHandle inner_klass (THREAD, ik); 1341 1342 // Throws an exception if outer klass has not declared k as 1343 // an inner klass 1344 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1345 1346 result->obj_at_put(members, inner_klass->java_mirror()); 1347 members++; 1348 } 1349 } 1350 } 1351 } 1352 1353 if (members != length) { 1354 // Return array of right length 1355 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1356 for(int i = 0; i < members; i++) { 1357 res->obj_at_put(i, result->obj_at(i)); 1358 } 1359 return (jobjectArray)JNIHandles::make_local(env, res); 1360 } 1361 1362 return (jobjectArray)JNIHandles::make_local(env, result()); 1363 JVM_END 1364 1365 1366 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1367 { 1368 // ofClass is a reference to a java_lang_Class object. 1369 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1370 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1371 return NULL; 1372 } 1373 1374 bool inner_is_member = false; 1375 klassOop outer_klass 1376 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) 1377 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1378 if (outer_klass == NULL) return NULL; // already a top-level class 1379 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1380 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); 1381 } 1382 JVM_END 1383 1384 // should be in instanceKlass.cpp, but is here for historical reasons 1385 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1386 bool* inner_is_member, 1387 TRAPS) { 1388 Thread* thread = THREAD; 1389 const int inner_class_info_index = inner_class_inner_class_info_offset; 1390 const int outer_class_info_index = inner_class_outer_class_info_offset; 1391 1392 if (k->inner_classes()->length() == 0) { 1393 // No inner class info => no declaring class 1394 return NULL; 1395 } 1396 1397 typeArrayHandle i_icls(thread, k->inner_classes()); 1398 constantPoolHandle i_cp(thread, k->constants()); 1399 int i_length = i_icls->length(); 1400 1401 bool found = false; 1402 klassOop ok; 1403 instanceKlassHandle outer_klass; 1404 *inner_is_member = false; 1405 1406 // Find inner_klass attribute 1407 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) { 1408 int ioff = i_icls->ushort_at(i + inner_class_info_index); 1409 int ooff = i_icls->ushort_at(i + outer_class_info_index); 1410 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset); 1411 if (ioff != 0) { 1412 // Check to see if the name matches the class we're looking for 1413 // before attempting to find the class. 1414 if (i_cp->klass_name_at_matches(k, ioff)) { 1415 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1416 found = (k() == inner_klass); 1417 if (found && ooff != 0) { 1418 ok = i_cp->klass_at(ooff, CHECK_NULL); 1419 outer_klass = instanceKlassHandle(thread, ok); 1420 *inner_is_member = true; 1421 } 1422 } 1423 } 1424 } 1425 1426 if (found && outer_klass.is_null()) { 1427 // It may be anonymous; try for that. 1428 int encl_method_class_idx = k->enclosing_method_class_index(); 1429 if (encl_method_class_idx != 0) { 1430 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1431 outer_klass = instanceKlassHandle(thread, ok); 1432 *inner_is_member = false; 1433 } 1434 } 1435 1436 // If no inner class attribute found for this class. 1437 if (outer_klass.is_null()) return NULL; 1438 1439 // Throws an exception if outer klass has not declared k as an inner klass 1440 // We need evidence that each klass knows about the other, or else 1441 // the system could allow a spoof of an inner class to gain access rights. 1442 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1443 return outer_klass(); 1444 } 1445 1446 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1447 assert (cls != NULL, "illegal class"); 1448 JVMWrapper("JVM_GetClassSignature"); 1449 JvmtiVMObjectAllocEventCollector oam; 1450 ResourceMark rm(THREAD); 1451 // Return null for arrays and primatives 1452 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1453 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1454 if (Klass::cast(k)->oop_is_instance()) { 1455 Symbol* sym = instanceKlass::cast(k)->generic_signature(); 1456 if (sym == NULL) return NULL; 1457 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1458 return (jstring) JNIHandles::make_local(env, str()); 1459 } 1460 } 1461 return NULL; 1462 JVM_END 1463 1464 1465 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1466 assert (cls != NULL, "illegal class"); 1467 JVMWrapper("JVM_GetClassAnnotations"); 1468 ResourceMark rm(THREAD); 1469 // Return null for arrays and primitives 1470 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1471 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1472 if (Klass::cast(k)->oop_is_instance()) { 1473 return (jbyteArray) JNIHandles::make_local(env, 1474 instanceKlass::cast(k)->class_annotations()); 1475 } 1476 } 1477 return NULL; 1478 JVM_END 1479 1480 1481 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1482 assert(field != NULL, "illegal field"); 1483 JVMWrapper("JVM_GetFieldAnnotations"); 1484 1485 // some of this code was adapted from from jni_FromReflectedField 1486 1487 // field is a handle to a java.lang.reflect.Field object 1488 oop reflected = JNIHandles::resolve_non_null(field); 1489 oop mirror = java_lang_reflect_Field::clazz(reflected); 1490 klassOop k = java_lang_Class::as_klassOop(mirror); 1491 int slot = java_lang_reflect_Field::slot(reflected); 1492 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1493 1494 fieldDescriptor fd; 1495 KlassHandle kh(THREAD, k); 1496 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); 1497 1498 if (modifiers & JVM_ACC_STATIC) { 1499 // for static fields we only look in the current class 1500 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, 1501 true, &fd)) { 1502 assert(false, "cannot find static field"); 1503 return NULL; // robustness 1504 } 1505 } else { 1506 // for instance fields we start with the current class and work 1507 // our way up through the superclass chain 1508 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, 1509 &fd)) { 1510 assert(false, "cannot find instance field"); 1511 return NULL; // robustness 1512 } 1513 } 1514 1515 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); 1516 JVM_END 1517 1518 1519 static methodOop jvm_get_method_common(jobject method, TRAPS) { 1520 // some of this code was adapted from from jni_FromReflectedMethod 1521 1522 oop reflected = JNIHandles::resolve_non_null(method); 1523 oop mirror = NULL; 1524 int slot = 0; 1525 1526 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1527 mirror = java_lang_reflect_Constructor::clazz(reflected); 1528 slot = java_lang_reflect_Constructor::slot(reflected); 1529 } else { 1530 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1531 "wrong type"); 1532 mirror = java_lang_reflect_Method::clazz(reflected); 1533 slot = java_lang_reflect_Method::slot(reflected); 1534 } 1535 klassOop k = java_lang_Class::as_klassOop(mirror); 1536 1537 KlassHandle kh(THREAD, k); 1538 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); 1539 if (m == NULL) { 1540 assert(false, "cannot find method"); 1541 return NULL; // robustness 1542 } 1543 1544 return m; 1545 } 1546 1547 1548 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1549 JVMWrapper("JVM_GetMethodAnnotations"); 1550 1551 // method is a handle to a java.lang.reflect.Method object 1552 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1553 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); 1554 JVM_END 1555 1556 1557 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1558 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1559 1560 // method is a handle to a java.lang.reflect.Method object 1561 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1562 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); 1563 JVM_END 1564 1565 1566 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1567 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1568 1569 // method is a handle to a java.lang.reflect.Method object 1570 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1571 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); 1572 JVM_END 1573 1574 1575 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1576 1577 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1578 { 1579 JVMWrapper("JVM_GetClassDeclaredFields"); 1580 JvmtiVMObjectAllocEventCollector oam; 1581 1582 // Exclude primitive types and array types 1583 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1584 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1585 // Return empty array 1586 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1587 return (jobjectArray) JNIHandles::make_local(env, res); 1588 } 1589 1590 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1591 constantPoolHandle cp(THREAD, k->constants()); 1592 1593 // Ensure class is linked 1594 k->link_class(CHECK_NULL); 1595 1596 typeArrayHandle fields(THREAD, k->fields()); 1597 int fields_len = fields->length(); 1598 1599 // 4496456 We need to filter out java.lang.Throwable.backtrace 1600 bool skip_backtrace = false; 1601 1602 // Allocate result 1603 int num_fields; 1604 1605 if (publicOnly) { 1606 num_fields = 0; 1607 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { 1608 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1609 if (mods & JVM_ACC_PUBLIC) ++num_fields; 1610 } 1611 } else { 1612 num_fields = fields_len / instanceKlass::next_offset; 1613 1614 if (k() == SystemDictionary::Throwable_klass()) { 1615 num_fields--; 1616 skip_backtrace = true; 1617 } 1618 } 1619 1620 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1621 objArrayHandle result (THREAD, r); 1622 1623 int out_idx = 0; 1624 fieldDescriptor fd; 1625 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { 1626 if (skip_backtrace) { 1627 // 4496456 skip java.lang.Throwable.backtrace 1628 int offset = k->offset_from_fields(i); 1629 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1630 } 1631 1632 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1633 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { 1634 fd.initialize(k(), i); 1635 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1636 result->obj_at_put(out_idx, field); 1637 ++out_idx; 1638 } 1639 } 1640 assert(out_idx == num_fields, "just checking"); 1641 return (jobjectArray) JNIHandles::make_local(env, result()); 1642 } 1643 JVM_END 1644 1645 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1646 { 1647 JVMWrapper("JVM_GetClassDeclaredMethods"); 1648 JvmtiVMObjectAllocEventCollector oam; 1649 1650 // Exclude primitive types and array types 1651 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1652 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1653 // Return empty array 1654 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1655 return (jobjectArray) JNIHandles::make_local(env, res); 1656 } 1657 1658 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1659 1660 // Ensure class is linked 1661 k->link_class(CHECK_NULL); 1662 1663 objArrayHandle methods (THREAD, k->methods()); 1664 int methods_length = methods->length(); 1665 int num_methods = 0; 1666 1667 int i; 1668 for (i = 0; i < methods_length; i++) { 1669 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1670 if (!method->is_initializer()) { 1671 if (!publicOnly || method->is_public()) { 1672 ++num_methods; 1673 } 1674 } 1675 } 1676 1677 // Allocate result 1678 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1679 objArrayHandle result (THREAD, r); 1680 1681 int out_idx = 0; 1682 for (i = 0; i < methods_length; i++) { 1683 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1684 if (!method->is_initializer()) { 1685 if (!publicOnly || method->is_public()) { 1686 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1687 result->obj_at_put(out_idx, m); 1688 ++out_idx; 1689 } 1690 } 1691 } 1692 assert(out_idx == num_methods, "just checking"); 1693 return (jobjectArray) JNIHandles::make_local(env, result()); 1694 } 1695 JVM_END 1696 1697 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1698 { 1699 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1700 JvmtiVMObjectAllocEventCollector oam; 1701 1702 // Exclude primitive types and array types 1703 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1704 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1705 // Return empty array 1706 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1707 return (jobjectArray) JNIHandles::make_local(env, res); 1708 } 1709 1710 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1711 1712 // Ensure class is linked 1713 k->link_class(CHECK_NULL); 1714 1715 objArrayHandle methods (THREAD, k->methods()); 1716 int methods_length = methods->length(); 1717 int num_constructors = 0; 1718 1719 int i; 1720 for (i = 0; i < methods_length; i++) { 1721 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1722 if (method->is_initializer() && !method->is_static()) { 1723 if (!publicOnly || method->is_public()) { 1724 ++num_constructors; 1725 } 1726 } 1727 } 1728 1729 // Allocate result 1730 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1731 objArrayHandle result(THREAD, r); 1732 1733 int out_idx = 0; 1734 for (i = 0; i < methods_length; i++) { 1735 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1736 if (method->is_initializer() && !method->is_static()) { 1737 if (!publicOnly || method->is_public()) { 1738 oop m = Reflection::new_constructor(method, CHECK_NULL); 1739 result->obj_at_put(out_idx, m); 1740 ++out_idx; 1741 } 1742 } 1743 } 1744 assert(out_idx == num_constructors, "just checking"); 1745 return (jobjectArray) JNIHandles::make_local(env, result()); 1746 } 1747 JVM_END 1748 1749 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1750 { 1751 JVMWrapper("JVM_GetClassAccessFlags"); 1752 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1753 // Primitive type 1754 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1755 } 1756 1757 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1758 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1759 } 1760 JVM_END 1761 1762 1763 // Constant pool access ////////////////////////////////////////////////////////// 1764 1765 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1766 { 1767 JVMWrapper("JVM_GetClassConstantPool"); 1768 JvmtiVMObjectAllocEventCollector oam; 1769 1770 // Return null for primitives and arrays 1771 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1772 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1773 if (Klass::cast(k)->oop_is_instance()) { 1774 instanceKlassHandle k_h(THREAD, k); 1775 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1776 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); 1777 return JNIHandles::make_local(jcp()); 1778 } 1779 } 1780 return NULL; 1781 } 1782 JVM_END 1783 1784 1785 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) 1786 { 1787 JVMWrapper("JVM_ConstantPoolGetSize"); 1788 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1789 return cp->length(); 1790 } 1791 JVM_END 1792 1793 1794 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1795 if (!cp->is_within_bounds(index)) { 1796 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1797 } 1798 } 1799 1800 1801 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1802 { 1803 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1804 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1805 bounds_check(cp, index, CHECK_NULL); 1806 constantTag tag = cp->tag_at(index); 1807 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1808 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1809 } 1810 klassOop k = cp->klass_at(index, CHECK_NULL); 1811 return (jclass) JNIHandles::make_local(k->java_mirror()); 1812 } 1813 JVM_END 1814 1815 1816 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1817 { 1818 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1819 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1820 bounds_check(cp, index, CHECK_NULL); 1821 constantTag tag = cp->tag_at(index); 1822 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1823 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1824 } 1825 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); 1826 if (k == NULL) return NULL; 1827 return (jclass) JNIHandles::make_local(k->java_mirror()); 1828 } 1829 JVM_END 1830 1831 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1832 constantTag tag = cp->tag_at(index); 1833 if (!tag.is_method() && !tag.is_interface_method()) { 1834 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1835 } 1836 int klass_ref = cp->uncached_klass_ref_index_at(index); 1837 klassOop k_o; 1838 if (force_resolution) { 1839 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1840 } else { 1841 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1842 if (k_o == NULL) return NULL; 1843 } 1844 instanceKlassHandle k(THREAD, k_o); 1845 Symbol* name = cp->uncached_name_ref_at(index); 1846 Symbol* sig = cp->uncached_signature_ref_at(index); 1847 methodHandle m (THREAD, k->find_method(name, sig)); 1848 if (m.is_null()) { 1849 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1850 } 1851 oop method; 1852 if (!m->is_initializer() || m->is_static()) { 1853 method = Reflection::new_method(m, true, true, CHECK_NULL); 1854 } else { 1855 method = Reflection::new_constructor(m, CHECK_NULL); 1856 } 1857 return JNIHandles::make_local(method); 1858 } 1859 1860 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1861 { 1862 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1863 JvmtiVMObjectAllocEventCollector oam; 1864 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1865 bounds_check(cp, index, CHECK_NULL); 1866 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1867 return res; 1868 } 1869 JVM_END 1870 1871 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1872 { 1873 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1874 JvmtiVMObjectAllocEventCollector oam; 1875 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1876 bounds_check(cp, index, CHECK_NULL); 1877 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1878 return res; 1879 } 1880 JVM_END 1881 1882 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1883 constantTag tag = cp->tag_at(index); 1884 if (!tag.is_field()) { 1885 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1886 } 1887 int klass_ref = cp->uncached_klass_ref_index_at(index); 1888 klassOop k_o; 1889 if (force_resolution) { 1890 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1891 } else { 1892 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1893 if (k_o == NULL) return NULL; 1894 } 1895 instanceKlassHandle k(THREAD, k_o); 1896 Symbol* name = cp->uncached_name_ref_at(index); 1897 Symbol* sig = cp->uncached_signature_ref_at(index); 1898 fieldDescriptor fd; 1899 klassOop target_klass = k->find_field(name, sig, &fd); 1900 if (target_klass == NULL) { 1901 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1902 } 1903 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1904 return JNIHandles::make_local(field); 1905 } 1906 1907 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1908 { 1909 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1910 JvmtiVMObjectAllocEventCollector oam; 1911 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1912 bounds_check(cp, index, CHECK_NULL); 1913 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1914 return res; 1915 } 1916 JVM_END 1917 1918 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1919 { 1920 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1921 JvmtiVMObjectAllocEventCollector oam; 1922 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1923 bounds_check(cp, index, CHECK_NULL); 1924 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1925 return res; 1926 } 1927 JVM_END 1928 1929 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1930 { 1931 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1932 JvmtiVMObjectAllocEventCollector oam; 1933 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1934 bounds_check(cp, index, CHECK_NULL); 1935 constantTag tag = cp->tag_at(index); 1936 if (!tag.is_field_or_method()) { 1937 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1938 } 1939 int klass_ref = cp->uncached_klass_ref_index_at(index); 1940 Symbol* klass_name = cp->klass_name_at(klass_ref); 1941 Symbol* member_name = cp->uncached_name_ref_at(index); 1942 Symbol* member_sig = cp->uncached_signature_ref_at(index); 1943 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 1944 objArrayHandle dest(THREAD, dest_o); 1945 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1946 dest->obj_at_put(0, str()); 1947 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1948 dest->obj_at_put(1, str()); 1949 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1950 dest->obj_at_put(2, str()); 1951 return (jobjectArray) JNIHandles::make_local(dest()); 1952 } 1953 JVM_END 1954 1955 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1956 { 1957 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1958 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1959 bounds_check(cp, index, CHECK_0); 1960 constantTag tag = cp->tag_at(index); 1961 if (!tag.is_int()) { 1962 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1963 } 1964 return cp->int_at(index); 1965 } 1966 JVM_END 1967 1968 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1969 { 1970 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1971 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1972 bounds_check(cp, index, CHECK_(0L)); 1973 constantTag tag = cp->tag_at(index); 1974 if (!tag.is_long()) { 1975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1976 } 1977 return cp->long_at(index); 1978 } 1979 JVM_END 1980 1981 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1982 { 1983 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1984 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1985 bounds_check(cp, index, CHECK_(0.0f)); 1986 constantTag tag = cp->tag_at(index); 1987 if (!tag.is_float()) { 1988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1989 } 1990 return cp->float_at(index); 1991 } 1992 JVM_END 1993 1994 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1995 { 1996 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 1997 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1998 bounds_check(cp, index, CHECK_(0.0)); 1999 constantTag tag = cp->tag_at(index); 2000 if (!tag.is_double()) { 2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2002 } 2003 return cp->double_at(index); 2004 } 2005 JVM_END 2006 2007 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 2008 { 2009 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2010 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 2011 bounds_check(cp, index, CHECK_NULL); 2012 constantTag tag = cp->tag_at(index); 2013 if (!tag.is_string() && !tag.is_unresolved_string()) { 2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2015 } 2016 oop str = cp->string_at(index, CHECK_NULL); 2017 return (jstring) JNIHandles::make_local(str); 2018 } 2019 JVM_END 2020 2021 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 2022 { 2023 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2024 JvmtiVMObjectAllocEventCollector oam; 2025 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 2026 bounds_check(cp, index, CHECK_NULL); 2027 constantTag tag = cp->tag_at(index); 2028 if (!tag.is_symbol()) { 2029 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2030 } 2031 Symbol* sym = cp->symbol_at(index); 2032 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2033 return (jstring) JNIHandles::make_local(str()); 2034 } 2035 JVM_END 2036 2037 2038 // Assertion support. ////////////////////////////////////////////////////////// 2039 2040 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2041 JVMWrapper("JVM_DesiredAssertionStatus"); 2042 assert(cls != NULL, "bad class"); 2043 2044 oop r = JNIHandles::resolve(cls); 2045 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2046 if (java_lang_Class::is_primitive(r)) return false; 2047 2048 klassOop k = java_lang_Class::as_klassOop(r); 2049 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 2050 if (! Klass::cast(k)->oop_is_instance()) return false; 2051 2052 ResourceMark rm(THREAD); 2053 const char* name = Klass::cast(k)->name()->as_C_string(); 2054 bool system_class = Klass::cast(k)->class_loader() == NULL; 2055 return JavaAssertions::enabled(name, system_class); 2056 2057 JVM_END 2058 2059 2060 // Return a new AssertionStatusDirectives object with the fields filled in with 2061 // command-line assertion arguments (i.e., -ea, -da). 2062 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2063 JVMWrapper("JVM_AssertionStatusDirectives"); 2064 JvmtiVMObjectAllocEventCollector oam; 2065 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2066 return JNIHandles::make_local(env, asd); 2067 JVM_END 2068 2069 // Verification //////////////////////////////////////////////////////////////////////////////// 2070 2071 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2072 2073 // RedefineClasses support: bug 6214132 caused verification to fail. 2074 // All functions from this section should call the jvmtiThreadSate function: 2075 // klassOop class_to_verify_considering_redefinition(klassOop klass). 2076 // The function returns a klassOop of the _scratch_class if the verifier 2077 // was invoked in the middle of the class redefinition. 2078 // Otherwise it returns its argument value which is the _the_class klassOop. 2079 // Please, refer to the description in the jvmtiThreadSate.hpp. 2080 2081 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2082 JVMWrapper("JVM_GetClassNameUTF"); 2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2085 return Klass::cast(k)->name()->as_utf8(); 2086 JVM_END 2087 2088 2089 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2090 JVMWrapper("JVM_GetClassCPTypes"); 2091 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2092 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2093 // types will have length zero if this is not an instanceKlass 2094 // (length is determined by call to JVM_GetClassCPEntriesCount) 2095 if (Klass::cast(k)->oop_is_instance()) { 2096 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2097 for (int index = cp->length() - 1; index >= 0; index--) { 2098 constantTag tag = cp->tag_at(index); 2099 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : 2100 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); 2101 } 2102 } 2103 JVM_END 2104 2105 2106 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2107 JVMWrapper("JVM_GetClassCPEntriesCount"); 2108 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2109 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2110 if (!Klass::cast(k)->oop_is_instance()) 2111 return 0; 2112 return instanceKlass::cast(k)->constants()->length(); 2113 JVM_END 2114 2115 2116 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2117 JVMWrapper("JVM_GetClassFieldsCount"); 2118 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2119 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2120 if (!Klass::cast(k)->oop_is_instance()) 2121 return 0; 2122 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; 2123 JVM_END 2124 2125 2126 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2127 JVMWrapper("JVM_GetClassMethodsCount"); 2128 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2129 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2130 if (!Klass::cast(k)->oop_is_instance()) 2131 return 0; 2132 return instanceKlass::cast(k)->methods()->length(); 2133 JVM_END 2134 2135 2136 // The following methods, used for the verifier, are never called with 2137 // array klasses, so a direct cast to instanceKlass is safe. 2138 // Typically, these methods are called in a loop with bounds determined 2139 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2140 // zero for arrays. 2141 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2142 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2143 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2144 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2145 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2146 int length = methodOop(method)->checked_exceptions_length(); 2147 if (length > 0) { 2148 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); 2149 for (int i = 0; i < length; i++) { 2150 exceptions[i] = table[i].class_cp_index; 2151 } 2152 } 2153 JVM_END 2154 2155 2156 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2157 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2158 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2159 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2160 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2161 return methodOop(method)->checked_exceptions_length(); 2162 JVM_END 2163 2164 2165 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2166 JVMWrapper("JVM_GetMethodIxByteCode"); 2167 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2168 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2169 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2170 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); 2171 JVM_END 2172 2173 2174 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2175 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2176 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2177 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2178 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2179 return methodOop(method)->code_size(); 2180 JVM_END 2181 2182 2183 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2184 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2185 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2186 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2187 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2188 typeArrayOop extable = methodOop(method)->exception_table(); 2189 entry->start_pc = extable->int_at(entry_index * 4); 2190 entry->end_pc = extable->int_at(entry_index * 4 + 1); 2191 entry->handler_pc = extable->int_at(entry_index * 4 + 2); 2192 entry->catchType = extable->int_at(entry_index * 4 + 3); 2193 JVM_END 2194 2195 2196 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2197 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2198 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2199 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2200 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2201 return methodOop(method)->exception_table()->length() / 4; 2202 JVM_END 2203 2204 2205 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2206 JVMWrapper("JVM_GetMethodIxModifiers"); 2207 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2208 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2209 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2210 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2211 JVM_END 2212 2213 2214 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2215 JVMWrapper("JVM_GetFieldIxModifiers"); 2216 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2217 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2218 typeArrayOop fields = instanceKlass::cast(k)->fields(); 2219 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2220 JVM_END 2221 2222 2223 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2224 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2225 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2226 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2227 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2228 return methodOop(method)->max_locals(); 2229 JVM_END 2230 2231 2232 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2233 JVMWrapper("JVM_GetMethodIxArgsSize"); 2234 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2235 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2236 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2237 return methodOop(method)->size_of_parameters(); 2238 JVM_END 2239 2240 2241 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2242 JVMWrapper("JVM_GetMethodIxMaxStack"); 2243 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2244 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2245 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2246 return methodOop(method)->max_stack(); 2247 JVM_END 2248 2249 2250 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2251 JVMWrapper("JVM_IsConstructorIx"); 2252 ResourceMark rm(THREAD); 2253 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2255 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2256 return methodOop(method)->name() == vmSymbols::object_initializer_name(); 2257 JVM_END 2258 2259 2260 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2261 JVMWrapper("JVM_GetMethodIxIxUTF"); 2262 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2264 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2265 return methodOop(method)->name()->as_utf8(); 2266 JVM_END 2267 2268 2269 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2270 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2271 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2272 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2273 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2274 return methodOop(method)->signature()->as_utf8(); 2275 JVM_END 2276 2277 /** 2278 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2279 * read entries in the constant pool. Since the old verifier always 2280 * works on a copy of the code, it will not see any rewriting that 2281 * may possibly occur in the middle of verification. So it is important 2282 * that nothing it calls tries to use the cpCache instead of the raw 2283 * constant pool, so we must use cp->uncached_x methods when appropriate. 2284 */ 2285 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2286 JVMWrapper("JVM_GetCPFieldNameUTF"); 2287 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2289 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2290 switch (cp->tag_at(cp_index).value()) { 2291 case JVM_CONSTANT_Fieldref: 2292 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2293 default: 2294 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2295 } 2296 ShouldNotReachHere(); 2297 return NULL; 2298 JVM_END 2299 2300 2301 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2302 JVMWrapper("JVM_GetCPMethodNameUTF"); 2303 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2305 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2306 switch (cp->tag_at(cp_index).value()) { 2307 case JVM_CONSTANT_InterfaceMethodref: 2308 case JVM_CONSTANT_Methodref: 2309 case JVM_CONSTANT_NameAndType: // for invokedynamic 2310 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2311 default: 2312 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2313 } 2314 ShouldNotReachHere(); 2315 return NULL; 2316 JVM_END 2317 2318 2319 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2320 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2321 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2323 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2324 switch (cp->tag_at(cp_index).value()) { 2325 case JVM_CONSTANT_InterfaceMethodref: 2326 case JVM_CONSTANT_Methodref: 2327 case JVM_CONSTANT_NameAndType: // for invokedynamic 2328 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2329 default: 2330 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2331 } 2332 ShouldNotReachHere(); 2333 return NULL; 2334 JVM_END 2335 2336 2337 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2338 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2339 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2341 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2342 switch (cp->tag_at(cp_index).value()) { 2343 case JVM_CONSTANT_Fieldref: 2344 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2345 default: 2346 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2347 } 2348 ShouldNotReachHere(); 2349 return NULL; 2350 JVM_END 2351 2352 2353 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2354 JVMWrapper("JVM_GetCPClassNameUTF"); 2355 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2357 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2358 Symbol* classname = cp->klass_name_at(cp_index); 2359 return classname->as_utf8(); 2360 JVM_END 2361 2362 2363 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2364 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2365 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2367 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2368 switch (cp->tag_at(cp_index).value()) { 2369 case JVM_CONSTANT_Fieldref: { 2370 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2371 Symbol* classname = cp->klass_name_at(class_index); 2372 return classname->as_utf8(); 2373 } 2374 default: 2375 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2376 } 2377 ShouldNotReachHere(); 2378 return NULL; 2379 JVM_END 2380 2381 2382 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2383 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2384 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2386 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2387 switch (cp->tag_at(cp_index).value()) { 2388 case JVM_CONSTANT_Methodref: 2389 case JVM_CONSTANT_InterfaceMethodref: { 2390 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2391 Symbol* classname = cp->klass_name_at(class_index); 2392 return classname->as_utf8(); 2393 } 2394 default: 2395 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2396 } 2397 ShouldNotReachHere(); 2398 return NULL; 2399 JVM_END 2400 2401 2402 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2403 JVMWrapper("JVM_GetCPFieldModifiers"); 2404 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2405 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2407 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2408 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2409 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); 2410 switch (cp->tag_at(cp_index).value()) { 2411 case JVM_CONSTANT_Fieldref: { 2412 Symbol* name = cp->uncached_name_ref_at(cp_index); 2413 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2414 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); 2415 int fields_count = fields->length(); 2416 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { 2417 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && 2418 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { 2419 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2420 } 2421 } 2422 return -1; 2423 } 2424 default: 2425 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2426 } 2427 ShouldNotReachHere(); 2428 return 0; 2429 JVM_END 2430 2431 2432 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2433 JVMWrapper("JVM_GetCPMethodModifiers"); 2434 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2435 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2437 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2438 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2439 switch (cp->tag_at(cp_index).value()) { 2440 case JVM_CONSTANT_Methodref: 2441 case JVM_CONSTANT_InterfaceMethodref: { 2442 Symbol* name = cp->uncached_name_ref_at(cp_index); 2443 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2444 objArrayOop methods = instanceKlass::cast(k_called)->methods(); 2445 int methods_count = methods->length(); 2446 for (int i = 0; i < methods_count; i++) { 2447 methodOop method = methodOop(methods->obj_at(i)); 2448 if (method->name() == name && method->signature() == signature) { 2449 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2450 } 2451 } 2452 return -1; 2453 } 2454 default: 2455 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2456 } 2457 ShouldNotReachHere(); 2458 return 0; 2459 JVM_END 2460 2461 2462 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2463 2464 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2465 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2466 JVM_END 2467 2468 2469 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2470 JVMWrapper("JVM_IsSameClassPackage"); 2471 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2472 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2473 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); 2474 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); 2475 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2476 JVM_END 2477 2478 2479 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2480 2481 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2482 JVMWrapper2("JVM_Open (%s)", fname); 2483 2484 //%note jvm_r6 2485 int result = os::open(fname, flags, mode); 2486 if (result >= 0) { 2487 return result; 2488 } else { 2489 switch(errno) { 2490 case EEXIST: 2491 return JVM_EEXIST; 2492 default: 2493 return -1; 2494 } 2495 } 2496 JVM_END 2497 2498 2499 JVM_LEAF(jint, JVM_Close(jint fd)) 2500 JVMWrapper2("JVM_Close (0x%x)", fd); 2501 //%note jvm_r6 2502 return os::close(fd); 2503 JVM_END 2504 2505 2506 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2507 JVMWrapper2("JVM_Read (0x%x)", fd); 2508 2509 //%note jvm_r6 2510 return (jint)os::restartable_read(fd, buf, nbytes); 2511 JVM_END 2512 2513 2514 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2515 JVMWrapper2("JVM_Write (0x%x)", fd); 2516 2517 //%note jvm_r6 2518 return (jint)os::write(fd, buf, nbytes); 2519 JVM_END 2520 2521 2522 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2523 JVMWrapper2("JVM_Available (0x%x)", fd); 2524 //%note jvm_r6 2525 return os::available(fd, pbytes); 2526 JVM_END 2527 2528 2529 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2530 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2531 //%note jvm_r6 2532 return os::lseek(fd, offset, whence); 2533 JVM_END 2534 2535 2536 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2537 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2538 return os::ftruncate(fd, length); 2539 JVM_END 2540 2541 2542 JVM_LEAF(jint, JVM_Sync(jint fd)) 2543 JVMWrapper2("JVM_Sync (0x%x)", fd); 2544 //%note jvm_r6 2545 return os::fsync(fd); 2546 JVM_END 2547 2548 2549 // Printing support ////////////////////////////////////////////////// 2550 extern "C" { 2551 2552 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2553 // see bug 4399518, 4417214 2554 if ((intptr_t)count <= 0) return -1; 2555 return vsnprintf(str, count, fmt, args); 2556 } 2557 2558 2559 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2560 va_list args; 2561 int len; 2562 va_start(args, fmt); 2563 len = jio_vsnprintf(str, count, fmt, args); 2564 va_end(args); 2565 return len; 2566 } 2567 2568 2569 int jio_fprintf(FILE* f, const char *fmt, ...) { 2570 int len; 2571 va_list args; 2572 va_start(args, fmt); 2573 len = jio_vfprintf(f, fmt, args); 2574 va_end(args); 2575 return len; 2576 } 2577 2578 2579 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2580 if (Arguments::vfprintf_hook() != NULL) { 2581 return Arguments::vfprintf_hook()(f, fmt, args); 2582 } else { 2583 return vfprintf(f, fmt, args); 2584 } 2585 } 2586 2587 2588 JNIEXPORT int jio_printf(const char *fmt, ...) { 2589 int len; 2590 va_list args; 2591 va_start(args, fmt); 2592 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2593 va_end(args); 2594 return len; 2595 } 2596 2597 2598 // HotSpot specific jio method 2599 void jio_print(const char* s) { 2600 // Try to make this function as atomic as possible. 2601 if (Arguments::vfprintf_hook() != NULL) { 2602 jio_fprintf(defaultStream::output_stream(), "%s", s); 2603 } else { 2604 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2605 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2606 } 2607 } 2608 2609 } // Extern C 2610 2611 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2612 2613 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2614 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2615 // OSThread objects. The exception to this rule is when the target object is the thread 2616 // doing the operation, in which case we know that the thread won't exit until the 2617 // operation is done (all exits being voluntary). There are a few cases where it is 2618 // rather silly to do operations on yourself, like resuming yourself or asking whether 2619 // you are alive. While these can still happen, they are not subject to deadlocks if 2620 // the lock is held while the operation occurs (this is not the case for suspend, for 2621 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2622 // implementation is local to this file, we always lock Threads_lock for that one. 2623 2624 static void thread_entry(JavaThread* thread, TRAPS) { 2625 HandleMark hm(THREAD); 2626 Handle obj(THREAD, thread->threadObj()); 2627 JavaValue result(T_VOID); 2628 JavaCalls::call_virtual(&result, 2629 obj, 2630 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2631 vmSymbols::run_method_name(), 2632 vmSymbols::void_method_signature(), 2633 THREAD); 2634 } 2635 2636 2637 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2638 JVMWrapper("JVM_StartThread"); 2639 JavaThread *native_thread = NULL; 2640 2641 // We cannot hold the Threads_lock when we throw an exception, 2642 // due to rank ordering issues. Example: we might need to grab the 2643 // Heap_lock while we construct the exception. 2644 bool throw_illegal_thread_state = false; 2645 2646 // We must release the Threads_lock before we can post a jvmti event 2647 // in Thread::start. 2648 { 2649 // Ensure that the C++ Thread and OSThread structures aren't freed before 2650 // we operate. 2651 MutexLocker mu(Threads_lock); 2652 2653 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2654 // re-starting an already started thread, so we should usually find 2655 // that the JavaThread is null. However for a JNI attached thread 2656 // there is a small window between the Thread object being created 2657 // (with its JavaThread set) and the update to its threadStatus, so we 2658 // have to check for this 2659 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2660 throw_illegal_thread_state = true; 2661 } else { 2662 // We could also check the stillborn flag to see if this thread was already stopped, but 2663 // for historical reasons we let the thread detect that itself when it starts running 2664 2665 jlong size = 2666 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2667 // Allocate the C++ Thread structure and create the native thread. The 2668 // stack size retrieved from java is signed, but the constructor takes 2669 // size_t (an unsigned type), so avoid passing negative values which would 2670 // result in really large stacks. 2671 size_t sz = size > 0 ? (size_t) size : 0; 2672 native_thread = new JavaThread(&thread_entry, sz); 2673 2674 // At this point it may be possible that no osthread was created for the 2675 // JavaThread due to lack of memory. Check for this situation and throw 2676 // an exception if necessary. Eventually we may want to change this so 2677 // that we only grab the lock if the thread was created successfully - 2678 // then we can also do this check and throw the exception in the 2679 // JavaThread constructor. 2680 if (native_thread->osthread() != NULL) { 2681 // Note: the current thread is not being used within "prepare". 2682 native_thread->prepare(jthread); 2683 } 2684 } 2685 } 2686 2687 if (throw_illegal_thread_state) { 2688 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2689 } 2690 2691 assert(native_thread != NULL, "Starting null thread?"); 2692 2693 if (native_thread->osthread() == NULL) { 2694 // No one should hold a reference to the 'native_thread'. 2695 delete native_thread; 2696 if (JvmtiExport::should_post_resource_exhausted()) { 2697 JvmtiExport::post_resource_exhausted( 2698 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2699 "unable to create new native thread"); 2700 } 2701 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2702 "unable to create new native thread"); 2703 } 2704 2705 Thread::start(native_thread); 2706 2707 JVM_END 2708 2709 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2710 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2711 // but is thought to be reliable and simple. In the case, where the receiver is the 2712 // same thread as the sender, no safepoint is needed. 2713 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2714 JVMWrapper("JVM_StopThread"); 2715 2716 oop java_throwable = JNIHandles::resolve(throwable); 2717 if (java_throwable == NULL) { 2718 THROW(vmSymbols::java_lang_NullPointerException()); 2719 } 2720 oop java_thread = JNIHandles::resolve_non_null(jthread); 2721 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2722 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); 2723 // First check if thread is alive 2724 if (receiver != NULL) { 2725 // Check if exception is getting thrown at self (use oop equality, since the 2726 // target object might exit) 2727 if (java_thread == thread->threadObj()) { 2728 THROW_OOP(java_throwable); 2729 } else { 2730 // Enques a VM_Operation to stop all threads and then deliver the exception... 2731 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2732 } 2733 } 2734 else { 2735 // Either: 2736 // - target thread has not been started before being stopped, or 2737 // - target thread already terminated 2738 // We could read the threadStatus to determine which case it is 2739 // but that is overkill as it doesn't matter. We must set the 2740 // stillborn flag for the first case, and if the thread has already 2741 // exited setting this flag has no affect 2742 java_lang_Thread::set_stillborn(java_thread); 2743 } 2744 JVM_END 2745 2746 2747 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2748 JVMWrapper("JVM_IsThreadAlive"); 2749 2750 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2751 return java_lang_Thread::is_alive(thread_oop); 2752 JVM_END 2753 2754 2755 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2756 JVMWrapper("JVM_SuspendThread"); 2757 oop java_thread = JNIHandles::resolve_non_null(jthread); 2758 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2759 2760 if (receiver != NULL) { 2761 // thread has run and has not exited (still on threads list) 2762 2763 { 2764 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2765 if (receiver->is_external_suspend()) { 2766 // Don't allow nested external suspend requests. We can't return 2767 // an error from this interface so just ignore the problem. 2768 return; 2769 } 2770 if (receiver->is_exiting()) { // thread is in the process of exiting 2771 return; 2772 } 2773 receiver->set_external_suspend(); 2774 } 2775 2776 // java_suspend() will catch threads in the process of exiting 2777 // and will ignore them. 2778 receiver->java_suspend(); 2779 2780 // It would be nice to have the following assertion in all the 2781 // time, but it is possible for a racing resume request to have 2782 // resumed this thread right after we suspended it. Temporarily 2783 // enable this assertion if you are chasing a different kind of 2784 // bug. 2785 // 2786 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2787 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2788 } 2789 JVM_END 2790 2791 2792 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2793 JVMWrapper("JVM_ResumeThread"); 2794 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2795 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2796 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2797 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2798 // looks at it. 2799 MutexLocker ml(Threads_lock); 2800 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2801 if (thr != NULL) { 2802 // the thread has run and is not in the process of exiting 2803 thr->java_resume(); 2804 } 2805 JVM_END 2806 2807 2808 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2809 JVMWrapper("JVM_SetThreadPriority"); 2810 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2811 MutexLocker ml(Threads_lock); 2812 oop java_thread = JNIHandles::resolve_non_null(jthread); 2813 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2814 JavaThread* thr = java_lang_Thread::thread(java_thread); 2815 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2816 Thread::set_priority(thr, (ThreadPriority)prio); 2817 } 2818 JVM_END 2819 2820 2821 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2822 JVMWrapper("JVM_Yield"); 2823 if (os::dont_yield()) return; 2824 HS_DTRACE_PROBE0(hotspot, thread__yield); 2825 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2826 // Critical for similar threading behaviour 2827 if (ConvertYieldToSleep) { 2828 os::sleep(thread, MinSleepInterval, false); 2829 } else { 2830 os::yield(); 2831 } 2832 JVM_END 2833 2834 2835 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2836 JVMWrapper("JVM_Sleep"); 2837 2838 if (millis < 0) { 2839 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2840 } 2841 2842 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2843 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2844 } 2845 2846 // Save current thread state and restore it at the end of this block. 2847 // And set new thread state to SLEEPING. 2848 JavaThreadSleepState jtss(thread); 2849 2850 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 2851 2852 if (millis == 0) { 2853 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2854 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2855 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2856 // for SOLARIS 2857 if (ConvertSleepToYield) { 2858 os::yield(); 2859 } else { 2860 ThreadState old_state = thread->osthread()->get_state(); 2861 thread->osthread()->set_state(SLEEPING); 2862 os::sleep(thread, MinSleepInterval, false); 2863 thread->osthread()->set_state(old_state); 2864 } 2865 } else { 2866 ThreadState old_state = thread->osthread()->get_state(); 2867 thread->osthread()->set_state(SLEEPING); 2868 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2869 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2870 // us while we were sleeping. We do not overwrite those. 2871 if (!HAS_PENDING_EXCEPTION) { 2872 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 2873 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2874 // to properly restore the thread state. That's likely wrong. 2875 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2876 } 2877 } 2878 thread->osthread()->set_state(old_state); 2879 } 2880 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 2881 JVM_END 2882 2883 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2884 JVMWrapper("JVM_CurrentThread"); 2885 oop jthread = thread->threadObj(); 2886 assert (thread != NULL, "no current thread!"); 2887 return JNIHandles::make_local(env, jthread); 2888 JVM_END 2889 2890 2891 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2892 JVMWrapper("JVM_CountStackFrames"); 2893 2894 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2895 oop java_thread = JNIHandles::resolve_non_null(jthread); 2896 bool throw_illegal_thread_state = false; 2897 int count = 0; 2898 2899 { 2900 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2901 // We need to re-resolve the java_thread, since a GC might have happened during the 2902 // acquire of the lock 2903 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2904 2905 if (thr == NULL) { 2906 // do nothing 2907 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2908 // Check whether this java thread has been suspended already. If not, throws 2909 // IllegalThreadStateException. We defer to throw that exception until 2910 // Threads_lock is released since loading exception class has to leave VM. 2911 // The correct way to test a thread is actually suspended is 2912 // wait_for_ext_suspend_completion(), but we can't call that while holding 2913 // the Threads_lock. The above tests are sufficient for our purposes 2914 // provided the walkability of the stack is stable - which it isn't 2915 // 100% but close enough for most practical purposes. 2916 throw_illegal_thread_state = true; 2917 } else { 2918 // Count all java activation, i.e., number of vframes 2919 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2920 // Native frames are not counted 2921 if (!vfst.method()->is_native()) count++; 2922 } 2923 } 2924 } 2925 2926 if (throw_illegal_thread_state) { 2927 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2928 "this thread is not suspended"); 2929 } 2930 return count; 2931 JVM_END 2932 2933 // Consider: A better way to implement JVM_Interrupt() is to acquire 2934 // Threads_lock to resolve the jthread into a Thread pointer, fetch 2935 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2936 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 2937 // outside the critical section. Threads_lock is hot so we want to minimize 2938 // the hold-time. A cleaner interface would be to decompose interrupt into 2939 // two steps. The 1st phase, performed under Threads_lock, would return 2940 // a closure that'd be invoked after Threads_lock was dropped. 2941 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2942 // admit spurious wakeups. 2943 2944 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2945 JVMWrapper("JVM_Interrupt"); 2946 2947 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2948 oop java_thread = JNIHandles::resolve_non_null(jthread); 2949 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2950 // We need to re-resolve the java_thread, since a GC might have happened during the 2951 // acquire of the lock 2952 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2953 if (thr != NULL) { 2954 Thread::interrupt(thr); 2955 } 2956 JVM_END 2957 2958 2959 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2960 JVMWrapper("JVM_IsInterrupted"); 2961 2962 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2963 oop java_thread = JNIHandles::resolve_non_null(jthread); 2964 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2965 // We need to re-resolve the java_thread, since a GC might have happened during the 2966 // acquire of the lock 2967 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2968 if (thr == NULL) { 2969 return JNI_FALSE; 2970 } else { 2971 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2972 } 2973 JVM_END 2974 2975 2976 // Return true iff the current thread has locked the object passed in 2977 2978 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 2979 JVMWrapper("JVM_HoldsLock"); 2980 assert(THREAD->is_Java_thread(), "sanity check"); 2981 if (obj == NULL) { 2982 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 2983 } 2984 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 2985 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 2986 JVM_END 2987 2988 2989 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 2990 JVMWrapper("JVM_DumpAllStacks"); 2991 VM_PrintThreads op; 2992 VMThread::execute(&op); 2993 if (JvmtiExport::should_post_data_dump()) { 2994 JvmtiExport::post_data_dump(); 2995 } 2996 JVM_END 2997 2998 2999 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3000 3001 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3002 assert(jthread->is_Java_thread(), "must be a Java thread"); 3003 if (jthread->privileged_stack_top() == NULL) return false; 3004 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3005 oop loader = jthread->privileged_stack_top()->class_loader(); 3006 if (loader == NULL) return true; 3007 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3008 if (trusted) return true; 3009 } 3010 return false; 3011 } 3012 3013 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3014 JVMWrapper("JVM_CurrentLoadedClass"); 3015 ResourceMark rm(THREAD); 3016 3017 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3018 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3019 bool trusted = is_trusted_frame(thread, &vfst); 3020 if (trusted) return NULL; 3021 3022 methodOop m = vfst.method(); 3023 if (!m->is_native()) { 3024 klassOop holder = m->method_holder(); 3025 oop loader = instanceKlass::cast(holder)->class_loader(); 3026 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3027 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 3028 } 3029 } 3030 } 3031 return NULL; 3032 JVM_END 3033 3034 3035 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3036 JVMWrapper("JVM_CurrentClassLoader"); 3037 ResourceMark rm(THREAD); 3038 3039 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3040 3041 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3042 bool trusted = is_trusted_frame(thread, &vfst); 3043 if (trusted) return NULL; 3044 3045 methodOop m = vfst.method(); 3046 if (!m->is_native()) { 3047 klassOop holder = m->method_holder(); 3048 assert(holder->is_klass(), "just checking"); 3049 oop loader = instanceKlass::cast(holder)->class_loader(); 3050 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3051 return JNIHandles::make_local(env, loader); 3052 } 3053 } 3054 } 3055 return NULL; 3056 JVM_END 3057 3058 3059 // Utility object for collecting method holders walking down the stack 3060 class KlassLink: public ResourceObj { 3061 public: 3062 KlassHandle klass; 3063 KlassLink* next; 3064 3065 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3066 }; 3067 3068 3069 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3070 JVMWrapper("JVM_GetClassContext"); 3071 ResourceMark rm(THREAD); 3072 JvmtiVMObjectAllocEventCollector oam; 3073 // Collect linked list of (handles to) method holders 3074 KlassLink* first = NULL; 3075 KlassLink* last = NULL; 3076 int depth = 0; 3077 3078 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 3079 // Native frames are not returned 3080 if (!vfst.method()->is_native()) { 3081 klassOop holder = vfst.method()->method_holder(); 3082 assert(holder->is_klass(), "just checking"); 3083 depth++; 3084 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3085 if (first == NULL) { 3086 first = last = l; 3087 } else { 3088 last->next = l; 3089 last = l; 3090 } 3091 } 3092 } 3093 3094 // Create result array of type [Ljava/lang/Class; 3095 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3096 // Fill in mirrors corresponding to method holders 3097 int index = 0; 3098 while (first != NULL) { 3099 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 3100 first = first->next; 3101 } 3102 assert(index == depth, "just checking"); 3103 3104 return (jobjectArray) JNIHandles::make_local(env, result); 3105 JVM_END 3106 3107 3108 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3109 JVMWrapper("JVM_ClassDepth"); 3110 ResourceMark rm(THREAD); 3111 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3112 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3113 3114 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3115 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3116 if (class_name_sym == NULL) { 3117 return -1; 3118 } 3119 3120 int depth = 0; 3121 3122 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3123 if (!vfst.method()->is_native()) { 3124 klassOop holder = vfst.method()->method_holder(); 3125 assert(holder->is_klass(), "just checking"); 3126 if (instanceKlass::cast(holder)->name() == class_name_sym) { 3127 return depth; 3128 } 3129 depth++; 3130 } 3131 } 3132 return -1; 3133 JVM_END 3134 3135 3136 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3137 JVMWrapper("JVM_ClassLoaderDepth"); 3138 ResourceMark rm(THREAD); 3139 int depth = 0; 3140 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3141 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3142 bool trusted = is_trusted_frame(thread, &vfst); 3143 if (trusted) return -1; 3144 3145 methodOop m = vfst.method(); 3146 if (!m->is_native()) { 3147 klassOop holder = m->method_holder(); 3148 assert(holder->is_klass(), "just checking"); 3149 oop loader = instanceKlass::cast(holder)->class_loader(); 3150 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3151 return depth; 3152 } 3153 depth++; 3154 } 3155 } 3156 return -1; 3157 JVM_END 3158 3159 3160 // java.lang.Package //////////////////////////////////////////////////////////////// 3161 3162 3163 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3164 JVMWrapper("JVM_GetSystemPackage"); 3165 ResourceMark rm(THREAD); 3166 JvmtiVMObjectAllocEventCollector oam; 3167 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3168 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3169 return (jstring) JNIHandles::make_local(result); 3170 JVM_END 3171 3172 3173 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3174 JVMWrapper("JVM_GetSystemPackages"); 3175 JvmtiVMObjectAllocEventCollector oam; 3176 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3177 return (jobjectArray) JNIHandles::make_local(result); 3178 JVM_END 3179 3180 3181 // ObjectInputStream /////////////////////////////////////////////////////////////// 3182 3183 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { 3184 if (current_class == NULL) { 3185 return true; 3186 } 3187 if ((current_class == field_class) || access.is_public()) { 3188 return true; 3189 } 3190 3191 if (access.is_protected()) { 3192 // See if current_class is a subclass of field_class 3193 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3194 return true; 3195 } 3196 } 3197 3198 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); 3199 } 3200 3201 3202 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3203 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3204 JVMWrapper("JVM_AllocateNewObject"); 3205 JvmtiVMObjectAllocEventCollector oam; 3206 // Receiver is not used 3207 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3208 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3209 3210 // Cannot instantiate primitive types 3211 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3212 ResourceMark rm(THREAD); 3213 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3214 } 3215 3216 // Arrays not allowed here, must use JVM_AllocateNewArray 3217 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || 3218 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { 3219 ResourceMark rm(THREAD); 3220 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3221 } 3222 3223 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); 3224 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); 3225 3226 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3227 3228 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3229 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3230 3231 // Make sure klass is initialized, since we are about to instantiate one of them. 3232 curr_klass->initialize(CHECK_NULL); 3233 3234 methodHandle m (THREAD, 3235 init_klass->find_method(vmSymbols::object_initializer_name(), 3236 vmSymbols::void_method_signature())); 3237 if (m.is_null()) { 3238 ResourceMark rm(THREAD); 3239 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3240 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), 3241 vmSymbols::object_initializer_name(), 3242 vmSymbols::void_method_signature())); 3243 } 3244 3245 if (curr_klass == init_klass && !m->is_public()) { 3246 // Calling the constructor for class 'curr_klass'. 3247 // Only allow calls to a public no-arg constructor. 3248 // This path corresponds to creating an Externalizable object. 3249 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3250 } 3251 3252 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3253 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3254 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3255 } 3256 3257 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3258 // Call constructor m. This might call a constructor higher up in the hierachy 3259 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3260 3261 return JNIHandles::make_local(obj()); 3262 JVM_END 3263 3264 3265 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3266 JVMWrapper("JVM_AllocateNewArray"); 3267 JvmtiVMObjectAllocEventCollector oam; 3268 oop mirror = JNIHandles::resolve_non_null(currClass); 3269 3270 if (java_lang_Class::is_primitive(mirror)) { 3271 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3272 } 3273 klassOop k = java_lang_Class::as_klassOop(mirror); 3274 oop result; 3275 3276 if (k->klass_part()->oop_is_typeArray()) { 3277 // typeArray 3278 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3279 } else if (k->klass_part()->oop_is_objArray()) { 3280 // objArray 3281 objArrayKlassHandle oak(THREAD, k); 3282 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3283 result = oak->allocate(length, CHECK_NULL); 3284 } else { 3285 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3286 } 3287 return JNIHandles::make_local(env, result); 3288 JVM_END 3289 3290 3291 // Return the first non-null class loader up the execution stack, or null 3292 // if only code from the null class loader is on the stack. 3293 3294 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3295 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3296 // UseNewReflection 3297 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3298 klassOop holder = vfst.method()->method_holder(); 3299 oop loader = instanceKlass::cast(holder)->class_loader(); 3300 if (loader != NULL) { 3301 return JNIHandles::make_local(env, loader); 3302 } 3303 } 3304 return NULL; 3305 JVM_END 3306 3307 3308 // Load a class relative to the most recent class on the stack with a non-null 3309 // classloader. 3310 // This function has been deprecated and should not be considered part of the 3311 // specified JVM interface. 3312 3313 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3314 jclass currClass, jstring currClassName)) 3315 JVMWrapper("JVM_LoadClass0"); 3316 // Receiver is not used 3317 ResourceMark rm(THREAD); 3318 3319 // Class name argument is not guaranteed to be in internal format 3320 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3321 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3322 3323 const char* str = java_lang_String::as_utf8_string(string()); 3324 3325 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3326 // It's impossible to create this class; the name cannot fit 3327 // into the constant pool. 3328 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3329 } 3330 3331 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3332 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3333 // Find the most recent class on the stack with a non-null classloader 3334 oop loader = NULL; 3335 oop protection_domain = NULL; 3336 if (curr_klass.is_null()) { 3337 for (vframeStream vfst(thread); 3338 !vfst.at_end() && loader == NULL; 3339 vfst.next()) { 3340 if (!vfst.method()->is_native()) { 3341 klassOop holder = vfst.method()->method_holder(); 3342 loader = instanceKlass::cast(holder)->class_loader(); 3343 protection_domain = instanceKlass::cast(holder)->protection_domain(); 3344 } 3345 } 3346 } else { 3347 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); 3348 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); 3349 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); 3350 } 3351 Handle h_loader(THREAD, loader); 3352 Handle h_prot (THREAD, protection_domain); 3353 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3354 false, thread); 3355 if (TraceClassResolution && result != NULL) { 3356 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 3357 } 3358 return result; 3359 JVM_END 3360 3361 3362 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3363 3364 3365 // resolve array handle and check arguments 3366 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3367 if (arr == NULL) { 3368 THROW_0(vmSymbols::java_lang_NullPointerException()); 3369 } 3370 oop a = JNIHandles::resolve_non_null(arr); 3371 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { 3372 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3373 } 3374 return arrayOop(a); 3375 } 3376 3377 3378 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3379 JVMWrapper("JVM_GetArrayLength"); 3380 arrayOop a = check_array(env, arr, false, CHECK_0); 3381 return a->length(); 3382 JVM_END 3383 3384 3385 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3386 JVMWrapper("JVM_Array_Get"); 3387 JvmtiVMObjectAllocEventCollector oam; 3388 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3389 jvalue value; 3390 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3391 oop box = Reflection::box(&value, type, CHECK_NULL); 3392 return JNIHandles::make_local(env, box); 3393 JVM_END 3394 3395 3396 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3397 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3398 jvalue value; 3399 value.i = 0; // to initialize value before getting used in CHECK 3400 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3401 assert(a->is_typeArray(), "just checking"); 3402 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3403 BasicType wide_type = (BasicType) wCode; 3404 if (type != wide_type) { 3405 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3406 } 3407 return value; 3408 JVM_END 3409 3410 3411 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3412 JVMWrapper("JVM_SetArrayElement"); 3413 arrayOop a = check_array(env, arr, false, CHECK); 3414 oop box = JNIHandles::resolve(val); 3415 jvalue value; 3416 value.i = 0; // to initialize value before getting used in CHECK 3417 BasicType value_type; 3418 if (a->is_objArray()) { 3419 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3420 value_type = Reflection::unbox_for_regular_object(box, &value); 3421 } else { 3422 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3423 } 3424 Reflection::array_set(&value, a, index, value_type, CHECK); 3425 JVM_END 3426 3427 3428 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3429 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3430 arrayOop a = check_array(env, arr, true, CHECK); 3431 assert(a->is_typeArray(), "just checking"); 3432 BasicType value_type = (BasicType) vCode; 3433 Reflection::array_set(&v, a, index, value_type, CHECK); 3434 JVM_END 3435 3436 3437 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3438 JVMWrapper("JVM_NewArray"); 3439 JvmtiVMObjectAllocEventCollector oam; 3440 oop element_mirror = JNIHandles::resolve(eltClass); 3441 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3442 return JNIHandles::make_local(env, result); 3443 JVM_END 3444 3445 3446 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3447 JVMWrapper("JVM_NewMultiArray"); 3448 JvmtiVMObjectAllocEventCollector oam; 3449 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3450 oop element_mirror = JNIHandles::resolve(eltClass); 3451 assert(dim_array->is_typeArray(), "just checking"); 3452 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3453 return JNIHandles::make_local(env, result); 3454 JVM_END 3455 3456 3457 // Networking library support //////////////////////////////////////////////////////////////////// 3458 3459 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3460 JVMWrapper("JVM_InitializeSocketLibrary"); 3461 return 0; 3462 JVM_END 3463 3464 3465 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3466 JVMWrapper("JVM_Socket"); 3467 return os::socket(domain, type, protocol); 3468 JVM_END 3469 3470 3471 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3472 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3473 //%note jvm_r6 3474 return os::socket_close(fd); 3475 JVM_END 3476 3477 3478 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3479 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3480 //%note jvm_r6 3481 return os::socket_shutdown(fd, howto); 3482 JVM_END 3483 3484 3485 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3486 JVMWrapper2("JVM_Recv (0x%x)", fd); 3487 //%note jvm_r6 3488 return os::recv(fd, buf, nBytes, flags); 3489 JVM_END 3490 3491 3492 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3493 JVMWrapper2("JVM_Send (0x%x)", fd); 3494 //%note jvm_r6 3495 return os::send(fd, buf, nBytes, flags); 3496 JVM_END 3497 3498 3499 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3500 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3501 //%note jvm_r6 3502 return os::timeout(fd, timeout); 3503 JVM_END 3504 3505 3506 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3507 JVMWrapper2("JVM_Listen (0x%x)", fd); 3508 //%note jvm_r6 3509 return os::listen(fd, count); 3510 JVM_END 3511 3512 3513 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3514 JVMWrapper2("JVM_Connect (0x%x)", fd); 3515 //%note jvm_r6 3516 return os::connect(fd, him, len); 3517 JVM_END 3518 3519 3520 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3521 JVMWrapper2("JVM_Bind (0x%x)", fd); 3522 //%note jvm_r6 3523 return os::bind(fd, him, len); 3524 JVM_END 3525 3526 3527 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3528 JVMWrapper2("JVM_Accept (0x%x)", fd); 3529 //%note jvm_r6 3530 return os::accept(fd, him, (int *)len); 3531 JVM_END 3532 3533 3534 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3535 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3536 //%note jvm_r6 3537 return os::recvfrom(fd, buf, nBytes, flags, from, fromlen); 3538 JVM_END 3539 3540 3541 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3542 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3543 //%note jvm_r6 3544 return os::get_sock_name(fd, him, len); 3545 JVM_END 3546 3547 3548 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3549 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3550 //%note jvm_r6 3551 return os::sendto(fd, buf, len, flags, to, tolen); 3552 JVM_END 3553 3554 3555 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3556 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3557 //%note jvm_r6 3558 return os::socket_available(fd, pbytes); 3559 JVM_END 3560 3561 3562 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3563 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3564 //%note jvm_r6 3565 return os::get_sock_opt(fd, level, optname, optval, optlen); 3566 JVM_END 3567 3568 3569 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3570 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3571 //%note jvm_r6 3572 return os::set_sock_opt(fd, level, optname, optval, optlen); 3573 JVM_END 3574 3575 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3576 JVMWrapper("JVM_GetHostName"); 3577 return os::get_host_name(name, namelen); 3578 JVM_END 3579 3580 // Library support /////////////////////////////////////////////////////////////////////////// 3581 3582 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3583 //%note jvm_ct 3584 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3585 char ebuf[1024]; 3586 void *load_result; 3587 { 3588 ThreadToNativeFromVM ttnfvm(thread); 3589 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3590 } 3591 if (load_result == NULL) { 3592 char msg[1024]; 3593 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3594 // Since 'ebuf' may contain a string encoded using 3595 // platform encoding scheme, we need to pass 3596 // Exceptions::unsafe_to_utf8 to the new_exception method 3597 // as the last argument. See bug 6367357. 3598 Handle h_exception = 3599 Exceptions::new_exception(thread, 3600 vmSymbols::java_lang_UnsatisfiedLinkError(), 3601 msg, Exceptions::unsafe_to_utf8); 3602 3603 THROW_HANDLE_0(h_exception); 3604 } 3605 return load_result; 3606 JVM_END 3607 3608 3609 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3610 JVMWrapper("JVM_UnloadLibrary"); 3611 os::dll_unload(handle); 3612 JVM_END 3613 3614 3615 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3616 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3617 return os::dll_lookup(handle, name); 3618 JVM_END 3619 3620 // Floating point support //////////////////////////////////////////////////////////////////// 3621 3622 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3623 JVMWrapper("JVM_IsNaN"); 3624 return g_isnan(a); 3625 JVM_END 3626 3627 3628 3629 // JNI version /////////////////////////////////////////////////////////////////////////////// 3630 3631 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3632 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3633 return Threads::is_supported_jni_version_including_1_1(version); 3634 JVM_END 3635 3636 3637 // String support /////////////////////////////////////////////////////////////////////////// 3638 3639 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3640 JVMWrapper("JVM_InternString"); 3641 JvmtiVMObjectAllocEventCollector oam; 3642 if (str == NULL) return NULL; 3643 oop string = JNIHandles::resolve_non_null(str); 3644 oop result = StringTable::intern(string, CHECK_NULL); 3645 return (jstring) JNIHandles::make_local(env, result); 3646 JVM_END 3647 3648 3649 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3650 3651 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3652 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3653 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3654 // that only works with java threads. 3655 3656 3657 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3658 VM_Exit::block_if_vm_exited(); 3659 JVMWrapper("JVM_RawMonitorCreate"); 3660 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3661 } 3662 3663 3664 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3665 VM_Exit::block_if_vm_exited(); 3666 JVMWrapper("JVM_RawMonitorDestroy"); 3667 delete ((Mutex*) mon); 3668 } 3669 3670 3671 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3672 VM_Exit::block_if_vm_exited(); 3673 JVMWrapper("JVM_RawMonitorEnter"); 3674 ((Mutex*) mon)->jvm_raw_lock(); 3675 return 0; 3676 } 3677 3678 3679 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3680 VM_Exit::block_if_vm_exited(); 3681 JVMWrapper("JVM_RawMonitorExit"); 3682 ((Mutex*) mon)->jvm_raw_unlock(); 3683 } 3684 3685 3686 // Support for Serialization 3687 3688 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3689 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3690 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3691 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3692 3693 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3694 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3695 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3696 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3697 3698 3699 void initialize_converter_functions() { 3700 if (JDK_Version::is_gte_jdk14x_version()) { 3701 // These functions only exist for compatibility with 1.3.1 and earlier 3702 return; 3703 } 3704 3705 // called from universe_post_init() 3706 assert( 3707 int_bits_to_float_fn == NULL && 3708 long_bits_to_double_fn == NULL && 3709 float_to_int_bits_fn == NULL && 3710 double_to_long_bits_fn == NULL , 3711 "initialization done twice" 3712 ); 3713 // initialize 3714 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3715 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3716 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3717 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3718 // verify 3719 assert( 3720 int_bits_to_float_fn != NULL && 3721 long_bits_to_double_fn != NULL && 3722 float_to_int_bits_fn != NULL && 3723 double_to_long_bits_fn != NULL , 3724 "initialization failed" 3725 ); 3726 } 3727 3728 3729 // Serialization 3730 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3731 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3732 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3733 3734 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3735 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3736 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3737 oop o = JNIHandles::resolve(obj); 3738 3739 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3740 THROW(vmSymbols::java_lang_NullPointerException()); 3741 } 3742 3743 jsize nfids = fids->length(); 3744 if (nfids == 0) return; 3745 3746 if (tcodes->length() < nfids) { 3747 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3748 } 3749 3750 jsize off = 0; 3751 /* loop through fields, setting values */ 3752 for (jsize i = 0; i < nfids; i++) { 3753 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3754 int field_offset; 3755 if (fid != NULL) { 3756 // NULL is a legal value for fid, but retrieving the field offset 3757 // trigger assertion in that case 3758 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3759 } 3760 3761 switch (tcodes->char_at(i)) { 3762 case 'Z': 3763 if (fid != NULL) { 3764 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3765 o->bool_field_put(field_offset, val); 3766 } 3767 off++; 3768 break; 3769 3770 case 'B': 3771 if (fid != NULL) { 3772 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3773 } 3774 off++; 3775 break; 3776 3777 case 'C': 3778 if (fid != NULL) { 3779 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3780 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3781 o->char_field_put(field_offset, val); 3782 } 3783 off += 2; 3784 break; 3785 3786 case 'S': 3787 if (fid != NULL) { 3788 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3789 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3790 o->short_field_put(field_offset, val); 3791 } 3792 off += 2; 3793 break; 3794 3795 case 'I': 3796 if (fid != NULL) { 3797 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3798 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3799 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3800 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3801 o->int_field_put(field_offset, ival); 3802 } 3803 off += 4; 3804 break; 3805 3806 case 'F': 3807 if (fid != NULL) { 3808 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3809 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3810 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3811 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3812 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3813 o->float_field_put(field_offset, fval); 3814 } 3815 off += 4; 3816 break; 3817 3818 case 'J': 3819 if (fid != NULL) { 3820 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3821 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3822 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3823 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3824 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3825 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3826 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3827 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3828 o->long_field_put(field_offset, lval); 3829 } 3830 off += 8; 3831 break; 3832 3833 case 'D': 3834 if (fid != NULL) { 3835 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3836 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3837 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3838 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3839 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3840 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3841 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3842 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3843 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3844 o->double_field_put(field_offset, dval); 3845 } 3846 off += 8; 3847 break; 3848 3849 default: 3850 // Illegal typecode 3851 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3852 } 3853 } 3854 JVM_END 3855 3856 3857 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3858 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3859 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3860 3861 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3862 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3863 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3864 oop o = JNIHandles::resolve(obj); 3865 3866 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3867 THROW(vmSymbols::java_lang_NullPointerException()); 3868 } 3869 3870 jsize nfids = fids->length(); 3871 if (nfids == 0) return; 3872 3873 if (tcodes->length() < nfids) { 3874 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3875 } 3876 3877 /* loop through fields, fetching values */ 3878 jsize off = 0; 3879 for (jsize i = 0; i < nfids; i++) { 3880 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3881 if (fid == NULL) { 3882 THROW(vmSymbols::java_lang_NullPointerException()); 3883 } 3884 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3885 3886 switch (tcodes->char_at(i)) { 3887 case 'Z': 3888 { 3889 jboolean val = o->bool_field(field_offset); 3890 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3891 } 3892 break; 3893 3894 case 'B': 3895 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3896 break; 3897 3898 case 'C': 3899 { 3900 jchar val = o->char_field(field_offset); 3901 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3902 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3903 } 3904 break; 3905 3906 case 'S': 3907 { 3908 jshort val = o->short_field(field_offset); 3909 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3910 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3911 } 3912 break; 3913 3914 case 'I': 3915 { 3916 jint val = o->int_field(field_offset); 3917 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3918 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3919 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3920 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3921 } 3922 break; 3923 3924 case 'F': 3925 { 3926 jfloat fval = o->float_field(field_offset); 3927 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3928 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3929 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3930 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3931 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3932 } 3933 break; 3934 3935 case 'J': 3936 { 3937 jlong val = o->long_field(field_offset); 3938 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 3939 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 3940 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 3941 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 3942 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3943 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3944 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3945 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3946 } 3947 break; 3948 3949 case 'D': 3950 { 3951 jdouble dval = o->double_field(field_offset); 3952 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 3953 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 3954 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 3955 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 3956 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 3957 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 3958 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 3959 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 3960 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 3961 } 3962 break; 3963 3964 default: 3965 // Illegal typecode 3966 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3967 } 3968 } 3969 JVM_END 3970 3971 3972 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3973 3974 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3975 // Security Note: 3976 // The Java level wrapper will perform the necessary security check allowing 3977 // us to pass the NULL as the initiating class loader. 3978 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3979 3980 KlassHandle klass_handle(THREAD, klass); 3981 // Check if we should initialize the class 3982 if (init && klass_handle->oop_is_instance()) { 3983 klass_handle->initialize(CHECK_NULL); 3984 } 3985 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3986 } 3987 3988 3989 // Internal SQE debugging support /////////////////////////////////////////////////////////// 3990 3991 #ifndef PRODUCT 3992 3993 extern "C" { 3994 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 3995 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 3996 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 3997 } 3998 3999 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4000 JVMWrapper("JVM_AccessBoolVMFlag"); 4001 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4002 JVM_END 4003 4004 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4005 JVMWrapper("JVM_AccessVMIntFlag"); 4006 intx v; 4007 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4008 *value = (jint)v; 4009 return result; 4010 JVM_END 4011 4012 4013 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4014 JVMWrapper("JVM_VMBreakPoint"); 4015 oop the_obj = JNIHandles::resolve(obj); 4016 BREAKPOINT; 4017 JVM_END 4018 4019 4020 #endif 4021 4022 4023 //--------------------------------------------------------------------------- 4024 // 4025 // Support for old native code-based reflection (pre-JDK 1.4) 4026 // Disabled by default in the product build. 4027 // 4028 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION 4029 // 4030 //--------------------------------------------------------------------------- 4031 4032 #ifdef SUPPORT_OLD_REFLECTION 4033 4034 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) 4035 JVMWrapper("JVM_GetClassFields"); 4036 JvmtiVMObjectAllocEventCollector oam; 4037 oop mirror = JNIHandles::resolve_non_null(cls); 4038 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); 4039 return (jobjectArray) JNIHandles::make_local(env, result); 4040 JVM_END 4041 4042 4043 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) 4044 JVMWrapper("JVM_GetClassMethods"); 4045 JvmtiVMObjectAllocEventCollector oam; 4046 oop mirror = JNIHandles::resolve_non_null(cls); 4047 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); 4048 //%note jvm_r4 4049 return (jobjectArray) JNIHandles::make_local(env, result); 4050 JVM_END 4051 4052 4053 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) 4054 JVMWrapper("JVM_GetClassConstructors"); 4055 JvmtiVMObjectAllocEventCollector oam; 4056 oop mirror = JNIHandles::resolve_non_null(cls); 4057 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); 4058 //%note jvm_r4 4059 return (jobjectArray) JNIHandles::make_local(env, result); 4060 JVM_END 4061 4062 4063 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) 4064 JVMWrapper("JVM_GetClassField"); 4065 JvmtiVMObjectAllocEventCollector oam; 4066 if (name == NULL) return NULL; 4067 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 4068 4069 const char* cstr = java_lang_String::as_utf8_string(str()); 4070 TempNewSymbol field_name = SymbolTable::probe(cstr, (int)strlen(cstr)); 4071 if (field_name == NULL) { 4072 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 4073 } 4074 4075 oop mirror = JNIHandles::resolve_non_null(cls); 4076 oop result = Reflection::reflect_field(mirror, field_name, which, CHECK_NULL); 4077 if (result == NULL) { 4078 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 4079 } 4080 return JNIHandles::make_local(env, result); 4081 JVM_END 4082 4083 4084 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) 4085 JVMWrapper("JVM_GetClassMethod"); 4086 JvmtiVMObjectAllocEventCollector oam; 4087 if (name == NULL) { 4088 THROW_0(vmSymbols::java_lang_NullPointerException()); 4089 } 4090 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 4091 4092 const char* cstr = java_lang_String::as_utf8_string(str()); 4093 TempNewSymbol method_name = SymbolTable::probe(cstr, (int)strlen(cstr)); 4094 if (method_name == NULL) { 4095 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4096 } 4097 4098 oop mirror = JNIHandles::resolve_non_null(cls); 4099 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 4100 oop result = Reflection::reflect_method(mirror, method_name, tarray, 4101 which, CHECK_NULL); 4102 if (result == NULL) { 4103 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4104 } 4105 return JNIHandles::make_local(env, result); 4106 JVM_END 4107 4108 4109 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) 4110 JVMWrapper("JVM_GetClassConstructor"); 4111 JvmtiVMObjectAllocEventCollector oam; 4112 oop mirror = JNIHandles::resolve_non_null(cls); 4113 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 4114 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); 4115 if (result == NULL) { 4116 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4117 } 4118 return (jobject) JNIHandles::make_local(env, result); 4119 JVM_END 4120 4121 4122 // Instantiation /////////////////////////////////////////////////////////////////////////////// 4123 4124 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) 4125 JVMWrapper("JVM_NewInstance"); 4126 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); 4127 4128 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); 4129 if (resolved_constructor == NULL) { 4130 klassOop k = java_lang_Class::as_klassOop(mirror()); 4131 // The java.lang.Class object caches a resolved constructor if all the checks 4132 // below were done successfully and a constructor was found. 4133 4134 // Do class based checks 4135 if (java_lang_Class::is_primitive(mirror())) { 4136 const char* msg = ""; 4137 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; 4138 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; 4139 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; 4140 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; 4141 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; 4142 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; 4143 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; 4144 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; 4145 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); 4146 } 4147 4148 // Check whether we are allowed to instantiate this class 4149 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here 4150 instanceKlassHandle klass(THREAD, k); 4151 // Make sure class is initialized (also so all methods are rewritten) 4152 klass->initialize(CHECK_NULL); 4153 4154 // Lookup default constructor 4155 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); 4156 if (resolved_constructor == NULL) { 4157 ResourceMark rm(THREAD); 4158 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); 4159 } 4160 4161 // Cache result in java.lang.Class object. Does not have to be MT safe. 4162 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); 4163 } 4164 4165 assert(resolved_constructor != NULL, "sanity check"); 4166 methodHandle constructor = methodHandle(THREAD, resolved_constructor); 4167 4168 // We have an initialized instanceKlass with a default constructor 4169 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 4170 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); 4171 4172 // Do security check 4173 klassOop caller_klass = NULL; 4174 if (UsePrivilegedStack) { 4175 caller_klass = thread->security_get_caller_class(2); 4176 4177 if (!Reflection::verify_class_access(caller_klass, klass(), false) || 4178 !Reflection::verify_field_access(caller_klass, 4179 klass(), 4180 klass(), 4181 constructor->access_flags(), 4182 false, 4183 true)) { 4184 ResourceMark rm(THREAD); 4185 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); 4186 } 4187 } 4188 4189 // Allocate object and call constructor 4190 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 4191 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); 4192 4193 jobject res = JNIHandles::make_local(env, receiver()); 4194 if (JvmtiExport::should_post_vm_object_alloc()) { 4195 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); 4196 } 4197 return res; 4198 JVM_END 4199 4200 4201 // Field //////////////////////////////////////////////////////////////////////////////////////////// 4202 4203 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) 4204 JVMWrapper("JVM_GetField"); 4205 JvmtiVMObjectAllocEventCollector oam; 4206 Handle field_mirror(thread, JNIHandles::resolve(field)); 4207 Handle receiver (thread, JNIHandles::resolve(obj)); 4208 fieldDescriptor fd; 4209 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); 4210 jvalue value; 4211 BasicType type = Reflection::field_get(&value, &fd, receiver); 4212 oop box = Reflection::box(&value, type, CHECK_NULL); 4213 return JNIHandles::make_local(env, box); 4214 JVM_END 4215 4216 4217 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) 4218 JVMWrapper("JVM_GetPrimitiveField"); 4219 Handle field_mirror(thread, JNIHandles::resolve(field)); 4220 Handle receiver (thread, JNIHandles::resolve(obj)); 4221 fieldDescriptor fd; 4222 jvalue value; 4223 value.j = 0; 4224 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); 4225 BasicType type = Reflection::field_get(&value, &fd, receiver); 4226 BasicType wide_type = (BasicType) wCode; 4227 if (type != wide_type) { 4228 Reflection::widen(&value, type, wide_type, CHECK_(value)); 4229 } 4230 return value; 4231 JVM_END // should really be JVM_END, but that doesn't work for union types! 4232 4233 4234 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) 4235 JVMWrapper("JVM_SetField"); 4236 Handle field_mirror(thread, JNIHandles::resolve(field)); 4237 Handle receiver (thread, JNIHandles::resolve(obj)); 4238 oop box = JNIHandles::resolve(val); 4239 fieldDescriptor fd; 4240 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4241 BasicType field_type = fd.field_type(); 4242 jvalue value; 4243 BasicType value_type; 4244 if (field_type == T_OBJECT || field_type == T_ARRAY) { 4245 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 4246 value_type = Reflection::unbox_for_regular_object(box, &value); 4247 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); 4248 } else { 4249 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 4250 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); 4251 } 4252 JVM_END 4253 4254 4255 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) 4256 JVMWrapper("JVM_SetPrimitiveField"); 4257 Handle field_mirror(thread, JNIHandles::resolve(field)); 4258 Handle receiver (thread, JNIHandles::resolve(obj)); 4259 fieldDescriptor fd; 4260 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4261 BasicType value_type = (BasicType) vCode; 4262 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); 4263 JVM_END 4264 4265 4266 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4267 4268 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4269 JVMWrapper("JVM_InvokeMethod"); 4270 Handle method_handle; 4271 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4272 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4273 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4274 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4275 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4276 jobject res = JNIHandles::make_local(env, result); 4277 if (JvmtiExport::should_post_vm_object_alloc()) { 4278 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4279 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4280 if (java_lang_Class::is_primitive(ret_type)) { 4281 // Only for primitive type vm allocates memory for java object. 4282 // See box() method. 4283 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4284 } 4285 } 4286 return res; 4287 } else { 4288 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4289 } 4290 JVM_END 4291 4292 4293 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4294 JVMWrapper("JVM_NewInstanceFromConstructor"); 4295 oop constructor_mirror = JNIHandles::resolve(c); 4296 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4297 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4298 jobject res = JNIHandles::make_local(env, result); 4299 if (JvmtiExport::should_post_vm_object_alloc()) { 4300 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4301 } 4302 return res; 4303 JVM_END 4304 4305 #endif /* SUPPORT_OLD_REFLECTION */ 4306 4307 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4308 4309 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4310 JVMWrapper("JVM_SupportsCX8"); 4311 return VM_Version::supports_cx8(); 4312 JVM_END 4313 4314 4315 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4316 JVMWrapper("JVM_CX8Field"); 4317 jlong res; 4318 oop o = JNIHandles::resolve(obj); 4319 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4320 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4321 4322 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4323 res = Atomic::cmpxchg(newVal, addr, oldVal); 4324 4325 return res == oldVal; 4326 JVM_END 4327 4328 // DTrace /////////////////////////////////////////////////////////////////// 4329 4330 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4331 JVMWrapper("JVM_DTraceGetVersion"); 4332 return (jint)JVM_TRACING_DTRACE_VERSION; 4333 JVM_END 4334 4335 JVM_ENTRY(jlong,JVM_DTraceActivate( 4336 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4337 JVM_DTraceProvider* providers)) 4338 JVMWrapper("JVM_DTraceActivate"); 4339 return DTraceJSDT::activate( 4340 version, module_name, providers_count, providers, CHECK_0); 4341 JVM_END 4342 4343 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4344 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4345 return DTraceJSDT::is_probe_enabled(method); 4346 JVM_END 4347 4348 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4349 JVMWrapper("JVM_DTraceDispose"); 4350 DTraceJSDT::dispose(handle); 4351 JVM_END 4352 4353 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4354 JVMWrapper("JVM_DTraceIsSupported"); 4355 return DTraceJSDT::is_supported(); 4356 JVM_END 4357 4358 // Returns an array of all live Thread objects (VM internal JavaThreads, 4359 // jvmti agent threads, and JNI attaching threads are skipped) 4360 // See CR 6404306 regarding JNI attaching threads 4361 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4362 ResourceMark rm(THREAD); 4363 ThreadsListEnumerator tle(THREAD, false, false); 4364 JvmtiVMObjectAllocEventCollector oam; 4365 4366 int num_threads = tle.num_threads(); 4367 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4368 objArrayHandle threads_ah(THREAD, r); 4369 4370 for (int i = 0; i < num_threads; i++) { 4371 Handle h = tle.get_threadObj(i); 4372 threads_ah->obj_at_put(i, h()); 4373 } 4374 4375 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4376 JVM_END 4377 4378 4379 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4380 // Return StackTraceElement[][], each element is the stack trace of a thread in 4381 // the corresponding entry in the given threads array 4382 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4383 JVMWrapper("JVM_DumpThreads"); 4384 JvmtiVMObjectAllocEventCollector oam; 4385 4386 // Check if threads is null 4387 if (threads == NULL) { 4388 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4389 } 4390 4391 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4392 objArrayHandle ah(THREAD, a); 4393 int num_threads = ah->length(); 4394 // check if threads is non-empty array 4395 if (num_threads == 0) { 4396 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4397 } 4398 4399 // check if threads is not an array of objects of Thread class 4400 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); 4401 if (k != SystemDictionary::Thread_klass()) { 4402 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4403 } 4404 4405 ResourceMark rm(THREAD); 4406 4407 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4408 for (int i = 0; i < num_threads; i++) { 4409 oop thread_obj = ah->obj_at(i); 4410 instanceHandle h(THREAD, (instanceOop) thread_obj); 4411 thread_handle_array->append(h); 4412 } 4413 4414 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4415 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4416 4417 JVM_END 4418 4419 // JVM monitoring and management support 4420 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4421 return Management::get_jmm_interface(version); 4422 JVM_END 4423 4424 // com.sun.tools.attach.VirtualMachine agent properties support 4425 // 4426 // Initialize the agent properties with the properties maintained in the VM 4427 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4428 JVMWrapper("JVM_InitAgentProperties"); 4429 ResourceMark rm; 4430 4431 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4432 4433 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4434 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4435 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4436 return properties; 4437 JVM_END 4438 4439 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4440 { 4441 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4442 JvmtiVMObjectAllocEventCollector oam; 4443 4444 if (ofClass == NULL) { 4445 return NULL; 4446 } 4447 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4448 // Special handling for primitive objects 4449 if (java_lang_Class::is_primitive(mirror())) { 4450 return NULL; 4451 } 4452 klassOop k = java_lang_Class::as_klassOop(mirror()); 4453 if (!Klass::cast(k)->oop_is_instance()) { 4454 return NULL; 4455 } 4456 instanceKlassHandle ik_h(THREAD, k); 4457 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4458 if (encl_method_class_idx == 0) { 4459 return NULL; 4460 } 4461 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4462 objArrayHandle dest(THREAD, dest_o); 4463 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4464 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4465 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4466 if (encl_method_method_idx != 0) { 4467 Symbol* sym = ik_h->constants()->symbol_at( 4468 extract_low_short_from_int( 4469 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4470 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4471 dest->obj_at_put(1, str()); 4472 sym = ik_h->constants()->symbol_at( 4473 extract_high_short_from_int( 4474 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4475 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4476 dest->obj_at_put(2, str()); 4477 } 4478 return (jobjectArray) JNIHandles::make_local(dest()); 4479 } 4480 JVM_END 4481 4482 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4483 jint javaThreadState)) 4484 { 4485 // If new thread states are added in future JDK and VM versions, 4486 // this should check if the JDK version is compatible with thread 4487 // states supported by the VM. Return NULL if not compatible. 4488 // 4489 // This function must map the VM java_lang_Thread::ThreadStatus 4490 // to the Java thread state that the JDK supports. 4491 // 4492 4493 typeArrayHandle values_h; 4494 switch (javaThreadState) { 4495 case JAVA_THREAD_STATE_NEW : { 4496 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4497 values_h = typeArrayHandle(THREAD, r); 4498 values_h->int_at_put(0, java_lang_Thread::NEW); 4499 break; 4500 } 4501 case JAVA_THREAD_STATE_RUNNABLE : { 4502 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4503 values_h = typeArrayHandle(THREAD, r); 4504 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4505 break; 4506 } 4507 case JAVA_THREAD_STATE_BLOCKED : { 4508 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4509 values_h = typeArrayHandle(THREAD, r); 4510 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4511 break; 4512 } 4513 case JAVA_THREAD_STATE_WAITING : { 4514 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4515 values_h = typeArrayHandle(THREAD, r); 4516 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4517 values_h->int_at_put(1, java_lang_Thread::PARKED); 4518 break; 4519 } 4520 case JAVA_THREAD_STATE_TIMED_WAITING : { 4521 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4522 values_h = typeArrayHandle(THREAD, r); 4523 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4524 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4525 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4526 break; 4527 } 4528 case JAVA_THREAD_STATE_TERMINATED : { 4529 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4530 values_h = typeArrayHandle(THREAD, r); 4531 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4532 break; 4533 } 4534 default: 4535 // Unknown state - probably incompatible JDK version 4536 return NULL; 4537 } 4538 4539 return (jintArray) JNIHandles::make_local(env, values_h()); 4540 } 4541 JVM_END 4542 4543 4544 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4545 jint javaThreadState, 4546 jintArray values)) 4547 { 4548 // If new thread states are added in future JDK and VM versions, 4549 // this should check if the JDK version is compatible with thread 4550 // states supported by the VM. Return NULL if not compatible. 4551 // 4552 // This function must map the VM java_lang_Thread::ThreadStatus 4553 // to the Java thread state that the JDK supports. 4554 // 4555 4556 ResourceMark rm; 4557 4558 // Check if threads is null 4559 if (values == NULL) { 4560 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4561 } 4562 4563 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4564 typeArrayHandle values_h(THREAD, v); 4565 4566 objArrayHandle names_h; 4567 switch (javaThreadState) { 4568 case JAVA_THREAD_STATE_NEW : { 4569 assert(values_h->length() == 1 && 4570 values_h->int_at(0) == java_lang_Thread::NEW, 4571 "Invalid threadStatus value"); 4572 4573 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4574 1, /* only 1 substate */ 4575 CHECK_NULL); 4576 names_h = objArrayHandle(THREAD, r); 4577 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4578 names_h->obj_at_put(0, name()); 4579 break; 4580 } 4581 case JAVA_THREAD_STATE_RUNNABLE : { 4582 assert(values_h->length() == 1 && 4583 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4584 "Invalid threadStatus value"); 4585 4586 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4587 1, /* only 1 substate */ 4588 CHECK_NULL); 4589 names_h = objArrayHandle(THREAD, r); 4590 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4591 names_h->obj_at_put(0, name()); 4592 break; 4593 } 4594 case JAVA_THREAD_STATE_BLOCKED : { 4595 assert(values_h->length() == 1 && 4596 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4597 "Invalid threadStatus value"); 4598 4599 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4600 1, /* only 1 substate */ 4601 CHECK_NULL); 4602 names_h = objArrayHandle(THREAD, r); 4603 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4604 names_h->obj_at_put(0, name()); 4605 break; 4606 } 4607 case JAVA_THREAD_STATE_WAITING : { 4608 assert(values_h->length() == 2 && 4609 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4610 values_h->int_at(1) == java_lang_Thread::PARKED, 4611 "Invalid threadStatus value"); 4612 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4613 2, /* number of substates */ 4614 CHECK_NULL); 4615 names_h = objArrayHandle(THREAD, r); 4616 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4617 CHECK_NULL); 4618 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4619 CHECK_NULL); 4620 names_h->obj_at_put(0, name0()); 4621 names_h->obj_at_put(1, name1()); 4622 break; 4623 } 4624 case JAVA_THREAD_STATE_TIMED_WAITING : { 4625 assert(values_h->length() == 3 && 4626 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4627 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4628 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4629 "Invalid threadStatus value"); 4630 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4631 3, /* number of substates */ 4632 CHECK_NULL); 4633 names_h = objArrayHandle(THREAD, r); 4634 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4635 CHECK_NULL); 4636 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4637 CHECK_NULL); 4638 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4639 CHECK_NULL); 4640 names_h->obj_at_put(0, name0()); 4641 names_h->obj_at_put(1, name1()); 4642 names_h->obj_at_put(2, name2()); 4643 break; 4644 } 4645 case JAVA_THREAD_STATE_TERMINATED : { 4646 assert(values_h->length() == 1 && 4647 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4648 "Invalid threadStatus value"); 4649 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4650 1, /* only 1 substate */ 4651 CHECK_NULL); 4652 names_h = objArrayHandle(THREAD, r); 4653 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4654 names_h->obj_at_put(0, name()); 4655 break; 4656 } 4657 default: 4658 // Unknown state - probably incompatible JDK version 4659 return NULL; 4660 } 4661 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4662 } 4663 JVM_END 4664 4665 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4666 { 4667 memset(info, 0, sizeof(info_size)); 4668 4669 info->jvm_version = Abstract_VM_Version::jvm_version(); 4670 info->update_version = 0; /* 0 in HotSpot Express VM */ 4671 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4672 4673 // when we add a new capability in the jvm_version_info struct, we should also 4674 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4675 // counter defined in runtimeService.cpp. 4676 info->is_attachable = AttachListener::is_attach_supported(); 4677 #ifdef KERNEL 4678 info->is_kernel_jvm = 1; // true; 4679 #else // KERNEL 4680 info->is_kernel_jvm = 0; // false; 4681 #endif // KERNEL 4682 } 4683 JVM_END