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 #ifndef USDT2 86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 87 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 88 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 89 #endif /* !USDT2 */ 90 91 /* 92 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 93 such ctors and calls MUST NOT come between an oop declaration/init and its 94 usage because if objects are move this may cause various memory stomps, bus 95 errors and segfaults. Here is a cookbook for causing so called "naked oop 96 failures": 97 98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 99 JVMWrapper("JVM_GetClassDeclaredFields"); 100 101 // Object address to be held directly in mirror & not visible to GC 102 oop mirror = JNIHandles::resolve_non_null(ofClass); 103 104 // If this ctor can hit a safepoint, moving objects around, then 105 ComplexConstructor foo; 106 107 // Boom! mirror may point to JUNK instead of the intended object 108 (some dereference of mirror) 109 110 // Here's another call that may block for GC, making mirror stale 111 MutexLocker ml(some_lock); 112 113 // And here's an initializer that can result in a stale oop 114 // all in one step. 115 oop o = call_that_can_throw_exception(TRAPS); 116 117 118 The solution is to keep the oop declaration BELOW the ctor or function 119 call that might cause a GC, do another resolve to reassign the oop, or 120 consider use of a Handle instead of an oop so there is immunity from object 121 motion. But note that the "QUICK" entries below do not have a handlemark 122 and thus can only support use of handles passed in. 123 */ 124 125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 126 ResourceMark rm; 127 int line_number = -1; 128 const char * source_file = NULL; 129 const char * trace = "explicit"; 130 InstanceKlass* caller = NULL; 131 JavaThread* jthread = JavaThread::current(); 132 if (jthread->has_last_Java_frame()) { 133 vframeStream vfst(jthread); 134 135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 140 141 Method* last_caller = NULL; 142 143 while (!vfst.at_end()) { 144 Method* m = vfst.method(); 145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 148 break; 149 } 150 last_caller = m; 151 vfst.next(); 152 } 153 // if this is called from Class.forName0 and that is called from Class.forName, 154 // then print the caller of Class.forName. If this is Class.loadClass, then print 155 // that caller, otherwise keep quiet since this should be picked up elsewhere. 156 bool found_it = false; 157 if (!vfst.at_end() && 158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 159 vfst.method()->name() == vmSymbols::forName0_name()) { 160 vfst.next(); 161 if (!vfst.at_end() && 162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 163 vfst.method()->name() == vmSymbols::forName_name()) { 164 vfst.next(); 165 found_it = true; 166 } 167 } else if (last_caller != NULL && 168 last_caller->method_holder()->name() == 169 vmSymbols::java_lang_ClassLoader() && 170 (last_caller->name() == vmSymbols::loadClassInternal_name() || 171 last_caller->name() == vmSymbols::loadClass_name())) { 172 found_it = true; 173 } else if (!vfst.at_end()) { 174 if (vfst.method()->is_native()) { 175 // JNI call 176 found_it = true; 177 } 178 } 179 if (found_it && !vfst.at_end()) { 180 // found the caller 181 caller = vfst.method()->method_holder(); 182 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 183 if (line_number == -1) { 184 // show method name if it's a native method 185 trace = vfst.method()->name_and_sig_as_C_string(); 186 } 187 Symbol* s = caller->source_file_name(); 188 if (s != NULL) { 189 source_file = s->as_C_string(); 190 } 191 } 192 } 193 if (caller != NULL) { 194 if (to_class != caller) { 195 const char * from = caller->external_name(); 196 const char * to = to_class->external_name(); 197 // print in a single call to reduce interleaving between threads 198 if (source_file != NULL) { 199 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 200 } else { 201 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 202 } 203 } 204 } 205 } 206 207 void trace_class_resolution(Klass* to_class) { 208 EXCEPTION_MARK; 209 trace_class_resolution_impl(to_class, THREAD); 210 if (HAS_PENDING_EXCEPTION) { 211 CLEAR_PENDING_EXCEPTION; 212 } 213 } 214 215 // Wrapper to trace JVM functions 216 217 #ifdef ASSERT 218 class JVMTraceWrapper : public StackObj { 219 public: 220 JVMTraceWrapper(const char* format, ...) { 221 if (TraceJVMCalls) { 222 va_list ap; 223 va_start(ap, format); 224 tty->print("JVM "); 225 tty->vprint_cr(format, ap); 226 va_end(ap); 227 } 228 } 229 }; 230 231 Histogram* JVMHistogram; 232 volatile jint JVMHistogram_lock = 0; 233 234 class JVMHistogramElement : public HistogramElement { 235 public: 236 JVMHistogramElement(const char* name); 237 }; 238 239 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 240 _name = elementName; 241 uintx count = 0; 242 243 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 244 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 245 count +=1; 246 if ( (WarnOnStalledSpinLock > 0) 247 && (count % WarnOnStalledSpinLock == 0)) { 248 warning("JVMHistogram_lock seems to be stalled"); 249 } 250 } 251 } 252 253 if(JVMHistogram == NULL) 254 JVMHistogram = new Histogram("JVM Call Counts",100); 255 256 JVMHistogram->add_element(this); 257 Atomic::dec(&JVMHistogram_lock); 258 } 259 260 #define JVMCountWrapper(arg) \ 261 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 262 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 263 264 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 265 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 266 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 267 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 268 #else 269 #define JVMWrapper(arg1) 270 #define JVMWrapper2(arg1, arg2) 271 #define JVMWrapper3(arg1, arg2, arg3) 272 #define JVMWrapper4(arg1, arg2, arg3, arg4) 273 #endif 274 275 276 // Interface version ///////////////////////////////////////////////////////////////////// 277 278 279 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 280 return JVM_INTERFACE_VERSION; 281 JVM_END 282 283 284 // java.lang.System ////////////////////////////////////////////////////////////////////// 285 286 287 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 288 JVMWrapper("JVM_CurrentTimeMillis"); 289 return os::javaTimeMillis(); 290 JVM_END 291 292 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 293 JVMWrapper("JVM_NanoTime"); 294 return os::javaTimeNanos(); 295 JVM_END 296 297 298 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 299 jobject dst, jint dst_pos, jint length)) 300 JVMWrapper("JVM_ArrayCopy"); 301 // Check if we have null pointers 302 if (src == NULL || dst == NULL) { 303 THROW(vmSymbols::java_lang_NullPointerException()); 304 } 305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 307 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 308 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 309 // Do copy 310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 311 JVM_END 312 313 314 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 315 JavaValue r(T_OBJECT); 316 // public synchronized Object put(Object key, Object value); 317 HandleMark hm(THREAD); 318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 320 JavaCalls::call_virtual(&r, 321 props, 322 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 323 vmSymbols::put_name(), 324 vmSymbols::object_object_object_signature(), 325 key_str, 326 value_str, 327 THREAD); 328 } 329 330 331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 332 333 334 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 335 JVMWrapper("JVM_InitProperties"); 336 ResourceMark rm; 337 338 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 339 340 // System property list includes both user set via -D option and 341 // jvm system specific properties. 342 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 343 PUTPROP(props, p->key(), p->value()); 344 } 345 346 // Convert the -XX:MaxDirectMemorySize= command line flag 347 // to the sun.nio.MaxDirectMemorySize property. 348 // Do this after setting user properties to prevent people 349 // from setting the value with a -D option, as requested. 350 { 351 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 352 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 353 } else { 354 char as_chars[256]; 355 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 357 } 358 } 359 360 // JVM monitoring and management support 361 // Add the sun.management.compiler property for the compiler's name 362 { 363 #undef CSIZE 364 #if defined(_LP64) || defined(_WIN64) 365 #define CSIZE "64-Bit " 366 #else 367 #define CSIZE 368 #endif // 64bit 369 370 #ifdef TIERED 371 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 372 #else 373 #if defined(COMPILER1) 374 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 375 #elif defined(COMPILER2) 376 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 377 #else 378 const char* compiler_name = ""; 379 #endif // compilers 380 #endif // TIERED 381 382 if (*compiler_name != '\0' && 383 (Arguments::mode() != Arguments::_int)) { 384 PUTPROP(props, "sun.management.compiler", compiler_name); 385 } 386 } 387 388 return properties; 389 JVM_END 390 391 392 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 393 394 extern volatile jint vm_created; 395 396 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 397 if (vm_created != 0 && (code == 0)) { 398 // The VM is about to exit. We call back into Java to check whether finalizers should be run 399 Universe::run_finalizers_on_exit(); 400 } 401 before_exit(thread); 402 vm_exit(code); 403 JVM_END 404 405 406 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 407 before_exit(thread); 408 vm_exit(code); 409 JVM_END 410 411 412 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 413 register_on_exit_function(func); 414 JVM_END 415 416 417 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 418 JVMWrapper("JVM_GC"); 419 if (!DisableExplicitGC) { 420 Universe::heap()->collect(GCCause::_java_lang_system_gc); 421 } 422 JVM_END 423 424 425 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 426 JVMWrapper("JVM_MaxObjectInspectionAge"); 427 return Universe::heap()->millis_since_last_gc(); 428 JVM_END 429 430 431 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 432 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 433 JVM_END 434 435 436 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 437 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 438 JVM_END 439 440 static inline jlong convert_size_t_to_jlong(size_t val) { 441 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 442 NOT_LP64 (return (jlong)val;) 443 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 444 } 445 446 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 447 JVMWrapper("JVM_TotalMemory"); 448 size_t n = Universe::heap()->capacity(); 449 return convert_size_t_to_jlong(n); 450 JVM_END 451 452 453 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 454 JVMWrapper("JVM_FreeMemory"); 455 CollectedHeap* ch = Universe::heap(); 456 size_t n; 457 { 458 MutexLocker x(Heap_lock); 459 n = ch->capacity() - ch->used(); 460 } 461 return convert_size_t_to_jlong(n); 462 JVM_END 463 464 465 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 466 JVMWrapper("JVM_MaxMemory"); 467 size_t n = Universe::heap()->max_capacity(); 468 return convert_size_t_to_jlong(n); 469 JVM_END 470 471 472 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 473 JVMWrapper("JVM_ActiveProcessorCount"); 474 return os::active_processor_count(); 475 JVM_END 476 477 478 479 // java.lang.Throwable ////////////////////////////////////////////////////// 480 481 482 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 483 JVMWrapper("JVM_FillInStackTrace"); 484 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 485 java_lang_Throwable::fill_in_stack_trace(exception); 486 JVM_END 487 488 489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 490 JVMWrapper("JVM_GetStackTraceDepth"); 491 oop exception = JNIHandles::resolve(throwable); 492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 493 JVM_END 494 495 496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 497 JVMWrapper("JVM_GetStackTraceElement"); 498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 499 oop exception = JNIHandles::resolve(throwable); 500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 501 return JNIHandles::make_local(env, element); 502 JVM_END 503 504 505 // java.lang.Object /////////////////////////////////////////////// 506 507 508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 509 JVMWrapper("JVM_IHashCode"); 510 // as implemented in the classic virtual machine; return 0 if object is NULL 511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 512 JVM_END 513 514 515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 516 JVMWrapper("JVM_MonitorWait"); 517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 518 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 519 if (JvmtiExport::should_post_monitor_wait()) { 520 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 521 } 522 ObjectSynchronizer::wait(obj, ms, CHECK); 523 JVM_END 524 525 526 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 527 JVMWrapper("JVM_MonitorNotify"); 528 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 529 ObjectSynchronizer::notify(obj, CHECK); 530 JVM_END 531 532 533 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 534 JVMWrapper("JVM_MonitorNotifyAll"); 535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 536 ObjectSynchronizer::notifyall(obj, CHECK); 537 JVM_END 538 539 540 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 541 JVMWrapper("JVM_Clone"); 542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 543 const KlassHandle klass (THREAD, obj->klass()); 544 JvmtiVMObjectAllocEventCollector oam; 545 546 #ifdef ASSERT 547 // Just checking that the cloneable flag is set correct 548 if (obj->is_array()) { 549 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 550 } else { 551 guarantee(obj->is_instance(), "should be instanceOop"); 552 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 553 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 554 } 555 #endif 556 557 // Check if class of obj supports the Cloneable interface. 558 // All arrays are considered to be cloneable (See JLS 20.1.5) 559 if (!klass->is_cloneable()) { 560 ResourceMark rm(THREAD); 561 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 562 } 563 564 // Make shallow object copy 565 const int size = obj->size(); 566 oop new_obj = NULL; 567 if (obj->is_array()) { 568 const int length = ((arrayOop)obj())->length(); 569 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 570 } else { 571 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 572 } 573 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 574 // is modifying a reference field in the clonee, a non-oop-atomic copy might 575 // be suspended in the middle of copying the pointer and end up with parts 576 // of two different pointers in the field. Subsequent dereferences will crash. 577 // 4846409: an oop-copy of objects with long or double fields or arrays of same 578 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 579 // of oops. We know objects are aligned on a minimum of an jlong boundary. 580 // The same is true of StubRoutines::object_copy and the various oop_copy 581 // variants, and of the code generated by the inline_native_clone intrinsic. 582 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 583 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 584 (size_t)align_object_size(size) / HeapWordsPerLong); 585 // Clear the header 586 new_obj->init_mark(); 587 588 // Store check (mark entire object and let gc sort it out) 589 BarrierSet* bs = Universe::heap()->barrier_set(); 590 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 591 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 592 593 // Caution: this involves a java upcall, so the clone should be 594 // "gc-robust" by this stage. 595 if (klass->has_finalizer()) { 596 assert(obj->is_instance(), "should be instanceOop"); 597 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 598 } 599 600 return JNIHandles::make_local(env, oop(new_obj)); 601 JVM_END 602 603 // java.lang.Compiler //////////////////////////////////////////////////// 604 605 // The initial cuts of the HotSpot VM will not support JITs, and all existing 606 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 607 // functions are all silently ignored unless JVM warnings are printed. 608 609 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 610 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 611 JVM_END 612 613 614 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 615 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 616 return JNI_FALSE; 617 JVM_END 618 619 620 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 621 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 622 return JNI_FALSE; 623 JVM_END 624 625 626 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 627 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 628 return JNI_FALSE; 629 JVM_END 630 631 632 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 633 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 634 return NULL; 635 JVM_END 636 637 638 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 639 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 640 JVM_END 641 642 643 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 644 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 645 JVM_END 646 647 648 649 // Error message support ////////////////////////////////////////////////////// 650 651 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 652 JVMWrapper("JVM_GetLastErrorString"); 653 return (jint)os::lasterror(buf, len); 654 JVM_END 655 656 657 // java.io.File /////////////////////////////////////////////////////////////// 658 659 JVM_LEAF(char*, JVM_NativePath(char* path)) 660 JVMWrapper2("JVM_NativePath (%s)", path); 661 return os::native_path(path); 662 JVM_END 663 664 665 // Misc. class handling /////////////////////////////////////////////////////////// 666 667 668 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 669 JVMWrapper("JVM_GetCallerClass"); 670 671 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation. 672 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) { 673 Klass* k = thread->security_get_caller_class(depth); 674 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 675 } else { 676 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass 677 assert(depth == -1, "wrong handshake depth"); 678 } 679 680 // Getting the class of the caller frame. 681 // 682 // The call stack at this point looks something like this: 683 // 684 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 685 // [1] [ @CallerSensitive API.method ] 686 // [.] [ (skipped intermediate frames) ] 687 // [n] [ caller ] 688 vframeStream vfst(thread); 689 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 690 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 691 Method* m = vfst.method(); 692 assert(m != NULL, "sanity"); 693 switch (n) { 694 case 0: 695 // This must only be called from Reflection.getCallerClass 696 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 697 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 698 } 699 // fall-through 700 case 1: 701 // Frame 0 and 1 must be caller sensitive. 702 if (!m->caller_sensitive()) { 703 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 704 } 705 break; 706 default: 707 if (!m->is_ignored_by_security_stack_walk()) { 708 // We have reached the desired frame; return the holder class. 709 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 710 } 711 break; 712 } 713 } 714 return NULL; 715 JVM_END 716 717 718 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 719 JVMWrapper("JVM_FindPrimitiveClass"); 720 oop mirror = NULL; 721 BasicType t = name2type(utf); 722 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 723 mirror = Universe::java_mirror(t); 724 } 725 if (mirror == NULL) { 726 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 727 } else { 728 return (jclass) JNIHandles::make_local(env, mirror); 729 } 730 JVM_END 731 732 733 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 734 JVMWrapper("JVM_ResolveClass"); 735 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 736 JVM_END 737 738 739 // Returns a class loaded by the bootstrap class loader; or null 740 // if not found. ClassNotFoundException is not thrown. 741 // 742 // Rationale behind JVM_FindClassFromBootLoader 743 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 744 // b> because of (a) java.dll has a direct dependecy on the unexported 745 // private symbol "_JVM_FindClassFromClassLoader@20". 746 // c> the launcher cannot use the private symbol as it dynamically opens 747 // the entry point, so if something changes, the launcher will fail 748 // unexpectedly at runtime, it is safest for the launcher to dlopen a 749 // stable exported interface. 750 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 751 // signature to change from _JVM_FindClassFromClassLoader@20 to 752 // JVM_FindClassFromClassLoader and will not be backward compatible 753 // with older JDKs. 754 // Thus a public/stable exported entry point is the right solution, 755 // public here means public in linker semantics, and is exported only 756 // to the JDK, and is not intended to be a public API. 757 758 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 759 const char* name)) 760 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 761 762 // Java libraries should ensure that name is never null... 763 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 764 // It's impossible to create this class; the name cannot fit 765 // into the constant pool. 766 return NULL; 767 } 768 769 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 770 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 771 if (k == NULL) { 772 return NULL; 773 } 774 775 if (TraceClassResolution) { 776 trace_class_resolution(k); 777 } 778 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 779 JVM_END 780 781 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 782 jboolean init, jobject loader, 783 jboolean throwError)) 784 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 785 throwError ? "error" : "exception"); 786 // Java libraries should ensure that name is never null... 787 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 788 // It's impossible to create this class; the name cannot fit 789 // into the constant pool. 790 if (throwError) { 791 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 792 } else { 793 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 794 } 795 } 796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 797 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 798 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 799 Handle(), throwError, THREAD); 800 801 if (TraceClassResolution && result != NULL) { 802 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 803 } 804 return result; 805 JVM_END 806 807 808 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 809 jboolean init, jclass from)) 810 JVMWrapper2("JVM_FindClassFromClass %s", name); 811 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 812 // It's impossible to create this class; the name cannot fit 813 // into the constant pool. 814 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 815 } 816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 817 oop from_class_oop = JNIHandles::resolve(from); 818 Klass* from_class = (from_class_oop == NULL) 819 ? (Klass*)NULL 820 : java_lang_Class::as_Klass(from_class_oop); 821 oop class_loader = NULL; 822 oop protection_domain = NULL; 823 if (from_class != NULL) { 824 class_loader = from_class->class_loader(); 825 protection_domain = from_class->protection_domain(); 826 } 827 Handle h_loader(THREAD, class_loader); 828 Handle h_prot (THREAD, protection_domain); 829 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 830 h_prot, true, thread); 831 832 if (TraceClassResolution && result != NULL) { 833 // this function is generally only used for class loading during verification. 834 ResourceMark rm; 835 oop from_mirror = JNIHandles::resolve_non_null(from); 836 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 837 const char * from_name = from_class->external_name(); 838 839 oop mirror = JNIHandles::resolve_non_null(result); 840 Klass* to_class = java_lang_Class::as_Klass(mirror); 841 const char * to = to_class->external_name(); 842 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 843 } 844 845 return result; 846 JVM_END 847 848 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 849 if (loader.is_null()) { 850 return; 851 } 852 853 // check whether the current caller thread holds the lock or not. 854 // If not, increment the corresponding counter 855 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 856 ObjectSynchronizer::owner_self) { 857 counter->inc(); 858 } 859 } 860 861 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 862 // and JVM_DefineClassWithSourceCond() 863 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 864 jobject loader, const jbyte *buf, 865 jsize len, jobject pd, const char *source, 866 jboolean verify, TRAPS) { 867 if (source == NULL) source = "__JVM_DefineClass__"; 868 869 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 870 JavaThread* jt = (JavaThread*) THREAD; 871 872 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 873 ClassLoader::perf_define_appclass_selftime(), 874 ClassLoader::perf_define_appclasses(), 875 jt->get_thread_stat()->perf_recursion_counts_addr(), 876 jt->get_thread_stat()->perf_timers_addr(), 877 PerfClassTraceTime::DEFINE_CLASS); 878 879 if (UsePerfData) { 880 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 881 } 882 883 // Since exceptions can be thrown, class initialization can take place 884 // if name is NULL no check for class name in .class stream has to be made. 885 TempNewSymbol class_name = NULL; 886 if (name != NULL) { 887 const int str_len = (int)strlen(name); 888 if (str_len > Symbol::max_length()) { 889 // It's impossible to create this class; the name cannot fit 890 // into the constant pool. 891 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 892 } 893 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 894 } 895 896 ResourceMark rm(THREAD); 897 ClassFileStream st((u1*) buf, len, (char *)source); 898 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 899 if (UsePerfData) { 900 is_lock_held_by_thread(class_loader, 901 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 902 THREAD); 903 } 904 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 905 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 906 protection_domain, &st, 907 verify != 0, 908 CHECK_NULL); 909 910 if (TraceClassResolution && k != NULL) { 911 trace_class_resolution(k); 912 } 913 914 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 915 } 916 917 918 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 919 JVMWrapper2("JVM_DefineClass %s", name); 920 921 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 922 JVM_END 923 924 925 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 926 JVMWrapper2("JVM_DefineClassWithSource %s", name); 927 928 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 929 JVM_END 930 931 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 932 jobject loader, const jbyte *buf, 933 jsize len, jobject pd, 934 const char *source, jboolean verify)) 935 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 936 937 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 938 JVM_END 939 940 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 941 JVMWrapper("JVM_FindLoadedClass"); 942 ResourceMark rm(THREAD); 943 944 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 945 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 946 947 const char* str = java_lang_String::as_utf8_string(string()); 948 // Sanity check, don't expect null 949 if (str == NULL) return NULL; 950 951 const int str_len = (int)strlen(str); 952 if (str_len > Symbol::max_length()) { 953 // It's impossible to create this class; the name cannot fit 954 // into the constant pool. 955 return NULL; 956 } 957 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 958 959 // Security Note: 960 // The Java level wrapper will perform the necessary security check allowing 961 // us to pass the NULL as the initiating class loader. 962 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 963 if (UsePerfData) { 964 is_lock_held_by_thread(h_loader, 965 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 966 THREAD); 967 } 968 969 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 970 h_loader, 971 Handle(), 972 CHECK_NULL); 973 974 return (k == NULL) ? NULL : 975 (jclass) JNIHandles::make_local(env, k->java_mirror()); 976 JVM_END 977 978 979 // Reflection support ////////////////////////////////////////////////////////////////////////////// 980 981 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 982 assert (cls != NULL, "illegal class"); 983 JVMWrapper("JVM_GetClassName"); 984 JvmtiVMObjectAllocEventCollector oam; 985 ResourceMark rm(THREAD); 986 const char* name; 987 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 988 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 989 } else { 990 // Consider caching interned string in Klass 991 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 992 assert(k->is_klass(), "just checking"); 993 name = k->external_name(); 994 } 995 oop result = StringTable::intern((char*) name, CHECK_NULL); 996 return (jstring) JNIHandles::make_local(env, result); 997 JVM_END 998 999 1000 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1001 JVMWrapper("JVM_GetClassInterfaces"); 1002 JvmtiVMObjectAllocEventCollector oam; 1003 oop mirror = JNIHandles::resolve_non_null(cls); 1004 1005 // Special handling for primitive objects 1006 if (java_lang_Class::is_primitive(mirror)) { 1007 // Primitive objects does not have any interfaces 1008 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1009 return (jobjectArray) JNIHandles::make_local(env, r); 1010 } 1011 1012 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1013 // Figure size of result array 1014 int size; 1015 if (klass->oop_is_instance()) { 1016 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1017 } else { 1018 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1019 size = 2; 1020 } 1021 1022 // Allocate result array 1023 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1024 objArrayHandle result (THREAD, r); 1025 // Fill in result 1026 if (klass->oop_is_instance()) { 1027 // Regular instance klass, fill in all local interfaces 1028 for (int index = 0; index < size; index++) { 1029 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1030 result->obj_at_put(index, k->java_mirror()); 1031 } 1032 } else { 1033 // All arrays implement java.lang.Cloneable and java.io.Serializable 1034 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1035 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1036 } 1037 return (jobjectArray) JNIHandles::make_local(env, result()); 1038 JVM_END 1039 1040 1041 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1042 JVMWrapper("JVM_GetClassLoader"); 1043 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1044 return NULL; 1045 } 1046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1047 oop loader = k->class_loader(); 1048 return JNIHandles::make_local(env, loader); 1049 JVM_END 1050 1051 1052 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1053 JVMWrapper("JVM_IsInterface"); 1054 oop mirror = JNIHandles::resolve_non_null(cls); 1055 if (java_lang_Class::is_primitive(mirror)) { 1056 return JNI_FALSE; 1057 } 1058 Klass* k = java_lang_Class::as_Klass(mirror); 1059 jboolean result = k->is_interface(); 1060 assert(!result || k->oop_is_instance(), 1061 "all interfaces are instance types"); 1062 // The compiler intrinsic for isInterface tests the 1063 // Klass::_access_flags bits in the same way. 1064 return result; 1065 JVM_END 1066 1067 1068 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1069 JVMWrapper("JVM_GetClassSigners"); 1070 JvmtiVMObjectAllocEventCollector oam; 1071 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1072 // There are no signers for primitive types 1073 return NULL; 1074 } 1075 1076 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1077 1078 // If there are no signers set in the class, or if the class 1079 // is an array, return NULL. 1080 if (signers == NULL) return NULL; 1081 1082 // copy of the signers array 1083 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1084 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1085 for (int index = 0; index < signers->length(); index++) { 1086 signers_copy->obj_at_put(index, signers->obj_at(index)); 1087 } 1088 1089 // return the copy 1090 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1091 JVM_END 1092 1093 1094 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1095 JVMWrapper("JVM_SetClassSigners"); 1096 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1097 // This call is ignored for primitive types and arrays. 1098 // Signers are only set once, ClassLoader.java, and thus shouldn't 1099 // be called with an array. Only the bootstrap loader creates arrays. 1100 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1101 if (k->oop_is_instance()) { 1102 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1103 } 1104 } 1105 JVM_END 1106 1107 1108 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1109 JVMWrapper("JVM_GetProtectionDomain"); 1110 if (JNIHandles::resolve(cls) == NULL) { 1111 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1112 } 1113 1114 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1115 // Primitive types does not have a protection domain. 1116 return NULL; 1117 } 1118 1119 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1120 return (jobject) JNIHandles::make_local(env, pd); 1121 JVM_END 1122 1123 1124 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { 1125 // If there is a security manager and protection domain, check the access 1126 // in the protection domain, otherwise it is authorized. 1127 if (java_lang_System::has_security_manager()) { 1128 1129 // For bootstrapping, if pd implies method isn't in the JDK, allow 1130 // this context to revert to older behavior. 1131 // In this case the isAuthorized field in AccessControlContext is also not 1132 // present. 1133 if (Universe::protection_domain_implies_method() == NULL) { 1134 return true; 1135 } 1136 1137 // Whitelist certain access control contexts 1138 if (java_security_AccessControlContext::is_authorized(context)) { 1139 return true; 1140 } 1141 1142 oop prot = klass->protection_domain(); 1143 if (prot != NULL) { 1144 // Call pd.implies(new SecurityPermission("createAccessControlContext")) 1145 // in the new wrapper. 1146 methodHandle m(THREAD, Universe::protection_domain_implies_method()); 1147 Handle h_prot(THREAD, prot); 1148 JavaValue result(T_BOOLEAN); 1149 JavaCallArguments args(h_prot); 1150 JavaCalls::call(&result, m, &args, CHECK_false); 1151 return (result.get_jboolean() != 0); 1152 } 1153 } 1154 return true; 1155 } 1156 1157 // Create an AccessControlContext with a protection domain with null codesource 1158 // and null permissions - which gives no permissions. 1159 oop create_dummy_access_control_context(TRAPS) { 1160 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); 1161 // new ProtectionDomain(null,null); 1162 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); 1163 Handle null_pd(THREAD, null_protection_domain); 1164 1165 // new ProtectionDomain[] {pd}; 1166 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1167 context->obj_at_put(0, null_pd()); 1168 1169 // new AccessControlContext(new ProtectionDomain[] {pd}) 1170 objArrayHandle h_context(THREAD, context); 1171 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1172 return result; 1173 } 1174 1175 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1176 JVMWrapper("JVM_DoPrivileged"); 1177 1178 if (action == NULL) { 1179 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1180 } 1181 1182 // Compute the frame initiating the do privileged operation and setup the privileged stack 1183 vframeStream vfst(thread); 1184 vfst.security_get_caller_frame(1); 1185 1186 if (vfst.at_end()) { 1187 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1188 } 1189 1190 Method* method = vfst.method(); 1191 instanceKlassHandle klass (THREAD, method->method_holder()); 1192 1193 // Check that action object understands "Object run()" 1194 Handle h_context; 1195 if (context != NULL) { 1196 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1197 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1198 if (!authorized) { 1199 // Create an unprivileged access control object and call it's run function 1200 // instead. 1201 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1202 h_context = Handle(THREAD, noprivs); 1203 } 1204 } 1205 1206 // Check that action object understands "Object run()" 1207 Handle object (THREAD, JNIHandles::resolve(action)); 1208 1209 // get run() method 1210 Method* m_oop = object->klass()->uncached_lookup_method( 1211 vmSymbols::run_method_name(), 1212 vmSymbols::void_object_signature()); 1213 methodHandle m (THREAD, m_oop); 1214 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1215 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1216 } 1217 1218 // Stack allocated list of privileged stack elements 1219 PrivilegedElement pi; 1220 if (!vfst.at_end()) { 1221 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1222 thread->set_privileged_stack_top(&pi); 1223 } 1224 1225 1226 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1227 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1228 Handle pending_exception; 1229 JavaValue result(T_OBJECT); 1230 JavaCallArguments args(object); 1231 JavaCalls::call(&result, m, &args, THREAD); 1232 1233 // done with action, remove ourselves from the list 1234 if (!vfst.at_end()) { 1235 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1236 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1237 } 1238 1239 if (HAS_PENDING_EXCEPTION) { 1240 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1241 CLEAR_PENDING_EXCEPTION; 1242 1243 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1244 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1245 // Throw a java.security.PrivilegedActionException(Exception e) exception 1246 JavaCallArguments args(pending_exception); 1247 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1248 vmSymbols::exception_void_signature(), 1249 &args); 1250 } 1251 } 1252 1253 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1254 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1255 JVM_END 1256 1257 1258 // Returns the inherited_access_control_context field of the running thread. 1259 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1260 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1261 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1262 return JNIHandles::make_local(env, result); 1263 JVM_END 1264 1265 class RegisterArrayForGC { 1266 private: 1267 JavaThread *_thread; 1268 public: 1269 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1270 _thread = thread; 1271 _thread->register_array_for_gc(array); 1272 } 1273 1274 ~RegisterArrayForGC() { 1275 _thread->register_array_for_gc(NULL); 1276 } 1277 }; 1278 1279 1280 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1281 JVMWrapper("JVM_GetStackAccessControlContext"); 1282 if (!UsePrivilegedStack) return NULL; 1283 1284 ResourceMark rm(THREAD); 1285 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1286 JvmtiVMObjectAllocEventCollector oam; 1287 1288 // count the protection domains on the execution stack. We collapse 1289 // duplicate consecutive protection domains into a single one, as 1290 // well as stopping when we hit a privileged frame. 1291 1292 // Use vframeStream to iterate through Java frames 1293 vframeStream vfst(thread); 1294 1295 oop previous_protection_domain = NULL; 1296 Handle privileged_context(thread, NULL); 1297 bool is_privileged = false; 1298 oop protection_domain = NULL; 1299 1300 for(; !vfst.at_end(); vfst.next()) { 1301 // get method of frame 1302 Method* method = vfst.method(); 1303 intptr_t* frame_id = vfst.frame_id(); 1304 1305 // check the privileged frames to see if we have a match 1306 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1307 // this frame is privileged 1308 is_privileged = true; 1309 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1310 protection_domain = thread->privileged_stack_top()->protection_domain(); 1311 } else { 1312 protection_domain = method->method_holder()->protection_domain(); 1313 } 1314 1315 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1316 local_array->push(protection_domain); 1317 previous_protection_domain = protection_domain; 1318 } 1319 1320 if (is_privileged) break; 1321 } 1322 1323 1324 // either all the domains on the stack were system domains, or 1325 // we had a privileged system domain 1326 if (local_array->is_empty()) { 1327 if (is_privileged && privileged_context.is_null()) return NULL; 1328 1329 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1330 return JNIHandles::make_local(env, result); 1331 } 1332 1333 // the resource area must be registered in case of a gc 1334 RegisterArrayForGC ragc(thread, local_array); 1335 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1336 local_array->length(), CHECK_NULL); 1337 objArrayHandle h_context(thread, context); 1338 for (int index = 0; index < local_array->length(); index++) { 1339 h_context->obj_at_put(index, local_array->at(index)); 1340 } 1341 1342 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1343 1344 return JNIHandles::make_local(env, result); 1345 JVM_END 1346 1347 1348 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1349 JVMWrapper("JVM_IsArrayClass"); 1350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1351 return (k != NULL) && k->oop_is_array() ? true : false; 1352 JVM_END 1353 1354 1355 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1356 JVMWrapper("JVM_IsPrimitiveClass"); 1357 oop mirror = JNIHandles::resolve_non_null(cls); 1358 return (jboolean) java_lang_Class::is_primitive(mirror); 1359 JVM_END 1360 1361 1362 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1363 JVMWrapper("JVM_GetComponentType"); 1364 oop mirror = JNIHandles::resolve_non_null(cls); 1365 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1366 return (jclass) JNIHandles::make_local(env, result); 1367 JVM_END 1368 1369 1370 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1371 JVMWrapper("JVM_GetClassModifiers"); 1372 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1373 // Primitive type 1374 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1375 } 1376 1377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1378 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1379 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1380 return k->modifier_flags(); 1381 JVM_END 1382 1383 1384 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1385 1386 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1387 JvmtiVMObjectAllocEventCollector oam; 1388 // ofClass is a reference to a java_lang_Class object. The mirror object 1389 // of an InstanceKlass 1390 1391 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1392 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1393 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1394 return (jobjectArray)JNIHandles::make_local(env, result); 1395 } 1396 1397 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1398 InnerClassesIterator iter(k); 1399 1400 if (iter.length() == 0) { 1401 // Neither an inner nor outer class 1402 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1403 return (jobjectArray)JNIHandles::make_local(env, result); 1404 } 1405 1406 // find inner class info 1407 constantPoolHandle cp(thread, k->constants()); 1408 int length = iter.length(); 1409 1410 // Allocate temp. result array 1411 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1412 objArrayHandle result (THREAD, r); 1413 int members = 0; 1414 1415 for (; !iter.done(); iter.next()) { 1416 int ioff = iter.inner_class_info_index(); 1417 int ooff = iter.outer_class_info_index(); 1418 1419 if (ioff != 0 && ooff != 0) { 1420 // Check to see if the name matches the class we're looking for 1421 // before attempting to find the class. 1422 if (cp->klass_name_at_matches(k, ooff)) { 1423 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1424 if (outer_klass == k()) { 1425 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1426 instanceKlassHandle inner_klass (THREAD, ik); 1427 1428 // Throws an exception if outer klass has not declared k as 1429 // an inner klass 1430 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1431 1432 result->obj_at_put(members, inner_klass->java_mirror()); 1433 members++; 1434 } 1435 } 1436 } 1437 } 1438 1439 if (members != length) { 1440 // Return array of right length 1441 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1442 for(int i = 0; i < members; i++) { 1443 res->obj_at_put(i, result->obj_at(i)); 1444 } 1445 return (jobjectArray)JNIHandles::make_local(env, res); 1446 } 1447 1448 return (jobjectArray)JNIHandles::make_local(env, result()); 1449 JVM_END 1450 1451 1452 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1453 { 1454 // ofClass is a reference to a java_lang_Class object. 1455 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1456 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1457 return NULL; 1458 } 1459 1460 bool inner_is_member = false; 1461 Klass* outer_klass 1462 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1463 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1464 if (outer_klass == NULL) return NULL; // already a top-level class 1465 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1466 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1467 } 1468 JVM_END 1469 1470 // should be in InstanceKlass.cpp, but is here for historical reasons 1471 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1472 bool* inner_is_member, 1473 TRAPS) { 1474 Thread* thread = THREAD; 1475 InnerClassesIterator iter(k); 1476 if (iter.length() == 0) { 1477 // No inner class info => no declaring class 1478 return NULL; 1479 } 1480 1481 constantPoolHandle i_cp(thread, k->constants()); 1482 1483 bool found = false; 1484 Klass* ok; 1485 instanceKlassHandle outer_klass; 1486 *inner_is_member = false; 1487 1488 // Find inner_klass attribute 1489 for (; !iter.done() && !found; iter.next()) { 1490 int ioff = iter.inner_class_info_index(); 1491 int ooff = iter.outer_class_info_index(); 1492 int noff = iter.inner_name_index(); 1493 if (ioff != 0) { 1494 // Check to see if the name matches the class we're looking for 1495 // before attempting to find the class. 1496 if (i_cp->klass_name_at_matches(k, ioff)) { 1497 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1498 found = (k() == inner_klass); 1499 if (found && ooff != 0) { 1500 ok = i_cp->klass_at(ooff, CHECK_NULL); 1501 outer_klass = instanceKlassHandle(thread, ok); 1502 *inner_is_member = true; 1503 } 1504 } 1505 } 1506 } 1507 1508 if (found && outer_klass.is_null()) { 1509 // It may be anonymous; try for that. 1510 int encl_method_class_idx = k->enclosing_method_class_index(); 1511 if (encl_method_class_idx != 0) { 1512 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1513 outer_klass = instanceKlassHandle(thread, ok); 1514 *inner_is_member = false; 1515 } 1516 } 1517 1518 // If no inner class attribute found for this class. 1519 if (outer_klass.is_null()) return NULL; 1520 1521 // Throws an exception if outer klass has not declared k as an inner klass 1522 // We need evidence that each klass knows about the other, or else 1523 // the system could allow a spoof of an inner class to gain access rights. 1524 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1525 return outer_klass(); 1526 } 1527 1528 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1529 assert (cls != NULL, "illegal class"); 1530 JVMWrapper("JVM_GetClassSignature"); 1531 JvmtiVMObjectAllocEventCollector oam; 1532 ResourceMark rm(THREAD); 1533 // Return null for arrays and primatives 1534 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1535 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1536 if (k->oop_is_instance()) { 1537 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1538 if (sym == NULL) return NULL; 1539 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1540 return (jstring) JNIHandles::make_local(env, str()); 1541 } 1542 } 1543 return NULL; 1544 JVM_END 1545 1546 1547 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1548 assert (cls != NULL, "illegal class"); 1549 JVMWrapper("JVM_GetClassAnnotations"); 1550 1551 // Return null for arrays and primitives 1552 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1554 if (k->oop_is_instance()) { 1555 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1556 return (jbyteArray) JNIHandles::make_local(env, a); 1557 } 1558 } 1559 return NULL; 1560 JVM_END 1561 1562 1563 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1564 // some of this code was adapted from from jni_FromReflectedField 1565 1566 oop reflected = JNIHandles::resolve_non_null(field); 1567 oop mirror = java_lang_reflect_Field::clazz(reflected); 1568 Klass* k = java_lang_Class::as_Klass(mirror); 1569 int slot = java_lang_reflect_Field::slot(reflected); 1570 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1571 1572 KlassHandle kh(THREAD, k); 1573 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1574 1575 if (modifiers & JVM_ACC_STATIC) { 1576 // for static fields we only look in the current class 1577 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1578 assert(false, "cannot find static field"); 1579 return false; 1580 } 1581 } else { 1582 // for instance fields we start with the current class and work 1583 // our way up through the superclass chain 1584 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1585 assert(false, "cannot find instance field"); 1586 return false; 1587 } 1588 } 1589 return true; 1590 } 1591 1592 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1593 // field is a handle to a java.lang.reflect.Field object 1594 assert(field != NULL, "illegal field"); 1595 JVMWrapper("JVM_GetFieldAnnotations"); 1596 1597 fieldDescriptor fd; 1598 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1599 if (!gotFd) { 1600 return NULL; 1601 } 1602 1603 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1604 JVM_END 1605 1606 1607 static Method* jvm_get_method_common(jobject method) { 1608 // some of this code was adapted from from jni_FromReflectedMethod 1609 1610 oop reflected = JNIHandles::resolve_non_null(method); 1611 oop mirror = NULL; 1612 int slot = 0; 1613 1614 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1615 mirror = java_lang_reflect_Constructor::clazz(reflected); 1616 slot = java_lang_reflect_Constructor::slot(reflected); 1617 } else { 1618 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1619 "wrong type"); 1620 mirror = java_lang_reflect_Method::clazz(reflected); 1621 slot = java_lang_reflect_Method::slot(reflected); 1622 } 1623 Klass* k = java_lang_Class::as_Klass(mirror); 1624 1625 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1626 assert(m != NULL, "cannot find method"); 1627 return m; // caller has to deal with NULL in product mode 1628 } 1629 1630 1631 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1632 JVMWrapper("JVM_GetMethodAnnotations"); 1633 1634 // method is a handle to a java.lang.reflect.Method object 1635 Method* m = jvm_get_method_common(method); 1636 if (m == NULL) { 1637 return NULL; 1638 } 1639 1640 return (jbyteArray) JNIHandles::make_local(env, 1641 Annotations::make_java_array(m->annotations(), THREAD)); 1642 JVM_END 1643 1644 1645 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1646 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1647 1648 // method is a handle to a java.lang.reflect.Method object 1649 Method* m = jvm_get_method_common(method); 1650 if (m == NULL) { 1651 return NULL; 1652 } 1653 1654 return (jbyteArray) JNIHandles::make_local(env, 1655 Annotations::make_java_array(m->annotation_default(), THREAD)); 1656 JVM_END 1657 1658 1659 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1660 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1661 1662 // method is a handle to a java.lang.reflect.Method object 1663 Method* m = jvm_get_method_common(method); 1664 if (m == NULL) { 1665 return NULL; 1666 } 1667 1668 return (jbyteArray) JNIHandles::make_local(env, 1669 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1670 JVM_END 1671 1672 /* Type use annotations support (JDK 1.8) */ 1673 1674 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1675 assert (cls != NULL, "illegal class"); 1676 JVMWrapper("JVM_GetClassTypeAnnotations"); 1677 ResourceMark rm(THREAD); 1678 // Return null for arrays and primitives 1679 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1680 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1681 if (k->oop_is_instance()) { 1682 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1683 if (type_annotations != NULL) { 1684 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1685 return (jbyteArray) JNIHandles::make_local(env, a); 1686 } 1687 } 1688 } 1689 return NULL; 1690 JVM_END 1691 1692 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1693 assert (method != NULL, "illegal method"); 1694 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1695 1696 // method is a handle to a java.lang.reflect.Method object 1697 Method* m = jvm_get_method_common(method); 1698 if (m == NULL) { 1699 return NULL; 1700 } 1701 1702 AnnotationArray* type_annotations = m->type_annotations(); 1703 if (type_annotations != NULL) { 1704 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1705 return (jbyteArray) JNIHandles::make_local(env, a); 1706 } 1707 1708 return NULL; 1709 JVM_END 1710 1711 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1712 assert (field != NULL, "illegal field"); 1713 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1714 1715 fieldDescriptor fd; 1716 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1717 if (!gotFd) { 1718 return NULL; 1719 } 1720 1721 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1722 JVM_END 1723 1724 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1725 if (!cp->is_within_bounds(index)) { 1726 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1727 } 1728 } 1729 1730 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1731 { 1732 JVMWrapper("JVM_GetMethodParameters"); 1733 // method is a handle to a java.lang.reflect.Method object 1734 Method* method_ptr = jvm_get_method_common(method); 1735 methodHandle mh (THREAD, method_ptr); 1736 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1737 const int num_params = mh->method_parameters_length(); 1738 1739 if (0 != num_params) { 1740 // make sure all the symbols are properly formatted 1741 for (int i = 0; i < num_params; i++) { 1742 MethodParametersElement* params = mh->method_parameters_start(); 1743 int index = params[i].name_cp_index; 1744 bounds_check(mh->constants(), index, CHECK_NULL); 1745 1746 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1747 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1748 "Wrong type at constant pool index"); 1749 } 1750 1751 } 1752 1753 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1754 objArrayHandle result (THREAD, result_oop); 1755 1756 for (int i = 0; i < num_params; i++) { 1757 MethodParametersElement* params = mh->method_parameters_start(); 1758 // For a 0 index, give a NULL symbol 1759 Symbol* sym = 0 != params[i].name_cp_index ? 1760 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1761 int flags = params[i].flags; 1762 oop param = Reflection::new_parameter(reflected_method, i, sym, 1763 flags, CHECK_NULL); 1764 result->obj_at_put(i, param); 1765 } 1766 return (jobjectArray)JNIHandles::make_local(env, result()); 1767 } else { 1768 return (jobjectArray)NULL; 1769 } 1770 } 1771 JVM_END 1772 1773 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1774 1775 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1776 { 1777 JVMWrapper("JVM_GetClassDeclaredFields"); 1778 JvmtiVMObjectAllocEventCollector oam; 1779 1780 // Exclude primitive types and array types 1781 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1782 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1783 // Return empty array 1784 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1785 return (jobjectArray) JNIHandles::make_local(env, res); 1786 } 1787 1788 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1789 constantPoolHandle cp(THREAD, k->constants()); 1790 1791 // Ensure class is linked 1792 k->link_class(CHECK_NULL); 1793 1794 // 4496456 We need to filter out java.lang.Throwable.backtrace 1795 bool skip_backtrace = false; 1796 1797 // Allocate result 1798 int num_fields; 1799 1800 if (publicOnly) { 1801 num_fields = 0; 1802 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1803 if (fs.access_flags().is_public()) ++num_fields; 1804 } 1805 } else { 1806 num_fields = k->java_fields_count(); 1807 1808 if (k() == SystemDictionary::Throwable_klass()) { 1809 num_fields--; 1810 skip_backtrace = true; 1811 } 1812 } 1813 1814 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1815 objArrayHandle result (THREAD, r); 1816 1817 int out_idx = 0; 1818 fieldDescriptor fd; 1819 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1820 if (skip_backtrace) { 1821 // 4496456 skip java.lang.Throwable.backtrace 1822 int offset = fs.offset(); 1823 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1824 } 1825 1826 if (!publicOnly || fs.access_flags().is_public()) { 1827 fd.initialize(k(), fs.index()); 1828 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1829 result->obj_at_put(out_idx, field); 1830 ++out_idx; 1831 } 1832 } 1833 assert(out_idx == num_fields, "just checking"); 1834 return (jobjectArray) JNIHandles::make_local(env, result()); 1835 } 1836 JVM_END 1837 1838 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1839 { 1840 JVMWrapper("JVM_GetClassDeclaredMethods"); 1841 JvmtiVMObjectAllocEventCollector oam; 1842 1843 // Exclude primitive types and array types 1844 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1845 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1846 // Return empty array 1847 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1848 return (jobjectArray) JNIHandles::make_local(env, res); 1849 } 1850 1851 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1852 1853 // Ensure class is linked 1854 k->link_class(CHECK_NULL); 1855 1856 Array<Method*>* methods = k->methods(); 1857 int methods_length = methods->length(); 1858 int num_methods = 0; 1859 1860 int i; 1861 for (i = 0; i < methods_length; i++) { 1862 methodHandle method(THREAD, methods->at(i)); 1863 if (!method->is_initializer() && !method->is_overpass()) { 1864 if (!publicOnly || method->is_public()) { 1865 ++num_methods; 1866 } 1867 } 1868 } 1869 1870 // Allocate result 1871 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1872 objArrayHandle result (THREAD, r); 1873 1874 int out_idx = 0; 1875 for (i = 0; i < methods_length; i++) { 1876 methodHandle method(THREAD, methods->at(i)); 1877 if (!method->is_initializer() && !method->is_overpass()) { 1878 if (!publicOnly || method->is_public()) { 1879 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1880 result->obj_at_put(out_idx, m); 1881 ++out_idx; 1882 } 1883 } 1884 } 1885 assert(out_idx == num_methods, "just checking"); 1886 return (jobjectArray) JNIHandles::make_local(env, result()); 1887 } 1888 JVM_END 1889 1890 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1891 { 1892 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1893 JvmtiVMObjectAllocEventCollector oam; 1894 1895 // Exclude primitive types and array types 1896 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1897 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1898 // Return empty array 1899 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1900 return (jobjectArray) JNIHandles::make_local(env, res); 1901 } 1902 1903 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1904 1905 // Ensure class is linked 1906 k->link_class(CHECK_NULL); 1907 1908 Array<Method*>* methods = k->methods(); 1909 int methods_length = methods->length(); 1910 int num_constructors = 0; 1911 1912 int i; 1913 for (i = 0; i < methods_length; i++) { 1914 methodHandle method(THREAD, methods->at(i)); 1915 if (method->is_initializer() && !method->is_static()) { 1916 if (!publicOnly || method->is_public()) { 1917 ++num_constructors; 1918 } 1919 } 1920 } 1921 1922 // Allocate result 1923 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1924 objArrayHandle result(THREAD, r); 1925 1926 int out_idx = 0; 1927 for (i = 0; i < methods_length; i++) { 1928 methodHandle method(THREAD, methods->at(i)); 1929 if (method->is_initializer() && !method->is_static()) { 1930 if (!publicOnly || method->is_public()) { 1931 oop m = Reflection::new_constructor(method, CHECK_NULL); 1932 result->obj_at_put(out_idx, m); 1933 ++out_idx; 1934 } 1935 } 1936 } 1937 assert(out_idx == num_constructors, "just checking"); 1938 return (jobjectArray) JNIHandles::make_local(env, result()); 1939 } 1940 JVM_END 1941 1942 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1943 { 1944 JVMWrapper("JVM_GetClassAccessFlags"); 1945 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1946 // Primitive type 1947 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1948 } 1949 1950 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1951 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1952 } 1953 JVM_END 1954 1955 1956 // Constant pool access ////////////////////////////////////////////////////////// 1957 1958 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1959 { 1960 JVMWrapper("JVM_GetClassConstantPool"); 1961 JvmtiVMObjectAllocEventCollector oam; 1962 1963 // Return null for primitives and arrays 1964 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1965 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1966 if (k->oop_is_instance()) { 1967 instanceKlassHandle k_h(THREAD, k); 1968 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1969 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1970 return JNIHandles::make_local(jcp()); 1971 } 1972 } 1973 return NULL; 1974 } 1975 JVM_END 1976 1977 1978 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1979 { 1980 JVMWrapper("JVM_ConstantPoolGetSize"); 1981 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1982 return cp->length(); 1983 } 1984 JVM_END 1985 1986 1987 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1988 { 1989 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1990 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1991 bounds_check(cp, index, CHECK_NULL); 1992 constantTag tag = cp->tag_at(index); 1993 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1994 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1995 } 1996 Klass* k = cp->klass_at(index, CHECK_NULL); 1997 return (jclass) JNIHandles::make_local(k->java_mirror()); 1998 } 1999 JVM_END 2000 2001 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2002 { 2003 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 2004 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2005 bounds_check(cp, index, CHECK_NULL); 2006 constantTag tag = cp->tag_at(index); 2007 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2008 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2009 } 2010 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2011 if (k == NULL) return NULL; 2012 return (jclass) JNIHandles::make_local(k->java_mirror()); 2013 } 2014 JVM_END 2015 2016 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2017 constantTag tag = cp->tag_at(index); 2018 if (!tag.is_method() && !tag.is_interface_method()) { 2019 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2020 } 2021 int klass_ref = cp->uncached_klass_ref_index_at(index); 2022 Klass* k_o; 2023 if (force_resolution) { 2024 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2025 } else { 2026 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2027 if (k_o == NULL) return NULL; 2028 } 2029 instanceKlassHandle k(THREAD, k_o); 2030 Symbol* name = cp->uncached_name_ref_at(index); 2031 Symbol* sig = cp->uncached_signature_ref_at(index); 2032 methodHandle m (THREAD, k->find_method(name, sig)); 2033 if (m.is_null()) { 2034 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2035 } 2036 oop method; 2037 if (!m->is_initializer() || m->is_static()) { 2038 method = Reflection::new_method(m, true, true, CHECK_NULL); 2039 } else { 2040 method = Reflection::new_constructor(m, CHECK_NULL); 2041 } 2042 return JNIHandles::make_local(method); 2043 } 2044 2045 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2046 { 2047 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2048 JvmtiVMObjectAllocEventCollector oam; 2049 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2050 bounds_check(cp, index, CHECK_NULL); 2051 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2052 return res; 2053 } 2054 JVM_END 2055 2056 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2057 { 2058 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2059 JvmtiVMObjectAllocEventCollector oam; 2060 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2061 bounds_check(cp, index, CHECK_NULL); 2062 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2063 return res; 2064 } 2065 JVM_END 2066 2067 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2068 constantTag tag = cp->tag_at(index); 2069 if (!tag.is_field()) { 2070 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2071 } 2072 int klass_ref = cp->uncached_klass_ref_index_at(index); 2073 Klass* k_o; 2074 if (force_resolution) { 2075 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2076 } else { 2077 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2078 if (k_o == NULL) return NULL; 2079 } 2080 instanceKlassHandle k(THREAD, k_o); 2081 Symbol* name = cp->uncached_name_ref_at(index); 2082 Symbol* sig = cp->uncached_signature_ref_at(index); 2083 fieldDescriptor fd; 2084 Klass* target_klass = k->find_field(name, sig, &fd); 2085 if (target_klass == NULL) { 2086 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2087 } 2088 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2089 return JNIHandles::make_local(field); 2090 } 2091 2092 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2093 { 2094 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2095 JvmtiVMObjectAllocEventCollector oam; 2096 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2097 bounds_check(cp, index, CHECK_NULL); 2098 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2099 return res; 2100 } 2101 JVM_END 2102 2103 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2104 { 2105 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2106 JvmtiVMObjectAllocEventCollector oam; 2107 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2108 bounds_check(cp, index, CHECK_NULL); 2109 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2110 return res; 2111 } 2112 JVM_END 2113 2114 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2115 { 2116 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2117 JvmtiVMObjectAllocEventCollector oam; 2118 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2119 bounds_check(cp, index, CHECK_NULL); 2120 constantTag tag = cp->tag_at(index); 2121 if (!tag.is_field_or_method()) { 2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2123 } 2124 int klass_ref = cp->uncached_klass_ref_index_at(index); 2125 Symbol* klass_name = cp->klass_name_at(klass_ref); 2126 Symbol* member_name = cp->uncached_name_ref_at(index); 2127 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2128 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2129 objArrayHandle dest(THREAD, dest_o); 2130 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2131 dest->obj_at_put(0, str()); 2132 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2133 dest->obj_at_put(1, str()); 2134 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2135 dest->obj_at_put(2, str()); 2136 return (jobjectArray) JNIHandles::make_local(dest()); 2137 } 2138 JVM_END 2139 2140 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2141 { 2142 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2143 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2144 bounds_check(cp, index, CHECK_0); 2145 constantTag tag = cp->tag_at(index); 2146 if (!tag.is_int()) { 2147 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2148 } 2149 return cp->int_at(index); 2150 } 2151 JVM_END 2152 2153 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2154 { 2155 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2156 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2157 bounds_check(cp, index, CHECK_(0L)); 2158 constantTag tag = cp->tag_at(index); 2159 if (!tag.is_long()) { 2160 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2161 } 2162 return cp->long_at(index); 2163 } 2164 JVM_END 2165 2166 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2167 { 2168 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2169 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2170 bounds_check(cp, index, CHECK_(0.0f)); 2171 constantTag tag = cp->tag_at(index); 2172 if (!tag.is_float()) { 2173 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2174 } 2175 return cp->float_at(index); 2176 } 2177 JVM_END 2178 2179 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2180 { 2181 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2182 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2183 bounds_check(cp, index, CHECK_(0.0)); 2184 constantTag tag = cp->tag_at(index); 2185 if (!tag.is_double()) { 2186 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2187 } 2188 return cp->double_at(index); 2189 } 2190 JVM_END 2191 2192 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2193 { 2194 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2195 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2196 bounds_check(cp, index, CHECK_NULL); 2197 constantTag tag = cp->tag_at(index); 2198 if (!tag.is_string()) { 2199 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2200 } 2201 oop str = cp->string_at(index, CHECK_NULL); 2202 return (jstring) JNIHandles::make_local(str); 2203 } 2204 JVM_END 2205 2206 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2207 { 2208 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2209 JvmtiVMObjectAllocEventCollector oam; 2210 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2211 bounds_check(cp, index, CHECK_NULL); 2212 constantTag tag = cp->tag_at(index); 2213 if (!tag.is_symbol()) { 2214 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2215 } 2216 Symbol* sym = cp->symbol_at(index); 2217 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2218 return (jstring) JNIHandles::make_local(str()); 2219 } 2220 JVM_END 2221 2222 2223 // Assertion support. ////////////////////////////////////////////////////////// 2224 2225 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2226 JVMWrapper("JVM_DesiredAssertionStatus"); 2227 assert(cls != NULL, "bad class"); 2228 2229 oop r = JNIHandles::resolve(cls); 2230 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2231 if (java_lang_Class::is_primitive(r)) return false; 2232 2233 Klass* k = java_lang_Class::as_Klass(r); 2234 assert(k->oop_is_instance(), "must be an instance klass"); 2235 if (! k->oop_is_instance()) return false; 2236 2237 ResourceMark rm(THREAD); 2238 const char* name = k->name()->as_C_string(); 2239 bool system_class = k->class_loader() == NULL; 2240 return JavaAssertions::enabled(name, system_class); 2241 2242 JVM_END 2243 2244 2245 // Return a new AssertionStatusDirectives object with the fields filled in with 2246 // command-line assertion arguments (i.e., -ea, -da). 2247 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2248 JVMWrapper("JVM_AssertionStatusDirectives"); 2249 JvmtiVMObjectAllocEventCollector oam; 2250 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2251 return JNIHandles::make_local(env, asd); 2252 JVM_END 2253 2254 // Verification //////////////////////////////////////////////////////////////////////////////// 2255 2256 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2257 2258 // RedefineClasses support: bug 6214132 caused verification to fail. 2259 // All functions from this section should call the jvmtiThreadSate function: 2260 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2261 // The function returns a Klass* of the _scratch_class if the verifier 2262 // was invoked in the middle of the class redefinition. 2263 // Otherwise it returns its argument value which is the _the_class Klass*. 2264 // Please, refer to the description in the jvmtiThreadSate.hpp. 2265 2266 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2267 JVMWrapper("JVM_GetClassNameUTF"); 2268 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2269 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2270 return k->name()->as_utf8(); 2271 JVM_END 2272 2273 2274 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2275 JVMWrapper("JVM_GetClassCPTypes"); 2276 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2278 // types will have length zero if this is not an InstanceKlass 2279 // (length is determined by call to JVM_GetClassCPEntriesCount) 2280 if (k->oop_is_instance()) { 2281 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2282 for (int index = cp->length() - 1; index >= 0; index--) { 2283 constantTag tag = cp->tag_at(index); 2284 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2285 } 2286 } 2287 JVM_END 2288 2289 2290 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2291 JVMWrapper("JVM_GetClassCPEntriesCount"); 2292 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2294 if (!k->oop_is_instance()) 2295 return 0; 2296 return InstanceKlass::cast(k)->constants()->length(); 2297 JVM_END 2298 2299 2300 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2301 JVMWrapper("JVM_GetClassFieldsCount"); 2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2303 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2304 if (!k->oop_is_instance()) 2305 return 0; 2306 return InstanceKlass::cast(k)->java_fields_count(); 2307 JVM_END 2308 2309 2310 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2311 JVMWrapper("JVM_GetClassMethodsCount"); 2312 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2313 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2314 if (!k->oop_is_instance()) 2315 return 0; 2316 return InstanceKlass::cast(k)->methods()->length(); 2317 JVM_END 2318 2319 2320 // The following methods, used for the verifier, are never called with 2321 // array klasses, so a direct cast to InstanceKlass is safe. 2322 // Typically, these methods are called in a loop with bounds determined 2323 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2324 // zero for arrays. 2325 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2326 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2329 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2330 int length = method->checked_exceptions_length(); 2331 if (length > 0) { 2332 CheckedExceptionElement* table= method->checked_exceptions_start(); 2333 for (int i = 0; i < length; i++) { 2334 exceptions[i] = table[i].class_cp_index; 2335 } 2336 } 2337 JVM_END 2338 2339 2340 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2341 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2344 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2345 return method->checked_exceptions_length(); 2346 JVM_END 2347 2348 2349 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2350 JVMWrapper("JVM_GetMethodIxByteCode"); 2351 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2352 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2353 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2354 memcpy(code, method->code_base(), method->code_size()); 2355 JVM_END 2356 2357 2358 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2359 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2363 return method->code_size(); 2364 JVM_END 2365 2366 2367 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2368 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2372 ExceptionTable extable(method); 2373 entry->start_pc = extable.start_pc(entry_index); 2374 entry->end_pc = extable.end_pc(entry_index); 2375 entry->handler_pc = extable.handler_pc(entry_index); 2376 entry->catchType = extable.catch_type_index(entry_index); 2377 JVM_END 2378 2379 2380 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2381 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2382 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2383 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2384 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2385 return method->exception_table_length(); 2386 JVM_END 2387 2388 2389 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2390 JVMWrapper("JVM_GetMethodIxModifiers"); 2391 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2392 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2393 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2394 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2395 JVM_END 2396 2397 2398 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2399 JVMWrapper("JVM_GetFieldIxModifiers"); 2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2402 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2403 JVM_END 2404 2405 2406 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2407 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2408 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2410 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2411 return method->max_locals(); 2412 JVM_END 2413 2414 2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2416 JVMWrapper("JVM_GetMethodIxArgsSize"); 2417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2419 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2420 return method->size_of_parameters(); 2421 JVM_END 2422 2423 2424 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2425 JVMWrapper("JVM_GetMethodIxMaxStack"); 2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2429 return method->verifier_max_stack(); 2430 JVM_END 2431 2432 2433 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2434 JVMWrapper("JVM_IsConstructorIx"); 2435 ResourceMark rm(THREAD); 2436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2438 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2439 return method->name() == vmSymbols::object_initializer_name(); 2440 JVM_END 2441 2442 2443 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2444 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2445 ResourceMark rm(THREAD); 2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2448 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2449 return method->is_overpass(); 2450 JVM_END 2451 2452 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2453 JVMWrapper("JVM_GetMethodIxIxUTF"); 2454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2455 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2456 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2457 return method->name()->as_utf8(); 2458 JVM_END 2459 2460 2461 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2462 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2465 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2466 return method->signature()->as_utf8(); 2467 JVM_END 2468 2469 /** 2470 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2471 * read entries in the constant pool. Since the old verifier always 2472 * works on a copy of the code, it will not see any rewriting that 2473 * may possibly occur in the middle of verification. So it is important 2474 * that nothing it calls tries to use the cpCache instead of the raw 2475 * constant pool, so we must use cp->uncached_x methods when appropriate. 2476 */ 2477 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2478 JVMWrapper("JVM_GetCPFieldNameUTF"); 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_Fieldref: 2484 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2485 default: 2486 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2487 } 2488 ShouldNotReachHere(); 2489 return NULL; 2490 JVM_END 2491 2492 2493 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2494 JVMWrapper("JVM_GetCPMethodNameUTF"); 2495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2496 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2497 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2498 switch (cp->tag_at(cp_index).value()) { 2499 case JVM_CONSTANT_InterfaceMethodref: 2500 case JVM_CONSTANT_Methodref: 2501 case JVM_CONSTANT_NameAndType: // for invokedynamic 2502 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2503 default: 2504 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2505 } 2506 ShouldNotReachHere(); 2507 return NULL; 2508 JVM_END 2509 2510 2511 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2512 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2515 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2516 switch (cp->tag_at(cp_index).value()) { 2517 case JVM_CONSTANT_InterfaceMethodref: 2518 case JVM_CONSTANT_Methodref: 2519 case JVM_CONSTANT_NameAndType: // for invokedynamic 2520 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2521 default: 2522 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2523 } 2524 ShouldNotReachHere(); 2525 return NULL; 2526 JVM_END 2527 2528 2529 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2530 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 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 switch (cp->tag_at(cp_index).value()) { 2535 case JVM_CONSTANT_Fieldref: 2536 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2537 default: 2538 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2539 } 2540 ShouldNotReachHere(); 2541 return NULL; 2542 JVM_END 2543 2544 2545 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2546 JVMWrapper("JVM_GetCPClassNameUTF"); 2547 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2548 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2549 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2550 Symbol* classname = cp->klass_name_at(cp_index); 2551 return classname->as_utf8(); 2552 JVM_END 2553 2554 2555 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2556 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2557 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2558 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2559 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2560 switch (cp->tag_at(cp_index).value()) { 2561 case JVM_CONSTANT_Fieldref: { 2562 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2563 Symbol* classname = cp->klass_name_at(class_index); 2564 return classname->as_utf8(); 2565 } 2566 default: 2567 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2568 } 2569 ShouldNotReachHere(); 2570 return NULL; 2571 JVM_END 2572 2573 2574 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2575 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2577 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2578 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2579 switch (cp->tag_at(cp_index).value()) { 2580 case JVM_CONSTANT_Methodref: 2581 case JVM_CONSTANT_InterfaceMethodref: { 2582 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2583 Symbol* classname = cp->klass_name_at(class_index); 2584 return classname->as_utf8(); 2585 } 2586 default: 2587 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2588 } 2589 ShouldNotReachHere(); 2590 return NULL; 2591 JVM_END 2592 2593 2594 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2595 JVMWrapper("JVM_GetCPFieldModifiers"); 2596 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2597 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2598 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2599 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2600 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2601 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2602 switch (cp->tag_at(cp_index).value()) { 2603 case JVM_CONSTANT_Fieldref: { 2604 Symbol* name = cp->uncached_name_ref_at(cp_index); 2605 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2606 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2607 if (fs.name() == name && fs.signature() == signature) { 2608 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2609 } 2610 } 2611 return -1; 2612 } 2613 default: 2614 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2615 } 2616 ShouldNotReachHere(); 2617 return 0; 2618 JVM_END 2619 2620 2621 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2622 JVMWrapper("JVM_GetCPMethodModifiers"); 2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2624 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2626 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2627 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2628 switch (cp->tag_at(cp_index).value()) { 2629 case JVM_CONSTANT_Methodref: 2630 case JVM_CONSTANT_InterfaceMethodref: { 2631 Symbol* name = cp->uncached_name_ref_at(cp_index); 2632 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2633 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2634 int methods_count = methods->length(); 2635 for (int i = 0; i < methods_count; i++) { 2636 Method* method = methods->at(i); 2637 if (method->name() == name && method->signature() == signature) { 2638 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2639 } 2640 } 2641 return -1; 2642 } 2643 default: 2644 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2645 } 2646 ShouldNotReachHere(); 2647 return 0; 2648 JVM_END 2649 2650 2651 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2652 2653 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2654 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2655 JVM_END 2656 2657 2658 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2659 JVMWrapper("JVM_IsSameClassPackage"); 2660 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2661 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2662 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2663 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2664 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2665 JVM_END 2666 2667 2668 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2669 2670 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2671 JVMWrapper2("JVM_Open (%s)", fname); 2672 2673 //%note jvm_r6 2674 int result = os::open(fname, flags, mode); 2675 if (result >= 0) { 2676 return result; 2677 } else { 2678 switch(errno) { 2679 case EEXIST: 2680 return JVM_EEXIST; 2681 default: 2682 return -1; 2683 } 2684 } 2685 JVM_END 2686 2687 2688 JVM_LEAF(jint, JVM_Close(jint fd)) 2689 JVMWrapper2("JVM_Close (0x%x)", fd); 2690 //%note jvm_r6 2691 return os::close(fd); 2692 JVM_END 2693 2694 2695 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2696 JVMWrapper2("JVM_Read (0x%x)", fd); 2697 2698 //%note jvm_r6 2699 return (jint)os::restartable_read(fd, buf, nbytes); 2700 JVM_END 2701 2702 2703 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2704 JVMWrapper2("JVM_Write (0x%x)", fd); 2705 2706 //%note jvm_r6 2707 return (jint)os::write(fd, buf, nbytes); 2708 JVM_END 2709 2710 2711 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2712 JVMWrapper2("JVM_Available (0x%x)", fd); 2713 //%note jvm_r6 2714 return os::available(fd, pbytes); 2715 JVM_END 2716 2717 2718 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2719 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2720 //%note jvm_r6 2721 return os::lseek(fd, offset, whence); 2722 JVM_END 2723 2724 2725 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2726 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2727 return os::ftruncate(fd, length); 2728 JVM_END 2729 2730 2731 JVM_LEAF(jint, JVM_Sync(jint fd)) 2732 JVMWrapper2("JVM_Sync (0x%x)", fd); 2733 //%note jvm_r6 2734 return os::fsync(fd); 2735 JVM_END 2736 2737 2738 // Printing support ////////////////////////////////////////////////// 2739 extern "C" { 2740 2741 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2742 // see bug 4399518, 4417214 2743 if ((intptr_t)count <= 0) return -1; 2744 return vsnprintf(str, count, fmt, args); 2745 } 2746 2747 2748 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2749 va_list args; 2750 int len; 2751 va_start(args, fmt); 2752 len = jio_vsnprintf(str, count, fmt, args); 2753 va_end(args); 2754 return len; 2755 } 2756 2757 2758 int jio_fprintf(FILE* f, const char *fmt, ...) { 2759 int len; 2760 va_list args; 2761 va_start(args, fmt); 2762 len = jio_vfprintf(f, fmt, args); 2763 va_end(args); 2764 return len; 2765 } 2766 2767 2768 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2769 if (Arguments::vfprintf_hook() != NULL) { 2770 return Arguments::vfprintf_hook()(f, fmt, args); 2771 } else { 2772 return vfprintf(f, fmt, args); 2773 } 2774 } 2775 2776 2777 JNIEXPORT int jio_printf(const char *fmt, ...) { 2778 int len; 2779 va_list args; 2780 va_start(args, fmt); 2781 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2782 va_end(args); 2783 return len; 2784 } 2785 2786 2787 // HotSpot specific jio method 2788 void jio_print(const char* s) { 2789 // Try to make this function as atomic as possible. 2790 if (Arguments::vfprintf_hook() != NULL) { 2791 jio_fprintf(defaultStream::output_stream(), "%s", s); 2792 } else { 2793 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2794 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2795 } 2796 } 2797 2798 } // Extern C 2799 2800 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2801 2802 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2803 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2804 // OSThread objects. The exception to this rule is when the target object is the thread 2805 // doing the operation, in which case we know that the thread won't exit until the 2806 // operation is done (all exits being voluntary). There are a few cases where it is 2807 // rather silly to do operations on yourself, like resuming yourself or asking whether 2808 // you are alive. While these can still happen, they are not subject to deadlocks if 2809 // the lock is held while the operation occurs (this is not the case for suspend, for 2810 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2811 // implementation is local to this file, we always lock Threads_lock for that one. 2812 2813 static void thread_entry(JavaThread* thread, TRAPS) { 2814 HandleMark hm(THREAD); 2815 Handle obj(THREAD, thread->threadObj()); 2816 JavaValue result(T_VOID); 2817 JavaCalls::call_virtual(&result, 2818 obj, 2819 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2820 vmSymbols::run_method_name(), 2821 vmSymbols::void_method_signature(), 2822 THREAD); 2823 } 2824 2825 2826 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2827 JVMWrapper("JVM_StartThread"); 2828 JavaThread *native_thread = NULL; 2829 2830 // We cannot hold the Threads_lock when we throw an exception, 2831 // due to rank ordering issues. Example: we might need to grab the 2832 // Heap_lock while we construct the exception. 2833 bool throw_illegal_thread_state = false; 2834 2835 // We must release the Threads_lock before we can post a jvmti event 2836 // in Thread::start. 2837 { 2838 // Ensure that the C++ Thread and OSThread structures aren't freed before 2839 // we operate. 2840 MutexLocker mu(Threads_lock); 2841 2842 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2843 // re-starting an already started thread, so we should usually find 2844 // that the JavaThread is null. However for a JNI attached thread 2845 // there is a small window between the Thread object being created 2846 // (with its JavaThread set) and the update to its threadStatus, so we 2847 // have to check for this 2848 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2849 throw_illegal_thread_state = true; 2850 } else { 2851 // We could also check the stillborn flag to see if this thread was already stopped, but 2852 // for historical reasons we let the thread detect that itself when it starts running 2853 2854 jlong size = 2855 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2856 // Allocate the C++ Thread structure and create the native thread. The 2857 // stack size retrieved from java is signed, but the constructor takes 2858 // size_t (an unsigned type), so avoid passing negative values which would 2859 // result in really large stacks. 2860 size_t sz = size > 0 ? (size_t) size : 0; 2861 native_thread = new JavaThread(&thread_entry, sz); 2862 2863 // At this point it may be possible that no osthread was created for the 2864 // JavaThread due to lack of memory. Check for this situation and throw 2865 // an exception if necessary. Eventually we may want to change this so 2866 // that we only grab the lock if the thread was created successfully - 2867 // then we can also do this check and throw the exception in the 2868 // JavaThread constructor. 2869 if (native_thread->osthread() != NULL) { 2870 // Note: the current thread is not being used within "prepare". 2871 native_thread->prepare(jthread); 2872 } 2873 } 2874 } 2875 2876 if (throw_illegal_thread_state) { 2877 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2878 } 2879 2880 assert(native_thread != NULL, "Starting null thread?"); 2881 2882 if (native_thread->osthread() == NULL) { 2883 // No one should hold a reference to the 'native_thread'. 2884 delete native_thread; 2885 if (JvmtiExport::should_post_resource_exhausted()) { 2886 JvmtiExport::post_resource_exhausted( 2887 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2888 "unable to create new native thread"); 2889 } 2890 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2891 "unable to create new native thread"); 2892 } 2893 2894 Thread::start(native_thread); 2895 2896 JVM_END 2897 2898 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2899 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2900 // but is thought to be reliable and simple. In the case, where the receiver is the 2901 // same thread as the sender, no safepoint is needed. 2902 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2903 JVMWrapper("JVM_StopThread"); 2904 2905 oop java_throwable = JNIHandles::resolve(throwable); 2906 if (java_throwable == NULL) { 2907 THROW(vmSymbols::java_lang_NullPointerException()); 2908 } 2909 oop java_thread = JNIHandles::resolve_non_null(jthread); 2910 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2911 Events::log_exception(JavaThread::current(), 2912 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2913 receiver, (address)java_thread, throwable); 2914 // First check if thread is alive 2915 if (receiver != NULL) { 2916 // Check if exception is getting thrown at self (use oop equality, since the 2917 // target object might exit) 2918 if (java_thread == thread->threadObj()) { 2919 THROW_OOP(java_throwable); 2920 } else { 2921 // Enques a VM_Operation to stop all threads and then deliver the exception... 2922 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2923 } 2924 } 2925 else { 2926 // Either: 2927 // - target thread has not been started before being stopped, or 2928 // - target thread already terminated 2929 // We could read the threadStatus to determine which case it is 2930 // but that is overkill as it doesn't matter. We must set the 2931 // stillborn flag for the first case, and if the thread has already 2932 // exited setting this flag has no affect 2933 java_lang_Thread::set_stillborn(java_thread); 2934 } 2935 JVM_END 2936 2937 2938 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2939 JVMWrapper("JVM_IsThreadAlive"); 2940 2941 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2942 return java_lang_Thread::is_alive(thread_oop); 2943 JVM_END 2944 2945 2946 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2947 JVMWrapper("JVM_SuspendThread"); 2948 oop java_thread = JNIHandles::resolve_non_null(jthread); 2949 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2950 2951 if (receiver != NULL) { 2952 // thread has run and has not exited (still on threads list) 2953 2954 { 2955 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2956 if (receiver->is_external_suspend()) { 2957 // Don't allow nested external suspend requests. We can't return 2958 // an error from this interface so just ignore the problem. 2959 return; 2960 } 2961 if (receiver->is_exiting()) { // thread is in the process of exiting 2962 return; 2963 } 2964 receiver->set_external_suspend(); 2965 } 2966 2967 // java_suspend() will catch threads in the process of exiting 2968 // and will ignore them. 2969 receiver->java_suspend(); 2970 2971 // It would be nice to have the following assertion in all the 2972 // time, but it is possible for a racing resume request to have 2973 // resumed this thread right after we suspended it. Temporarily 2974 // enable this assertion if you are chasing a different kind of 2975 // bug. 2976 // 2977 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2978 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2979 } 2980 JVM_END 2981 2982 2983 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2984 JVMWrapper("JVM_ResumeThread"); 2985 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2986 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2987 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2988 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2989 // looks at it. 2990 MutexLocker ml(Threads_lock); 2991 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2992 if (thr != NULL) { 2993 // the thread has run and is not in the process of exiting 2994 thr->java_resume(); 2995 } 2996 JVM_END 2997 2998 2999 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 3000 JVMWrapper("JVM_SetThreadPriority"); 3001 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3002 MutexLocker ml(Threads_lock); 3003 oop java_thread = JNIHandles::resolve_non_null(jthread); 3004 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 3005 JavaThread* thr = java_lang_Thread::thread(java_thread); 3006 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 3007 Thread::set_priority(thr, (ThreadPriority)prio); 3008 } 3009 JVM_END 3010 3011 3012 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 3013 JVMWrapper("JVM_Yield"); 3014 if (os::dont_yield()) return; 3015 #ifndef USDT2 3016 HS_DTRACE_PROBE0(hotspot, thread__yield); 3017 #else /* USDT2 */ 3018 HOTSPOT_THREAD_YIELD(); 3019 #endif /* USDT2 */ 3020 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3021 // Critical for similar threading behaviour 3022 if (ConvertYieldToSleep) { 3023 os::sleep(thread, MinSleepInterval, false); 3024 } else { 3025 os::yield(); 3026 } 3027 JVM_END 3028 3029 3030 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3031 JVMWrapper("JVM_Sleep"); 3032 3033 if (millis < 0) { 3034 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3035 } 3036 3037 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3038 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3039 } 3040 3041 // Save current thread state and restore it at the end of this block. 3042 // And set new thread state to SLEEPING. 3043 JavaThreadSleepState jtss(thread); 3044 3045 #ifndef USDT2 3046 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 3047 #else /* USDT2 */ 3048 HOTSPOT_THREAD_SLEEP_BEGIN( 3049 millis); 3050 #endif /* USDT2 */ 3051 3052 EventThreadSleep event; 3053 3054 if (millis == 0) { 3055 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3056 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3057 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3058 // for SOLARIS 3059 if (ConvertSleepToYield) { 3060 os::yield(); 3061 } else { 3062 ThreadState old_state = thread->osthread()->get_state(); 3063 thread->osthread()->set_state(SLEEPING); 3064 os::sleep(thread, MinSleepInterval, false); 3065 thread->osthread()->set_state(old_state); 3066 } 3067 } else { 3068 ThreadState old_state = thread->osthread()->get_state(); 3069 thread->osthread()->set_state(SLEEPING); 3070 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3071 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3072 // us while we were sleeping. We do not overwrite those. 3073 if (!HAS_PENDING_EXCEPTION) { 3074 if (event.should_commit()) { 3075 event.set_time(millis); 3076 event.commit(); 3077 } 3078 #ifndef USDT2 3079 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 3080 #else /* USDT2 */ 3081 HOTSPOT_THREAD_SLEEP_END( 3082 1); 3083 #endif /* USDT2 */ 3084 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3085 // to properly restore the thread state. That's likely wrong. 3086 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3087 } 3088 } 3089 thread->osthread()->set_state(old_state); 3090 } 3091 if (event.should_commit()) { 3092 event.set_time(millis); 3093 event.commit(); 3094 } 3095 #ifndef USDT2 3096 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 3097 #else /* USDT2 */ 3098 HOTSPOT_THREAD_SLEEP_END( 3099 0); 3100 #endif /* USDT2 */ 3101 JVM_END 3102 3103 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3104 JVMWrapper("JVM_CurrentThread"); 3105 oop jthread = thread->threadObj(); 3106 assert (thread != NULL, "no current thread!"); 3107 return JNIHandles::make_local(env, jthread); 3108 JVM_END 3109 3110 3111 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3112 JVMWrapper("JVM_CountStackFrames"); 3113 3114 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3115 oop java_thread = JNIHandles::resolve_non_null(jthread); 3116 bool throw_illegal_thread_state = false; 3117 int count = 0; 3118 3119 { 3120 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3121 // We need to re-resolve the java_thread, since a GC might have happened during the 3122 // acquire of the lock 3123 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3124 3125 if (thr == NULL) { 3126 // do nothing 3127 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3128 // Check whether this java thread has been suspended already. If not, throws 3129 // IllegalThreadStateException. We defer to throw that exception until 3130 // Threads_lock is released since loading exception class has to leave VM. 3131 // The correct way to test a thread is actually suspended is 3132 // wait_for_ext_suspend_completion(), but we can't call that while holding 3133 // the Threads_lock. The above tests are sufficient for our purposes 3134 // provided the walkability of the stack is stable - which it isn't 3135 // 100% but close enough for most practical purposes. 3136 throw_illegal_thread_state = true; 3137 } else { 3138 // Count all java activation, i.e., number of vframes 3139 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3140 // Native frames are not counted 3141 if (!vfst.method()->is_native()) count++; 3142 } 3143 } 3144 } 3145 3146 if (throw_illegal_thread_state) { 3147 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3148 "this thread is not suspended"); 3149 } 3150 return count; 3151 JVM_END 3152 3153 // Consider: A better way to implement JVM_Interrupt() is to acquire 3154 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3155 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3156 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3157 // outside the critical section. Threads_lock is hot so we want to minimize 3158 // the hold-time. A cleaner interface would be to decompose interrupt into 3159 // two steps. The 1st phase, performed under Threads_lock, would return 3160 // a closure that'd be invoked after Threads_lock was dropped. 3161 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3162 // admit spurious wakeups. 3163 3164 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3165 JVMWrapper("JVM_Interrupt"); 3166 3167 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3168 oop java_thread = JNIHandles::resolve_non_null(jthread); 3169 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3170 // We need to re-resolve the java_thread, since a GC might have happened during the 3171 // acquire of the lock 3172 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3173 if (thr != NULL) { 3174 Thread::interrupt(thr); 3175 } 3176 JVM_END 3177 3178 3179 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3180 JVMWrapper("JVM_IsInterrupted"); 3181 3182 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3183 oop java_thread = JNIHandles::resolve_non_null(jthread); 3184 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3185 // We need to re-resolve the java_thread, since a GC might have happened during the 3186 // acquire of the lock 3187 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3188 if (thr == NULL) { 3189 return JNI_FALSE; 3190 } else { 3191 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3192 } 3193 JVM_END 3194 3195 3196 // Return true iff the current thread has locked the object passed in 3197 3198 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3199 JVMWrapper("JVM_HoldsLock"); 3200 assert(THREAD->is_Java_thread(), "sanity check"); 3201 if (obj == NULL) { 3202 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3203 } 3204 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3205 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3206 JVM_END 3207 3208 3209 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3210 JVMWrapper("JVM_DumpAllStacks"); 3211 VM_PrintThreads op; 3212 VMThread::execute(&op); 3213 if (JvmtiExport::should_post_data_dump()) { 3214 JvmtiExport::post_data_dump(); 3215 } 3216 JVM_END 3217 3218 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3219 JVMWrapper("JVM_SetNativeThreadName"); 3220 ResourceMark rm(THREAD); 3221 oop java_thread = JNIHandles::resolve_non_null(jthread); 3222 JavaThread* thr = java_lang_Thread::thread(java_thread); 3223 // Thread naming only supported for the current thread, doesn't work for 3224 // target threads. 3225 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3226 // we don't set the name of an attached thread to avoid stepping 3227 // on other programs 3228 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3229 os::set_native_thread_name(thread_name); 3230 } 3231 JVM_END 3232 3233 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3234 3235 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3236 assert(jthread->is_Java_thread(), "must be a Java thread"); 3237 if (jthread->privileged_stack_top() == NULL) return false; 3238 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3239 oop loader = jthread->privileged_stack_top()->class_loader(); 3240 if (loader == NULL) return true; 3241 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3242 if (trusted) return true; 3243 } 3244 return false; 3245 } 3246 3247 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3248 JVMWrapper("JVM_CurrentLoadedClass"); 3249 ResourceMark rm(THREAD); 3250 3251 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3252 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3253 bool trusted = is_trusted_frame(thread, &vfst); 3254 if (trusted) return NULL; 3255 3256 Method* m = vfst.method(); 3257 if (!m->is_native()) { 3258 InstanceKlass* holder = m->method_holder(); 3259 oop loader = holder->class_loader(); 3260 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3261 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3262 } 3263 } 3264 } 3265 return NULL; 3266 JVM_END 3267 3268 3269 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3270 JVMWrapper("JVM_CurrentClassLoader"); 3271 ResourceMark rm(THREAD); 3272 3273 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3274 3275 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3276 bool trusted = is_trusted_frame(thread, &vfst); 3277 if (trusted) return NULL; 3278 3279 Method* m = vfst.method(); 3280 if (!m->is_native()) { 3281 InstanceKlass* holder = m->method_holder(); 3282 assert(holder->is_klass(), "just checking"); 3283 oop loader = holder->class_loader(); 3284 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3285 return JNIHandles::make_local(env, loader); 3286 } 3287 } 3288 } 3289 return NULL; 3290 JVM_END 3291 3292 3293 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3294 JVMWrapper("JVM_GetClassContext"); 3295 ResourceMark rm(THREAD); 3296 JvmtiVMObjectAllocEventCollector oam; 3297 vframeStream vfst(thread); 3298 3299 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3300 // This must only be called from SecurityManager.getClassContext 3301 Method* m = vfst.method(); 3302 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3303 m->name() == vmSymbols::getClassContext_name() && 3304 m->signature() == vmSymbols::void_class_array_signature())) { 3305 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3306 } 3307 } 3308 3309 // Collect method holders 3310 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3311 for (; !vfst.at_end(); vfst.security_next()) { 3312 Method* m = vfst.method(); 3313 // Native frames are not returned 3314 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3315 Klass* holder = m->method_holder(); 3316 assert(holder->is_klass(), "just checking"); 3317 klass_array->append(holder); 3318 } 3319 } 3320 3321 // Create result array of type [Ljava/lang/Class; 3322 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3323 // Fill in mirrors corresponding to method holders 3324 for (int i = 0; i < klass_array->length(); i++) { 3325 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3326 } 3327 3328 return (jobjectArray) JNIHandles::make_local(env, result); 3329 JVM_END 3330 3331 3332 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3333 JVMWrapper("JVM_ClassDepth"); 3334 ResourceMark rm(THREAD); 3335 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3336 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3337 3338 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3339 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3340 if (class_name_sym == NULL) { 3341 return -1; 3342 } 3343 3344 int depth = 0; 3345 3346 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3347 if (!vfst.method()->is_native()) { 3348 InstanceKlass* holder = vfst.method()->method_holder(); 3349 assert(holder->is_klass(), "just checking"); 3350 if (holder->name() == class_name_sym) { 3351 return depth; 3352 } 3353 depth++; 3354 } 3355 } 3356 return -1; 3357 JVM_END 3358 3359 3360 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3361 JVMWrapper("JVM_ClassLoaderDepth"); 3362 ResourceMark rm(THREAD); 3363 int depth = 0; 3364 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3365 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3366 bool trusted = is_trusted_frame(thread, &vfst); 3367 if (trusted) return -1; 3368 3369 Method* m = vfst.method(); 3370 if (!m->is_native()) { 3371 InstanceKlass* holder = m->method_holder(); 3372 assert(holder->is_klass(), "just checking"); 3373 oop loader = holder->class_loader(); 3374 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3375 return depth; 3376 } 3377 depth++; 3378 } 3379 } 3380 return -1; 3381 JVM_END 3382 3383 3384 // java.lang.Package //////////////////////////////////////////////////////////////// 3385 3386 3387 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3388 JVMWrapper("JVM_GetSystemPackage"); 3389 ResourceMark rm(THREAD); 3390 JvmtiVMObjectAllocEventCollector oam; 3391 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3392 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3393 return (jstring) JNIHandles::make_local(result); 3394 JVM_END 3395 3396 3397 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3398 JVMWrapper("JVM_GetSystemPackages"); 3399 JvmtiVMObjectAllocEventCollector oam; 3400 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3401 return (jobjectArray) JNIHandles::make_local(result); 3402 JVM_END 3403 3404 3405 // ObjectInputStream /////////////////////////////////////////////////////////////// 3406 3407 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3408 if (current_class == NULL) { 3409 return true; 3410 } 3411 if ((current_class == field_class) || access.is_public()) { 3412 return true; 3413 } 3414 3415 if (access.is_protected()) { 3416 // See if current_class is a subclass of field_class 3417 if (current_class->is_subclass_of(field_class)) { 3418 return true; 3419 } 3420 } 3421 3422 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3423 } 3424 3425 3426 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3427 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3428 JVMWrapper("JVM_AllocateNewObject"); 3429 JvmtiVMObjectAllocEventCollector oam; 3430 // Receiver is not used 3431 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3432 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3433 3434 // Cannot instantiate primitive types 3435 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3436 ResourceMark rm(THREAD); 3437 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3438 } 3439 3440 // Arrays not allowed here, must use JVM_AllocateNewArray 3441 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3442 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3443 ResourceMark rm(THREAD); 3444 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3445 } 3446 3447 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3448 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3449 3450 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3451 3452 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3453 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3454 3455 // Make sure klass is initialized, since we are about to instantiate one of them. 3456 curr_klass->initialize(CHECK_NULL); 3457 3458 methodHandle m (THREAD, 3459 init_klass->find_method(vmSymbols::object_initializer_name(), 3460 vmSymbols::void_method_signature())); 3461 if (m.is_null()) { 3462 ResourceMark rm(THREAD); 3463 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3464 Method::name_and_sig_as_C_string(init_klass(), 3465 vmSymbols::object_initializer_name(), 3466 vmSymbols::void_method_signature())); 3467 } 3468 3469 if (curr_klass == init_klass && !m->is_public()) { 3470 // Calling the constructor for class 'curr_klass'. 3471 // Only allow calls to a public no-arg constructor. 3472 // This path corresponds to creating an Externalizable object. 3473 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3474 } 3475 3476 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3477 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3478 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3479 } 3480 3481 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3482 // Call constructor m. This might call a constructor higher up in the hierachy 3483 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3484 3485 return JNIHandles::make_local(obj()); 3486 JVM_END 3487 3488 3489 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3490 JVMWrapper("JVM_AllocateNewArray"); 3491 JvmtiVMObjectAllocEventCollector oam; 3492 oop mirror = JNIHandles::resolve_non_null(currClass); 3493 3494 if (java_lang_Class::is_primitive(mirror)) { 3495 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3496 } 3497 Klass* k = java_lang_Class::as_Klass(mirror); 3498 oop result; 3499 3500 if (k->oop_is_typeArray()) { 3501 // typeArray 3502 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3503 } else if (k->oop_is_objArray()) { 3504 // objArray 3505 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3506 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3507 result = oak->allocate(length, CHECK_NULL); 3508 } else { 3509 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3510 } 3511 return JNIHandles::make_local(env, result); 3512 JVM_END 3513 3514 3515 // Return the first non-null class loader up the execution stack, or null 3516 // if only code from the null class loader is on the stack. 3517 3518 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3519 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3520 // UseNewReflection 3521 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3522 oop loader = vfst.method()->method_holder()->class_loader(); 3523 if (loader != NULL) { 3524 return JNIHandles::make_local(env, loader); 3525 } 3526 } 3527 return NULL; 3528 JVM_END 3529 3530 3531 // Load a class relative to the most recent class on the stack with a non-null 3532 // classloader. 3533 // This function has been deprecated and should not be considered part of the 3534 // specified JVM interface. 3535 3536 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3537 jclass currClass, jstring currClassName)) 3538 JVMWrapper("JVM_LoadClass0"); 3539 // Receiver is not used 3540 ResourceMark rm(THREAD); 3541 3542 // Class name argument is not guaranteed to be in internal format 3543 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3544 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3545 3546 const char* str = java_lang_String::as_utf8_string(string()); 3547 3548 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3549 // It's impossible to create this class; the name cannot fit 3550 // into the constant pool. 3551 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3552 } 3553 3554 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3555 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3556 // Find the most recent class on the stack with a non-null classloader 3557 oop loader = NULL; 3558 oop protection_domain = NULL; 3559 if (curr_klass.is_null()) { 3560 for (vframeStream vfst(thread); 3561 !vfst.at_end() && loader == NULL; 3562 vfst.next()) { 3563 if (!vfst.method()->is_native()) { 3564 InstanceKlass* holder = vfst.method()->method_holder(); 3565 loader = holder->class_loader(); 3566 protection_domain = holder->protection_domain(); 3567 } 3568 } 3569 } else { 3570 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3571 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3572 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3573 } 3574 Handle h_loader(THREAD, loader); 3575 Handle h_prot (THREAD, protection_domain); 3576 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3577 false, thread); 3578 if (TraceClassResolution && result != NULL) { 3579 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3580 } 3581 return result; 3582 JVM_END 3583 3584 3585 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3586 3587 3588 // resolve array handle and check arguments 3589 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3590 if (arr == NULL) { 3591 THROW_0(vmSymbols::java_lang_NullPointerException()); 3592 } 3593 oop a = JNIHandles::resolve_non_null(arr); 3594 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3595 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3596 } 3597 return arrayOop(a); 3598 } 3599 3600 3601 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3602 JVMWrapper("JVM_GetArrayLength"); 3603 arrayOop a = check_array(env, arr, false, CHECK_0); 3604 return a->length(); 3605 JVM_END 3606 3607 3608 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3609 JVMWrapper("JVM_Array_Get"); 3610 JvmtiVMObjectAllocEventCollector oam; 3611 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3612 jvalue value; 3613 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3614 oop box = Reflection::box(&value, type, CHECK_NULL); 3615 return JNIHandles::make_local(env, box); 3616 JVM_END 3617 3618 3619 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3620 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3621 jvalue value; 3622 value.i = 0; // to initialize value before getting used in CHECK 3623 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3624 assert(a->is_typeArray(), "just checking"); 3625 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3626 BasicType wide_type = (BasicType) wCode; 3627 if (type != wide_type) { 3628 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3629 } 3630 return value; 3631 JVM_END 3632 3633 3634 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3635 JVMWrapper("JVM_SetArrayElement"); 3636 arrayOop a = check_array(env, arr, false, CHECK); 3637 oop box = JNIHandles::resolve(val); 3638 jvalue value; 3639 value.i = 0; // to initialize value before getting used in CHECK 3640 BasicType value_type; 3641 if (a->is_objArray()) { 3642 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3643 value_type = Reflection::unbox_for_regular_object(box, &value); 3644 } else { 3645 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3646 } 3647 Reflection::array_set(&value, a, index, value_type, CHECK); 3648 JVM_END 3649 3650 3651 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3652 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3653 arrayOop a = check_array(env, arr, true, CHECK); 3654 assert(a->is_typeArray(), "just checking"); 3655 BasicType value_type = (BasicType) vCode; 3656 Reflection::array_set(&v, a, index, value_type, CHECK); 3657 JVM_END 3658 3659 3660 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3661 JVMWrapper("JVM_NewArray"); 3662 JvmtiVMObjectAllocEventCollector oam; 3663 oop element_mirror = JNIHandles::resolve(eltClass); 3664 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3665 return JNIHandles::make_local(env, result); 3666 JVM_END 3667 3668 3669 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3670 JVMWrapper("JVM_NewMultiArray"); 3671 JvmtiVMObjectAllocEventCollector oam; 3672 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3673 oop element_mirror = JNIHandles::resolve(eltClass); 3674 assert(dim_array->is_typeArray(), "just checking"); 3675 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3676 return JNIHandles::make_local(env, result); 3677 JVM_END 3678 3679 3680 // Networking library support //////////////////////////////////////////////////////////////////// 3681 3682 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3683 JVMWrapper("JVM_InitializeSocketLibrary"); 3684 return 0; 3685 JVM_END 3686 3687 3688 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3689 JVMWrapper("JVM_Socket"); 3690 return os::socket(domain, type, protocol); 3691 JVM_END 3692 3693 3694 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3695 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3696 //%note jvm_r6 3697 return os::socket_close(fd); 3698 JVM_END 3699 3700 3701 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3702 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3703 //%note jvm_r6 3704 return os::socket_shutdown(fd, howto); 3705 JVM_END 3706 3707 3708 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3709 JVMWrapper2("JVM_Recv (0x%x)", fd); 3710 //%note jvm_r6 3711 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3712 JVM_END 3713 3714 3715 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3716 JVMWrapper2("JVM_Send (0x%x)", fd); 3717 //%note jvm_r6 3718 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3719 JVM_END 3720 3721 3722 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3723 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3724 //%note jvm_r6 3725 return os::timeout(fd, timeout); 3726 JVM_END 3727 3728 3729 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3730 JVMWrapper2("JVM_Listen (0x%x)", fd); 3731 //%note jvm_r6 3732 return os::listen(fd, count); 3733 JVM_END 3734 3735 3736 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3737 JVMWrapper2("JVM_Connect (0x%x)", fd); 3738 //%note jvm_r6 3739 return os::connect(fd, him, (socklen_t)len); 3740 JVM_END 3741 3742 3743 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3744 JVMWrapper2("JVM_Bind (0x%x)", fd); 3745 //%note jvm_r6 3746 return os::bind(fd, him, (socklen_t)len); 3747 JVM_END 3748 3749 3750 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3751 JVMWrapper2("JVM_Accept (0x%x)", fd); 3752 //%note jvm_r6 3753 socklen_t socklen = (socklen_t)(*len); 3754 jint result = os::accept(fd, him, &socklen); 3755 *len = (jint)socklen; 3756 return result; 3757 JVM_END 3758 3759 3760 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3761 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3762 //%note jvm_r6 3763 socklen_t socklen = (socklen_t)(*fromlen); 3764 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3765 *fromlen = (int)socklen; 3766 return result; 3767 JVM_END 3768 3769 3770 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3771 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3772 //%note jvm_r6 3773 socklen_t socklen = (socklen_t)(*len); 3774 jint result = os::get_sock_name(fd, him, &socklen); 3775 *len = (int)socklen; 3776 return result; 3777 JVM_END 3778 3779 3780 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3781 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3782 //%note jvm_r6 3783 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3784 JVM_END 3785 3786 3787 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3788 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3789 //%note jvm_r6 3790 return os::socket_available(fd, pbytes); 3791 JVM_END 3792 3793 3794 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3795 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3796 //%note jvm_r6 3797 socklen_t socklen = (socklen_t)(*optlen); 3798 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3799 *optlen = (int)socklen; 3800 return result; 3801 JVM_END 3802 3803 3804 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3805 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3806 //%note jvm_r6 3807 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3808 JVM_END 3809 3810 3811 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3812 JVMWrapper("JVM_GetHostName"); 3813 return os::get_host_name(name, namelen); 3814 JVM_END 3815 3816 3817 // Library support /////////////////////////////////////////////////////////////////////////// 3818 3819 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3820 //%note jvm_ct 3821 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3822 char ebuf[1024]; 3823 void *load_result; 3824 { 3825 ThreadToNativeFromVM ttnfvm(thread); 3826 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3827 } 3828 if (load_result == NULL) { 3829 char msg[1024]; 3830 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3831 // Since 'ebuf' may contain a string encoded using 3832 // platform encoding scheme, we need to pass 3833 // Exceptions::unsafe_to_utf8 to the new_exception method 3834 // as the last argument. See bug 6367357. 3835 Handle h_exception = 3836 Exceptions::new_exception(thread, 3837 vmSymbols::java_lang_UnsatisfiedLinkError(), 3838 msg, Exceptions::unsafe_to_utf8); 3839 3840 THROW_HANDLE_0(h_exception); 3841 } 3842 return load_result; 3843 JVM_END 3844 3845 3846 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3847 JVMWrapper("JVM_UnloadLibrary"); 3848 os::dll_unload(handle); 3849 JVM_END 3850 3851 3852 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3853 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3854 return os::dll_lookup(handle, name); 3855 JVM_END 3856 3857 3858 // Floating point support //////////////////////////////////////////////////////////////////// 3859 3860 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3861 JVMWrapper("JVM_IsNaN"); 3862 return g_isnan(a); 3863 JVM_END 3864 3865 3866 // JNI version /////////////////////////////////////////////////////////////////////////////// 3867 3868 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3869 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3870 return Threads::is_supported_jni_version_including_1_1(version); 3871 JVM_END 3872 3873 3874 // String support /////////////////////////////////////////////////////////////////////////// 3875 3876 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3877 JVMWrapper("JVM_InternString"); 3878 JvmtiVMObjectAllocEventCollector oam; 3879 if (str == NULL) return NULL; 3880 oop string = JNIHandles::resolve_non_null(str); 3881 oop result = StringTable::intern(string, CHECK_NULL); 3882 return (jstring) JNIHandles::make_local(env, result); 3883 JVM_END 3884 3885 3886 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3887 3888 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3889 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3890 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3891 // that only works with java threads. 3892 3893 3894 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3895 VM_Exit::block_if_vm_exited(); 3896 JVMWrapper("JVM_RawMonitorCreate"); 3897 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3898 } 3899 3900 3901 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3902 VM_Exit::block_if_vm_exited(); 3903 JVMWrapper("JVM_RawMonitorDestroy"); 3904 delete ((Mutex*) mon); 3905 } 3906 3907 3908 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3909 VM_Exit::block_if_vm_exited(); 3910 JVMWrapper("JVM_RawMonitorEnter"); 3911 ((Mutex*) mon)->jvm_raw_lock(); 3912 return 0; 3913 } 3914 3915 3916 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3917 VM_Exit::block_if_vm_exited(); 3918 JVMWrapper("JVM_RawMonitorExit"); 3919 ((Mutex*) mon)->jvm_raw_unlock(); 3920 } 3921 3922 3923 // Support for Serialization 3924 3925 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3926 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3927 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3928 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3929 3930 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3931 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3932 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3933 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3934 3935 3936 void initialize_converter_functions() { 3937 if (JDK_Version::is_gte_jdk14x_version()) { 3938 // These functions only exist for compatibility with 1.3.1 and earlier 3939 return; 3940 } 3941 3942 // called from universe_post_init() 3943 assert( 3944 int_bits_to_float_fn == NULL && 3945 long_bits_to_double_fn == NULL && 3946 float_to_int_bits_fn == NULL && 3947 double_to_long_bits_fn == NULL , 3948 "initialization done twice" 3949 ); 3950 // initialize 3951 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3952 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3953 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3954 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3955 // verify 3956 assert( 3957 int_bits_to_float_fn != NULL && 3958 long_bits_to_double_fn != NULL && 3959 float_to_int_bits_fn != NULL && 3960 double_to_long_bits_fn != NULL , 3961 "initialization failed" 3962 ); 3963 } 3964 3965 3966 3967 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3968 3969 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3970 // Security Note: 3971 // The Java level wrapper will perform the necessary security check allowing 3972 // us to pass the NULL as the initiating class loader. 3973 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3974 3975 KlassHandle klass_handle(THREAD, klass); 3976 // Check if we should initialize the class 3977 if (init && klass_handle->oop_is_instance()) { 3978 klass_handle->initialize(CHECK_NULL); 3979 } 3980 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3981 } 3982 3983 3984 // Internal SQE debugging support /////////////////////////////////////////////////////////// 3985 3986 #ifndef PRODUCT 3987 3988 extern "C" { 3989 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 3990 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 3991 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 3992 } 3993 3994 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 3995 JVMWrapper("JVM_AccessBoolVMFlag"); 3996 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 3997 JVM_END 3998 3999 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4000 JVMWrapper("JVM_AccessVMIntFlag"); 4001 intx v; 4002 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4003 *value = (jint)v; 4004 return result; 4005 JVM_END 4006 4007 4008 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4009 JVMWrapper("JVM_VMBreakPoint"); 4010 oop the_obj = JNIHandles::resolve(obj); 4011 BREAKPOINT; 4012 JVM_END 4013 4014 4015 #endif 4016 4017 4018 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4019 4020 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4021 JVMWrapper("JVM_InvokeMethod"); 4022 Handle method_handle; 4023 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4024 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4025 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4026 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4027 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4028 jobject res = JNIHandles::make_local(env, result); 4029 if (JvmtiExport::should_post_vm_object_alloc()) { 4030 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4031 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4032 if (java_lang_Class::is_primitive(ret_type)) { 4033 // Only for primitive type vm allocates memory for java object. 4034 // See box() method. 4035 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4036 } 4037 } 4038 return res; 4039 } else { 4040 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4041 } 4042 JVM_END 4043 4044 4045 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4046 JVMWrapper("JVM_NewInstanceFromConstructor"); 4047 oop constructor_mirror = JNIHandles::resolve(c); 4048 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4049 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4050 jobject res = JNIHandles::make_local(env, result); 4051 if (JvmtiExport::should_post_vm_object_alloc()) { 4052 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4053 } 4054 return res; 4055 JVM_END 4056 4057 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4058 4059 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4060 JVMWrapper("JVM_SupportsCX8"); 4061 return VM_Version::supports_cx8(); 4062 JVM_END 4063 4064 4065 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4066 JVMWrapper("JVM_CX8Field"); 4067 jlong res; 4068 oop o = JNIHandles::resolve(obj); 4069 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4070 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4071 4072 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4073 res = Atomic::cmpxchg(newVal, addr, oldVal); 4074 4075 return res == oldVal; 4076 JVM_END 4077 4078 // DTrace /////////////////////////////////////////////////////////////////// 4079 4080 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4081 JVMWrapper("JVM_DTraceGetVersion"); 4082 return (jint)JVM_TRACING_DTRACE_VERSION; 4083 JVM_END 4084 4085 JVM_ENTRY(jlong,JVM_DTraceActivate( 4086 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4087 JVM_DTraceProvider* providers)) 4088 JVMWrapper("JVM_DTraceActivate"); 4089 return DTraceJSDT::activate( 4090 version, module_name, providers_count, providers, CHECK_0); 4091 JVM_END 4092 4093 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4094 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4095 return DTraceJSDT::is_probe_enabled(method); 4096 JVM_END 4097 4098 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4099 JVMWrapper("JVM_DTraceDispose"); 4100 DTraceJSDT::dispose(handle); 4101 JVM_END 4102 4103 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4104 JVMWrapper("JVM_DTraceIsSupported"); 4105 return DTraceJSDT::is_supported(); 4106 JVM_END 4107 4108 // Returns an array of all live Thread objects (VM internal JavaThreads, 4109 // jvmti agent threads, and JNI attaching threads are skipped) 4110 // See CR 6404306 regarding JNI attaching threads 4111 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4112 ResourceMark rm(THREAD); 4113 ThreadsListEnumerator tle(THREAD, false, false); 4114 JvmtiVMObjectAllocEventCollector oam; 4115 4116 int num_threads = tle.num_threads(); 4117 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4118 objArrayHandle threads_ah(THREAD, r); 4119 4120 for (int i = 0; i < num_threads; i++) { 4121 Handle h = tle.get_threadObj(i); 4122 threads_ah->obj_at_put(i, h()); 4123 } 4124 4125 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4126 JVM_END 4127 4128 4129 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4130 // Return StackTraceElement[][], each element is the stack trace of a thread in 4131 // the corresponding entry in the given threads array 4132 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4133 JVMWrapper("JVM_DumpThreads"); 4134 JvmtiVMObjectAllocEventCollector oam; 4135 4136 // Check if threads is null 4137 if (threads == NULL) { 4138 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4139 } 4140 4141 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4142 objArrayHandle ah(THREAD, a); 4143 int num_threads = ah->length(); 4144 // check if threads is non-empty array 4145 if (num_threads == 0) { 4146 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4147 } 4148 4149 // check if threads is not an array of objects of Thread class 4150 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4151 if (k != SystemDictionary::Thread_klass()) { 4152 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4153 } 4154 4155 ResourceMark rm(THREAD); 4156 4157 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4158 for (int i = 0; i < num_threads; i++) { 4159 oop thread_obj = ah->obj_at(i); 4160 instanceHandle h(THREAD, (instanceOop) thread_obj); 4161 thread_handle_array->append(h); 4162 } 4163 4164 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4165 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4166 4167 JVM_END 4168 4169 // JVM monitoring and management support 4170 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4171 return Management::get_jmm_interface(version); 4172 JVM_END 4173 4174 // com.sun.tools.attach.VirtualMachine agent properties support 4175 // 4176 // Initialize the agent properties with the properties maintained in the VM 4177 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4178 JVMWrapper("JVM_InitAgentProperties"); 4179 ResourceMark rm; 4180 4181 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4182 4183 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4184 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4185 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4186 return properties; 4187 JVM_END 4188 4189 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4190 { 4191 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4192 JvmtiVMObjectAllocEventCollector oam; 4193 4194 if (ofClass == NULL) { 4195 return NULL; 4196 } 4197 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4198 // Special handling for primitive objects 4199 if (java_lang_Class::is_primitive(mirror())) { 4200 return NULL; 4201 } 4202 Klass* k = java_lang_Class::as_Klass(mirror()); 4203 if (!k->oop_is_instance()) { 4204 return NULL; 4205 } 4206 instanceKlassHandle ik_h(THREAD, k); 4207 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4208 if (encl_method_class_idx == 0) { 4209 return NULL; 4210 } 4211 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4212 objArrayHandle dest(THREAD, dest_o); 4213 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4214 dest->obj_at_put(0, enc_k->java_mirror()); 4215 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4216 if (encl_method_method_idx != 0) { 4217 Symbol* sym = ik_h->constants()->symbol_at( 4218 extract_low_short_from_int( 4219 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4220 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4221 dest->obj_at_put(1, str()); 4222 sym = ik_h->constants()->symbol_at( 4223 extract_high_short_from_int( 4224 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4225 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4226 dest->obj_at_put(2, str()); 4227 } 4228 return (jobjectArray) JNIHandles::make_local(dest()); 4229 } 4230 JVM_END 4231 4232 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4233 jint javaThreadState)) 4234 { 4235 // If new thread states are added in future JDK and VM versions, 4236 // this should check if the JDK version is compatible with thread 4237 // states supported by the VM. Return NULL if not compatible. 4238 // 4239 // This function must map the VM java_lang_Thread::ThreadStatus 4240 // to the Java thread state that the JDK supports. 4241 // 4242 4243 typeArrayHandle values_h; 4244 switch (javaThreadState) { 4245 case JAVA_THREAD_STATE_NEW : { 4246 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4247 values_h = typeArrayHandle(THREAD, r); 4248 values_h->int_at_put(0, java_lang_Thread::NEW); 4249 break; 4250 } 4251 case JAVA_THREAD_STATE_RUNNABLE : { 4252 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4253 values_h = typeArrayHandle(THREAD, r); 4254 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4255 break; 4256 } 4257 case JAVA_THREAD_STATE_BLOCKED : { 4258 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4259 values_h = typeArrayHandle(THREAD, r); 4260 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4261 break; 4262 } 4263 case JAVA_THREAD_STATE_WAITING : { 4264 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4265 values_h = typeArrayHandle(THREAD, r); 4266 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4267 values_h->int_at_put(1, java_lang_Thread::PARKED); 4268 break; 4269 } 4270 case JAVA_THREAD_STATE_TIMED_WAITING : { 4271 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4272 values_h = typeArrayHandle(THREAD, r); 4273 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4274 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4275 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4276 break; 4277 } 4278 case JAVA_THREAD_STATE_TERMINATED : { 4279 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4280 values_h = typeArrayHandle(THREAD, r); 4281 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4282 break; 4283 } 4284 default: 4285 // Unknown state - probably incompatible JDK version 4286 return NULL; 4287 } 4288 4289 return (jintArray) JNIHandles::make_local(env, values_h()); 4290 } 4291 JVM_END 4292 4293 4294 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4295 jint javaThreadState, 4296 jintArray values)) 4297 { 4298 // If new thread states are added in future JDK and VM versions, 4299 // this should check if the JDK version is compatible with thread 4300 // states supported by the VM. Return NULL if not compatible. 4301 // 4302 // This function must map the VM java_lang_Thread::ThreadStatus 4303 // to the Java thread state that the JDK supports. 4304 // 4305 4306 ResourceMark rm; 4307 4308 // Check if threads is null 4309 if (values == NULL) { 4310 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4311 } 4312 4313 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4314 typeArrayHandle values_h(THREAD, v); 4315 4316 objArrayHandle names_h; 4317 switch (javaThreadState) { 4318 case JAVA_THREAD_STATE_NEW : { 4319 assert(values_h->length() == 1 && 4320 values_h->int_at(0) == java_lang_Thread::NEW, 4321 "Invalid threadStatus value"); 4322 4323 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4324 1, /* only 1 substate */ 4325 CHECK_NULL); 4326 names_h = objArrayHandle(THREAD, r); 4327 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4328 names_h->obj_at_put(0, name()); 4329 break; 4330 } 4331 case JAVA_THREAD_STATE_RUNNABLE : { 4332 assert(values_h->length() == 1 && 4333 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4334 "Invalid threadStatus value"); 4335 4336 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4337 1, /* only 1 substate */ 4338 CHECK_NULL); 4339 names_h = objArrayHandle(THREAD, r); 4340 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4341 names_h->obj_at_put(0, name()); 4342 break; 4343 } 4344 case JAVA_THREAD_STATE_BLOCKED : { 4345 assert(values_h->length() == 1 && 4346 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4347 "Invalid threadStatus value"); 4348 4349 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4350 1, /* only 1 substate */ 4351 CHECK_NULL); 4352 names_h = objArrayHandle(THREAD, r); 4353 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4354 names_h->obj_at_put(0, name()); 4355 break; 4356 } 4357 case JAVA_THREAD_STATE_WAITING : { 4358 assert(values_h->length() == 2 && 4359 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4360 values_h->int_at(1) == java_lang_Thread::PARKED, 4361 "Invalid threadStatus value"); 4362 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4363 2, /* number of substates */ 4364 CHECK_NULL); 4365 names_h = objArrayHandle(THREAD, r); 4366 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4367 CHECK_NULL); 4368 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4369 CHECK_NULL); 4370 names_h->obj_at_put(0, name0()); 4371 names_h->obj_at_put(1, name1()); 4372 break; 4373 } 4374 case JAVA_THREAD_STATE_TIMED_WAITING : { 4375 assert(values_h->length() == 3 && 4376 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4377 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4378 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4379 "Invalid threadStatus value"); 4380 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4381 3, /* number of substates */ 4382 CHECK_NULL); 4383 names_h = objArrayHandle(THREAD, r); 4384 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4385 CHECK_NULL); 4386 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4387 CHECK_NULL); 4388 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4389 CHECK_NULL); 4390 names_h->obj_at_put(0, name0()); 4391 names_h->obj_at_put(1, name1()); 4392 names_h->obj_at_put(2, name2()); 4393 break; 4394 } 4395 case JAVA_THREAD_STATE_TERMINATED : { 4396 assert(values_h->length() == 1 && 4397 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4398 "Invalid threadStatus value"); 4399 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4400 1, /* only 1 substate */ 4401 CHECK_NULL); 4402 names_h = objArrayHandle(THREAD, r); 4403 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4404 names_h->obj_at_put(0, name()); 4405 break; 4406 } 4407 default: 4408 // Unknown state - probably incompatible JDK version 4409 return NULL; 4410 } 4411 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4412 } 4413 JVM_END 4414 4415 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4416 { 4417 memset(info, 0, sizeof(info_size)); 4418 4419 info->jvm_version = Abstract_VM_Version::jvm_version(); 4420 info->update_version = 0; /* 0 in HotSpot Express VM */ 4421 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4422 4423 // when we add a new capability in the jvm_version_info struct, we should also 4424 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4425 // counter defined in runtimeService.cpp. 4426 info->is_attachable = AttachListener::is_attach_supported(); 4427 } 4428 JVM_END