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 "utilities/copy.hpp" 63 #include "utilities/defaultStream.hpp" 64 #include "utilities/dtrace.hpp" 65 #include "utilities/events.hpp" 66 #include "utilities/histogram.hpp" 67 #include "utilities/top.hpp" 68 #include "utilities/utf8.hpp" 69 #ifdef TARGET_OS_FAMILY_linux 70 # include "jvm_linux.h" 71 #endif 72 #ifdef TARGET_OS_FAMILY_solaris 73 # include "jvm_solaris.h" 74 #endif 75 #ifdef TARGET_OS_FAMILY_windows 76 # include "jvm_windows.h" 77 #endif 78 #ifdef TARGET_OS_FAMILY_bsd 79 # include "jvm_bsd.h" 80 #endif 81 82 #include <errno.h> 83 84 #ifndef USDT2 85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 88 #endif /* !USDT2 */ 89 90 /* 91 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 92 such ctors and calls MUST NOT come between an oop declaration/init and its 93 usage because if objects are move this may cause various memory stomps, bus 94 errors and segfaults. Here is a cookbook for causing so called "naked oop 95 failures": 96 97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 98 JVMWrapper("JVM_GetClassDeclaredFields"); 99 100 // Object address to be held directly in mirror & not visible to GC 101 oop mirror = JNIHandles::resolve_non_null(ofClass); 102 103 // If this ctor can hit a safepoint, moving objects around, then 104 ComplexConstructor foo; 105 106 // Boom! mirror may point to JUNK instead of the intended object 107 (some dereference of mirror) 108 109 // Here's another call that may block for GC, making mirror stale 110 MutexLocker ml(some_lock); 111 112 // And here's an initializer that can result in a stale oop 113 // all in one step. 114 oop o = call_that_can_throw_exception(TRAPS); 115 116 117 The solution is to keep the oop declaration BELOW the ctor or function 118 call that might cause a GC, do another resolve to reassign the oop, or 119 consider use of a Handle instead of an oop so there is immunity from object 120 motion. But note that the "QUICK" entries below do not have a handlemark 121 and thus can only support use of handles passed in. 122 */ 123 124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 125 ResourceMark rm; 126 int line_number = -1; 127 const char * source_file = NULL; 128 const char * trace = "explicit"; 129 InstanceKlass* caller = NULL; 130 JavaThread* jthread = JavaThread::current(); 131 if (jthread->has_last_Java_frame()) { 132 vframeStream vfst(jthread); 133 134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 136 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 138 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 139 140 Method* last_caller = NULL; 141 142 while (!vfst.at_end()) { 143 Method* m = vfst.method(); 144 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 145 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 146 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 147 break; 148 } 149 last_caller = m; 150 vfst.next(); 151 } 152 // if this is called from Class.forName0 and that is called from Class.forName, 153 // then print the caller of Class.forName. If this is Class.loadClass, then print 154 // that caller, otherwise keep quiet since this should be picked up elsewhere. 155 bool found_it = false; 156 if (!vfst.at_end() && 157 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 158 vfst.method()->name() == vmSymbols::forName0_name()) { 159 vfst.next(); 160 if (!vfst.at_end() && 161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 162 vfst.method()->name() == vmSymbols::forName_name()) { 163 vfst.next(); 164 found_it = true; 165 } 166 } else if (last_caller != NULL && 167 last_caller->method_holder()->name() == 168 vmSymbols::java_lang_ClassLoader() && 169 (last_caller->name() == vmSymbols::loadClassInternal_name() || 170 last_caller->name() == vmSymbols::loadClass_name())) { 171 found_it = true; 172 } else if (!vfst.at_end()) { 173 if (vfst.method()->is_native()) { 174 // JNI call 175 found_it = true; 176 } 177 } 178 if (found_it && !vfst.at_end()) { 179 // found the caller 180 caller = vfst.method()->method_holder(); 181 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 182 if (line_number == -1) { 183 // show method name if it's a native method 184 trace = vfst.method()->name_and_sig_as_C_string(); 185 } 186 Symbol* s = caller->source_file_name(); 187 if (s != NULL) { 188 source_file = s->as_C_string(); 189 } 190 } 191 } 192 if (caller != NULL) { 193 if (to_class != caller) { 194 const char * from = caller->external_name(); 195 const char * to = to_class->external_name(); 196 // print in a single call to reduce interleaving between threads 197 if (source_file != NULL) { 198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 199 } else { 200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 201 } 202 } 203 } 204 } 205 206 void trace_class_resolution(Klass* to_class) { 207 EXCEPTION_MARK; 208 trace_class_resolution_impl(to_class, THREAD); 209 if (HAS_PENDING_EXCEPTION) { 210 CLEAR_PENDING_EXCEPTION; 211 } 212 } 213 214 // Wrapper to trace JVM functions 215 216 #ifdef ASSERT 217 class JVMTraceWrapper : public StackObj { 218 public: 219 JVMTraceWrapper(const char* format, ...) { 220 if (TraceJVMCalls) { 221 va_list ap; 222 va_start(ap, format); 223 tty->print("JVM "); 224 tty->vprint_cr(format, ap); 225 va_end(ap); 226 } 227 } 228 }; 229 230 Histogram* JVMHistogram; 231 volatile jint JVMHistogram_lock = 0; 232 233 class JVMHistogramElement : public HistogramElement { 234 public: 235 JVMHistogramElement(const char* name); 236 }; 237 238 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 239 _name = elementName; 240 uintx count = 0; 241 242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 244 count +=1; 245 if ( (WarnOnStalledSpinLock > 0) 246 && (count % WarnOnStalledSpinLock == 0)) { 247 warning("JVMHistogram_lock seems to be stalled"); 248 } 249 } 250 } 251 252 if(JVMHistogram == NULL) 253 JVMHistogram = new Histogram("JVM Call Counts",100); 254 255 JVMHistogram->add_element(this); 256 Atomic::dec(&JVMHistogram_lock); 257 } 258 259 #define JVMCountWrapper(arg) \ 260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 262 263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 267 #else 268 #define JVMWrapper(arg1) 269 #define JVMWrapper2(arg1, arg2) 270 #define JVMWrapper3(arg1, arg2, arg3) 271 #define JVMWrapper4(arg1, arg2, arg3, arg4) 272 #endif 273 274 275 // Interface version ///////////////////////////////////////////////////////////////////// 276 277 278 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 279 return JVM_INTERFACE_VERSION; 280 JVM_END 281 282 283 // java.lang.System ////////////////////////////////////////////////////////////////////// 284 285 286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 287 JVMWrapper("JVM_CurrentTimeMillis"); 288 return os::javaTimeMillis(); 289 JVM_END 290 291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 292 JVMWrapper("JVM_NanoTime"); 293 return os::javaTimeNanos(); 294 JVM_END 295 296 297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 298 jobject dst, jint dst_pos, jint length)) 299 JVMWrapper("JVM_ArrayCopy"); 300 // Check if we have null pointers 301 if (src == NULL || dst == NULL) { 302 THROW(vmSymbols::java_lang_NullPointerException()); 303 } 304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 308 // Do copy 309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 310 JVM_END 311 312 313 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 314 JavaValue r(T_OBJECT); 315 // public synchronized Object put(Object key, Object value); 316 HandleMark hm(THREAD); 317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 319 JavaCalls::call_virtual(&r, 320 props, 321 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 322 vmSymbols::put_name(), 323 vmSymbols::object_object_object_signature(), 324 key_str, 325 value_str, 326 THREAD); 327 } 328 329 330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 331 332 333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 334 JVMWrapper("JVM_InitProperties"); 335 ResourceMark rm; 336 337 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 338 339 // System property list includes both user set via -D option and 340 // jvm system specific properties. 341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 342 PUTPROP(props, p->key(), p->value()); 343 } 344 345 // Convert the -XX:MaxDirectMemorySize= command line flag 346 // to the sun.nio.MaxDirectMemorySize property. 347 // Do this after setting user properties to prevent people 348 // from setting the value with a -D option, as requested. 349 { 350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 352 } else { 353 char as_chars[256]; 354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 356 } 357 } 358 359 // JVM monitoring and management support 360 // Add the sun.management.compiler property for the compiler's name 361 { 362 #undef CSIZE 363 #if defined(_LP64) || defined(_WIN64) 364 #define CSIZE "64-Bit " 365 #else 366 #define CSIZE 367 #endif // 64bit 368 369 #ifdef TIERED 370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 371 #else 372 #if defined(COMPILER1) 373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 374 #elif defined(COMPILER2) 375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 376 #else 377 const char* compiler_name = ""; 378 #endif // compilers 379 #endif // TIERED 380 381 if (*compiler_name != '\0' && 382 (Arguments::mode() != Arguments::_int)) { 383 PUTPROP(props, "sun.management.compiler", compiler_name); 384 } 385 } 386 387 return properties; 388 JVM_END 389 390 391 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 392 393 extern volatile jint vm_created; 394 395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 396 if (vm_created != 0 && (code == 0)) { 397 // The VM is about to exit. We call back into Java to check whether finalizers should be run 398 Universe::run_finalizers_on_exit(); 399 } 400 before_exit(thread); 401 vm_exit(code); 402 JVM_END 403 404 405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 406 before_exit(thread); 407 vm_exit(code); 408 JVM_END 409 410 411 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 412 register_on_exit_function(func); 413 JVM_END 414 415 416 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 417 JVMWrapper("JVM_GC"); 418 if (!DisableExplicitGC) { 419 Universe::heap()->collect(GCCause::_java_lang_system_gc); 420 } 421 JVM_END 422 423 424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 425 JVMWrapper("JVM_MaxObjectInspectionAge"); 426 return Universe::heap()->millis_since_last_gc(); 427 JVM_END 428 429 430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 431 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 432 JVM_END 433 434 435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 436 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 437 JVM_END 438 439 static inline jlong convert_size_t_to_jlong(size_t val) { 440 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 441 NOT_LP64 (return (jlong)val;) 442 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 443 } 444 445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 446 JVMWrapper("JVM_TotalMemory"); 447 size_t n = Universe::heap()->capacity(); 448 return convert_size_t_to_jlong(n); 449 JVM_END 450 451 452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 453 JVMWrapper("JVM_FreeMemory"); 454 CollectedHeap* ch = Universe::heap(); 455 size_t n; 456 { 457 MutexLocker x(Heap_lock); 458 n = ch->capacity() - ch->used(); 459 } 460 return convert_size_t_to_jlong(n); 461 JVM_END 462 463 464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 465 JVMWrapper("JVM_MaxMemory"); 466 size_t n = Universe::heap()->max_capacity(); 467 return convert_size_t_to_jlong(n); 468 JVM_END 469 470 471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 472 JVMWrapper("JVM_ActiveProcessorCount"); 473 return os::active_processor_count(); 474 JVM_END 475 476 477 478 // java.lang.Throwable ////////////////////////////////////////////////////// 479 480 481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 482 JVMWrapper("JVM_FillInStackTrace"); 483 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 484 java_lang_Throwable::fill_in_stack_trace(exception); 485 JVM_END 486 487 488 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 489 JVMWrapper("JVM_GetStackTraceDepth"); 490 oop exception = JNIHandles::resolve(throwable); 491 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 492 JVM_END 493 494 495 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 496 JVMWrapper("JVM_GetStackTraceElement"); 497 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 498 oop exception = JNIHandles::resolve(throwable); 499 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 500 return JNIHandles::make_local(env, element); 501 JVM_END 502 503 504 // java.lang.Object /////////////////////////////////////////////// 505 506 507 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 508 JVMWrapper("JVM_IHashCode"); 509 // as implemented in the classic virtual machine; return 0 if object is NULL 510 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 511 JVM_END 512 513 514 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 515 JVMWrapper("JVM_MonitorWait"); 516 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 517 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 518 if (JvmtiExport::should_post_monitor_wait()) { 519 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 520 } 521 ObjectSynchronizer::wait(obj, ms, CHECK); 522 JVM_END 523 524 525 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 526 JVMWrapper("JVM_MonitorNotify"); 527 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 528 ObjectSynchronizer::notify(obj, CHECK); 529 JVM_END 530 531 532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 533 JVMWrapper("JVM_MonitorNotifyAll"); 534 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 535 ObjectSynchronizer::notifyall(obj, CHECK); 536 JVM_END 537 538 539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 540 JVMWrapper("JVM_Clone"); 541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 542 const KlassHandle klass (THREAD, obj->klass()); 543 JvmtiVMObjectAllocEventCollector oam; 544 545 #ifdef ASSERT 546 // Just checking that the cloneable flag is set correct 547 if (obj->is_array()) { 548 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 549 } else { 550 guarantee(obj->is_instance(), "should be instanceOop"); 551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 553 } 554 #endif 555 556 // Check if class of obj supports the Cloneable interface. 557 // All arrays are considered to be cloneable (See JLS 20.1.5) 558 if (!klass->is_cloneable()) { 559 ResourceMark rm(THREAD); 560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 561 } 562 563 // Make shallow object copy 564 const int size = obj->size(); 565 oop new_obj = NULL; 566 if (obj->is_array()) { 567 const int length = ((arrayOop)obj())->length(); 568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 569 } else { 570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 571 } 572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 573 // is modifying a reference field in the clonee, a non-oop-atomic copy might 574 // be suspended in the middle of copying the pointer and end up with parts 575 // of two different pointers in the field. Subsequent dereferences will crash. 576 // 4846409: an oop-copy of objects with long or double fields or arrays of same 577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 578 // of oops. We know objects are aligned on a minimum of an jlong boundary. 579 // The same is true of StubRoutines::object_copy and the various oop_copy 580 // variants, and of the code generated by the inline_native_clone intrinsic. 581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 583 (size_t)align_object_size(size) / HeapWordsPerLong); 584 // Clear the header 585 new_obj->init_mark(); 586 587 // Store check (mark entire object and let gc sort it out) 588 BarrierSet* bs = Universe::heap()->barrier_set(); 589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 590 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 591 592 // Caution: this involves a java upcall, so the clone should be 593 // "gc-robust" by this stage. 594 if (klass->has_finalizer()) { 595 assert(obj->is_instance(), "should be instanceOop"); 596 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 597 } 598 599 return JNIHandles::make_local(env, oop(new_obj)); 600 JVM_END 601 602 // java.lang.Compiler //////////////////////////////////////////////////// 603 604 // The initial cuts of the HotSpot VM will not support JITs, and all existing 605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 606 // functions are all silently ignored unless JVM warnings are printed. 607 608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 610 JVM_END 611 612 613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 615 return JNI_FALSE; 616 JVM_END 617 618 619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 621 return JNI_FALSE; 622 JVM_END 623 624 625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 627 return JNI_FALSE; 628 JVM_END 629 630 631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 633 return NULL; 634 JVM_END 635 636 637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 639 JVM_END 640 641 642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 644 JVM_END 645 646 647 648 // Error message support ////////////////////////////////////////////////////// 649 650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 651 JVMWrapper("JVM_GetLastErrorString"); 652 return (jint)os::lasterror(buf, len); 653 JVM_END 654 655 656 // java.io.File /////////////////////////////////////////////////////////////// 657 658 JVM_LEAF(char*, JVM_NativePath(char* path)) 659 JVMWrapper2("JVM_NativePath (%s)", path); 660 return os::native_path(path); 661 JVM_END 662 663 664 // Misc. class handling /////////////////////////////////////////////////////////// 665 666 667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 668 JVMWrapper("JVM_GetCallerClass"); 669 670 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation. 671 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) { 672 Klass* k = thread->security_get_caller_class(depth); 673 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 674 } else { 675 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass 676 assert(depth == -1, "wrong handshake depth"); 677 } 678 679 // Getting the class of the caller frame. 680 // 681 // The call stack at this point looks something like this: 682 // 683 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 684 // [1] [ @CallerSensitive API.method ] 685 // [.] [ (skipped intermediate frames) ] 686 // [n] [ caller ] 687 vframeStream vfst(thread); 688 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 689 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 690 Method* m = vfst.method(); 691 assert(m != NULL, "sanity"); 692 switch (n) { 693 case 0: 694 // This must only be called from Reflection.getCallerClass 695 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 697 } 698 // fall-through 699 case 1: 700 // Frame 0 and 1 must be caller sensitive. 701 if (!m->caller_sensitive()) { 702 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 703 } 704 break; 705 default: 706 if (!m->is_ignored_by_security_stack_walk()) { 707 // We have reached the desired frame; return the holder class. 708 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 709 } 710 break; 711 } 712 } 713 return NULL; 714 JVM_END 715 716 717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 718 JVMWrapper("JVM_FindPrimitiveClass"); 719 oop mirror = NULL; 720 BasicType t = name2type(utf); 721 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 722 mirror = Universe::java_mirror(t); 723 } 724 if (mirror == NULL) { 725 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 726 } else { 727 return (jclass) JNIHandles::make_local(env, mirror); 728 } 729 JVM_END 730 731 732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 733 JVMWrapper("JVM_ResolveClass"); 734 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 735 JVM_END 736 737 738 // Returns a class loaded by the bootstrap class loader; or null 739 // if not found. ClassNotFoundException is not thrown. 740 // 741 // Rationale behind JVM_FindClassFromBootLoader 742 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 743 // b> because of (a) java.dll has a direct dependecy on the unexported 744 // private symbol "_JVM_FindClassFromClassLoader@20". 745 // c> the launcher cannot use the private symbol as it dynamically opens 746 // the entry point, so if something changes, the launcher will fail 747 // unexpectedly at runtime, it is safest for the launcher to dlopen a 748 // stable exported interface. 749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 750 // signature to change from _JVM_FindClassFromClassLoader@20 to 751 // JVM_FindClassFromClassLoader and will not be backward compatible 752 // with older JDKs. 753 // Thus a public/stable exported entry point is the right solution, 754 // public here means public in linker semantics, and is exported only 755 // to the JDK, and is not intended to be a public API. 756 757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 758 const char* name)) 759 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 760 761 // Java libraries should ensure that name is never null... 762 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 763 // It's impossible to create this class; the name cannot fit 764 // into the constant pool. 765 return NULL; 766 } 767 768 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 769 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 770 if (k == NULL) { 771 return NULL; 772 } 773 774 if (TraceClassResolution) { 775 trace_class_resolution(k); 776 } 777 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 778 JVM_END 779 780 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 781 jboolean init, jobject loader, 782 jboolean throwError)) 783 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 784 throwError ? "error" : "exception"); 785 // Java libraries should ensure that name is never null... 786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 787 // It's impossible to create this class; the name cannot fit 788 // into the constant pool. 789 if (throwError) { 790 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 791 } else { 792 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 793 } 794 } 795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 796 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 797 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 798 Handle(), throwError, THREAD); 799 800 if (TraceClassResolution && result != NULL) { 801 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 802 } 803 return result; 804 JVM_END 805 806 807 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 808 jboolean init, jclass from)) 809 JVMWrapper2("JVM_FindClassFromClass %s", name); 810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 811 // It's impossible to create this class; the name cannot fit 812 // into the constant pool. 813 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 814 } 815 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 816 oop from_class_oop = JNIHandles::resolve(from); 817 Klass* from_class = (from_class_oop == NULL) 818 ? (Klass*)NULL 819 : java_lang_Class::as_Klass(from_class_oop); 820 oop class_loader = NULL; 821 oop protection_domain = NULL; 822 if (from_class != NULL) { 823 class_loader = from_class->class_loader(); 824 protection_domain = from_class->protection_domain(); 825 } 826 Handle h_loader(THREAD, class_loader); 827 Handle h_prot (THREAD, protection_domain); 828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 829 h_prot, true, thread); 830 831 if (TraceClassResolution && result != NULL) { 832 // this function is generally only used for class loading during verification. 833 ResourceMark rm; 834 oop from_mirror = JNIHandles::resolve_non_null(from); 835 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 836 const char * from_name = from_class->external_name(); 837 838 oop mirror = JNIHandles::resolve_non_null(result); 839 Klass* to_class = java_lang_Class::as_Klass(mirror); 840 const char * to = to_class->external_name(); 841 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 842 } 843 844 return result; 845 JVM_END 846 847 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 848 if (loader.is_null()) { 849 return; 850 } 851 852 // check whether the current caller thread holds the lock or not. 853 // If not, increment the corresponding counter 854 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 855 ObjectSynchronizer::owner_self) { 856 counter->inc(); 857 } 858 } 859 860 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 861 // and JVM_DefineClassWithSourceCond() 862 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 863 jobject loader, const jbyte *buf, 864 jsize len, jobject pd, const char *source, 865 jboolean verify, TRAPS) { 866 if (source == NULL) source = "__JVM_DefineClass__"; 867 868 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 869 JavaThread* jt = (JavaThread*) THREAD; 870 871 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 872 ClassLoader::perf_define_appclass_selftime(), 873 ClassLoader::perf_define_appclasses(), 874 jt->get_thread_stat()->perf_recursion_counts_addr(), 875 jt->get_thread_stat()->perf_timers_addr(), 876 PerfClassTraceTime::DEFINE_CLASS); 877 878 if (UsePerfData) { 879 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 880 } 881 882 // Since exceptions can be thrown, class initialization can take place 883 // if name is NULL no check for class name in .class stream has to be made. 884 TempNewSymbol class_name = NULL; 885 if (name != NULL) { 886 const int str_len = (int)strlen(name); 887 if (str_len > Symbol::max_length()) { 888 // It's impossible to create this class; the name cannot fit 889 // into the constant pool. 890 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 891 } 892 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 893 } 894 895 ResourceMark rm(THREAD); 896 ClassFileStream st((u1*) buf, len, (char *)source); 897 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 898 if (UsePerfData) { 899 is_lock_held_by_thread(class_loader, 900 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 901 THREAD); 902 } 903 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 904 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 905 protection_domain, &st, 906 verify != 0, 907 CHECK_NULL); 908 909 if (TraceClassResolution && k != NULL) { 910 trace_class_resolution(k); 911 } 912 913 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 914 } 915 916 917 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 918 JVMWrapper2("JVM_DefineClass %s", name); 919 920 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 921 JVM_END 922 923 924 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 925 JVMWrapper2("JVM_DefineClassWithSource %s", name); 926 927 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 928 JVM_END 929 930 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 931 jobject loader, const jbyte *buf, 932 jsize len, jobject pd, 933 const char *source, jboolean verify)) 934 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 935 936 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 937 JVM_END 938 939 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 940 JVMWrapper("JVM_FindLoadedClass"); 941 ResourceMark rm(THREAD); 942 943 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 944 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 945 946 const char* str = java_lang_String::as_utf8_string(string()); 947 // Sanity check, don't expect null 948 if (str == NULL) return NULL; 949 950 const int str_len = (int)strlen(str); 951 if (str_len > Symbol::max_length()) { 952 // It's impossible to create this class; the name cannot fit 953 // into the constant pool. 954 return NULL; 955 } 956 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 957 958 // Security Note: 959 // The Java level wrapper will perform the necessary security check allowing 960 // us to pass the NULL as the initiating class loader. 961 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 962 if (UsePerfData) { 963 is_lock_held_by_thread(h_loader, 964 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 965 THREAD); 966 } 967 968 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 969 h_loader, 970 Handle(), 971 CHECK_NULL); 972 973 return (k == NULL) ? NULL : 974 (jclass) JNIHandles::make_local(env, k->java_mirror()); 975 JVM_END 976 977 978 // Reflection support ////////////////////////////////////////////////////////////////////////////// 979 980 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 981 assert (cls != NULL, "illegal class"); 982 JVMWrapper("JVM_GetClassName"); 983 JvmtiVMObjectAllocEventCollector oam; 984 ResourceMark rm(THREAD); 985 const char* name; 986 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 987 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 988 } else { 989 // Consider caching interned string in Klass 990 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 991 assert(k->is_klass(), "just checking"); 992 name = k->external_name(); 993 } 994 oop result = StringTable::intern((char*) name, CHECK_NULL); 995 return (jstring) JNIHandles::make_local(env, result); 996 JVM_END 997 998 999 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1000 JVMWrapper("JVM_GetClassInterfaces"); 1001 JvmtiVMObjectAllocEventCollector oam; 1002 oop mirror = JNIHandles::resolve_non_null(cls); 1003 1004 // Special handling for primitive objects 1005 if (java_lang_Class::is_primitive(mirror)) { 1006 // Primitive objects does not have any interfaces 1007 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1008 return (jobjectArray) JNIHandles::make_local(env, r); 1009 } 1010 1011 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1012 // Figure size of result array 1013 int size; 1014 if (klass->oop_is_instance()) { 1015 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1016 } else { 1017 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1018 size = 2; 1019 } 1020 1021 // Allocate result array 1022 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1023 objArrayHandle result (THREAD, r); 1024 // Fill in result 1025 if (klass->oop_is_instance()) { 1026 // Regular instance klass, fill in all local interfaces 1027 for (int index = 0; index < size; index++) { 1028 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1029 result->obj_at_put(index, k->java_mirror()); 1030 } 1031 } else { 1032 // All arrays implement java.lang.Cloneable and java.io.Serializable 1033 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1034 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1035 } 1036 return (jobjectArray) JNIHandles::make_local(env, result()); 1037 JVM_END 1038 1039 1040 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1041 JVMWrapper("JVM_GetClassLoader"); 1042 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1043 return NULL; 1044 } 1045 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1046 oop loader = k->class_loader(); 1047 return JNIHandles::make_local(env, loader); 1048 JVM_END 1049 1050 1051 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1052 JVMWrapper("JVM_IsInterface"); 1053 oop mirror = JNIHandles::resolve_non_null(cls); 1054 if (java_lang_Class::is_primitive(mirror)) { 1055 return JNI_FALSE; 1056 } 1057 Klass* k = java_lang_Class::as_Klass(mirror); 1058 jboolean result = k->is_interface(); 1059 assert(!result || k->oop_is_instance(), 1060 "all interfaces are instance types"); 1061 // The compiler intrinsic for isInterface tests the 1062 // Klass::_access_flags bits in the same way. 1063 return result; 1064 JVM_END 1065 1066 1067 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1068 JVMWrapper("JVM_GetClassSigners"); 1069 JvmtiVMObjectAllocEventCollector oam; 1070 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1071 // There are no signers for primitive types 1072 return NULL; 1073 } 1074 1075 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1076 objArrayOop signers = NULL; 1077 if (k->oop_is_instance()) { 1078 signers = InstanceKlass::cast(k)->signers(); 1079 } 1080 1081 // If there are no signers set in the class, or if the class 1082 // is an array, return NULL. 1083 if (signers == NULL) return NULL; 1084 1085 // copy of the signers array 1086 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1087 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1088 for (int index = 0; index < signers->length(); index++) { 1089 signers_copy->obj_at_put(index, signers->obj_at(index)); 1090 } 1091 1092 // return the copy 1093 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1094 JVM_END 1095 1096 1097 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1098 JVMWrapper("JVM_SetClassSigners"); 1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1100 // This call is ignored for primitive types and arrays. 1101 // Signers are only set once, ClassLoader.java, and thus shouldn't 1102 // be called with an array. Only the bootstrap loader creates arrays. 1103 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1104 if (k->oop_is_instance()) { 1105 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1106 } 1107 } 1108 JVM_END 1109 1110 1111 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1112 JVMWrapper("JVM_GetProtectionDomain"); 1113 if (JNIHandles::resolve(cls) == NULL) { 1114 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1115 } 1116 1117 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1118 // Primitive types does not have a protection domain. 1119 return NULL; 1120 } 1121 1122 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1123 return (jobject) JNIHandles::make_local(env, k->protection_domain()); 1124 JVM_END 1125 1126 1127 // Obsolete since 1.2 (Class.setProtectionDomain removed), although 1128 // still defined in core libraries as of 1.5. 1129 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1130 JVMWrapper("JVM_SetProtectionDomain"); 1131 if (JNIHandles::resolve(cls) == NULL) { 1132 THROW(vmSymbols::java_lang_NullPointerException()); 1133 } 1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1135 // Call is ignored for primitive types 1136 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1137 1138 // cls won't be an array, as this called only from ClassLoader.defineClass 1139 if (k->oop_is_instance()) { 1140 oop pd = JNIHandles::resolve(protection_domain); 1141 assert(pd == NULL || pd->is_oop(), "just checking"); 1142 InstanceKlass::cast(k)->set_protection_domain(pd); 1143 } 1144 } 1145 JVM_END 1146 1147 1148 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1149 JVMWrapper("JVM_DoPrivileged"); 1150 1151 if (action == NULL) { 1152 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1153 } 1154 1155 // Stack allocated list of privileged stack elements 1156 PrivilegedElement pi; 1157 1158 // Check that action object understands "Object run()" 1159 Handle object (THREAD, JNIHandles::resolve(action)); 1160 1161 // get run() method 1162 Method* m_oop = object->klass()->uncached_lookup_method( 1163 vmSymbols::run_method_name(), 1164 vmSymbols::void_object_signature()); 1165 methodHandle m (THREAD, m_oop); 1166 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1167 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1168 } 1169 1170 // Compute the frame initiating the do privileged operation and setup the privileged stack 1171 vframeStream vfst(thread); 1172 vfst.security_get_caller_frame(1); 1173 1174 if (!vfst.at_end()) { 1175 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1176 thread->set_privileged_stack_top(&pi); 1177 } 1178 1179 1180 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1181 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1182 Handle pending_exception; 1183 JavaValue result(T_OBJECT); 1184 JavaCallArguments args(object); 1185 JavaCalls::call(&result, m, &args, THREAD); 1186 1187 // done with action, remove ourselves from the list 1188 if (!vfst.at_end()) { 1189 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1190 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1191 } 1192 1193 if (HAS_PENDING_EXCEPTION) { 1194 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1195 CLEAR_PENDING_EXCEPTION; 1196 1197 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1198 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1199 // Throw a java.security.PrivilegedActionException(Exception e) exception 1200 JavaCallArguments args(pending_exception); 1201 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1202 vmSymbols::exception_void_signature(), 1203 &args); 1204 } 1205 } 1206 1207 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1208 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1209 JVM_END 1210 1211 1212 // Returns the inherited_access_control_context field of the running thread. 1213 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1214 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1215 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1216 return JNIHandles::make_local(env, result); 1217 JVM_END 1218 1219 class RegisterArrayForGC { 1220 private: 1221 JavaThread *_thread; 1222 public: 1223 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1224 _thread = thread; 1225 _thread->register_array_for_gc(array); 1226 } 1227 1228 ~RegisterArrayForGC() { 1229 _thread->register_array_for_gc(NULL); 1230 } 1231 }; 1232 1233 1234 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1235 JVMWrapper("JVM_GetStackAccessControlContext"); 1236 if (!UsePrivilegedStack) return NULL; 1237 1238 ResourceMark rm(THREAD); 1239 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1240 JvmtiVMObjectAllocEventCollector oam; 1241 1242 // count the protection domains on the execution stack. We collapse 1243 // duplicate consecutive protection domains into a single one, as 1244 // well as stopping when we hit a privileged frame. 1245 1246 // Use vframeStream to iterate through Java frames 1247 vframeStream vfst(thread); 1248 1249 oop previous_protection_domain = NULL; 1250 Handle privileged_context(thread, NULL); 1251 bool is_privileged = false; 1252 oop protection_domain = NULL; 1253 1254 for(; !vfst.at_end(); vfst.next()) { 1255 // get method of frame 1256 Method* method = vfst.method(); 1257 intptr_t* frame_id = vfst.frame_id(); 1258 1259 // check the privileged frames to see if we have a match 1260 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1261 // this frame is privileged 1262 is_privileged = true; 1263 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1264 protection_domain = thread->privileged_stack_top()->protection_domain(); 1265 } else { 1266 protection_domain = method->method_holder()->protection_domain(); 1267 } 1268 1269 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1270 local_array->push(protection_domain); 1271 previous_protection_domain = protection_domain; 1272 } 1273 1274 if (is_privileged) break; 1275 } 1276 1277 1278 // either all the domains on the stack were system domains, or 1279 // we had a privileged system domain 1280 if (local_array->is_empty()) { 1281 if (is_privileged && privileged_context.is_null()) return NULL; 1282 1283 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1284 return JNIHandles::make_local(env, result); 1285 } 1286 1287 // the resource area must be registered in case of a gc 1288 RegisterArrayForGC ragc(thread, local_array); 1289 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1290 local_array->length(), CHECK_NULL); 1291 objArrayHandle h_context(thread, context); 1292 for (int index = 0; index < local_array->length(); index++) { 1293 h_context->obj_at_put(index, local_array->at(index)); 1294 } 1295 1296 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1297 1298 return JNIHandles::make_local(env, result); 1299 JVM_END 1300 1301 1302 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1303 JVMWrapper("JVM_IsArrayClass"); 1304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1305 return (k != NULL) && k->oop_is_array() ? true : false; 1306 JVM_END 1307 1308 1309 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1310 JVMWrapper("JVM_IsPrimitiveClass"); 1311 oop mirror = JNIHandles::resolve_non_null(cls); 1312 return (jboolean) java_lang_Class::is_primitive(mirror); 1313 JVM_END 1314 1315 1316 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1317 JVMWrapper("JVM_GetComponentType"); 1318 oop mirror = JNIHandles::resolve_non_null(cls); 1319 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1320 return (jclass) JNIHandles::make_local(env, result); 1321 JVM_END 1322 1323 1324 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1325 JVMWrapper("JVM_GetClassModifiers"); 1326 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1327 // Primitive type 1328 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1329 } 1330 1331 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1332 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1333 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1334 return k->modifier_flags(); 1335 JVM_END 1336 1337 1338 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1339 1340 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1341 JvmtiVMObjectAllocEventCollector oam; 1342 // ofClass is a reference to a java_lang_Class object. The mirror object 1343 // of an InstanceKlass 1344 1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1346 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1347 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1348 return (jobjectArray)JNIHandles::make_local(env, result); 1349 } 1350 1351 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1352 InnerClassesIterator iter(k); 1353 1354 if (iter.length() == 0) { 1355 // Neither an inner nor outer class 1356 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1357 return (jobjectArray)JNIHandles::make_local(env, result); 1358 } 1359 1360 // find inner class info 1361 constantPoolHandle cp(thread, k->constants()); 1362 int length = iter.length(); 1363 1364 // Allocate temp. result array 1365 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1366 objArrayHandle result (THREAD, r); 1367 int members = 0; 1368 1369 for (; !iter.done(); iter.next()) { 1370 int ioff = iter.inner_class_info_index(); 1371 int ooff = iter.outer_class_info_index(); 1372 1373 if (ioff != 0 && ooff != 0) { 1374 // Check to see if the name matches the class we're looking for 1375 // before attempting to find the class. 1376 if (cp->klass_name_at_matches(k, ooff)) { 1377 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1378 if (outer_klass == k()) { 1379 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1380 instanceKlassHandle inner_klass (THREAD, ik); 1381 1382 // Throws an exception if outer klass has not declared k as 1383 // an inner klass 1384 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1385 1386 result->obj_at_put(members, inner_klass->java_mirror()); 1387 members++; 1388 } 1389 } 1390 } 1391 } 1392 1393 if (members != length) { 1394 // Return array of right length 1395 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1396 for(int i = 0; i < members; i++) { 1397 res->obj_at_put(i, result->obj_at(i)); 1398 } 1399 return (jobjectArray)JNIHandles::make_local(env, res); 1400 } 1401 1402 return (jobjectArray)JNIHandles::make_local(env, result()); 1403 JVM_END 1404 1405 1406 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1407 { 1408 // ofClass is a reference to a java_lang_Class object. 1409 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1410 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1411 return NULL; 1412 } 1413 1414 bool inner_is_member = false; 1415 Klass* outer_klass 1416 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1417 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1418 if (outer_klass == NULL) return NULL; // already a top-level class 1419 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1420 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1421 } 1422 JVM_END 1423 1424 // should be in InstanceKlass.cpp, but is here for historical reasons 1425 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1426 bool* inner_is_member, 1427 TRAPS) { 1428 Thread* thread = THREAD; 1429 InnerClassesIterator iter(k); 1430 if (iter.length() == 0) { 1431 // No inner class info => no declaring class 1432 return NULL; 1433 } 1434 1435 constantPoolHandle i_cp(thread, k->constants()); 1436 1437 bool found = false; 1438 Klass* ok; 1439 instanceKlassHandle outer_klass; 1440 *inner_is_member = false; 1441 1442 // Find inner_klass attribute 1443 for (; !iter.done() && !found; iter.next()) { 1444 int ioff = iter.inner_class_info_index(); 1445 int ooff = iter.outer_class_info_index(); 1446 int noff = iter.inner_name_index(); 1447 if (ioff != 0) { 1448 // Check to see if the name matches the class we're looking for 1449 // before attempting to find the class. 1450 if (i_cp->klass_name_at_matches(k, ioff)) { 1451 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1452 found = (k() == inner_klass); 1453 if (found && ooff != 0) { 1454 ok = i_cp->klass_at(ooff, CHECK_NULL); 1455 outer_klass = instanceKlassHandle(thread, ok); 1456 *inner_is_member = true; 1457 } 1458 } 1459 } 1460 } 1461 1462 if (found && outer_klass.is_null()) { 1463 // It may be anonymous; try for that. 1464 int encl_method_class_idx = k->enclosing_method_class_index(); 1465 if (encl_method_class_idx != 0) { 1466 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1467 outer_klass = instanceKlassHandle(thread, ok); 1468 *inner_is_member = false; 1469 } 1470 } 1471 1472 // If no inner class attribute found for this class. 1473 if (outer_klass.is_null()) return NULL; 1474 1475 // Throws an exception if outer klass has not declared k as an inner klass 1476 // We need evidence that each klass knows about the other, or else 1477 // the system could allow a spoof of an inner class to gain access rights. 1478 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1479 return outer_klass(); 1480 } 1481 1482 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1483 assert (cls != NULL, "illegal class"); 1484 JVMWrapper("JVM_GetClassSignature"); 1485 JvmtiVMObjectAllocEventCollector oam; 1486 ResourceMark rm(THREAD); 1487 // Return null for arrays and primatives 1488 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1490 if (k->oop_is_instance()) { 1491 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1492 if (sym == NULL) return NULL; 1493 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1494 return (jstring) JNIHandles::make_local(env, str()); 1495 } 1496 } 1497 return NULL; 1498 JVM_END 1499 1500 1501 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1502 assert (cls != NULL, "illegal class"); 1503 JVMWrapper("JVM_GetClassAnnotations"); 1504 1505 // Return null for arrays and primitives 1506 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1508 if (k->oop_is_instance()) { 1509 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1510 return (jbyteArray) JNIHandles::make_local(env, a); 1511 } 1512 } 1513 return NULL; 1514 JVM_END 1515 1516 1517 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1518 // some of this code was adapted from from jni_FromReflectedField 1519 1520 oop reflected = JNIHandles::resolve_non_null(field); 1521 oop mirror = java_lang_reflect_Field::clazz(reflected); 1522 Klass* k = java_lang_Class::as_Klass(mirror); 1523 int slot = java_lang_reflect_Field::slot(reflected); 1524 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1525 1526 KlassHandle kh(THREAD, k); 1527 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1528 1529 if (modifiers & JVM_ACC_STATIC) { 1530 // for static fields we only look in the current class 1531 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1532 assert(false, "cannot find static field"); 1533 return false; 1534 } 1535 } else { 1536 // for instance fields we start with the current class and work 1537 // our way up through the superclass chain 1538 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1539 assert(false, "cannot find instance field"); 1540 return false; 1541 } 1542 } 1543 return true; 1544 } 1545 1546 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1547 // field is a handle to a java.lang.reflect.Field object 1548 assert(field != NULL, "illegal field"); 1549 JVMWrapper("JVM_GetFieldAnnotations"); 1550 1551 fieldDescriptor fd; 1552 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1553 if (!gotFd) { 1554 return NULL; 1555 } 1556 1557 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1558 JVM_END 1559 1560 1561 static Method* jvm_get_method_common(jobject method) { 1562 // some of this code was adapted from from jni_FromReflectedMethod 1563 1564 oop reflected = JNIHandles::resolve_non_null(method); 1565 oop mirror = NULL; 1566 int slot = 0; 1567 1568 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1569 mirror = java_lang_reflect_Constructor::clazz(reflected); 1570 slot = java_lang_reflect_Constructor::slot(reflected); 1571 } else { 1572 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1573 "wrong type"); 1574 mirror = java_lang_reflect_Method::clazz(reflected); 1575 slot = java_lang_reflect_Method::slot(reflected); 1576 } 1577 Klass* k = java_lang_Class::as_Klass(mirror); 1578 1579 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1580 assert(m != NULL, "cannot find method"); 1581 return m; // caller has to deal with NULL in product mode 1582 } 1583 1584 1585 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1586 JVMWrapper("JVM_GetMethodAnnotations"); 1587 1588 // method is a handle to a java.lang.reflect.Method object 1589 Method* m = jvm_get_method_common(method); 1590 if (m == NULL) { 1591 return NULL; 1592 } 1593 1594 return (jbyteArray) JNIHandles::make_local(env, 1595 Annotations::make_java_array(m->annotations(), THREAD)); 1596 JVM_END 1597 1598 1599 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1600 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1601 1602 // method is a handle to a java.lang.reflect.Method object 1603 Method* m = jvm_get_method_common(method); 1604 if (m == NULL) { 1605 return NULL; 1606 } 1607 1608 return (jbyteArray) JNIHandles::make_local(env, 1609 Annotations::make_java_array(m->annotation_default(), THREAD)); 1610 JVM_END 1611 1612 1613 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1614 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1615 1616 // method is a handle to a java.lang.reflect.Method object 1617 Method* m = jvm_get_method_common(method); 1618 if (m == NULL) { 1619 return NULL; 1620 } 1621 1622 return (jbyteArray) JNIHandles::make_local(env, 1623 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1624 JVM_END 1625 1626 /* Type use annotations support (JDK 1.8) */ 1627 1628 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1629 assert (cls != NULL, "illegal class"); 1630 JVMWrapper("JVM_GetClassTypeAnnotations"); 1631 ResourceMark rm(THREAD); 1632 // Return null for arrays and primitives 1633 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1634 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1635 if (k->oop_is_instance()) { 1636 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1637 if (type_annotations != NULL) { 1638 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1639 return (jbyteArray) JNIHandles::make_local(env, a); 1640 } 1641 } 1642 } 1643 return NULL; 1644 JVM_END 1645 1646 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1647 assert (method != NULL, "illegal method"); 1648 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1649 1650 // method is a handle to a java.lang.reflect.Method object 1651 Method* m = jvm_get_method_common(method); 1652 if (m == NULL) { 1653 return NULL; 1654 } 1655 1656 AnnotationArray* type_annotations = m->type_annotations(); 1657 if (type_annotations != NULL) { 1658 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1659 return (jbyteArray) JNIHandles::make_local(env, a); 1660 } 1661 1662 return NULL; 1663 JVM_END 1664 1665 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1666 assert (field != NULL, "illegal field"); 1667 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1668 1669 fieldDescriptor fd; 1670 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1671 if (!gotFd) { 1672 return NULL; 1673 } 1674 1675 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1676 JVM_END 1677 1678 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1679 if (!cp->is_within_bounds(index)) { 1680 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1681 } 1682 } 1683 1684 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1685 { 1686 JVMWrapper("JVM_GetMethodParameters"); 1687 // method is a handle to a java.lang.reflect.Method object 1688 Method* method_ptr = jvm_get_method_common(method); 1689 methodHandle mh (THREAD, method_ptr); 1690 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1691 const int num_params = mh->method_parameters_length(); 1692 1693 if (0 != num_params) { 1694 // make sure all the symbols are properly formatted 1695 for (int i = 0; i < num_params; i++) { 1696 MethodParametersElement* params = mh->method_parameters_start(); 1697 int index = params[i].name_cp_index; 1698 bounds_check(mh->constants(), index, CHECK_NULL); 1699 1700 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1701 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1702 "Wrong type at constant pool index"); 1703 } 1704 1705 } 1706 1707 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1708 objArrayHandle result (THREAD, result_oop); 1709 1710 for (int i = 0; i < num_params; i++) { 1711 MethodParametersElement* params = mh->method_parameters_start(); 1712 // For a 0 index, give a NULL symbol 1713 Symbol* const sym = 0 != params[i].name_cp_index ? 1714 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1715 int flags = params[i].flags; 1716 oop param = Reflection::new_parameter(reflected_method, i, sym, 1717 flags, CHECK_NULL); 1718 result->obj_at_put(i, param); 1719 } 1720 return (jobjectArray)JNIHandles::make_local(env, result()); 1721 } else { 1722 return (jobjectArray)NULL; 1723 } 1724 } 1725 JVM_END 1726 1727 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1728 1729 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1730 { 1731 JVMWrapper("JVM_GetClassDeclaredFields"); 1732 JvmtiVMObjectAllocEventCollector oam; 1733 1734 // Exclude primitive types and array types 1735 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1736 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1737 // Return empty array 1738 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1739 return (jobjectArray) JNIHandles::make_local(env, res); 1740 } 1741 1742 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1743 constantPoolHandle cp(THREAD, k->constants()); 1744 1745 // Ensure class is linked 1746 k->link_class(CHECK_NULL); 1747 1748 // 4496456 We need to filter out java.lang.Throwable.backtrace 1749 bool skip_backtrace = false; 1750 1751 // Allocate result 1752 int num_fields; 1753 1754 if (publicOnly) { 1755 num_fields = 0; 1756 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1757 if (fs.access_flags().is_public()) ++num_fields; 1758 } 1759 } else { 1760 num_fields = k->java_fields_count(); 1761 1762 if (k() == SystemDictionary::Throwable_klass()) { 1763 num_fields--; 1764 skip_backtrace = true; 1765 } 1766 } 1767 1768 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1769 objArrayHandle result (THREAD, r); 1770 1771 int out_idx = 0; 1772 fieldDescriptor fd; 1773 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1774 if (skip_backtrace) { 1775 // 4496456 skip java.lang.Throwable.backtrace 1776 int offset = fs.offset(); 1777 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1778 } 1779 1780 if (!publicOnly || fs.access_flags().is_public()) { 1781 fd.initialize(k(), fs.index()); 1782 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1783 result->obj_at_put(out_idx, field); 1784 ++out_idx; 1785 } 1786 } 1787 assert(out_idx == num_fields, "just checking"); 1788 return (jobjectArray) JNIHandles::make_local(env, result()); 1789 } 1790 JVM_END 1791 1792 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1793 { 1794 JVMWrapper("JVM_GetClassDeclaredMethods"); 1795 JvmtiVMObjectAllocEventCollector oam; 1796 1797 // Exclude primitive types and array types 1798 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1799 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1800 // Return empty array 1801 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1802 return (jobjectArray) JNIHandles::make_local(env, res); 1803 } 1804 1805 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1806 1807 // Ensure class is linked 1808 k->link_class(CHECK_NULL); 1809 1810 Array<Method*>* methods = k->methods(); 1811 int methods_length = methods->length(); 1812 int num_methods = 0; 1813 1814 int i; 1815 for (i = 0; i < methods_length; i++) { 1816 methodHandle method(THREAD, methods->at(i)); 1817 if (!method->is_initializer() && !method->is_overpass()) { 1818 if (!publicOnly || method->is_public()) { 1819 ++num_methods; 1820 } 1821 } 1822 } 1823 1824 // Allocate result 1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1826 objArrayHandle result (THREAD, r); 1827 1828 int out_idx = 0; 1829 for (i = 0; i < methods_length; i++) { 1830 methodHandle method(THREAD, methods->at(i)); 1831 if (!method->is_initializer() && !method->is_overpass()) { 1832 if (!publicOnly || method->is_public()) { 1833 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1834 result->obj_at_put(out_idx, m); 1835 ++out_idx; 1836 } 1837 } 1838 } 1839 assert(out_idx == num_methods, "just checking"); 1840 return (jobjectArray) JNIHandles::make_local(env, result()); 1841 } 1842 JVM_END 1843 1844 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1845 { 1846 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1847 JvmtiVMObjectAllocEventCollector oam; 1848 1849 // Exclude primitive types and array types 1850 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1851 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1852 // Return empty array 1853 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1854 return (jobjectArray) JNIHandles::make_local(env, res); 1855 } 1856 1857 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1858 1859 // Ensure class is linked 1860 k->link_class(CHECK_NULL); 1861 1862 Array<Method*>* methods = k->methods(); 1863 int methods_length = methods->length(); 1864 int num_constructors = 0; 1865 1866 int i; 1867 for (i = 0; i < methods_length; i++) { 1868 methodHandle method(THREAD, methods->at(i)); 1869 if (method->is_initializer() && !method->is_static()) { 1870 if (!publicOnly || method->is_public()) { 1871 ++num_constructors; 1872 } 1873 } 1874 } 1875 1876 // Allocate result 1877 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1878 objArrayHandle result(THREAD, r); 1879 1880 int out_idx = 0; 1881 for (i = 0; i < methods_length; i++) { 1882 methodHandle method(THREAD, methods->at(i)); 1883 if (method->is_initializer() && !method->is_static()) { 1884 if (!publicOnly || method->is_public()) { 1885 oop m = Reflection::new_constructor(method, CHECK_NULL); 1886 result->obj_at_put(out_idx, m); 1887 ++out_idx; 1888 } 1889 } 1890 } 1891 assert(out_idx == num_constructors, "just checking"); 1892 return (jobjectArray) JNIHandles::make_local(env, result()); 1893 } 1894 JVM_END 1895 1896 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1897 { 1898 JVMWrapper("JVM_GetClassAccessFlags"); 1899 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1900 // Primitive type 1901 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1902 } 1903 1904 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1905 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1906 } 1907 JVM_END 1908 1909 1910 // Constant pool access ////////////////////////////////////////////////////////// 1911 1912 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1913 { 1914 JVMWrapper("JVM_GetClassConstantPool"); 1915 JvmtiVMObjectAllocEventCollector oam; 1916 1917 // Return null for primitives and arrays 1918 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1919 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1920 if (k->oop_is_instance()) { 1921 instanceKlassHandle k_h(THREAD, k); 1922 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1923 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1924 return JNIHandles::make_local(jcp()); 1925 } 1926 } 1927 return NULL; 1928 } 1929 JVM_END 1930 1931 1932 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1933 { 1934 JVMWrapper("JVM_ConstantPoolGetSize"); 1935 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1936 return cp->length(); 1937 } 1938 JVM_END 1939 1940 1941 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1942 { 1943 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1944 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1945 bounds_check(cp, index, CHECK_NULL); 1946 constantTag tag = cp->tag_at(index); 1947 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1948 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1949 } 1950 Klass* k = cp->klass_at(index, CHECK_NULL); 1951 return (jclass) JNIHandles::make_local(k->java_mirror()); 1952 } 1953 JVM_END 1954 1955 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1956 { 1957 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1958 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1959 bounds_check(cp, index, CHECK_NULL); 1960 constantTag tag = cp->tag_at(index); 1961 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1962 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1963 } 1964 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 1965 if (k == NULL) return NULL; 1966 return (jclass) JNIHandles::make_local(k->java_mirror()); 1967 } 1968 JVM_END 1969 1970 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1971 constantTag tag = cp->tag_at(index); 1972 if (!tag.is_method() && !tag.is_interface_method()) { 1973 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1974 } 1975 int klass_ref = cp->uncached_klass_ref_index_at(index); 1976 Klass* k_o; 1977 if (force_resolution) { 1978 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1979 } else { 1980 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 1981 if (k_o == NULL) return NULL; 1982 } 1983 instanceKlassHandle k(THREAD, k_o); 1984 Symbol* name = cp->uncached_name_ref_at(index); 1985 Symbol* sig = cp->uncached_signature_ref_at(index); 1986 methodHandle m (THREAD, k->find_method(name, sig)); 1987 if (m.is_null()) { 1988 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1989 } 1990 oop method; 1991 if (!m->is_initializer() || m->is_static()) { 1992 method = Reflection::new_method(m, true, true, CHECK_NULL); 1993 } else { 1994 method = Reflection::new_constructor(m, CHECK_NULL); 1995 } 1996 return JNIHandles::make_local(method); 1997 } 1998 1999 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2000 { 2001 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2002 JvmtiVMObjectAllocEventCollector oam; 2003 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2004 bounds_check(cp, index, CHECK_NULL); 2005 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2006 return res; 2007 } 2008 JVM_END 2009 2010 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2011 { 2012 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2013 JvmtiVMObjectAllocEventCollector oam; 2014 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2015 bounds_check(cp, index, CHECK_NULL); 2016 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2017 return res; 2018 } 2019 JVM_END 2020 2021 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2022 constantTag tag = cp->tag_at(index); 2023 if (!tag.is_field()) { 2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2025 } 2026 int klass_ref = cp->uncached_klass_ref_index_at(index); 2027 Klass* k_o; 2028 if (force_resolution) { 2029 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2030 } else { 2031 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2032 if (k_o == NULL) return NULL; 2033 } 2034 instanceKlassHandle k(THREAD, k_o); 2035 Symbol* name = cp->uncached_name_ref_at(index); 2036 Symbol* sig = cp->uncached_signature_ref_at(index); 2037 fieldDescriptor fd; 2038 Klass* target_klass = k->find_field(name, sig, &fd); 2039 if (target_klass == NULL) { 2040 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2041 } 2042 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2043 return JNIHandles::make_local(field); 2044 } 2045 2046 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2047 { 2048 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2049 JvmtiVMObjectAllocEventCollector oam; 2050 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2051 bounds_check(cp, index, CHECK_NULL); 2052 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2053 return res; 2054 } 2055 JVM_END 2056 2057 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2058 { 2059 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2060 JvmtiVMObjectAllocEventCollector oam; 2061 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2062 bounds_check(cp, index, CHECK_NULL); 2063 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2064 return res; 2065 } 2066 JVM_END 2067 2068 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2069 { 2070 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2071 JvmtiVMObjectAllocEventCollector oam; 2072 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2073 bounds_check(cp, index, CHECK_NULL); 2074 constantTag tag = cp->tag_at(index); 2075 if (!tag.is_field_or_method()) { 2076 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2077 } 2078 int klass_ref = cp->uncached_klass_ref_index_at(index); 2079 Symbol* klass_name = cp->klass_name_at(klass_ref); 2080 Symbol* member_name = cp->uncached_name_ref_at(index); 2081 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2082 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2083 objArrayHandle dest(THREAD, dest_o); 2084 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2085 dest->obj_at_put(0, str()); 2086 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2087 dest->obj_at_put(1, str()); 2088 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2089 dest->obj_at_put(2, str()); 2090 return (jobjectArray) JNIHandles::make_local(dest()); 2091 } 2092 JVM_END 2093 2094 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2095 { 2096 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2097 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2098 bounds_check(cp, index, CHECK_0); 2099 constantTag tag = cp->tag_at(index); 2100 if (!tag.is_int()) { 2101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2102 } 2103 return cp->int_at(index); 2104 } 2105 JVM_END 2106 2107 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2108 { 2109 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2110 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2111 bounds_check(cp, index, CHECK_(0L)); 2112 constantTag tag = cp->tag_at(index); 2113 if (!tag.is_long()) { 2114 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2115 } 2116 return cp->long_at(index); 2117 } 2118 JVM_END 2119 2120 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2121 { 2122 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2123 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2124 bounds_check(cp, index, CHECK_(0.0f)); 2125 constantTag tag = cp->tag_at(index); 2126 if (!tag.is_float()) { 2127 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2128 } 2129 return cp->float_at(index); 2130 } 2131 JVM_END 2132 2133 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2134 { 2135 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2137 bounds_check(cp, index, CHECK_(0.0)); 2138 constantTag tag = cp->tag_at(index); 2139 if (!tag.is_double()) { 2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2141 } 2142 return cp->double_at(index); 2143 } 2144 JVM_END 2145 2146 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2147 { 2148 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2149 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2150 bounds_check(cp, index, CHECK_NULL); 2151 constantTag tag = cp->tag_at(index); 2152 if (!tag.is_string()) { 2153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2154 } 2155 oop str = cp->string_at(index, CHECK_NULL); 2156 return (jstring) JNIHandles::make_local(str); 2157 } 2158 JVM_END 2159 2160 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2161 { 2162 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2163 JvmtiVMObjectAllocEventCollector oam; 2164 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2165 bounds_check(cp, index, CHECK_NULL); 2166 constantTag tag = cp->tag_at(index); 2167 if (!tag.is_symbol()) { 2168 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2169 } 2170 Symbol* sym = cp->symbol_at(index); 2171 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2172 return (jstring) JNIHandles::make_local(str()); 2173 } 2174 JVM_END 2175 2176 2177 // Assertion support. ////////////////////////////////////////////////////////// 2178 2179 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2180 JVMWrapper("JVM_DesiredAssertionStatus"); 2181 assert(cls != NULL, "bad class"); 2182 2183 oop r = JNIHandles::resolve(cls); 2184 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2185 if (java_lang_Class::is_primitive(r)) return false; 2186 2187 Klass* k = java_lang_Class::as_Klass(r); 2188 assert(k->oop_is_instance(), "must be an instance klass"); 2189 if (! k->oop_is_instance()) return false; 2190 2191 ResourceMark rm(THREAD); 2192 const char* name = k->name()->as_C_string(); 2193 bool system_class = k->class_loader() == NULL; 2194 return JavaAssertions::enabled(name, system_class); 2195 2196 JVM_END 2197 2198 2199 // Return a new AssertionStatusDirectives object with the fields filled in with 2200 // command-line assertion arguments (i.e., -ea, -da). 2201 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2202 JVMWrapper("JVM_AssertionStatusDirectives"); 2203 JvmtiVMObjectAllocEventCollector oam; 2204 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2205 return JNIHandles::make_local(env, asd); 2206 JVM_END 2207 2208 // Verification //////////////////////////////////////////////////////////////////////////////// 2209 2210 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2211 2212 // RedefineClasses support: bug 6214132 caused verification to fail. 2213 // All functions from this section should call the jvmtiThreadSate function: 2214 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2215 // The function returns a Klass* of the _scratch_class if the verifier 2216 // was invoked in the middle of the class redefinition. 2217 // Otherwise it returns its argument value which is the _the_class Klass*. 2218 // Please, refer to the description in the jvmtiThreadSate.hpp. 2219 2220 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2221 JVMWrapper("JVM_GetClassNameUTF"); 2222 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2223 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2224 return k->name()->as_utf8(); 2225 JVM_END 2226 2227 2228 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2229 JVMWrapper("JVM_GetClassCPTypes"); 2230 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2232 // types will have length zero if this is not an InstanceKlass 2233 // (length is determined by call to JVM_GetClassCPEntriesCount) 2234 if (k->oop_is_instance()) { 2235 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2236 for (int index = cp->length() - 1; index >= 0; index--) { 2237 constantTag tag = cp->tag_at(index); 2238 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2239 } 2240 } 2241 JVM_END 2242 2243 2244 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2245 JVMWrapper("JVM_GetClassCPEntriesCount"); 2246 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2247 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2248 if (!k->oop_is_instance()) 2249 return 0; 2250 return InstanceKlass::cast(k)->constants()->length(); 2251 JVM_END 2252 2253 2254 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2255 JVMWrapper("JVM_GetClassFieldsCount"); 2256 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2257 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2258 if (!k->oop_is_instance()) 2259 return 0; 2260 return InstanceKlass::cast(k)->java_fields_count(); 2261 JVM_END 2262 2263 2264 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2265 JVMWrapper("JVM_GetClassMethodsCount"); 2266 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2268 if (!k->oop_is_instance()) 2269 return 0; 2270 return InstanceKlass::cast(k)->methods()->length(); 2271 JVM_END 2272 2273 2274 // The following methods, used for the verifier, are never called with 2275 // array klasses, so a direct cast to InstanceKlass is safe. 2276 // Typically, these methods are called in a loop with bounds determined 2277 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2278 // zero for arrays. 2279 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2280 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2281 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2282 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2283 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2284 int length = method->checked_exceptions_length(); 2285 if (length > 0) { 2286 CheckedExceptionElement* table= method->checked_exceptions_start(); 2287 for (int i = 0; i < length; i++) { 2288 exceptions[i] = table[i].class_cp_index; 2289 } 2290 } 2291 JVM_END 2292 2293 2294 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2295 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2298 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2299 return method->checked_exceptions_length(); 2300 JVM_END 2301 2302 2303 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2304 JVMWrapper("JVM_GetMethodIxByteCode"); 2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2307 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2308 memcpy(code, method->code_base(), method->code_size()); 2309 JVM_END 2310 2311 2312 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2313 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2314 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2316 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2317 return method->code_size(); 2318 JVM_END 2319 2320 2321 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2322 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2323 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2324 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2325 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2326 ExceptionTable extable(method); 2327 entry->start_pc = extable.start_pc(entry_index); 2328 entry->end_pc = extable.end_pc(entry_index); 2329 entry->handler_pc = extable.handler_pc(entry_index); 2330 entry->catchType = extable.catch_type_index(entry_index); 2331 JVM_END 2332 2333 2334 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2335 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2336 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2337 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2338 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2339 return method->exception_table_length(); 2340 JVM_END 2341 2342 2343 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2344 JVMWrapper("JVM_GetMethodIxModifiers"); 2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2347 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2348 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2349 JVM_END 2350 2351 2352 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2353 JVMWrapper("JVM_GetFieldIxModifiers"); 2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2356 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2357 JVM_END 2358 2359 2360 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2361 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2365 return method->max_locals(); 2366 JVM_END 2367 2368 2369 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2370 JVMWrapper("JVM_GetMethodIxArgsSize"); 2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2374 return method->size_of_parameters(); 2375 JVM_END 2376 2377 2378 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2379 JVMWrapper("JVM_GetMethodIxMaxStack"); 2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2383 return method->verifier_max_stack(); 2384 JVM_END 2385 2386 2387 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2388 JVMWrapper("JVM_IsConstructorIx"); 2389 ResourceMark rm(THREAD); 2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2393 return method->name() == vmSymbols::object_initializer_name(); 2394 JVM_END 2395 2396 2397 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2398 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2399 ResourceMark rm(THREAD); 2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2402 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2403 return method->is_overpass(); 2404 JVM_END 2405 2406 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2407 JVMWrapper("JVM_GetMethodIxIxUTF"); 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->name()->as_utf8(); 2412 JVM_END 2413 2414 2415 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2416 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 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->signature()->as_utf8(); 2421 JVM_END 2422 2423 /** 2424 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2425 * read entries in the constant pool. Since the old verifier always 2426 * works on a copy of the code, it will not see any rewriting that 2427 * may possibly occur in the middle of verification. So it is important 2428 * that nothing it calls tries to use the cpCache instead of the raw 2429 * constant pool, so we must use cp->uncached_x methods when appropriate. 2430 */ 2431 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2432 JVMWrapper("JVM_GetCPFieldNameUTF"); 2433 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2434 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2435 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2436 switch (cp->tag_at(cp_index).value()) { 2437 case JVM_CONSTANT_Fieldref: 2438 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2439 default: 2440 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2441 } 2442 ShouldNotReachHere(); 2443 return NULL; 2444 JVM_END 2445 2446 2447 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2448 JVMWrapper("JVM_GetCPMethodNameUTF"); 2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2451 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2452 switch (cp->tag_at(cp_index).value()) { 2453 case JVM_CONSTANT_InterfaceMethodref: 2454 case JVM_CONSTANT_Methodref: 2455 case JVM_CONSTANT_NameAndType: // for invokedynamic 2456 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2457 default: 2458 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2459 } 2460 ShouldNotReachHere(); 2461 return NULL; 2462 JVM_END 2463 2464 2465 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2466 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2467 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2469 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2470 switch (cp->tag_at(cp_index).value()) { 2471 case JVM_CONSTANT_InterfaceMethodref: 2472 case JVM_CONSTANT_Methodref: 2473 case JVM_CONSTANT_NameAndType: // for invokedynamic 2474 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2475 default: 2476 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2477 } 2478 ShouldNotReachHere(); 2479 return NULL; 2480 JVM_END 2481 2482 2483 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2484 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2486 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2487 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2488 switch (cp->tag_at(cp_index).value()) { 2489 case JVM_CONSTANT_Fieldref: 2490 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2491 default: 2492 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2493 } 2494 ShouldNotReachHere(); 2495 return NULL; 2496 JVM_END 2497 2498 2499 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2500 JVMWrapper("JVM_GetCPClassNameUTF"); 2501 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2503 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2504 Symbol* classname = cp->klass_name_at(cp_index); 2505 return classname->as_utf8(); 2506 JVM_END 2507 2508 2509 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2510 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2513 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2514 switch (cp->tag_at(cp_index).value()) { 2515 case JVM_CONSTANT_Fieldref: { 2516 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2517 Symbol* classname = cp->klass_name_at(class_index); 2518 return classname->as_utf8(); 2519 } 2520 default: 2521 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2522 } 2523 ShouldNotReachHere(); 2524 return NULL; 2525 JVM_END 2526 2527 2528 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2529 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2532 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2533 switch (cp->tag_at(cp_index).value()) { 2534 case JVM_CONSTANT_Methodref: 2535 case JVM_CONSTANT_InterfaceMethodref: { 2536 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2537 Symbol* classname = cp->klass_name_at(class_index); 2538 return classname->as_utf8(); 2539 } 2540 default: 2541 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2542 } 2543 ShouldNotReachHere(); 2544 return NULL; 2545 JVM_END 2546 2547 2548 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2549 JVMWrapper("JVM_GetCPFieldModifiers"); 2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2551 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2553 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2554 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2555 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2556 switch (cp->tag_at(cp_index).value()) { 2557 case JVM_CONSTANT_Fieldref: { 2558 Symbol* name = cp->uncached_name_ref_at(cp_index); 2559 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2560 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2561 if (fs.name() == name && fs.signature() == signature) { 2562 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2563 } 2564 } 2565 return -1; 2566 } 2567 default: 2568 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2569 } 2570 ShouldNotReachHere(); 2571 return 0; 2572 JVM_END 2573 2574 2575 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2576 JVMWrapper("JVM_GetCPMethodModifiers"); 2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2578 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2580 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2581 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2582 switch (cp->tag_at(cp_index).value()) { 2583 case JVM_CONSTANT_Methodref: 2584 case JVM_CONSTANT_InterfaceMethodref: { 2585 Symbol* name = cp->uncached_name_ref_at(cp_index); 2586 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2587 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2588 int methods_count = methods->length(); 2589 for (int i = 0; i < methods_count; i++) { 2590 Method* method = methods->at(i); 2591 if (method->name() == name && method->signature() == signature) { 2592 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2593 } 2594 } 2595 return -1; 2596 } 2597 default: 2598 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2599 } 2600 ShouldNotReachHere(); 2601 return 0; 2602 JVM_END 2603 2604 2605 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2606 2607 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2608 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2609 JVM_END 2610 2611 2612 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2613 JVMWrapper("JVM_IsSameClassPackage"); 2614 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2615 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2616 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2617 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2618 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2619 JVM_END 2620 2621 2622 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2623 2624 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2625 JVMWrapper2("JVM_Open (%s)", fname); 2626 2627 //%note jvm_r6 2628 int result = os::open(fname, flags, mode); 2629 if (result >= 0) { 2630 return result; 2631 } else { 2632 switch(errno) { 2633 case EEXIST: 2634 return JVM_EEXIST; 2635 default: 2636 return -1; 2637 } 2638 } 2639 JVM_END 2640 2641 2642 JVM_LEAF(jint, JVM_Close(jint fd)) 2643 JVMWrapper2("JVM_Close (0x%x)", fd); 2644 //%note jvm_r6 2645 return os::close(fd); 2646 JVM_END 2647 2648 2649 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2650 JVMWrapper2("JVM_Read (0x%x)", fd); 2651 2652 //%note jvm_r6 2653 return (jint)os::restartable_read(fd, buf, nbytes); 2654 JVM_END 2655 2656 2657 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2658 JVMWrapper2("JVM_Write (0x%x)", fd); 2659 2660 //%note jvm_r6 2661 return (jint)os::write(fd, buf, nbytes); 2662 JVM_END 2663 2664 2665 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2666 JVMWrapper2("JVM_Available (0x%x)", fd); 2667 //%note jvm_r6 2668 return os::available(fd, pbytes); 2669 JVM_END 2670 2671 2672 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2673 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2674 //%note jvm_r6 2675 return os::lseek(fd, offset, whence); 2676 JVM_END 2677 2678 2679 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2680 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2681 return os::ftruncate(fd, length); 2682 JVM_END 2683 2684 2685 JVM_LEAF(jint, JVM_Sync(jint fd)) 2686 JVMWrapper2("JVM_Sync (0x%x)", fd); 2687 //%note jvm_r6 2688 return os::fsync(fd); 2689 JVM_END 2690 2691 2692 // Printing support ////////////////////////////////////////////////// 2693 extern "C" { 2694 2695 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2696 // see bug 4399518, 4417214 2697 if ((intptr_t)count <= 0) return -1; 2698 return vsnprintf(str, count, fmt, args); 2699 } 2700 2701 2702 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2703 va_list args; 2704 int len; 2705 va_start(args, fmt); 2706 len = jio_vsnprintf(str, count, fmt, args); 2707 va_end(args); 2708 return len; 2709 } 2710 2711 2712 int jio_fprintf(FILE* f, const char *fmt, ...) { 2713 int len; 2714 va_list args; 2715 va_start(args, fmt); 2716 len = jio_vfprintf(f, fmt, args); 2717 va_end(args); 2718 return len; 2719 } 2720 2721 2722 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2723 if (Arguments::vfprintf_hook() != NULL) { 2724 return Arguments::vfprintf_hook()(f, fmt, args); 2725 } else { 2726 return vfprintf(f, fmt, args); 2727 } 2728 } 2729 2730 2731 JNIEXPORT int jio_printf(const char *fmt, ...) { 2732 int len; 2733 va_list args; 2734 va_start(args, fmt); 2735 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2736 va_end(args); 2737 return len; 2738 } 2739 2740 2741 // HotSpot specific jio method 2742 void jio_print(const char* s) { 2743 // Try to make this function as atomic as possible. 2744 if (Arguments::vfprintf_hook() != NULL) { 2745 jio_fprintf(defaultStream::output_stream(), "%s", s); 2746 } else { 2747 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2748 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2749 } 2750 } 2751 2752 } // Extern C 2753 2754 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2755 2756 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2757 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2758 // OSThread objects. The exception to this rule is when the target object is the thread 2759 // doing the operation, in which case we know that the thread won't exit until the 2760 // operation is done (all exits being voluntary). There are a few cases where it is 2761 // rather silly to do operations on yourself, like resuming yourself or asking whether 2762 // you are alive. While these can still happen, they are not subject to deadlocks if 2763 // the lock is held while the operation occurs (this is not the case for suspend, for 2764 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2765 // implementation is local to this file, we always lock Threads_lock for that one. 2766 2767 static void thread_entry(JavaThread* thread, TRAPS) { 2768 HandleMark hm(THREAD); 2769 Handle obj(THREAD, thread->threadObj()); 2770 JavaValue result(T_VOID); 2771 JavaCalls::call_virtual(&result, 2772 obj, 2773 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2774 vmSymbols::run_method_name(), 2775 vmSymbols::void_method_signature(), 2776 THREAD); 2777 } 2778 2779 2780 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2781 JVMWrapper("JVM_StartThread"); 2782 JavaThread *native_thread = NULL; 2783 2784 // We cannot hold the Threads_lock when we throw an exception, 2785 // due to rank ordering issues. Example: we might need to grab the 2786 // Heap_lock while we construct the exception. 2787 bool throw_illegal_thread_state = false; 2788 2789 // We must release the Threads_lock before we can post a jvmti event 2790 // in Thread::start. 2791 { 2792 // Ensure that the C++ Thread and OSThread structures aren't freed before 2793 // we operate. 2794 MutexLocker mu(Threads_lock); 2795 2796 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2797 // re-starting an already started thread, so we should usually find 2798 // that the JavaThread is null. However for a JNI attached thread 2799 // there is a small window between the Thread object being created 2800 // (with its JavaThread set) and the update to its threadStatus, so we 2801 // have to check for this 2802 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2803 throw_illegal_thread_state = true; 2804 } else { 2805 // We could also check the stillborn flag to see if this thread was already stopped, but 2806 // for historical reasons we let the thread detect that itself when it starts running 2807 2808 jlong size = 2809 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2810 // Allocate the C++ Thread structure and create the native thread. The 2811 // stack size retrieved from java is signed, but the constructor takes 2812 // size_t (an unsigned type), so avoid passing negative values which would 2813 // result in really large stacks. 2814 size_t sz = size > 0 ? (size_t) size : 0; 2815 native_thread = new JavaThread(&thread_entry, sz); 2816 2817 // At this point it may be possible that no osthread was created for the 2818 // JavaThread due to lack of memory. Check for this situation and throw 2819 // an exception if necessary. Eventually we may want to change this so 2820 // that we only grab the lock if the thread was created successfully - 2821 // then we can also do this check and throw the exception in the 2822 // JavaThread constructor. 2823 if (native_thread->osthread() != NULL) { 2824 // Note: the current thread is not being used within "prepare". 2825 native_thread->prepare(jthread); 2826 } 2827 } 2828 } 2829 2830 if (throw_illegal_thread_state) { 2831 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2832 } 2833 2834 assert(native_thread != NULL, "Starting null thread?"); 2835 2836 if (native_thread->osthread() == NULL) { 2837 // No one should hold a reference to the 'native_thread'. 2838 delete native_thread; 2839 if (JvmtiExport::should_post_resource_exhausted()) { 2840 JvmtiExport::post_resource_exhausted( 2841 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2842 "unable to create new native thread"); 2843 } 2844 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2845 "unable to create new native thread"); 2846 } 2847 2848 Thread::start(native_thread); 2849 2850 JVM_END 2851 2852 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2853 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2854 // but is thought to be reliable and simple. In the case, where the receiver is the 2855 // same thread as the sender, no safepoint is needed. 2856 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2857 JVMWrapper("JVM_StopThread"); 2858 2859 oop java_throwable = JNIHandles::resolve(throwable); 2860 if (java_throwable == NULL) { 2861 THROW(vmSymbols::java_lang_NullPointerException()); 2862 } 2863 oop java_thread = JNIHandles::resolve_non_null(jthread); 2864 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2865 Events::log_exception(JavaThread::current(), 2866 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2867 receiver, (address)java_thread, throwable); 2868 // First check if thread is alive 2869 if (receiver != NULL) { 2870 // Check if exception is getting thrown at self (use oop equality, since the 2871 // target object might exit) 2872 if (java_thread == thread->threadObj()) { 2873 THROW_OOP(java_throwable); 2874 } else { 2875 // Enques a VM_Operation to stop all threads and then deliver the exception... 2876 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2877 } 2878 } 2879 else { 2880 // Either: 2881 // - target thread has not been started before being stopped, or 2882 // - target thread already terminated 2883 // We could read the threadStatus to determine which case it is 2884 // but that is overkill as it doesn't matter. We must set the 2885 // stillborn flag for the first case, and if the thread has already 2886 // exited setting this flag has no affect 2887 java_lang_Thread::set_stillborn(java_thread); 2888 } 2889 JVM_END 2890 2891 2892 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2893 JVMWrapper("JVM_IsThreadAlive"); 2894 2895 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2896 return java_lang_Thread::is_alive(thread_oop); 2897 JVM_END 2898 2899 2900 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2901 JVMWrapper("JVM_SuspendThread"); 2902 oop java_thread = JNIHandles::resolve_non_null(jthread); 2903 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2904 2905 if (receiver != NULL) { 2906 // thread has run and has not exited (still on threads list) 2907 2908 { 2909 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2910 if (receiver->is_external_suspend()) { 2911 // Don't allow nested external suspend requests. We can't return 2912 // an error from this interface so just ignore the problem. 2913 return; 2914 } 2915 if (receiver->is_exiting()) { // thread is in the process of exiting 2916 return; 2917 } 2918 receiver->set_external_suspend(); 2919 } 2920 2921 // java_suspend() will catch threads in the process of exiting 2922 // and will ignore them. 2923 receiver->java_suspend(); 2924 2925 // It would be nice to have the following assertion in all the 2926 // time, but it is possible for a racing resume request to have 2927 // resumed this thread right after we suspended it. Temporarily 2928 // enable this assertion if you are chasing a different kind of 2929 // bug. 2930 // 2931 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2932 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2933 } 2934 JVM_END 2935 2936 2937 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2938 JVMWrapper("JVM_ResumeThread"); 2939 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2940 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2941 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2942 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2943 // looks at it. 2944 MutexLocker ml(Threads_lock); 2945 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2946 if (thr != NULL) { 2947 // the thread has run and is not in the process of exiting 2948 thr->java_resume(); 2949 } 2950 JVM_END 2951 2952 2953 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2954 JVMWrapper("JVM_SetThreadPriority"); 2955 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2956 MutexLocker ml(Threads_lock); 2957 oop java_thread = JNIHandles::resolve_non_null(jthread); 2958 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2959 JavaThread* thr = java_lang_Thread::thread(java_thread); 2960 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2961 Thread::set_priority(thr, (ThreadPriority)prio); 2962 } 2963 JVM_END 2964 2965 2966 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2967 JVMWrapper("JVM_Yield"); 2968 if (os::dont_yield()) return; 2969 #ifndef USDT2 2970 HS_DTRACE_PROBE0(hotspot, thread__yield); 2971 #else /* USDT2 */ 2972 HOTSPOT_THREAD_YIELD(); 2973 #endif /* USDT2 */ 2974 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2975 // Critical for similar threading behaviour 2976 if (ConvertYieldToSleep) { 2977 os::sleep(thread, MinSleepInterval, false); 2978 } else { 2979 os::yield(); 2980 } 2981 JVM_END 2982 2983 2984 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2985 JVMWrapper("JVM_Sleep"); 2986 2987 if (millis < 0) { 2988 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2989 } 2990 2991 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2992 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2993 } 2994 2995 // Save current thread state and restore it at the end of this block. 2996 // And set new thread state to SLEEPING. 2997 JavaThreadSleepState jtss(thread); 2998 2999 #ifndef USDT2 3000 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 3001 #else /* USDT2 */ 3002 HOTSPOT_THREAD_SLEEP_BEGIN( 3003 millis); 3004 #endif /* USDT2 */ 3005 3006 if (millis == 0) { 3007 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3008 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3009 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3010 // for SOLARIS 3011 if (ConvertSleepToYield) { 3012 os::yield(); 3013 } else { 3014 ThreadState old_state = thread->osthread()->get_state(); 3015 thread->osthread()->set_state(SLEEPING); 3016 os::sleep(thread, MinSleepInterval, false); 3017 thread->osthread()->set_state(old_state); 3018 } 3019 } else { 3020 ThreadState old_state = thread->osthread()->get_state(); 3021 thread->osthread()->set_state(SLEEPING); 3022 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3023 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3024 // us while we were sleeping. We do not overwrite those. 3025 if (!HAS_PENDING_EXCEPTION) { 3026 #ifndef USDT2 3027 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 3028 #else /* USDT2 */ 3029 HOTSPOT_THREAD_SLEEP_END( 3030 1); 3031 #endif /* USDT2 */ 3032 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3033 // to properly restore the thread state. That's likely wrong. 3034 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3035 } 3036 } 3037 thread->osthread()->set_state(old_state); 3038 } 3039 #ifndef USDT2 3040 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 3041 #else /* USDT2 */ 3042 HOTSPOT_THREAD_SLEEP_END( 3043 0); 3044 #endif /* USDT2 */ 3045 JVM_END 3046 3047 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3048 JVMWrapper("JVM_CurrentThread"); 3049 oop jthread = thread->threadObj(); 3050 assert (thread != NULL, "no current thread!"); 3051 return JNIHandles::make_local(env, jthread); 3052 JVM_END 3053 3054 3055 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3056 JVMWrapper("JVM_CountStackFrames"); 3057 3058 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3059 oop java_thread = JNIHandles::resolve_non_null(jthread); 3060 bool throw_illegal_thread_state = false; 3061 int count = 0; 3062 3063 { 3064 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3065 // We need to re-resolve the java_thread, since a GC might have happened during the 3066 // acquire of the lock 3067 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3068 3069 if (thr == NULL) { 3070 // do nothing 3071 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3072 // Check whether this java thread has been suspended already. If not, throws 3073 // IllegalThreadStateException. We defer to throw that exception until 3074 // Threads_lock is released since loading exception class has to leave VM. 3075 // The correct way to test a thread is actually suspended is 3076 // wait_for_ext_suspend_completion(), but we can't call that while holding 3077 // the Threads_lock. The above tests are sufficient for our purposes 3078 // provided the walkability of the stack is stable - which it isn't 3079 // 100% but close enough for most practical purposes. 3080 throw_illegal_thread_state = true; 3081 } else { 3082 // Count all java activation, i.e., number of vframes 3083 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3084 // Native frames are not counted 3085 if (!vfst.method()->is_native()) count++; 3086 } 3087 } 3088 } 3089 3090 if (throw_illegal_thread_state) { 3091 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3092 "this thread is not suspended"); 3093 } 3094 return count; 3095 JVM_END 3096 3097 // Consider: A better way to implement JVM_Interrupt() is to acquire 3098 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3099 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3100 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3101 // outside the critical section. Threads_lock is hot so we want to minimize 3102 // the hold-time. A cleaner interface would be to decompose interrupt into 3103 // two steps. The 1st phase, performed under Threads_lock, would return 3104 // a closure that'd be invoked after Threads_lock was dropped. 3105 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3106 // admit spurious wakeups. 3107 3108 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3109 JVMWrapper("JVM_Interrupt"); 3110 3111 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3112 oop java_thread = JNIHandles::resolve_non_null(jthread); 3113 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3114 // We need to re-resolve the java_thread, since a GC might have happened during the 3115 // acquire of the lock 3116 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3117 if (thr != NULL) { 3118 Thread::interrupt(thr); 3119 } 3120 JVM_END 3121 3122 3123 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3124 JVMWrapper("JVM_IsInterrupted"); 3125 3126 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3127 oop java_thread = JNIHandles::resolve_non_null(jthread); 3128 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3129 // We need to re-resolve the java_thread, since a GC might have happened during the 3130 // acquire of the lock 3131 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3132 if (thr == NULL) { 3133 return JNI_FALSE; 3134 } else { 3135 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3136 } 3137 JVM_END 3138 3139 3140 // Return true iff the current thread has locked the object passed in 3141 3142 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3143 JVMWrapper("JVM_HoldsLock"); 3144 assert(THREAD->is_Java_thread(), "sanity check"); 3145 if (obj == NULL) { 3146 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3147 } 3148 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3149 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3150 JVM_END 3151 3152 3153 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3154 JVMWrapper("JVM_DumpAllStacks"); 3155 VM_PrintThreads op; 3156 VMThread::execute(&op); 3157 if (JvmtiExport::should_post_data_dump()) { 3158 JvmtiExport::post_data_dump(); 3159 } 3160 JVM_END 3161 3162 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3163 JVMWrapper("JVM_SetNativeThreadName"); 3164 ResourceMark rm(THREAD); 3165 oop java_thread = JNIHandles::resolve_non_null(jthread); 3166 JavaThread* thr = java_lang_Thread::thread(java_thread); 3167 // Thread naming only supported for the current thread, doesn't work for 3168 // target threads. 3169 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3170 // we don't set the name of an attached thread to avoid stepping 3171 // on other programs 3172 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3173 os::set_native_thread_name(thread_name); 3174 } 3175 JVM_END 3176 3177 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3178 3179 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3180 assert(jthread->is_Java_thread(), "must be a Java thread"); 3181 if (jthread->privileged_stack_top() == NULL) return false; 3182 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3183 oop loader = jthread->privileged_stack_top()->class_loader(); 3184 if (loader == NULL) return true; 3185 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3186 if (trusted) return true; 3187 } 3188 return false; 3189 } 3190 3191 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3192 JVMWrapper("JVM_CurrentLoadedClass"); 3193 ResourceMark rm(THREAD); 3194 3195 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3196 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3197 bool trusted = is_trusted_frame(thread, &vfst); 3198 if (trusted) return NULL; 3199 3200 Method* m = vfst.method(); 3201 if (!m->is_native()) { 3202 InstanceKlass* holder = m->method_holder(); 3203 oop loader = holder->class_loader(); 3204 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3205 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3206 } 3207 } 3208 } 3209 return NULL; 3210 JVM_END 3211 3212 3213 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3214 JVMWrapper("JVM_CurrentClassLoader"); 3215 ResourceMark rm(THREAD); 3216 3217 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3218 3219 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3220 bool trusted = is_trusted_frame(thread, &vfst); 3221 if (trusted) return NULL; 3222 3223 Method* m = vfst.method(); 3224 if (!m->is_native()) { 3225 InstanceKlass* holder = m->method_holder(); 3226 assert(holder->is_klass(), "just checking"); 3227 oop loader = holder->class_loader(); 3228 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3229 return JNIHandles::make_local(env, loader); 3230 } 3231 } 3232 } 3233 return NULL; 3234 JVM_END 3235 3236 3237 // Utility object for collecting method holders walking down the stack 3238 class KlassLink: public ResourceObj { 3239 public: 3240 KlassHandle klass; 3241 KlassLink* next; 3242 3243 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3244 }; 3245 3246 3247 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3248 JVMWrapper("JVM_GetClassContext"); 3249 ResourceMark rm(THREAD); 3250 JvmtiVMObjectAllocEventCollector oam; 3251 // Collect linked list of (handles to) method holders 3252 KlassLink* first = NULL; 3253 KlassLink* last = NULL; 3254 int depth = 0; 3255 vframeStream vfst(thread); 3256 3257 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3258 // This must only be called from SecurityManager.getClassContext 3259 Method* m = vfst.method(); 3260 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3261 m->name() == vmSymbols::getClassContext_name() && 3262 m->signature() == vmSymbols::void_class_array_signature())) { 3263 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3264 } 3265 } 3266 3267 // Collect method holders 3268 for (; !vfst.at_end(); vfst.security_next()) { 3269 Method* m = vfst.method(); 3270 // Native frames are not returned 3271 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3272 Klass* holder = m->method_holder(); 3273 assert(holder->is_klass(), "just checking"); 3274 depth++; 3275 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3276 if (first == NULL) { 3277 first = last = l; 3278 } else { 3279 last->next = l; 3280 last = l; 3281 } 3282 } 3283 } 3284 3285 // Create result array of type [Ljava/lang/Class; 3286 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3287 // Fill in mirrors corresponding to method holders 3288 int index = 0; 3289 while (first != NULL) { 3290 result->obj_at_put(index++, first->klass()->java_mirror()); 3291 first = first->next; 3292 } 3293 assert(index == depth, "just checking"); 3294 3295 return (jobjectArray) JNIHandles::make_local(env, result); 3296 JVM_END 3297 3298 3299 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3300 JVMWrapper("JVM_ClassDepth"); 3301 ResourceMark rm(THREAD); 3302 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3303 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3304 3305 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3306 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3307 if (class_name_sym == NULL) { 3308 return -1; 3309 } 3310 3311 int depth = 0; 3312 3313 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3314 if (!vfst.method()->is_native()) { 3315 InstanceKlass* holder = vfst.method()->method_holder(); 3316 assert(holder->is_klass(), "just checking"); 3317 if (holder->name() == class_name_sym) { 3318 return depth; 3319 } 3320 depth++; 3321 } 3322 } 3323 return -1; 3324 JVM_END 3325 3326 3327 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3328 JVMWrapper("JVM_ClassLoaderDepth"); 3329 ResourceMark rm(THREAD); 3330 int depth = 0; 3331 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3332 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3333 bool trusted = is_trusted_frame(thread, &vfst); 3334 if (trusted) return -1; 3335 3336 Method* m = vfst.method(); 3337 if (!m->is_native()) { 3338 InstanceKlass* holder = m->method_holder(); 3339 assert(holder->is_klass(), "just checking"); 3340 oop loader = holder->class_loader(); 3341 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3342 return depth; 3343 } 3344 depth++; 3345 } 3346 } 3347 return -1; 3348 JVM_END 3349 3350 3351 // java.lang.Package //////////////////////////////////////////////////////////////// 3352 3353 3354 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3355 JVMWrapper("JVM_GetSystemPackage"); 3356 ResourceMark rm(THREAD); 3357 JvmtiVMObjectAllocEventCollector oam; 3358 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3359 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3360 return (jstring) JNIHandles::make_local(result); 3361 JVM_END 3362 3363 3364 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3365 JVMWrapper("JVM_GetSystemPackages"); 3366 JvmtiVMObjectAllocEventCollector oam; 3367 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3368 return (jobjectArray) JNIHandles::make_local(result); 3369 JVM_END 3370 3371 3372 // ObjectInputStream /////////////////////////////////////////////////////////////// 3373 3374 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3375 if (current_class == NULL) { 3376 return true; 3377 } 3378 if ((current_class == field_class) || access.is_public()) { 3379 return true; 3380 } 3381 3382 if (access.is_protected()) { 3383 // See if current_class is a subclass of field_class 3384 if (current_class->is_subclass_of(field_class)) { 3385 return true; 3386 } 3387 } 3388 3389 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3390 } 3391 3392 3393 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3394 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3395 JVMWrapper("JVM_AllocateNewObject"); 3396 JvmtiVMObjectAllocEventCollector oam; 3397 // Receiver is not used 3398 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3399 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3400 3401 // Cannot instantiate primitive types 3402 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3403 ResourceMark rm(THREAD); 3404 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3405 } 3406 3407 // Arrays not allowed here, must use JVM_AllocateNewArray 3408 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3409 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3410 ResourceMark rm(THREAD); 3411 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3412 } 3413 3414 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3415 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3416 3417 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3418 3419 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3420 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3421 3422 // Make sure klass is initialized, since we are about to instantiate one of them. 3423 curr_klass->initialize(CHECK_NULL); 3424 3425 methodHandle m (THREAD, 3426 init_klass->find_method(vmSymbols::object_initializer_name(), 3427 vmSymbols::void_method_signature())); 3428 if (m.is_null()) { 3429 ResourceMark rm(THREAD); 3430 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3431 Method::name_and_sig_as_C_string(init_klass(), 3432 vmSymbols::object_initializer_name(), 3433 vmSymbols::void_method_signature())); 3434 } 3435 3436 if (curr_klass == init_klass && !m->is_public()) { 3437 // Calling the constructor for class 'curr_klass'. 3438 // Only allow calls to a public no-arg constructor. 3439 // This path corresponds to creating an Externalizable object. 3440 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3441 } 3442 3443 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3444 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3445 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3446 } 3447 3448 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3449 // Call constructor m. This might call a constructor higher up in the hierachy 3450 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3451 3452 return JNIHandles::make_local(obj()); 3453 JVM_END 3454 3455 3456 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3457 JVMWrapper("JVM_AllocateNewArray"); 3458 JvmtiVMObjectAllocEventCollector oam; 3459 oop mirror = JNIHandles::resolve_non_null(currClass); 3460 3461 if (java_lang_Class::is_primitive(mirror)) { 3462 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3463 } 3464 Klass* k = java_lang_Class::as_Klass(mirror); 3465 oop result; 3466 3467 if (k->oop_is_typeArray()) { 3468 // typeArray 3469 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3470 } else if (k->oop_is_objArray()) { 3471 // objArray 3472 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3473 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3474 result = oak->allocate(length, CHECK_NULL); 3475 } else { 3476 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3477 } 3478 return JNIHandles::make_local(env, result); 3479 JVM_END 3480 3481 3482 // Return the first non-null class loader up the execution stack, or null 3483 // if only code from the null class loader is on the stack. 3484 3485 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3486 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3487 // UseNewReflection 3488 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3489 oop loader = vfst.method()->method_holder()->class_loader(); 3490 if (loader != NULL) { 3491 return JNIHandles::make_local(env, loader); 3492 } 3493 } 3494 return NULL; 3495 JVM_END 3496 3497 3498 // Load a class relative to the most recent class on the stack with a non-null 3499 // classloader. 3500 // This function has been deprecated and should not be considered part of the 3501 // specified JVM interface. 3502 3503 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3504 jclass currClass, jstring currClassName)) 3505 JVMWrapper("JVM_LoadClass0"); 3506 // Receiver is not used 3507 ResourceMark rm(THREAD); 3508 3509 // Class name argument is not guaranteed to be in internal format 3510 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3511 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3512 3513 const char* str = java_lang_String::as_utf8_string(string()); 3514 3515 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3516 // It's impossible to create this class; the name cannot fit 3517 // into the constant pool. 3518 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3519 } 3520 3521 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3522 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3523 // Find the most recent class on the stack with a non-null classloader 3524 oop loader = NULL; 3525 oop protection_domain = NULL; 3526 if (curr_klass.is_null()) { 3527 for (vframeStream vfst(thread); 3528 !vfst.at_end() && loader == NULL; 3529 vfst.next()) { 3530 if (!vfst.method()->is_native()) { 3531 InstanceKlass* holder = vfst.method()->method_holder(); 3532 loader = holder->class_loader(); 3533 protection_domain = holder->protection_domain(); 3534 } 3535 } 3536 } else { 3537 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3538 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3539 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3540 } 3541 Handle h_loader(THREAD, loader); 3542 Handle h_prot (THREAD, protection_domain); 3543 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3544 false, thread); 3545 if (TraceClassResolution && result != NULL) { 3546 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3547 } 3548 return result; 3549 JVM_END 3550 3551 3552 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3553 3554 3555 // resolve array handle and check arguments 3556 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3557 if (arr == NULL) { 3558 THROW_0(vmSymbols::java_lang_NullPointerException()); 3559 } 3560 oop a = JNIHandles::resolve_non_null(arr); 3561 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3562 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3563 } 3564 return arrayOop(a); 3565 } 3566 3567 3568 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3569 JVMWrapper("JVM_GetArrayLength"); 3570 arrayOop a = check_array(env, arr, false, CHECK_0); 3571 return a->length(); 3572 JVM_END 3573 3574 3575 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3576 JVMWrapper("JVM_Array_Get"); 3577 JvmtiVMObjectAllocEventCollector oam; 3578 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3579 jvalue value; 3580 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3581 oop box = Reflection::box(&value, type, CHECK_NULL); 3582 return JNIHandles::make_local(env, box); 3583 JVM_END 3584 3585 3586 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3587 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3588 jvalue value; 3589 value.i = 0; // to initialize value before getting used in CHECK 3590 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3591 assert(a->is_typeArray(), "just checking"); 3592 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3593 BasicType wide_type = (BasicType) wCode; 3594 if (type != wide_type) { 3595 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3596 } 3597 return value; 3598 JVM_END 3599 3600 3601 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3602 JVMWrapper("JVM_SetArrayElement"); 3603 arrayOop a = check_array(env, arr, false, CHECK); 3604 oop box = JNIHandles::resolve(val); 3605 jvalue value; 3606 value.i = 0; // to initialize value before getting used in CHECK 3607 BasicType value_type; 3608 if (a->is_objArray()) { 3609 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3610 value_type = Reflection::unbox_for_regular_object(box, &value); 3611 } else { 3612 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3613 } 3614 Reflection::array_set(&value, a, index, value_type, CHECK); 3615 JVM_END 3616 3617 3618 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3619 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3620 arrayOop a = check_array(env, arr, true, CHECK); 3621 assert(a->is_typeArray(), "just checking"); 3622 BasicType value_type = (BasicType) vCode; 3623 Reflection::array_set(&v, a, index, value_type, CHECK); 3624 JVM_END 3625 3626 3627 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3628 JVMWrapper("JVM_NewArray"); 3629 JvmtiVMObjectAllocEventCollector oam; 3630 oop element_mirror = JNIHandles::resolve(eltClass); 3631 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3632 return JNIHandles::make_local(env, result); 3633 JVM_END 3634 3635 3636 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3637 JVMWrapper("JVM_NewMultiArray"); 3638 JvmtiVMObjectAllocEventCollector oam; 3639 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3640 oop element_mirror = JNIHandles::resolve(eltClass); 3641 assert(dim_array->is_typeArray(), "just checking"); 3642 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3643 return JNIHandles::make_local(env, result); 3644 JVM_END 3645 3646 3647 // Networking library support //////////////////////////////////////////////////////////////////// 3648 3649 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3650 JVMWrapper("JVM_InitializeSocketLibrary"); 3651 return 0; 3652 JVM_END 3653 3654 3655 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3656 JVMWrapper("JVM_Socket"); 3657 return os::socket(domain, type, protocol); 3658 JVM_END 3659 3660 3661 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3662 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3663 //%note jvm_r6 3664 return os::socket_close(fd); 3665 JVM_END 3666 3667 3668 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3669 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3670 //%note jvm_r6 3671 return os::socket_shutdown(fd, howto); 3672 JVM_END 3673 3674 3675 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3676 JVMWrapper2("JVM_Recv (0x%x)", fd); 3677 //%note jvm_r6 3678 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3679 JVM_END 3680 3681 3682 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3683 JVMWrapper2("JVM_Send (0x%x)", fd); 3684 //%note jvm_r6 3685 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3686 JVM_END 3687 3688 3689 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3690 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3691 //%note jvm_r6 3692 return os::timeout(fd, timeout); 3693 JVM_END 3694 3695 3696 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3697 JVMWrapper2("JVM_Listen (0x%x)", fd); 3698 //%note jvm_r6 3699 return os::listen(fd, count); 3700 JVM_END 3701 3702 3703 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3704 JVMWrapper2("JVM_Connect (0x%x)", fd); 3705 //%note jvm_r6 3706 return os::connect(fd, him, (socklen_t)len); 3707 JVM_END 3708 3709 3710 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3711 JVMWrapper2("JVM_Bind (0x%x)", fd); 3712 //%note jvm_r6 3713 return os::bind(fd, him, (socklen_t)len); 3714 JVM_END 3715 3716 3717 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3718 JVMWrapper2("JVM_Accept (0x%x)", fd); 3719 //%note jvm_r6 3720 socklen_t socklen = (socklen_t)(*len); 3721 jint result = os::accept(fd, him, &socklen); 3722 *len = (jint)socklen; 3723 return result; 3724 JVM_END 3725 3726 3727 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3728 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3729 //%note jvm_r6 3730 socklen_t socklen = (socklen_t)(*fromlen); 3731 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3732 *fromlen = (int)socklen; 3733 return result; 3734 JVM_END 3735 3736 3737 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3738 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3739 //%note jvm_r6 3740 socklen_t socklen = (socklen_t)(*len); 3741 jint result = os::get_sock_name(fd, him, &socklen); 3742 *len = (int)socklen; 3743 return result; 3744 JVM_END 3745 3746 3747 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3748 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3749 //%note jvm_r6 3750 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3751 JVM_END 3752 3753 3754 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3755 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3756 //%note jvm_r6 3757 return os::socket_available(fd, pbytes); 3758 JVM_END 3759 3760 3761 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3762 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3763 //%note jvm_r6 3764 socklen_t socklen = (socklen_t)(*optlen); 3765 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3766 *optlen = (int)socklen; 3767 return result; 3768 JVM_END 3769 3770 3771 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3772 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3773 //%note jvm_r6 3774 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3775 JVM_END 3776 3777 3778 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3779 JVMWrapper("JVM_GetHostName"); 3780 return os::get_host_name(name, namelen); 3781 JVM_END 3782 3783 3784 // Library support /////////////////////////////////////////////////////////////////////////// 3785 3786 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3787 //%note jvm_ct 3788 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3789 char ebuf[1024]; 3790 void *load_result; 3791 { 3792 ThreadToNativeFromVM ttnfvm(thread); 3793 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3794 } 3795 if (load_result == NULL) { 3796 char msg[1024]; 3797 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3798 // Since 'ebuf' may contain a string encoded using 3799 // platform encoding scheme, we need to pass 3800 // Exceptions::unsafe_to_utf8 to the new_exception method 3801 // as the last argument. See bug 6367357. 3802 Handle h_exception = 3803 Exceptions::new_exception(thread, 3804 vmSymbols::java_lang_UnsatisfiedLinkError(), 3805 msg, Exceptions::unsafe_to_utf8); 3806 3807 THROW_HANDLE_0(h_exception); 3808 } 3809 return load_result; 3810 JVM_END 3811 3812 3813 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3814 JVMWrapper("JVM_UnloadLibrary"); 3815 os::dll_unload(handle); 3816 JVM_END 3817 3818 3819 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3820 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3821 return os::dll_lookup(handle, name); 3822 JVM_END 3823 3824 3825 // Floating point support //////////////////////////////////////////////////////////////////// 3826 3827 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3828 JVMWrapper("JVM_IsNaN"); 3829 return g_isnan(a); 3830 JVM_END 3831 3832 3833 // JNI version /////////////////////////////////////////////////////////////////////////////// 3834 3835 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3836 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3837 return Threads::is_supported_jni_version_including_1_1(version); 3838 JVM_END 3839 3840 3841 // String support /////////////////////////////////////////////////////////////////////////// 3842 3843 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3844 JVMWrapper("JVM_InternString"); 3845 JvmtiVMObjectAllocEventCollector oam; 3846 if (str == NULL) return NULL; 3847 oop string = JNIHandles::resolve_non_null(str); 3848 oop result = StringTable::intern(string, CHECK_NULL); 3849 return (jstring) JNIHandles::make_local(env, result); 3850 JVM_END 3851 3852 3853 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3854 3855 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3856 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3857 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3858 // that only works with java threads. 3859 3860 3861 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3862 VM_Exit::block_if_vm_exited(); 3863 JVMWrapper("JVM_RawMonitorCreate"); 3864 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3865 } 3866 3867 3868 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3869 VM_Exit::block_if_vm_exited(); 3870 JVMWrapper("JVM_RawMonitorDestroy"); 3871 delete ((Mutex*) mon); 3872 } 3873 3874 3875 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3876 VM_Exit::block_if_vm_exited(); 3877 JVMWrapper("JVM_RawMonitorEnter"); 3878 ((Mutex*) mon)->jvm_raw_lock(); 3879 return 0; 3880 } 3881 3882 3883 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3884 VM_Exit::block_if_vm_exited(); 3885 JVMWrapper("JVM_RawMonitorExit"); 3886 ((Mutex*) mon)->jvm_raw_unlock(); 3887 } 3888 3889 3890 // Support for Serialization 3891 3892 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3893 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3894 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3895 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3896 3897 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3898 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3899 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3900 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3901 3902 3903 void initialize_converter_functions() { 3904 if (JDK_Version::is_gte_jdk14x_version()) { 3905 // These functions only exist for compatibility with 1.3.1 and earlier 3906 return; 3907 } 3908 3909 // called from universe_post_init() 3910 assert( 3911 int_bits_to_float_fn == NULL && 3912 long_bits_to_double_fn == NULL && 3913 float_to_int_bits_fn == NULL && 3914 double_to_long_bits_fn == NULL , 3915 "initialization done twice" 3916 ); 3917 // initialize 3918 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3919 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3920 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3921 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3922 // verify 3923 assert( 3924 int_bits_to_float_fn != NULL && 3925 long_bits_to_double_fn != NULL && 3926 float_to_int_bits_fn != NULL && 3927 double_to_long_bits_fn != NULL , 3928 "initialization failed" 3929 ); 3930 } 3931 3932 3933 // Serialization 3934 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3935 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3936 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3937 3938 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3939 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3940 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3941 oop o = JNIHandles::resolve(obj); 3942 3943 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3944 THROW(vmSymbols::java_lang_NullPointerException()); 3945 } 3946 3947 jsize nfids = fids->length(); 3948 if (nfids == 0) return; 3949 3950 if (tcodes->length() < nfids) { 3951 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3952 } 3953 3954 jsize off = 0; 3955 /* loop through fields, setting values */ 3956 for (jsize i = 0; i < nfids; i++) { 3957 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3958 int field_offset; 3959 if (fid != NULL) { 3960 // NULL is a legal value for fid, but retrieving the field offset 3961 // trigger assertion in that case 3962 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3963 } 3964 3965 switch (tcodes->char_at(i)) { 3966 case 'Z': 3967 if (fid != NULL) { 3968 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3969 o->bool_field_put(field_offset, val); 3970 } 3971 off++; 3972 break; 3973 3974 case 'B': 3975 if (fid != NULL) { 3976 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3977 } 3978 off++; 3979 break; 3980 3981 case 'C': 3982 if (fid != NULL) { 3983 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3984 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3985 o->char_field_put(field_offset, val); 3986 } 3987 off += 2; 3988 break; 3989 3990 case 'S': 3991 if (fid != NULL) { 3992 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3993 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3994 o->short_field_put(field_offset, val); 3995 } 3996 off += 2; 3997 break; 3998 3999 case 'I': 4000 if (fid != NULL) { 4001 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4002 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4003 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4004 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4005 o->int_field_put(field_offset, ival); 4006 } 4007 off += 4; 4008 break; 4009 4010 case 'F': 4011 if (fid != NULL) { 4012 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4013 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4014 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4015 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4016 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 4017 o->float_field_put(field_offset, fval); 4018 } 4019 off += 4; 4020 break; 4021 4022 case 'J': 4023 if (fid != NULL) { 4024 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4025 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4026 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4027 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4028 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4029 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4030 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4031 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4032 o->long_field_put(field_offset, lval); 4033 } 4034 off += 8; 4035 break; 4036 4037 case 'D': 4038 if (fid != NULL) { 4039 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4040 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4041 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4042 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4043 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4044 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4045 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4046 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4047 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 4048 o->double_field_put(field_offset, dval); 4049 } 4050 off += 8; 4051 break; 4052 4053 default: 4054 // Illegal typecode 4055 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4056 } 4057 } 4058 JVM_END 4059 4060 4061 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 4062 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 4063 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 4064 4065 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 4066 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 4067 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 4068 oop o = JNIHandles::resolve(obj); 4069 4070 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 4071 THROW(vmSymbols::java_lang_NullPointerException()); 4072 } 4073 4074 jsize nfids = fids->length(); 4075 if (nfids == 0) return; 4076 4077 if (tcodes->length() < nfids) { 4078 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 4079 } 4080 4081 /* loop through fields, fetching values */ 4082 jsize off = 0; 4083 for (jsize i = 0; i < nfids; i++) { 4084 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 4085 if (fid == NULL) { 4086 THROW(vmSymbols::java_lang_NullPointerException()); 4087 } 4088 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4089 4090 switch (tcodes->char_at(i)) { 4091 case 'Z': 4092 { 4093 jboolean val = o->bool_field(field_offset); 4094 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 4095 } 4096 break; 4097 4098 case 'B': 4099 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 4100 break; 4101 4102 case 'C': 4103 { 4104 jchar val = o->char_field(field_offset); 4105 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4106 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4107 } 4108 break; 4109 4110 case 'S': 4111 { 4112 jshort val = o->short_field(field_offset); 4113 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4114 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4115 } 4116 break; 4117 4118 case 'I': 4119 { 4120 jint val = o->int_field(field_offset); 4121 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4122 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4123 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4124 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4125 } 4126 break; 4127 4128 case 'F': 4129 { 4130 jfloat fval = o->float_field(field_offset); 4131 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 4132 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 4133 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 4134 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 4135 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 4136 } 4137 break; 4138 4139 case 'J': 4140 { 4141 jlong val = o->long_field(field_offset); 4142 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 4143 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 4144 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 4145 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 4146 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4147 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4148 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4149 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4150 } 4151 break; 4152 4153 case 'D': 4154 { 4155 jdouble dval = o->double_field(field_offset); 4156 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 4157 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 4158 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 4159 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 4160 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 4161 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 4162 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 4163 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 4164 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 4165 } 4166 break; 4167 4168 default: 4169 // Illegal typecode 4170 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4171 } 4172 } 4173 JVM_END 4174 4175 4176 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 4177 4178 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 4179 // Security Note: 4180 // The Java level wrapper will perform the necessary security check allowing 4181 // us to pass the NULL as the initiating class loader. 4182 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 4183 4184 KlassHandle klass_handle(THREAD, klass); 4185 // Check if we should initialize the class 4186 if (init && klass_handle->oop_is_instance()) { 4187 klass_handle->initialize(CHECK_NULL); 4188 } 4189 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 4190 } 4191 4192 4193 // Internal SQE debugging support /////////////////////////////////////////////////////////// 4194 4195 #ifndef PRODUCT 4196 4197 extern "C" { 4198 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 4199 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 4200 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 4201 } 4202 4203 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4204 JVMWrapper("JVM_AccessBoolVMFlag"); 4205 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4206 JVM_END 4207 4208 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4209 JVMWrapper("JVM_AccessVMIntFlag"); 4210 intx v; 4211 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4212 *value = (jint)v; 4213 return result; 4214 JVM_END 4215 4216 4217 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4218 JVMWrapper("JVM_VMBreakPoint"); 4219 oop the_obj = JNIHandles::resolve(obj); 4220 BREAKPOINT; 4221 JVM_END 4222 4223 4224 #endif 4225 4226 4227 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4228 4229 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4230 JVMWrapper("JVM_InvokeMethod"); 4231 Handle method_handle; 4232 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4233 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4234 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4235 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4236 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4237 jobject res = JNIHandles::make_local(env, result); 4238 if (JvmtiExport::should_post_vm_object_alloc()) { 4239 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4240 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4241 if (java_lang_Class::is_primitive(ret_type)) { 4242 // Only for primitive type vm allocates memory for java object. 4243 // See box() method. 4244 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4245 } 4246 } 4247 return res; 4248 } else { 4249 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4250 } 4251 JVM_END 4252 4253 4254 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4255 JVMWrapper("JVM_NewInstanceFromConstructor"); 4256 oop constructor_mirror = JNIHandles::resolve(c); 4257 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4258 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4259 jobject res = JNIHandles::make_local(env, result); 4260 if (JvmtiExport::should_post_vm_object_alloc()) { 4261 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4262 } 4263 return res; 4264 JVM_END 4265 4266 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4267 4268 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4269 JVMWrapper("JVM_SupportsCX8"); 4270 return VM_Version::supports_cx8(); 4271 JVM_END 4272 4273 4274 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4275 JVMWrapper("JVM_CX8Field"); 4276 jlong res; 4277 oop o = JNIHandles::resolve(obj); 4278 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4279 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4280 4281 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4282 res = Atomic::cmpxchg(newVal, addr, oldVal); 4283 4284 return res == oldVal; 4285 JVM_END 4286 4287 // DTrace /////////////////////////////////////////////////////////////////// 4288 4289 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4290 JVMWrapper("JVM_DTraceGetVersion"); 4291 return (jint)JVM_TRACING_DTRACE_VERSION; 4292 JVM_END 4293 4294 JVM_ENTRY(jlong,JVM_DTraceActivate( 4295 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4296 JVM_DTraceProvider* providers)) 4297 JVMWrapper("JVM_DTraceActivate"); 4298 return DTraceJSDT::activate( 4299 version, module_name, providers_count, providers, CHECK_0); 4300 JVM_END 4301 4302 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4303 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4304 return DTraceJSDT::is_probe_enabled(method); 4305 JVM_END 4306 4307 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4308 JVMWrapper("JVM_DTraceDispose"); 4309 DTraceJSDT::dispose(handle); 4310 JVM_END 4311 4312 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4313 JVMWrapper("JVM_DTraceIsSupported"); 4314 return DTraceJSDT::is_supported(); 4315 JVM_END 4316 4317 // Returns an array of all live Thread objects (VM internal JavaThreads, 4318 // jvmti agent threads, and JNI attaching threads are skipped) 4319 // See CR 6404306 regarding JNI attaching threads 4320 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4321 ResourceMark rm(THREAD); 4322 ThreadsListEnumerator tle(THREAD, false, false); 4323 JvmtiVMObjectAllocEventCollector oam; 4324 4325 int num_threads = tle.num_threads(); 4326 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4327 objArrayHandle threads_ah(THREAD, r); 4328 4329 for (int i = 0; i < num_threads; i++) { 4330 Handle h = tle.get_threadObj(i); 4331 threads_ah->obj_at_put(i, h()); 4332 } 4333 4334 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4335 JVM_END 4336 4337 4338 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4339 // Return StackTraceElement[][], each element is the stack trace of a thread in 4340 // the corresponding entry in the given threads array 4341 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4342 JVMWrapper("JVM_DumpThreads"); 4343 JvmtiVMObjectAllocEventCollector oam; 4344 4345 // Check if threads is null 4346 if (threads == NULL) { 4347 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4348 } 4349 4350 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4351 objArrayHandle ah(THREAD, a); 4352 int num_threads = ah->length(); 4353 // check if threads is non-empty array 4354 if (num_threads == 0) { 4355 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4356 } 4357 4358 // check if threads is not an array of objects of Thread class 4359 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4360 if (k != SystemDictionary::Thread_klass()) { 4361 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4362 } 4363 4364 ResourceMark rm(THREAD); 4365 4366 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4367 for (int i = 0; i < num_threads; i++) { 4368 oop thread_obj = ah->obj_at(i); 4369 instanceHandle h(THREAD, (instanceOop) thread_obj); 4370 thread_handle_array->append(h); 4371 } 4372 4373 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4374 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4375 4376 JVM_END 4377 4378 // JVM monitoring and management support 4379 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4380 return Management::get_jmm_interface(version); 4381 JVM_END 4382 4383 // com.sun.tools.attach.VirtualMachine agent properties support 4384 // 4385 // Initialize the agent properties with the properties maintained in the VM 4386 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4387 JVMWrapper("JVM_InitAgentProperties"); 4388 ResourceMark rm; 4389 4390 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4391 4392 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4393 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4394 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4395 return properties; 4396 JVM_END 4397 4398 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4399 { 4400 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4401 JvmtiVMObjectAllocEventCollector oam; 4402 4403 if (ofClass == NULL) { 4404 return NULL; 4405 } 4406 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4407 // Special handling for primitive objects 4408 if (java_lang_Class::is_primitive(mirror())) { 4409 return NULL; 4410 } 4411 Klass* k = java_lang_Class::as_Klass(mirror()); 4412 if (!k->oop_is_instance()) { 4413 return NULL; 4414 } 4415 instanceKlassHandle ik_h(THREAD, k); 4416 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4417 if (encl_method_class_idx == 0) { 4418 return NULL; 4419 } 4420 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4421 objArrayHandle dest(THREAD, dest_o); 4422 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4423 dest->obj_at_put(0, enc_k->java_mirror()); 4424 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4425 if (encl_method_method_idx != 0) { 4426 Symbol* sym = ik_h->constants()->symbol_at( 4427 extract_low_short_from_int( 4428 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4429 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4430 dest->obj_at_put(1, str()); 4431 sym = ik_h->constants()->symbol_at( 4432 extract_high_short_from_int( 4433 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4434 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4435 dest->obj_at_put(2, str()); 4436 } 4437 return (jobjectArray) JNIHandles::make_local(dest()); 4438 } 4439 JVM_END 4440 4441 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4442 jint javaThreadState)) 4443 { 4444 // If new thread states are added in future JDK and VM versions, 4445 // this should check if the JDK version is compatible with thread 4446 // states supported by the VM. Return NULL if not compatible. 4447 // 4448 // This function must map the VM java_lang_Thread::ThreadStatus 4449 // to the Java thread state that the JDK supports. 4450 // 4451 4452 typeArrayHandle values_h; 4453 switch (javaThreadState) { 4454 case JAVA_THREAD_STATE_NEW : { 4455 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4456 values_h = typeArrayHandle(THREAD, r); 4457 values_h->int_at_put(0, java_lang_Thread::NEW); 4458 break; 4459 } 4460 case JAVA_THREAD_STATE_RUNNABLE : { 4461 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4462 values_h = typeArrayHandle(THREAD, r); 4463 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4464 break; 4465 } 4466 case JAVA_THREAD_STATE_BLOCKED : { 4467 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4468 values_h = typeArrayHandle(THREAD, r); 4469 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4470 break; 4471 } 4472 case JAVA_THREAD_STATE_WAITING : { 4473 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4474 values_h = typeArrayHandle(THREAD, r); 4475 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4476 values_h->int_at_put(1, java_lang_Thread::PARKED); 4477 break; 4478 } 4479 case JAVA_THREAD_STATE_TIMED_WAITING : { 4480 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4481 values_h = typeArrayHandle(THREAD, r); 4482 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4483 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4484 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4485 break; 4486 } 4487 case JAVA_THREAD_STATE_TERMINATED : { 4488 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4489 values_h = typeArrayHandle(THREAD, r); 4490 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4491 break; 4492 } 4493 default: 4494 // Unknown state - probably incompatible JDK version 4495 return NULL; 4496 } 4497 4498 return (jintArray) JNIHandles::make_local(env, values_h()); 4499 } 4500 JVM_END 4501 4502 4503 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4504 jint javaThreadState, 4505 jintArray values)) 4506 { 4507 // If new thread states are added in future JDK and VM versions, 4508 // this should check if the JDK version is compatible with thread 4509 // states supported by the VM. Return NULL if not compatible. 4510 // 4511 // This function must map the VM java_lang_Thread::ThreadStatus 4512 // to the Java thread state that the JDK supports. 4513 // 4514 4515 ResourceMark rm; 4516 4517 // Check if threads is null 4518 if (values == NULL) { 4519 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4520 } 4521 4522 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4523 typeArrayHandle values_h(THREAD, v); 4524 4525 objArrayHandle names_h; 4526 switch (javaThreadState) { 4527 case JAVA_THREAD_STATE_NEW : { 4528 assert(values_h->length() == 1 && 4529 values_h->int_at(0) == java_lang_Thread::NEW, 4530 "Invalid threadStatus value"); 4531 4532 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4533 1, /* only 1 substate */ 4534 CHECK_NULL); 4535 names_h = objArrayHandle(THREAD, r); 4536 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4537 names_h->obj_at_put(0, name()); 4538 break; 4539 } 4540 case JAVA_THREAD_STATE_RUNNABLE : { 4541 assert(values_h->length() == 1 && 4542 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4543 "Invalid threadStatus value"); 4544 4545 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4546 1, /* only 1 substate */ 4547 CHECK_NULL); 4548 names_h = objArrayHandle(THREAD, r); 4549 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4550 names_h->obj_at_put(0, name()); 4551 break; 4552 } 4553 case JAVA_THREAD_STATE_BLOCKED : { 4554 assert(values_h->length() == 1 && 4555 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4556 "Invalid threadStatus value"); 4557 4558 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4559 1, /* only 1 substate */ 4560 CHECK_NULL); 4561 names_h = objArrayHandle(THREAD, r); 4562 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4563 names_h->obj_at_put(0, name()); 4564 break; 4565 } 4566 case JAVA_THREAD_STATE_WAITING : { 4567 assert(values_h->length() == 2 && 4568 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4569 values_h->int_at(1) == java_lang_Thread::PARKED, 4570 "Invalid threadStatus value"); 4571 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4572 2, /* number of substates */ 4573 CHECK_NULL); 4574 names_h = objArrayHandle(THREAD, r); 4575 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4576 CHECK_NULL); 4577 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4578 CHECK_NULL); 4579 names_h->obj_at_put(0, name0()); 4580 names_h->obj_at_put(1, name1()); 4581 break; 4582 } 4583 case JAVA_THREAD_STATE_TIMED_WAITING : { 4584 assert(values_h->length() == 3 && 4585 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4586 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4587 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4588 "Invalid threadStatus value"); 4589 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4590 3, /* number of substates */ 4591 CHECK_NULL); 4592 names_h = objArrayHandle(THREAD, r); 4593 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4594 CHECK_NULL); 4595 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4596 CHECK_NULL); 4597 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4598 CHECK_NULL); 4599 names_h->obj_at_put(0, name0()); 4600 names_h->obj_at_put(1, name1()); 4601 names_h->obj_at_put(2, name2()); 4602 break; 4603 } 4604 case JAVA_THREAD_STATE_TERMINATED : { 4605 assert(values_h->length() == 1 && 4606 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4607 "Invalid threadStatus value"); 4608 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4609 1, /* only 1 substate */ 4610 CHECK_NULL); 4611 names_h = objArrayHandle(THREAD, r); 4612 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4613 names_h->obj_at_put(0, name()); 4614 break; 4615 } 4616 default: 4617 // Unknown state - probably incompatible JDK version 4618 return NULL; 4619 } 4620 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4621 } 4622 JVM_END 4623 4624 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4625 { 4626 memset(info, 0, sizeof(info_size)); 4627 4628 info->jvm_version = Abstract_VM_Version::jvm_version(); 4629 info->update_version = 0; /* 0 in HotSpot Express VM */ 4630 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4631 4632 // when we add a new capability in the jvm_version_info struct, we should also 4633 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4634 // counter defined in runtimeService.cpp. 4635 info->is_attachable = AttachListener::is_attach_supported(); 4636 } 4637 JVM_END