1 /* 2 * Copyright (c) 1997, 2014, 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 "interpreter/bytecode.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/objArrayKlass.hpp" 39 #include "oops/method.hpp" 40 #include "prims/jvm.h" 41 #include "prims/jvm_misc.hpp" 42 #include "prims/jvmtiExport.hpp" 43 #include "prims/jvmtiThreadState.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "prims/privilegedStack.hpp" 46 #include "runtime/arguments.hpp" 47 #include "runtime/dtraceJSDT.hpp" 48 #include "runtime/handles.inline.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/jfieldIDWorkaround.hpp" 54 #include "runtime/os.hpp" 55 #include "runtime/perfData.hpp" 56 #include "runtime/reflection.hpp" 57 #include "runtime/vframe.hpp" 58 #include "runtime/vm_operations.hpp" 59 #include "services/attachListener.hpp" 60 #include "services/management.hpp" 61 #include "services/threadService.hpp" 62 #include "trace/tracing.hpp" 63 #include "utilities/copy.hpp" 64 #include "utilities/defaultStream.hpp" 65 #include "utilities/dtrace.hpp" 66 #include "utilities/events.hpp" 67 #include "utilities/histogram.hpp" 68 #include "utilities/top.hpp" 69 #include "utilities/utf8.hpp" 70 #ifdef TARGET_OS_FAMILY_linux 71 # include "jvm_linux.h" 72 #endif 73 #ifdef TARGET_OS_FAMILY_solaris 74 # include "jvm_solaris.h" 75 #endif 76 #ifdef TARGET_OS_FAMILY_windows 77 # include "jvm_windows.h" 78 #endif 79 #ifdef TARGET_OS_FAMILY_aix 80 # include "jvm_aix.h" 81 #endif 82 #ifdef TARGET_OS_FAMILY_bsd 83 # include "jvm_bsd.h" 84 #endif 85 86 #include <errno.h> 87 88 /* 89 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 90 such ctors and calls MUST NOT come between an oop declaration/init and its 91 usage because if objects are move this may cause various memory stomps, bus 92 errors and segfaults. Here is a cookbook for causing so called "naked oop 93 failures": 94 95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 96 JVMWrapper("JVM_GetClassDeclaredFields"); 97 98 // Object address to be held directly in mirror & not visible to GC 99 oop mirror = JNIHandles::resolve_non_null(ofClass); 100 101 // If this ctor can hit a safepoint, moving objects around, then 102 ComplexConstructor foo; 103 104 // Boom! mirror may point to JUNK instead of the intended object 105 (some dereference of mirror) 106 107 // Here's another call that may block for GC, making mirror stale 108 MutexLocker ml(some_lock); 109 110 // And here's an initializer that can result in a stale oop 111 // all in one step. 112 oop o = call_that_can_throw_exception(TRAPS); 113 114 115 The solution is to keep the oop declaration BELOW the ctor or function 116 call that might cause a GC, do another resolve to reassign the oop, or 117 consider use of a Handle instead of an oop so there is immunity from object 118 motion. But note that the "QUICK" entries below do not have a handlemark 119 and thus can only support use of handles passed in. 120 */ 121 122 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 123 ResourceMark rm; 124 int line_number = -1; 125 const char * source_file = NULL; 126 const char * trace = "explicit"; 127 InstanceKlass* caller = NULL; 128 JavaThread* jthread = JavaThread::current(); 129 if (jthread->has_last_Java_frame()) { 130 vframeStream vfst(jthread); 131 132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 134 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 136 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 137 138 Method* last_caller = NULL; 139 140 while (!vfst.at_end()) { 141 Method* m = vfst.method(); 142 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 143 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 144 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 145 break; 146 } 147 last_caller = m; 148 vfst.next(); 149 } 150 // if this is called from Class.forName0 and that is called from Class.forName, 151 // then print the caller of Class.forName. If this is Class.loadClass, then print 152 // that caller, otherwise keep quiet since this should be picked up elsewhere. 153 bool found_it = false; 154 if (!vfst.at_end() && 155 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 156 vfst.method()->name() == vmSymbols::forName0_name()) { 157 vfst.next(); 158 if (!vfst.at_end() && 159 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 160 vfst.method()->name() == vmSymbols::forName_name()) { 161 vfst.next(); 162 found_it = true; 163 } 164 } else if (last_caller != NULL && 165 last_caller->method_holder()->name() == 166 vmSymbols::java_lang_ClassLoader() && 167 (last_caller->name() == vmSymbols::loadClassInternal_name() || 168 last_caller->name() == vmSymbols::loadClass_name())) { 169 found_it = true; 170 } else if (!vfst.at_end()) { 171 if (vfst.method()->is_native()) { 172 // JNI call 173 found_it = true; 174 } 175 } 176 if (found_it && !vfst.at_end()) { 177 // found the caller 178 caller = vfst.method()->method_holder(); 179 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 180 if (line_number == -1) { 181 // show method name if it's a native method 182 trace = vfst.method()->name_and_sig_as_C_string(); 183 } 184 Symbol* s = caller->source_file_name(); 185 if (s != NULL) { 186 source_file = s->as_C_string(); 187 } 188 } 189 } 190 if (caller != NULL) { 191 if (to_class != caller) { 192 const char * from = caller->external_name(); 193 const char * to = to_class->external_name(); 194 // print in a single call to reduce interleaving between threads 195 if (source_file != NULL) { 196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 197 } else { 198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 199 } 200 } 201 } 202 } 203 204 void trace_class_resolution(Klass* to_class) { 205 EXCEPTION_MARK; 206 trace_class_resolution_impl(to_class, THREAD); 207 if (HAS_PENDING_EXCEPTION) { 208 CLEAR_PENDING_EXCEPTION; 209 } 210 } 211 212 // Wrapper to trace JVM functions 213 214 #ifdef ASSERT 215 class JVMTraceWrapper : public StackObj { 216 public: 217 JVMTraceWrapper(const char* format, ...) { 218 if (TraceJVMCalls) { 219 va_list ap; 220 va_start(ap, format); 221 tty->print("JVM "); 222 tty->vprint_cr(format, ap); 223 va_end(ap); 224 } 225 } 226 }; 227 228 Histogram* JVMHistogram; 229 volatile jint JVMHistogram_lock = 0; 230 231 class JVMHistogramElement : public HistogramElement { 232 public: 233 JVMHistogramElement(const char* name); 234 }; 235 236 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 237 _name = elementName; 238 uintx count = 0; 239 240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 242 count +=1; 243 if ( (WarnOnStalledSpinLock > 0) 244 && (count % WarnOnStalledSpinLock == 0)) { 245 warning("JVMHistogram_lock seems to be stalled"); 246 } 247 } 248 } 249 250 if(JVMHistogram == NULL) 251 JVMHistogram = new Histogram("JVM Call Counts",100); 252 253 JVMHistogram->add_element(this); 254 Atomic::dec(&JVMHistogram_lock); 255 } 256 257 #define JVMCountWrapper(arg) \ 258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 260 261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 265 #else 266 #define JVMWrapper(arg1) 267 #define JVMWrapper2(arg1, arg2) 268 #define JVMWrapper3(arg1, arg2, arg3) 269 #define JVMWrapper4(arg1, arg2, arg3, arg4) 270 #endif 271 272 273 // Interface version ///////////////////////////////////////////////////////////////////// 274 275 276 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 277 return JVM_INTERFACE_VERSION; 278 JVM_END 279 280 281 // java.lang.System ////////////////////////////////////////////////////////////////////// 282 283 284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 285 JVMWrapper("JVM_CurrentTimeMillis"); 286 return os::javaTimeMillis(); 287 JVM_END 288 289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 290 JVMWrapper("JVM_NanoTime"); 291 return os::javaTimeNanos(); 292 JVM_END 293 294 295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 296 jobject dst, jint dst_pos, jint length)) 297 JVMWrapper("JVM_ArrayCopy"); 298 // Check if we have null pointers 299 if (src == NULL || dst == NULL) { 300 THROW(vmSymbols::java_lang_NullPointerException()); 301 } 302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 306 // Do copy 307 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 308 JVM_END 309 310 311 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 312 JavaValue r(T_OBJECT); 313 // public synchronized Object put(Object key, Object value); 314 HandleMark hm(THREAD); 315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 317 JavaCalls::call_virtual(&r, 318 props, 319 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 320 vmSymbols::put_name(), 321 vmSymbols::object_object_object_signature(), 322 key_str, 323 value_str, 324 THREAD); 325 } 326 327 328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 329 330 331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 332 JVMWrapper("JVM_InitProperties"); 333 ResourceMark rm; 334 335 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 336 337 // System property list includes both user set via -D option and 338 // jvm system specific properties. 339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 340 PUTPROP(props, p->key(), p->value()); 341 } 342 343 // Convert the -XX:MaxDirectMemorySize= command line flag 344 // to the sun.nio.MaxDirectMemorySize property. 345 // Do this after setting user properties to prevent people 346 // from setting the value with a -D option, as requested. 347 { 348 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 349 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 350 } else { 351 char as_chars[256]; 352 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 353 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 354 } 355 } 356 357 // JVM monitoring and management support 358 // Add the sun.management.compiler property for the compiler's name 359 { 360 #undef CSIZE 361 #if defined(_LP64) || defined(_WIN64) 362 #define CSIZE "64-Bit " 363 #else 364 #define CSIZE 365 #endif // 64bit 366 367 #ifdef TIERED 368 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 369 #else 370 #if defined(COMPILER1) 371 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 372 #elif defined(COMPILER2) 373 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 374 #else 375 const char* compiler_name = ""; 376 #endif // compilers 377 #endif // TIERED 378 379 if (*compiler_name != '\0' && 380 (Arguments::mode() != Arguments::_int)) { 381 PUTPROP(props, "sun.management.compiler", compiler_name); 382 } 383 } 384 385 return properties; 386 JVM_END 387 388 389 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 390 391 extern volatile jint vm_created; 392 393 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 394 if (vm_created != 0 && (code == 0)) { 395 // The VM is about to exit. We call back into Java to check whether finalizers should be run 396 Universe::run_finalizers_on_exit(); 397 } 398 before_exit(thread); 399 vm_exit(code); 400 JVM_END 401 402 403 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 404 before_exit(thread); 405 vm_exit(code); 406 JVM_END 407 408 409 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 410 register_on_exit_function(func); 411 JVM_END 412 413 414 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 415 JVMWrapper("JVM_GC"); 416 if (!DisableExplicitGC) { 417 Universe::heap()->collect(GCCause::_java_lang_system_gc); 418 } 419 JVM_END 420 421 422 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 423 JVMWrapper("JVM_MaxObjectInspectionAge"); 424 return Universe::heap()->millis_since_last_gc(); 425 JVM_END 426 427 428 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 429 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 430 JVM_END 431 432 433 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 434 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 435 JVM_END 436 437 static inline jlong convert_size_t_to_jlong(size_t val) { 438 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 439 NOT_LP64 (return (jlong)val;) 440 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 441 } 442 443 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 444 JVMWrapper("JVM_TotalMemory"); 445 size_t n = Universe::heap()->capacity(); 446 return convert_size_t_to_jlong(n); 447 JVM_END 448 449 450 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 451 JVMWrapper("JVM_FreeMemory"); 452 CollectedHeap* ch = Universe::heap(); 453 size_t n; 454 { 455 MutexLocker x(Heap_lock); 456 n = ch->capacity() - ch->used(); 457 } 458 return convert_size_t_to_jlong(n); 459 JVM_END 460 461 462 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 463 JVMWrapper("JVM_MaxMemory"); 464 size_t n = Universe::heap()->max_capacity(); 465 return convert_size_t_to_jlong(n); 466 JVM_END 467 468 469 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 470 JVMWrapper("JVM_ActiveProcessorCount"); 471 return os::active_processor_count(); 472 JVM_END 473 474 475 476 // java.lang.Throwable ////////////////////////////////////////////////////// 477 478 479 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 480 JVMWrapper("JVM_FillInStackTrace"); 481 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 482 java_lang_Throwable::fill_in_stack_trace(exception); 483 JVM_END 484 485 486 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 487 JVMWrapper("JVM_GetStackTraceDepth"); 488 oop exception = JNIHandles::resolve(throwable); 489 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 490 JVM_END 491 492 493 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 494 JVMWrapper("JVM_GetStackTraceElement"); 495 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 496 oop exception = JNIHandles::resolve(throwable); 497 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 498 return JNIHandles::make_local(env, element); 499 JVM_END 500 501 502 // java.lang.Object /////////////////////////////////////////////// 503 504 505 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 506 JVMWrapper("JVM_IHashCode"); 507 // as implemented in the classic virtual machine; return 0 if object is NULL 508 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 509 JVM_END 510 511 512 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 513 JVMWrapper("JVM_MonitorWait"); 514 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 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 // The current thread already owns the monitor and it has not yet 520 // been added to the wait queue so the current thread cannot be 521 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT 522 // event handler cannot accidentally consume an unpark() meant for 523 // the ParkEvent associated with this ObjectMonitor. 524 } 525 ObjectSynchronizer::wait(obj, ms, CHECK); 526 JVM_END 527 528 529 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 530 JVMWrapper("JVM_MonitorNotify"); 531 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 532 ObjectSynchronizer::notify(obj, CHECK); 533 JVM_END 534 535 536 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 537 JVMWrapper("JVM_MonitorNotifyAll"); 538 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 539 ObjectSynchronizer::notifyall(obj, CHECK); 540 JVM_END 541 542 543 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 544 JVMWrapper("JVM_Clone"); 545 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 546 const KlassHandle klass (THREAD, obj->klass()); 547 JvmtiVMObjectAllocEventCollector oam; 548 549 #ifdef ASSERT 550 // Just checking that the cloneable flag is set correct 551 if (obj->is_array()) { 552 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 553 } else { 554 guarantee(obj->is_instance(), "should be instanceOop"); 555 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 556 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 557 } 558 #endif 559 560 // Check if class of obj supports the Cloneable interface. 561 // All arrays are considered to be cloneable (See JLS 20.1.5) 562 if (!klass->is_cloneable()) { 563 ResourceMark rm(THREAD); 564 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 565 } 566 567 // Make shallow object copy 568 const int size = obj->size(); 569 oop new_obj = NULL; 570 if (obj->is_array()) { 571 const int length = ((arrayOop)obj())->length(); 572 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 573 } else { 574 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 575 } 576 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 577 // is modifying a reference field in the clonee, a non-oop-atomic copy might 578 // be suspended in the middle of copying the pointer and end up with parts 579 // of two different pointers in the field. Subsequent dereferences will crash. 580 // 4846409: an oop-copy of objects with long or double fields or arrays of same 581 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 582 // of oops. We know objects are aligned on a minimum of an jlong boundary. 583 // The same is true of StubRoutines::object_copy and the various oop_copy 584 // variants, and of the code generated by the inline_native_clone intrinsic. 585 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 586 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 587 (size_t)align_object_size(size) / HeapWordsPerLong); 588 // Clear the header 589 new_obj->init_mark(); 590 591 // Store check (mark entire object and let gc sort it out) 592 BarrierSet* bs = Universe::heap()->barrier_set(); 593 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 594 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 595 596 // Caution: this involves a java upcall, so the clone should be 597 // "gc-robust" by this stage. 598 if (klass->has_finalizer()) { 599 assert(obj->is_instance(), "should be instanceOop"); 600 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 601 } 602 603 return JNIHandles::make_local(env, oop(new_obj)); 604 JVM_END 605 606 // java.lang.Compiler //////////////////////////////////////////////////// 607 608 // The initial cuts of the HotSpot VM will not support JITs, and all existing 609 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 610 // functions are all silently ignored unless JVM warnings are printed. 611 612 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 613 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 614 JVM_END 615 616 617 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 618 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 619 return JNI_FALSE; 620 JVM_END 621 622 623 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 624 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 625 return JNI_FALSE; 626 JVM_END 627 628 629 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 630 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 631 return JNI_FALSE; 632 JVM_END 633 634 635 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 636 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 637 return NULL; 638 JVM_END 639 640 641 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 642 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 643 JVM_END 644 645 646 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 647 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 648 JVM_END 649 650 651 652 // Error message support ////////////////////////////////////////////////////// 653 654 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 655 JVMWrapper("JVM_GetLastErrorString"); 656 return (jint)os::lasterror(buf, len); 657 JVM_END 658 659 660 // java.io.File /////////////////////////////////////////////////////////////// 661 662 JVM_LEAF(char*, JVM_NativePath(char* path)) 663 JVMWrapper2("JVM_NativePath (%s)", path); 664 return os::native_path(path); 665 JVM_END 666 667 668 // Misc. class handling /////////////////////////////////////////////////////////// 669 670 671 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 672 JVMWrapper("JVM_GetCallerClass"); 673 674 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or 675 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided 676 // temporarily for existing code to use until a replacement API is defined. 677 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { 678 Klass* k = thread->security_get_caller_class(depth); 679 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 680 } 681 682 // Getting the class of the caller frame. 683 // 684 // The call stack at this point looks something like this: 685 // 686 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 687 // [1] [ @CallerSensitive API.method ] 688 // [.] [ (skipped intermediate frames) ] 689 // [n] [ caller ] 690 vframeStream vfst(thread); 691 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 692 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 693 Method* m = vfst.method(); 694 assert(m != NULL, "sanity"); 695 switch (n) { 696 case 0: 697 // This must only be called from Reflection.getCallerClass 698 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 699 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 700 } 701 // fall-through 702 case 1: 703 // Frame 0 and 1 must be caller sensitive. 704 if (!m->caller_sensitive()) { 705 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 706 } 707 break; 708 default: 709 if (!m->is_ignored_by_security_stack_walk()) { 710 // We have reached the desired frame; return the holder class. 711 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 712 } 713 break; 714 } 715 } 716 return NULL; 717 JVM_END 718 719 720 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 721 JVMWrapper("JVM_FindPrimitiveClass"); 722 oop mirror = NULL; 723 BasicType t = name2type(utf); 724 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 725 mirror = Universe::java_mirror(t); 726 } 727 if (mirror == NULL) { 728 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 729 } else { 730 return (jclass) JNIHandles::make_local(env, mirror); 731 } 732 JVM_END 733 734 735 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 736 JVMWrapper("JVM_ResolveClass"); 737 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 738 JVM_END 739 740 741 // Returns a class loaded by the bootstrap class loader; or null 742 // if not found. ClassNotFoundException is not thrown. 743 // 744 // Rationale behind JVM_FindClassFromBootLoader 745 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 746 // b> because of (a) java.dll has a direct dependecy on the unexported 747 // private symbol "_JVM_FindClassFromClassLoader@20". 748 // c> the launcher cannot use the private symbol as it dynamically opens 749 // the entry point, so if something changes, the launcher will fail 750 // unexpectedly at runtime, it is safest for the launcher to dlopen a 751 // stable exported interface. 752 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 753 // signature to change from _JVM_FindClassFromClassLoader@20 to 754 // JVM_FindClassFromClassLoader and will not be backward compatible 755 // with older JDKs. 756 // Thus a public/stable exported entry point is the right solution, 757 // public here means public in linker semantics, and is exported only 758 // to the JDK, and is not intended to be a public API. 759 760 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 761 const char* name)) 762 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 763 764 // Java libraries should ensure that name is never null... 765 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 766 // It's impossible to create this class; the name cannot fit 767 // into the constant pool. 768 return NULL; 769 } 770 771 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 772 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 773 if (k == NULL) { 774 return NULL; 775 } 776 777 if (TraceClassResolution) { 778 trace_class_resolution(k); 779 } 780 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 781 JVM_END 782 783 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 784 jboolean init, jobject loader, 785 jboolean throwError)) 786 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 787 throwError ? "error" : "exception"); 788 // Java libraries should ensure that name is never null... 789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 790 // It's impossible to create this class; the name cannot fit 791 // into the constant pool. 792 if (throwError) { 793 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 794 } else { 795 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 796 } 797 } 798 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 799 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 800 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 801 Handle(), throwError, THREAD); 802 803 if (TraceClassResolution && result != NULL) { 804 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 805 } 806 return result; 807 JVM_END 808 809 810 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 811 jboolean init, jclass from)) 812 JVMWrapper2("JVM_FindClassFromClass %s", name); 813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 814 // It's impossible to create this class; the name cannot fit 815 // into the constant pool. 816 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 817 } 818 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 819 oop from_class_oop = JNIHandles::resolve(from); 820 Klass* from_class = (from_class_oop == NULL) 821 ? (Klass*)NULL 822 : java_lang_Class::as_Klass(from_class_oop); 823 oop class_loader = NULL; 824 oop protection_domain = NULL; 825 if (from_class != NULL) { 826 class_loader = from_class->class_loader(); 827 protection_domain = from_class->protection_domain(); 828 } 829 Handle h_loader(THREAD, class_loader); 830 Handle h_prot (THREAD, protection_domain); 831 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 832 h_prot, true, thread); 833 834 if (TraceClassResolution && result != NULL) { 835 // this function is generally only used for class loading during verification. 836 ResourceMark rm; 837 oop from_mirror = JNIHandles::resolve_non_null(from); 838 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 839 const char * from_name = from_class->external_name(); 840 841 oop mirror = JNIHandles::resolve_non_null(result); 842 Klass* to_class = java_lang_Class::as_Klass(mirror); 843 const char * to = to_class->external_name(); 844 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 845 } 846 847 return result; 848 JVM_END 849 850 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 851 if (loader.is_null()) { 852 return; 853 } 854 855 // check whether the current caller thread holds the lock or not. 856 // If not, increment the corresponding counter 857 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 858 ObjectSynchronizer::owner_self) { 859 counter->inc(); 860 } 861 } 862 863 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 864 // and JVM_DefineClassWithSourceCond() 865 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 866 jobject loader, const jbyte *buf, 867 jsize len, jobject pd, const char *source, 868 jboolean verify, TRAPS) { 869 if (source == NULL) source = "__JVM_DefineClass__"; 870 871 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 872 JavaThread* jt = (JavaThread*) THREAD; 873 874 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 875 ClassLoader::perf_define_appclass_selftime(), 876 ClassLoader::perf_define_appclasses(), 877 jt->get_thread_stat()->perf_recursion_counts_addr(), 878 jt->get_thread_stat()->perf_timers_addr(), 879 PerfClassTraceTime::DEFINE_CLASS); 880 881 if (UsePerfData) { 882 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 883 } 884 885 // Since exceptions can be thrown, class initialization can take place 886 // if name is NULL no check for class name in .class stream has to be made. 887 TempNewSymbol class_name = NULL; 888 if (name != NULL) { 889 const int str_len = (int)strlen(name); 890 if (str_len > Symbol::max_length()) { 891 // It's impossible to create this class; the name cannot fit 892 // into the constant pool. 893 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 894 } 895 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 896 } 897 898 ResourceMark rm(THREAD); 899 ClassFileStream st((u1*) buf, len, (char *)source); 900 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 901 if (UsePerfData) { 902 is_lock_held_by_thread(class_loader, 903 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 904 THREAD); 905 } 906 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 907 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 908 protection_domain, &st, 909 verify != 0, 910 CHECK_NULL); 911 912 if (TraceClassResolution && k != NULL) { 913 trace_class_resolution(k); 914 } 915 916 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 917 } 918 919 920 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 921 JVMWrapper2("JVM_DefineClass %s", name); 922 923 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 924 JVM_END 925 926 927 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 928 JVMWrapper2("JVM_DefineClassWithSource %s", name); 929 930 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 931 JVM_END 932 933 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 934 jobject loader, const jbyte *buf, 935 jsize len, jobject pd, 936 const char *source, jboolean verify)) 937 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 938 939 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 940 JVM_END 941 942 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 943 JVMWrapper("JVM_FindLoadedClass"); 944 ResourceMark rm(THREAD); 945 946 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 947 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 948 949 const char* str = java_lang_String::as_utf8_string(string()); 950 // Sanity check, don't expect null 951 if (str == NULL) return NULL; 952 953 const int str_len = (int)strlen(str); 954 if (str_len > Symbol::max_length()) { 955 // It's impossible to create this class; the name cannot fit 956 // into the constant pool. 957 return NULL; 958 } 959 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 960 961 // Security Note: 962 // The Java level wrapper will perform the necessary security check allowing 963 // us to pass the NULL as the initiating class loader. 964 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 965 if (UsePerfData) { 966 is_lock_held_by_thread(h_loader, 967 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 968 THREAD); 969 } 970 971 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 972 h_loader, 973 Handle(), 974 CHECK_NULL); 975 976 return (k == NULL) ? NULL : 977 (jclass) JNIHandles::make_local(env, k->java_mirror()); 978 JVM_END 979 980 981 // Reflection support ////////////////////////////////////////////////////////////////////////////// 982 983 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 984 assert (cls != NULL, "illegal class"); 985 JVMWrapper("JVM_GetClassName"); 986 JvmtiVMObjectAllocEventCollector oam; 987 ResourceMark rm(THREAD); 988 const char* name; 989 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 990 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 991 } else { 992 // Consider caching interned string in Klass 993 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 994 assert(k->is_klass(), "just checking"); 995 name = k->external_name(); 996 } 997 oop result = StringTable::intern((char*) name, CHECK_NULL); 998 return (jstring) JNIHandles::make_local(env, result); 999 JVM_END 1000 1001 1002 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1003 JVMWrapper("JVM_GetClassInterfaces"); 1004 JvmtiVMObjectAllocEventCollector oam; 1005 oop mirror = JNIHandles::resolve_non_null(cls); 1006 1007 // Special handling for primitive objects 1008 if (java_lang_Class::is_primitive(mirror)) { 1009 // Primitive objects does not have any interfaces 1010 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1011 return (jobjectArray) JNIHandles::make_local(env, r); 1012 } 1013 1014 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1015 // Figure size of result array 1016 int size; 1017 if (klass->oop_is_instance()) { 1018 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1019 } else { 1020 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1021 size = 2; 1022 } 1023 1024 // Allocate result array 1025 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1026 objArrayHandle result (THREAD, r); 1027 // Fill in result 1028 if (klass->oop_is_instance()) { 1029 // Regular instance klass, fill in all local interfaces 1030 for (int index = 0; index < size; index++) { 1031 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1032 result->obj_at_put(index, k->java_mirror()); 1033 } 1034 } else { 1035 // All arrays implement java.lang.Cloneable and java.io.Serializable 1036 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1037 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1038 } 1039 return (jobjectArray) JNIHandles::make_local(env, result()); 1040 JVM_END 1041 1042 1043 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1044 JVMWrapper("JVM_GetClassLoader"); 1045 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1046 return NULL; 1047 } 1048 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1049 oop loader = k->class_loader(); 1050 return JNIHandles::make_local(env, loader); 1051 JVM_END 1052 1053 1054 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1055 JVMWrapper("JVM_IsInterface"); 1056 oop mirror = JNIHandles::resolve_non_null(cls); 1057 if (java_lang_Class::is_primitive(mirror)) { 1058 return JNI_FALSE; 1059 } 1060 Klass* k = java_lang_Class::as_Klass(mirror); 1061 jboolean result = k->is_interface(); 1062 assert(!result || k->oop_is_instance(), 1063 "all interfaces are instance types"); 1064 // The compiler intrinsic for isInterface tests the 1065 // Klass::_access_flags bits in the same way. 1066 return result; 1067 JVM_END 1068 1069 1070 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1071 JVMWrapper("JVM_GetClassSigners"); 1072 JvmtiVMObjectAllocEventCollector oam; 1073 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1074 // There are no signers for primitive types 1075 return NULL; 1076 } 1077 1078 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1079 1080 // If there are no signers set in the class, or if the class 1081 // is an array, return NULL. 1082 if (signers == NULL) return NULL; 1083 1084 // copy of the signers array 1085 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1086 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1087 for (int index = 0; index < signers->length(); index++) { 1088 signers_copy->obj_at_put(index, signers->obj_at(index)); 1089 } 1090 1091 // return the copy 1092 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1093 JVM_END 1094 1095 1096 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1097 JVMWrapper("JVM_SetClassSigners"); 1098 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1099 // This call is ignored for primitive types and arrays. 1100 // Signers are only set once, ClassLoader.java, and thus shouldn't 1101 // be called with an array. Only the bootstrap loader creates arrays. 1102 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1103 if (k->oop_is_instance()) { 1104 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1105 } 1106 } 1107 JVM_END 1108 1109 1110 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1111 JVMWrapper("JVM_GetProtectionDomain"); 1112 if (JNIHandles::resolve(cls) == NULL) { 1113 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1114 } 1115 1116 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1117 // Primitive types does not have a protection domain. 1118 return NULL; 1119 } 1120 1121 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1122 return (jobject) JNIHandles::make_local(env, pd); 1123 JVM_END 1124 1125 1126 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { 1127 // If there is a security manager and protection domain, check the access 1128 // in the protection domain, otherwise it is authorized. 1129 if (java_lang_System::has_security_manager()) { 1130 1131 // For bootstrapping, if pd implies method isn't in the JDK, allow 1132 // this context to revert to older behavior. 1133 // In this case the isAuthorized field in AccessControlContext is also not 1134 // present. 1135 if (Universe::protection_domain_implies_method() == NULL) { 1136 return true; 1137 } 1138 1139 // Whitelist certain access control contexts 1140 if (java_security_AccessControlContext::is_authorized(context)) { 1141 return true; 1142 } 1143 1144 oop prot = klass->protection_domain(); 1145 if (prot != NULL) { 1146 // Call pd.implies(new SecurityPermission("createAccessControlContext")) 1147 // in the new wrapper. 1148 methodHandle m(THREAD, Universe::protection_domain_implies_method()); 1149 Handle h_prot(THREAD, prot); 1150 JavaValue result(T_BOOLEAN); 1151 JavaCallArguments args(h_prot); 1152 JavaCalls::call(&result, m, &args, CHECK_false); 1153 return (result.get_jboolean() != 0); 1154 } 1155 } 1156 return true; 1157 } 1158 1159 // Create an AccessControlContext with a protection domain with null codesource 1160 // and null permissions - which gives no permissions. 1161 oop create_dummy_access_control_context(TRAPS) { 1162 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); 1163 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL); 1164 // Call constructor ProtectionDomain(null, null); 1165 JavaValue result(T_VOID); 1166 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass), 1167 vmSymbols::object_initializer_name(), 1168 vmSymbols::codesource_permissioncollection_signature(), 1169 Handle(), Handle(), CHECK_NULL); 1170 1171 // new ProtectionDomain[] {pd}; 1172 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1173 context->obj_at_put(0, obj()); 1174 1175 // new AccessControlContext(new ProtectionDomain[] {pd}) 1176 objArrayHandle h_context(THREAD, context); 1177 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1178 return acc; 1179 } 1180 1181 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1182 JVMWrapper("JVM_DoPrivileged"); 1183 1184 if (action == NULL) { 1185 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1186 } 1187 1188 // Compute the frame initiating the do privileged operation and setup the privileged stack 1189 vframeStream vfst(thread); 1190 vfst.security_get_caller_frame(1); 1191 1192 if (vfst.at_end()) { 1193 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1194 } 1195 1196 Method* method = vfst.method(); 1197 instanceKlassHandle klass (THREAD, method->method_holder()); 1198 1199 // Check that action object understands "Object run()" 1200 Handle h_context; 1201 if (context != NULL) { 1202 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1203 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1204 if (!authorized) { 1205 // Create an unprivileged access control object and call it's run function 1206 // instead. 1207 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1208 h_context = Handle(THREAD, noprivs); 1209 } 1210 } 1211 1212 // Check that action object understands "Object run()" 1213 Handle object (THREAD, JNIHandles::resolve(action)); 1214 1215 // get run() method 1216 Method* m_oop = object->klass()->uncached_lookup_method( 1217 vmSymbols::run_method_name(), 1218 vmSymbols::void_object_signature(), 1219 false); 1220 methodHandle m (THREAD, m_oop); 1221 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1222 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1223 } 1224 1225 // Stack allocated list of privileged stack elements 1226 PrivilegedElement pi; 1227 if (!vfst.at_end()) { 1228 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1229 thread->set_privileged_stack_top(&pi); 1230 } 1231 1232 1233 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1234 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1235 Handle pending_exception; 1236 JavaValue result(T_OBJECT); 1237 JavaCallArguments args(object); 1238 JavaCalls::call(&result, m, &args, THREAD); 1239 1240 // done with action, remove ourselves from the list 1241 if (!vfst.at_end()) { 1242 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1243 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1244 } 1245 1246 if (HAS_PENDING_EXCEPTION) { 1247 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1248 CLEAR_PENDING_EXCEPTION; 1249 // JVMTI has already reported the pending exception 1250 // JVMTI internal flag reset is needed in order to report PrivilegedActionException 1251 if (THREAD->is_Java_thread()) { 1252 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 1253 } 1254 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1255 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1256 // Throw a java.security.PrivilegedActionException(Exception e) exception 1257 JavaCallArguments args(pending_exception); 1258 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1259 vmSymbols::exception_void_signature(), 1260 &args); 1261 } 1262 } 1263 1264 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1265 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1266 JVM_END 1267 1268 1269 // Returns the inherited_access_control_context field of the running thread. 1270 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1271 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1272 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1273 return JNIHandles::make_local(env, result); 1274 JVM_END 1275 1276 class RegisterArrayForGC { 1277 private: 1278 JavaThread *_thread; 1279 public: 1280 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1281 _thread = thread; 1282 _thread->register_array_for_gc(array); 1283 } 1284 1285 ~RegisterArrayForGC() { 1286 _thread->register_array_for_gc(NULL); 1287 } 1288 }; 1289 1290 1291 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1292 JVMWrapper("JVM_GetStackAccessControlContext"); 1293 if (!UsePrivilegedStack) return NULL; 1294 1295 ResourceMark rm(THREAD); 1296 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1297 JvmtiVMObjectAllocEventCollector oam; 1298 1299 // count the protection domains on the execution stack. We collapse 1300 // duplicate consecutive protection domains into a single one, as 1301 // well as stopping when we hit a privileged frame. 1302 1303 // Use vframeStream to iterate through Java frames 1304 vframeStream vfst(thread); 1305 1306 oop previous_protection_domain = NULL; 1307 Handle privileged_context(thread, NULL); 1308 bool is_privileged = false; 1309 oop protection_domain = NULL; 1310 1311 for(; !vfst.at_end(); vfst.next()) { 1312 // get method of frame 1313 Method* method = vfst.method(); 1314 intptr_t* frame_id = vfst.frame_id(); 1315 1316 // check the privileged frames to see if we have a match 1317 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1318 // this frame is privileged 1319 is_privileged = true; 1320 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1321 protection_domain = thread->privileged_stack_top()->protection_domain(); 1322 } else { 1323 protection_domain = method->method_holder()->protection_domain(); 1324 } 1325 1326 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1327 local_array->push(protection_domain); 1328 previous_protection_domain = protection_domain; 1329 } 1330 1331 if (is_privileged) break; 1332 } 1333 1334 1335 // either all the domains on the stack were system domains, or 1336 // we had a privileged system domain 1337 if (local_array->is_empty()) { 1338 if (is_privileged && privileged_context.is_null()) return NULL; 1339 1340 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1341 return JNIHandles::make_local(env, result); 1342 } 1343 1344 // the resource area must be registered in case of a gc 1345 RegisterArrayForGC ragc(thread, local_array); 1346 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1347 local_array->length(), CHECK_NULL); 1348 objArrayHandle h_context(thread, context); 1349 for (int index = 0; index < local_array->length(); index++) { 1350 h_context->obj_at_put(index, local_array->at(index)); 1351 } 1352 1353 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1354 1355 return JNIHandles::make_local(env, result); 1356 JVM_END 1357 1358 1359 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1360 JVMWrapper("JVM_IsArrayClass"); 1361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1362 return (k != NULL) && k->oop_is_array() ? true : false; 1363 JVM_END 1364 1365 1366 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1367 JVMWrapper("JVM_IsPrimitiveClass"); 1368 oop mirror = JNIHandles::resolve_non_null(cls); 1369 return (jboolean) java_lang_Class::is_primitive(mirror); 1370 JVM_END 1371 1372 1373 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1374 JVMWrapper("JVM_GetComponentType"); 1375 oop mirror = JNIHandles::resolve_non_null(cls); 1376 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1377 return (jclass) JNIHandles::make_local(env, result); 1378 JVM_END 1379 1380 1381 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1382 JVMWrapper("JVM_GetClassModifiers"); 1383 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1384 // Primitive type 1385 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1386 } 1387 1388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1389 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1390 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1391 return k->modifier_flags(); 1392 JVM_END 1393 1394 1395 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1396 1397 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1398 JvmtiVMObjectAllocEventCollector oam; 1399 // ofClass is a reference to a java_lang_Class object. The mirror object 1400 // of an InstanceKlass 1401 1402 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1403 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1404 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1405 return (jobjectArray)JNIHandles::make_local(env, result); 1406 } 1407 1408 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1409 InnerClassesIterator iter(k); 1410 1411 if (iter.length() == 0) { 1412 // Neither an inner nor outer class 1413 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1414 return (jobjectArray)JNIHandles::make_local(env, result); 1415 } 1416 1417 // find inner class info 1418 constantPoolHandle cp(thread, k->constants()); 1419 int length = iter.length(); 1420 1421 // Allocate temp. result array 1422 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1423 objArrayHandle result (THREAD, r); 1424 int members = 0; 1425 1426 for (; !iter.done(); iter.next()) { 1427 int ioff = iter.inner_class_info_index(); 1428 int ooff = iter.outer_class_info_index(); 1429 1430 if (ioff != 0 && ooff != 0) { 1431 // Check to see if the name matches the class we're looking for 1432 // before attempting to find the class. 1433 if (cp->klass_name_at_matches(k, ooff)) { 1434 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1435 if (outer_klass == k()) { 1436 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1437 instanceKlassHandle inner_klass (THREAD, ik); 1438 1439 // Throws an exception if outer klass has not declared k as 1440 // an inner klass 1441 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1442 1443 result->obj_at_put(members, inner_klass->java_mirror()); 1444 members++; 1445 } 1446 } 1447 } 1448 } 1449 1450 if (members != length) { 1451 // Return array of right length 1452 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1453 for(int i = 0; i < members; i++) { 1454 res->obj_at_put(i, result->obj_at(i)); 1455 } 1456 return (jobjectArray)JNIHandles::make_local(env, res); 1457 } 1458 1459 return (jobjectArray)JNIHandles::make_local(env, result()); 1460 JVM_END 1461 1462 1463 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1464 { 1465 // ofClass is a reference to a java_lang_Class object. 1466 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1467 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1468 return NULL; 1469 } 1470 1471 bool inner_is_member = false; 1472 Klass* outer_klass 1473 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1474 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1475 if (outer_klass == NULL) return NULL; // already a top-level class 1476 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1477 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1478 } 1479 JVM_END 1480 1481 // should be in InstanceKlass.cpp, but is here for historical reasons 1482 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1483 bool* inner_is_member, 1484 TRAPS) { 1485 Thread* thread = THREAD; 1486 InnerClassesIterator iter(k); 1487 if (iter.length() == 0) { 1488 // No inner class info => no declaring class 1489 return NULL; 1490 } 1491 1492 constantPoolHandle i_cp(thread, k->constants()); 1493 1494 bool found = false; 1495 Klass* ok; 1496 instanceKlassHandle outer_klass; 1497 *inner_is_member = false; 1498 1499 // Find inner_klass attribute 1500 for (; !iter.done() && !found; iter.next()) { 1501 int ioff = iter.inner_class_info_index(); 1502 int ooff = iter.outer_class_info_index(); 1503 int noff = iter.inner_name_index(); 1504 if (ioff != 0) { 1505 // Check to see if the name matches the class we're looking for 1506 // before attempting to find the class. 1507 if (i_cp->klass_name_at_matches(k, ioff)) { 1508 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1509 found = (k() == inner_klass); 1510 if (found && ooff != 0) { 1511 ok = i_cp->klass_at(ooff, CHECK_NULL); 1512 outer_klass = instanceKlassHandle(thread, ok); 1513 *inner_is_member = true; 1514 } 1515 } 1516 } 1517 } 1518 1519 if (found && outer_klass.is_null()) { 1520 // It may be anonymous; try for that. 1521 int encl_method_class_idx = k->enclosing_method_class_index(); 1522 if (encl_method_class_idx != 0) { 1523 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1524 outer_klass = instanceKlassHandle(thread, ok); 1525 *inner_is_member = false; 1526 } 1527 } 1528 1529 // If no inner class attribute found for this class. 1530 if (outer_klass.is_null()) return NULL; 1531 1532 // Throws an exception if outer klass has not declared k as an inner klass 1533 // We need evidence that each klass knows about the other, or else 1534 // the system could allow a spoof of an inner class to gain access rights. 1535 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1536 return outer_klass(); 1537 } 1538 1539 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1540 assert (cls != NULL, "illegal class"); 1541 JVMWrapper("JVM_GetClassSignature"); 1542 JvmtiVMObjectAllocEventCollector oam; 1543 ResourceMark rm(THREAD); 1544 // Return null for arrays and primatives 1545 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1547 if (k->oop_is_instance()) { 1548 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1549 if (sym == NULL) return NULL; 1550 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1551 return (jstring) JNIHandles::make_local(env, str()); 1552 } 1553 } 1554 return NULL; 1555 JVM_END 1556 1557 1558 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1559 assert (cls != NULL, "illegal class"); 1560 JVMWrapper("JVM_GetClassAnnotations"); 1561 1562 // Return null for arrays and primitives 1563 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1565 if (k->oop_is_instance()) { 1566 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1567 return (jbyteArray) JNIHandles::make_local(env, a); 1568 } 1569 } 1570 return NULL; 1571 JVM_END 1572 1573 1574 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1575 // some of this code was adapted from from jni_FromReflectedField 1576 1577 oop reflected = JNIHandles::resolve_non_null(field); 1578 oop mirror = java_lang_reflect_Field::clazz(reflected); 1579 Klass* k = java_lang_Class::as_Klass(mirror); 1580 int slot = java_lang_reflect_Field::slot(reflected); 1581 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1582 1583 KlassHandle kh(THREAD, k); 1584 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1585 1586 if (modifiers & JVM_ACC_STATIC) { 1587 // for static fields we only look in the current class 1588 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1589 assert(false, "cannot find static field"); 1590 return false; 1591 } 1592 } else { 1593 // for instance fields we start with the current class and work 1594 // our way up through the superclass chain 1595 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1596 assert(false, "cannot find instance field"); 1597 return false; 1598 } 1599 } 1600 return true; 1601 } 1602 1603 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1604 // field is a handle to a java.lang.reflect.Field object 1605 assert(field != NULL, "illegal field"); 1606 JVMWrapper("JVM_GetFieldAnnotations"); 1607 1608 fieldDescriptor fd; 1609 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1610 if (!gotFd) { 1611 return NULL; 1612 } 1613 1614 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1615 JVM_END 1616 1617 1618 static Method* jvm_get_method_common(jobject method) { 1619 // some of this code was adapted from from jni_FromReflectedMethod 1620 1621 oop reflected = JNIHandles::resolve_non_null(method); 1622 oop mirror = NULL; 1623 int slot = 0; 1624 1625 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1626 mirror = java_lang_reflect_Constructor::clazz(reflected); 1627 slot = java_lang_reflect_Constructor::slot(reflected); 1628 } else { 1629 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1630 "wrong type"); 1631 mirror = java_lang_reflect_Method::clazz(reflected); 1632 slot = java_lang_reflect_Method::slot(reflected); 1633 } 1634 Klass* k = java_lang_Class::as_Klass(mirror); 1635 1636 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1637 assert(m != NULL, "cannot find method"); 1638 return m; // caller has to deal with NULL in product mode 1639 } 1640 1641 1642 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1643 JVMWrapper("JVM_GetMethodAnnotations"); 1644 1645 // method is a handle to a java.lang.reflect.Method object 1646 Method* m = jvm_get_method_common(method); 1647 if (m == NULL) { 1648 return NULL; 1649 } 1650 1651 return (jbyteArray) JNIHandles::make_local(env, 1652 Annotations::make_java_array(m->annotations(), THREAD)); 1653 JVM_END 1654 1655 1656 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1657 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1658 1659 // method is a handle to a java.lang.reflect.Method object 1660 Method* m = jvm_get_method_common(method); 1661 if (m == NULL) { 1662 return NULL; 1663 } 1664 1665 return (jbyteArray) JNIHandles::make_local(env, 1666 Annotations::make_java_array(m->annotation_default(), THREAD)); 1667 JVM_END 1668 1669 1670 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1671 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1672 1673 // method is a handle to a java.lang.reflect.Method object 1674 Method* m = jvm_get_method_common(method); 1675 if (m == NULL) { 1676 return NULL; 1677 } 1678 1679 return (jbyteArray) JNIHandles::make_local(env, 1680 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1681 JVM_END 1682 1683 /* Type use annotations support (JDK 1.8) */ 1684 1685 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1686 assert (cls != NULL, "illegal class"); 1687 JVMWrapper("JVM_GetClassTypeAnnotations"); 1688 ResourceMark rm(THREAD); 1689 // Return null for arrays and primitives 1690 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1691 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1692 if (k->oop_is_instance()) { 1693 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1694 if (type_annotations != NULL) { 1695 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1696 return (jbyteArray) JNIHandles::make_local(env, a); 1697 } 1698 } 1699 } 1700 return NULL; 1701 JVM_END 1702 1703 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1704 assert (method != NULL, "illegal method"); 1705 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1706 1707 // method is a handle to a java.lang.reflect.Method object 1708 Method* m = jvm_get_method_common(method); 1709 if (m == NULL) { 1710 return NULL; 1711 } 1712 1713 AnnotationArray* type_annotations = m->type_annotations(); 1714 if (type_annotations != NULL) { 1715 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1716 return (jbyteArray) JNIHandles::make_local(env, a); 1717 } 1718 1719 return NULL; 1720 JVM_END 1721 1722 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1723 assert (field != NULL, "illegal field"); 1724 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1725 1726 fieldDescriptor fd; 1727 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1728 if (!gotFd) { 1729 return NULL; 1730 } 1731 1732 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1733 JVM_END 1734 1735 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1736 if (!cp->is_within_bounds(index)) { 1737 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1738 } 1739 } 1740 1741 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1742 { 1743 JVMWrapper("JVM_GetMethodParameters"); 1744 // method is a handle to a java.lang.reflect.Method object 1745 Method* method_ptr = jvm_get_method_common(method); 1746 methodHandle mh (THREAD, method_ptr); 1747 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1748 const int num_params = mh->method_parameters_length(); 1749 1750 if (0 != num_params) { 1751 // make sure all the symbols are properly formatted 1752 for (int i = 0; i < num_params; i++) { 1753 MethodParametersElement* params = mh->method_parameters_start(); 1754 int index = params[i].name_cp_index; 1755 bounds_check(mh->constants(), index, CHECK_NULL); 1756 1757 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1758 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1759 "Wrong type at constant pool index"); 1760 } 1761 1762 } 1763 1764 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1765 objArrayHandle result (THREAD, result_oop); 1766 1767 for (int i = 0; i < num_params; i++) { 1768 MethodParametersElement* params = mh->method_parameters_start(); 1769 // For a 0 index, give a NULL symbol 1770 Symbol* sym = 0 != params[i].name_cp_index ? 1771 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1772 int flags = params[i].flags; 1773 oop param = Reflection::new_parameter(reflected_method, i, sym, 1774 flags, CHECK_NULL); 1775 result->obj_at_put(i, param); 1776 } 1777 return (jobjectArray)JNIHandles::make_local(env, result()); 1778 } else { 1779 return (jobjectArray)NULL; 1780 } 1781 } 1782 JVM_END 1783 1784 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1785 1786 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1787 { 1788 JVMWrapper("JVM_GetClassDeclaredFields"); 1789 JvmtiVMObjectAllocEventCollector oam; 1790 1791 // Exclude primitive types and array types 1792 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1793 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1794 // Return empty array 1795 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1796 return (jobjectArray) JNIHandles::make_local(env, res); 1797 } 1798 1799 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1800 constantPoolHandle cp(THREAD, k->constants()); 1801 1802 // Ensure class is linked 1803 k->link_class(CHECK_NULL); 1804 1805 // 4496456 We need to filter out java.lang.Throwable.backtrace 1806 bool skip_backtrace = false; 1807 1808 // Allocate result 1809 int num_fields; 1810 1811 if (publicOnly) { 1812 num_fields = 0; 1813 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1814 if (fs.access_flags().is_public()) ++num_fields; 1815 } 1816 } else { 1817 num_fields = k->java_fields_count(); 1818 1819 if (k() == SystemDictionary::Throwable_klass()) { 1820 num_fields--; 1821 skip_backtrace = true; 1822 } 1823 } 1824 1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1826 objArrayHandle result (THREAD, r); 1827 1828 int out_idx = 0; 1829 fieldDescriptor fd; 1830 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1831 if (skip_backtrace) { 1832 // 4496456 skip java.lang.Throwable.backtrace 1833 int offset = fs.offset(); 1834 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1835 } 1836 1837 if (!publicOnly || fs.access_flags().is_public()) { 1838 fd.reinitialize(k(), fs.index()); 1839 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1840 result->obj_at_put(out_idx, field); 1841 ++out_idx; 1842 } 1843 } 1844 assert(out_idx == num_fields, "just checking"); 1845 return (jobjectArray) JNIHandles::make_local(env, result()); 1846 } 1847 JVM_END 1848 1849 static bool select_method(methodHandle method, bool want_constructor) { 1850 if (want_constructor) { 1851 return (method->is_initializer() && !method->is_static()); 1852 } else { 1853 return (!method->is_initializer() && !method->is_overpass()); 1854 } 1855 } 1856 1857 static jobjectArray get_class_declared_methods_helper( 1858 JNIEnv *env, 1859 jclass ofClass, jboolean publicOnly, 1860 bool want_constructor, 1861 Klass* klass, TRAPS) { 1862 1863 JvmtiVMObjectAllocEventCollector oam; 1864 1865 // Exclude primitive types and array types 1866 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1867 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1868 // Return empty array 1869 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1870 return (jobjectArray) JNIHandles::make_local(env, res); 1871 } 1872 1873 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1874 1875 // Ensure class is linked 1876 k->link_class(CHECK_NULL); 1877 1878 Array<Method*>* methods = k->methods(); 1879 int methods_length = methods->length(); 1880 1881 // Save original method_idnum in case of redefinition, which can change 1882 // the idnum of obsolete methods. The new method will have the same idnum 1883 // but if we refresh the methods array, the counts will be wrong. 1884 ResourceMark rm(THREAD); 1885 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1886 int num_methods = 0; 1887 1888 for (int i = 0; i < methods_length; i++) { 1889 methodHandle method(THREAD, methods->at(i)); 1890 if (select_method(method, want_constructor)) { 1891 if (!publicOnly || method->is_public()) { 1892 idnums->push(method->method_idnum()); 1893 ++num_methods; 1894 } 1895 } 1896 } 1897 1898 // Allocate result 1899 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1900 objArrayHandle result (THREAD, r); 1901 1902 // Now just put the methods that we selected above, but go by their idnum 1903 // in case of redefinition. The methods can be redefined at any safepoint, 1904 // so above when allocating the oop array and below when creating reflect 1905 // objects. 1906 for (int i = 0; i < num_methods; i++) { 1907 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1908 if (method.is_null()) { 1909 // Method may have been deleted and seems this API can handle null 1910 // Otherwise should probably put a method that throws NSME 1911 result->obj_at_put(i, NULL); 1912 } else { 1913 oop m; 1914 if (want_constructor) { 1915 m = Reflection::new_constructor(method, CHECK_NULL); 1916 } else { 1917 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1918 } 1919 result->obj_at_put(i, m); 1920 } 1921 } 1922 1923 return (jobjectArray) JNIHandles::make_local(env, result()); 1924 } 1925 1926 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1927 { 1928 JVMWrapper("JVM_GetClassDeclaredMethods"); 1929 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1930 /*want_constructor*/ false, 1931 SystemDictionary::reflect_Method_klass(), THREAD); 1932 } 1933 JVM_END 1934 1935 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1936 { 1937 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1938 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1939 /*want_constructor*/ true, 1940 SystemDictionary::reflect_Constructor_klass(), THREAD); 1941 } 1942 JVM_END 1943 1944 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1945 { 1946 JVMWrapper("JVM_GetClassAccessFlags"); 1947 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1948 // Primitive type 1949 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1950 } 1951 1952 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1953 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1954 } 1955 JVM_END 1956 1957 1958 // Constant pool access ////////////////////////////////////////////////////////// 1959 1960 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1961 { 1962 JVMWrapper("JVM_GetClassConstantPool"); 1963 JvmtiVMObjectAllocEventCollector oam; 1964 1965 // Return null for primitives and arrays 1966 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1967 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1968 if (k->oop_is_instance()) { 1969 instanceKlassHandle k_h(THREAD, k); 1970 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1971 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1972 return JNIHandles::make_local(jcp()); 1973 } 1974 } 1975 return NULL; 1976 } 1977 JVM_END 1978 1979 1980 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1981 { 1982 JVMWrapper("JVM_ConstantPoolGetSize"); 1983 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1984 return cp->length(); 1985 } 1986 JVM_END 1987 1988 1989 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1990 { 1991 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1992 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1993 bounds_check(cp, index, CHECK_NULL); 1994 constantTag tag = cp->tag_at(index); 1995 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1996 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1997 } 1998 Klass* k = cp->klass_at(index, CHECK_NULL); 1999 return (jclass) JNIHandles::make_local(k->java_mirror()); 2000 } 2001 JVM_END 2002 2003 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2004 { 2005 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 2006 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2007 bounds_check(cp, index, CHECK_NULL); 2008 constantTag tag = cp->tag_at(index); 2009 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2010 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2011 } 2012 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2013 if (k == NULL) return NULL; 2014 return (jclass) JNIHandles::make_local(k->java_mirror()); 2015 } 2016 JVM_END 2017 2018 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2019 constantTag tag = cp->tag_at(index); 2020 if (!tag.is_method() && !tag.is_interface_method()) { 2021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2022 } 2023 int klass_ref = cp->uncached_klass_ref_index_at(index); 2024 Klass* k_o; 2025 if (force_resolution) { 2026 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2027 } else { 2028 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2029 if (k_o == NULL) return NULL; 2030 } 2031 instanceKlassHandle k(THREAD, k_o); 2032 Symbol* name = cp->uncached_name_ref_at(index); 2033 Symbol* sig = cp->uncached_signature_ref_at(index); 2034 methodHandle m (THREAD, k->find_method(name, sig)); 2035 if (m.is_null()) { 2036 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2037 } 2038 oop method; 2039 if (!m->is_initializer() || m->is_static()) { 2040 method = Reflection::new_method(m, true, true, CHECK_NULL); 2041 } else { 2042 method = Reflection::new_constructor(m, CHECK_NULL); 2043 } 2044 return JNIHandles::make_local(method); 2045 } 2046 2047 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2048 { 2049 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2050 JvmtiVMObjectAllocEventCollector oam; 2051 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2052 bounds_check(cp, index, CHECK_NULL); 2053 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2054 return res; 2055 } 2056 JVM_END 2057 2058 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2059 { 2060 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2061 JvmtiVMObjectAllocEventCollector oam; 2062 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2063 bounds_check(cp, index, CHECK_NULL); 2064 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2065 return res; 2066 } 2067 JVM_END 2068 2069 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2070 constantTag tag = cp->tag_at(index); 2071 if (!tag.is_field()) { 2072 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2073 } 2074 int klass_ref = cp->uncached_klass_ref_index_at(index); 2075 Klass* k_o; 2076 if (force_resolution) { 2077 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2078 } else { 2079 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2080 if (k_o == NULL) return NULL; 2081 } 2082 instanceKlassHandle k(THREAD, k_o); 2083 Symbol* name = cp->uncached_name_ref_at(index); 2084 Symbol* sig = cp->uncached_signature_ref_at(index); 2085 fieldDescriptor fd; 2086 Klass* target_klass = k->find_field(name, sig, &fd); 2087 if (target_klass == NULL) { 2088 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2089 } 2090 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2091 return JNIHandles::make_local(field); 2092 } 2093 2094 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2095 { 2096 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2097 JvmtiVMObjectAllocEventCollector oam; 2098 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2099 bounds_check(cp, index, CHECK_NULL); 2100 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2101 return res; 2102 } 2103 JVM_END 2104 2105 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2106 { 2107 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2108 JvmtiVMObjectAllocEventCollector oam; 2109 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2110 bounds_check(cp, index, CHECK_NULL); 2111 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2112 return res; 2113 } 2114 JVM_END 2115 2116 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2117 { 2118 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2119 JvmtiVMObjectAllocEventCollector oam; 2120 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2121 bounds_check(cp, index, CHECK_NULL); 2122 constantTag tag = cp->tag_at(index); 2123 if (!tag.is_field_or_method()) { 2124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2125 } 2126 int klass_ref = cp->uncached_klass_ref_index_at(index); 2127 Symbol* klass_name = cp->klass_name_at(klass_ref); 2128 Symbol* member_name = cp->uncached_name_ref_at(index); 2129 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2130 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2131 objArrayHandle dest(THREAD, dest_o); 2132 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2133 dest->obj_at_put(0, str()); 2134 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2135 dest->obj_at_put(1, str()); 2136 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2137 dest->obj_at_put(2, str()); 2138 return (jobjectArray) JNIHandles::make_local(dest()); 2139 } 2140 JVM_END 2141 2142 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2143 { 2144 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2145 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2146 bounds_check(cp, index, CHECK_0); 2147 constantTag tag = cp->tag_at(index); 2148 if (!tag.is_int()) { 2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2150 } 2151 return cp->int_at(index); 2152 } 2153 JVM_END 2154 2155 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2156 { 2157 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2158 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2159 bounds_check(cp, index, CHECK_(0L)); 2160 constantTag tag = cp->tag_at(index); 2161 if (!tag.is_long()) { 2162 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2163 } 2164 return cp->long_at(index); 2165 } 2166 JVM_END 2167 2168 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2169 { 2170 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2171 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2172 bounds_check(cp, index, CHECK_(0.0f)); 2173 constantTag tag = cp->tag_at(index); 2174 if (!tag.is_float()) { 2175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2176 } 2177 return cp->float_at(index); 2178 } 2179 JVM_END 2180 2181 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2182 { 2183 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2184 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2185 bounds_check(cp, index, CHECK_(0.0)); 2186 constantTag tag = cp->tag_at(index); 2187 if (!tag.is_double()) { 2188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2189 } 2190 return cp->double_at(index); 2191 } 2192 JVM_END 2193 2194 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2195 { 2196 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2197 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2198 bounds_check(cp, index, CHECK_NULL); 2199 constantTag tag = cp->tag_at(index); 2200 if (!tag.is_string()) { 2201 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2202 } 2203 oop str = cp->string_at(index, CHECK_NULL); 2204 return (jstring) JNIHandles::make_local(str); 2205 } 2206 JVM_END 2207 2208 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2209 { 2210 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2211 JvmtiVMObjectAllocEventCollector oam; 2212 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2213 bounds_check(cp, index, CHECK_NULL); 2214 constantTag tag = cp->tag_at(index); 2215 if (!tag.is_symbol()) { 2216 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2217 } 2218 Symbol* sym = cp->symbol_at(index); 2219 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2220 return (jstring) JNIHandles::make_local(str()); 2221 } 2222 JVM_END 2223 2224 2225 // Assertion support. ////////////////////////////////////////////////////////// 2226 2227 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2228 JVMWrapper("JVM_DesiredAssertionStatus"); 2229 assert(cls != NULL, "bad class"); 2230 2231 oop r = JNIHandles::resolve(cls); 2232 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2233 if (java_lang_Class::is_primitive(r)) return false; 2234 2235 Klass* k = java_lang_Class::as_Klass(r); 2236 assert(k->oop_is_instance(), "must be an instance klass"); 2237 if (! k->oop_is_instance()) return false; 2238 2239 ResourceMark rm(THREAD); 2240 const char* name = k->name()->as_C_string(); 2241 bool system_class = k->class_loader() == NULL; 2242 return JavaAssertions::enabled(name, system_class); 2243 2244 JVM_END 2245 2246 2247 // Return a new AssertionStatusDirectives object with the fields filled in with 2248 // command-line assertion arguments (i.e., -ea, -da). 2249 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2250 JVMWrapper("JVM_AssertionStatusDirectives"); 2251 JvmtiVMObjectAllocEventCollector oam; 2252 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2253 return JNIHandles::make_local(env, asd); 2254 JVM_END 2255 2256 // Verification //////////////////////////////////////////////////////////////////////////////// 2257 2258 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2259 2260 // RedefineClasses support: bug 6214132 caused verification to fail. 2261 // All functions from this section should call the jvmtiThreadSate function: 2262 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2263 // The function returns a Klass* of the _scratch_class if the verifier 2264 // was invoked in the middle of the class redefinition. 2265 // Otherwise it returns its argument value which is the _the_class Klass*. 2266 // Please, refer to the description in the jvmtiThreadSate.hpp. 2267 2268 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2269 JVMWrapper("JVM_GetClassNameUTF"); 2270 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2272 return k->name()->as_utf8(); 2273 JVM_END 2274 2275 2276 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2277 JVMWrapper("JVM_GetClassCPTypes"); 2278 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2279 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2280 // types will have length zero if this is not an InstanceKlass 2281 // (length is determined by call to JVM_GetClassCPEntriesCount) 2282 if (k->oop_is_instance()) { 2283 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2284 for (int index = cp->length() - 1; index >= 0; index--) { 2285 constantTag tag = cp->tag_at(index); 2286 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2287 } 2288 } 2289 JVM_END 2290 2291 2292 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2293 JVMWrapper("JVM_GetClassCPEntriesCount"); 2294 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2296 if (!k->oop_is_instance()) 2297 return 0; 2298 return InstanceKlass::cast(k)->constants()->length(); 2299 JVM_END 2300 2301 2302 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2303 JVMWrapper("JVM_GetClassFieldsCount"); 2304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2305 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2306 if (!k->oop_is_instance()) 2307 return 0; 2308 return InstanceKlass::cast(k)->java_fields_count(); 2309 JVM_END 2310 2311 2312 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2313 JVMWrapper("JVM_GetClassMethodsCount"); 2314 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2316 if (!k->oop_is_instance()) 2317 return 0; 2318 return InstanceKlass::cast(k)->methods()->length(); 2319 JVM_END 2320 2321 2322 // The following methods, used for the verifier, are never called with 2323 // array klasses, so a direct cast to InstanceKlass is safe. 2324 // Typically, these methods are called in a loop with bounds determined 2325 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2326 // zero for arrays. 2327 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2328 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2331 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2332 int length = method->checked_exceptions_length(); 2333 if (length > 0) { 2334 CheckedExceptionElement* table= method->checked_exceptions_start(); 2335 for (int i = 0; i < length; i++) { 2336 exceptions[i] = table[i].class_cp_index; 2337 } 2338 } 2339 JVM_END 2340 2341 2342 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2343 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2344 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2345 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2346 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2347 return method->checked_exceptions_length(); 2348 JVM_END 2349 2350 2351 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2352 JVMWrapper("JVM_GetMethodIxByteCode"); 2353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2354 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2355 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2356 memcpy(code, method->code_base(), method->code_size()); 2357 JVM_END 2358 2359 2360 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2361 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2365 return method->code_size(); 2366 JVM_END 2367 2368 2369 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2370 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2374 ExceptionTable extable(method); 2375 entry->start_pc = extable.start_pc(entry_index); 2376 entry->end_pc = extable.end_pc(entry_index); 2377 entry->handler_pc = extable.handler_pc(entry_index); 2378 entry->catchType = extable.catch_type_index(entry_index); 2379 JVM_END 2380 2381 2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2383 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2386 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2387 return method->exception_table_length(); 2388 JVM_END 2389 2390 2391 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2392 JVMWrapper("JVM_GetMethodIxModifiers"); 2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2395 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2396 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2397 JVM_END 2398 2399 2400 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2401 JVMWrapper("JVM_GetFieldIxModifiers"); 2402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2404 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2405 JVM_END 2406 2407 2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2409 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2410 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2412 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2413 return method->max_locals(); 2414 JVM_END 2415 2416 2417 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2418 JVMWrapper("JVM_GetMethodIxArgsSize"); 2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2422 return method->size_of_parameters(); 2423 JVM_END 2424 2425 2426 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2427 JVMWrapper("JVM_GetMethodIxMaxStack"); 2428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2429 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2430 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2431 return method->verifier_max_stack(); 2432 JVM_END 2433 2434 2435 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2436 JVMWrapper("JVM_IsConstructorIx"); 2437 ResourceMark rm(THREAD); 2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2440 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2441 return method->name() == vmSymbols::object_initializer_name(); 2442 JVM_END 2443 2444 2445 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2446 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2447 ResourceMark rm(THREAD); 2448 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2449 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2450 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2451 return method->is_overpass(); 2452 JVM_END 2453 2454 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2455 JVMWrapper("JVM_GetMethodIxIxUTF"); 2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2459 return method->name()->as_utf8(); 2460 JVM_END 2461 2462 2463 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2464 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2468 return method->signature()->as_utf8(); 2469 JVM_END 2470 2471 /** 2472 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2473 * read entries in the constant pool. Since the old verifier always 2474 * works on a copy of the code, it will not see any rewriting that 2475 * may possibly occur in the middle of verification. So it is important 2476 * that nothing it calls tries to use the cpCache instead of the raw 2477 * constant pool, so we must use cp->uncached_x methods when appropriate. 2478 */ 2479 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2480 JVMWrapper("JVM_GetCPFieldNameUTF"); 2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2483 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2484 switch (cp->tag_at(cp_index).value()) { 2485 case JVM_CONSTANT_Fieldref: 2486 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2487 default: 2488 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2489 } 2490 ShouldNotReachHere(); 2491 return NULL; 2492 JVM_END 2493 2494 2495 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2496 JVMWrapper("JVM_GetCPMethodNameUTF"); 2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2499 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2500 switch (cp->tag_at(cp_index).value()) { 2501 case JVM_CONSTANT_InterfaceMethodref: 2502 case JVM_CONSTANT_Methodref: 2503 case JVM_CONSTANT_NameAndType: // for invokedynamic 2504 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2505 default: 2506 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2507 } 2508 ShouldNotReachHere(); 2509 return NULL; 2510 JVM_END 2511 2512 2513 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2514 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2517 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2518 switch (cp->tag_at(cp_index).value()) { 2519 case JVM_CONSTANT_InterfaceMethodref: 2520 case JVM_CONSTANT_Methodref: 2521 case JVM_CONSTANT_NameAndType: // for invokedynamic 2522 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2523 default: 2524 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2525 } 2526 ShouldNotReachHere(); 2527 return NULL; 2528 JVM_END 2529 2530 2531 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2532 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2533 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2534 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2535 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2536 switch (cp->tag_at(cp_index).value()) { 2537 case JVM_CONSTANT_Fieldref: 2538 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2539 default: 2540 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2541 } 2542 ShouldNotReachHere(); 2543 return NULL; 2544 JVM_END 2545 2546 2547 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2548 JVMWrapper("JVM_GetCPClassNameUTF"); 2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2551 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2552 Symbol* classname = cp->klass_name_at(cp_index); 2553 return classname->as_utf8(); 2554 JVM_END 2555 2556 2557 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2558 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2559 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2560 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2561 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2562 switch (cp->tag_at(cp_index).value()) { 2563 case JVM_CONSTANT_Fieldref: { 2564 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2565 Symbol* classname = cp->klass_name_at(class_index); 2566 return classname->as_utf8(); 2567 } 2568 default: 2569 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2570 } 2571 ShouldNotReachHere(); 2572 return NULL; 2573 JVM_END 2574 2575 2576 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2577 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2580 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2581 switch (cp->tag_at(cp_index).value()) { 2582 case JVM_CONSTANT_Methodref: 2583 case JVM_CONSTANT_InterfaceMethodref: { 2584 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2585 Symbol* classname = cp->klass_name_at(class_index); 2586 return classname->as_utf8(); 2587 } 2588 default: 2589 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2590 } 2591 ShouldNotReachHere(); 2592 return NULL; 2593 JVM_END 2594 2595 2596 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2597 JVMWrapper("JVM_GetCPFieldModifiers"); 2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2599 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2600 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2601 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2602 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2603 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2604 switch (cp->tag_at(cp_index).value()) { 2605 case JVM_CONSTANT_Fieldref: { 2606 Symbol* name = cp->uncached_name_ref_at(cp_index); 2607 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2608 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2609 if (fs.name() == name && fs.signature() == signature) { 2610 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2611 } 2612 } 2613 return -1; 2614 } 2615 default: 2616 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2617 } 2618 ShouldNotReachHere(); 2619 return 0; 2620 JVM_END 2621 2622 2623 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2624 JVMWrapper("JVM_GetCPMethodModifiers"); 2625 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2626 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2627 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2628 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2629 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2630 switch (cp->tag_at(cp_index).value()) { 2631 case JVM_CONSTANT_Methodref: 2632 case JVM_CONSTANT_InterfaceMethodref: { 2633 Symbol* name = cp->uncached_name_ref_at(cp_index); 2634 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2635 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2636 int methods_count = methods->length(); 2637 for (int i = 0; i < methods_count; i++) { 2638 Method* method = methods->at(i); 2639 if (method->name() == name && method->signature() == signature) { 2640 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2641 } 2642 } 2643 return -1; 2644 } 2645 default: 2646 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2647 } 2648 ShouldNotReachHere(); 2649 return 0; 2650 JVM_END 2651 2652 2653 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2654 2655 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2656 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2657 JVM_END 2658 2659 2660 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2661 JVMWrapper("JVM_IsSameClassPackage"); 2662 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2663 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2664 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2665 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2666 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2667 JVM_END 2668 2669 2670 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2671 2672 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2673 JVMWrapper2("JVM_Open (%s)", fname); 2674 2675 //%note jvm_r6 2676 int result = os::open(fname, flags, mode); 2677 if (result >= 0) { 2678 return result; 2679 } else { 2680 switch(errno) { 2681 case EEXIST: 2682 return JVM_EEXIST; 2683 default: 2684 return -1; 2685 } 2686 } 2687 JVM_END 2688 2689 2690 JVM_LEAF(jint, JVM_Close(jint fd)) 2691 JVMWrapper2("JVM_Close (0x%x)", fd); 2692 //%note jvm_r6 2693 return os::close(fd); 2694 JVM_END 2695 2696 2697 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2698 JVMWrapper2("JVM_Read (0x%x)", fd); 2699 2700 //%note jvm_r6 2701 return (jint)os::restartable_read(fd, buf, nbytes); 2702 JVM_END 2703 2704 2705 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2706 JVMWrapper2("JVM_Write (0x%x)", fd); 2707 2708 //%note jvm_r6 2709 return (jint)os::write(fd, buf, nbytes); 2710 JVM_END 2711 2712 2713 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2714 JVMWrapper2("JVM_Available (0x%x)", fd); 2715 //%note jvm_r6 2716 return os::available(fd, pbytes); 2717 JVM_END 2718 2719 2720 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2721 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2722 //%note jvm_r6 2723 return os::lseek(fd, offset, whence); 2724 JVM_END 2725 2726 2727 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2728 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2729 return os::ftruncate(fd, length); 2730 JVM_END 2731 2732 2733 JVM_LEAF(jint, JVM_Sync(jint fd)) 2734 JVMWrapper2("JVM_Sync (0x%x)", fd); 2735 //%note jvm_r6 2736 return os::fsync(fd); 2737 JVM_END 2738 2739 2740 // Printing support ////////////////////////////////////////////////// 2741 extern "C" { 2742 2743 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2744 // see bug 4399518, 4417214 2745 if ((intptr_t)count <= 0) return -1; 2746 return vsnprintf(str, count, fmt, args); 2747 } 2748 2749 2750 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2751 va_list args; 2752 int len; 2753 va_start(args, fmt); 2754 len = jio_vsnprintf(str, count, fmt, args); 2755 va_end(args); 2756 return len; 2757 } 2758 2759 2760 int jio_fprintf(FILE* f, const char *fmt, ...) { 2761 int len; 2762 va_list args; 2763 va_start(args, fmt); 2764 len = jio_vfprintf(f, fmt, args); 2765 va_end(args); 2766 return len; 2767 } 2768 2769 2770 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2771 if (Arguments::vfprintf_hook() != NULL) { 2772 return Arguments::vfprintf_hook()(f, fmt, args); 2773 } else { 2774 return vfprintf(f, fmt, args); 2775 } 2776 } 2777 2778 2779 JNIEXPORT int jio_printf(const char *fmt, ...) { 2780 int len; 2781 va_list args; 2782 va_start(args, fmt); 2783 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2784 va_end(args); 2785 return len; 2786 } 2787 2788 2789 // HotSpot specific jio method 2790 void jio_print(const char* s) { 2791 // Try to make this function as atomic as possible. 2792 if (Arguments::vfprintf_hook() != NULL) { 2793 jio_fprintf(defaultStream::output_stream(), "%s", s); 2794 } else { 2795 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2796 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2797 } 2798 } 2799 2800 } // Extern C 2801 2802 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2803 2804 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2805 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2806 // OSThread objects. The exception to this rule is when the target object is the thread 2807 // doing the operation, in which case we know that the thread won't exit until the 2808 // operation is done (all exits being voluntary). There are a few cases where it is 2809 // rather silly to do operations on yourself, like resuming yourself or asking whether 2810 // you are alive. While these can still happen, they are not subject to deadlocks if 2811 // the lock is held while the operation occurs (this is not the case for suspend, for 2812 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2813 // implementation is local to this file, we always lock Threads_lock for that one. 2814 2815 static void thread_entry(JavaThread* thread, TRAPS) { 2816 HandleMark hm(THREAD); 2817 Handle obj(THREAD, thread->threadObj()); 2818 JavaValue result(T_VOID); 2819 JavaCalls::call_virtual(&result, 2820 obj, 2821 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2822 vmSymbols::run_method_name(), 2823 vmSymbols::void_method_signature(), 2824 THREAD); 2825 } 2826 2827 2828 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2829 JVMWrapper("JVM_StartThread"); 2830 JavaThread *native_thread = NULL; 2831 2832 // We cannot hold the Threads_lock when we throw an exception, 2833 // due to rank ordering issues. Example: we might need to grab the 2834 // Heap_lock while we construct the exception. 2835 bool throw_illegal_thread_state = false; 2836 2837 // We must release the Threads_lock before we can post a jvmti event 2838 // in Thread::start. 2839 { 2840 // Ensure that the C++ Thread and OSThread structures aren't freed before 2841 // we operate. 2842 MutexLocker mu(Threads_lock); 2843 2844 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2845 // re-starting an already started thread, so we should usually find 2846 // that the JavaThread is null. However for a JNI attached thread 2847 // there is a small window between the Thread object being created 2848 // (with its JavaThread set) and the update to its threadStatus, so we 2849 // have to check for this 2850 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2851 throw_illegal_thread_state = true; 2852 } else { 2853 // We could also check the stillborn flag to see if this thread was already stopped, but 2854 // for historical reasons we let the thread detect that itself when it starts running 2855 2856 jlong size = 2857 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2858 // Allocate the C++ Thread structure and create the native thread. The 2859 // stack size retrieved from java is signed, but the constructor takes 2860 // size_t (an unsigned type), so avoid passing negative values which would 2861 // result in really large stacks. 2862 size_t sz = size > 0 ? (size_t) size : 0; 2863 native_thread = new JavaThread(&thread_entry, sz); 2864 2865 // At this point it may be possible that no osthread was created for the 2866 // JavaThread due to lack of memory. Check for this situation and throw 2867 // an exception if necessary. Eventually we may want to change this so 2868 // that we only grab the lock if the thread was created successfully - 2869 // then we can also do this check and throw the exception in the 2870 // JavaThread constructor. 2871 if (native_thread->osthread() != NULL) { 2872 // Note: the current thread is not being used within "prepare". 2873 native_thread->prepare(jthread); 2874 } 2875 } 2876 } 2877 2878 if (throw_illegal_thread_state) { 2879 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2880 } 2881 2882 assert(native_thread != NULL, "Starting null thread?"); 2883 2884 if (native_thread->osthread() == NULL) { 2885 // No one should hold a reference to the 'native_thread'. 2886 delete native_thread; 2887 if (JvmtiExport::should_post_resource_exhausted()) { 2888 JvmtiExport::post_resource_exhausted( 2889 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2890 os::native_thread_creation_failed_msg()); 2891 } 2892 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2893 os::native_thread_creation_failed_msg()); 2894 } 2895 2896 Thread::start(native_thread); 2897 2898 JVM_END 2899 2900 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2901 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2902 // but is thought to be reliable and simple. In the case, where the receiver is the 2903 // same thread as the sender, no safepoint is needed. 2904 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2905 JVMWrapper("JVM_StopThread"); 2906 2907 oop java_throwable = JNIHandles::resolve(throwable); 2908 if (java_throwable == NULL) { 2909 THROW(vmSymbols::java_lang_NullPointerException()); 2910 } 2911 oop java_thread = JNIHandles::resolve_non_null(jthread); 2912 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2913 Events::log_exception(JavaThread::current(), 2914 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2915 receiver, (address)java_thread, throwable); 2916 // First check if thread is alive 2917 if (receiver != NULL) { 2918 // Check if exception is getting thrown at self (use oop equality, since the 2919 // target object might exit) 2920 if (java_thread == thread->threadObj()) { 2921 THROW_OOP(java_throwable); 2922 } else { 2923 // Enques a VM_Operation to stop all threads and then deliver the exception... 2924 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2925 } 2926 } 2927 else { 2928 // Either: 2929 // - target thread has not been started before being stopped, or 2930 // - target thread already terminated 2931 // We could read the threadStatus to determine which case it is 2932 // but that is overkill as it doesn't matter. We must set the 2933 // stillborn flag for the first case, and if the thread has already 2934 // exited setting this flag has no affect 2935 java_lang_Thread::set_stillborn(java_thread); 2936 } 2937 JVM_END 2938 2939 2940 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2941 JVMWrapper("JVM_IsThreadAlive"); 2942 2943 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2944 return java_lang_Thread::is_alive(thread_oop); 2945 JVM_END 2946 2947 2948 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2949 JVMWrapper("JVM_SuspendThread"); 2950 oop java_thread = JNIHandles::resolve_non_null(jthread); 2951 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2952 2953 if (receiver != NULL) { 2954 // thread has run and has not exited (still on threads list) 2955 2956 { 2957 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2958 if (receiver->is_external_suspend()) { 2959 // Don't allow nested external suspend requests. We can't return 2960 // an error from this interface so just ignore the problem. 2961 return; 2962 } 2963 if (receiver->is_exiting()) { // thread is in the process of exiting 2964 return; 2965 } 2966 receiver->set_external_suspend(); 2967 } 2968 2969 // java_suspend() will catch threads in the process of exiting 2970 // and will ignore them. 2971 receiver->java_suspend(); 2972 2973 // It would be nice to have the following assertion in all the 2974 // time, but it is possible for a racing resume request to have 2975 // resumed this thread right after we suspended it. Temporarily 2976 // enable this assertion if you are chasing a different kind of 2977 // bug. 2978 // 2979 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2980 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2981 } 2982 JVM_END 2983 2984 2985 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2986 JVMWrapper("JVM_ResumeThread"); 2987 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2988 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2989 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2990 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2991 // looks at it. 2992 MutexLocker ml(Threads_lock); 2993 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2994 if (thr != NULL) { 2995 // the thread has run and is not in the process of exiting 2996 thr->java_resume(); 2997 } 2998 JVM_END 2999 3000 3001 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 3002 JVMWrapper("JVM_SetThreadPriority"); 3003 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3004 MutexLocker ml(Threads_lock); 3005 oop java_thread = JNIHandles::resolve_non_null(jthread); 3006 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 3007 JavaThread* thr = java_lang_Thread::thread(java_thread); 3008 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 3009 Thread::set_priority(thr, (ThreadPriority)prio); 3010 } 3011 JVM_END 3012 3013 3014 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 3015 JVMWrapper("JVM_Yield"); 3016 if (os::dont_yield()) return; 3017 HOTSPOT_THREAD_YIELD(); 3018 3019 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3020 // Critical for similar threading behaviour 3021 if (ConvertYieldToSleep) { 3022 os::sleep(thread, MinSleepInterval, false); 3023 } else { 3024 os::yield(); 3025 } 3026 JVM_END 3027 3028 3029 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3030 JVMWrapper("JVM_Sleep"); 3031 3032 if (millis < 0) { 3033 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3034 } 3035 3036 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3037 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3038 } 3039 3040 // Save current thread state and restore it at the end of this block. 3041 // And set new thread state to SLEEPING. 3042 JavaThreadSleepState jtss(thread); 3043 3044 HOTSPOT_THREAD_SLEEP_BEGIN(millis); 3045 3046 EventThreadSleep event; 3047 3048 if (millis == 0) { 3049 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3050 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3051 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3052 // for SOLARIS 3053 if (ConvertSleepToYield) { 3054 os::yield(); 3055 } else { 3056 ThreadState old_state = thread->osthread()->get_state(); 3057 thread->osthread()->set_state(SLEEPING); 3058 os::sleep(thread, MinSleepInterval, false); 3059 thread->osthread()->set_state(old_state); 3060 } 3061 } else { 3062 ThreadState old_state = thread->osthread()->get_state(); 3063 thread->osthread()->set_state(SLEEPING); 3064 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3065 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3066 // us while we were sleeping. We do not overwrite those. 3067 if (!HAS_PENDING_EXCEPTION) { 3068 if (event.should_commit()) { 3069 event.set_time(millis); 3070 event.commit(); 3071 } 3072 HOTSPOT_THREAD_SLEEP_END(1); 3073 3074 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3075 // to properly restore the thread state. That's likely wrong. 3076 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3077 } 3078 } 3079 thread->osthread()->set_state(old_state); 3080 } 3081 if (event.should_commit()) { 3082 event.set_time(millis); 3083 event.commit(); 3084 } 3085 HOTSPOT_THREAD_SLEEP_END(0); 3086 JVM_END 3087 3088 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3089 JVMWrapper("JVM_CurrentThread"); 3090 oop jthread = thread->threadObj(); 3091 assert (thread != NULL, "no current thread!"); 3092 return JNIHandles::make_local(env, jthread); 3093 JVM_END 3094 3095 3096 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3097 JVMWrapper("JVM_CountStackFrames"); 3098 3099 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3100 oop java_thread = JNIHandles::resolve_non_null(jthread); 3101 bool throw_illegal_thread_state = false; 3102 int count = 0; 3103 3104 { 3105 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3106 // We need to re-resolve the java_thread, since a GC might have happened during the 3107 // acquire of the lock 3108 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3109 3110 if (thr == NULL) { 3111 // do nothing 3112 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3113 // Check whether this java thread has been suspended already. If not, throws 3114 // IllegalThreadStateException. We defer to throw that exception until 3115 // Threads_lock is released since loading exception class has to leave VM. 3116 // The correct way to test a thread is actually suspended is 3117 // wait_for_ext_suspend_completion(), but we can't call that while holding 3118 // the Threads_lock. The above tests are sufficient for our purposes 3119 // provided the walkability of the stack is stable - which it isn't 3120 // 100% but close enough for most practical purposes. 3121 throw_illegal_thread_state = true; 3122 } else { 3123 // Count all java activation, i.e., number of vframes 3124 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3125 // Native frames are not counted 3126 if (!vfst.method()->is_native()) count++; 3127 } 3128 } 3129 } 3130 3131 if (throw_illegal_thread_state) { 3132 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3133 "this thread is not suspended"); 3134 } 3135 return count; 3136 JVM_END 3137 3138 // Consider: A better way to implement JVM_Interrupt() is to acquire 3139 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3140 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3141 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3142 // outside the critical section. Threads_lock is hot so we want to minimize 3143 // the hold-time. A cleaner interface would be to decompose interrupt into 3144 // two steps. The 1st phase, performed under Threads_lock, would return 3145 // a closure that'd be invoked after Threads_lock was dropped. 3146 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3147 // admit spurious wakeups. 3148 3149 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3150 JVMWrapper("JVM_Interrupt"); 3151 3152 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3153 oop java_thread = JNIHandles::resolve_non_null(jthread); 3154 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3155 // We need to re-resolve the java_thread, since a GC might have happened during the 3156 // acquire of the lock 3157 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3158 if (thr != NULL) { 3159 Thread::interrupt(thr); 3160 } 3161 JVM_END 3162 3163 3164 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3165 JVMWrapper("JVM_IsInterrupted"); 3166 3167 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3168 oop java_thread = JNIHandles::resolve_non_null(jthread); 3169 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3170 // We need to re-resolve the java_thread, since a GC might have happened during the 3171 // acquire of the lock 3172 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3173 if (thr == NULL) { 3174 return JNI_FALSE; 3175 } else { 3176 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3177 } 3178 JVM_END 3179 3180 3181 // Return true iff the current thread has locked the object passed in 3182 3183 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3184 JVMWrapper("JVM_HoldsLock"); 3185 assert(THREAD->is_Java_thread(), "sanity check"); 3186 if (obj == NULL) { 3187 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3188 } 3189 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3190 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3191 JVM_END 3192 3193 3194 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3195 JVMWrapper("JVM_DumpAllStacks"); 3196 VM_PrintThreads op; 3197 VMThread::execute(&op); 3198 if (JvmtiExport::should_post_data_dump()) { 3199 JvmtiExport::post_data_dump(); 3200 } 3201 JVM_END 3202 3203 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3204 JVMWrapper("JVM_SetNativeThreadName"); 3205 ResourceMark rm(THREAD); 3206 oop java_thread = JNIHandles::resolve_non_null(jthread); 3207 JavaThread* thr = java_lang_Thread::thread(java_thread); 3208 // Thread naming only supported for the current thread, doesn't work for 3209 // target threads. 3210 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3211 // we don't set the name of an attached thread to avoid stepping 3212 // on other programs 3213 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3214 os::set_native_thread_name(thread_name); 3215 } 3216 JVM_END 3217 3218 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3219 3220 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3221 assert(jthread->is_Java_thread(), "must be a Java thread"); 3222 if (jthread->privileged_stack_top() == NULL) return false; 3223 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3224 oop loader = jthread->privileged_stack_top()->class_loader(); 3225 if (loader == NULL) return true; 3226 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3227 if (trusted) return true; 3228 } 3229 return false; 3230 } 3231 3232 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3233 JVMWrapper("JVM_CurrentLoadedClass"); 3234 ResourceMark rm(THREAD); 3235 3236 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3237 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3238 bool trusted = is_trusted_frame(thread, &vfst); 3239 if (trusted) return NULL; 3240 3241 Method* m = vfst.method(); 3242 if (!m->is_native()) { 3243 InstanceKlass* holder = m->method_holder(); 3244 oop loader = holder->class_loader(); 3245 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3246 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3247 } 3248 } 3249 } 3250 return NULL; 3251 JVM_END 3252 3253 3254 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3255 JVMWrapper("JVM_CurrentClassLoader"); 3256 ResourceMark rm(THREAD); 3257 3258 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3259 3260 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3261 bool trusted = is_trusted_frame(thread, &vfst); 3262 if (trusted) return NULL; 3263 3264 Method* m = vfst.method(); 3265 if (!m->is_native()) { 3266 InstanceKlass* holder = m->method_holder(); 3267 assert(holder->is_klass(), "just checking"); 3268 oop loader = holder->class_loader(); 3269 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3270 return JNIHandles::make_local(env, loader); 3271 } 3272 } 3273 } 3274 return NULL; 3275 JVM_END 3276 3277 3278 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3279 JVMWrapper("JVM_GetClassContext"); 3280 ResourceMark rm(THREAD); 3281 JvmtiVMObjectAllocEventCollector oam; 3282 vframeStream vfst(thread); 3283 3284 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3285 // This must only be called from SecurityManager.getClassContext 3286 Method* m = vfst.method(); 3287 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3288 m->name() == vmSymbols::getClassContext_name() && 3289 m->signature() == vmSymbols::void_class_array_signature())) { 3290 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3291 } 3292 } 3293 3294 // Collect method holders 3295 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3296 for (; !vfst.at_end(); vfst.security_next()) { 3297 Method* m = vfst.method(); 3298 // Native frames are not returned 3299 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3300 Klass* holder = m->method_holder(); 3301 assert(holder->is_klass(), "just checking"); 3302 klass_array->append(holder); 3303 } 3304 } 3305 3306 // Create result array of type [Ljava/lang/Class; 3307 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3308 // Fill in mirrors corresponding to method holders 3309 for (int i = 0; i < klass_array->length(); i++) { 3310 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3311 } 3312 3313 return (jobjectArray) JNIHandles::make_local(env, result); 3314 JVM_END 3315 3316 3317 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3318 JVMWrapper("JVM_ClassDepth"); 3319 ResourceMark rm(THREAD); 3320 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3321 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3322 3323 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3324 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3325 if (class_name_sym == NULL) { 3326 return -1; 3327 } 3328 3329 int depth = 0; 3330 3331 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3332 if (!vfst.method()->is_native()) { 3333 InstanceKlass* holder = vfst.method()->method_holder(); 3334 assert(holder->is_klass(), "just checking"); 3335 if (holder->name() == class_name_sym) { 3336 return depth; 3337 } 3338 depth++; 3339 } 3340 } 3341 return -1; 3342 JVM_END 3343 3344 3345 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3346 JVMWrapper("JVM_ClassLoaderDepth"); 3347 ResourceMark rm(THREAD); 3348 int depth = 0; 3349 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3350 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3351 bool trusted = is_trusted_frame(thread, &vfst); 3352 if (trusted) return -1; 3353 3354 Method* m = vfst.method(); 3355 if (!m->is_native()) { 3356 InstanceKlass* holder = m->method_holder(); 3357 assert(holder->is_klass(), "just checking"); 3358 oop loader = holder->class_loader(); 3359 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3360 return depth; 3361 } 3362 depth++; 3363 } 3364 } 3365 return -1; 3366 JVM_END 3367 3368 3369 // java.lang.Package //////////////////////////////////////////////////////////////// 3370 3371 3372 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3373 JVMWrapper("JVM_GetSystemPackage"); 3374 ResourceMark rm(THREAD); 3375 JvmtiVMObjectAllocEventCollector oam; 3376 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3377 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3378 return (jstring) JNIHandles::make_local(result); 3379 JVM_END 3380 3381 3382 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3383 JVMWrapper("JVM_GetSystemPackages"); 3384 JvmtiVMObjectAllocEventCollector oam; 3385 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3386 return (jobjectArray) JNIHandles::make_local(result); 3387 JVM_END 3388 3389 3390 // ObjectInputStream /////////////////////////////////////////////////////////////// 3391 3392 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3393 if (current_class == NULL) { 3394 return true; 3395 } 3396 if ((current_class == field_class) || access.is_public()) { 3397 return true; 3398 } 3399 3400 if (access.is_protected()) { 3401 // See if current_class is a subclass of field_class 3402 if (current_class->is_subclass_of(field_class)) { 3403 return true; 3404 } 3405 } 3406 3407 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3408 } 3409 3410 3411 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3412 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3413 JVMWrapper("JVM_AllocateNewObject"); 3414 JvmtiVMObjectAllocEventCollector oam; 3415 // Receiver is not used 3416 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3417 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3418 3419 // Cannot instantiate primitive types 3420 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3421 ResourceMark rm(THREAD); 3422 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3423 } 3424 3425 // Arrays not allowed here, must use JVM_AllocateNewArray 3426 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3427 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3428 ResourceMark rm(THREAD); 3429 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3430 } 3431 3432 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3433 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3434 3435 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3436 3437 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3438 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3439 3440 // Make sure klass is initialized, since we are about to instantiate one of them. 3441 curr_klass->initialize(CHECK_NULL); 3442 3443 methodHandle m (THREAD, 3444 init_klass->find_method(vmSymbols::object_initializer_name(), 3445 vmSymbols::void_method_signature())); 3446 if (m.is_null()) { 3447 ResourceMark rm(THREAD); 3448 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3449 Method::name_and_sig_as_C_string(init_klass(), 3450 vmSymbols::object_initializer_name(), 3451 vmSymbols::void_method_signature())); 3452 } 3453 3454 if (curr_klass == init_klass && !m->is_public()) { 3455 // Calling the constructor for class 'curr_klass'. 3456 // Only allow calls to a public no-arg constructor. 3457 // This path corresponds to creating an Externalizable object. 3458 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3459 } 3460 3461 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3462 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3463 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3464 } 3465 3466 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3467 // Call constructor m. This might call a constructor higher up in the hierachy 3468 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3469 3470 return JNIHandles::make_local(obj()); 3471 JVM_END 3472 3473 3474 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3475 JVMWrapper("JVM_AllocateNewArray"); 3476 JvmtiVMObjectAllocEventCollector oam; 3477 oop mirror = JNIHandles::resolve_non_null(currClass); 3478 3479 if (java_lang_Class::is_primitive(mirror)) { 3480 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3481 } 3482 Klass* k = java_lang_Class::as_Klass(mirror); 3483 oop result; 3484 3485 if (k->oop_is_typeArray()) { 3486 // typeArray 3487 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3488 } else if (k->oop_is_objArray()) { 3489 // objArray 3490 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3491 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3492 result = oak->allocate(length, CHECK_NULL); 3493 } else { 3494 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3495 } 3496 return JNIHandles::make_local(env, result); 3497 JVM_END 3498 3499 3500 // Return the first non-null class loader up the execution stack, or null 3501 // if only code from the null class loader is on the stack. 3502 3503 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3504 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3505 // UseNewReflection 3506 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3507 oop loader = vfst.method()->method_holder()->class_loader(); 3508 if (loader != NULL) { 3509 return JNIHandles::make_local(env, loader); 3510 } 3511 } 3512 return NULL; 3513 JVM_END 3514 3515 3516 // Load a class relative to the most recent class on the stack with a non-null 3517 // classloader. 3518 // This function has been deprecated and should not be considered part of the 3519 // specified JVM interface. 3520 3521 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3522 jclass currClass, jstring currClassName)) 3523 JVMWrapper("JVM_LoadClass0"); 3524 // Receiver is not used 3525 ResourceMark rm(THREAD); 3526 3527 // Class name argument is not guaranteed to be in internal format 3528 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3529 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3530 3531 const char* str = java_lang_String::as_utf8_string(string()); 3532 3533 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3534 // It's impossible to create this class; the name cannot fit 3535 // into the constant pool. 3536 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3537 } 3538 3539 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3540 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3541 // Find the most recent class on the stack with a non-null classloader 3542 oop loader = NULL; 3543 oop protection_domain = NULL; 3544 if (curr_klass.is_null()) { 3545 for (vframeStream vfst(thread); 3546 !vfst.at_end() && loader == NULL; 3547 vfst.next()) { 3548 if (!vfst.method()->is_native()) { 3549 InstanceKlass* holder = vfst.method()->method_holder(); 3550 loader = holder->class_loader(); 3551 protection_domain = holder->protection_domain(); 3552 } 3553 } 3554 } else { 3555 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3556 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3557 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3558 } 3559 Handle h_loader(THREAD, loader); 3560 Handle h_prot (THREAD, protection_domain); 3561 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3562 false, thread); 3563 if (TraceClassResolution && result != NULL) { 3564 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3565 } 3566 return result; 3567 JVM_END 3568 3569 3570 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3571 3572 3573 // resolve array handle and check arguments 3574 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3575 if (arr == NULL) { 3576 THROW_0(vmSymbols::java_lang_NullPointerException()); 3577 } 3578 oop a = JNIHandles::resolve_non_null(arr); 3579 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3580 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3581 } 3582 return arrayOop(a); 3583 } 3584 3585 3586 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3587 JVMWrapper("JVM_GetArrayLength"); 3588 arrayOop a = check_array(env, arr, false, CHECK_0); 3589 return a->length(); 3590 JVM_END 3591 3592 3593 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3594 JVMWrapper("JVM_Array_Get"); 3595 JvmtiVMObjectAllocEventCollector oam; 3596 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3597 jvalue value; 3598 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3599 oop box = Reflection::box(&value, type, CHECK_NULL); 3600 return JNIHandles::make_local(env, box); 3601 JVM_END 3602 3603 3604 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3605 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3606 jvalue value; 3607 value.i = 0; // to initialize value before getting used in CHECK 3608 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3609 assert(a->is_typeArray(), "just checking"); 3610 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3611 BasicType wide_type = (BasicType) wCode; 3612 if (type != wide_type) { 3613 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3614 } 3615 return value; 3616 JVM_END 3617 3618 3619 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3620 JVMWrapper("JVM_SetArrayElement"); 3621 arrayOop a = check_array(env, arr, false, CHECK); 3622 oop box = JNIHandles::resolve(val); 3623 jvalue value; 3624 value.i = 0; // to initialize value before getting used in CHECK 3625 BasicType value_type; 3626 if (a->is_objArray()) { 3627 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3628 value_type = Reflection::unbox_for_regular_object(box, &value); 3629 } else { 3630 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3631 } 3632 Reflection::array_set(&value, a, index, value_type, CHECK); 3633 JVM_END 3634 3635 3636 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3637 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3638 arrayOop a = check_array(env, arr, true, CHECK); 3639 assert(a->is_typeArray(), "just checking"); 3640 BasicType value_type = (BasicType) vCode; 3641 Reflection::array_set(&v, a, index, value_type, CHECK); 3642 JVM_END 3643 3644 3645 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3646 JVMWrapper("JVM_NewArray"); 3647 JvmtiVMObjectAllocEventCollector oam; 3648 oop element_mirror = JNIHandles::resolve(eltClass); 3649 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3650 return JNIHandles::make_local(env, result); 3651 JVM_END 3652 3653 3654 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3655 JVMWrapper("JVM_NewMultiArray"); 3656 JvmtiVMObjectAllocEventCollector oam; 3657 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3658 oop element_mirror = JNIHandles::resolve(eltClass); 3659 assert(dim_array->is_typeArray(), "just checking"); 3660 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3661 return JNIHandles::make_local(env, result); 3662 JVM_END 3663 3664 3665 // Networking library support //////////////////////////////////////////////////////////////////// 3666 3667 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3668 JVMWrapper("JVM_InitializeSocketLibrary"); 3669 return 0; 3670 JVM_END 3671 3672 3673 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3674 JVMWrapper("JVM_Socket"); 3675 return os::socket(domain, type, protocol); 3676 JVM_END 3677 3678 3679 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3680 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3681 //%note jvm_r6 3682 return os::socket_close(fd); 3683 JVM_END 3684 3685 3686 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3687 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3688 //%note jvm_r6 3689 return os::socket_shutdown(fd, howto); 3690 JVM_END 3691 3692 3693 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3694 JVMWrapper2("JVM_Recv (0x%x)", fd); 3695 //%note jvm_r6 3696 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3697 JVM_END 3698 3699 3700 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3701 JVMWrapper2("JVM_Send (0x%x)", fd); 3702 //%note jvm_r6 3703 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3704 JVM_END 3705 3706 3707 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3708 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3709 //%note jvm_r6 3710 return os::timeout(fd, timeout); 3711 JVM_END 3712 3713 3714 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3715 JVMWrapper2("JVM_Listen (0x%x)", fd); 3716 //%note jvm_r6 3717 return os::listen(fd, count); 3718 JVM_END 3719 3720 3721 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3722 JVMWrapper2("JVM_Connect (0x%x)", fd); 3723 //%note jvm_r6 3724 return os::connect(fd, him, (socklen_t)len); 3725 JVM_END 3726 3727 3728 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3729 JVMWrapper2("JVM_Bind (0x%x)", fd); 3730 //%note jvm_r6 3731 return os::bind(fd, him, (socklen_t)len); 3732 JVM_END 3733 3734 3735 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3736 JVMWrapper2("JVM_Accept (0x%x)", fd); 3737 //%note jvm_r6 3738 socklen_t socklen = (socklen_t)(*len); 3739 jint result = os::accept(fd, him, &socklen); 3740 *len = (jint)socklen; 3741 return result; 3742 JVM_END 3743 3744 3745 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3746 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3747 //%note jvm_r6 3748 socklen_t socklen = (socklen_t)(*fromlen); 3749 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3750 *fromlen = (int)socklen; 3751 return result; 3752 JVM_END 3753 3754 3755 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3756 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3757 //%note jvm_r6 3758 socklen_t socklen = (socklen_t)(*len); 3759 jint result = os::get_sock_name(fd, him, &socklen); 3760 *len = (int)socklen; 3761 return result; 3762 JVM_END 3763 3764 3765 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3766 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3767 //%note jvm_r6 3768 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3769 JVM_END 3770 3771 3772 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3773 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3774 //%note jvm_r6 3775 return os::socket_available(fd, pbytes); 3776 JVM_END 3777 3778 3779 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3780 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3781 //%note jvm_r6 3782 socklen_t socklen = (socklen_t)(*optlen); 3783 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3784 *optlen = (int)socklen; 3785 return result; 3786 JVM_END 3787 3788 3789 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3790 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3791 //%note jvm_r6 3792 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3793 JVM_END 3794 3795 3796 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3797 JVMWrapper("JVM_GetHostName"); 3798 return os::get_host_name(name, namelen); 3799 JVM_END 3800 3801 3802 // Library support /////////////////////////////////////////////////////////////////////////// 3803 3804 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3805 //%note jvm_ct 3806 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3807 char ebuf[1024]; 3808 void *load_result; 3809 { 3810 ThreadToNativeFromVM ttnfvm(thread); 3811 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3812 } 3813 if (load_result == NULL) { 3814 char msg[1024]; 3815 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3816 // Since 'ebuf' may contain a string encoded using 3817 // platform encoding scheme, we need to pass 3818 // Exceptions::unsafe_to_utf8 to the new_exception method 3819 // as the last argument. See bug 6367357. 3820 Handle h_exception = 3821 Exceptions::new_exception(thread, 3822 vmSymbols::java_lang_UnsatisfiedLinkError(), 3823 msg, Exceptions::unsafe_to_utf8); 3824 3825 THROW_HANDLE_0(h_exception); 3826 } 3827 return load_result; 3828 JVM_END 3829 3830 3831 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3832 JVMWrapper("JVM_UnloadLibrary"); 3833 os::dll_unload(handle); 3834 JVM_END 3835 3836 3837 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3838 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3839 return os::dll_lookup(handle, name); 3840 JVM_END 3841 3842 3843 // Floating point support //////////////////////////////////////////////////////////////////// 3844 3845 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3846 JVMWrapper("JVM_IsNaN"); 3847 return g_isnan(a); 3848 JVM_END 3849 3850 3851 // JNI version /////////////////////////////////////////////////////////////////////////////// 3852 3853 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3854 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3855 return Threads::is_supported_jni_version_including_1_1(version); 3856 JVM_END 3857 3858 3859 // String support /////////////////////////////////////////////////////////////////////////// 3860 3861 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3862 JVMWrapper("JVM_InternString"); 3863 JvmtiVMObjectAllocEventCollector oam; 3864 if (str == NULL) return NULL; 3865 oop string = JNIHandles::resolve_non_null(str); 3866 oop result = StringTable::intern(string, CHECK_NULL); 3867 return (jstring) JNIHandles::make_local(env, result); 3868 JVM_END 3869 3870 3871 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3872 3873 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3874 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3875 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3876 // that only works with java threads. 3877 3878 3879 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3880 VM_Exit::block_if_vm_exited(); 3881 JVMWrapper("JVM_RawMonitorCreate"); 3882 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3883 } 3884 3885 3886 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3887 VM_Exit::block_if_vm_exited(); 3888 JVMWrapper("JVM_RawMonitorDestroy"); 3889 delete ((Mutex*) mon); 3890 } 3891 3892 3893 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3894 VM_Exit::block_if_vm_exited(); 3895 JVMWrapper("JVM_RawMonitorEnter"); 3896 ((Mutex*) mon)->jvm_raw_lock(); 3897 return 0; 3898 } 3899 3900 3901 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3902 VM_Exit::block_if_vm_exited(); 3903 JVMWrapper("JVM_RawMonitorExit"); 3904 ((Mutex*) mon)->jvm_raw_unlock(); 3905 } 3906 3907 3908 // Support for Serialization 3909 3910 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3911 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3912 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3913 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3914 3915 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3916 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3917 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3918 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3919 3920 3921 void initialize_converter_functions() { 3922 if (JDK_Version::is_gte_jdk14x_version()) { 3923 // These functions only exist for compatibility with 1.3.1 and earlier 3924 return; 3925 } 3926 3927 // called from universe_post_init() 3928 assert( 3929 int_bits_to_float_fn == NULL && 3930 long_bits_to_double_fn == NULL && 3931 float_to_int_bits_fn == NULL && 3932 double_to_long_bits_fn == NULL , 3933 "initialization done twice" 3934 ); 3935 // initialize 3936 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3937 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3938 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3939 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3940 // verify 3941 assert( 3942 int_bits_to_float_fn != NULL && 3943 long_bits_to_double_fn != NULL && 3944 float_to_int_bits_fn != NULL && 3945 double_to_long_bits_fn != NULL , 3946 "initialization failed" 3947 ); 3948 } 3949 3950 3951 3952 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3953 3954 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3955 // Security Note: 3956 // The Java level wrapper will perform the necessary security check allowing 3957 // us to pass the NULL as the initiating class loader. 3958 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3959 3960 KlassHandle klass_handle(THREAD, klass); 3961 // Check if we should initialize the class 3962 if (init && klass_handle->oop_is_instance()) { 3963 klass_handle->initialize(CHECK_NULL); 3964 } 3965 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3966 } 3967 3968 3969 // Method /////////////////////////////////////////////////////////////////////////////////////////// 3970 3971 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3972 JVMWrapper("JVM_InvokeMethod"); 3973 Handle method_handle; 3974 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3975 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3976 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3977 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3978 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3979 jobject res = JNIHandles::make_local(env, result); 3980 if (JvmtiExport::should_post_vm_object_alloc()) { 3981 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 3982 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 3983 if (java_lang_Class::is_primitive(ret_type)) { 3984 // Only for primitive type vm allocates memory for java object. 3985 // See box() method. 3986 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 3987 } 3988 } 3989 return res; 3990 } else { 3991 THROW_0(vmSymbols::java_lang_StackOverflowError()); 3992 } 3993 JVM_END 3994 3995 3996 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 3997 JVMWrapper("JVM_NewInstanceFromConstructor"); 3998 oop constructor_mirror = JNIHandles::resolve(c); 3999 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4000 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4001 jobject res = JNIHandles::make_local(env, result); 4002 if (JvmtiExport::should_post_vm_object_alloc()) { 4003 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4004 } 4005 return res; 4006 JVM_END 4007 4008 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4009 4010 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4011 JVMWrapper("JVM_SupportsCX8"); 4012 return VM_Version::supports_cx8(); 4013 JVM_END 4014 4015 4016 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4017 JVMWrapper("JVM_CX8Field"); 4018 jlong res; 4019 oop o = JNIHandles::resolve(obj); 4020 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4021 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4022 4023 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4024 res = Atomic::cmpxchg(newVal, addr, oldVal); 4025 4026 return res == oldVal; 4027 JVM_END 4028 4029 // DTrace /////////////////////////////////////////////////////////////////// 4030 4031 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4032 JVMWrapper("JVM_DTraceGetVersion"); 4033 return (jint)JVM_TRACING_DTRACE_VERSION; 4034 JVM_END 4035 4036 JVM_ENTRY(jlong,JVM_DTraceActivate( 4037 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4038 JVM_DTraceProvider* providers)) 4039 JVMWrapper("JVM_DTraceActivate"); 4040 return DTraceJSDT::activate( 4041 version, module_name, providers_count, providers, CHECK_0); 4042 JVM_END 4043 4044 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4045 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4046 return DTraceJSDT::is_probe_enabled(method); 4047 JVM_END 4048 4049 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4050 JVMWrapper("JVM_DTraceDispose"); 4051 DTraceJSDT::dispose(handle); 4052 JVM_END 4053 4054 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4055 JVMWrapper("JVM_DTraceIsSupported"); 4056 return DTraceJSDT::is_supported(); 4057 JVM_END 4058 4059 // Returns an array of all live Thread objects (VM internal JavaThreads, 4060 // jvmti agent threads, and JNI attaching threads are skipped) 4061 // See CR 6404306 regarding JNI attaching threads 4062 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4063 ResourceMark rm(THREAD); 4064 ThreadsListEnumerator tle(THREAD, false, false); 4065 JvmtiVMObjectAllocEventCollector oam; 4066 4067 int num_threads = tle.num_threads(); 4068 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4069 objArrayHandle threads_ah(THREAD, r); 4070 4071 for (int i = 0; i < num_threads; i++) { 4072 Handle h = tle.get_threadObj(i); 4073 threads_ah->obj_at_put(i, h()); 4074 } 4075 4076 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4077 JVM_END 4078 4079 4080 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4081 // Return StackTraceElement[][], each element is the stack trace of a thread in 4082 // the corresponding entry in the given threads array 4083 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4084 JVMWrapper("JVM_DumpThreads"); 4085 JvmtiVMObjectAllocEventCollector oam; 4086 4087 // Check if threads is null 4088 if (threads == NULL) { 4089 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4090 } 4091 4092 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4093 objArrayHandle ah(THREAD, a); 4094 int num_threads = ah->length(); 4095 // check if threads is non-empty array 4096 if (num_threads == 0) { 4097 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4098 } 4099 4100 // check if threads is not an array of objects of Thread class 4101 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4102 if (k != SystemDictionary::Thread_klass()) { 4103 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4104 } 4105 4106 ResourceMark rm(THREAD); 4107 4108 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4109 for (int i = 0; i < num_threads; i++) { 4110 oop thread_obj = ah->obj_at(i); 4111 instanceHandle h(THREAD, (instanceOop) thread_obj); 4112 thread_handle_array->append(h); 4113 } 4114 4115 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4116 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4117 4118 JVM_END 4119 4120 // JVM monitoring and management support 4121 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4122 return Management::get_jmm_interface(version); 4123 JVM_END 4124 4125 // com.sun.tools.attach.VirtualMachine agent properties support 4126 // 4127 // Initialize the agent properties with the properties maintained in the VM 4128 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4129 JVMWrapper("JVM_InitAgentProperties"); 4130 ResourceMark rm; 4131 4132 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4133 4134 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4135 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4136 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4137 return properties; 4138 JVM_END 4139 4140 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4141 { 4142 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4143 JvmtiVMObjectAllocEventCollector oam; 4144 4145 if (ofClass == NULL) { 4146 return NULL; 4147 } 4148 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4149 // Special handling for primitive objects 4150 if (java_lang_Class::is_primitive(mirror())) { 4151 return NULL; 4152 } 4153 Klass* k = java_lang_Class::as_Klass(mirror()); 4154 if (!k->oop_is_instance()) { 4155 return NULL; 4156 } 4157 instanceKlassHandle ik_h(THREAD, k); 4158 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4159 if (encl_method_class_idx == 0) { 4160 return NULL; 4161 } 4162 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4163 objArrayHandle dest(THREAD, dest_o); 4164 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4165 dest->obj_at_put(0, enc_k->java_mirror()); 4166 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4167 if (encl_method_method_idx != 0) { 4168 Symbol* sym = ik_h->constants()->symbol_at( 4169 extract_low_short_from_int( 4170 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4171 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4172 dest->obj_at_put(1, str()); 4173 sym = ik_h->constants()->symbol_at( 4174 extract_high_short_from_int( 4175 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4176 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4177 dest->obj_at_put(2, str()); 4178 } 4179 return (jobjectArray) JNIHandles::make_local(dest()); 4180 } 4181 JVM_END 4182 4183 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4184 jint javaThreadState)) 4185 { 4186 // If new thread states are added in future JDK and VM versions, 4187 // this should check if the JDK version is compatible with thread 4188 // states supported by the VM. Return NULL if not compatible. 4189 // 4190 // This function must map the VM java_lang_Thread::ThreadStatus 4191 // to the Java thread state that the JDK supports. 4192 // 4193 4194 typeArrayHandle values_h; 4195 switch (javaThreadState) { 4196 case JAVA_THREAD_STATE_NEW : { 4197 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4198 values_h = typeArrayHandle(THREAD, r); 4199 values_h->int_at_put(0, java_lang_Thread::NEW); 4200 break; 4201 } 4202 case JAVA_THREAD_STATE_RUNNABLE : { 4203 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4204 values_h = typeArrayHandle(THREAD, r); 4205 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4206 break; 4207 } 4208 case JAVA_THREAD_STATE_BLOCKED : { 4209 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4210 values_h = typeArrayHandle(THREAD, r); 4211 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4212 break; 4213 } 4214 case JAVA_THREAD_STATE_WAITING : { 4215 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4216 values_h = typeArrayHandle(THREAD, r); 4217 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4218 values_h->int_at_put(1, java_lang_Thread::PARKED); 4219 break; 4220 } 4221 case JAVA_THREAD_STATE_TIMED_WAITING : { 4222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4223 values_h = typeArrayHandle(THREAD, r); 4224 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4225 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4226 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4227 break; 4228 } 4229 case JAVA_THREAD_STATE_TERMINATED : { 4230 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4231 values_h = typeArrayHandle(THREAD, r); 4232 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4233 break; 4234 } 4235 default: 4236 // Unknown state - probably incompatible JDK version 4237 return NULL; 4238 } 4239 4240 return (jintArray) JNIHandles::make_local(env, values_h()); 4241 } 4242 JVM_END 4243 4244 4245 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4246 jint javaThreadState, 4247 jintArray values)) 4248 { 4249 // If new thread states are added in future JDK and VM versions, 4250 // this should check if the JDK version is compatible with thread 4251 // states supported by the VM. Return NULL if not compatible. 4252 // 4253 // This function must map the VM java_lang_Thread::ThreadStatus 4254 // to the Java thread state that the JDK supports. 4255 // 4256 4257 ResourceMark rm; 4258 4259 // Check if threads is null 4260 if (values == NULL) { 4261 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4262 } 4263 4264 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4265 typeArrayHandle values_h(THREAD, v); 4266 4267 objArrayHandle names_h; 4268 switch (javaThreadState) { 4269 case JAVA_THREAD_STATE_NEW : { 4270 assert(values_h->length() == 1 && 4271 values_h->int_at(0) == java_lang_Thread::NEW, 4272 "Invalid threadStatus value"); 4273 4274 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4275 1, /* only 1 substate */ 4276 CHECK_NULL); 4277 names_h = objArrayHandle(THREAD, r); 4278 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4279 names_h->obj_at_put(0, name()); 4280 break; 4281 } 4282 case JAVA_THREAD_STATE_RUNNABLE : { 4283 assert(values_h->length() == 1 && 4284 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4285 "Invalid threadStatus value"); 4286 4287 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4288 1, /* only 1 substate */ 4289 CHECK_NULL); 4290 names_h = objArrayHandle(THREAD, r); 4291 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4292 names_h->obj_at_put(0, name()); 4293 break; 4294 } 4295 case JAVA_THREAD_STATE_BLOCKED : { 4296 assert(values_h->length() == 1 && 4297 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4298 "Invalid threadStatus value"); 4299 4300 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4301 1, /* only 1 substate */ 4302 CHECK_NULL); 4303 names_h = objArrayHandle(THREAD, r); 4304 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4305 names_h->obj_at_put(0, name()); 4306 break; 4307 } 4308 case JAVA_THREAD_STATE_WAITING : { 4309 assert(values_h->length() == 2 && 4310 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4311 values_h->int_at(1) == java_lang_Thread::PARKED, 4312 "Invalid threadStatus value"); 4313 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4314 2, /* number of substates */ 4315 CHECK_NULL); 4316 names_h = objArrayHandle(THREAD, r); 4317 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4318 CHECK_NULL); 4319 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4320 CHECK_NULL); 4321 names_h->obj_at_put(0, name0()); 4322 names_h->obj_at_put(1, name1()); 4323 break; 4324 } 4325 case JAVA_THREAD_STATE_TIMED_WAITING : { 4326 assert(values_h->length() == 3 && 4327 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4328 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4329 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4330 "Invalid threadStatus value"); 4331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4332 3, /* number of substates */ 4333 CHECK_NULL); 4334 names_h = objArrayHandle(THREAD, r); 4335 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4336 CHECK_NULL); 4337 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4338 CHECK_NULL); 4339 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4340 CHECK_NULL); 4341 names_h->obj_at_put(0, name0()); 4342 names_h->obj_at_put(1, name1()); 4343 names_h->obj_at_put(2, name2()); 4344 break; 4345 } 4346 case JAVA_THREAD_STATE_TERMINATED : { 4347 assert(values_h->length() == 1 && 4348 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4349 "Invalid threadStatus value"); 4350 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4351 1, /* only 1 substate */ 4352 CHECK_NULL); 4353 names_h = objArrayHandle(THREAD, r); 4354 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4355 names_h->obj_at_put(0, name()); 4356 break; 4357 } 4358 default: 4359 // Unknown state - probably incompatible JDK version 4360 return NULL; 4361 } 4362 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4363 } 4364 JVM_END 4365 4366 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4367 { 4368 memset(info, 0, info_size); 4369 4370 info->jvm_version = Abstract_VM_Version::jvm_version(); 4371 info->update_version = 0; /* 0 in HotSpot Express VM */ 4372 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4373 4374 // when we add a new capability in the jvm_version_info struct, we should also 4375 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4376 // counter defined in runtimeService.cpp. 4377 info->is_attachable = AttachListener::is_attach_supported(); 4378 } 4379 JVM_END