1 /* 2 * Copyright (c) 1997, 2013, 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_bsd 80 # include "jvm_bsd.h" 81 #endif 82 83 #include <errno.h> 84 85 /* 86 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 87 such ctors and calls MUST NOT come between an oop declaration/init and its 88 usage because if objects are move this may cause various memory stomps, bus 89 errors and segfaults. Here is a cookbook for causing so called "naked oop 90 failures": 91 92 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 93 JVMWrapper("JVM_GetClassDeclaredFields"); 94 95 // Object address to be held directly in mirror & not visible to GC 96 oop mirror = JNIHandles::resolve_non_null(ofClass); 97 98 // If this ctor can hit a safepoint, moving objects around, then 99 ComplexConstructor foo; 100 101 // Boom! mirror may point to JUNK instead of the intended object 102 (some dereference of mirror) 103 104 // Here's another call that may block for GC, making mirror stale 105 MutexLocker ml(some_lock); 106 107 // And here's an initializer that can result in a stale oop 108 // all in one step. 109 oop o = call_that_can_throw_exception(TRAPS); 110 111 112 The solution is to keep the oop declaration BELOW the ctor or function 113 call that might cause a GC, do another resolve to reassign the oop, or 114 consider use of a Handle instead of an oop so there is immunity from object 115 motion. But note that the "QUICK" entries below do not have a handlemark 116 and thus can only support use of handles passed in. 117 */ 118 119 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 120 ResourceMark rm; 121 int line_number = -1; 122 const char * source_file = NULL; 123 const char * trace = "explicit"; 124 InstanceKlass* caller = NULL; 125 JavaThread* jthread = JavaThread::current(); 126 if (jthread->has_last_Java_frame()) { 127 vframeStream vfst(jthread); 128 129 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 130 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 131 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 132 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 133 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 134 135 Method* last_caller = NULL; 136 137 while (!vfst.at_end()) { 138 Method* m = vfst.method(); 139 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 140 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 141 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 142 break; 143 } 144 last_caller = m; 145 vfst.next(); 146 } 147 // if this is called from Class.forName0 and that is called from Class.forName, 148 // then print the caller of Class.forName. If this is Class.loadClass, then print 149 // that caller, otherwise keep quiet since this should be picked up elsewhere. 150 bool found_it = false; 151 if (!vfst.at_end() && 152 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 153 vfst.method()->name() == vmSymbols::forName0_name()) { 154 vfst.next(); 155 if (!vfst.at_end() && 156 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 157 vfst.method()->name() == vmSymbols::forName_name()) { 158 vfst.next(); 159 found_it = true; 160 } 161 } else if (last_caller != NULL && 162 last_caller->method_holder()->name() == 163 vmSymbols::java_lang_ClassLoader() && 164 (last_caller->name() == vmSymbols::loadClassInternal_name() || 165 last_caller->name() == vmSymbols::loadClass_name())) { 166 found_it = true; 167 } else if (!vfst.at_end()) { 168 if (vfst.method()->is_native()) { 169 // JNI call 170 found_it = true; 171 } 172 } 173 if (found_it && !vfst.at_end()) { 174 // found the caller 175 caller = vfst.method()->method_holder(); 176 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 177 if (line_number == -1) { 178 // show method name if it's a native method 179 trace = vfst.method()->name_and_sig_as_C_string(); 180 } 181 Symbol* s = caller->source_file_name(); 182 if (s != NULL) { 183 source_file = s->as_C_string(); 184 } 185 } 186 } 187 if (caller != NULL) { 188 if (to_class != caller) { 189 const char * from = caller->external_name(); 190 const char * to = to_class->external_name(); 191 // print in a single call to reduce interleaving between threads 192 if (source_file != NULL) { 193 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 194 } else { 195 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 196 } 197 } 198 } 199 } 200 201 void trace_class_resolution(Klass* to_class) { 202 EXCEPTION_MARK; 203 trace_class_resolution_impl(to_class, THREAD); 204 if (HAS_PENDING_EXCEPTION) { 205 CLEAR_PENDING_EXCEPTION; 206 } 207 } 208 209 // Wrapper to trace JVM functions 210 211 #ifdef ASSERT 212 class JVMTraceWrapper : public StackObj { 213 public: 214 JVMTraceWrapper(const char* format, ...) { 215 if (TraceJVMCalls) { 216 va_list ap; 217 va_start(ap, format); 218 tty->print("JVM "); 219 tty->vprint_cr(format, ap); 220 va_end(ap); 221 } 222 } 223 }; 224 225 Histogram* JVMHistogram; 226 volatile jint JVMHistogram_lock = 0; 227 228 class JVMHistogramElement : public HistogramElement { 229 public: 230 JVMHistogramElement(const char* name); 231 }; 232 233 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 234 _name = elementName; 235 uintx count = 0; 236 237 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 238 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 239 count +=1; 240 if ( (WarnOnStalledSpinLock > 0) 241 && (count % WarnOnStalledSpinLock == 0)) { 242 warning("JVMHistogram_lock seems to be stalled"); 243 } 244 } 245 } 246 247 if(JVMHistogram == NULL) 248 JVMHistogram = new Histogram("JVM Call Counts",100); 249 250 JVMHistogram->add_element(this); 251 Atomic::dec(&JVMHistogram_lock); 252 } 253 254 #define JVMCountWrapper(arg) \ 255 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 256 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 257 258 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 259 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 260 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 261 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 262 #else 263 #define JVMWrapper(arg1) 264 #define JVMWrapper2(arg1, arg2) 265 #define JVMWrapper3(arg1, arg2, arg3) 266 #define JVMWrapper4(arg1, arg2, arg3, arg4) 267 #endif 268 269 270 // Interface version ///////////////////////////////////////////////////////////////////// 271 272 273 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 274 return JVM_INTERFACE_VERSION; 275 JVM_END 276 277 278 // java.lang.System ////////////////////////////////////////////////////////////////////// 279 280 281 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 282 JVMWrapper("JVM_CurrentTimeMillis"); 283 return os::javaTimeMillis(); 284 JVM_END 285 286 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 287 JVMWrapper("JVM_NanoTime"); 288 return os::javaTimeNanos(); 289 JVM_END 290 291 292 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 293 jobject dst, jint dst_pos, jint length)) 294 JVMWrapper("JVM_ArrayCopy"); 295 // Check if we have null pointers 296 if (src == NULL || dst == NULL) { 297 THROW(vmSymbols::java_lang_NullPointerException()); 298 } 299 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 300 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 301 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 302 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 303 // Do copy 304 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 305 JVM_END 306 307 308 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 309 JavaValue r(T_OBJECT); 310 // public synchronized Object put(Object key, Object value); 311 HandleMark hm(THREAD); 312 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 313 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 314 JavaCalls::call_virtual(&r, 315 props, 316 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 317 vmSymbols::put_name(), 318 vmSymbols::object_object_object_signature(), 319 key_str, 320 value_str, 321 THREAD); 322 } 323 324 325 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 326 327 328 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 329 JVMWrapper("JVM_InitProperties"); 330 ResourceMark rm; 331 332 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 333 334 // System property list includes both user set via -D option and 335 // jvm system specific properties. 336 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 337 PUTPROP(props, p->key(), p->value()); 338 } 339 340 // Convert the -XX:MaxDirectMemorySize= command line flag 341 // to the sun.nio.MaxDirectMemorySize property. 342 // Do this after setting user properties to prevent people 343 // from setting the value with a -D option, as requested. 344 { 345 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 346 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 347 } else { 348 char as_chars[256]; 349 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 350 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 351 } 352 } 353 354 // JVM monitoring and management support 355 // Add the sun.management.compiler property for the compiler's name 356 { 357 #undef CSIZE 358 #if defined(_LP64) || defined(_WIN64) 359 #define CSIZE "64-Bit " 360 #else 361 #define CSIZE 362 #endif // 64bit 363 364 #ifdef TIERED 365 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 366 #else 367 #if defined(COMPILER1) 368 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 369 #elif defined(COMPILER2) 370 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 371 #else 372 const char* compiler_name = ""; 373 #endif // compilers 374 #endif // TIERED 375 376 if (*compiler_name != '\0' && 377 (Arguments::mode() != Arguments::_int)) { 378 PUTPROP(props, "sun.management.compiler", compiler_name); 379 } 380 } 381 382 return properties; 383 JVM_END 384 385 386 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 387 388 extern volatile jint vm_created; 389 390 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 391 if (vm_created != 0 && (code == 0)) { 392 // The VM is about to exit. We call back into Java to check whether finalizers should be run 393 Universe::run_finalizers_on_exit(); 394 } 395 before_exit(thread); 396 vm_exit(code); 397 JVM_END 398 399 400 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 401 before_exit(thread); 402 vm_exit(code); 403 JVM_END 404 405 406 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 407 register_on_exit_function(func); 408 JVM_END 409 410 411 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 412 JVMWrapper("JVM_GC"); 413 if (!DisableExplicitGC) { 414 Universe::heap()->collect(GCCause::_java_lang_system_gc); 415 } 416 JVM_END 417 418 419 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 420 JVMWrapper("JVM_MaxObjectInspectionAge"); 421 return Universe::heap()->millis_since_last_gc(); 422 JVM_END 423 424 425 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 426 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 427 JVM_END 428 429 430 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 431 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 432 JVM_END 433 434 static inline jlong convert_size_t_to_jlong(size_t val) { 435 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 436 NOT_LP64 (return (jlong)val;) 437 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 438 } 439 440 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 441 JVMWrapper("JVM_TotalMemory"); 442 size_t n = Universe::heap()->capacity(); 443 return convert_size_t_to_jlong(n); 444 JVM_END 445 446 447 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 448 JVMWrapper("JVM_FreeMemory"); 449 CollectedHeap* ch = Universe::heap(); 450 size_t n; 451 { 452 MutexLocker x(Heap_lock); 453 n = ch->capacity() - ch->used(); 454 } 455 return convert_size_t_to_jlong(n); 456 JVM_END 457 458 459 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 460 JVMWrapper("JVM_MaxMemory"); 461 size_t n = Universe::heap()->max_capacity(); 462 return convert_size_t_to_jlong(n); 463 JVM_END 464 465 466 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 467 JVMWrapper("JVM_ActiveProcessorCount"); 468 return os::active_processor_count(); 469 JVM_END 470 471 472 473 // java.lang.Throwable ////////////////////////////////////////////////////// 474 475 476 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 477 JVMWrapper("JVM_FillInStackTrace"); 478 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 479 java_lang_Throwable::fill_in_stack_trace(exception); 480 JVM_END 481 482 483 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 484 JVMWrapper("JVM_GetStackTraceDepth"); 485 oop exception = JNIHandles::resolve(throwable); 486 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 487 JVM_END 488 489 490 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 491 JVMWrapper("JVM_GetStackTraceElement"); 492 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 493 oop exception = JNIHandles::resolve(throwable); 494 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 495 return JNIHandles::make_local(env, element); 496 JVM_END 497 498 499 // java.lang.Object /////////////////////////////////////////////// 500 501 502 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 503 JVMWrapper("JVM_IHashCode"); 504 // as implemented in the classic virtual machine; return 0 if object is NULL 505 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 506 JVM_END 507 508 509 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 510 JVMWrapper("JVM_MonitorWait"); 511 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 512 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 513 if (JvmtiExport::should_post_monitor_wait()) { 514 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 515 } 516 ObjectSynchronizer::wait(obj, ms, CHECK); 517 JVM_END 518 519 520 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 521 JVMWrapper("JVM_MonitorNotify"); 522 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 523 ObjectSynchronizer::notify(obj, CHECK); 524 JVM_END 525 526 527 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 528 JVMWrapper("JVM_MonitorNotifyAll"); 529 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 530 ObjectSynchronizer::notifyall(obj, CHECK); 531 JVM_END 532 533 534 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 535 JVMWrapper("JVM_Clone"); 536 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 537 const KlassHandle klass (THREAD, obj->klass()); 538 JvmtiVMObjectAllocEventCollector oam; 539 540 #ifdef ASSERT 541 // Just checking that the cloneable flag is set correct 542 if (obj->is_array()) { 543 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 544 } else { 545 guarantee(obj->is_instance(), "should be instanceOop"); 546 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 547 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 548 } 549 #endif 550 551 // Check if class of obj supports the Cloneable interface. 552 // All arrays are considered to be cloneable (See JLS 20.1.5) 553 if (!klass->is_cloneable()) { 554 ResourceMark rm(THREAD); 555 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 556 } 557 558 // Make shallow object copy 559 const int size = obj->size(); 560 oop new_obj = NULL; 561 if (obj->is_array()) { 562 const int length = ((arrayOop)obj())->length(); 563 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 564 } else { 565 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 566 } 567 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 568 // is modifying a reference field in the clonee, a non-oop-atomic copy might 569 // be suspended in the middle of copying the pointer and end up with parts 570 // of two different pointers in the field. Subsequent dereferences will crash. 571 // 4846409: an oop-copy of objects with long or double fields or arrays of same 572 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 573 // of oops. We know objects are aligned on a minimum of an jlong boundary. 574 // The same is true of StubRoutines::object_copy and the various oop_copy 575 // variants, and of the code generated by the inline_native_clone intrinsic. 576 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 577 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 578 (size_t)align_object_size(size) / HeapWordsPerLong); 579 // Clear the header 580 new_obj->init_mark(); 581 582 // Store check (mark entire object and let gc sort it out) 583 BarrierSet* bs = Universe::heap()->barrier_set(); 584 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 585 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 586 587 // Caution: this involves a java upcall, so the clone should be 588 // "gc-robust" by this stage. 589 if (klass->has_finalizer()) { 590 assert(obj->is_instance(), "should be instanceOop"); 591 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 592 } 593 594 return JNIHandles::make_local(env, oop(new_obj)); 595 JVM_END 596 597 // java.lang.Compiler //////////////////////////////////////////////////// 598 599 // The initial cuts of the HotSpot VM will not support JITs, and all existing 600 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 601 // functions are all silently ignored unless JVM warnings are printed. 602 603 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 604 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 605 JVM_END 606 607 608 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 609 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 610 return JNI_FALSE; 611 JVM_END 612 613 614 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 615 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 616 return JNI_FALSE; 617 JVM_END 618 619 620 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 621 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 622 return JNI_FALSE; 623 JVM_END 624 625 626 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 627 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 628 return NULL; 629 JVM_END 630 631 632 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 633 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 634 JVM_END 635 636 637 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 638 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 639 JVM_END 640 641 642 643 // Error message support ////////////////////////////////////////////////////// 644 645 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 646 JVMWrapper("JVM_GetLastErrorString"); 647 return (jint)os::lasterror(buf, len); 648 JVM_END 649 650 651 // java.io.File /////////////////////////////////////////////////////////////// 652 653 JVM_LEAF(char*, JVM_NativePath(char* path)) 654 JVMWrapper2("JVM_NativePath (%s)", path); 655 return os::native_path(path); 656 JVM_END 657 658 659 // Misc. class handling /////////////////////////////////////////////////////////// 660 661 662 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 663 JVMWrapper("JVM_GetCallerClass"); 664 665 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or 666 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided 667 // temporarily for existing code to use until a replacement API is defined. 668 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { 669 Klass* k = thread->security_get_caller_class(depth); 670 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 671 } 672 673 // Getting the class of the caller frame. 674 // 675 // The call stack at this point looks something like this: 676 // 677 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 678 // [1] [ @CallerSensitive API.method ] 679 // [.] [ (skipped intermediate frames) ] 680 // [n] [ caller ] 681 vframeStream vfst(thread); 682 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 683 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 684 Method* m = vfst.method(); 685 assert(m != NULL, "sanity"); 686 switch (n) { 687 case 0: 688 // This must only be called from Reflection.getCallerClass 689 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 690 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 691 } 692 // fall-through 693 case 1: 694 // Frame 0 and 1 must be caller sensitive. 695 if (!m->caller_sensitive()) { 696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 697 } 698 break; 699 default: 700 if (!m->is_ignored_by_security_stack_walk()) { 701 // We have reached the desired frame; return the holder class. 702 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 703 } 704 break; 705 } 706 } 707 return NULL; 708 JVM_END 709 710 711 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 712 JVMWrapper("JVM_FindPrimitiveClass"); 713 oop mirror = NULL; 714 BasicType t = name2type(utf); 715 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 716 mirror = Universe::java_mirror(t); 717 } 718 if (mirror == NULL) { 719 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 720 } else { 721 return (jclass) JNIHandles::make_local(env, mirror); 722 } 723 JVM_END 724 725 726 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 727 JVMWrapper("JVM_ResolveClass"); 728 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 729 JVM_END 730 731 732 // Returns a class loaded by the bootstrap class loader; or null 733 // if not found. ClassNotFoundException is not thrown. 734 // 735 // Rationale behind JVM_FindClassFromBootLoader 736 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 737 // b> because of (a) java.dll has a direct dependecy on the unexported 738 // private symbol "_JVM_FindClassFromClassLoader@20". 739 // c> the launcher cannot use the private symbol as it dynamically opens 740 // the entry point, so if something changes, the launcher will fail 741 // unexpectedly at runtime, it is safest for the launcher to dlopen a 742 // stable exported interface. 743 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 744 // signature to change from _JVM_FindClassFromClassLoader@20 to 745 // JVM_FindClassFromClassLoader and will not be backward compatible 746 // with older JDKs. 747 // Thus a public/stable exported entry point is the right solution, 748 // public here means public in linker semantics, and is exported only 749 // to the JDK, and is not intended to be a public API. 750 751 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 752 const char* name)) 753 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 754 755 // Java libraries should ensure that name is never null... 756 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 757 // It's impossible to create this class; the name cannot fit 758 // into the constant pool. 759 return NULL; 760 } 761 762 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 763 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 764 if (k == NULL) { 765 return NULL; 766 } 767 768 if (TraceClassResolution) { 769 trace_class_resolution(k); 770 } 771 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 772 JVM_END 773 774 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 775 jboolean init, jobject loader, 776 jboolean throwError)) 777 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 778 throwError ? "error" : "exception"); 779 // Java libraries should ensure that name is never null... 780 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 781 // It's impossible to create this class; the name cannot fit 782 // into the constant pool. 783 if (throwError) { 784 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 785 } else { 786 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 787 } 788 } 789 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 790 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 791 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 792 Handle(), throwError, THREAD); 793 794 if (TraceClassResolution && result != NULL) { 795 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 796 } 797 return result; 798 JVM_END 799 800 801 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 802 jboolean init, jclass from)) 803 JVMWrapper2("JVM_FindClassFromClass %s", name); 804 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 805 // It's impossible to create this class; the name cannot fit 806 // into the constant pool. 807 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 808 } 809 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 810 oop from_class_oop = JNIHandles::resolve(from); 811 Klass* from_class = (from_class_oop == NULL) 812 ? (Klass*)NULL 813 : java_lang_Class::as_Klass(from_class_oop); 814 oop class_loader = NULL; 815 oop protection_domain = NULL; 816 if (from_class != NULL) { 817 class_loader = from_class->class_loader(); 818 protection_domain = from_class->protection_domain(); 819 } 820 Handle h_loader(THREAD, class_loader); 821 Handle h_prot (THREAD, protection_domain); 822 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 823 h_prot, true, thread); 824 825 if (TraceClassResolution && result != NULL) { 826 // this function is generally only used for class loading during verification. 827 ResourceMark rm; 828 oop from_mirror = JNIHandles::resolve_non_null(from); 829 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 830 const char * from_name = from_class->external_name(); 831 832 oop mirror = JNIHandles::resolve_non_null(result); 833 Klass* to_class = java_lang_Class::as_Klass(mirror); 834 const char * to = to_class->external_name(); 835 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 836 } 837 838 return result; 839 JVM_END 840 841 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 842 if (loader.is_null()) { 843 return; 844 } 845 846 // check whether the current caller thread holds the lock or not. 847 // If not, increment the corresponding counter 848 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 849 ObjectSynchronizer::owner_self) { 850 counter->inc(); 851 } 852 } 853 854 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 855 // and JVM_DefineClassWithSourceCond() 856 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 857 jobject loader, const jbyte *buf, 858 jsize len, jobject pd, const char *source, 859 jboolean verify, TRAPS) { 860 if (source == NULL) source = "__JVM_DefineClass__"; 861 862 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 863 JavaThread* jt = (JavaThread*) THREAD; 864 865 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 866 ClassLoader::perf_define_appclass_selftime(), 867 ClassLoader::perf_define_appclasses(), 868 jt->get_thread_stat()->perf_recursion_counts_addr(), 869 jt->get_thread_stat()->perf_timers_addr(), 870 PerfClassTraceTime::DEFINE_CLASS); 871 872 if (UsePerfData) { 873 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 874 } 875 876 // Since exceptions can be thrown, class initialization can take place 877 // if name is NULL no check for class name in .class stream has to be made. 878 TempNewSymbol class_name = NULL; 879 if (name != NULL) { 880 const int str_len = (int)strlen(name); 881 if (str_len > Symbol::max_length()) { 882 // It's impossible to create this class; the name cannot fit 883 // into the constant pool. 884 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 885 } 886 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 887 } 888 889 ResourceMark rm(THREAD); 890 ClassFileStream st((u1*) buf, len, (char *)source); 891 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 892 if (UsePerfData) { 893 is_lock_held_by_thread(class_loader, 894 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 895 THREAD); 896 } 897 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 898 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 899 protection_domain, &st, 900 verify != 0, 901 CHECK_NULL); 902 903 if (TraceClassResolution && k != NULL) { 904 trace_class_resolution(k); 905 } 906 907 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 908 } 909 910 911 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 912 JVMWrapper2("JVM_DefineClass %s", name); 913 914 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 915 JVM_END 916 917 918 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 919 JVMWrapper2("JVM_DefineClassWithSource %s", name); 920 921 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 922 JVM_END 923 924 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 925 jobject loader, const jbyte *buf, 926 jsize len, jobject pd, 927 const char *source, jboolean verify)) 928 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 929 930 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 931 JVM_END 932 933 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 934 JVMWrapper("JVM_FindLoadedClass"); 935 ResourceMark rm(THREAD); 936 937 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 938 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 939 940 const char* str = java_lang_String::as_utf8_string(string()); 941 // Sanity check, don't expect null 942 if (str == NULL) return NULL; 943 944 const int str_len = (int)strlen(str); 945 if (str_len > Symbol::max_length()) { 946 // It's impossible to create this class; the name cannot fit 947 // into the constant pool. 948 return NULL; 949 } 950 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 951 952 // Security Note: 953 // The Java level wrapper will perform the necessary security check allowing 954 // us to pass the NULL as the initiating class loader. 955 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 956 if (UsePerfData) { 957 is_lock_held_by_thread(h_loader, 958 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 959 THREAD); 960 } 961 962 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 963 h_loader, 964 Handle(), 965 CHECK_NULL); 966 967 return (k == NULL) ? NULL : 968 (jclass) JNIHandles::make_local(env, k->java_mirror()); 969 JVM_END 970 971 972 // Reflection support ////////////////////////////////////////////////////////////////////////////// 973 974 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 975 assert (cls != NULL, "illegal class"); 976 JVMWrapper("JVM_GetClassName"); 977 JvmtiVMObjectAllocEventCollector oam; 978 ResourceMark rm(THREAD); 979 const char* name; 980 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 981 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 982 } else { 983 // Consider caching interned string in Klass 984 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 985 assert(k->is_klass(), "just checking"); 986 name = k->external_name(); 987 } 988 oop result = StringTable::intern((char*) name, CHECK_NULL); 989 return (jstring) JNIHandles::make_local(env, result); 990 JVM_END 991 992 993 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 994 JVMWrapper("JVM_GetClassInterfaces"); 995 JvmtiVMObjectAllocEventCollector oam; 996 oop mirror = JNIHandles::resolve_non_null(cls); 997 998 // Special handling for primitive objects 999 if (java_lang_Class::is_primitive(mirror)) { 1000 // Primitive objects does not have any interfaces 1001 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1002 return (jobjectArray) JNIHandles::make_local(env, r); 1003 } 1004 1005 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1006 // Figure size of result array 1007 int size; 1008 if (klass->oop_is_instance()) { 1009 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1010 } else { 1011 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1012 size = 2; 1013 } 1014 1015 // Allocate result array 1016 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1017 objArrayHandle result (THREAD, r); 1018 // Fill in result 1019 if (klass->oop_is_instance()) { 1020 // Regular instance klass, fill in all local interfaces 1021 for (int index = 0; index < size; index++) { 1022 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1023 result->obj_at_put(index, k->java_mirror()); 1024 } 1025 } else { 1026 // All arrays implement java.lang.Cloneable and java.io.Serializable 1027 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1028 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1029 } 1030 return (jobjectArray) JNIHandles::make_local(env, result()); 1031 JVM_END 1032 1033 1034 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1035 JVMWrapper("JVM_GetClassLoader"); 1036 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1037 return NULL; 1038 } 1039 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1040 oop loader = k->class_loader(); 1041 return JNIHandles::make_local(env, loader); 1042 JVM_END 1043 1044 1045 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1046 JVMWrapper("JVM_IsInterface"); 1047 oop mirror = JNIHandles::resolve_non_null(cls); 1048 if (java_lang_Class::is_primitive(mirror)) { 1049 return JNI_FALSE; 1050 } 1051 Klass* k = java_lang_Class::as_Klass(mirror); 1052 jboolean result = k->is_interface(); 1053 assert(!result || k->oop_is_instance(), 1054 "all interfaces are instance types"); 1055 // The compiler intrinsic for isInterface tests the 1056 // Klass::_access_flags bits in the same way. 1057 return result; 1058 JVM_END 1059 1060 1061 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1062 JVMWrapper("JVM_GetClassSigners"); 1063 JvmtiVMObjectAllocEventCollector oam; 1064 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1065 // There are no signers for primitive types 1066 return NULL; 1067 } 1068 1069 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1070 1071 // If there are no signers set in the class, or if the class 1072 // is an array, return NULL. 1073 if (signers == NULL) return NULL; 1074 1075 // copy of the signers array 1076 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1077 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1078 for (int index = 0; index < signers->length(); index++) { 1079 signers_copy->obj_at_put(index, signers->obj_at(index)); 1080 } 1081 1082 // return the copy 1083 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1084 JVM_END 1085 1086 1087 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1088 JVMWrapper("JVM_SetClassSigners"); 1089 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1090 // This call is ignored for primitive types and arrays. 1091 // Signers are only set once, ClassLoader.java, and thus shouldn't 1092 // be called with an array. Only the bootstrap loader creates arrays. 1093 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1094 if (k->oop_is_instance()) { 1095 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1096 } 1097 } 1098 JVM_END 1099 1100 1101 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1102 JVMWrapper("JVM_GetProtectionDomain"); 1103 if (JNIHandles::resolve(cls) == NULL) { 1104 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1105 } 1106 1107 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1108 // Primitive types does not have a protection domain. 1109 return NULL; 1110 } 1111 1112 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1113 return (jobject) JNIHandles::make_local(env, pd); 1114 JVM_END 1115 1116 1117 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { 1118 // If there is a security manager and protection domain, check the access 1119 // in the protection domain, otherwise it is authorized. 1120 if (java_lang_System::has_security_manager()) { 1121 1122 // For bootstrapping, if pd implies method isn't in the JDK, allow 1123 // this context to revert to older behavior. 1124 // In this case the isAuthorized field in AccessControlContext is also not 1125 // present. 1126 if (Universe::protection_domain_implies_method() == NULL) { 1127 return true; 1128 } 1129 1130 // Whitelist certain access control contexts 1131 if (java_security_AccessControlContext::is_authorized(context)) { 1132 return true; 1133 } 1134 1135 oop prot = klass->protection_domain(); 1136 if (prot != NULL) { 1137 // Call pd.implies(new SecurityPermission("createAccessControlContext")) 1138 // in the new wrapper. 1139 methodHandle m(THREAD, Universe::protection_domain_implies_method()); 1140 Handle h_prot(THREAD, prot); 1141 JavaValue result(T_BOOLEAN); 1142 JavaCallArguments args(h_prot); 1143 JavaCalls::call(&result, m, &args, CHECK_false); 1144 return (result.get_jboolean() != 0); 1145 } 1146 } 1147 return true; 1148 } 1149 1150 // Create an AccessControlContext with a protection domain with null codesource 1151 // and null permissions - which gives no permissions. 1152 oop create_dummy_access_control_context(TRAPS) { 1153 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); 1154 // new ProtectionDomain(null,null); 1155 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); 1156 Handle null_pd(THREAD, null_protection_domain); 1157 1158 // new ProtectionDomain[] {pd}; 1159 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1160 context->obj_at_put(0, null_pd()); 1161 1162 // new AccessControlContext(new ProtectionDomain[] {pd}) 1163 objArrayHandle h_context(THREAD, context); 1164 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1165 return result; 1166 } 1167 1168 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1169 JVMWrapper("JVM_DoPrivileged"); 1170 1171 if (action == NULL) { 1172 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1173 } 1174 1175 // Compute the frame initiating the do privileged operation and setup the privileged stack 1176 vframeStream vfst(thread); 1177 vfst.security_get_caller_frame(1); 1178 1179 if (vfst.at_end()) { 1180 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1181 } 1182 1183 Method* method = vfst.method(); 1184 instanceKlassHandle klass (THREAD, method->method_holder()); 1185 1186 // Check that action object understands "Object run()" 1187 Handle h_context; 1188 if (context != NULL) { 1189 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1190 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1191 if (!authorized) { 1192 // Create an unprivileged access control object and call it's run function 1193 // instead. 1194 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1195 h_context = Handle(THREAD, noprivs); 1196 } 1197 } 1198 1199 // Check that action object understands "Object run()" 1200 Handle object (THREAD, JNIHandles::resolve(action)); 1201 1202 // get run() method 1203 Method* m_oop = object->klass()->uncached_lookup_method( 1204 vmSymbols::run_method_name(), 1205 vmSymbols::void_object_signature()); 1206 methodHandle m (THREAD, m_oop); 1207 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1208 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1209 } 1210 1211 // Stack allocated list of privileged stack elements 1212 PrivilegedElement pi; 1213 if (!vfst.at_end()) { 1214 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1215 thread->set_privileged_stack_top(&pi); 1216 } 1217 1218 1219 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1220 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1221 Handle pending_exception; 1222 JavaValue result(T_OBJECT); 1223 JavaCallArguments args(object); 1224 JavaCalls::call(&result, m, &args, THREAD); 1225 1226 // done with action, remove ourselves from the list 1227 if (!vfst.at_end()) { 1228 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1229 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1230 } 1231 1232 if (HAS_PENDING_EXCEPTION) { 1233 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1234 CLEAR_PENDING_EXCEPTION; 1235 1236 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1237 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1238 // Throw a java.security.PrivilegedActionException(Exception e) exception 1239 JavaCallArguments args(pending_exception); 1240 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1241 vmSymbols::exception_void_signature(), 1242 &args); 1243 } 1244 } 1245 1246 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1247 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1248 JVM_END 1249 1250 1251 // Returns the inherited_access_control_context field of the running thread. 1252 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1253 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1254 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1255 return JNIHandles::make_local(env, result); 1256 JVM_END 1257 1258 class RegisterArrayForGC { 1259 private: 1260 JavaThread *_thread; 1261 public: 1262 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1263 _thread = thread; 1264 _thread->register_array_for_gc(array); 1265 } 1266 1267 ~RegisterArrayForGC() { 1268 _thread->register_array_for_gc(NULL); 1269 } 1270 }; 1271 1272 1273 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1274 JVMWrapper("JVM_GetStackAccessControlContext"); 1275 if (!UsePrivilegedStack) return NULL; 1276 1277 ResourceMark rm(THREAD); 1278 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1279 JvmtiVMObjectAllocEventCollector oam; 1280 1281 // count the protection domains on the execution stack. We collapse 1282 // duplicate consecutive protection domains into a single one, as 1283 // well as stopping when we hit a privileged frame. 1284 1285 // Use vframeStream to iterate through Java frames 1286 vframeStream vfst(thread); 1287 1288 oop previous_protection_domain = NULL; 1289 Handle privileged_context(thread, NULL); 1290 bool is_privileged = false; 1291 oop protection_domain = NULL; 1292 1293 for(; !vfst.at_end(); vfst.next()) { 1294 // get method of frame 1295 Method* method = vfst.method(); 1296 intptr_t* frame_id = vfst.frame_id(); 1297 1298 // check the privileged frames to see if we have a match 1299 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1300 // this frame is privileged 1301 is_privileged = true; 1302 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1303 protection_domain = thread->privileged_stack_top()->protection_domain(); 1304 } else { 1305 protection_domain = method->method_holder()->protection_domain(); 1306 } 1307 1308 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1309 local_array->push(protection_domain); 1310 previous_protection_domain = protection_domain; 1311 } 1312 1313 if (is_privileged) break; 1314 } 1315 1316 1317 // either all the domains on the stack were system domains, or 1318 // we had a privileged system domain 1319 if (local_array->is_empty()) { 1320 if (is_privileged && privileged_context.is_null()) return NULL; 1321 1322 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1323 return JNIHandles::make_local(env, result); 1324 } 1325 1326 // the resource area must be registered in case of a gc 1327 RegisterArrayForGC ragc(thread, local_array); 1328 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1329 local_array->length(), CHECK_NULL); 1330 objArrayHandle h_context(thread, context); 1331 for (int index = 0; index < local_array->length(); index++) { 1332 h_context->obj_at_put(index, local_array->at(index)); 1333 } 1334 1335 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1336 1337 return JNIHandles::make_local(env, result); 1338 JVM_END 1339 1340 1341 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1342 JVMWrapper("JVM_IsArrayClass"); 1343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1344 return (k != NULL) && k->oop_is_array() ? true : false; 1345 JVM_END 1346 1347 1348 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1349 JVMWrapper("JVM_IsPrimitiveClass"); 1350 oop mirror = JNIHandles::resolve_non_null(cls); 1351 return (jboolean) java_lang_Class::is_primitive(mirror); 1352 JVM_END 1353 1354 1355 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1356 JVMWrapper("JVM_GetComponentType"); 1357 oop mirror = JNIHandles::resolve_non_null(cls); 1358 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1359 return (jclass) JNIHandles::make_local(env, result); 1360 JVM_END 1361 1362 1363 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1364 JVMWrapper("JVM_GetClassModifiers"); 1365 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1366 // Primitive type 1367 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1368 } 1369 1370 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1371 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1372 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1373 return k->modifier_flags(); 1374 JVM_END 1375 1376 1377 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1378 1379 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1380 JvmtiVMObjectAllocEventCollector oam; 1381 // ofClass is a reference to a java_lang_Class object. The mirror object 1382 // of an InstanceKlass 1383 1384 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1385 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1386 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1387 return (jobjectArray)JNIHandles::make_local(env, result); 1388 } 1389 1390 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1391 InnerClassesIterator iter(k); 1392 1393 if (iter.length() == 0) { 1394 // Neither an inner nor outer class 1395 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1396 return (jobjectArray)JNIHandles::make_local(env, result); 1397 } 1398 1399 // find inner class info 1400 constantPoolHandle cp(thread, k->constants()); 1401 int length = iter.length(); 1402 1403 // Allocate temp. result array 1404 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1405 objArrayHandle result (THREAD, r); 1406 int members = 0; 1407 1408 for (; !iter.done(); iter.next()) { 1409 int ioff = iter.inner_class_info_index(); 1410 int ooff = iter.outer_class_info_index(); 1411 1412 if (ioff != 0 && ooff != 0) { 1413 // Check to see if the name matches the class we're looking for 1414 // before attempting to find the class. 1415 if (cp->klass_name_at_matches(k, ooff)) { 1416 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1417 if (outer_klass == k()) { 1418 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1419 instanceKlassHandle inner_klass (THREAD, ik); 1420 1421 // Throws an exception if outer klass has not declared k as 1422 // an inner klass 1423 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1424 1425 result->obj_at_put(members, inner_klass->java_mirror()); 1426 members++; 1427 } 1428 } 1429 } 1430 } 1431 1432 if (members != length) { 1433 // Return array of right length 1434 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1435 for(int i = 0; i < members; i++) { 1436 res->obj_at_put(i, result->obj_at(i)); 1437 } 1438 return (jobjectArray)JNIHandles::make_local(env, res); 1439 } 1440 1441 return (jobjectArray)JNIHandles::make_local(env, result()); 1442 JVM_END 1443 1444 1445 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1446 { 1447 // ofClass is a reference to a java_lang_Class object. 1448 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1449 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1450 return NULL; 1451 } 1452 1453 bool inner_is_member = false; 1454 Klass* outer_klass 1455 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1456 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1457 if (outer_klass == NULL) return NULL; // already a top-level class 1458 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1459 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1460 } 1461 JVM_END 1462 1463 // should be in InstanceKlass.cpp, but is here for historical reasons 1464 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1465 bool* inner_is_member, 1466 TRAPS) { 1467 Thread* thread = THREAD; 1468 InnerClassesIterator iter(k); 1469 if (iter.length() == 0) { 1470 // No inner class info => no declaring class 1471 return NULL; 1472 } 1473 1474 constantPoolHandle i_cp(thread, k->constants()); 1475 1476 bool found = false; 1477 Klass* ok; 1478 instanceKlassHandle outer_klass; 1479 *inner_is_member = false; 1480 1481 // Find inner_klass attribute 1482 for (; !iter.done() && !found; iter.next()) { 1483 int ioff = iter.inner_class_info_index(); 1484 int ooff = iter.outer_class_info_index(); 1485 int noff = iter.inner_name_index(); 1486 if (ioff != 0) { 1487 // Check to see if the name matches the class we're looking for 1488 // before attempting to find the class. 1489 if (i_cp->klass_name_at_matches(k, ioff)) { 1490 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1491 found = (k() == inner_klass); 1492 if (found && ooff != 0) { 1493 ok = i_cp->klass_at(ooff, CHECK_NULL); 1494 outer_klass = instanceKlassHandle(thread, ok); 1495 *inner_is_member = true; 1496 } 1497 } 1498 } 1499 } 1500 1501 if (found && outer_klass.is_null()) { 1502 // It may be anonymous; try for that. 1503 int encl_method_class_idx = k->enclosing_method_class_index(); 1504 if (encl_method_class_idx != 0) { 1505 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1506 outer_klass = instanceKlassHandle(thread, ok); 1507 *inner_is_member = false; 1508 } 1509 } 1510 1511 // If no inner class attribute found for this class. 1512 if (outer_klass.is_null()) return NULL; 1513 1514 // Throws an exception if outer klass has not declared k as an inner klass 1515 // We need evidence that each klass knows about the other, or else 1516 // the system could allow a spoof of an inner class to gain access rights. 1517 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1518 return outer_klass(); 1519 } 1520 1521 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1522 assert (cls != NULL, "illegal class"); 1523 JVMWrapper("JVM_GetClassSignature"); 1524 JvmtiVMObjectAllocEventCollector oam; 1525 ResourceMark rm(THREAD); 1526 // Return null for arrays and primatives 1527 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1529 if (k->oop_is_instance()) { 1530 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1531 if (sym == NULL) return NULL; 1532 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1533 return (jstring) JNIHandles::make_local(env, str()); 1534 } 1535 } 1536 return NULL; 1537 JVM_END 1538 1539 1540 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1541 assert (cls != NULL, "illegal class"); 1542 JVMWrapper("JVM_GetClassAnnotations"); 1543 1544 // Return null for arrays and primitives 1545 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1547 if (k->oop_is_instance()) { 1548 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1549 return (jbyteArray) JNIHandles::make_local(env, a); 1550 } 1551 } 1552 return NULL; 1553 JVM_END 1554 1555 1556 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1557 // some of this code was adapted from from jni_FromReflectedField 1558 1559 oop reflected = JNIHandles::resolve_non_null(field); 1560 oop mirror = java_lang_reflect_Field::clazz(reflected); 1561 Klass* k = java_lang_Class::as_Klass(mirror); 1562 int slot = java_lang_reflect_Field::slot(reflected); 1563 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1564 1565 KlassHandle kh(THREAD, k); 1566 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1567 1568 if (modifiers & JVM_ACC_STATIC) { 1569 // for static fields we only look in the current class 1570 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1571 assert(false, "cannot find static field"); 1572 return false; 1573 } 1574 } else { 1575 // for instance fields we start with the current class and work 1576 // our way up through the superclass chain 1577 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1578 assert(false, "cannot find instance field"); 1579 return false; 1580 } 1581 } 1582 return true; 1583 } 1584 1585 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1586 // field is a handle to a java.lang.reflect.Field object 1587 assert(field != NULL, "illegal field"); 1588 JVMWrapper("JVM_GetFieldAnnotations"); 1589 1590 fieldDescriptor fd; 1591 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1592 if (!gotFd) { 1593 return NULL; 1594 } 1595 1596 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1597 JVM_END 1598 1599 1600 static Method* jvm_get_method_common(jobject method) { 1601 // some of this code was adapted from from jni_FromReflectedMethod 1602 1603 oop reflected = JNIHandles::resolve_non_null(method); 1604 oop mirror = NULL; 1605 int slot = 0; 1606 1607 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1608 mirror = java_lang_reflect_Constructor::clazz(reflected); 1609 slot = java_lang_reflect_Constructor::slot(reflected); 1610 } else { 1611 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1612 "wrong type"); 1613 mirror = java_lang_reflect_Method::clazz(reflected); 1614 slot = java_lang_reflect_Method::slot(reflected); 1615 } 1616 Klass* k = java_lang_Class::as_Klass(mirror); 1617 1618 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1619 assert(m != NULL, "cannot find method"); 1620 return m; // caller has to deal with NULL in product mode 1621 } 1622 1623 1624 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1625 JVMWrapper("JVM_GetMethodAnnotations"); 1626 1627 // method is a handle to a java.lang.reflect.Method object 1628 Method* m = jvm_get_method_common(method); 1629 if (m == NULL) { 1630 return NULL; 1631 } 1632 1633 return (jbyteArray) JNIHandles::make_local(env, 1634 Annotations::make_java_array(m->annotations(), THREAD)); 1635 JVM_END 1636 1637 1638 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1639 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1640 1641 // method is a handle to a java.lang.reflect.Method object 1642 Method* m = jvm_get_method_common(method); 1643 if (m == NULL) { 1644 return NULL; 1645 } 1646 1647 return (jbyteArray) JNIHandles::make_local(env, 1648 Annotations::make_java_array(m->annotation_default(), THREAD)); 1649 JVM_END 1650 1651 1652 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1653 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1654 1655 // method is a handle to a java.lang.reflect.Method object 1656 Method* m = jvm_get_method_common(method); 1657 if (m == NULL) { 1658 return NULL; 1659 } 1660 1661 return (jbyteArray) JNIHandles::make_local(env, 1662 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1663 JVM_END 1664 1665 /* Type use annotations support (JDK 1.8) */ 1666 1667 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1668 assert (cls != NULL, "illegal class"); 1669 JVMWrapper("JVM_GetClassTypeAnnotations"); 1670 ResourceMark rm(THREAD); 1671 // Return null for arrays and primitives 1672 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1673 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1674 if (k->oop_is_instance()) { 1675 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1676 if (type_annotations != NULL) { 1677 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1678 return (jbyteArray) JNIHandles::make_local(env, a); 1679 } 1680 } 1681 } 1682 return NULL; 1683 JVM_END 1684 1685 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1686 assert (method != NULL, "illegal method"); 1687 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1688 1689 // method is a handle to a java.lang.reflect.Method object 1690 Method* m = jvm_get_method_common(method); 1691 if (m == NULL) { 1692 return NULL; 1693 } 1694 1695 AnnotationArray* type_annotations = m->type_annotations(); 1696 if (type_annotations != NULL) { 1697 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1698 return (jbyteArray) JNIHandles::make_local(env, a); 1699 } 1700 1701 return NULL; 1702 JVM_END 1703 1704 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1705 assert (field != NULL, "illegal field"); 1706 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1707 1708 fieldDescriptor fd; 1709 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1710 if (!gotFd) { 1711 return NULL; 1712 } 1713 1714 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1715 JVM_END 1716 1717 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1718 if (!cp->is_within_bounds(index)) { 1719 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1720 } 1721 } 1722 1723 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1724 { 1725 JVMWrapper("JVM_GetMethodParameters"); 1726 // method is a handle to a java.lang.reflect.Method object 1727 Method* method_ptr = jvm_get_method_common(method); 1728 methodHandle mh (THREAD, method_ptr); 1729 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1730 const int num_params = mh->method_parameters_length(); 1731 1732 if (0 != num_params) { 1733 // make sure all the symbols are properly formatted 1734 for (int i = 0; i < num_params; i++) { 1735 MethodParametersElement* params = mh->method_parameters_start(); 1736 int index = params[i].name_cp_index; 1737 bounds_check(mh->constants(), index, CHECK_NULL); 1738 1739 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1740 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1741 "Wrong type at constant pool index"); 1742 } 1743 1744 } 1745 1746 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1747 objArrayHandle result (THREAD, result_oop); 1748 1749 for (int i = 0; i < num_params; i++) { 1750 MethodParametersElement* params = mh->method_parameters_start(); 1751 // For a 0 index, give a NULL symbol 1752 Symbol* sym = 0 != params[i].name_cp_index ? 1753 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1754 int flags = params[i].flags; 1755 oop param = Reflection::new_parameter(reflected_method, i, sym, 1756 flags, CHECK_NULL); 1757 result->obj_at_put(i, param); 1758 } 1759 return (jobjectArray)JNIHandles::make_local(env, result()); 1760 } else { 1761 return (jobjectArray)NULL; 1762 } 1763 } 1764 JVM_END 1765 1766 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1767 1768 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1769 { 1770 JVMWrapper("JVM_GetClassDeclaredFields"); 1771 JvmtiVMObjectAllocEventCollector oam; 1772 1773 // Exclude primitive types and array types 1774 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1775 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1776 // Return empty array 1777 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1778 return (jobjectArray) JNIHandles::make_local(env, res); 1779 } 1780 1781 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1782 constantPoolHandle cp(THREAD, k->constants()); 1783 1784 // Ensure class is linked 1785 k->link_class(CHECK_NULL); 1786 1787 // 4496456 We need to filter out java.lang.Throwable.backtrace 1788 bool skip_backtrace = false; 1789 1790 // Allocate result 1791 int num_fields; 1792 1793 if (publicOnly) { 1794 num_fields = 0; 1795 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1796 if (fs.access_flags().is_public()) ++num_fields; 1797 } 1798 } else { 1799 num_fields = k->java_fields_count(); 1800 1801 if (k() == SystemDictionary::Throwable_klass()) { 1802 num_fields--; 1803 skip_backtrace = true; 1804 } 1805 } 1806 1807 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1808 objArrayHandle result (THREAD, r); 1809 1810 int out_idx = 0; 1811 fieldDescriptor fd; 1812 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1813 if (skip_backtrace) { 1814 // 4496456 skip java.lang.Throwable.backtrace 1815 int offset = fs.offset(); 1816 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1817 } 1818 1819 if (!publicOnly || fs.access_flags().is_public()) { 1820 fd.reinitialize(k(), fs.index()); 1821 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1822 result->obj_at_put(out_idx, field); 1823 ++out_idx; 1824 } 1825 } 1826 assert(out_idx == num_fields, "just checking"); 1827 return (jobjectArray) JNIHandles::make_local(env, result()); 1828 } 1829 JVM_END 1830 1831 static bool select_method(methodHandle method, bool want_constructor) { 1832 if (want_constructor) { 1833 return (method->is_initializer() && !method->is_static()); 1834 } else { 1835 return (!method->is_initializer() && !method->is_overpass()); 1836 } 1837 } 1838 1839 static jobjectArray get_class_declared_methods_helper( 1840 JNIEnv *env, 1841 jclass ofClass, jboolean publicOnly, 1842 bool want_constructor, 1843 Klass* klass, TRAPS) { 1844 1845 JvmtiVMObjectAllocEventCollector oam; 1846 1847 // Exclude primitive types and array types 1848 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1849 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1850 // Return empty array 1851 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1852 return (jobjectArray) JNIHandles::make_local(env, res); 1853 } 1854 1855 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1856 1857 // Ensure class is linked 1858 k->link_class(CHECK_NULL); 1859 1860 Array<Method*>* methods = k->methods(); 1861 int methods_length = methods->length(); 1862 1863 // Save original method_idnum in case of redefinition, which can change 1864 // the idnum of obsolete methods. The new method will have the same idnum 1865 // but if we refresh the methods array, the counts will be wrong. 1866 ResourceMark rm(THREAD); 1867 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1868 int num_methods = 0; 1869 1870 for (int i = 0; i < methods_length; i++) { 1871 methodHandle method(THREAD, methods->at(i)); 1872 if (select_method(method, want_constructor)) { 1873 if (!publicOnly || method->is_public()) { 1874 idnums->push(method->method_idnum()); 1875 ++num_methods; 1876 } 1877 } 1878 } 1879 1880 // Allocate result 1881 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1882 objArrayHandle result (THREAD, r); 1883 1884 // Now just put the methods that we selected above, but go by their idnum 1885 // in case of redefinition. The methods can be redefined at any safepoint, 1886 // so above when allocating the oop array and below when creating reflect 1887 // objects. 1888 for (int i = 0; i < num_methods; i++) { 1889 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1890 if (method.is_null()) { 1891 // Method may have been deleted and seems this API can handle null 1892 // Otherwise should probably put a method that throws NSME 1893 result->obj_at_put(i, NULL); 1894 } else { 1895 oop m; 1896 if (want_constructor) { 1897 m = Reflection::new_constructor(method, CHECK_NULL); 1898 } else { 1899 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1900 } 1901 result->obj_at_put(i, m); 1902 } 1903 } 1904 1905 return (jobjectArray) JNIHandles::make_local(env, result()); 1906 } 1907 1908 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1909 { 1910 JVMWrapper("JVM_GetClassDeclaredMethods"); 1911 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1912 /*want_constructor*/ false, 1913 SystemDictionary::reflect_Method_klass(), THREAD); 1914 } 1915 JVM_END 1916 1917 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1918 { 1919 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1920 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1921 /*want_constructor*/ true, 1922 SystemDictionary::reflect_Constructor_klass(), THREAD); 1923 } 1924 JVM_END 1925 1926 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1927 { 1928 JVMWrapper("JVM_GetClassAccessFlags"); 1929 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1930 // Primitive type 1931 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1932 } 1933 1934 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1935 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1936 } 1937 JVM_END 1938 1939 1940 // Constant pool access ////////////////////////////////////////////////////////// 1941 1942 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1943 { 1944 JVMWrapper("JVM_GetClassConstantPool"); 1945 JvmtiVMObjectAllocEventCollector oam; 1946 1947 // Return null for primitives and arrays 1948 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1949 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1950 if (k->oop_is_instance()) { 1951 instanceKlassHandle k_h(THREAD, k); 1952 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1953 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1954 return JNIHandles::make_local(jcp()); 1955 } 1956 } 1957 return NULL; 1958 } 1959 JVM_END 1960 1961 1962 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1963 { 1964 JVMWrapper("JVM_ConstantPoolGetSize"); 1965 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1966 return cp->length(); 1967 } 1968 JVM_END 1969 1970 1971 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1972 { 1973 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1974 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1975 bounds_check(cp, index, CHECK_NULL); 1976 constantTag tag = cp->tag_at(index); 1977 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1978 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1979 } 1980 Klass* k = cp->klass_at(index, CHECK_NULL); 1981 return (jclass) JNIHandles::make_local(k->java_mirror()); 1982 } 1983 JVM_END 1984 1985 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1986 { 1987 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1988 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1989 bounds_check(cp, index, CHECK_NULL); 1990 constantTag tag = cp->tag_at(index); 1991 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1992 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1993 } 1994 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 1995 if (k == NULL) return NULL; 1996 return (jclass) JNIHandles::make_local(k->java_mirror()); 1997 } 1998 JVM_END 1999 2000 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2001 constantTag tag = cp->tag_at(index); 2002 if (!tag.is_method() && !tag.is_interface_method()) { 2003 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2004 } 2005 int klass_ref = cp->uncached_klass_ref_index_at(index); 2006 Klass* k_o; 2007 if (force_resolution) { 2008 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2009 } else { 2010 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2011 if (k_o == NULL) return NULL; 2012 } 2013 instanceKlassHandle k(THREAD, k_o); 2014 Symbol* name = cp->uncached_name_ref_at(index); 2015 Symbol* sig = cp->uncached_signature_ref_at(index); 2016 methodHandle m (THREAD, k->find_method(name, sig)); 2017 if (m.is_null()) { 2018 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2019 } 2020 oop method; 2021 if (!m->is_initializer() || m->is_static()) { 2022 method = Reflection::new_method(m, true, true, CHECK_NULL); 2023 } else { 2024 method = Reflection::new_constructor(m, CHECK_NULL); 2025 } 2026 return JNIHandles::make_local(method); 2027 } 2028 2029 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2030 { 2031 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2032 JvmtiVMObjectAllocEventCollector oam; 2033 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2034 bounds_check(cp, index, CHECK_NULL); 2035 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2036 return res; 2037 } 2038 JVM_END 2039 2040 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2041 { 2042 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2043 JvmtiVMObjectAllocEventCollector oam; 2044 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2045 bounds_check(cp, index, CHECK_NULL); 2046 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2047 return res; 2048 } 2049 JVM_END 2050 2051 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2052 constantTag tag = cp->tag_at(index); 2053 if (!tag.is_field()) { 2054 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2055 } 2056 int klass_ref = cp->uncached_klass_ref_index_at(index); 2057 Klass* k_o; 2058 if (force_resolution) { 2059 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2060 } else { 2061 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2062 if (k_o == NULL) return NULL; 2063 } 2064 instanceKlassHandle k(THREAD, k_o); 2065 Symbol* name = cp->uncached_name_ref_at(index); 2066 Symbol* sig = cp->uncached_signature_ref_at(index); 2067 fieldDescriptor fd; 2068 Klass* target_klass = k->find_field(name, sig, &fd); 2069 if (target_klass == NULL) { 2070 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2071 } 2072 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2073 return JNIHandles::make_local(field); 2074 } 2075 2076 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2077 { 2078 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2079 JvmtiVMObjectAllocEventCollector oam; 2080 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2081 bounds_check(cp, index, CHECK_NULL); 2082 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2083 return res; 2084 } 2085 JVM_END 2086 2087 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2088 { 2089 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2090 JvmtiVMObjectAllocEventCollector oam; 2091 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2092 bounds_check(cp, index, CHECK_NULL); 2093 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2094 return res; 2095 } 2096 JVM_END 2097 2098 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2099 { 2100 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2101 JvmtiVMObjectAllocEventCollector oam; 2102 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2103 bounds_check(cp, index, CHECK_NULL); 2104 constantTag tag = cp->tag_at(index); 2105 if (!tag.is_field_or_method()) { 2106 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2107 } 2108 int klass_ref = cp->uncached_klass_ref_index_at(index); 2109 Symbol* klass_name = cp->klass_name_at(klass_ref); 2110 Symbol* member_name = cp->uncached_name_ref_at(index); 2111 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2112 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2113 objArrayHandle dest(THREAD, dest_o); 2114 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2115 dest->obj_at_put(0, str()); 2116 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2117 dest->obj_at_put(1, str()); 2118 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2119 dest->obj_at_put(2, str()); 2120 return (jobjectArray) JNIHandles::make_local(dest()); 2121 } 2122 JVM_END 2123 2124 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2125 { 2126 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2127 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2128 bounds_check(cp, index, CHECK_0); 2129 constantTag tag = cp->tag_at(index); 2130 if (!tag.is_int()) { 2131 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2132 } 2133 return cp->int_at(index); 2134 } 2135 JVM_END 2136 2137 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2138 { 2139 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2140 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2141 bounds_check(cp, index, CHECK_(0L)); 2142 constantTag tag = cp->tag_at(index); 2143 if (!tag.is_long()) { 2144 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2145 } 2146 return cp->long_at(index); 2147 } 2148 JVM_END 2149 2150 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2151 { 2152 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2153 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2154 bounds_check(cp, index, CHECK_(0.0f)); 2155 constantTag tag = cp->tag_at(index); 2156 if (!tag.is_float()) { 2157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2158 } 2159 return cp->float_at(index); 2160 } 2161 JVM_END 2162 2163 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2164 { 2165 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2166 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2167 bounds_check(cp, index, CHECK_(0.0)); 2168 constantTag tag = cp->tag_at(index); 2169 if (!tag.is_double()) { 2170 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2171 } 2172 return cp->double_at(index); 2173 } 2174 JVM_END 2175 2176 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2177 { 2178 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2179 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2180 bounds_check(cp, index, CHECK_NULL); 2181 constantTag tag = cp->tag_at(index); 2182 if (!tag.is_string()) { 2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2184 } 2185 oop str = cp->string_at(index, CHECK_NULL); 2186 return (jstring) JNIHandles::make_local(str); 2187 } 2188 JVM_END 2189 2190 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2191 { 2192 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2193 JvmtiVMObjectAllocEventCollector oam; 2194 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2195 bounds_check(cp, index, CHECK_NULL); 2196 constantTag tag = cp->tag_at(index); 2197 if (!tag.is_symbol()) { 2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2199 } 2200 Symbol* sym = cp->symbol_at(index); 2201 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2202 return (jstring) JNIHandles::make_local(str()); 2203 } 2204 JVM_END 2205 2206 2207 // Assertion support. ////////////////////////////////////////////////////////// 2208 2209 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2210 JVMWrapper("JVM_DesiredAssertionStatus"); 2211 assert(cls != NULL, "bad class"); 2212 2213 oop r = JNIHandles::resolve(cls); 2214 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2215 if (java_lang_Class::is_primitive(r)) return false; 2216 2217 Klass* k = java_lang_Class::as_Klass(r); 2218 assert(k->oop_is_instance(), "must be an instance klass"); 2219 if (! k->oop_is_instance()) return false; 2220 2221 ResourceMark rm(THREAD); 2222 const char* name = k->name()->as_C_string(); 2223 bool system_class = k->class_loader() == NULL; 2224 return JavaAssertions::enabled(name, system_class); 2225 2226 JVM_END 2227 2228 2229 // Return a new AssertionStatusDirectives object with the fields filled in with 2230 // command-line assertion arguments (i.e., -ea, -da). 2231 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2232 JVMWrapper("JVM_AssertionStatusDirectives"); 2233 JvmtiVMObjectAllocEventCollector oam; 2234 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2235 return JNIHandles::make_local(env, asd); 2236 JVM_END 2237 2238 // Verification //////////////////////////////////////////////////////////////////////////////// 2239 2240 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2241 2242 // RedefineClasses support: bug 6214132 caused verification to fail. 2243 // All functions from this section should call the jvmtiThreadSate function: 2244 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2245 // The function returns a Klass* of the _scratch_class if the verifier 2246 // was invoked in the middle of the class redefinition. 2247 // Otherwise it returns its argument value which is the _the_class Klass*. 2248 // Please, refer to the description in the jvmtiThreadSate.hpp. 2249 2250 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2251 JVMWrapper("JVM_GetClassNameUTF"); 2252 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2253 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2254 return k->name()->as_utf8(); 2255 JVM_END 2256 2257 2258 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2259 JVMWrapper("JVM_GetClassCPTypes"); 2260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2261 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2262 // types will have length zero if this is not an InstanceKlass 2263 // (length is determined by call to JVM_GetClassCPEntriesCount) 2264 if (k->oop_is_instance()) { 2265 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2266 for (int index = cp->length() - 1; index >= 0; index--) { 2267 constantTag tag = cp->tag_at(index); 2268 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2269 } 2270 } 2271 JVM_END 2272 2273 2274 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2275 JVMWrapper("JVM_GetClassCPEntriesCount"); 2276 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2278 if (!k->oop_is_instance()) 2279 return 0; 2280 return InstanceKlass::cast(k)->constants()->length(); 2281 JVM_END 2282 2283 2284 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2285 JVMWrapper("JVM_GetClassFieldsCount"); 2286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2287 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2288 if (!k->oop_is_instance()) 2289 return 0; 2290 return InstanceKlass::cast(k)->java_fields_count(); 2291 JVM_END 2292 2293 2294 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2295 JVMWrapper("JVM_GetClassMethodsCount"); 2296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2298 if (!k->oop_is_instance()) 2299 return 0; 2300 return InstanceKlass::cast(k)->methods()->length(); 2301 JVM_END 2302 2303 2304 // The following methods, used for the verifier, are never called with 2305 // array klasses, so a direct cast to InstanceKlass is safe. 2306 // Typically, these methods are called in a loop with bounds determined 2307 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2308 // zero for arrays. 2309 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2310 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2313 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2314 int length = method->checked_exceptions_length(); 2315 if (length > 0) { 2316 CheckedExceptionElement* table= method->checked_exceptions_start(); 2317 for (int i = 0; i < length; i++) { 2318 exceptions[i] = table[i].class_cp_index; 2319 } 2320 } 2321 JVM_END 2322 2323 2324 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2325 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2326 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2327 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2328 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2329 return method->checked_exceptions_length(); 2330 JVM_END 2331 2332 2333 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2334 JVMWrapper("JVM_GetMethodIxByteCode"); 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 memcpy(code, method->code_base(), method->code_size()); 2339 JVM_END 2340 2341 2342 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2343 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2344 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2345 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2346 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2347 return method->code_size(); 2348 JVM_END 2349 2350 2351 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2352 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 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 ExceptionTable extable(method); 2357 entry->start_pc = extable.start_pc(entry_index); 2358 entry->end_pc = extable.end_pc(entry_index); 2359 entry->handler_pc = extable.handler_pc(entry_index); 2360 entry->catchType = extable.catch_type_index(entry_index); 2361 JVM_END 2362 2363 2364 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2365 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2366 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2367 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2368 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2369 return method->exception_table_length(); 2370 JVM_END 2371 2372 2373 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2374 JVMWrapper("JVM_GetMethodIxModifiers"); 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->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2379 JVM_END 2380 2381 2382 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2383 JVMWrapper("JVM_GetFieldIxModifiers"); 2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2386 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2387 JVM_END 2388 2389 2390 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2391 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2395 return method->max_locals(); 2396 JVM_END 2397 2398 2399 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2400 JVMWrapper("JVM_GetMethodIxArgsSize"); 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->size_of_parameters(); 2405 JVM_END 2406 2407 2408 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2409 JVMWrapper("JVM_GetMethodIxMaxStack"); 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->verifier_max_stack(); 2414 JVM_END 2415 2416 2417 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2418 JVMWrapper("JVM_IsConstructorIx"); 2419 ResourceMark rm(THREAD); 2420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2421 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2422 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2423 return method->name() == vmSymbols::object_initializer_name(); 2424 JVM_END 2425 2426 2427 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2428 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2429 ResourceMark rm(THREAD); 2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2432 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2433 return method->is_overpass(); 2434 JVM_END 2435 2436 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2437 JVMWrapper("JVM_GetMethodIxIxUTF"); 2438 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2439 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2440 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2441 return method->name()->as_utf8(); 2442 JVM_END 2443 2444 2445 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2446 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 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->signature()->as_utf8(); 2451 JVM_END 2452 2453 /** 2454 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2455 * read entries in the constant pool. Since the old verifier always 2456 * works on a copy of the code, it will not see any rewriting that 2457 * may possibly occur in the middle of verification. So it is important 2458 * that nothing it calls tries to use the cpCache instead of the raw 2459 * constant pool, so we must use cp->uncached_x methods when appropriate. 2460 */ 2461 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2462 JVMWrapper("JVM_GetCPFieldNameUTF"); 2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2465 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2466 switch (cp->tag_at(cp_index).value()) { 2467 case JVM_CONSTANT_Fieldref: 2468 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2469 default: 2470 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2471 } 2472 ShouldNotReachHere(); 2473 return NULL; 2474 JVM_END 2475 2476 2477 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2478 JVMWrapper("JVM_GetCPMethodNameUTF"); 2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2481 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2482 switch (cp->tag_at(cp_index).value()) { 2483 case JVM_CONSTANT_InterfaceMethodref: 2484 case JVM_CONSTANT_Methodref: 2485 case JVM_CONSTANT_NameAndType: // for invokedynamic 2486 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2487 default: 2488 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2489 } 2490 ShouldNotReachHere(); 2491 return NULL; 2492 JVM_END 2493 2494 2495 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2496 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2499 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2500 switch (cp->tag_at(cp_index).value()) { 2501 case JVM_CONSTANT_InterfaceMethodref: 2502 case JVM_CONSTANT_Methodref: 2503 case JVM_CONSTANT_NameAndType: // for invokedynamic 2504 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2505 default: 2506 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2507 } 2508 ShouldNotReachHere(); 2509 return NULL; 2510 JVM_END 2511 2512 2513 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2514 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2517 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2518 switch (cp->tag_at(cp_index).value()) { 2519 case JVM_CONSTANT_Fieldref: 2520 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2521 default: 2522 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2523 } 2524 ShouldNotReachHere(); 2525 return NULL; 2526 JVM_END 2527 2528 2529 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2530 JVMWrapper("JVM_GetCPClassNameUTF"); 2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2533 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2534 Symbol* classname = cp->klass_name_at(cp_index); 2535 return classname->as_utf8(); 2536 JVM_END 2537 2538 2539 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2540 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2541 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2542 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2543 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2544 switch (cp->tag_at(cp_index).value()) { 2545 case JVM_CONSTANT_Fieldref: { 2546 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2547 Symbol* classname = cp->klass_name_at(class_index); 2548 return classname->as_utf8(); 2549 } 2550 default: 2551 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2552 } 2553 ShouldNotReachHere(); 2554 return NULL; 2555 JVM_END 2556 2557 2558 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2559 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2561 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2562 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2563 switch (cp->tag_at(cp_index).value()) { 2564 case JVM_CONSTANT_Methodref: 2565 case JVM_CONSTANT_InterfaceMethodref: { 2566 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2567 Symbol* classname = cp->klass_name_at(class_index); 2568 return classname->as_utf8(); 2569 } 2570 default: 2571 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2572 } 2573 ShouldNotReachHere(); 2574 return NULL; 2575 JVM_END 2576 2577 2578 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2579 JVMWrapper("JVM_GetCPFieldModifiers"); 2580 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2581 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2582 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2583 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2584 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2585 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2586 switch (cp->tag_at(cp_index).value()) { 2587 case JVM_CONSTANT_Fieldref: { 2588 Symbol* name = cp->uncached_name_ref_at(cp_index); 2589 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2590 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2591 if (fs.name() == name && fs.signature() == signature) { 2592 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2593 } 2594 } 2595 return -1; 2596 } 2597 default: 2598 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2599 } 2600 ShouldNotReachHere(); 2601 return 0; 2602 JVM_END 2603 2604 2605 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2606 JVMWrapper("JVM_GetCPMethodModifiers"); 2607 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2608 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2609 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2610 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2611 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2612 switch (cp->tag_at(cp_index).value()) { 2613 case JVM_CONSTANT_Methodref: 2614 case JVM_CONSTANT_InterfaceMethodref: { 2615 Symbol* name = cp->uncached_name_ref_at(cp_index); 2616 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2617 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2618 int methods_count = methods->length(); 2619 for (int i = 0; i < methods_count; i++) { 2620 Method* method = methods->at(i); 2621 if (method->name() == name && method->signature() == signature) { 2622 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2623 } 2624 } 2625 return -1; 2626 } 2627 default: 2628 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2629 } 2630 ShouldNotReachHere(); 2631 return 0; 2632 JVM_END 2633 2634 2635 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2636 2637 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2638 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2639 JVM_END 2640 2641 2642 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2643 JVMWrapper("JVM_IsSameClassPackage"); 2644 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2645 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2646 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2647 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2648 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2649 JVM_END 2650 2651 2652 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2653 2654 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2655 JVMWrapper2("JVM_Open (%s)", fname); 2656 2657 //%note jvm_r6 2658 int result = os::open(fname, flags, mode); 2659 if (result >= 0) { 2660 return result; 2661 } else { 2662 switch(errno) { 2663 case EEXIST: 2664 return JVM_EEXIST; 2665 default: 2666 return -1; 2667 } 2668 } 2669 JVM_END 2670 2671 2672 JVM_LEAF(jint, JVM_Close(jint fd)) 2673 JVMWrapper2("JVM_Close (0x%x)", fd); 2674 //%note jvm_r6 2675 return os::close(fd); 2676 JVM_END 2677 2678 2679 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2680 JVMWrapper2("JVM_Read (0x%x)", fd); 2681 2682 //%note jvm_r6 2683 return (jint)os::restartable_read(fd, buf, nbytes); 2684 JVM_END 2685 2686 2687 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2688 JVMWrapper2("JVM_Write (0x%x)", fd); 2689 2690 //%note jvm_r6 2691 return (jint)os::write(fd, buf, nbytes); 2692 JVM_END 2693 2694 2695 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2696 JVMWrapper2("JVM_Available (0x%x)", fd); 2697 //%note jvm_r6 2698 return os::available(fd, pbytes); 2699 JVM_END 2700 2701 2702 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2703 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2704 //%note jvm_r6 2705 return os::lseek(fd, offset, whence); 2706 JVM_END 2707 2708 2709 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2710 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2711 return os::ftruncate(fd, length); 2712 JVM_END 2713 2714 2715 JVM_LEAF(jint, JVM_Sync(jint fd)) 2716 JVMWrapper2("JVM_Sync (0x%x)", fd); 2717 //%note jvm_r6 2718 return os::fsync(fd); 2719 JVM_END 2720 2721 2722 // Printing support ////////////////////////////////////////////////// 2723 extern "C" { 2724 2725 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2726 // see bug 4399518, 4417214 2727 if ((intptr_t)count <= 0) return -1; 2728 return vsnprintf(str, count, fmt, args); 2729 } 2730 2731 2732 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2733 va_list args; 2734 int len; 2735 va_start(args, fmt); 2736 len = jio_vsnprintf(str, count, fmt, args); 2737 va_end(args); 2738 return len; 2739 } 2740 2741 2742 int jio_fprintf(FILE* f, const char *fmt, ...) { 2743 int len; 2744 va_list args; 2745 va_start(args, fmt); 2746 len = jio_vfprintf(f, fmt, args); 2747 va_end(args); 2748 return len; 2749 } 2750 2751 2752 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2753 if (Arguments::vfprintf_hook() != NULL) { 2754 return Arguments::vfprintf_hook()(f, fmt, args); 2755 } else { 2756 return vfprintf(f, fmt, args); 2757 } 2758 } 2759 2760 2761 JNIEXPORT int jio_printf(const char *fmt, ...) { 2762 int len; 2763 va_list args; 2764 va_start(args, fmt); 2765 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2766 va_end(args); 2767 return len; 2768 } 2769 2770 2771 // HotSpot specific jio method 2772 void jio_print(const char* s) { 2773 // Try to make this function as atomic as possible. 2774 if (Arguments::vfprintf_hook() != NULL) { 2775 jio_fprintf(defaultStream::output_stream(), "%s", s); 2776 } else { 2777 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2778 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2779 } 2780 } 2781 2782 } // Extern C 2783 2784 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2785 2786 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2787 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2788 // OSThread objects. The exception to this rule is when the target object is the thread 2789 // doing the operation, in which case we know that the thread won't exit until the 2790 // operation is done (all exits being voluntary). There are a few cases where it is 2791 // rather silly to do operations on yourself, like resuming yourself or asking whether 2792 // you are alive. While these can still happen, they are not subject to deadlocks if 2793 // the lock is held while the operation occurs (this is not the case for suspend, for 2794 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2795 // implementation is local to this file, we always lock Threads_lock for that one. 2796 2797 static void thread_entry(JavaThread* thread, TRAPS) { 2798 HandleMark hm(THREAD); 2799 Handle obj(THREAD, thread->threadObj()); 2800 JavaValue result(T_VOID); 2801 JavaCalls::call_virtual(&result, 2802 obj, 2803 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2804 vmSymbols::run_method_name(), 2805 vmSymbols::void_method_signature(), 2806 THREAD); 2807 } 2808 2809 2810 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2811 JVMWrapper("JVM_StartThread"); 2812 JavaThread *native_thread = NULL; 2813 2814 // We cannot hold the Threads_lock when we throw an exception, 2815 // due to rank ordering issues. Example: we might need to grab the 2816 // Heap_lock while we construct the exception. 2817 bool throw_illegal_thread_state = false; 2818 2819 // We must release the Threads_lock before we can post a jvmti event 2820 // in Thread::start. 2821 { 2822 // Ensure that the C++ Thread and OSThread structures aren't freed before 2823 // we operate. 2824 MutexLocker mu(Threads_lock); 2825 2826 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2827 // re-starting an already started thread, so we should usually find 2828 // that the JavaThread is null. However for a JNI attached thread 2829 // there is a small window between the Thread object being created 2830 // (with its JavaThread set) and the update to its threadStatus, so we 2831 // have to check for this 2832 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2833 throw_illegal_thread_state = true; 2834 } else { 2835 // We could also check the stillborn flag to see if this thread was already stopped, but 2836 // for historical reasons we let the thread detect that itself when it starts running 2837 2838 jlong size = 2839 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2840 // Allocate the C++ Thread structure and create the native thread. The 2841 // stack size retrieved from java is signed, but the constructor takes 2842 // size_t (an unsigned type), so avoid passing negative values which would 2843 // result in really large stacks. 2844 size_t sz = size > 0 ? (size_t) size : 0; 2845 native_thread = new JavaThread(&thread_entry, sz); 2846 2847 // At this point it may be possible that no osthread was created for the 2848 // JavaThread due to lack of memory. Check for this situation and throw 2849 // an exception if necessary. Eventually we may want to change this so 2850 // that we only grab the lock if the thread was created successfully - 2851 // then we can also do this check and throw the exception in the 2852 // JavaThread constructor. 2853 if (native_thread->osthread() != NULL) { 2854 // Note: the current thread is not being used within "prepare". 2855 native_thread->prepare(jthread); 2856 } 2857 } 2858 } 2859 2860 if (throw_illegal_thread_state) { 2861 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2862 } 2863 2864 assert(native_thread != NULL, "Starting null thread?"); 2865 2866 if (native_thread->osthread() == NULL) { 2867 // No one should hold a reference to the 'native_thread'. 2868 delete native_thread; 2869 if (JvmtiExport::should_post_resource_exhausted()) { 2870 JvmtiExport::post_resource_exhausted( 2871 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2872 "unable to create new native thread"); 2873 } 2874 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2875 "unable to create new native thread"); 2876 } 2877 2878 Thread::start(native_thread); 2879 2880 JVM_END 2881 2882 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2883 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2884 // but is thought to be reliable and simple. In the case, where the receiver is the 2885 // same thread as the sender, no safepoint is needed. 2886 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2887 JVMWrapper("JVM_StopThread"); 2888 2889 oop java_throwable = JNIHandles::resolve(throwable); 2890 if (java_throwable == NULL) { 2891 THROW(vmSymbols::java_lang_NullPointerException()); 2892 } 2893 oop java_thread = JNIHandles::resolve_non_null(jthread); 2894 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2895 Events::log_exception(JavaThread::current(), 2896 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2897 receiver, (address)java_thread, throwable); 2898 // First check if thread is alive 2899 if (receiver != NULL) { 2900 // Check if exception is getting thrown at self (use oop equality, since the 2901 // target object might exit) 2902 if (java_thread == thread->threadObj()) { 2903 THROW_OOP(java_throwable); 2904 } else { 2905 // Enques a VM_Operation to stop all threads and then deliver the exception... 2906 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2907 } 2908 } 2909 else { 2910 // Either: 2911 // - target thread has not been started before being stopped, or 2912 // - target thread already terminated 2913 // We could read the threadStatus to determine which case it is 2914 // but that is overkill as it doesn't matter. We must set the 2915 // stillborn flag for the first case, and if the thread has already 2916 // exited setting this flag has no affect 2917 java_lang_Thread::set_stillborn(java_thread); 2918 } 2919 JVM_END 2920 2921 2922 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2923 JVMWrapper("JVM_IsThreadAlive"); 2924 2925 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2926 return java_lang_Thread::is_alive(thread_oop); 2927 JVM_END 2928 2929 2930 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2931 JVMWrapper("JVM_SuspendThread"); 2932 oop java_thread = JNIHandles::resolve_non_null(jthread); 2933 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2934 2935 if (receiver != NULL) { 2936 // thread has run and has not exited (still on threads list) 2937 2938 { 2939 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2940 if (receiver->is_external_suspend()) { 2941 // Don't allow nested external suspend requests. We can't return 2942 // an error from this interface so just ignore the problem. 2943 return; 2944 } 2945 if (receiver->is_exiting()) { // thread is in the process of exiting 2946 return; 2947 } 2948 receiver->set_external_suspend(); 2949 } 2950 2951 // java_suspend() will catch threads in the process of exiting 2952 // and will ignore them. 2953 receiver->java_suspend(); 2954 2955 // It would be nice to have the following assertion in all the 2956 // time, but it is possible for a racing resume request to have 2957 // resumed this thread right after we suspended it. Temporarily 2958 // enable this assertion if you are chasing a different kind of 2959 // bug. 2960 // 2961 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2962 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2963 } 2964 JVM_END 2965 2966 2967 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2968 JVMWrapper("JVM_ResumeThread"); 2969 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2970 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2971 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2972 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2973 // looks at it. 2974 MutexLocker ml(Threads_lock); 2975 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2976 if (thr != NULL) { 2977 // the thread has run and is not in the process of exiting 2978 thr->java_resume(); 2979 } 2980 JVM_END 2981 2982 2983 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2984 JVMWrapper("JVM_SetThreadPriority"); 2985 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2986 MutexLocker ml(Threads_lock); 2987 oop java_thread = JNIHandles::resolve_non_null(jthread); 2988 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2989 JavaThread* thr = java_lang_Thread::thread(java_thread); 2990 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2991 Thread::set_priority(thr, (ThreadPriority)prio); 2992 } 2993 JVM_END 2994 2995 2996 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2997 JVMWrapper("JVM_Yield"); 2998 if (os::dont_yield()) return; 2999 HOTSPOT_THREAD_YIELD(); 3000 3001 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3002 // Critical for similar threading behaviour 3003 if (ConvertYieldToSleep) { 3004 os::sleep(thread, MinSleepInterval, false); 3005 } else { 3006 os::yield(); 3007 } 3008 JVM_END 3009 3010 3011 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3012 JVMWrapper("JVM_Sleep"); 3013 3014 if (millis < 0) { 3015 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3016 } 3017 3018 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3019 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3020 } 3021 3022 // Save current thread state and restore it at the end of this block. 3023 // And set new thread state to SLEEPING. 3024 JavaThreadSleepState jtss(thread); 3025 3026 HOTSPOT_THREAD_SLEEP_BEGIN(millis); 3027 3028 EventThreadSleep event; 3029 3030 if (millis == 0) { 3031 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3032 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3033 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3034 // for SOLARIS 3035 if (ConvertSleepToYield) { 3036 os::yield(); 3037 } else { 3038 ThreadState old_state = thread->osthread()->get_state(); 3039 thread->osthread()->set_state(SLEEPING); 3040 os::sleep(thread, MinSleepInterval, false); 3041 thread->osthread()->set_state(old_state); 3042 } 3043 } else { 3044 ThreadState old_state = thread->osthread()->get_state(); 3045 thread->osthread()->set_state(SLEEPING); 3046 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3047 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3048 // us while we were sleeping. We do not overwrite those. 3049 if (!HAS_PENDING_EXCEPTION) { 3050 if (event.should_commit()) { 3051 event.set_time(millis); 3052 event.commit(); 3053 } 3054 HOTSPOT_THREAD_SLEEP_END(1); 3055 3056 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3057 // to properly restore the thread state. That's likely wrong. 3058 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3059 } 3060 } 3061 thread->osthread()->set_state(old_state); 3062 } 3063 if (event.should_commit()) { 3064 event.set_time(millis); 3065 event.commit(); 3066 } 3067 HOTSPOT_THREAD_SLEEP_END(0); 3068 JVM_END 3069 3070 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3071 JVMWrapper("JVM_CurrentThread"); 3072 oop jthread = thread->threadObj(); 3073 assert (thread != NULL, "no current thread!"); 3074 return JNIHandles::make_local(env, jthread); 3075 JVM_END 3076 3077 3078 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3079 JVMWrapper("JVM_CountStackFrames"); 3080 3081 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3082 oop java_thread = JNIHandles::resolve_non_null(jthread); 3083 bool throw_illegal_thread_state = false; 3084 int count = 0; 3085 3086 { 3087 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3088 // We need to re-resolve the java_thread, since a GC might have happened during the 3089 // acquire of the lock 3090 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3091 3092 if (thr == NULL) { 3093 // do nothing 3094 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3095 // Check whether this java thread has been suspended already. If not, throws 3096 // IllegalThreadStateException. We defer to throw that exception until 3097 // Threads_lock is released since loading exception class has to leave VM. 3098 // The correct way to test a thread is actually suspended is 3099 // wait_for_ext_suspend_completion(), but we can't call that while holding 3100 // the Threads_lock. The above tests are sufficient for our purposes 3101 // provided the walkability of the stack is stable - which it isn't 3102 // 100% but close enough for most practical purposes. 3103 throw_illegal_thread_state = true; 3104 } else { 3105 // Count all java activation, i.e., number of vframes 3106 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3107 // Native frames are not counted 3108 if (!vfst.method()->is_native()) count++; 3109 } 3110 } 3111 } 3112 3113 if (throw_illegal_thread_state) { 3114 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3115 "this thread is not suspended"); 3116 } 3117 return count; 3118 JVM_END 3119 3120 // Consider: A better way to implement JVM_Interrupt() is to acquire 3121 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3122 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3123 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3124 // outside the critical section. Threads_lock is hot so we want to minimize 3125 // the hold-time. A cleaner interface would be to decompose interrupt into 3126 // two steps. The 1st phase, performed under Threads_lock, would return 3127 // a closure that'd be invoked after Threads_lock was dropped. 3128 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3129 // admit spurious wakeups. 3130 3131 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3132 JVMWrapper("JVM_Interrupt"); 3133 3134 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3135 oop java_thread = JNIHandles::resolve_non_null(jthread); 3136 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3137 // We need to re-resolve the java_thread, since a GC might have happened during the 3138 // acquire of the lock 3139 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3140 if (thr != NULL) { 3141 Thread::interrupt(thr); 3142 } 3143 JVM_END 3144 3145 3146 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3147 JVMWrapper("JVM_IsInterrupted"); 3148 3149 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3150 oop java_thread = JNIHandles::resolve_non_null(jthread); 3151 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3152 // We need to re-resolve the java_thread, since a GC might have happened during the 3153 // acquire of the lock 3154 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3155 if (thr == NULL) { 3156 return JNI_FALSE; 3157 } else { 3158 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3159 } 3160 JVM_END 3161 3162 3163 // Return true iff the current thread has locked the object passed in 3164 3165 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3166 JVMWrapper("JVM_HoldsLock"); 3167 assert(THREAD->is_Java_thread(), "sanity check"); 3168 if (obj == NULL) { 3169 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3170 } 3171 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3172 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3173 JVM_END 3174 3175 3176 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3177 JVMWrapper("JVM_DumpAllStacks"); 3178 VM_PrintThreads op; 3179 VMThread::execute(&op); 3180 if (JvmtiExport::should_post_data_dump()) { 3181 JvmtiExport::post_data_dump(); 3182 } 3183 JVM_END 3184 3185 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3186 JVMWrapper("JVM_SetNativeThreadName"); 3187 ResourceMark rm(THREAD); 3188 oop java_thread = JNIHandles::resolve_non_null(jthread); 3189 JavaThread* thr = java_lang_Thread::thread(java_thread); 3190 // Thread naming only supported for the current thread, doesn't work for 3191 // target threads. 3192 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3193 // we don't set the name of an attached thread to avoid stepping 3194 // on other programs 3195 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3196 os::set_native_thread_name(thread_name); 3197 } 3198 JVM_END 3199 3200 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3201 3202 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3203 assert(jthread->is_Java_thread(), "must be a Java thread"); 3204 if (jthread->privileged_stack_top() == NULL) return false; 3205 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3206 oop loader = jthread->privileged_stack_top()->class_loader(); 3207 if (loader == NULL) return true; 3208 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3209 if (trusted) return true; 3210 } 3211 return false; 3212 } 3213 3214 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3215 JVMWrapper("JVM_CurrentLoadedClass"); 3216 ResourceMark rm(THREAD); 3217 3218 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3219 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3220 bool trusted = is_trusted_frame(thread, &vfst); 3221 if (trusted) return NULL; 3222 3223 Method* m = vfst.method(); 3224 if (!m->is_native()) { 3225 InstanceKlass* holder = m->method_holder(); 3226 oop loader = holder->class_loader(); 3227 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3228 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3229 } 3230 } 3231 } 3232 return NULL; 3233 JVM_END 3234 3235 3236 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3237 JVMWrapper("JVM_CurrentClassLoader"); 3238 ResourceMark rm(THREAD); 3239 3240 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3241 3242 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3243 bool trusted = is_trusted_frame(thread, &vfst); 3244 if (trusted) return NULL; 3245 3246 Method* m = vfst.method(); 3247 if (!m->is_native()) { 3248 InstanceKlass* holder = m->method_holder(); 3249 assert(holder->is_klass(), "just checking"); 3250 oop loader = holder->class_loader(); 3251 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3252 return JNIHandles::make_local(env, loader); 3253 } 3254 } 3255 } 3256 return NULL; 3257 JVM_END 3258 3259 3260 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3261 JVMWrapper("JVM_GetClassContext"); 3262 ResourceMark rm(THREAD); 3263 JvmtiVMObjectAllocEventCollector oam; 3264 vframeStream vfst(thread); 3265 3266 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3267 // This must only be called from SecurityManager.getClassContext 3268 Method* m = vfst.method(); 3269 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3270 m->name() == vmSymbols::getClassContext_name() && 3271 m->signature() == vmSymbols::void_class_array_signature())) { 3272 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3273 } 3274 } 3275 3276 // Collect method holders 3277 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3278 for (; !vfst.at_end(); vfst.security_next()) { 3279 Method* m = vfst.method(); 3280 // Native frames are not returned 3281 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3282 Klass* holder = m->method_holder(); 3283 assert(holder->is_klass(), "just checking"); 3284 klass_array->append(holder); 3285 } 3286 } 3287 3288 // Create result array of type [Ljava/lang/Class; 3289 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3290 // Fill in mirrors corresponding to method holders 3291 for (int i = 0; i < klass_array->length(); i++) { 3292 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3293 } 3294 3295 return (jobjectArray) JNIHandles::make_local(env, result); 3296 JVM_END 3297 3298 3299 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3300 JVMWrapper("JVM_ClassDepth"); 3301 ResourceMark rm(THREAD); 3302 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3303 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3304 3305 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3306 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3307 if (class_name_sym == NULL) { 3308 return -1; 3309 } 3310 3311 int depth = 0; 3312 3313 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3314 if (!vfst.method()->is_native()) { 3315 InstanceKlass* holder = vfst.method()->method_holder(); 3316 assert(holder->is_klass(), "just checking"); 3317 if (holder->name() == class_name_sym) { 3318 return depth; 3319 } 3320 depth++; 3321 } 3322 } 3323 return -1; 3324 JVM_END 3325 3326 3327 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3328 JVMWrapper("JVM_ClassLoaderDepth"); 3329 ResourceMark rm(THREAD); 3330 int depth = 0; 3331 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3332 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3333 bool trusted = is_trusted_frame(thread, &vfst); 3334 if (trusted) return -1; 3335 3336 Method* m = vfst.method(); 3337 if (!m->is_native()) { 3338 InstanceKlass* holder = m->method_holder(); 3339 assert(holder->is_klass(), "just checking"); 3340 oop loader = holder->class_loader(); 3341 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3342 return depth; 3343 } 3344 depth++; 3345 } 3346 } 3347 return -1; 3348 JVM_END 3349 3350 3351 // java.lang.Package //////////////////////////////////////////////////////////////// 3352 3353 3354 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3355 JVMWrapper("JVM_GetSystemPackage"); 3356 ResourceMark rm(THREAD); 3357 JvmtiVMObjectAllocEventCollector oam; 3358 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3359 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3360 return (jstring) JNIHandles::make_local(result); 3361 JVM_END 3362 3363 3364 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3365 JVMWrapper("JVM_GetSystemPackages"); 3366 JvmtiVMObjectAllocEventCollector oam; 3367 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3368 return (jobjectArray) JNIHandles::make_local(result); 3369 JVM_END 3370 3371 3372 // ObjectInputStream /////////////////////////////////////////////////////////////// 3373 3374 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3375 if (current_class == NULL) { 3376 return true; 3377 } 3378 if ((current_class == field_class) || access.is_public()) { 3379 return true; 3380 } 3381 3382 if (access.is_protected()) { 3383 // See if current_class is a subclass of field_class 3384 if (current_class->is_subclass_of(field_class)) { 3385 return true; 3386 } 3387 } 3388 3389 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3390 } 3391 3392 3393 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3394 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3395 JVMWrapper("JVM_AllocateNewObject"); 3396 JvmtiVMObjectAllocEventCollector oam; 3397 // Receiver is not used 3398 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3399 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3400 3401 // Cannot instantiate primitive types 3402 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3403 ResourceMark rm(THREAD); 3404 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3405 } 3406 3407 // Arrays not allowed here, must use JVM_AllocateNewArray 3408 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3409 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3410 ResourceMark rm(THREAD); 3411 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3412 } 3413 3414 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3415 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3416 3417 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3418 3419 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3420 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3421 3422 // Make sure klass is initialized, since we are about to instantiate one of them. 3423 curr_klass->initialize(CHECK_NULL); 3424 3425 methodHandle m (THREAD, 3426 init_klass->find_method(vmSymbols::object_initializer_name(), 3427 vmSymbols::void_method_signature())); 3428 if (m.is_null()) { 3429 ResourceMark rm(THREAD); 3430 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3431 Method::name_and_sig_as_C_string(init_klass(), 3432 vmSymbols::object_initializer_name(), 3433 vmSymbols::void_method_signature())); 3434 } 3435 3436 if (curr_klass == init_klass && !m->is_public()) { 3437 // Calling the constructor for class 'curr_klass'. 3438 // Only allow calls to a public no-arg constructor. 3439 // This path corresponds to creating an Externalizable object. 3440 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3441 } 3442 3443 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3444 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3445 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3446 } 3447 3448 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3449 // Call constructor m. This might call a constructor higher up in the hierachy 3450 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3451 3452 return JNIHandles::make_local(obj()); 3453 JVM_END 3454 3455 3456 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3457 JVMWrapper("JVM_AllocateNewArray"); 3458 JvmtiVMObjectAllocEventCollector oam; 3459 oop mirror = JNIHandles::resolve_non_null(currClass); 3460 3461 if (java_lang_Class::is_primitive(mirror)) { 3462 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3463 } 3464 Klass* k = java_lang_Class::as_Klass(mirror); 3465 oop result; 3466 3467 if (k->oop_is_typeArray()) { 3468 // typeArray 3469 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3470 } else if (k->oop_is_objArray()) { 3471 // objArray 3472 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3473 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3474 result = oak->allocate(length, CHECK_NULL); 3475 } else { 3476 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3477 } 3478 return JNIHandles::make_local(env, result); 3479 JVM_END 3480 3481 3482 // Return the first non-null class loader up the execution stack, or null 3483 // if only code from the null class loader is on the stack. 3484 3485 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3486 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3487 // UseNewReflection 3488 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3489 oop loader = vfst.method()->method_holder()->class_loader(); 3490 if (loader != NULL) { 3491 return JNIHandles::make_local(env, loader); 3492 } 3493 } 3494 return NULL; 3495 JVM_END 3496 3497 3498 // Load a class relative to the most recent class on the stack with a non-null 3499 // classloader. 3500 // This function has been deprecated and should not be considered part of the 3501 // specified JVM interface. 3502 3503 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3504 jclass currClass, jstring currClassName)) 3505 JVMWrapper("JVM_LoadClass0"); 3506 // Receiver is not used 3507 ResourceMark rm(THREAD); 3508 3509 // Class name argument is not guaranteed to be in internal format 3510 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3511 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3512 3513 const char* str = java_lang_String::as_utf8_string(string()); 3514 3515 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3516 // It's impossible to create this class; the name cannot fit 3517 // into the constant pool. 3518 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3519 } 3520 3521 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3522 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3523 // Find the most recent class on the stack with a non-null classloader 3524 oop loader = NULL; 3525 oop protection_domain = NULL; 3526 if (curr_klass.is_null()) { 3527 for (vframeStream vfst(thread); 3528 !vfst.at_end() && loader == NULL; 3529 vfst.next()) { 3530 if (!vfst.method()->is_native()) { 3531 InstanceKlass* holder = vfst.method()->method_holder(); 3532 loader = holder->class_loader(); 3533 protection_domain = holder->protection_domain(); 3534 } 3535 } 3536 } else { 3537 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3538 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3539 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3540 } 3541 Handle h_loader(THREAD, loader); 3542 Handle h_prot (THREAD, protection_domain); 3543 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3544 false, thread); 3545 if (TraceClassResolution && result != NULL) { 3546 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3547 } 3548 return result; 3549 JVM_END 3550 3551 3552 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3553 3554 3555 // resolve array handle and check arguments 3556 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3557 if (arr == NULL) { 3558 THROW_0(vmSymbols::java_lang_NullPointerException()); 3559 } 3560 oop a = JNIHandles::resolve_non_null(arr); 3561 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3562 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3563 } 3564 return arrayOop(a); 3565 } 3566 3567 3568 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3569 JVMWrapper("JVM_GetArrayLength"); 3570 arrayOop a = check_array(env, arr, false, CHECK_0); 3571 return a->length(); 3572 JVM_END 3573 3574 3575 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3576 JVMWrapper("JVM_Array_Get"); 3577 JvmtiVMObjectAllocEventCollector oam; 3578 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3579 jvalue value; 3580 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3581 oop box = Reflection::box(&value, type, CHECK_NULL); 3582 return JNIHandles::make_local(env, box); 3583 JVM_END 3584 3585 3586 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3587 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3588 jvalue value; 3589 value.i = 0; // to initialize value before getting used in CHECK 3590 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3591 assert(a->is_typeArray(), "just checking"); 3592 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3593 BasicType wide_type = (BasicType) wCode; 3594 if (type != wide_type) { 3595 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3596 } 3597 return value; 3598 JVM_END 3599 3600 3601 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3602 JVMWrapper("JVM_SetArrayElement"); 3603 arrayOop a = check_array(env, arr, false, CHECK); 3604 oop box = JNIHandles::resolve(val); 3605 jvalue value; 3606 value.i = 0; // to initialize value before getting used in CHECK 3607 BasicType value_type; 3608 if (a->is_objArray()) { 3609 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3610 value_type = Reflection::unbox_for_regular_object(box, &value); 3611 } else { 3612 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3613 } 3614 Reflection::array_set(&value, a, index, value_type, CHECK); 3615 JVM_END 3616 3617 3618 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3619 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3620 arrayOop a = check_array(env, arr, true, CHECK); 3621 assert(a->is_typeArray(), "just checking"); 3622 BasicType value_type = (BasicType) vCode; 3623 Reflection::array_set(&v, a, index, value_type, CHECK); 3624 JVM_END 3625 3626 3627 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3628 JVMWrapper("JVM_NewArray"); 3629 JvmtiVMObjectAllocEventCollector oam; 3630 oop element_mirror = JNIHandles::resolve(eltClass); 3631 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3632 return JNIHandles::make_local(env, result); 3633 JVM_END 3634 3635 3636 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3637 JVMWrapper("JVM_NewMultiArray"); 3638 JvmtiVMObjectAllocEventCollector oam; 3639 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3640 oop element_mirror = JNIHandles::resolve(eltClass); 3641 assert(dim_array->is_typeArray(), "just checking"); 3642 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3643 return JNIHandles::make_local(env, result); 3644 JVM_END 3645 3646 3647 // Networking library support //////////////////////////////////////////////////////////////////// 3648 3649 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3650 JVMWrapper("JVM_InitializeSocketLibrary"); 3651 return 0; 3652 JVM_END 3653 3654 3655 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3656 JVMWrapper("JVM_Socket"); 3657 return os::socket(domain, type, protocol); 3658 JVM_END 3659 3660 3661 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3662 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3663 //%note jvm_r6 3664 return os::socket_close(fd); 3665 JVM_END 3666 3667 3668 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3669 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3670 //%note jvm_r6 3671 return os::socket_shutdown(fd, howto); 3672 JVM_END 3673 3674 3675 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3676 JVMWrapper2("JVM_Recv (0x%x)", fd); 3677 //%note jvm_r6 3678 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3679 JVM_END 3680 3681 3682 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3683 JVMWrapper2("JVM_Send (0x%x)", fd); 3684 //%note jvm_r6 3685 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3686 JVM_END 3687 3688 3689 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3690 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3691 //%note jvm_r6 3692 return os::timeout(fd, timeout); 3693 JVM_END 3694 3695 3696 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3697 JVMWrapper2("JVM_Listen (0x%x)", fd); 3698 //%note jvm_r6 3699 return os::listen(fd, count); 3700 JVM_END 3701 3702 3703 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3704 JVMWrapper2("JVM_Connect (0x%x)", fd); 3705 //%note jvm_r6 3706 return os::connect(fd, him, (socklen_t)len); 3707 JVM_END 3708 3709 3710 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3711 JVMWrapper2("JVM_Bind (0x%x)", fd); 3712 //%note jvm_r6 3713 return os::bind(fd, him, (socklen_t)len); 3714 JVM_END 3715 3716 3717 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3718 JVMWrapper2("JVM_Accept (0x%x)", fd); 3719 //%note jvm_r6 3720 socklen_t socklen = (socklen_t)(*len); 3721 jint result = os::accept(fd, him, &socklen); 3722 *len = (jint)socklen; 3723 return result; 3724 JVM_END 3725 3726 3727 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3728 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3729 //%note jvm_r6 3730 socklen_t socklen = (socklen_t)(*fromlen); 3731 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3732 *fromlen = (int)socklen; 3733 return result; 3734 JVM_END 3735 3736 3737 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3738 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3739 //%note jvm_r6 3740 socklen_t socklen = (socklen_t)(*len); 3741 jint result = os::get_sock_name(fd, him, &socklen); 3742 *len = (int)socklen; 3743 return result; 3744 JVM_END 3745 3746 3747 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3748 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3749 //%note jvm_r6 3750 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3751 JVM_END 3752 3753 3754 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3755 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3756 //%note jvm_r6 3757 return os::socket_available(fd, pbytes); 3758 JVM_END 3759 3760 3761 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3762 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3763 //%note jvm_r6 3764 socklen_t socklen = (socklen_t)(*optlen); 3765 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3766 *optlen = (int)socklen; 3767 return result; 3768 JVM_END 3769 3770 3771 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3772 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3773 //%note jvm_r6 3774 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3775 JVM_END 3776 3777 3778 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3779 JVMWrapper("JVM_GetHostName"); 3780 return os::get_host_name(name, namelen); 3781 JVM_END 3782 3783 3784 // Library support /////////////////////////////////////////////////////////////////////////// 3785 3786 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3787 //%note jvm_ct 3788 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3789 char ebuf[1024]; 3790 void *load_result; 3791 { 3792 ThreadToNativeFromVM ttnfvm(thread); 3793 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3794 } 3795 if (load_result == NULL) { 3796 char msg[1024]; 3797 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3798 // Since 'ebuf' may contain a string encoded using 3799 // platform encoding scheme, we need to pass 3800 // Exceptions::unsafe_to_utf8 to the new_exception method 3801 // as the last argument. See bug 6367357. 3802 Handle h_exception = 3803 Exceptions::new_exception(thread, 3804 vmSymbols::java_lang_UnsatisfiedLinkError(), 3805 msg, Exceptions::unsafe_to_utf8); 3806 3807 THROW_HANDLE_0(h_exception); 3808 } 3809 return load_result; 3810 JVM_END 3811 3812 3813 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3814 JVMWrapper("JVM_UnloadLibrary"); 3815 os::dll_unload(handle); 3816 JVM_END 3817 3818 3819 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3820 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3821 return os::dll_lookup(handle, name); 3822 JVM_END 3823 3824 3825 // Floating point support //////////////////////////////////////////////////////////////////// 3826 3827 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3828 JVMWrapper("JVM_IsNaN"); 3829 return g_isnan(a); 3830 JVM_END 3831 3832 3833 // JNI version /////////////////////////////////////////////////////////////////////////////// 3834 3835 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3836 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3837 return Threads::is_supported_jni_version_including_1_1(version); 3838 JVM_END 3839 3840 3841 // String support /////////////////////////////////////////////////////////////////////////// 3842 3843 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3844 JVMWrapper("JVM_InternString"); 3845 JvmtiVMObjectAllocEventCollector oam; 3846 if (str == NULL) return NULL; 3847 oop string = JNIHandles::resolve_non_null(str); 3848 oop result = StringTable::intern(string, CHECK_NULL); 3849 return (jstring) JNIHandles::make_local(env, result); 3850 JVM_END 3851 3852 3853 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3854 3855 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3856 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3857 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3858 // that only works with java threads. 3859 3860 3861 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3862 VM_Exit::block_if_vm_exited(); 3863 JVMWrapper("JVM_RawMonitorCreate"); 3864 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3865 } 3866 3867 3868 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3869 VM_Exit::block_if_vm_exited(); 3870 JVMWrapper("JVM_RawMonitorDestroy"); 3871 delete ((Mutex*) mon); 3872 } 3873 3874 3875 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3876 VM_Exit::block_if_vm_exited(); 3877 JVMWrapper("JVM_RawMonitorEnter"); 3878 ((Mutex*) mon)->jvm_raw_lock(); 3879 return 0; 3880 } 3881 3882 3883 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3884 VM_Exit::block_if_vm_exited(); 3885 JVMWrapper("JVM_RawMonitorExit"); 3886 ((Mutex*) mon)->jvm_raw_unlock(); 3887 } 3888 3889 3890 // Support for Serialization 3891 3892 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3893 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3894 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3895 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3896 3897 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3898 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3899 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3900 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3901 3902 3903 void initialize_converter_functions() { 3904 if (JDK_Version::is_gte_jdk14x_version()) { 3905 // These functions only exist for compatibility with 1.3.1 and earlier 3906 return; 3907 } 3908 3909 // called from universe_post_init() 3910 assert( 3911 int_bits_to_float_fn == NULL && 3912 long_bits_to_double_fn == NULL && 3913 float_to_int_bits_fn == NULL && 3914 double_to_long_bits_fn == NULL , 3915 "initialization done twice" 3916 ); 3917 // initialize 3918 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3919 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3920 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3921 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3922 // verify 3923 assert( 3924 int_bits_to_float_fn != NULL && 3925 long_bits_to_double_fn != NULL && 3926 float_to_int_bits_fn != NULL && 3927 double_to_long_bits_fn != NULL , 3928 "initialization failed" 3929 ); 3930 } 3931 3932 3933 3934 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3935 3936 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3937 // Security Note: 3938 // The Java level wrapper will perform the necessary security check allowing 3939 // us to pass the NULL as the initiating class loader. 3940 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3941 3942 KlassHandle klass_handle(THREAD, klass); 3943 // Check if we should initialize the class 3944 if (init && klass_handle->oop_is_instance()) { 3945 klass_handle->initialize(CHECK_NULL); 3946 } 3947 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3948 } 3949 3950 3951 // Method /////////////////////////////////////////////////////////////////////////////////////////// 3952 3953 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3954 JVMWrapper("JVM_InvokeMethod"); 3955 Handle method_handle; 3956 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3957 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3958 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3959 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3960 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3961 jobject res = JNIHandles::make_local(env, result); 3962 if (JvmtiExport::should_post_vm_object_alloc()) { 3963 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 3964 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 3965 if (java_lang_Class::is_primitive(ret_type)) { 3966 // Only for primitive type vm allocates memory for java object. 3967 // See box() method. 3968 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 3969 } 3970 } 3971 return res; 3972 } else { 3973 THROW_0(vmSymbols::java_lang_StackOverflowError()); 3974 } 3975 JVM_END 3976 3977 3978 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 3979 JVMWrapper("JVM_NewInstanceFromConstructor"); 3980 oop constructor_mirror = JNIHandles::resolve(c); 3981 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3982 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 3983 jobject res = JNIHandles::make_local(env, result); 3984 if (JvmtiExport::should_post_vm_object_alloc()) { 3985 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 3986 } 3987 return res; 3988 JVM_END 3989 3990 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 3991 3992 JVM_LEAF(jboolean, JVM_SupportsCX8()) 3993 JVMWrapper("JVM_SupportsCX8"); 3994 return VM_Version::supports_cx8(); 3995 JVM_END 3996 3997 3998 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 3999 JVMWrapper("JVM_CX8Field"); 4000 jlong res; 4001 oop o = JNIHandles::resolve(obj); 4002 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4003 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4004 4005 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4006 res = Atomic::cmpxchg(newVal, addr, oldVal); 4007 4008 return res == oldVal; 4009 JVM_END 4010 4011 // DTrace /////////////////////////////////////////////////////////////////// 4012 4013 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4014 JVMWrapper("JVM_DTraceGetVersion"); 4015 return (jint)JVM_TRACING_DTRACE_VERSION; 4016 JVM_END 4017 4018 JVM_ENTRY(jlong,JVM_DTraceActivate( 4019 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4020 JVM_DTraceProvider* providers)) 4021 JVMWrapper("JVM_DTraceActivate"); 4022 return DTraceJSDT::activate( 4023 version, module_name, providers_count, providers, CHECK_0); 4024 JVM_END 4025 4026 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4027 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4028 return DTraceJSDT::is_probe_enabled(method); 4029 JVM_END 4030 4031 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4032 JVMWrapper("JVM_DTraceDispose"); 4033 DTraceJSDT::dispose(handle); 4034 JVM_END 4035 4036 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4037 JVMWrapper("JVM_DTraceIsSupported"); 4038 return DTraceJSDT::is_supported(); 4039 JVM_END 4040 4041 // Returns an array of all live Thread objects (VM internal JavaThreads, 4042 // jvmti agent threads, and JNI attaching threads are skipped) 4043 // See CR 6404306 regarding JNI attaching threads 4044 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4045 ResourceMark rm(THREAD); 4046 ThreadsListEnumerator tle(THREAD, false, false); 4047 JvmtiVMObjectAllocEventCollector oam; 4048 4049 int num_threads = tle.num_threads(); 4050 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4051 objArrayHandle threads_ah(THREAD, r); 4052 4053 for (int i = 0; i < num_threads; i++) { 4054 Handle h = tle.get_threadObj(i); 4055 threads_ah->obj_at_put(i, h()); 4056 } 4057 4058 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4059 JVM_END 4060 4061 4062 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4063 // Return StackTraceElement[][], each element is the stack trace of a thread in 4064 // the corresponding entry in the given threads array 4065 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4066 JVMWrapper("JVM_DumpThreads"); 4067 JvmtiVMObjectAllocEventCollector oam; 4068 4069 // Check if threads is null 4070 if (threads == NULL) { 4071 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4072 } 4073 4074 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4075 objArrayHandle ah(THREAD, a); 4076 int num_threads = ah->length(); 4077 // check if threads is non-empty array 4078 if (num_threads == 0) { 4079 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4080 } 4081 4082 // check if threads is not an array of objects of Thread class 4083 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4084 if (k != SystemDictionary::Thread_klass()) { 4085 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4086 } 4087 4088 ResourceMark rm(THREAD); 4089 4090 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4091 for (int i = 0; i < num_threads; i++) { 4092 oop thread_obj = ah->obj_at(i); 4093 instanceHandle h(THREAD, (instanceOop) thread_obj); 4094 thread_handle_array->append(h); 4095 } 4096 4097 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4098 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4099 4100 JVM_END 4101 4102 // JVM monitoring and management support 4103 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4104 return Management::get_jmm_interface(version); 4105 JVM_END 4106 4107 // com.sun.tools.attach.VirtualMachine agent properties support 4108 // 4109 // Initialize the agent properties with the properties maintained in the VM 4110 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4111 JVMWrapper("JVM_InitAgentProperties"); 4112 ResourceMark rm; 4113 4114 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4115 4116 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4117 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4118 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4119 return properties; 4120 JVM_END 4121 4122 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4123 { 4124 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4125 JvmtiVMObjectAllocEventCollector oam; 4126 4127 if (ofClass == NULL) { 4128 return NULL; 4129 } 4130 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4131 // Special handling for primitive objects 4132 if (java_lang_Class::is_primitive(mirror())) { 4133 return NULL; 4134 } 4135 Klass* k = java_lang_Class::as_Klass(mirror()); 4136 if (!k->oop_is_instance()) { 4137 return NULL; 4138 } 4139 instanceKlassHandle ik_h(THREAD, k); 4140 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4141 if (encl_method_class_idx == 0) { 4142 return NULL; 4143 } 4144 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4145 objArrayHandle dest(THREAD, dest_o); 4146 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4147 dest->obj_at_put(0, enc_k->java_mirror()); 4148 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4149 if (encl_method_method_idx != 0) { 4150 Symbol* sym = ik_h->constants()->symbol_at( 4151 extract_low_short_from_int( 4152 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4153 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4154 dest->obj_at_put(1, str()); 4155 sym = ik_h->constants()->symbol_at( 4156 extract_high_short_from_int( 4157 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4158 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4159 dest->obj_at_put(2, str()); 4160 } 4161 return (jobjectArray) JNIHandles::make_local(dest()); 4162 } 4163 JVM_END 4164 4165 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4166 jint javaThreadState)) 4167 { 4168 // If new thread states are added in future JDK and VM versions, 4169 // this should check if the JDK version is compatible with thread 4170 // states supported by the VM. Return NULL if not compatible. 4171 // 4172 // This function must map the VM java_lang_Thread::ThreadStatus 4173 // to the Java thread state that the JDK supports. 4174 // 4175 4176 typeArrayHandle values_h; 4177 switch (javaThreadState) { 4178 case JAVA_THREAD_STATE_NEW : { 4179 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4180 values_h = typeArrayHandle(THREAD, r); 4181 values_h->int_at_put(0, java_lang_Thread::NEW); 4182 break; 4183 } 4184 case JAVA_THREAD_STATE_RUNNABLE : { 4185 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4186 values_h = typeArrayHandle(THREAD, r); 4187 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4188 break; 4189 } 4190 case JAVA_THREAD_STATE_BLOCKED : { 4191 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4192 values_h = typeArrayHandle(THREAD, r); 4193 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4194 break; 4195 } 4196 case JAVA_THREAD_STATE_WAITING : { 4197 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4198 values_h = typeArrayHandle(THREAD, r); 4199 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4200 values_h->int_at_put(1, java_lang_Thread::PARKED); 4201 break; 4202 } 4203 case JAVA_THREAD_STATE_TIMED_WAITING : { 4204 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4205 values_h = typeArrayHandle(THREAD, r); 4206 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4207 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4208 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4209 break; 4210 } 4211 case JAVA_THREAD_STATE_TERMINATED : { 4212 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4213 values_h = typeArrayHandle(THREAD, r); 4214 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4215 break; 4216 } 4217 default: 4218 // Unknown state - probably incompatible JDK version 4219 return NULL; 4220 } 4221 4222 return (jintArray) JNIHandles::make_local(env, values_h()); 4223 } 4224 JVM_END 4225 4226 4227 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4228 jint javaThreadState, 4229 jintArray values)) 4230 { 4231 // If new thread states are added in future JDK and VM versions, 4232 // this should check if the JDK version is compatible with thread 4233 // states supported by the VM. Return NULL if not compatible. 4234 // 4235 // This function must map the VM java_lang_Thread::ThreadStatus 4236 // to the Java thread state that the JDK supports. 4237 // 4238 4239 ResourceMark rm; 4240 4241 // Check if threads is null 4242 if (values == NULL) { 4243 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4244 } 4245 4246 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4247 typeArrayHandle values_h(THREAD, v); 4248 4249 objArrayHandle names_h; 4250 switch (javaThreadState) { 4251 case JAVA_THREAD_STATE_NEW : { 4252 assert(values_h->length() == 1 && 4253 values_h->int_at(0) == java_lang_Thread::NEW, 4254 "Invalid threadStatus value"); 4255 4256 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4257 1, /* only 1 substate */ 4258 CHECK_NULL); 4259 names_h = objArrayHandle(THREAD, r); 4260 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4261 names_h->obj_at_put(0, name()); 4262 break; 4263 } 4264 case JAVA_THREAD_STATE_RUNNABLE : { 4265 assert(values_h->length() == 1 && 4266 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4267 "Invalid threadStatus value"); 4268 4269 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4270 1, /* only 1 substate */ 4271 CHECK_NULL); 4272 names_h = objArrayHandle(THREAD, r); 4273 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4274 names_h->obj_at_put(0, name()); 4275 break; 4276 } 4277 case JAVA_THREAD_STATE_BLOCKED : { 4278 assert(values_h->length() == 1 && 4279 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4280 "Invalid threadStatus value"); 4281 4282 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4283 1, /* only 1 substate */ 4284 CHECK_NULL); 4285 names_h = objArrayHandle(THREAD, r); 4286 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4287 names_h->obj_at_put(0, name()); 4288 break; 4289 } 4290 case JAVA_THREAD_STATE_WAITING : { 4291 assert(values_h->length() == 2 && 4292 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4293 values_h->int_at(1) == java_lang_Thread::PARKED, 4294 "Invalid threadStatus value"); 4295 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4296 2, /* number of substates */ 4297 CHECK_NULL); 4298 names_h = objArrayHandle(THREAD, r); 4299 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4300 CHECK_NULL); 4301 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4302 CHECK_NULL); 4303 names_h->obj_at_put(0, name0()); 4304 names_h->obj_at_put(1, name1()); 4305 break; 4306 } 4307 case JAVA_THREAD_STATE_TIMED_WAITING : { 4308 assert(values_h->length() == 3 && 4309 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4310 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4311 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4312 "Invalid threadStatus value"); 4313 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4314 3, /* number of substates */ 4315 CHECK_NULL); 4316 names_h = objArrayHandle(THREAD, r); 4317 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4318 CHECK_NULL); 4319 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4320 CHECK_NULL); 4321 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4322 CHECK_NULL); 4323 names_h->obj_at_put(0, name0()); 4324 names_h->obj_at_put(1, name1()); 4325 names_h->obj_at_put(2, name2()); 4326 break; 4327 } 4328 case JAVA_THREAD_STATE_TERMINATED : { 4329 assert(values_h->length() == 1 && 4330 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4331 "Invalid threadStatus value"); 4332 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4333 1, /* only 1 substate */ 4334 CHECK_NULL); 4335 names_h = objArrayHandle(THREAD, r); 4336 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4337 names_h->obj_at_put(0, name()); 4338 break; 4339 } 4340 default: 4341 // Unknown state - probably incompatible JDK version 4342 return NULL; 4343 } 4344 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4345 } 4346 JVM_END 4347 4348 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4349 { 4350 memset(info, 0, sizeof(info_size)); 4351 4352 info->jvm_version = Abstract_VM_Version::jvm_version(); 4353 info->update_version = 0; /* 0 in HotSpot Express VM */ 4354 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4355 4356 // when we add a new capability in the jvm_version_info struct, we should also 4357 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4358 // counter defined in runtimeService.cpp. 4359 info->is_attachable = AttachListener::is_attach_supported(); 4360 } 4361 JVM_END