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 // new ProtectionDomain(null,null); 1164 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); 1165 Handle null_pd(THREAD, null_protection_domain); 1166 1167 // new ProtectionDomain[] {pd}; 1168 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1169 context->obj_at_put(0, null_pd()); 1170 1171 // new AccessControlContext(new ProtectionDomain[] {pd}) 1172 objArrayHandle h_context(THREAD, context); 1173 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1174 return result; 1175 } 1176 1177 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1178 JVMWrapper("JVM_DoPrivileged"); 1179 1180 if (action == NULL) { 1181 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1182 } 1183 1184 // Compute the frame initiating the do privileged operation and setup the privileged stack 1185 vframeStream vfst(thread); 1186 vfst.security_get_caller_frame(1); 1187 1188 if (vfst.at_end()) { 1189 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1190 } 1191 1192 Method* method = vfst.method(); 1193 instanceKlassHandle klass (THREAD, method->method_holder()); 1194 1195 // Check that action object understands "Object run()" 1196 Handle h_context; 1197 if (context != NULL) { 1198 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1199 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1200 if (!authorized) { 1201 // Create an unprivileged access control object and call it's run function 1202 // instead. 1203 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1204 h_context = Handle(THREAD, noprivs); 1205 } 1206 } 1207 1208 // Check that action object understands "Object run()" 1209 Handle object (THREAD, JNIHandles::resolve(action)); 1210 1211 // get run() method 1212 Method* m_oop = object->klass()->uncached_lookup_method( 1213 vmSymbols::run_method_name(), 1214 vmSymbols::void_object_signature()); 1215 methodHandle m (THREAD, m_oop); 1216 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1217 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1218 } 1219 1220 // Stack allocated list of privileged stack elements 1221 PrivilegedElement pi; 1222 if (!vfst.at_end()) { 1223 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1224 thread->set_privileged_stack_top(&pi); 1225 } 1226 1227 1228 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1229 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1230 Handle pending_exception; 1231 JavaValue result(T_OBJECT); 1232 JavaCallArguments args(object); 1233 JavaCalls::call(&result, m, &args, THREAD); 1234 1235 // done with action, remove ourselves from the list 1236 if (!vfst.at_end()) { 1237 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1238 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1239 } 1240 1241 if (HAS_PENDING_EXCEPTION) { 1242 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1243 CLEAR_PENDING_EXCEPTION; 1244 1245 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1246 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1247 // Throw a java.security.PrivilegedActionException(Exception e) exception 1248 JavaCallArguments args(pending_exception); 1249 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1250 vmSymbols::exception_void_signature(), 1251 &args); 1252 } 1253 } 1254 1255 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1256 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1257 JVM_END 1258 1259 1260 // Returns the inherited_access_control_context field of the running thread. 1261 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1262 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1263 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1264 return JNIHandles::make_local(env, result); 1265 JVM_END 1266 1267 class RegisterArrayForGC { 1268 private: 1269 JavaThread *_thread; 1270 public: 1271 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1272 _thread = thread; 1273 _thread->register_array_for_gc(array); 1274 } 1275 1276 ~RegisterArrayForGC() { 1277 _thread->register_array_for_gc(NULL); 1278 } 1279 }; 1280 1281 1282 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1283 JVMWrapper("JVM_GetStackAccessControlContext"); 1284 if (!UsePrivilegedStack) return NULL; 1285 1286 ResourceMark rm(THREAD); 1287 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1288 JvmtiVMObjectAllocEventCollector oam; 1289 1290 // count the protection domains on the execution stack. We collapse 1291 // duplicate consecutive protection domains into a single one, as 1292 // well as stopping when we hit a privileged frame. 1293 1294 // Use vframeStream to iterate through Java frames 1295 vframeStream vfst(thread); 1296 1297 oop previous_protection_domain = NULL; 1298 Handle privileged_context(thread, NULL); 1299 bool is_privileged = false; 1300 oop protection_domain = NULL; 1301 1302 for(; !vfst.at_end(); vfst.next()) { 1303 // get method of frame 1304 Method* method = vfst.method(); 1305 intptr_t* frame_id = vfst.frame_id(); 1306 1307 // check the privileged frames to see if we have a match 1308 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1309 // this frame is privileged 1310 is_privileged = true; 1311 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1312 protection_domain = thread->privileged_stack_top()->protection_domain(); 1313 } else { 1314 protection_domain = method->method_holder()->protection_domain(); 1315 } 1316 1317 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1318 local_array->push(protection_domain); 1319 previous_protection_domain = protection_domain; 1320 } 1321 1322 if (is_privileged) break; 1323 } 1324 1325 1326 // either all the domains on the stack were system domains, or 1327 // we had a privileged system domain 1328 if (local_array->is_empty()) { 1329 if (is_privileged && privileged_context.is_null()) return NULL; 1330 1331 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1332 return JNIHandles::make_local(env, result); 1333 } 1334 1335 // the resource area must be registered in case of a gc 1336 RegisterArrayForGC ragc(thread, local_array); 1337 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1338 local_array->length(), CHECK_NULL); 1339 objArrayHandle h_context(thread, context); 1340 for (int index = 0; index < local_array->length(); index++) { 1341 h_context->obj_at_put(index, local_array->at(index)); 1342 } 1343 1344 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1345 1346 return JNIHandles::make_local(env, result); 1347 JVM_END 1348 1349 1350 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1351 JVMWrapper("JVM_IsArrayClass"); 1352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1353 return (k != NULL) && k->oop_is_array() ? true : false; 1354 JVM_END 1355 1356 1357 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1358 JVMWrapper("JVM_IsPrimitiveClass"); 1359 oop mirror = JNIHandles::resolve_non_null(cls); 1360 return (jboolean) java_lang_Class::is_primitive(mirror); 1361 JVM_END 1362 1363 1364 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1365 JVMWrapper("JVM_GetComponentType"); 1366 oop mirror = JNIHandles::resolve_non_null(cls); 1367 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1368 return (jclass) JNIHandles::make_local(env, result); 1369 JVM_END 1370 1371 1372 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1373 JVMWrapper("JVM_GetClassModifiers"); 1374 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1375 // Primitive type 1376 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1377 } 1378 1379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1380 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1381 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1382 return k->modifier_flags(); 1383 JVM_END 1384 1385 1386 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1387 1388 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1389 JvmtiVMObjectAllocEventCollector oam; 1390 // ofClass is a reference to a java_lang_Class object. The mirror object 1391 // of an InstanceKlass 1392 1393 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1394 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1395 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1396 return (jobjectArray)JNIHandles::make_local(env, result); 1397 } 1398 1399 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1400 InnerClassesIterator iter(k); 1401 1402 if (iter.length() == 0) { 1403 // Neither an inner nor outer class 1404 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1405 return (jobjectArray)JNIHandles::make_local(env, result); 1406 } 1407 1408 // find inner class info 1409 constantPoolHandle cp(thread, k->constants()); 1410 int length = iter.length(); 1411 1412 // Allocate temp. result array 1413 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1414 objArrayHandle result (THREAD, r); 1415 int members = 0; 1416 1417 for (; !iter.done(); iter.next()) { 1418 int ioff = iter.inner_class_info_index(); 1419 int ooff = iter.outer_class_info_index(); 1420 1421 if (ioff != 0 && ooff != 0) { 1422 // Check to see if the name matches the class we're looking for 1423 // before attempting to find the class. 1424 if (cp->klass_name_at_matches(k, ooff)) { 1425 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1426 if (outer_klass == k()) { 1427 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1428 instanceKlassHandle inner_klass (THREAD, ik); 1429 1430 // Throws an exception if outer klass has not declared k as 1431 // an inner klass 1432 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1433 1434 result->obj_at_put(members, inner_klass->java_mirror()); 1435 members++; 1436 } 1437 } 1438 } 1439 } 1440 1441 if (members != length) { 1442 // Return array of right length 1443 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1444 for(int i = 0; i < members; i++) { 1445 res->obj_at_put(i, result->obj_at(i)); 1446 } 1447 return (jobjectArray)JNIHandles::make_local(env, res); 1448 } 1449 1450 return (jobjectArray)JNIHandles::make_local(env, result()); 1451 JVM_END 1452 1453 1454 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1455 { 1456 // ofClass is a reference to a java_lang_Class object. 1457 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1458 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1459 return NULL; 1460 } 1461 1462 bool inner_is_member = false; 1463 Klass* outer_klass 1464 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1465 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1466 if (outer_klass == NULL) return NULL; // already a top-level class 1467 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1468 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1469 } 1470 JVM_END 1471 1472 // should be in InstanceKlass.cpp, but is here for historical reasons 1473 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1474 bool* inner_is_member, 1475 TRAPS) { 1476 Thread* thread = THREAD; 1477 InnerClassesIterator iter(k); 1478 if (iter.length() == 0) { 1479 // No inner class info => no declaring class 1480 return NULL; 1481 } 1482 1483 constantPoolHandle i_cp(thread, k->constants()); 1484 1485 bool found = false; 1486 Klass* ok; 1487 instanceKlassHandle outer_klass; 1488 *inner_is_member = false; 1489 1490 // Find inner_klass attribute 1491 for (; !iter.done() && !found; iter.next()) { 1492 int ioff = iter.inner_class_info_index(); 1493 int ooff = iter.outer_class_info_index(); 1494 int noff = iter.inner_name_index(); 1495 if (ioff != 0) { 1496 // Check to see if the name matches the class we're looking for 1497 // before attempting to find the class. 1498 if (i_cp->klass_name_at_matches(k, ioff)) { 1499 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1500 found = (k() == inner_klass); 1501 if (found && ooff != 0) { 1502 ok = i_cp->klass_at(ooff, CHECK_NULL); 1503 outer_klass = instanceKlassHandle(thread, ok); 1504 *inner_is_member = true; 1505 } 1506 } 1507 } 1508 } 1509 1510 if (found && outer_klass.is_null()) { 1511 // It may be anonymous; try for that. 1512 int encl_method_class_idx = k->enclosing_method_class_index(); 1513 if (encl_method_class_idx != 0) { 1514 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1515 outer_klass = instanceKlassHandle(thread, ok); 1516 *inner_is_member = false; 1517 } 1518 } 1519 1520 // If no inner class attribute found for this class. 1521 if (outer_klass.is_null()) return NULL; 1522 1523 // Throws an exception if outer klass has not declared k as an inner klass 1524 // We need evidence that each klass knows about the other, or else 1525 // the system could allow a spoof of an inner class to gain access rights. 1526 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1527 return outer_klass(); 1528 } 1529 1530 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1531 assert (cls != NULL, "illegal class"); 1532 JVMWrapper("JVM_GetClassSignature"); 1533 JvmtiVMObjectAllocEventCollector oam; 1534 ResourceMark rm(THREAD); 1535 // Return null for arrays and primatives 1536 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1537 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1538 if (k->oop_is_instance()) { 1539 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1540 if (sym == NULL) return NULL; 1541 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1542 return (jstring) JNIHandles::make_local(env, str()); 1543 } 1544 } 1545 return NULL; 1546 JVM_END 1547 1548 1549 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1550 assert (cls != NULL, "illegal class"); 1551 JVMWrapper("JVM_GetClassAnnotations"); 1552 1553 // Return null for arrays and primitives 1554 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1555 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1556 if (k->oop_is_instance()) { 1557 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1558 return (jbyteArray) JNIHandles::make_local(env, a); 1559 } 1560 } 1561 return NULL; 1562 JVM_END 1563 1564 1565 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1566 // some of this code was adapted from from jni_FromReflectedField 1567 1568 oop reflected = JNIHandles::resolve_non_null(field); 1569 oop mirror = java_lang_reflect_Field::clazz(reflected); 1570 Klass* k = java_lang_Class::as_Klass(mirror); 1571 int slot = java_lang_reflect_Field::slot(reflected); 1572 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1573 1574 KlassHandle kh(THREAD, k); 1575 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1576 1577 if (modifiers & JVM_ACC_STATIC) { 1578 // for static fields we only look in the current class 1579 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1580 assert(false, "cannot find static field"); 1581 return false; 1582 } 1583 } else { 1584 // for instance fields we start with the current class and work 1585 // our way up through the superclass chain 1586 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1587 assert(false, "cannot find instance field"); 1588 return false; 1589 } 1590 } 1591 return true; 1592 } 1593 1594 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1595 // field is a handle to a java.lang.reflect.Field object 1596 assert(field != NULL, "illegal field"); 1597 JVMWrapper("JVM_GetFieldAnnotations"); 1598 1599 fieldDescriptor fd; 1600 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1601 if (!gotFd) { 1602 return NULL; 1603 } 1604 1605 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1606 JVM_END 1607 1608 1609 static Method* jvm_get_method_common(jobject method) { 1610 // some of this code was adapted from from jni_FromReflectedMethod 1611 1612 oop reflected = JNIHandles::resolve_non_null(method); 1613 oop mirror = NULL; 1614 int slot = 0; 1615 1616 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1617 mirror = java_lang_reflect_Constructor::clazz(reflected); 1618 slot = java_lang_reflect_Constructor::slot(reflected); 1619 } else { 1620 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1621 "wrong type"); 1622 mirror = java_lang_reflect_Method::clazz(reflected); 1623 slot = java_lang_reflect_Method::slot(reflected); 1624 } 1625 Klass* k = java_lang_Class::as_Klass(mirror); 1626 1627 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1628 assert(m != NULL, "cannot find method"); 1629 return m; // caller has to deal with NULL in product mode 1630 } 1631 1632 1633 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1634 JVMWrapper("JVM_GetMethodAnnotations"); 1635 1636 // method is a handle to a java.lang.reflect.Method object 1637 Method* m = jvm_get_method_common(method); 1638 if (m == NULL) { 1639 return NULL; 1640 } 1641 1642 return (jbyteArray) JNIHandles::make_local(env, 1643 Annotations::make_java_array(m->annotations(), THREAD)); 1644 JVM_END 1645 1646 1647 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1648 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1649 1650 // method is a handle to a java.lang.reflect.Method object 1651 Method* m = jvm_get_method_common(method); 1652 if (m == NULL) { 1653 return NULL; 1654 } 1655 1656 return (jbyteArray) JNIHandles::make_local(env, 1657 Annotations::make_java_array(m->annotation_default(), THREAD)); 1658 JVM_END 1659 1660 1661 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1662 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1663 1664 // method is a handle to a java.lang.reflect.Method object 1665 Method* m = jvm_get_method_common(method); 1666 if (m == NULL) { 1667 return NULL; 1668 } 1669 1670 return (jbyteArray) JNIHandles::make_local(env, 1671 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1672 JVM_END 1673 1674 /* Type use annotations support (JDK 1.8) */ 1675 1676 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1677 assert (cls != NULL, "illegal class"); 1678 JVMWrapper("JVM_GetClassTypeAnnotations"); 1679 ResourceMark rm(THREAD); 1680 // Return null for arrays and primitives 1681 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1682 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1683 if (k->oop_is_instance()) { 1684 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1685 if (type_annotations != NULL) { 1686 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1687 return (jbyteArray) JNIHandles::make_local(env, a); 1688 } 1689 } 1690 } 1691 return NULL; 1692 JVM_END 1693 1694 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1695 assert (method != NULL, "illegal method"); 1696 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1697 1698 // method is a handle to a java.lang.reflect.Method object 1699 Method* m = jvm_get_method_common(method); 1700 if (m == NULL) { 1701 return NULL; 1702 } 1703 1704 AnnotationArray* type_annotations = m->type_annotations(); 1705 if (type_annotations != NULL) { 1706 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1707 return (jbyteArray) JNIHandles::make_local(env, a); 1708 } 1709 1710 return NULL; 1711 JVM_END 1712 1713 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1714 assert (field != NULL, "illegal field"); 1715 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1716 1717 fieldDescriptor fd; 1718 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1719 if (!gotFd) { 1720 return NULL; 1721 } 1722 1723 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1724 JVM_END 1725 1726 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1727 if (!cp->is_within_bounds(index)) { 1728 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1729 } 1730 } 1731 1732 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1733 { 1734 JVMWrapper("JVM_GetMethodParameters"); 1735 // method is a handle to a java.lang.reflect.Method object 1736 Method* method_ptr = jvm_get_method_common(method); 1737 methodHandle mh (THREAD, method_ptr); 1738 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1739 const int num_params = mh->method_parameters_length(); 1740 1741 if (0 != num_params) { 1742 // make sure all the symbols are properly formatted 1743 for (int i = 0; i < num_params; i++) { 1744 MethodParametersElement* params = mh->method_parameters_start(); 1745 int index = params[i].name_cp_index; 1746 bounds_check(mh->constants(), index, CHECK_NULL); 1747 1748 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1749 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1750 "Wrong type at constant pool index"); 1751 } 1752 1753 } 1754 1755 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1756 objArrayHandle result (THREAD, result_oop); 1757 1758 for (int i = 0; i < num_params; i++) { 1759 MethodParametersElement* params = mh->method_parameters_start(); 1760 // For a 0 index, give a NULL symbol 1761 Symbol* sym = 0 != params[i].name_cp_index ? 1762 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1763 int flags = params[i].flags; 1764 oop param = Reflection::new_parameter(reflected_method, i, sym, 1765 flags, CHECK_NULL); 1766 result->obj_at_put(i, param); 1767 } 1768 return (jobjectArray)JNIHandles::make_local(env, result()); 1769 } else { 1770 return (jobjectArray)NULL; 1771 } 1772 } 1773 JVM_END 1774 1775 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1776 1777 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1778 { 1779 JVMWrapper("JVM_GetClassDeclaredFields"); 1780 JvmtiVMObjectAllocEventCollector oam; 1781 1782 // Exclude primitive types and array types 1783 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1784 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1785 // Return empty array 1786 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1787 return (jobjectArray) JNIHandles::make_local(env, res); 1788 } 1789 1790 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1791 constantPoolHandle cp(THREAD, k->constants()); 1792 1793 // Ensure class is linked 1794 k->link_class(CHECK_NULL); 1795 1796 // 4496456 We need to filter out java.lang.Throwable.backtrace 1797 bool skip_backtrace = false; 1798 1799 // Allocate result 1800 int num_fields; 1801 1802 if (publicOnly) { 1803 num_fields = 0; 1804 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1805 if (fs.access_flags().is_public()) ++num_fields; 1806 } 1807 } else { 1808 num_fields = k->java_fields_count(); 1809 1810 if (k() == SystemDictionary::Throwable_klass()) { 1811 num_fields--; 1812 skip_backtrace = true; 1813 } 1814 } 1815 1816 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1817 objArrayHandle result (THREAD, r); 1818 1819 int out_idx = 0; 1820 fieldDescriptor fd; 1821 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1822 if (skip_backtrace) { 1823 // 4496456 skip java.lang.Throwable.backtrace 1824 int offset = fs.offset(); 1825 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1826 } 1827 1828 if (!publicOnly || fs.access_flags().is_public()) { 1829 fd.reinitialize(k(), fs.index()); 1830 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1831 result->obj_at_put(out_idx, field); 1832 ++out_idx; 1833 } 1834 } 1835 assert(out_idx == num_fields, "just checking"); 1836 return (jobjectArray) JNIHandles::make_local(env, result()); 1837 } 1838 JVM_END 1839 1840 static bool select_method(methodHandle method, bool want_constructor) { 1841 if (want_constructor) { 1842 return (method->is_initializer() && !method->is_static()); 1843 } else { 1844 return (!method->is_initializer() && !method->is_overpass()); 1845 } 1846 } 1847 1848 static jobjectArray get_class_declared_methods_helper( 1849 JNIEnv *env, 1850 jclass ofClass, jboolean publicOnly, 1851 bool want_constructor, 1852 Klass* klass, TRAPS) { 1853 1854 JvmtiVMObjectAllocEventCollector oam; 1855 1856 // Exclude primitive types and array types 1857 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1858 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1859 // Return empty array 1860 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1861 return (jobjectArray) JNIHandles::make_local(env, res); 1862 } 1863 1864 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1865 1866 // Ensure class is linked 1867 k->link_class(CHECK_NULL); 1868 1869 Array<Method*>* methods = k->methods(); 1870 int methods_length = methods->length(); 1871 1872 // Save original method_idnum in case of redefinition, which can change 1873 // the idnum of obsolete methods. The new method will have the same idnum 1874 // but if we refresh the methods array, the counts will be wrong. 1875 ResourceMark rm(THREAD); 1876 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1877 int num_methods = 0; 1878 1879 for (int i = 0; i < methods_length; i++) { 1880 methodHandle method(THREAD, methods->at(i)); 1881 if (select_method(method, want_constructor)) { 1882 if (!publicOnly || method->is_public()) { 1883 idnums->push(method->method_idnum()); 1884 ++num_methods; 1885 } 1886 } 1887 } 1888 1889 // Allocate result 1890 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1891 objArrayHandle result (THREAD, r); 1892 1893 // Now just put the methods that we selected above, but go by their idnum 1894 // in case of redefinition. The methods can be redefined at any safepoint, 1895 // so above when allocating the oop array and below when creating reflect 1896 // objects. 1897 for (int i = 0; i < num_methods; i++) { 1898 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1899 if (method.is_null()) { 1900 // Method may have been deleted and seems this API can handle null 1901 // Otherwise should probably put a method that throws NSME 1902 result->obj_at_put(i, NULL); 1903 } else { 1904 oop m; 1905 if (want_constructor) { 1906 m = Reflection::new_constructor(method, CHECK_NULL); 1907 } else { 1908 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1909 } 1910 result->obj_at_put(i, m); 1911 } 1912 } 1913 1914 return (jobjectArray) JNIHandles::make_local(env, result()); 1915 } 1916 1917 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1918 { 1919 JVMWrapper("JVM_GetClassDeclaredMethods"); 1920 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1921 /*want_constructor*/ false, 1922 SystemDictionary::reflect_Method_klass(), THREAD); 1923 } 1924 JVM_END 1925 1926 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1927 { 1928 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1929 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1930 /*want_constructor*/ true, 1931 SystemDictionary::reflect_Constructor_klass(), THREAD); 1932 } 1933 JVM_END 1934 1935 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1936 { 1937 JVMWrapper("JVM_GetClassAccessFlags"); 1938 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1939 // Primitive type 1940 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1941 } 1942 1943 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1944 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1945 } 1946 JVM_END 1947 1948 1949 // Constant pool access ////////////////////////////////////////////////////////// 1950 1951 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1952 { 1953 JVMWrapper("JVM_GetClassConstantPool"); 1954 JvmtiVMObjectAllocEventCollector oam; 1955 1956 // Return null for primitives and arrays 1957 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1958 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1959 if (k->oop_is_instance()) { 1960 instanceKlassHandle k_h(THREAD, k); 1961 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1962 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1963 return JNIHandles::make_local(jcp()); 1964 } 1965 } 1966 return NULL; 1967 } 1968 JVM_END 1969 1970 1971 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1972 { 1973 JVMWrapper("JVM_ConstantPoolGetSize"); 1974 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1975 return cp->length(); 1976 } 1977 JVM_END 1978 1979 1980 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1981 { 1982 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1983 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1984 bounds_check(cp, index, CHECK_NULL); 1985 constantTag tag = cp->tag_at(index); 1986 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1987 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1988 } 1989 Klass* k = cp->klass_at(index, CHECK_NULL); 1990 return (jclass) JNIHandles::make_local(k->java_mirror()); 1991 } 1992 JVM_END 1993 1994 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1995 { 1996 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1997 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1998 bounds_check(cp, index, CHECK_NULL); 1999 constantTag tag = cp->tag_at(index); 2000 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2002 } 2003 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2004 if (k == NULL) return NULL; 2005 return (jclass) JNIHandles::make_local(k->java_mirror()); 2006 } 2007 JVM_END 2008 2009 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2010 constantTag tag = cp->tag_at(index); 2011 if (!tag.is_method() && !tag.is_interface_method()) { 2012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2013 } 2014 int klass_ref = cp->uncached_klass_ref_index_at(index); 2015 Klass* k_o; 2016 if (force_resolution) { 2017 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2018 } else { 2019 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2020 if (k_o == NULL) return NULL; 2021 } 2022 instanceKlassHandle k(THREAD, k_o); 2023 Symbol* name = cp->uncached_name_ref_at(index); 2024 Symbol* sig = cp->uncached_signature_ref_at(index); 2025 methodHandle m (THREAD, k->find_method(name, sig)); 2026 if (m.is_null()) { 2027 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2028 } 2029 oop method; 2030 if (!m->is_initializer() || m->is_static()) { 2031 method = Reflection::new_method(m, true, true, CHECK_NULL); 2032 } else { 2033 method = Reflection::new_constructor(m, CHECK_NULL); 2034 } 2035 return JNIHandles::make_local(method); 2036 } 2037 2038 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2039 { 2040 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2041 JvmtiVMObjectAllocEventCollector oam; 2042 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2043 bounds_check(cp, index, CHECK_NULL); 2044 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2045 return res; 2046 } 2047 JVM_END 2048 2049 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2050 { 2051 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2052 JvmtiVMObjectAllocEventCollector oam; 2053 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2054 bounds_check(cp, index, CHECK_NULL); 2055 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2056 return res; 2057 } 2058 JVM_END 2059 2060 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2061 constantTag tag = cp->tag_at(index); 2062 if (!tag.is_field()) { 2063 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2064 } 2065 int klass_ref = cp->uncached_klass_ref_index_at(index); 2066 Klass* k_o; 2067 if (force_resolution) { 2068 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2069 } else { 2070 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2071 if (k_o == NULL) return NULL; 2072 } 2073 instanceKlassHandle k(THREAD, k_o); 2074 Symbol* name = cp->uncached_name_ref_at(index); 2075 Symbol* sig = cp->uncached_signature_ref_at(index); 2076 fieldDescriptor fd; 2077 Klass* target_klass = k->find_field(name, sig, &fd); 2078 if (target_klass == NULL) { 2079 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2080 } 2081 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2082 return JNIHandles::make_local(field); 2083 } 2084 2085 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2086 { 2087 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2088 JvmtiVMObjectAllocEventCollector oam; 2089 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2090 bounds_check(cp, index, CHECK_NULL); 2091 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2092 return res; 2093 } 2094 JVM_END 2095 2096 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2097 { 2098 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2099 JvmtiVMObjectAllocEventCollector oam; 2100 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2101 bounds_check(cp, index, CHECK_NULL); 2102 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2103 return res; 2104 } 2105 JVM_END 2106 2107 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2108 { 2109 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2110 JvmtiVMObjectAllocEventCollector oam; 2111 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2112 bounds_check(cp, index, CHECK_NULL); 2113 constantTag tag = cp->tag_at(index); 2114 if (!tag.is_field_or_method()) { 2115 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2116 } 2117 int klass_ref = cp->uncached_klass_ref_index_at(index); 2118 Symbol* klass_name = cp->klass_name_at(klass_ref); 2119 Symbol* member_name = cp->uncached_name_ref_at(index); 2120 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2121 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2122 objArrayHandle dest(THREAD, dest_o); 2123 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2124 dest->obj_at_put(0, str()); 2125 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2126 dest->obj_at_put(1, str()); 2127 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2128 dest->obj_at_put(2, str()); 2129 return (jobjectArray) JNIHandles::make_local(dest()); 2130 } 2131 JVM_END 2132 2133 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2134 { 2135 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2137 bounds_check(cp, index, CHECK_0); 2138 constantTag tag = cp->tag_at(index); 2139 if (!tag.is_int()) { 2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2141 } 2142 return cp->int_at(index); 2143 } 2144 JVM_END 2145 2146 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2147 { 2148 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2149 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2150 bounds_check(cp, index, CHECK_(0L)); 2151 constantTag tag = cp->tag_at(index); 2152 if (!tag.is_long()) { 2153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2154 } 2155 return cp->long_at(index); 2156 } 2157 JVM_END 2158 2159 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2160 { 2161 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2162 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2163 bounds_check(cp, index, CHECK_(0.0f)); 2164 constantTag tag = cp->tag_at(index); 2165 if (!tag.is_float()) { 2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2167 } 2168 return cp->float_at(index); 2169 } 2170 JVM_END 2171 2172 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2173 { 2174 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2175 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2176 bounds_check(cp, index, CHECK_(0.0)); 2177 constantTag tag = cp->tag_at(index); 2178 if (!tag.is_double()) { 2179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2180 } 2181 return cp->double_at(index); 2182 } 2183 JVM_END 2184 2185 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2186 { 2187 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2188 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2189 bounds_check(cp, index, CHECK_NULL); 2190 constantTag tag = cp->tag_at(index); 2191 if (!tag.is_string()) { 2192 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2193 } 2194 oop str = cp->string_at(index, CHECK_NULL); 2195 return (jstring) JNIHandles::make_local(str); 2196 } 2197 JVM_END 2198 2199 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2200 { 2201 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2202 JvmtiVMObjectAllocEventCollector oam; 2203 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2204 bounds_check(cp, index, CHECK_NULL); 2205 constantTag tag = cp->tag_at(index); 2206 if (!tag.is_symbol()) { 2207 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2208 } 2209 Symbol* sym = cp->symbol_at(index); 2210 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2211 return (jstring) JNIHandles::make_local(str()); 2212 } 2213 JVM_END 2214 2215 2216 // Assertion support. ////////////////////////////////////////////////////////// 2217 2218 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2219 JVMWrapper("JVM_DesiredAssertionStatus"); 2220 assert(cls != NULL, "bad class"); 2221 2222 oop r = JNIHandles::resolve(cls); 2223 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2224 if (java_lang_Class::is_primitive(r)) return false; 2225 2226 Klass* k = java_lang_Class::as_Klass(r); 2227 assert(k->oop_is_instance(), "must be an instance klass"); 2228 if (! k->oop_is_instance()) return false; 2229 2230 ResourceMark rm(THREAD); 2231 const char* name = k->name()->as_C_string(); 2232 bool system_class = k->class_loader() == NULL; 2233 return JavaAssertions::enabled(name, system_class); 2234 2235 JVM_END 2236 2237 2238 // Return a new AssertionStatusDirectives object with the fields filled in with 2239 // command-line assertion arguments (i.e., -ea, -da). 2240 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2241 JVMWrapper("JVM_AssertionStatusDirectives"); 2242 JvmtiVMObjectAllocEventCollector oam; 2243 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2244 return JNIHandles::make_local(env, asd); 2245 JVM_END 2246 2247 // Verification //////////////////////////////////////////////////////////////////////////////// 2248 2249 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2250 2251 // RedefineClasses support: bug 6214132 caused verification to fail. 2252 // All functions from this section should call the jvmtiThreadSate function: 2253 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2254 // The function returns a Klass* of the _scratch_class if the verifier 2255 // was invoked in the middle of the class redefinition. 2256 // Otherwise it returns its argument value which is the _the_class Klass*. 2257 // Please, refer to the description in the jvmtiThreadSate.hpp. 2258 2259 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2260 JVMWrapper("JVM_GetClassNameUTF"); 2261 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2262 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2263 return k->name()->as_utf8(); 2264 JVM_END 2265 2266 2267 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2268 JVMWrapper("JVM_GetClassCPTypes"); 2269 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2270 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2271 // types will have length zero if this is not an InstanceKlass 2272 // (length is determined by call to JVM_GetClassCPEntriesCount) 2273 if (k->oop_is_instance()) { 2274 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2275 for (int index = cp->length() - 1; index >= 0; index--) { 2276 constantTag tag = cp->tag_at(index); 2277 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2278 } 2279 } 2280 JVM_END 2281 2282 2283 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2284 JVMWrapper("JVM_GetClassCPEntriesCount"); 2285 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2287 if (!k->oop_is_instance()) 2288 return 0; 2289 return InstanceKlass::cast(k)->constants()->length(); 2290 JVM_END 2291 2292 2293 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2294 JVMWrapper("JVM_GetClassFieldsCount"); 2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2297 if (!k->oop_is_instance()) 2298 return 0; 2299 return InstanceKlass::cast(k)->java_fields_count(); 2300 JVM_END 2301 2302 2303 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2304 JVMWrapper("JVM_GetClassMethodsCount"); 2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2307 if (!k->oop_is_instance()) 2308 return 0; 2309 return InstanceKlass::cast(k)->methods()->length(); 2310 JVM_END 2311 2312 2313 // The following methods, used for the verifier, are never called with 2314 // array klasses, so a direct cast to InstanceKlass is safe. 2315 // Typically, these methods are called in a loop with bounds determined 2316 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2317 // zero for arrays. 2318 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2319 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2320 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2322 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2323 int length = method->checked_exceptions_length(); 2324 if (length > 0) { 2325 CheckedExceptionElement* table= method->checked_exceptions_start(); 2326 for (int i = 0; i < length; i++) { 2327 exceptions[i] = table[i].class_cp_index; 2328 } 2329 } 2330 JVM_END 2331 2332 2333 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2334 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2337 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2338 return method->checked_exceptions_length(); 2339 JVM_END 2340 2341 2342 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2343 JVMWrapper("JVM_GetMethodIxByteCode"); 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 memcpy(code, method->code_base(), method->code_size()); 2348 JVM_END 2349 2350 2351 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2352 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 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 return method->code_size(); 2357 JVM_END 2358 2359 2360 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2361 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 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 ExceptionTable extable(method); 2366 entry->start_pc = extable.start_pc(entry_index); 2367 entry->end_pc = extable.end_pc(entry_index); 2368 entry->handler_pc = extable.handler_pc(entry_index); 2369 entry->catchType = extable.catch_type_index(entry_index); 2370 JVM_END 2371 2372 2373 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2374 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2375 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2376 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2377 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2378 return method->exception_table_length(); 2379 JVM_END 2380 2381 2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2383 JVMWrapper("JVM_GetMethodIxModifiers"); 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->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2388 JVM_END 2389 2390 2391 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2392 JVMWrapper("JVM_GetFieldIxModifiers"); 2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2395 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2396 JVM_END 2397 2398 2399 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2400 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2401 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2402 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2403 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2404 return method->max_locals(); 2405 JVM_END 2406 2407 2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2409 JVMWrapper("JVM_GetMethodIxArgsSize"); 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->size_of_parameters(); 2414 JVM_END 2415 2416 2417 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2418 JVMWrapper("JVM_GetMethodIxMaxStack"); 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->verifier_max_stack(); 2423 JVM_END 2424 2425 2426 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2427 JVMWrapper("JVM_IsConstructorIx"); 2428 ResourceMark rm(THREAD); 2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2431 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2432 return method->name() == vmSymbols::object_initializer_name(); 2433 JVM_END 2434 2435 2436 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2437 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2438 ResourceMark rm(THREAD); 2439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2441 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2442 return method->is_overpass(); 2443 JVM_END 2444 2445 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2446 JVMWrapper("JVM_GetMethodIxIxUTF"); 2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2450 return method->name()->as_utf8(); 2451 JVM_END 2452 2453 2454 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2455 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 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->signature()->as_utf8(); 2460 JVM_END 2461 2462 /** 2463 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2464 * read entries in the constant pool. Since the old verifier always 2465 * works on a copy of the code, it will not see any rewriting that 2466 * may possibly occur in the middle of verification. So it is important 2467 * that nothing it calls tries to use the cpCache instead of the raw 2468 * constant pool, so we must use cp->uncached_x methods when appropriate. 2469 */ 2470 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2471 JVMWrapper("JVM_GetCPFieldNameUTF"); 2472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2473 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2474 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2475 switch (cp->tag_at(cp_index).value()) { 2476 case JVM_CONSTANT_Fieldref: 2477 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2478 default: 2479 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2480 } 2481 ShouldNotReachHere(); 2482 return NULL; 2483 JVM_END 2484 2485 2486 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2487 JVMWrapper("JVM_GetCPMethodNameUTF"); 2488 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2489 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2490 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2491 switch (cp->tag_at(cp_index).value()) { 2492 case JVM_CONSTANT_InterfaceMethodref: 2493 case JVM_CONSTANT_Methodref: 2494 case JVM_CONSTANT_NameAndType: // for invokedynamic 2495 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2496 default: 2497 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2498 } 2499 ShouldNotReachHere(); 2500 return NULL; 2501 JVM_END 2502 2503 2504 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2505 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2508 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2509 switch (cp->tag_at(cp_index).value()) { 2510 case JVM_CONSTANT_InterfaceMethodref: 2511 case JVM_CONSTANT_Methodref: 2512 case JVM_CONSTANT_NameAndType: // for invokedynamic 2513 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2514 default: 2515 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2516 } 2517 ShouldNotReachHere(); 2518 return NULL; 2519 JVM_END 2520 2521 2522 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2523 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2526 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2527 switch (cp->tag_at(cp_index).value()) { 2528 case JVM_CONSTANT_Fieldref: 2529 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2530 default: 2531 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2532 } 2533 ShouldNotReachHere(); 2534 return NULL; 2535 JVM_END 2536 2537 2538 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2539 JVMWrapper("JVM_GetCPClassNameUTF"); 2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2542 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2543 Symbol* classname = cp->klass_name_at(cp_index); 2544 return classname->as_utf8(); 2545 JVM_END 2546 2547 2548 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2549 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2551 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2552 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2553 switch (cp->tag_at(cp_index).value()) { 2554 case JVM_CONSTANT_Fieldref: { 2555 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2556 Symbol* classname = cp->klass_name_at(class_index); 2557 return classname->as_utf8(); 2558 } 2559 default: 2560 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2561 } 2562 ShouldNotReachHere(); 2563 return NULL; 2564 JVM_END 2565 2566 2567 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2568 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2569 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2570 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2571 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2572 switch (cp->tag_at(cp_index).value()) { 2573 case JVM_CONSTANT_Methodref: 2574 case JVM_CONSTANT_InterfaceMethodref: { 2575 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2576 Symbol* classname = cp->klass_name_at(class_index); 2577 return classname->as_utf8(); 2578 } 2579 default: 2580 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2581 } 2582 ShouldNotReachHere(); 2583 return NULL; 2584 JVM_END 2585 2586 2587 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2588 JVMWrapper("JVM_GetCPFieldModifiers"); 2589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2590 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2591 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2592 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2593 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2594 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2595 switch (cp->tag_at(cp_index).value()) { 2596 case JVM_CONSTANT_Fieldref: { 2597 Symbol* name = cp->uncached_name_ref_at(cp_index); 2598 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2599 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2600 if (fs.name() == name && fs.signature() == signature) { 2601 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2602 } 2603 } 2604 return -1; 2605 } 2606 default: 2607 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2608 } 2609 ShouldNotReachHere(); 2610 return 0; 2611 JVM_END 2612 2613 2614 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2615 JVMWrapper("JVM_GetCPMethodModifiers"); 2616 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2617 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2619 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2620 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2621 switch (cp->tag_at(cp_index).value()) { 2622 case JVM_CONSTANT_Methodref: 2623 case JVM_CONSTANT_InterfaceMethodref: { 2624 Symbol* name = cp->uncached_name_ref_at(cp_index); 2625 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2626 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2627 int methods_count = methods->length(); 2628 for (int i = 0; i < methods_count; i++) { 2629 Method* method = methods->at(i); 2630 if (method->name() == name && method->signature() == signature) { 2631 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2632 } 2633 } 2634 return -1; 2635 } 2636 default: 2637 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2638 } 2639 ShouldNotReachHere(); 2640 return 0; 2641 JVM_END 2642 2643 2644 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2645 2646 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2647 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2648 JVM_END 2649 2650 2651 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2652 JVMWrapper("JVM_IsSameClassPackage"); 2653 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2654 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2655 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2656 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2657 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2658 JVM_END 2659 2660 2661 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2662 2663 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2664 JVMWrapper2("JVM_Open (%s)", fname); 2665 2666 //%note jvm_r6 2667 int result = os::open(fname, flags, mode); 2668 if (result >= 0) { 2669 return result; 2670 } else { 2671 switch(errno) { 2672 case EEXIST: 2673 return JVM_EEXIST; 2674 default: 2675 return -1; 2676 } 2677 } 2678 JVM_END 2679 2680 2681 JVM_LEAF(jint, JVM_Close(jint fd)) 2682 JVMWrapper2("JVM_Close (0x%x)", fd); 2683 //%note jvm_r6 2684 return os::close(fd); 2685 JVM_END 2686 2687 2688 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2689 JVMWrapper2("JVM_Read (0x%x)", fd); 2690 2691 //%note jvm_r6 2692 return (jint)os::restartable_read(fd, buf, nbytes); 2693 JVM_END 2694 2695 2696 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2697 JVMWrapper2("JVM_Write (0x%x)", fd); 2698 2699 //%note jvm_r6 2700 return (jint)os::write(fd, buf, nbytes); 2701 JVM_END 2702 2703 2704 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2705 JVMWrapper2("JVM_Available (0x%x)", fd); 2706 //%note jvm_r6 2707 return os::available(fd, pbytes); 2708 JVM_END 2709 2710 2711 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2712 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2713 //%note jvm_r6 2714 return os::lseek(fd, offset, whence); 2715 JVM_END 2716 2717 2718 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2719 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2720 return os::ftruncate(fd, length); 2721 JVM_END 2722 2723 2724 JVM_LEAF(jint, JVM_Sync(jint fd)) 2725 JVMWrapper2("JVM_Sync (0x%x)", fd); 2726 //%note jvm_r6 2727 return os::fsync(fd); 2728 JVM_END 2729 2730 2731 // Printing support ////////////////////////////////////////////////// 2732 extern "C" { 2733 2734 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2735 // see bug 4399518, 4417214 2736 if ((intptr_t)count <= 0) return -1; 2737 return vsnprintf(str, count, fmt, args); 2738 } 2739 2740 2741 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2742 va_list args; 2743 int len; 2744 va_start(args, fmt); 2745 len = jio_vsnprintf(str, count, fmt, args); 2746 va_end(args); 2747 return len; 2748 } 2749 2750 2751 int jio_fprintf(FILE* f, const char *fmt, ...) { 2752 int len; 2753 va_list args; 2754 va_start(args, fmt); 2755 len = jio_vfprintf(f, fmt, args); 2756 va_end(args); 2757 return len; 2758 } 2759 2760 2761 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2762 if (Arguments::vfprintf_hook() != NULL) { 2763 return Arguments::vfprintf_hook()(f, fmt, args); 2764 } else { 2765 return vfprintf(f, fmt, args); 2766 } 2767 } 2768 2769 2770 JNIEXPORT int jio_printf(const char *fmt, ...) { 2771 int len; 2772 va_list args; 2773 va_start(args, fmt); 2774 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2775 va_end(args); 2776 return len; 2777 } 2778 2779 2780 // HotSpot specific jio method 2781 void jio_print(const char* s) { 2782 // Try to make this function as atomic as possible. 2783 if (Arguments::vfprintf_hook() != NULL) { 2784 jio_fprintf(defaultStream::output_stream(), "%s", s); 2785 } else { 2786 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2787 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2788 } 2789 } 2790 2791 } // Extern C 2792 2793 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2794 2795 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2796 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2797 // OSThread objects. The exception to this rule is when the target object is the thread 2798 // doing the operation, in which case we know that the thread won't exit until the 2799 // operation is done (all exits being voluntary). There are a few cases where it is 2800 // rather silly to do operations on yourself, like resuming yourself or asking whether 2801 // you are alive. While these can still happen, they are not subject to deadlocks if 2802 // the lock is held while the operation occurs (this is not the case for suspend, for 2803 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2804 // implementation is local to this file, we always lock Threads_lock for that one. 2805 2806 static void thread_entry(JavaThread* thread, TRAPS) { 2807 HandleMark hm(THREAD); 2808 Handle obj(THREAD, thread->threadObj()); 2809 JavaValue result(T_VOID); 2810 JavaCalls::call_virtual(&result, 2811 obj, 2812 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2813 vmSymbols::run_method_name(), 2814 vmSymbols::void_method_signature(), 2815 THREAD); 2816 } 2817 2818 2819 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2820 JVMWrapper("JVM_StartThread"); 2821 JavaThread *native_thread = NULL; 2822 2823 // We cannot hold the Threads_lock when we throw an exception, 2824 // due to rank ordering issues. Example: we might need to grab the 2825 // Heap_lock while we construct the exception. 2826 bool throw_illegal_thread_state = false; 2827 2828 // We must release the Threads_lock before we can post a jvmti event 2829 // in Thread::start. 2830 { 2831 // Ensure that the C++ Thread and OSThread structures aren't freed before 2832 // we operate. 2833 MutexLocker mu(Threads_lock); 2834 2835 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2836 // re-starting an already started thread, so we should usually find 2837 // that the JavaThread is null. However for a JNI attached thread 2838 // there is a small window between the Thread object being created 2839 // (with its JavaThread set) and the update to its threadStatus, so we 2840 // have to check for this 2841 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2842 throw_illegal_thread_state = true; 2843 } else { 2844 // We could also check the stillborn flag to see if this thread was already stopped, but 2845 // for historical reasons we let the thread detect that itself when it starts running 2846 2847 jlong size = 2848 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2849 // Allocate the C++ Thread structure and create the native thread. The 2850 // stack size retrieved from java is signed, but the constructor takes 2851 // size_t (an unsigned type), so avoid passing negative values which would 2852 // result in really large stacks. 2853 size_t sz = size > 0 ? (size_t) size : 0; 2854 native_thread = new JavaThread(&thread_entry, sz); 2855 2856 // At this point it may be possible that no osthread was created for the 2857 // JavaThread due to lack of memory. Check for this situation and throw 2858 // an exception if necessary. Eventually we may want to change this so 2859 // that we only grab the lock if the thread was created successfully - 2860 // then we can also do this check and throw the exception in the 2861 // JavaThread constructor. 2862 if (native_thread->osthread() != NULL) { 2863 // Note: the current thread is not being used within "prepare". 2864 native_thread->prepare(jthread); 2865 } 2866 } 2867 } 2868 2869 if (throw_illegal_thread_state) { 2870 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2871 } 2872 2873 assert(native_thread != NULL, "Starting null thread?"); 2874 2875 if (native_thread->osthread() == NULL) { 2876 // No one should hold a reference to the 'native_thread'. 2877 delete native_thread; 2878 if (JvmtiExport::should_post_resource_exhausted()) { 2879 JvmtiExport::post_resource_exhausted( 2880 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2881 os::native_thread_creation_failed_msg()); 2882 } 2883 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2884 os::native_thread_creation_failed_msg()); 2885 } 2886 2887 Thread::start(native_thread); 2888 2889 JVM_END 2890 2891 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2892 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2893 // but is thought to be reliable and simple. In the case, where the receiver is the 2894 // same thread as the sender, no safepoint is needed. 2895 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2896 JVMWrapper("JVM_StopThread"); 2897 2898 oop java_throwable = JNIHandles::resolve(throwable); 2899 if (java_throwable == NULL) { 2900 THROW(vmSymbols::java_lang_NullPointerException()); 2901 } 2902 oop java_thread = JNIHandles::resolve_non_null(jthread); 2903 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2904 Events::log_exception(JavaThread::current(), 2905 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2906 receiver, (address)java_thread, throwable); 2907 // First check if thread is alive 2908 if (receiver != NULL) { 2909 // Check if exception is getting thrown at self (use oop equality, since the 2910 // target object might exit) 2911 if (java_thread == thread->threadObj()) { 2912 THROW_OOP(java_throwable); 2913 } else { 2914 // Enques a VM_Operation to stop all threads and then deliver the exception... 2915 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2916 } 2917 } 2918 else { 2919 // Either: 2920 // - target thread has not been started before being stopped, or 2921 // - target thread already terminated 2922 // We could read the threadStatus to determine which case it is 2923 // but that is overkill as it doesn't matter. We must set the 2924 // stillborn flag for the first case, and if the thread has already 2925 // exited setting this flag has no affect 2926 java_lang_Thread::set_stillborn(java_thread); 2927 } 2928 JVM_END 2929 2930 2931 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2932 JVMWrapper("JVM_IsThreadAlive"); 2933 2934 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2935 return java_lang_Thread::is_alive(thread_oop); 2936 JVM_END 2937 2938 2939 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2940 JVMWrapper("JVM_SuspendThread"); 2941 oop java_thread = JNIHandles::resolve_non_null(jthread); 2942 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2943 2944 if (receiver != NULL) { 2945 // thread has run and has not exited (still on threads list) 2946 2947 { 2948 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2949 if (receiver->is_external_suspend()) { 2950 // Don't allow nested external suspend requests. We can't return 2951 // an error from this interface so just ignore the problem. 2952 return; 2953 } 2954 if (receiver->is_exiting()) { // thread is in the process of exiting 2955 return; 2956 } 2957 receiver->set_external_suspend(); 2958 } 2959 2960 // java_suspend() will catch threads in the process of exiting 2961 // and will ignore them. 2962 receiver->java_suspend(); 2963 2964 // It would be nice to have the following assertion in all the 2965 // time, but it is possible for a racing resume request to have 2966 // resumed this thread right after we suspended it. Temporarily 2967 // enable this assertion if you are chasing a different kind of 2968 // bug. 2969 // 2970 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2971 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2972 } 2973 JVM_END 2974 2975 2976 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2977 JVMWrapper("JVM_ResumeThread"); 2978 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2979 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2980 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2981 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2982 // looks at it. 2983 MutexLocker ml(Threads_lock); 2984 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2985 if (thr != NULL) { 2986 // the thread has run and is not in the process of exiting 2987 thr->java_resume(); 2988 } 2989 JVM_END 2990 2991 2992 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2993 JVMWrapper("JVM_SetThreadPriority"); 2994 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2995 MutexLocker ml(Threads_lock); 2996 oop java_thread = JNIHandles::resolve_non_null(jthread); 2997 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2998 JavaThread* thr = java_lang_Thread::thread(java_thread); 2999 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 3000 Thread::set_priority(thr, (ThreadPriority)prio); 3001 } 3002 JVM_END 3003 3004 3005 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 3006 JVMWrapper("JVM_Yield"); 3007 if (os::dont_yield()) return; 3008 HOTSPOT_THREAD_YIELD(); 3009 3010 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3011 // Critical for similar threading behaviour 3012 if (ConvertYieldToSleep) { 3013 os::sleep(thread, MinSleepInterval, false); 3014 } else { 3015 os::yield(); 3016 } 3017 JVM_END 3018 3019 3020 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3021 JVMWrapper("JVM_Sleep"); 3022 3023 if (millis < 0) { 3024 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3025 } 3026 3027 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3028 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3029 } 3030 3031 // Save current thread state and restore it at the end of this block. 3032 // And set new thread state to SLEEPING. 3033 JavaThreadSleepState jtss(thread); 3034 3035 HOTSPOT_THREAD_SLEEP_BEGIN(millis); 3036 3037 EventThreadSleep event; 3038 3039 if (millis == 0) { 3040 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3041 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3042 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3043 // for SOLARIS 3044 if (ConvertSleepToYield) { 3045 os::yield(); 3046 } else { 3047 ThreadState old_state = thread->osthread()->get_state(); 3048 thread->osthread()->set_state(SLEEPING); 3049 os::sleep(thread, MinSleepInterval, false); 3050 thread->osthread()->set_state(old_state); 3051 } 3052 } else { 3053 ThreadState old_state = thread->osthread()->get_state(); 3054 thread->osthread()->set_state(SLEEPING); 3055 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3056 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3057 // us while we were sleeping. We do not overwrite those. 3058 if (!HAS_PENDING_EXCEPTION) { 3059 if (event.should_commit()) { 3060 event.set_time(millis); 3061 event.commit(); 3062 } 3063 HOTSPOT_THREAD_SLEEP_END(1); 3064 3065 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3066 // to properly restore the thread state. That's likely wrong. 3067 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3068 } 3069 } 3070 thread->osthread()->set_state(old_state); 3071 } 3072 if (event.should_commit()) { 3073 event.set_time(millis); 3074 event.commit(); 3075 } 3076 HOTSPOT_THREAD_SLEEP_END(0); 3077 JVM_END 3078 3079 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3080 JVMWrapper("JVM_CurrentThread"); 3081 oop jthread = thread->threadObj(); 3082 assert (thread != NULL, "no current thread!"); 3083 return JNIHandles::make_local(env, jthread); 3084 JVM_END 3085 3086 3087 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3088 JVMWrapper("JVM_CountStackFrames"); 3089 3090 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3091 oop java_thread = JNIHandles::resolve_non_null(jthread); 3092 bool throw_illegal_thread_state = false; 3093 int count = 0; 3094 3095 { 3096 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3097 // We need to re-resolve the java_thread, since a GC might have happened during the 3098 // acquire of the lock 3099 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3100 3101 if (thr == NULL) { 3102 // do nothing 3103 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3104 // Check whether this java thread has been suspended already. If not, throws 3105 // IllegalThreadStateException. We defer to throw that exception until 3106 // Threads_lock is released since loading exception class has to leave VM. 3107 // The correct way to test a thread is actually suspended is 3108 // wait_for_ext_suspend_completion(), but we can't call that while holding 3109 // the Threads_lock. The above tests are sufficient for our purposes 3110 // provided the walkability of the stack is stable - which it isn't 3111 // 100% but close enough for most practical purposes. 3112 throw_illegal_thread_state = true; 3113 } else { 3114 // Count all java activation, i.e., number of vframes 3115 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3116 // Native frames are not counted 3117 if (!vfst.method()->is_native()) count++; 3118 } 3119 } 3120 } 3121 3122 if (throw_illegal_thread_state) { 3123 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3124 "this thread is not suspended"); 3125 } 3126 return count; 3127 JVM_END 3128 3129 // Consider: A better way to implement JVM_Interrupt() is to acquire 3130 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3131 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3132 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3133 // outside the critical section. Threads_lock is hot so we want to minimize 3134 // the hold-time. A cleaner interface would be to decompose interrupt into 3135 // two steps. The 1st phase, performed under Threads_lock, would return 3136 // a closure that'd be invoked after Threads_lock was dropped. 3137 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3138 // admit spurious wakeups. 3139 3140 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3141 JVMWrapper("JVM_Interrupt"); 3142 3143 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3144 oop java_thread = JNIHandles::resolve_non_null(jthread); 3145 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3146 // We need to re-resolve the java_thread, since a GC might have happened during the 3147 // acquire of the lock 3148 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3149 if (thr != NULL) { 3150 Thread::interrupt(thr); 3151 } 3152 JVM_END 3153 3154 3155 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3156 JVMWrapper("JVM_IsInterrupted"); 3157 3158 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3159 oop java_thread = JNIHandles::resolve_non_null(jthread); 3160 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3161 // We need to re-resolve the java_thread, since a GC might have happened during the 3162 // acquire of the lock 3163 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3164 if (thr == NULL) { 3165 return JNI_FALSE; 3166 } else { 3167 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3168 } 3169 JVM_END 3170 3171 3172 // Return true iff the current thread has locked the object passed in 3173 3174 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3175 JVMWrapper("JVM_HoldsLock"); 3176 assert(THREAD->is_Java_thread(), "sanity check"); 3177 if (obj == NULL) { 3178 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3179 } 3180 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3181 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3182 JVM_END 3183 3184 3185 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3186 JVMWrapper("JVM_DumpAllStacks"); 3187 VM_PrintThreads op; 3188 VMThread::execute(&op); 3189 if (JvmtiExport::should_post_data_dump()) { 3190 JvmtiExport::post_data_dump(); 3191 } 3192 JVM_END 3193 3194 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3195 JVMWrapper("JVM_SetNativeThreadName"); 3196 ResourceMark rm(THREAD); 3197 oop java_thread = JNIHandles::resolve_non_null(jthread); 3198 JavaThread* thr = java_lang_Thread::thread(java_thread); 3199 // Thread naming only supported for the current thread, doesn't work for 3200 // target threads. 3201 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3202 // we don't set the name of an attached thread to avoid stepping 3203 // on other programs 3204 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3205 os::set_native_thread_name(thread_name); 3206 } 3207 JVM_END 3208 3209 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3210 3211 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3212 assert(jthread->is_Java_thread(), "must be a Java thread"); 3213 if (jthread->privileged_stack_top() == NULL) return false; 3214 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3215 oop loader = jthread->privileged_stack_top()->class_loader(); 3216 if (loader == NULL) return true; 3217 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3218 if (trusted) return true; 3219 } 3220 return false; 3221 } 3222 3223 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3224 JVMWrapper("JVM_CurrentLoadedClass"); 3225 ResourceMark rm(THREAD); 3226 3227 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3228 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3229 bool trusted = is_trusted_frame(thread, &vfst); 3230 if (trusted) return NULL; 3231 3232 Method* m = vfst.method(); 3233 if (!m->is_native()) { 3234 InstanceKlass* holder = m->method_holder(); 3235 oop loader = holder->class_loader(); 3236 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3237 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3238 } 3239 } 3240 } 3241 return NULL; 3242 JVM_END 3243 3244 3245 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3246 JVMWrapper("JVM_CurrentClassLoader"); 3247 ResourceMark rm(THREAD); 3248 3249 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3250 3251 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3252 bool trusted = is_trusted_frame(thread, &vfst); 3253 if (trusted) return NULL; 3254 3255 Method* m = vfst.method(); 3256 if (!m->is_native()) { 3257 InstanceKlass* holder = m->method_holder(); 3258 assert(holder->is_klass(), "just checking"); 3259 oop loader = holder->class_loader(); 3260 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3261 return JNIHandles::make_local(env, loader); 3262 } 3263 } 3264 } 3265 return NULL; 3266 JVM_END 3267 3268 3269 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3270 JVMWrapper("JVM_GetClassContext"); 3271 ResourceMark rm(THREAD); 3272 JvmtiVMObjectAllocEventCollector oam; 3273 vframeStream vfst(thread); 3274 3275 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3276 // This must only be called from SecurityManager.getClassContext 3277 Method* m = vfst.method(); 3278 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3279 m->name() == vmSymbols::getClassContext_name() && 3280 m->signature() == vmSymbols::void_class_array_signature())) { 3281 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3282 } 3283 } 3284 3285 // Collect method holders 3286 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3287 for (; !vfst.at_end(); vfst.security_next()) { 3288 Method* m = vfst.method(); 3289 // Native frames are not returned 3290 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3291 Klass* holder = m->method_holder(); 3292 assert(holder->is_klass(), "just checking"); 3293 klass_array->append(holder); 3294 } 3295 } 3296 3297 // Create result array of type [Ljava/lang/Class; 3298 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3299 // Fill in mirrors corresponding to method holders 3300 for (int i = 0; i < klass_array->length(); i++) { 3301 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3302 } 3303 3304 return (jobjectArray) JNIHandles::make_local(env, result); 3305 JVM_END 3306 3307 3308 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3309 JVMWrapper("JVM_ClassDepth"); 3310 ResourceMark rm(THREAD); 3311 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3312 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3313 3314 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3315 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3316 if (class_name_sym == NULL) { 3317 return -1; 3318 } 3319 3320 int depth = 0; 3321 3322 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3323 if (!vfst.method()->is_native()) { 3324 InstanceKlass* holder = vfst.method()->method_holder(); 3325 assert(holder->is_klass(), "just checking"); 3326 if (holder->name() == class_name_sym) { 3327 return depth; 3328 } 3329 depth++; 3330 } 3331 } 3332 return -1; 3333 JVM_END 3334 3335 3336 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3337 JVMWrapper("JVM_ClassLoaderDepth"); 3338 ResourceMark rm(THREAD); 3339 int depth = 0; 3340 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3341 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3342 bool trusted = is_trusted_frame(thread, &vfst); 3343 if (trusted) return -1; 3344 3345 Method* m = vfst.method(); 3346 if (!m->is_native()) { 3347 InstanceKlass* holder = m->method_holder(); 3348 assert(holder->is_klass(), "just checking"); 3349 oop loader = holder->class_loader(); 3350 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3351 return depth; 3352 } 3353 depth++; 3354 } 3355 } 3356 return -1; 3357 JVM_END 3358 3359 3360 // java.lang.Package //////////////////////////////////////////////////////////////// 3361 3362 3363 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3364 JVMWrapper("JVM_GetSystemPackage"); 3365 ResourceMark rm(THREAD); 3366 JvmtiVMObjectAllocEventCollector oam; 3367 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3368 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3369 return (jstring) JNIHandles::make_local(result); 3370 JVM_END 3371 3372 3373 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3374 JVMWrapper("JVM_GetSystemPackages"); 3375 JvmtiVMObjectAllocEventCollector oam; 3376 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3377 return (jobjectArray) JNIHandles::make_local(result); 3378 JVM_END 3379 3380 3381 // ObjectInputStream /////////////////////////////////////////////////////////////// 3382 3383 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3384 if (current_class == NULL) { 3385 return true; 3386 } 3387 if ((current_class == field_class) || access.is_public()) { 3388 return true; 3389 } 3390 3391 if (access.is_protected()) { 3392 // See if current_class is a subclass of field_class 3393 if (current_class->is_subclass_of(field_class)) { 3394 return true; 3395 } 3396 } 3397 3398 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3399 } 3400 3401 3402 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3403 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3404 JVMWrapper("JVM_AllocateNewObject"); 3405 JvmtiVMObjectAllocEventCollector oam; 3406 // Receiver is not used 3407 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3408 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3409 3410 // Cannot instantiate primitive types 3411 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3412 ResourceMark rm(THREAD); 3413 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3414 } 3415 3416 // Arrays not allowed here, must use JVM_AllocateNewArray 3417 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3418 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3419 ResourceMark rm(THREAD); 3420 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3421 } 3422 3423 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3424 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3425 3426 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3427 3428 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3429 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3430 3431 // Make sure klass is initialized, since we are about to instantiate one of them. 3432 curr_klass->initialize(CHECK_NULL); 3433 3434 methodHandle m (THREAD, 3435 init_klass->find_method(vmSymbols::object_initializer_name(), 3436 vmSymbols::void_method_signature())); 3437 if (m.is_null()) { 3438 ResourceMark rm(THREAD); 3439 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3440 Method::name_and_sig_as_C_string(init_klass(), 3441 vmSymbols::object_initializer_name(), 3442 vmSymbols::void_method_signature())); 3443 } 3444 3445 if (curr_klass == init_klass && !m->is_public()) { 3446 // Calling the constructor for class 'curr_klass'. 3447 // Only allow calls to a public no-arg constructor. 3448 // This path corresponds to creating an Externalizable object. 3449 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3450 } 3451 3452 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3453 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3454 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3455 } 3456 3457 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3458 // Call constructor m. This might call a constructor higher up in the hierachy 3459 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3460 3461 return JNIHandles::make_local(obj()); 3462 JVM_END 3463 3464 3465 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3466 JVMWrapper("JVM_AllocateNewArray"); 3467 JvmtiVMObjectAllocEventCollector oam; 3468 oop mirror = JNIHandles::resolve_non_null(currClass); 3469 3470 if (java_lang_Class::is_primitive(mirror)) { 3471 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3472 } 3473 Klass* k = java_lang_Class::as_Klass(mirror); 3474 oop result; 3475 3476 if (k->oop_is_typeArray()) { 3477 // typeArray 3478 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3479 } else if (k->oop_is_objArray()) { 3480 // objArray 3481 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3482 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3483 result = oak->allocate(length, CHECK_NULL); 3484 } else { 3485 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3486 } 3487 return JNIHandles::make_local(env, result); 3488 JVM_END 3489 3490 3491 // Return the first non-null class loader up the execution stack, or null 3492 // if only code from the null class loader is on the stack. 3493 3494 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3495 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3496 // UseNewReflection 3497 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3498 oop loader = vfst.method()->method_holder()->class_loader(); 3499 if (loader != NULL) { 3500 return JNIHandles::make_local(env, loader); 3501 } 3502 } 3503 return NULL; 3504 JVM_END 3505 3506 3507 // Load a class relative to the most recent class on the stack with a non-null 3508 // classloader. 3509 // This function has been deprecated and should not be considered part of the 3510 // specified JVM interface. 3511 3512 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3513 jclass currClass, jstring currClassName)) 3514 JVMWrapper("JVM_LoadClass0"); 3515 // Receiver is not used 3516 ResourceMark rm(THREAD); 3517 3518 // Class name argument is not guaranteed to be in internal format 3519 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3520 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3521 3522 const char* str = java_lang_String::as_utf8_string(string()); 3523 3524 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3525 // It's impossible to create this class; the name cannot fit 3526 // into the constant pool. 3527 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3528 } 3529 3530 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3531 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3532 // Find the most recent class on the stack with a non-null classloader 3533 oop loader = NULL; 3534 oop protection_domain = NULL; 3535 if (curr_klass.is_null()) { 3536 for (vframeStream vfst(thread); 3537 !vfst.at_end() && loader == NULL; 3538 vfst.next()) { 3539 if (!vfst.method()->is_native()) { 3540 InstanceKlass* holder = vfst.method()->method_holder(); 3541 loader = holder->class_loader(); 3542 protection_domain = holder->protection_domain(); 3543 } 3544 } 3545 } else { 3546 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3547 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3548 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3549 } 3550 Handle h_loader(THREAD, loader); 3551 Handle h_prot (THREAD, protection_domain); 3552 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3553 false, thread); 3554 if (TraceClassResolution && result != NULL) { 3555 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3556 } 3557 return result; 3558 JVM_END 3559 3560 3561 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3562 3563 3564 // resolve array handle and check arguments 3565 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3566 if (arr == NULL) { 3567 THROW_0(vmSymbols::java_lang_NullPointerException()); 3568 } 3569 oop a = JNIHandles::resolve_non_null(arr); 3570 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3571 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3572 } 3573 return arrayOop(a); 3574 } 3575 3576 3577 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3578 JVMWrapper("JVM_GetArrayLength"); 3579 arrayOop a = check_array(env, arr, false, CHECK_0); 3580 return a->length(); 3581 JVM_END 3582 3583 3584 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3585 JVMWrapper("JVM_Array_Get"); 3586 JvmtiVMObjectAllocEventCollector oam; 3587 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3588 jvalue value; 3589 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3590 oop box = Reflection::box(&value, type, CHECK_NULL); 3591 return JNIHandles::make_local(env, box); 3592 JVM_END 3593 3594 3595 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3596 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3597 jvalue value; 3598 value.i = 0; // to initialize value before getting used in CHECK 3599 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3600 assert(a->is_typeArray(), "just checking"); 3601 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3602 BasicType wide_type = (BasicType) wCode; 3603 if (type != wide_type) { 3604 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3605 } 3606 return value; 3607 JVM_END 3608 3609 3610 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3611 JVMWrapper("JVM_SetArrayElement"); 3612 arrayOop a = check_array(env, arr, false, CHECK); 3613 oop box = JNIHandles::resolve(val); 3614 jvalue value; 3615 value.i = 0; // to initialize value before getting used in CHECK 3616 BasicType value_type; 3617 if (a->is_objArray()) { 3618 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3619 value_type = Reflection::unbox_for_regular_object(box, &value); 3620 } else { 3621 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3622 } 3623 Reflection::array_set(&value, a, index, value_type, CHECK); 3624 JVM_END 3625 3626 3627 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3628 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3629 arrayOop a = check_array(env, arr, true, CHECK); 3630 assert(a->is_typeArray(), "just checking"); 3631 BasicType value_type = (BasicType) vCode; 3632 Reflection::array_set(&v, a, index, value_type, CHECK); 3633 JVM_END 3634 3635 3636 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3637 JVMWrapper("JVM_NewArray"); 3638 JvmtiVMObjectAllocEventCollector oam; 3639 oop element_mirror = JNIHandles::resolve(eltClass); 3640 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3641 return JNIHandles::make_local(env, result); 3642 JVM_END 3643 3644 3645 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3646 JVMWrapper("JVM_NewMultiArray"); 3647 JvmtiVMObjectAllocEventCollector oam; 3648 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3649 oop element_mirror = JNIHandles::resolve(eltClass); 3650 assert(dim_array->is_typeArray(), "just checking"); 3651 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3652 return JNIHandles::make_local(env, result); 3653 JVM_END 3654 3655 3656 // Networking library support //////////////////////////////////////////////////////////////////// 3657 3658 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3659 JVMWrapper("JVM_InitializeSocketLibrary"); 3660 return 0; 3661 JVM_END 3662 3663 3664 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3665 JVMWrapper("JVM_Socket"); 3666 return os::socket(domain, type, protocol); 3667 JVM_END 3668 3669 3670 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3671 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3672 //%note jvm_r6 3673 return os::socket_close(fd); 3674 JVM_END 3675 3676 3677 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3678 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3679 //%note jvm_r6 3680 return os::socket_shutdown(fd, howto); 3681 JVM_END 3682 3683 3684 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3685 JVMWrapper2("JVM_Recv (0x%x)", fd); 3686 //%note jvm_r6 3687 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3688 JVM_END 3689 3690 3691 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3692 JVMWrapper2("JVM_Send (0x%x)", fd); 3693 //%note jvm_r6 3694 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3695 JVM_END 3696 3697 3698 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3699 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3700 //%note jvm_r6 3701 return os::timeout(fd, timeout); 3702 JVM_END 3703 3704 3705 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3706 JVMWrapper2("JVM_Listen (0x%x)", fd); 3707 //%note jvm_r6 3708 return os::listen(fd, count); 3709 JVM_END 3710 3711 3712 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3713 JVMWrapper2("JVM_Connect (0x%x)", fd); 3714 //%note jvm_r6 3715 return os::connect(fd, him, (socklen_t)len); 3716 JVM_END 3717 3718 3719 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3720 JVMWrapper2("JVM_Bind (0x%x)", fd); 3721 //%note jvm_r6 3722 return os::bind(fd, him, (socklen_t)len); 3723 JVM_END 3724 3725 3726 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3727 JVMWrapper2("JVM_Accept (0x%x)", fd); 3728 //%note jvm_r6 3729 socklen_t socklen = (socklen_t)(*len); 3730 jint result = os::accept(fd, him, &socklen); 3731 *len = (jint)socklen; 3732 return result; 3733 JVM_END 3734 3735 3736 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3737 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3738 //%note jvm_r6 3739 socklen_t socklen = (socklen_t)(*fromlen); 3740 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3741 *fromlen = (int)socklen; 3742 return result; 3743 JVM_END 3744 3745 3746 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3747 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3748 //%note jvm_r6 3749 socklen_t socklen = (socklen_t)(*len); 3750 jint result = os::get_sock_name(fd, him, &socklen); 3751 *len = (int)socklen; 3752 return result; 3753 JVM_END 3754 3755 3756 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3757 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3758 //%note jvm_r6 3759 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3760 JVM_END 3761 3762 3763 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3764 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3765 //%note jvm_r6 3766 return os::socket_available(fd, pbytes); 3767 JVM_END 3768 3769 3770 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3771 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3772 //%note jvm_r6 3773 socklen_t socklen = (socklen_t)(*optlen); 3774 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3775 *optlen = (int)socklen; 3776 return result; 3777 JVM_END 3778 3779 3780 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3781 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3782 //%note jvm_r6 3783 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3784 JVM_END 3785 3786 3787 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3788 JVMWrapper("JVM_GetHostName"); 3789 return os::get_host_name(name, namelen); 3790 JVM_END 3791 3792 3793 // Library support /////////////////////////////////////////////////////////////////////////// 3794 3795 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3796 //%note jvm_ct 3797 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3798 char ebuf[1024]; 3799 void *load_result; 3800 { 3801 ThreadToNativeFromVM ttnfvm(thread); 3802 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3803 } 3804 if (load_result == NULL) { 3805 char msg[1024]; 3806 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3807 // Since 'ebuf' may contain a string encoded using 3808 // platform encoding scheme, we need to pass 3809 // Exceptions::unsafe_to_utf8 to the new_exception method 3810 // as the last argument. See bug 6367357. 3811 Handle h_exception = 3812 Exceptions::new_exception(thread, 3813 vmSymbols::java_lang_UnsatisfiedLinkError(), 3814 msg, Exceptions::unsafe_to_utf8); 3815 3816 THROW_HANDLE_0(h_exception); 3817 } 3818 return load_result; 3819 JVM_END 3820 3821 3822 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3823 JVMWrapper("JVM_UnloadLibrary"); 3824 os::dll_unload(handle); 3825 JVM_END 3826 3827 3828 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3829 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3830 return os::dll_lookup(handle, name); 3831 JVM_END 3832 3833 3834 // Floating point support //////////////////////////////////////////////////////////////////// 3835 3836 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3837 JVMWrapper("JVM_IsNaN"); 3838 return g_isnan(a); 3839 JVM_END 3840 3841 3842 // JNI version /////////////////////////////////////////////////////////////////////////////// 3843 3844 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3845 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3846 return Threads::is_supported_jni_version_including_1_1(version); 3847 JVM_END 3848 3849 3850 // String support /////////////////////////////////////////////////////////////////////////// 3851 3852 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3853 JVMWrapper("JVM_InternString"); 3854 JvmtiVMObjectAllocEventCollector oam; 3855 if (str == NULL) return NULL; 3856 oop string = JNIHandles::resolve_non_null(str); 3857 oop result = StringTable::intern(string, CHECK_NULL); 3858 return (jstring) JNIHandles::make_local(env, result); 3859 JVM_END 3860 3861 3862 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3863 3864 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3865 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3866 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3867 // that only works with java threads. 3868 3869 3870 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3871 VM_Exit::block_if_vm_exited(); 3872 JVMWrapper("JVM_RawMonitorCreate"); 3873 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3874 } 3875 3876 3877 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3878 VM_Exit::block_if_vm_exited(); 3879 JVMWrapper("JVM_RawMonitorDestroy"); 3880 delete ((Mutex*) mon); 3881 } 3882 3883 3884 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3885 VM_Exit::block_if_vm_exited(); 3886 JVMWrapper("JVM_RawMonitorEnter"); 3887 ((Mutex*) mon)->jvm_raw_lock(); 3888 return 0; 3889 } 3890 3891 3892 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3893 VM_Exit::block_if_vm_exited(); 3894 JVMWrapper("JVM_RawMonitorExit"); 3895 ((Mutex*) mon)->jvm_raw_unlock(); 3896 } 3897 3898 3899 // Support for Serialization 3900 3901 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3902 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3903 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3904 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3905 3906 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3907 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3908 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3909 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3910 3911 3912 void initialize_converter_functions() { 3913 if (JDK_Version::is_gte_jdk14x_version()) { 3914 // These functions only exist for compatibility with 1.3.1 and earlier 3915 return; 3916 } 3917 3918 // called from universe_post_init() 3919 assert( 3920 int_bits_to_float_fn == NULL && 3921 long_bits_to_double_fn == NULL && 3922 float_to_int_bits_fn == NULL && 3923 double_to_long_bits_fn == NULL , 3924 "initialization done twice" 3925 ); 3926 // initialize 3927 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3928 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3929 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3930 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3931 // verify 3932 assert( 3933 int_bits_to_float_fn != NULL && 3934 long_bits_to_double_fn != NULL && 3935 float_to_int_bits_fn != NULL && 3936 double_to_long_bits_fn != NULL , 3937 "initialization failed" 3938 ); 3939 } 3940 3941 3942 3943 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3944 3945 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3946 // Security Note: 3947 // The Java level wrapper will perform the necessary security check allowing 3948 // us to pass the NULL as the initiating class loader. 3949 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3950 3951 KlassHandle klass_handle(THREAD, klass); 3952 // Check if we should initialize the class 3953 if (init && klass_handle->oop_is_instance()) { 3954 klass_handle->initialize(CHECK_NULL); 3955 } 3956 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3957 } 3958 3959 3960 // Method /////////////////////////////////////////////////////////////////////////////////////////// 3961 3962 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3963 JVMWrapper("JVM_InvokeMethod"); 3964 Handle method_handle; 3965 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3966 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3967 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3968 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3969 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3970 jobject res = JNIHandles::make_local(env, result); 3971 if (JvmtiExport::should_post_vm_object_alloc()) { 3972 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 3973 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 3974 if (java_lang_Class::is_primitive(ret_type)) { 3975 // Only for primitive type vm allocates memory for java object. 3976 // See box() method. 3977 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 3978 } 3979 } 3980 return res; 3981 } else { 3982 THROW_0(vmSymbols::java_lang_StackOverflowError()); 3983 } 3984 JVM_END 3985 3986 3987 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 3988 JVMWrapper("JVM_NewInstanceFromConstructor"); 3989 oop constructor_mirror = JNIHandles::resolve(c); 3990 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3991 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 3992 jobject res = JNIHandles::make_local(env, result); 3993 if (JvmtiExport::should_post_vm_object_alloc()) { 3994 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 3995 } 3996 return res; 3997 JVM_END 3998 3999 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4000 4001 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4002 JVMWrapper("JVM_SupportsCX8"); 4003 return VM_Version::supports_cx8(); 4004 JVM_END 4005 4006 4007 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4008 JVMWrapper("JVM_CX8Field"); 4009 jlong res; 4010 oop o = JNIHandles::resolve(obj); 4011 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4012 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4013 4014 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4015 res = Atomic::cmpxchg(newVal, addr, oldVal); 4016 4017 return res == oldVal; 4018 JVM_END 4019 4020 // DTrace /////////////////////////////////////////////////////////////////// 4021 4022 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4023 JVMWrapper("JVM_DTraceGetVersion"); 4024 return (jint)JVM_TRACING_DTRACE_VERSION; 4025 JVM_END 4026 4027 JVM_ENTRY(jlong,JVM_DTraceActivate( 4028 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4029 JVM_DTraceProvider* providers)) 4030 JVMWrapper("JVM_DTraceActivate"); 4031 return DTraceJSDT::activate( 4032 version, module_name, providers_count, providers, CHECK_0); 4033 JVM_END 4034 4035 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4036 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4037 return DTraceJSDT::is_probe_enabled(method); 4038 JVM_END 4039 4040 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4041 JVMWrapper("JVM_DTraceDispose"); 4042 DTraceJSDT::dispose(handle); 4043 JVM_END 4044 4045 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4046 JVMWrapper("JVM_DTraceIsSupported"); 4047 return DTraceJSDT::is_supported(); 4048 JVM_END 4049 4050 // Returns an array of all live Thread objects (VM internal JavaThreads, 4051 // jvmti agent threads, and JNI attaching threads are skipped) 4052 // See CR 6404306 regarding JNI attaching threads 4053 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4054 ResourceMark rm(THREAD); 4055 ThreadsListEnumerator tle(THREAD, false, false); 4056 JvmtiVMObjectAllocEventCollector oam; 4057 4058 int num_threads = tle.num_threads(); 4059 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4060 objArrayHandle threads_ah(THREAD, r); 4061 4062 for (int i = 0; i < num_threads; i++) { 4063 Handle h = tle.get_threadObj(i); 4064 threads_ah->obj_at_put(i, h()); 4065 } 4066 4067 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4068 JVM_END 4069 4070 4071 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4072 // Return StackTraceElement[][], each element is the stack trace of a thread in 4073 // the corresponding entry in the given threads array 4074 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4075 JVMWrapper("JVM_DumpThreads"); 4076 JvmtiVMObjectAllocEventCollector oam; 4077 4078 // Check if threads is null 4079 if (threads == NULL) { 4080 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4081 } 4082 4083 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4084 objArrayHandle ah(THREAD, a); 4085 int num_threads = ah->length(); 4086 // check if threads is non-empty array 4087 if (num_threads == 0) { 4088 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4089 } 4090 4091 // check if threads is not an array of objects of Thread class 4092 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4093 if (k != SystemDictionary::Thread_klass()) { 4094 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4095 } 4096 4097 ResourceMark rm(THREAD); 4098 4099 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4100 for (int i = 0; i < num_threads; i++) { 4101 oop thread_obj = ah->obj_at(i); 4102 instanceHandle h(THREAD, (instanceOop) thread_obj); 4103 thread_handle_array->append(h); 4104 } 4105 4106 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4107 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4108 4109 JVM_END 4110 4111 // JVM monitoring and management support 4112 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4113 return Management::get_jmm_interface(version); 4114 JVM_END 4115 4116 // com.sun.tools.attach.VirtualMachine agent properties support 4117 // 4118 // Initialize the agent properties with the properties maintained in the VM 4119 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4120 JVMWrapper("JVM_InitAgentProperties"); 4121 ResourceMark rm; 4122 4123 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4124 4125 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4126 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4127 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4128 return properties; 4129 JVM_END 4130 4131 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4132 { 4133 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4134 JvmtiVMObjectAllocEventCollector oam; 4135 4136 if (ofClass == NULL) { 4137 return NULL; 4138 } 4139 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4140 // Special handling for primitive objects 4141 if (java_lang_Class::is_primitive(mirror())) { 4142 return NULL; 4143 } 4144 Klass* k = java_lang_Class::as_Klass(mirror()); 4145 if (!k->oop_is_instance()) { 4146 return NULL; 4147 } 4148 instanceKlassHandle ik_h(THREAD, k); 4149 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4150 if (encl_method_class_idx == 0) { 4151 return NULL; 4152 } 4153 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4154 objArrayHandle dest(THREAD, dest_o); 4155 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4156 dest->obj_at_put(0, enc_k->java_mirror()); 4157 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4158 if (encl_method_method_idx != 0) { 4159 Symbol* sym = ik_h->constants()->symbol_at( 4160 extract_low_short_from_int( 4161 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4162 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4163 dest->obj_at_put(1, str()); 4164 sym = ik_h->constants()->symbol_at( 4165 extract_high_short_from_int( 4166 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4167 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4168 dest->obj_at_put(2, str()); 4169 } 4170 return (jobjectArray) JNIHandles::make_local(dest()); 4171 } 4172 JVM_END 4173 4174 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4175 jint javaThreadState)) 4176 { 4177 // If new thread states are added in future JDK and VM versions, 4178 // this should check if the JDK version is compatible with thread 4179 // states supported by the VM. Return NULL if not compatible. 4180 // 4181 // This function must map the VM java_lang_Thread::ThreadStatus 4182 // to the Java thread state that the JDK supports. 4183 // 4184 4185 typeArrayHandle values_h; 4186 switch (javaThreadState) { 4187 case JAVA_THREAD_STATE_NEW : { 4188 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4189 values_h = typeArrayHandle(THREAD, r); 4190 values_h->int_at_put(0, java_lang_Thread::NEW); 4191 break; 4192 } 4193 case JAVA_THREAD_STATE_RUNNABLE : { 4194 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4195 values_h = typeArrayHandle(THREAD, r); 4196 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4197 break; 4198 } 4199 case JAVA_THREAD_STATE_BLOCKED : { 4200 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4201 values_h = typeArrayHandle(THREAD, r); 4202 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4203 break; 4204 } 4205 case JAVA_THREAD_STATE_WAITING : { 4206 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4207 values_h = typeArrayHandle(THREAD, r); 4208 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4209 values_h->int_at_put(1, java_lang_Thread::PARKED); 4210 break; 4211 } 4212 case JAVA_THREAD_STATE_TIMED_WAITING : { 4213 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4214 values_h = typeArrayHandle(THREAD, r); 4215 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4216 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4217 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4218 break; 4219 } 4220 case JAVA_THREAD_STATE_TERMINATED : { 4221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4222 values_h = typeArrayHandle(THREAD, r); 4223 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4224 break; 4225 } 4226 default: 4227 // Unknown state - probably incompatible JDK version 4228 return NULL; 4229 } 4230 4231 return (jintArray) JNIHandles::make_local(env, values_h()); 4232 } 4233 JVM_END 4234 4235 4236 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4237 jint javaThreadState, 4238 jintArray values)) 4239 { 4240 // If new thread states are added in future JDK and VM versions, 4241 // this should check if the JDK version is compatible with thread 4242 // states supported by the VM. Return NULL if not compatible. 4243 // 4244 // This function must map the VM java_lang_Thread::ThreadStatus 4245 // to the Java thread state that the JDK supports. 4246 // 4247 4248 ResourceMark rm; 4249 4250 // Check if threads is null 4251 if (values == NULL) { 4252 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4253 } 4254 4255 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4256 typeArrayHandle values_h(THREAD, v); 4257 4258 objArrayHandle names_h; 4259 switch (javaThreadState) { 4260 case JAVA_THREAD_STATE_NEW : { 4261 assert(values_h->length() == 1 && 4262 values_h->int_at(0) == java_lang_Thread::NEW, 4263 "Invalid threadStatus value"); 4264 4265 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4266 1, /* only 1 substate */ 4267 CHECK_NULL); 4268 names_h = objArrayHandle(THREAD, r); 4269 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4270 names_h->obj_at_put(0, name()); 4271 break; 4272 } 4273 case JAVA_THREAD_STATE_RUNNABLE : { 4274 assert(values_h->length() == 1 && 4275 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4276 "Invalid threadStatus value"); 4277 4278 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4279 1, /* only 1 substate */ 4280 CHECK_NULL); 4281 names_h = objArrayHandle(THREAD, r); 4282 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4283 names_h->obj_at_put(0, name()); 4284 break; 4285 } 4286 case JAVA_THREAD_STATE_BLOCKED : { 4287 assert(values_h->length() == 1 && 4288 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4289 "Invalid threadStatus value"); 4290 4291 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4292 1, /* only 1 substate */ 4293 CHECK_NULL); 4294 names_h = objArrayHandle(THREAD, r); 4295 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4296 names_h->obj_at_put(0, name()); 4297 break; 4298 } 4299 case JAVA_THREAD_STATE_WAITING : { 4300 assert(values_h->length() == 2 && 4301 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4302 values_h->int_at(1) == java_lang_Thread::PARKED, 4303 "Invalid threadStatus value"); 4304 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4305 2, /* number of substates */ 4306 CHECK_NULL); 4307 names_h = objArrayHandle(THREAD, r); 4308 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4309 CHECK_NULL); 4310 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4311 CHECK_NULL); 4312 names_h->obj_at_put(0, name0()); 4313 names_h->obj_at_put(1, name1()); 4314 break; 4315 } 4316 case JAVA_THREAD_STATE_TIMED_WAITING : { 4317 assert(values_h->length() == 3 && 4318 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4319 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4320 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4321 "Invalid threadStatus value"); 4322 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4323 3, /* number of substates */ 4324 CHECK_NULL); 4325 names_h = objArrayHandle(THREAD, r); 4326 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4327 CHECK_NULL); 4328 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4329 CHECK_NULL); 4330 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4331 CHECK_NULL); 4332 names_h->obj_at_put(0, name0()); 4333 names_h->obj_at_put(1, name1()); 4334 names_h->obj_at_put(2, name2()); 4335 break; 4336 } 4337 case JAVA_THREAD_STATE_TERMINATED : { 4338 assert(values_h->length() == 1 && 4339 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4340 "Invalid threadStatus value"); 4341 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4342 1, /* only 1 substate */ 4343 CHECK_NULL); 4344 names_h = objArrayHandle(THREAD, r); 4345 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4346 names_h->obj_at_put(0, name()); 4347 break; 4348 } 4349 default: 4350 // Unknown state - probably incompatible JDK version 4351 return NULL; 4352 } 4353 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4354 } 4355 JVM_END 4356 4357 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4358 { 4359 memset(info, 0, sizeof(info_size)); 4360 4361 info->jvm_version = Abstract_VM_Version::jvm_version(); 4362 info->update_version = 0; /* 0 in HotSpot Express VM */ 4363 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4364 4365 // when we add a new capability in the jvm_version_info struct, we should also 4366 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4367 // counter defined in runtimeService.cpp. 4368 info->is_attachable = AttachListener::is_attach_supported(); 4369 } 4370 JVM_END