1 /* 2 * Copyright (c) 1997, 2012, 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 "memory/oopFactory.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/fieldStreams.hpp" 36 #include "oops/instanceKlass.hpp" 37 #include "oops/objArrayKlass.hpp" 38 #include "prims/jvm.h" 39 #include "prims/jvm_misc.hpp" 40 #include "prims/jvmtiExport.hpp" 41 #include "prims/jvmtiThreadState.hpp" 42 #include "prims/nativeLookup.hpp" 43 #include "prims/privilegedStack.hpp" 44 #include "runtime/arguments.hpp" 45 #include "runtime/dtraceJSDT.hpp" 46 #include "runtime/handles.inline.hpp" 47 #include "runtime/init.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/jfieldIDWorkaround.hpp" 52 #include "runtime/os.hpp" 53 #include "runtime/perfData.hpp" 54 #include "runtime/reflection.hpp" 55 #include "runtime/vframe.hpp" 56 #include "runtime/vm_operations.hpp" 57 #include "services/attachListener.hpp" 58 #include "services/management.hpp" 59 #include "services/threadService.hpp" 60 #include "utilities/copy.hpp" 61 #include "utilities/defaultStream.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/events.hpp" 64 #include "utilities/histogram.hpp" 65 #include "utilities/top.hpp" 66 #include "utilities/utf8.hpp" 67 #ifdef TARGET_OS_FAMILY_linux 68 # include "jvm_linux.h" 69 #endif 70 #ifdef TARGET_OS_FAMILY_solaris 71 # include "jvm_solaris.h" 72 #endif 73 #ifdef TARGET_OS_FAMILY_windows 74 # include "jvm_windows.h" 75 #endif 76 #ifdef TARGET_OS_FAMILY_bsd 77 # include "jvm_bsd.h" 78 #endif 79 80 #include <errno.h> 81 82 #ifndef USDT2 83 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 84 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 85 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 86 #endif /* !USDT2 */ 87 88 /* 89 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 90 such ctors and calls MUST NOT come between an oop declaration/init and its 91 usage because if objects are move this may cause various memory stomps, bus 92 errors and segfaults. Here is a cookbook for causing so called "naked oop 93 failures": 94 95 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 96 JVMWrapper("JVM_GetClassDeclaredFields"); 97 98 // Object address to be held directly in mirror & not visible to GC 99 oop mirror = JNIHandles::resolve_non_null(ofClass); 100 101 // If this ctor can hit a safepoint, moving objects around, then 102 ComplexConstructor foo; 103 104 // Boom! mirror may point to JUNK instead of the intended object 105 (some dereference of mirror) 106 107 // Here's another call that may block for GC, making mirror stale 108 MutexLocker ml(some_lock); 109 110 // And here's an initializer that can result in a stale oop 111 // all in one step. 112 oop o = call_that_can_throw_exception(TRAPS); 113 114 115 The solution is to keep the oop declaration BELOW the ctor or function 116 call that might cause a GC, do another resolve to reassign the oop, or 117 consider use of a Handle instead of an oop so there is immunity from object 118 motion. But note that the "QUICK" entries below do not have a handlemark 119 and thus can only support use of handles passed in. 120 */ 121 122 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { 123 ResourceMark rm; 124 int line_number = -1; 125 const char * source_file = NULL; 126 const char * trace = "explicit"; 127 klassOop caller = NULL; 128 JavaThread* jthread = JavaThread::current(); 129 if (jthread->has_last_Java_frame()) { 130 vframeStream vfst(jthread); 131 132 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 133 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 134 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 135 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 136 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 137 138 methodOop last_caller = NULL; 139 140 while (!vfst.at_end()) { 141 methodOop m = vfst.method(); 142 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 143 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && 144 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { 145 break; 146 } 147 last_caller = m; 148 vfst.next(); 149 } 150 // if this is called from Class.forName0 and that is called from Class.forName, 151 // then print the caller of Class.forName. If this is Class.loadClass, then print 152 // that caller, otherwise keep quiet since this should be picked up elsewhere. 153 bool found_it = false; 154 if (!vfst.at_end() && 155 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 156 vfst.method()->name() == vmSymbols::forName0_name()) { 157 vfst.next(); 158 if (!vfst.at_end() && 159 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 160 vfst.method()->name() == vmSymbols::forName_name()) { 161 vfst.next(); 162 found_it = true; 163 } 164 } else if (last_caller != NULL && 165 instanceKlass::cast(last_caller->method_holder())->name() == 166 vmSymbols::java_lang_ClassLoader() && 167 (last_caller->name() == vmSymbols::loadClassInternal_name() || 168 last_caller->name() == vmSymbols::loadClass_name())) { 169 found_it = true; 170 } else if (!vfst.at_end()) { 171 if (vfst.method()->is_native()) { 172 // JNI call 173 found_it = true; 174 } 175 } 176 if (found_it && !vfst.at_end()) { 177 // found the caller 178 caller = vfst.method()->method_holder(); 179 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 180 if (line_number == -1) { 181 // show method name if it's a native method 182 trace = vfst.method()->name_and_sig_as_C_string(); 183 } 184 Symbol* s = instanceKlass::cast(caller)->source_file_name(); 185 if (s != NULL) { 186 source_file = s->as_C_string(); 187 } 188 } 189 } 190 if (caller != NULL) { 191 if (to_class != caller) { 192 const char * from = Klass::cast(caller)->external_name(); 193 const char * to = Klass::cast(to_class)->external_name(); 194 // print in a single call to reduce interleaving between threads 195 if (source_file != NULL) { 196 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 197 } else { 198 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 199 } 200 } 201 } 202 } 203 204 void trace_class_resolution(klassOop to_class) { 205 EXCEPTION_MARK; 206 trace_class_resolution_impl(to_class, THREAD); 207 if (HAS_PENDING_EXCEPTION) { 208 CLEAR_PENDING_EXCEPTION; 209 } 210 } 211 212 // Wrapper to trace JVM functions 213 214 #ifdef ASSERT 215 class JVMTraceWrapper : public StackObj { 216 public: 217 JVMTraceWrapper(const char* format, ...) { 218 if (TraceJVMCalls) { 219 va_list ap; 220 va_start(ap, format); 221 tty->print("JVM "); 222 tty->vprint_cr(format, ap); 223 va_end(ap); 224 } 225 } 226 }; 227 228 Histogram* JVMHistogram; 229 volatile jint JVMHistogram_lock = 0; 230 231 class JVMHistogramElement : public HistogramElement { 232 public: 233 JVMHistogramElement(const char* name); 234 }; 235 236 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 237 _name = elementName; 238 uintx count = 0; 239 240 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 241 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 242 count +=1; 243 if ( (WarnOnStalledSpinLock > 0) 244 && (count % WarnOnStalledSpinLock == 0)) { 245 warning("JVMHistogram_lock seems to be stalled"); 246 } 247 } 248 } 249 250 if(JVMHistogram == NULL) 251 JVMHistogram = new Histogram("JVM Call Counts",100); 252 253 JVMHistogram->add_element(this); 254 Atomic::dec(&JVMHistogram_lock); 255 } 256 257 #define JVMCountWrapper(arg) \ 258 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 259 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 260 261 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 262 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 263 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 264 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 265 #else 266 #define JVMWrapper(arg1) 267 #define JVMWrapper2(arg1, arg2) 268 #define JVMWrapper3(arg1, arg2, arg3) 269 #define JVMWrapper4(arg1, arg2, arg3, arg4) 270 #endif 271 272 273 // Interface version ///////////////////////////////////////////////////////////////////// 274 275 276 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 277 return JVM_INTERFACE_VERSION; 278 JVM_END 279 280 281 // java.lang.System ////////////////////////////////////////////////////////////////////// 282 283 284 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 285 JVMWrapper("JVM_CurrentTimeMillis"); 286 return os::javaTimeMillis(); 287 JVM_END 288 289 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 290 JVMWrapper("JVM_NanoTime"); 291 return os::javaTimeNanos(); 292 JVM_END 293 294 295 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 296 jobject dst, jint dst_pos, jint length)) 297 JVMWrapper("JVM_ArrayCopy"); 298 // Check if we have null pointers 299 if (src == NULL || dst == NULL) { 300 THROW(vmSymbols::java_lang_NullPointerException()); 301 } 302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 304 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 305 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 306 // Do copy 307 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); 308 JVM_END 309 310 311 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 312 JavaValue r(T_OBJECT); 313 // public synchronized Object put(Object key, Object value); 314 HandleMark hm(THREAD); 315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 317 JavaCalls::call_virtual(&r, 318 props, 319 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 320 vmSymbols::put_name(), 321 vmSymbols::object_object_object_signature(), 322 key_str, 323 value_str, 324 THREAD); 325 } 326 327 328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 329 330 331 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 332 JVMWrapper("JVM_InitProperties"); 333 ResourceMark rm; 334 335 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 336 337 // System property list includes both user set via -D option and 338 // jvm system specific properties. 339 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 340 PUTPROP(props, p->key(), p->value()); 341 } 342 343 // Convert the -XX:MaxDirectMemorySize= command line flag 344 // to the sun.nio.MaxDirectMemorySize property. 345 // Do this after setting user properties to prevent people 346 // from setting the value with a -D option, as requested. 347 { 348 char as_chars[256]; 349 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); 350 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 351 } 352 353 // JVM monitoring and management support 354 // Add the sun.management.compiler property for the compiler's name 355 { 356 #undef CSIZE 357 #if defined(_LP64) || defined(_WIN64) 358 #define CSIZE "64-Bit " 359 #else 360 #define CSIZE 361 #endif // 64bit 362 363 #ifdef TIERED 364 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 365 #else 366 #if defined(COMPILER1) 367 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 368 #elif defined(COMPILER2) 369 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 370 #else 371 const char* compiler_name = ""; 372 #endif // compilers 373 #endif // TIERED 374 375 if (*compiler_name != '\0' && 376 (Arguments::mode() != Arguments::_int)) { 377 PUTPROP(props, "sun.management.compiler", compiler_name); 378 } 379 } 380 381 return properties; 382 JVM_END 383 384 385 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 386 387 extern volatile jint vm_created; 388 389 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 390 if (vm_created != 0 && (code == 0)) { 391 // The VM is about to exit. We call back into Java to check whether finalizers should be run 392 Universe::run_finalizers_on_exit(); 393 } 394 before_exit(thread); 395 vm_exit(code); 396 JVM_END 397 398 399 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 400 before_exit(thread); 401 vm_exit(code); 402 JVM_END 403 404 405 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 406 register_on_exit_function(func); 407 JVM_END 408 409 410 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 411 JVMWrapper("JVM_GC"); 412 if (!DisableExplicitGC) { 413 Universe::heap()->collect(GCCause::_java_lang_system_gc); 414 } 415 JVM_END 416 417 418 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 419 JVMWrapper("JVM_MaxObjectInspectionAge"); 420 return Universe::heap()->millis_since_last_gc(); 421 JVM_END 422 423 424 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 425 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 426 JVM_END 427 428 429 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 430 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 431 JVM_END 432 433 static inline jlong convert_size_t_to_jlong(size_t val) { 434 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 435 NOT_LP64 (return (jlong)val;) 436 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 437 } 438 439 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 440 JVMWrapper("JVM_TotalMemory"); 441 size_t n = Universe::heap()->capacity(); 442 return convert_size_t_to_jlong(n); 443 JVM_END 444 445 446 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 447 JVMWrapper("JVM_FreeMemory"); 448 CollectedHeap* ch = Universe::heap(); 449 size_t n; 450 { 451 MutexLocker x(Heap_lock); 452 n = ch->capacity() - ch->used(); 453 } 454 return convert_size_t_to_jlong(n); 455 JVM_END 456 457 458 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 459 JVMWrapper("JVM_MaxMemory"); 460 size_t n = Universe::heap()->max_capacity(); 461 return convert_size_t_to_jlong(n); 462 JVM_END 463 464 465 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 466 JVMWrapper("JVM_ActiveProcessorCount"); 467 return os::active_processor_count(); 468 JVM_END 469 470 471 472 // java.lang.Throwable ////////////////////////////////////////////////////// 473 474 475 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 476 JVMWrapper("JVM_FillInStackTrace"); 477 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 478 java_lang_Throwable::fill_in_stack_trace(exception); 479 JVM_END 480 481 482 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 483 JVMWrapper("JVM_PrintStackTrace"); 484 // Note: This is no longer used in Merlin, but we still support it for compatibility. 485 oop exception = JNIHandles::resolve_non_null(receiver); 486 oop stream = JNIHandles::resolve_non_null(printable); 487 java_lang_Throwable::print_stack_trace(exception, stream); 488 JVM_END 489 490 491 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 492 JVMWrapper("JVM_GetStackTraceDepth"); 493 oop exception = JNIHandles::resolve(throwable); 494 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 495 JVM_END 496 497 498 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 499 JVMWrapper("JVM_GetStackTraceElement"); 500 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 501 oop exception = JNIHandles::resolve(throwable); 502 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 503 return JNIHandles::make_local(env, element); 504 JVM_END 505 506 507 // java.lang.Object /////////////////////////////////////////////// 508 509 510 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 511 JVMWrapper("JVM_IHashCode"); 512 // as implemented in the classic virtual machine; return 0 if object is NULL 513 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 514 JVM_END 515 516 517 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 518 JVMWrapper("JVM_MonitorWait"); 519 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 520 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); 521 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 522 if (JvmtiExport::should_post_monitor_wait()) { 523 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 524 } 525 ObjectSynchronizer::wait(obj, ms, CHECK); 526 JVM_END 527 528 529 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 530 JVMWrapper("JVM_MonitorNotify"); 531 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 532 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); 533 ObjectSynchronizer::notify(obj, CHECK); 534 JVM_END 535 536 537 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 538 JVMWrapper("JVM_MonitorNotifyAll"); 539 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 540 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); 541 ObjectSynchronizer::notifyall(obj, CHECK); 542 JVM_END 543 544 545 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 546 JVMWrapper("JVM_Clone"); 547 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 548 const KlassHandle klass (THREAD, obj->klass()); 549 JvmtiVMObjectAllocEventCollector oam; 550 551 #ifdef ASSERT 552 // Just checking that the cloneable flag is set correct 553 if (obj->is_javaArray()) { 554 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 555 } else { 556 guarantee(obj->is_instance(), "should be instanceOop"); 557 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 558 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 559 } 560 #endif 561 562 // Check if class of obj supports the Cloneable interface. 563 // All arrays are considered to be cloneable (See JLS 20.1.5) 564 if (!klass->is_cloneable()) { 565 ResourceMark rm(THREAD); 566 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 567 } 568 569 // Make shallow object copy 570 const int size = obj->size(); 571 oop new_obj = NULL; 572 if (obj->is_javaArray()) { 573 const int length = ((arrayOop)obj())->length(); 574 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 575 } else { 576 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 577 } 578 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 579 // is modifying a reference field in the clonee, a non-oop-atomic copy might 580 // be suspended in the middle of copying the pointer and end up with parts 581 // of two different pointers in the field. Subsequent dereferences will crash. 582 // 4846409: an oop-copy of objects with long or double fields or arrays of same 583 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 584 // of oops. We know objects are aligned on a minimum of an jlong boundary. 585 // The same is true of StubRoutines::object_copy and the various oop_copy 586 // variants, and of the code generated by the inline_native_clone intrinsic. 587 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 588 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 589 (size_t)align_object_size(size) / HeapWordsPerLong); 590 // Clear the header 591 new_obj->init_mark(); 592 593 // Store check (mark entire object and let gc sort it out) 594 BarrierSet* bs = Universe::heap()->barrier_set(); 595 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 596 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 597 598 // Caution: this involves a java upcall, so the clone should be 599 // "gc-robust" by this stage. 600 if (klass->has_finalizer()) { 601 assert(obj->is_instance(), "should be instanceOop"); 602 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 603 } 604 605 return JNIHandles::make_local(env, oop(new_obj)); 606 JVM_END 607 608 // java.lang.Compiler //////////////////////////////////////////////////// 609 610 // The initial cuts of the HotSpot VM will not support JITs, and all existing 611 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 612 // functions are all silently ignored unless JVM warnings are printed. 613 614 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 615 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 616 JVM_END 617 618 619 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 620 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 621 return JNI_FALSE; 622 JVM_END 623 624 625 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 626 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 627 return JNI_FALSE; 628 JVM_END 629 630 631 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 632 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 633 return JNI_FALSE; 634 JVM_END 635 636 637 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 638 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 639 return NULL; 640 JVM_END 641 642 643 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 644 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 645 JVM_END 646 647 648 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 649 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 650 JVM_END 651 652 653 654 // Error message support ////////////////////////////////////////////////////// 655 656 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 657 JVMWrapper("JVM_GetLastErrorString"); 658 return (jint)os::lasterror(buf, len); 659 JVM_END 660 661 662 // java.io.File /////////////////////////////////////////////////////////////// 663 664 JVM_LEAF(char*, JVM_NativePath(char* path)) 665 JVMWrapper2("JVM_NativePath (%s)", path); 666 return os::native_path(path); 667 JVM_END 668 669 670 // Misc. class handling /////////////////////////////////////////////////////////// 671 672 673 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 674 JVMWrapper("JVM_GetCallerClass"); 675 klassOop k = thread->security_get_caller_class(depth); 676 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 677 JVM_END 678 679 680 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 681 JVMWrapper("JVM_FindPrimitiveClass"); 682 oop mirror = NULL; 683 BasicType t = name2type(utf); 684 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 685 mirror = Universe::java_mirror(t); 686 } 687 if (mirror == NULL) { 688 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 689 } else { 690 return (jclass) JNIHandles::make_local(env, mirror); 691 } 692 JVM_END 693 694 695 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 696 JVMWrapper("JVM_ResolveClass"); 697 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 698 JVM_END 699 700 701 // Returns a class loaded by the bootstrap class loader; or null 702 // if not found. ClassNotFoundException is not thrown. 703 // 704 // Rationale behind JVM_FindClassFromBootLoader 705 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 706 // b> because of (a) java.dll has a direct dependecy on the unexported 707 // private symbol "_JVM_FindClassFromClassLoader@20". 708 // c> the launcher cannot use the private symbol as it dynamically opens 709 // the entry point, so if something changes, the launcher will fail 710 // unexpectedly at runtime, it is safest for the launcher to dlopen a 711 // stable exported interface. 712 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 713 // signature to change from _JVM_FindClassFromClassLoader@20 to 714 // JVM_FindClassFromClassLoader and will not be backward compatible 715 // with older JDKs. 716 // Thus a public/stable exported entry point is the right solution, 717 // public here means public in linker semantics, and is exported only 718 // to the JDK, and is not intended to be a public API. 719 720 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 721 const char* name)) 722 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 723 724 // Java libraries should ensure that name is never null... 725 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 726 // It's impossible to create this class; the name cannot fit 727 // into the constant pool. 728 return NULL; 729 } 730 731 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 732 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 733 if (k == NULL) { 734 return NULL; 735 } 736 737 if (TraceClassResolution) { 738 trace_class_resolution(k); 739 } 740 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 741 JVM_END 742 743 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 744 jboolean init, jobject loader, 745 jboolean throwError)) 746 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 747 throwError ? "error" : "exception"); 748 // Java libraries should ensure that name is never null... 749 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 750 // It's impossible to create this class; the name cannot fit 751 // into the constant pool. 752 if (throwError) { 753 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 754 } else { 755 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 756 } 757 } 758 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 759 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 760 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 761 Handle(), throwError, THREAD); 762 763 if (TraceClassResolution && result != NULL) { 764 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 765 } 766 return result; 767 JVM_END 768 769 770 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 771 jboolean init, jclass from)) 772 JVMWrapper2("JVM_FindClassFromClass %s", name); 773 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 774 // It's impossible to create this class; the name cannot fit 775 // into the constant pool. 776 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 777 } 778 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 779 oop from_class_oop = JNIHandles::resolve(from); 780 klassOop from_class = (from_class_oop == NULL) 781 ? (klassOop)NULL 782 : java_lang_Class::as_klassOop(from_class_oop); 783 oop class_loader = NULL; 784 oop protection_domain = NULL; 785 if (from_class != NULL) { 786 class_loader = Klass::cast(from_class)->class_loader(); 787 protection_domain = Klass::cast(from_class)->protection_domain(); 788 } 789 Handle h_loader(THREAD, class_loader); 790 Handle h_prot (THREAD, protection_domain); 791 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 792 h_prot, true, thread); 793 794 if (TraceClassResolution && result != NULL) { 795 // this function is generally only used for class loading during verification. 796 ResourceMark rm; 797 oop from_mirror = JNIHandles::resolve_non_null(from); 798 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); 799 const char * from_name = Klass::cast(from_class)->external_name(); 800 801 oop mirror = JNIHandles::resolve_non_null(result); 802 klassOop to_class = java_lang_Class::as_klassOop(mirror); 803 const char * to = Klass::cast(to_class)->external_name(); 804 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 805 } 806 807 return result; 808 JVM_END 809 810 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 811 if (loader.is_null()) { 812 return; 813 } 814 815 // check whether the current caller thread holds the lock or not. 816 // If not, increment the corresponding counter 817 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 818 ObjectSynchronizer::owner_self) { 819 counter->inc(); 820 } 821 } 822 823 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 824 // and JVM_DefineClassWithSourceCond() 825 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 826 jobject loader, const jbyte *buf, 827 jsize len, jobject pd, const char *source, 828 jboolean verify, TRAPS) { 829 if (source == NULL) source = "__JVM_DefineClass__"; 830 831 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 832 JavaThread* jt = (JavaThread*) THREAD; 833 834 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 835 ClassLoader::perf_define_appclass_selftime(), 836 ClassLoader::perf_define_appclasses(), 837 jt->get_thread_stat()->perf_recursion_counts_addr(), 838 jt->get_thread_stat()->perf_timers_addr(), 839 PerfClassTraceTime::DEFINE_CLASS); 840 841 if (UsePerfData) { 842 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 843 } 844 845 // Since exceptions can be thrown, class initialization can take place 846 // if name is NULL no check for class name in .class stream has to be made. 847 TempNewSymbol class_name = NULL; 848 if (name != NULL) { 849 const int str_len = (int)strlen(name); 850 if (str_len > Symbol::max_length()) { 851 // It's impossible to create this class; the name cannot fit 852 // into the constant pool. 853 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 854 } 855 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 856 } 857 858 ResourceMark rm(THREAD); 859 ClassFileStream st((u1*) buf, len, (char *)source); 860 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 861 if (UsePerfData) { 862 is_lock_held_by_thread(class_loader, 863 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 864 THREAD); 865 } 866 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 867 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 868 protection_domain, &st, 869 verify != 0, 870 CHECK_NULL); 871 872 if (TraceClassResolution && k != NULL) { 873 trace_class_resolution(k); 874 } 875 876 if (UsePrimordialLoaderCache) { 877 // Skip caching the reflection loader and the extension loader 878 instanceKlass* loader_klass = instanceKlass::cast((JNIHandles::resolve(loader))->klass()); 879 const char* loader_name = loader_klass->external_name(); 880 bool is_reflection_loader = strncmp(loader_name, "sun.reflect", 11) == 0 ? true : false; 881 bool is_ext_loader = strncmp(loader_name, "sun.misc.Launcher$ExtClassLoader", 32) == 0 ? true : false; 882 #ifdef ASSERT 883 tty->print("NEW LDR TYPE is %s for %s, %1x\n", loader_name, name, is_reflection_loader); 884 #endif 885 if ((!is_reflection_loader) && (!is_ext_loader)) { 886 Universe::check_or_set_cached_loader(*(class_loader.raw_value())); 887 } 888 } 889 890 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 891 } 892 893 894 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 895 JVMWrapper2("JVM_DefineClass %s", name); 896 897 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 898 JVM_END 899 900 901 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 902 JVMWrapper2("JVM_DefineClassWithSource %s", name); 903 904 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 905 JVM_END 906 907 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 908 jobject loader, const jbyte *buf, 909 jsize len, jobject pd, 910 const char *source, jboolean verify)) 911 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 912 913 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 914 JVM_END 915 916 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 917 JVMWrapper("JVM_FindLoadedClass"); 918 ResourceMark rm(THREAD); 919 920 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 921 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 922 923 const char* str = java_lang_String::as_utf8_string(string()); 924 // Sanity check, don't expect null 925 if (str == NULL) return NULL; 926 927 const int str_len = (int)strlen(str); 928 if (str_len > Symbol::max_length()) { 929 // It's impossible to create this class; the name cannot fit 930 // into the constant pool. 931 return NULL; 932 } 933 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 934 935 // Security Note: 936 // The Java level wrapper will perform the necessary security check allowing 937 // us to pass the NULL as the initiating class loader. 938 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 939 if (UsePerfData) { 940 is_lock_held_by_thread(h_loader, 941 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 942 THREAD); 943 } 944 945 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, 946 h_loader, 947 Handle(), 948 CHECK_NULL); 949 950 return (k == NULL) ? NULL : 951 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 952 JVM_END 953 954 955 // Reflection support ////////////////////////////////////////////////////////////////////////////// 956 957 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 958 assert (cls != NULL, "illegal class"); 959 JVMWrapper("JVM_GetClassName"); 960 JvmtiVMObjectAllocEventCollector oam; 961 ResourceMark rm(THREAD); 962 const char* name; 963 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 964 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 965 } else { 966 // Consider caching interned string in Klass 967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 968 assert(k->is_klass(), "just checking"); 969 name = Klass::cast(k)->external_name(); 970 } 971 oop result = StringTable::intern((char*) name, CHECK_NULL); 972 return (jstring) JNIHandles::make_local(env, result); 973 JVM_END 974 975 976 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 977 JVMWrapper("JVM_GetClassInterfaces"); 978 JvmtiVMObjectAllocEventCollector oam; 979 oop mirror = JNIHandles::resolve_non_null(cls); 980 981 // Special handling for primitive objects 982 if (java_lang_Class::is_primitive(mirror)) { 983 // Primitive objects does not have any interfaces 984 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 985 return (jobjectArray) JNIHandles::make_local(env, r); 986 } 987 988 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); 989 // Figure size of result array 990 int size; 991 if (klass->oop_is_instance()) { 992 size = instanceKlass::cast(klass())->local_interfaces()->length(); 993 } else { 994 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 995 size = 2; 996 } 997 998 // Allocate result array 999 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1000 objArrayHandle result (THREAD, r); 1001 // Fill in result 1002 if (klass->oop_is_instance()) { 1003 // Regular instance klass, fill in all local interfaces 1004 for (int index = 0; index < size; index++) { 1005 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); 1006 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 1007 } 1008 } else { 1009 // All arrays implement java.lang.Cloneable and java.io.Serializable 1010 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); 1011 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); 1012 } 1013 return (jobjectArray) JNIHandles::make_local(env, result()); 1014 JVM_END 1015 1016 1017 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1018 JVMWrapper("JVM_GetClassLoader"); 1019 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1020 return NULL; 1021 } 1022 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1023 oop loader = Klass::cast(k)->class_loader(); 1024 return JNIHandles::make_local(env, loader); 1025 JVM_END 1026 1027 1028 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1029 JVMWrapper("JVM_IsInterface"); 1030 oop mirror = JNIHandles::resolve_non_null(cls); 1031 if (java_lang_Class::is_primitive(mirror)) { 1032 return JNI_FALSE; 1033 } 1034 klassOop k = java_lang_Class::as_klassOop(mirror); 1035 jboolean result = Klass::cast(k)->is_interface(); 1036 assert(!result || Klass::cast(k)->oop_is_instance(), 1037 "all interfaces are instance types"); 1038 // The compiler intrinsic for isInterface tests the 1039 // Klass::_access_flags bits in the same way. 1040 return result; 1041 JVM_END 1042 1043 1044 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1045 JVMWrapper("JVM_GetClassSigners"); 1046 JvmtiVMObjectAllocEventCollector oam; 1047 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1048 // There are no signers for primitive types 1049 return NULL; 1050 } 1051 1052 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1053 objArrayOop signers = NULL; 1054 if (Klass::cast(k)->oop_is_instance()) { 1055 signers = instanceKlass::cast(k)->signers(); 1056 } 1057 1058 // If there are no signers set in the class, or if the class 1059 // is an array, return NULL. 1060 if (signers == NULL) return NULL; 1061 1062 // copy of the signers array 1063 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); 1064 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1065 for (int index = 0; index < signers->length(); index++) { 1066 signers_copy->obj_at_put(index, signers->obj_at(index)); 1067 } 1068 1069 // return the copy 1070 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1071 JVM_END 1072 1073 1074 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1075 JVMWrapper("JVM_SetClassSigners"); 1076 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1077 // This call is ignored for primitive types and arrays. 1078 // Signers are only set once, ClassLoader.java, and thus shouldn't 1079 // be called with an array. Only the bootstrap loader creates arrays. 1080 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1081 if (Klass::cast(k)->oop_is_instance()) { 1082 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1083 } 1084 } 1085 JVM_END 1086 1087 1088 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1089 JVMWrapper("JVM_GetProtectionDomain"); 1090 if (JNIHandles::resolve(cls) == NULL) { 1091 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1092 } 1093 1094 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1095 // Primitive types does not have a protection domain. 1096 return NULL; 1097 } 1098 1099 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1100 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 1101 JVM_END 1102 1103 1104 // Obsolete since 1.2 (Class.setProtectionDomain removed), although 1105 // still defined in core libraries as of 1.5. 1106 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1107 JVMWrapper("JVM_SetProtectionDomain"); 1108 if (JNIHandles::resolve(cls) == NULL) { 1109 THROW(vmSymbols::java_lang_NullPointerException()); 1110 } 1111 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1112 // Call is ignored for primitive types 1113 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1114 1115 // cls won't be an array, as this called only from ClassLoader.defineClass 1116 if (Klass::cast(k)->oop_is_instance()) { 1117 oop pd = JNIHandles::resolve(protection_domain); 1118 assert(pd == NULL || pd->is_oop(), "just checking"); 1119 instanceKlass::cast(k)->set_protection_domain(pd); 1120 } 1121 } 1122 JVM_END 1123 1124 1125 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1126 JVMWrapper("JVM_DoPrivileged"); 1127 1128 if (action == NULL) { 1129 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1130 } 1131 1132 // Stack allocated list of privileged stack elements 1133 PrivilegedElement pi; 1134 1135 // Check that action object understands "Object run()" 1136 Handle object (THREAD, JNIHandles::resolve(action)); 1137 1138 // get run() method 1139 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1140 vmSymbols::run_method_name(), 1141 vmSymbols::void_object_signature()); 1142 methodHandle m (THREAD, m_oop); 1143 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { 1144 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1145 } 1146 1147 // Compute the frame initiating the do privileged operation and setup the privileged stack 1148 vframeStream vfst(thread); 1149 vfst.security_get_caller_frame(1); 1150 1151 if (!vfst.at_end()) { 1152 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1153 thread->set_privileged_stack_top(&pi); 1154 } 1155 1156 1157 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1158 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1159 Handle pending_exception; 1160 JavaValue result(T_OBJECT); 1161 JavaCallArguments args(object); 1162 JavaCalls::call(&result, m, &args, THREAD); 1163 1164 // done with action, remove ourselves from the list 1165 if (!vfst.at_end()) { 1166 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1167 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1168 } 1169 1170 if (HAS_PENDING_EXCEPTION) { 1171 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1172 CLEAR_PENDING_EXCEPTION; 1173 1174 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1175 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1176 // Throw a java.security.PrivilegedActionException(Exception e) exception 1177 JavaCallArguments args(pending_exception); 1178 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1179 vmSymbols::exception_void_signature(), 1180 &args); 1181 } 1182 } 1183 1184 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1185 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1186 JVM_END 1187 1188 1189 // Returns the inherited_access_control_context field of the running thread. 1190 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1191 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1192 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1193 return JNIHandles::make_local(env, result); 1194 JVM_END 1195 1196 class RegisterArrayForGC { 1197 private: 1198 JavaThread *_thread; 1199 public: 1200 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1201 _thread = thread; 1202 _thread->register_array_for_gc(array); 1203 } 1204 1205 ~RegisterArrayForGC() { 1206 _thread->register_array_for_gc(NULL); 1207 } 1208 }; 1209 1210 1211 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1212 JVMWrapper("JVM_GetStackAccessControlContext"); 1213 if (!UsePrivilegedStack) return NULL; 1214 1215 ResourceMark rm(THREAD); 1216 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1217 JvmtiVMObjectAllocEventCollector oam; 1218 1219 // count the protection domains on the execution stack. We collapse 1220 // duplicate consecutive protection domains into a single one, as 1221 // well as stopping when we hit a privileged frame. 1222 1223 // Use vframeStream to iterate through Java frames 1224 vframeStream vfst(thread); 1225 1226 oop previous_protection_domain = NULL; 1227 Handle privileged_context(thread, NULL); 1228 bool is_privileged = false; 1229 oop protection_domain = NULL; 1230 1231 for(; !vfst.at_end(); vfst.next()) { 1232 // get method of frame 1233 methodOop method = vfst.method(); 1234 intptr_t* frame_id = vfst.frame_id(); 1235 1236 // check the privileged frames to see if we have a match 1237 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1238 // this frame is privileged 1239 is_privileged = true; 1240 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1241 protection_domain = thread->privileged_stack_top()->protection_domain(); 1242 } else { 1243 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 1244 } 1245 1246 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1247 local_array->push(protection_domain); 1248 previous_protection_domain = protection_domain; 1249 } 1250 1251 if (is_privileged) break; 1252 } 1253 1254 1255 // either all the domains on the stack were system domains, or 1256 // we had a privileged system domain 1257 if (local_array->is_empty()) { 1258 if (is_privileged && privileged_context.is_null()) return NULL; 1259 1260 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1261 return JNIHandles::make_local(env, result); 1262 } 1263 1264 // the resource area must be registered in case of a gc 1265 RegisterArrayForGC ragc(thread, local_array); 1266 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1267 local_array->length(), CHECK_NULL); 1268 objArrayHandle h_context(thread, context); 1269 for (int index = 0; index < local_array->length(); index++) { 1270 h_context->obj_at_put(index, local_array->at(index)); 1271 } 1272 1273 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1274 1275 return JNIHandles::make_local(env, result); 1276 JVM_END 1277 1278 1279 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1280 JVMWrapper("JVM_IsArrayClass"); 1281 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1282 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; 1283 JVM_END 1284 1285 1286 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1287 JVMWrapper("JVM_IsPrimitiveClass"); 1288 oop mirror = JNIHandles::resolve_non_null(cls); 1289 return (jboolean) java_lang_Class::is_primitive(mirror); 1290 JVM_END 1291 1292 1293 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1294 JVMWrapper("JVM_GetComponentType"); 1295 oop mirror = JNIHandles::resolve_non_null(cls); 1296 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1297 return (jclass) JNIHandles::make_local(env, result); 1298 JVM_END 1299 1300 1301 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1302 JVMWrapper("JVM_GetClassModifiers"); 1303 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1304 // Primitive type 1305 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1306 } 1307 1308 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1309 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1310 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1311 return k->modifier_flags(); 1312 JVM_END 1313 1314 1315 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1316 1317 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1318 JvmtiVMObjectAllocEventCollector oam; 1319 // ofClass is a reference to a java_lang_Class object. The mirror object 1320 // of an instanceKlass 1321 1322 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1323 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1324 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1325 return (jobjectArray)JNIHandles::make_local(env, result); 1326 } 1327 1328 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1329 InnerClassesIterator iter(k); 1330 1331 if (iter.length() == 0) { 1332 // Neither an inner nor outer class 1333 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1334 return (jobjectArray)JNIHandles::make_local(env, result); 1335 } 1336 1337 // find inner class info 1338 constantPoolHandle cp(thread, k->constants()); 1339 int length = iter.length(); 1340 1341 // Allocate temp. result array 1342 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1343 objArrayHandle result (THREAD, r); 1344 int members = 0; 1345 1346 for (; !iter.done(); iter.next()) { 1347 int ioff = iter.inner_class_info_index(); 1348 int ooff = iter.outer_class_info_index(); 1349 1350 if (ioff != 0 && ooff != 0) { 1351 // Check to see if the name matches the class we're looking for 1352 // before attempting to find the class. 1353 if (cp->klass_name_at_matches(k, ooff)) { 1354 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); 1355 if (outer_klass == k()) { 1356 klassOop ik = cp->klass_at(ioff, CHECK_NULL); 1357 instanceKlassHandle inner_klass (THREAD, ik); 1358 1359 // Throws an exception if outer klass has not declared k as 1360 // an inner klass 1361 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1362 1363 result->obj_at_put(members, inner_klass->java_mirror()); 1364 members++; 1365 } 1366 } 1367 } 1368 } 1369 1370 if (members != length) { 1371 // Return array of right length 1372 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1373 for(int i = 0; i < members; i++) { 1374 res->obj_at_put(i, result->obj_at(i)); 1375 } 1376 return (jobjectArray)JNIHandles::make_local(env, res); 1377 } 1378 1379 return (jobjectArray)JNIHandles::make_local(env, result()); 1380 JVM_END 1381 1382 1383 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1384 { 1385 // ofClass is a reference to a java_lang_Class object. 1386 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1387 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1388 return NULL; 1389 } 1390 1391 bool inner_is_member = false; 1392 klassOop outer_klass 1393 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) 1394 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1395 if (outer_klass == NULL) return NULL; // already a top-level class 1396 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1397 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); 1398 } 1399 JVM_END 1400 1401 // should be in instanceKlass.cpp, but is here for historical reasons 1402 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1403 bool* inner_is_member, 1404 TRAPS) { 1405 Thread* thread = THREAD; 1406 InnerClassesIterator iter(k); 1407 if (iter.length() == 0) { 1408 // No inner class info => no declaring class 1409 return NULL; 1410 } 1411 1412 constantPoolHandle i_cp(thread, k->constants()); 1413 1414 bool found = false; 1415 klassOop ok; 1416 instanceKlassHandle outer_klass; 1417 *inner_is_member = false; 1418 1419 // Find inner_klass attribute 1420 for (; !iter.done() && !found; iter.next()) { 1421 int ioff = iter.inner_class_info_index(); 1422 int ooff = iter.outer_class_info_index(); 1423 int noff = iter.inner_name_index(); 1424 if (ioff != 0) { 1425 // Check to see if the name matches the class we're looking for 1426 // before attempting to find the class. 1427 if (i_cp->klass_name_at_matches(k, ioff)) { 1428 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1429 found = (k() == inner_klass); 1430 if (found && ooff != 0) { 1431 ok = i_cp->klass_at(ooff, CHECK_NULL); 1432 outer_klass = instanceKlassHandle(thread, ok); 1433 *inner_is_member = true; 1434 } 1435 } 1436 } 1437 } 1438 1439 if (found && outer_klass.is_null()) { 1440 // It may be anonymous; try for that. 1441 int encl_method_class_idx = k->enclosing_method_class_index(); 1442 if (encl_method_class_idx != 0) { 1443 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1444 outer_klass = instanceKlassHandle(thread, ok); 1445 *inner_is_member = false; 1446 } 1447 } 1448 1449 // If no inner class attribute found for this class. 1450 if (outer_klass.is_null()) return NULL; 1451 1452 // Throws an exception if outer klass has not declared k as an inner klass 1453 // We need evidence that each klass knows about the other, or else 1454 // the system could allow a spoof of an inner class to gain access rights. 1455 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1456 return outer_klass(); 1457 } 1458 1459 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1460 assert (cls != NULL, "illegal class"); 1461 JVMWrapper("JVM_GetClassSignature"); 1462 JvmtiVMObjectAllocEventCollector oam; 1463 ResourceMark rm(THREAD); 1464 // Return null for arrays and primatives 1465 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1466 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1467 if (Klass::cast(k)->oop_is_instance()) { 1468 Symbol* sym = instanceKlass::cast(k)->generic_signature(); 1469 if (sym == NULL) return NULL; 1470 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1471 return (jstring) JNIHandles::make_local(env, str()); 1472 } 1473 } 1474 return NULL; 1475 JVM_END 1476 1477 1478 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1479 assert (cls != NULL, "illegal class"); 1480 JVMWrapper("JVM_GetClassAnnotations"); 1481 ResourceMark rm(THREAD); 1482 // Return null for arrays and primitives 1483 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1484 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1485 if (Klass::cast(k)->oop_is_instance()) { 1486 return (jbyteArray) JNIHandles::make_local(env, 1487 instanceKlass::cast(k)->class_annotations()); 1488 } 1489 } 1490 return NULL; 1491 JVM_END 1492 1493 1494 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1495 assert(field != NULL, "illegal field"); 1496 JVMWrapper("JVM_GetFieldAnnotations"); 1497 1498 // some of this code was adapted from from jni_FromReflectedField 1499 1500 // field is a handle to a java.lang.reflect.Field object 1501 oop reflected = JNIHandles::resolve_non_null(field); 1502 oop mirror = java_lang_reflect_Field::clazz(reflected); 1503 klassOop k = java_lang_Class::as_klassOop(mirror); 1504 int slot = java_lang_reflect_Field::slot(reflected); 1505 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1506 1507 fieldDescriptor fd; 1508 KlassHandle kh(THREAD, k); 1509 intptr_t offset = instanceKlass::cast(kh())->field_offset(slot); 1510 1511 if (modifiers & JVM_ACC_STATIC) { 1512 // for static fields we only look in the current class 1513 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, 1514 true, &fd)) { 1515 assert(false, "cannot find static field"); 1516 return NULL; // robustness 1517 } 1518 } else { 1519 // for instance fields we start with the current class and work 1520 // our way up through the superclass chain 1521 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, 1522 &fd)) { 1523 assert(false, "cannot find instance field"); 1524 return NULL; // robustness 1525 } 1526 } 1527 1528 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); 1529 JVM_END 1530 1531 1532 static methodOop jvm_get_method_common(jobject method, TRAPS) { 1533 // some of this code was adapted from from jni_FromReflectedMethod 1534 1535 oop reflected = JNIHandles::resolve_non_null(method); 1536 oop mirror = NULL; 1537 int slot = 0; 1538 1539 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1540 mirror = java_lang_reflect_Constructor::clazz(reflected); 1541 slot = java_lang_reflect_Constructor::slot(reflected); 1542 } else { 1543 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1544 "wrong type"); 1545 mirror = java_lang_reflect_Method::clazz(reflected); 1546 slot = java_lang_reflect_Method::slot(reflected); 1547 } 1548 klassOop k = java_lang_Class::as_klassOop(mirror); 1549 1550 KlassHandle kh(THREAD, k); 1551 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); 1552 if (m == NULL) { 1553 assert(false, "cannot find method"); 1554 return NULL; // robustness 1555 } 1556 1557 return m; 1558 } 1559 1560 1561 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1562 JVMWrapper("JVM_GetMethodAnnotations"); 1563 1564 // method is a handle to a java.lang.reflect.Method object 1565 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1566 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); 1567 JVM_END 1568 1569 1570 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1571 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1572 1573 // method is a handle to a java.lang.reflect.Method object 1574 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1575 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); 1576 JVM_END 1577 1578 1579 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1580 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1581 1582 // method is a handle to a java.lang.reflect.Method object 1583 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1584 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); 1585 JVM_END 1586 1587 1588 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1589 1590 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1591 { 1592 JVMWrapper("JVM_GetClassDeclaredFields"); 1593 JvmtiVMObjectAllocEventCollector oam; 1594 1595 // Exclude primitive types and array types 1596 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1597 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1598 // Return empty array 1599 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1600 return (jobjectArray) JNIHandles::make_local(env, res); 1601 } 1602 1603 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1604 constantPoolHandle cp(THREAD, k->constants()); 1605 1606 // Ensure class is linked 1607 k->link_class(CHECK_NULL); 1608 1609 // 4496456 We need to filter out java.lang.Throwable.backtrace 1610 bool skip_backtrace = false; 1611 1612 // Allocate result 1613 int num_fields; 1614 1615 if (publicOnly) { 1616 num_fields = 0; 1617 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1618 if (fs.access_flags().is_public()) ++num_fields; 1619 } 1620 } else { 1621 num_fields = k->java_fields_count(); 1622 1623 if (k() == SystemDictionary::Throwable_klass()) { 1624 num_fields--; 1625 skip_backtrace = true; 1626 } 1627 } 1628 1629 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1630 objArrayHandle result (THREAD, r); 1631 1632 int out_idx = 0; 1633 fieldDescriptor fd; 1634 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1635 if (skip_backtrace) { 1636 // 4496456 skip java.lang.Throwable.backtrace 1637 int offset = fs.offset(); 1638 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1639 } 1640 1641 if (!publicOnly || fs.access_flags().is_public()) { 1642 fd.initialize(k(), fs.index()); 1643 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1644 result->obj_at_put(out_idx, field); 1645 ++out_idx; 1646 } 1647 } 1648 assert(out_idx == num_fields, "just checking"); 1649 return (jobjectArray) JNIHandles::make_local(env, result()); 1650 } 1651 JVM_END 1652 1653 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1654 { 1655 JVMWrapper("JVM_GetClassDeclaredMethods"); 1656 JvmtiVMObjectAllocEventCollector oam; 1657 1658 // Exclude primitive types and array types 1659 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1660 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1661 // Return empty array 1662 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1663 return (jobjectArray) JNIHandles::make_local(env, res); 1664 } 1665 1666 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1667 1668 // Ensure class is linked 1669 k->link_class(CHECK_NULL); 1670 1671 objArrayHandle methods (THREAD, k->methods()); 1672 int methods_length = methods->length(); 1673 int num_methods = 0; 1674 1675 int i; 1676 for (i = 0; i < methods_length; i++) { 1677 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1678 if (!method->is_initializer()) { 1679 if (!publicOnly || method->is_public()) { 1680 ++num_methods; 1681 } 1682 } 1683 } 1684 1685 // Allocate result 1686 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1687 objArrayHandle result (THREAD, r); 1688 1689 int out_idx = 0; 1690 for (i = 0; i < methods_length; i++) { 1691 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1692 if (!method->is_initializer()) { 1693 if (!publicOnly || method->is_public()) { 1694 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1695 result->obj_at_put(out_idx, m); 1696 ++out_idx; 1697 } 1698 } 1699 } 1700 assert(out_idx == num_methods, "just checking"); 1701 return (jobjectArray) JNIHandles::make_local(env, result()); 1702 } 1703 JVM_END 1704 1705 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1706 { 1707 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1708 JvmtiVMObjectAllocEventCollector oam; 1709 1710 // Exclude primitive types and array types 1711 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1712 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1713 // Return empty array 1714 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1715 return (jobjectArray) JNIHandles::make_local(env, res); 1716 } 1717 1718 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1719 1720 // Ensure class is linked 1721 k->link_class(CHECK_NULL); 1722 1723 objArrayHandle methods (THREAD, k->methods()); 1724 int methods_length = methods->length(); 1725 int num_constructors = 0; 1726 1727 int i; 1728 for (i = 0; i < methods_length; i++) { 1729 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1730 if (method->is_initializer() && !method->is_static()) { 1731 if (!publicOnly || method->is_public()) { 1732 ++num_constructors; 1733 } 1734 } 1735 } 1736 1737 // Allocate result 1738 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1739 objArrayHandle result(THREAD, r); 1740 1741 int out_idx = 0; 1742 for (i = 0; i < methods_length; i++) { 1743 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1744 if (method->is_initializer() && !method->is_static()) { 1745 if (!publicOnly || method->is_public()) { 1746 oop m = Reflection::new_constructor(method, CHECK_NULL); 1747 result->obj_at_put(out_idx, m); 1748 ++out_idx; 1749 } 1750 } 1751 } 1752 assert(out_idx == num_constructors, "just checking"); 1753 return (jobjectArray) JNIHandles::make_local(env, result()); 1754 } 1755 JVM_END 1756 1757 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1758 { 1759 JVMWrapper("JVM_GetClassAccessFlags"); 1760 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1761 // Primitive type 1762 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1763 } 1764 1765 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1766 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1767 } 1768 JVM_END 1769 1770 1771 // Constant pool access ////////////////////////////////////////////////////////// 1772 1773 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1774 { 1775 JVMWrapper("JVM_GetClassConstantPool"); 1776 JvmtiVMObjectAllocEventCollector oam; 1777 1778 // Return null for primitives and arrays 1779 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1780 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1781 if (Klass::cast(k)->oop_is_instance()) { 1782 instanceKlassHandle k_h(THREAD, k); 1783 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1784 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); 1785 return JNIHandles::make_local(jcp()); 1786 } 1787 } 1788 return NULL; 1789 } 1790 JVM_END 1791 1792 1793 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) 1794 { 1795 JVMWrapper("JVM_ConstantPoolGetSize"); 1796 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1797 return cp->length(); 1798 } 1799 JVM_END 1800 1801 1802 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1803 if (!cp->is_within_bounds(index)) { 1804 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1805 } 1806 } 1807 1808 1809 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1810 { 1811 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1812 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1813 bounds_check(cp, index, CHECK_NULL); 1814 constantTag tag = cp->tag_at(index); 1815 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1816 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1817 } 1818 klassOop k = cp->klass_at(index, CHECK_NULL); 1819 return (jclass) JNIHandles::make_local(k->java_mirror()); 1820 } 1821 JVM_END 1822 1823 1824 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1825 { 1826 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1827 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1828 bounds_check(cp, index, CHECK_NULL); 1829 constantTag tag = cp->tag_at(index); 1830 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1831 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1832 } 1833 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); 1834 if (k == NULL) return NULL; 1835 return (jclass) JNIHandles::make_local(k->java_mirror()); 1836 } 1837 JVM_END 1838 1839 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1840 constantTag tag = cp->tag_at(index); 1841 if (!tag.is_method() && !tag.is_interface_method()) { 1842 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1843 } 1844 int klass_ref = cp->uncached_klass_ref_index_at(index); 1845 klassOop k_o; 1846 if (force_resolution) { 1847 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1848 } else { 1849 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1850 if (k_o == NULL) return NULL; 1851 } 1852 instanceKlassHandle k(THREAD, k_o); 1853 Symbol* name = cp->uncached_name_ref_at(index); 1854 Symbol* sig = cp->uncached_signature_ref_at(index); 1855 methodHandle m (THREAD, k->find_method(name, sig)); 1856 if (m.is_null()) { 1857 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1858 } 1859 oop method; 1860 if (!m->is_initializer() || m->is_static()) { 1861 method = Reflection::new_method(m, true, true, CHECK_NULL); 1862 } else { 1863 method = Reflection::new_constructor(m, CHECK_NULL); 1864 } 1865 return JNIHandles::make_local(method); 1866 } 1867 1868 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1869 { 1870 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1871 JvmtiVMObjectAllocEventCollector oam; 1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1873 bounds_check(cp, index, CHECK_NULL); 1874 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1875 return res; 1876 } 1877 JVM_END 1878 1879 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1880 { 1881 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1882 JvmtiVMObjectAllocEventCollector oam; 1883 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1884 bounds_check(cp, index, CHECK_NULL); 1885 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1886 return res; 1887 } 1888 JVM_END 1889 1890 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1891 constantTag tag = cp->tag_at(index); 1892 if (!tag.is_field()) { 1893 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1894 } 1895 int klass_ref = cp->uncached_klass_ref_index_at(index); 1896 klassOop k_o; 1897 if (force_resolution) { 1898 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1899 } else { 1900 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1901 if (k_o == NULL) return NULL; 1902 } 1903 instanceKlassHandle k(THREAD, k_o); 1904 Symbol* name = cp->uncached_name_ref_at(index); 1905 Symbol* sig = cp->uncached_signature_ref_at(index); 1906 fieldDescriptor fd; 1907 klassOop target_klass = k->find_field(name, sig, &fd); 1908 if (target_klass == NULL) { 1909 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1910 } 1911 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1912 return JNIHandles::make_local(field); 1913 } 1914 1915 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1916 { 1917 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1918 JvmtiVMObjectAllocEventCollector oam; 1919 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1920 bounds_check(cp, index, CHECK_NULL); 1921 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1922 return res; 1923 } 1924 JVM_END 1925 1926 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1927 { 1928 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1929 JvmtiVMObjectAllocEventCollector oam; 1930 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1931 bounds_check(cp, index, CHECK_NULL); 1932 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1933 return res; 1934 } 1935 JVM_END 1936 1937 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1938 { 1939 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1940 JvmtiVMObjectAllocEventCollector oam; 1941 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1942 bounds_check(cp, index, CHECK_NULL); 1943 constantTag tag = cp->tag_at(index); 1944 if (!tag.is_field_or_method()) { 1945 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1946 } 1947 int klass_ref = cp->uncached_klass_ref_index_at(index); 1948 Symbol* klass_name = cp->klass_name_at(klass_ref); 1949 Symbol* member_name = cp->uncached_name_ref_at(index); 1950 Symbol* member_sig = cp->uncached_signature_ref_at(index); 1951 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 1952 objArrayHandle dest(THREAD, dest_o); 1953 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1954 dest->obj_at_put(0, str()); 1955 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1956 dest->obj_at_put(1, str()); 1957 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1958 dest->obj_at_put(2, str()); 1959 return (jobjectArray) JNIHandles::make_local(dest()); 1960 } 1961 JVM_END 1962 1963 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1964 { 1965 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1966 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1967 bounds_check(cp, index, CHECK_0); 1968 constantTag tag = cp->tag_at(index); 1969 if (!tag.is_int()) { 1970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1971 } 1972 return cp->int_at(index); 1973 } 1974 JVM_END 1975 1976 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1977 { 1978 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1979 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1980 bounds_check(cp, index, CHECK_(0L)); 1981 constantTag tag = cp->tag_at(index); 1982 if (!tag.is_long()) { 1983 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1984 } 1985 return cp->long_at(index); 1986 } 1987 JVM_END 1988 1989 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1990 { 1991 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1992 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1993 bounds_check(cp, index, CHECK_(0.0f)); 1994 constantTag tag = cp->tag_at(index); 1995 if (!tag.is_float()) { 1996 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1997 } 1998 return cp->float_at(index); 1999 } 2000 JVM_END 2001 2002 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 2003 { 2004 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2005 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 2006 bounds_check(cp, index, CHECK_(0.0)); 2007 constantTag tag = cp->tag_at(index); 2008 if (!tag.is_double()) { 2009 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2010 } 2011 return cp->double_at(index); 2012 } 2013 JVM_END 2014 2015 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 2016 { 2017 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2018 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 2019 bounds_check(cp, index, CHECK_NULL); 2020 constantTag tag = cp->tag_at(index); 2021 if (!tag.is_string() && !tag.is_unresolved_string()) { 2022 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2023 } 2024 oop str = cp->string_at(index, CHECK_NULL); 2025 return (jstring) JNIHandles::make_local(str); 2026 } 2027 JVM_END 2028 2029 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 2030 { 2031 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2032 JvmtiVMObjectAllocEventCollector oam; 2033 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 2034 bounds_check(cp, index, CHECK_NULL); 2035 constantTag tag = cp->tag_at(index); 2036 if (!tag.is_symbol()) { 2037 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2038 } 2039 Symbol* sym = cp->symbol_at(index); 2040 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2041 return (jstring) JNIHandles::make_local(str()); 2042 } 2043 JVM_END 2044 2045 2046 // Assertion support. ////////////////////////////////////////////////////////// 2047 2048 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2049 JVMWrapper("JVM_DesiredAssertionStatus"); 2050 assert(cls != NULL, "bad class"); 2051 2052 oop r = JNIHandles::resolve(cls); 2053 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2054 if (java_lang_Class::is_primitive(r)) return false; 2055 2056 klassOop k = java_lang_Class::as_klassOop(r); 2057 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 2058 if (! Klass::cast(k)->oop_is_instance()) return false; 2059 2060 ResourceMark rm(THREAD); 2061 const char* name = Klass::cast(k)->name()->as_C_string(); 2062 bool system_class = Klass::cast(k)->class_loader() == NULL; 2063 return JavaAssertions::enabled(name, system_class); 2064 2065 JVM_END 2066 2067 2068 // Return a new AssertionStatusDirectives object with the fields filled in with 2069 // command-line assertion arguments (i.e., -ea, -da). 2070 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2071 JVMWrapper("JVM_AssertionStatusDirectives"); 2072 JvmtiVMObjectAllocEventCollector oam; 2073 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2074 return JNIHandles::make_local(env, asd); 2075 JVM_END 2076 2077 // Verification //////////////////////////////////////////////////////////////////////////////// 2078 2079 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2080 2081 // RedefineClasses support: bug 6214132 caused verification to fail. 2082 // All functions from this section should call the jvmtiThreadSate function: 2083 // klassOop class_to_verify_considering_redefinition(klassOop klass). 2084 // The function returns a klassOop of the _scratch_class if the verifier 2085 // was invoked in the middle of the class redefinition. 2086 // Otherwise it returns its argument value which is the _the_class klassOop. 2087 // Please, refer to the description in the jvmtiThreadSate.hpp. 2088 2089 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2090 JVMWrapper("JVM_GetClassNameUTF"); 2091 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2092 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2093 return Klass::cast(k)->name()->as_utf8(); 2094 JVM_END 2095 2096 2097 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2098 JVMWrapper("JVM_GetClassCPTypes"); 2099 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2100 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2101 // types will have length zero if this is not an instanceKlass 2102 // (length is determined by call to JVM_GetClassCPEntriesCount) 2103 if (Klass::cast(k)->oop_is_instance()) { 2104 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2105 for (int index = cp->length() - 1; index >= 0; index--) { 2106 constantTag tag = cp->tag_at(index); 2107 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : 2108 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); 2109 } 2110 } 2111 JVM_END 2112 2113 2114 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2115 JVMWrapper("JVM_GetClassCPEntriesCount"); 2116 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2117 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2118 if (!Klass::cast(k)->oop_is_instance()) 2119 return 0; 2120 return instanceKlass::cast(k)->constants()->length(); 2121 JVM_END 2122 2123 2124 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2125 JVMWrapper("JVM_GetClassFieldsCount"); 2126 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2127 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2128 if (!Klass::cast(k)->oop_is_instance()) 2129 return 0; 2130 return instanceKlass::cast(k)->java_fields_count(); 2131 JVM_END 2132 2133 2134 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2135 JVMWrapper("JVM_GetClassMethodsCount"); 2136 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2137 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2138 if (!Klass::cast(k)->oop_is_instance()) 2139 return 0; 2140 return instanceKlass::cast(k)->methods()->length(); 2141 JVM_END 2142 2143 2144 // The following methods, used for the verifier, are never called with 2145 // array klasses, so a direct cast to instanceKlass is safe. 2146 // Typically, these methods are called in a loop with bounds determined 2147 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2148 // zero for arrays. 2149 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2150 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2151 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2152 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2153 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2154 int length = methodOop(method)->checked_exceptions_length(); 2155 if (length > 0) { 2156 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); 2157 for (int i = 0; i < length; i++) { 2158 exceptions[i] = table[i].class_cp_index; 2159 } 2160 } 2161 JVM_END 2162 2163 2164 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2165 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2168 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2169 return methodOop(method)->checked_exceptions_length(); 2170 JVM_END 2171 2172 2173 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2174 JVMWrapper("JVM_GetMethodIxByteCode"); 2175 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2176 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2177 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2178 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); 2179 JVM_END 2180 2181 2182 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2183 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2184 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2185 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2186 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2187 return methodOop(method)->code_size(); 2188 JVM_END 2189 2190 2191 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2192 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2193 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2194 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2195 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2196 typeArrayOop extable = methodOop(method)->exception_table(); 2197 entry->start_pc = extable->int_at(entry_index * 4); 2198 entry->end_pc = extable->int_at(entry_index * 4 + 1); 2199 entry->handler_pc = extable->int_at(entry_index * 4 + 2); 2200 entry->catchType = extable->int_at(entry_index * 4 + 3); 2201 JVM_END 2202 2203 2204 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2205 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2206 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2207 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2208 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2209 return methodOop(method)->exception_table()->length() / 4; 2210 JVM_END 2211 2212 2213 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2214 JVMWrapper("JVM_GetMethodIxModifiers"); 2215 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2216 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2217 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2218 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2219 JVM_END 2220 2221 2222 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2223 JVMWrapper("JVM_GetFieldIxModifiers"); 2224 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2225 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2226 return instanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2227 JVM_END 2228 2229 2230 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2231 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2232 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2233 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2234 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2235 return methodOop(method)->max_locals(); 2236 JVM_END 2237 2238 2239 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2240 JVMWrapper("JVM_GetMethodIxArgsSize"); 2241 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2242 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2243 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2244 return methodOop(method)->size_of_parameters(); 2245 JVM_END 2246 2247 2248 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2249 JVMWrapper("JVM_GetMethodIxMaxStack"); 2250 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2251 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2252 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2253 return methodOop(method)->max_stack(); 2254 JVM_END 2255 2256 2257 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2258 JVMWrapper("JVM_IsConstructorIx"); 2259 ResourceMark rm(THREAD); 2260 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2261 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2262 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2263 return methodOop(method)->name() == vmSymbols::object_initializer_name(); 2264 JVM_END 2265 2266 2267 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2268 JVMWrapper("JVM_GetMethodIxIxUTF"); 2269 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2270 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2271 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2272 return methodOop(method)->name()->as_utf8(); 2273 JVM_END 2274 2275 2276 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2277 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2278 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2279 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2280 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2281 return methodOop(method)->signature()->as_utf8(); 2282 JVM_END 2283 2284 /** 2285 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2286 * read entries in the constant pool. Since the old verifier always 2287 * works on a copy of the code, it will not see any rewriting that 2288 * may possibly occur in the middle of verification. So it is important 2289 * that nothing it calls tries to use the cpCache instead of the raw 2290 * constant pool, so we must use cp->uncached_x methods when appropriate. 2291 */ 2292 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2293 JVMWrapper("JVM_GetCPFieldNameUTF"); 2294 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2296 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2297 switch (cp->tag_at(cp_index).value()) { 2298 case JVM_CONSTANT_Fieldref: 2299 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2300 default: 2301 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2302 } 2303 ShouldNotReachHere(); 2304 return NULL; 2305 JVM_END 2306 2307 2308 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2309 JVMWrapper("JVM_GetCPMethodNameUTF"); 2310 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2311 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2312 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2313 switch (cp->tag_at(cp_index).value()) { 2314 case JVM_CONSTANT_InterfaceMethodref: 2315 case JVM_CONSTANT_Methodref: 2316 case JVM_CONSTANT_NameAndType: // for invokedynamic 2317 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2318 default: 2319 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2320 } 2321 ShouldNotReachHere(); 2322 return NULL; 2323 JVM_END 2324 2325 2326 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2327 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2328 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2330 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2331 switch (cp->tag_at(cp_index).value()) { 2332 case JVM_CONSTANT_InterfaceMethodref: 2333 case JVM_CONSTANT_Methodref: 2334 case JVM_CONSTANT_NameAndType: // for invokedynamic 2335 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2336 default: 2337 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2338 } 2339 ShouldNotReachHere(); 2340 return NULL; 2341 JVM_END 2342 2343 2344 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2345 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2346 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2347 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2348 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2349 switch (cp->tag_at(cp_index).value()) { 2350 case JVM_CONSTANT_Fieldref: 2351 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2352 default: 2353 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2354 } 2355 ShouldNotReachHere(); 2356 return NULL; 2357 JVM_END 2358 2359 2360 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2361 JVMWrapper("JVM_GetCPClassNameUTF"); 2362 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2364 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2365 Symbol* classname = cp->klass_name_at(cp_index); 2366 return classname->as_utf8(); 2367 JVM_END 2368 2369 2370 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2371 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2372 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2373 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2374 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2375 switch (cp->tag_at(cp_index).value()) { 2376 case JVM_CONSTANT_Fieldref: { 2377 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2378 Symbol* classname = cp->klass_name_at(class_index); 2379 return classname->as_utf8(); 2380 } 2381 default: 2382 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2383 } 2384 ShouldNotReachHere(); 2385 return NULL; 2386 JVM_END 2387 2388 2389 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2390 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2391 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2392 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2393 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2394 switch (cp->tag_at(cp_index).value()) { 2395 case JVM_CONSTANT_Methodref: 2396 case JVM_CONSTANT_InterfaceMethodref: { 2397 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2398 Symbol* classname = cp->klass_name_at(class_index); 2399 return classname->as_utf8(); 2400 } 2401 default: 2402 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2403 } 2404 ShouldNotReachHere(); 2405 return NULL; 2406 JVM_END 2407 2408 2409 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2410 JVMWrapper("JVM_GetCPFieldModifiers"); 2411 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2412 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2413 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2414 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2415 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2416 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); 2417 switch (cp->tag_at(cp_index).value()) { 2418 case JVM_CONSTANT_Fieldref: { 2419 Symbol* name = cp->uncached_name_ref_at(cp_index); 2420 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2421 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2422 if (fs.name() == name && fs.signature() == signature) { 2423 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2424 } 2425 } 2426 return -1; 2427 } 2428 default: 2429 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2430 } 2431 ShouldNotReachHere(); 2432 return 0; 2433 JVM_END 2434 2435 2436 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2437 JVMWrapper("JVM_GetCPMethodModifiers"); 2438 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2439 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2441 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2442 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2443 switch (cp->tag_at(cp_index).value()) { 2444 case JVM_CONSTANT_Methodref: 2445 case JVM_CONSTANT_InterfaceMethodref: { 2446 Symbol* name = cp->uncached_name_ref_at(cp_index); 2447 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2448 objArrayOop methods = instanceKlass::cast(k_called)->methods(); 2449 int methods_count = methods->length(); 2450 for (int i = 0; i < methods_count; i++) { 2451 methodOop method = methodOop(methods->obj_at(i)); 2452 if (method->name() == name && method->signature() == signature) { 2453 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2454 } 2455 } 2456 return -1; 2457 } 2458 default: 2459 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2460 } 2461 ShouldNotReachHere(); 2462 return 0; 2463 JVM_END 2464 2465 2466 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2467 2468 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2469 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2470 JVM_END 2471 2472 2473 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2474 JVMWrapper("JVM_IsSameClassPackage"); 2475 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2476 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2477 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); 2478 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); 2479 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2480 JVM_END 2481 2482 2483 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2484 2485 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2486 JVMWrapper2("JVM_Open (%s)", fname); 2487 2488 //%note jvm_r6 2489 int result = os::open(fname, flags, mode); 2490 if (result >= 0) { 2491 return result; 2492 } else { 2493 switch(errno) { 2494 case EEXIST: 2495 return JVM_EEXIST; 2496 default: 2497 return -1; 2498 } 2499 } 2500 JVM_END 2501 2502 2503 JVM_LEAF(jint, JVM_Close(jint fd)) 2504 JVMWrapper2("JVM_Close (0x%x)", fd); 2505 //%note jvm_r6 2506 return os::close(fd); 2507 JVM_END 2508 2509 2510 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2511 JVMWrapper2("JVM_Read (0x%x)", fd); 2512 2513 //%note jvm_r6 2514 return (jint)os::restartable_read(fd, buf, nbytes); 2515 JVM_END 2516 2517 2518 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2519 JVMWrapper2("JVM_Write (0x%x)", fd); 2520 2521 //%note jvm_r6 2522 return (jint)os::write(fd, buf, nbytes); 2523 JVM_END 2524 2525 2526 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2527 JVMWrapper2("JVM_Available (0x%x)", fd); 2528 //%note jvm_r6 2529 return os::available(fd, pbytes); 2530 JVM_END 2531 2532 2533 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2534 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2535 //%note jvm_r6 2536 return os::lseek(fd, offset, whence); 2537 JVM_END 2538 2539 2540 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2541 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2542 return os::ftruncate(fd, length); 2543 JVM_END 2544 2545 2546 JVM_LEAF(jint, JVM_Sync(jint fd)) 2547 JVMWrapper2("JVM_Sync (0x%x)", fd); 2548 //%note jvm_r6 2549 return os::fsync(fd); 2550 JVM_END 2551 2552 2553 // Printing support ////////////////////////////////////////////////// 2554 extern "C" { 2555 2556 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2557 // see bug 4399518, 4417214 2558 if ((intptr_t)count <= 0) return -1; 2559 return vsnprintf(str, count, fmt, args); 2560 } 2561 2562 2563 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2564 va_list args; 2565 int len; 2566 va_start(args, fmt); 2567 len = jio_vsnprintf(str, count, fmt, args); 2568 va_end(args); 2569 return len; 2570 } 2571 2572 2573 int jio_fprintf(FILE* f, const char *fmt, ...) { 2574 int len; 2575 va_list args; 2576 va_start(args, fmt); 2577 len = jio_vfprintf(f, fmt, args); 2578 va_end(args); 2579 return len; 2580 } 2581 2582 2583 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2584 if (Arguments::vfprintf_hook() != NULL) { 2585 return Arguments::vfprintf_hook()(f, fmt, args); 2586 } else { 2587 return vfprintf(f, fmt, args); 2588 } 2589 } 2590 2591 2592 JNIEXPORT int jio_printf(const char *fmt, ...) { 2593 int len; 2594 va_list args; 2595 va_start(args, fmt); 2596 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2597 va_end(args); 2598 return len; 2599 } 2600 2601 2602 // HotSpot specific jio method 2603 void jio_print(const char* s) { 2604 // Try to make this function as atomic as possible. 2605 if (Arguments::vfprintf_hook() != NULL) { 2606 jio_fprintf(defaultStream::output_stream(), "%s", s); 2607 } else { 2608 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2609 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2610 } 2611 } 2612 2613 } // Extern C 2614 2615 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2616 2617 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2618 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2619 // OSThread objects. The exception to this rule is when the target object is the thread 2620 // doing the operation, in which case we know that the thread won't exit until the 2621 // operation is done (all exits being voluntary). There are a few cases where it is 2622 // rather silly to do operations on yourself, like resuming yourself or asking whether 2623 // you are alive. While these can still happen, they are not subject to deadlocks if 2624 // the lock is held while the operation occurs (this is not the case for suspend, for 2625 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2626 // implementation is local to this file, we always lock Threads_lock for that one. 2627 2628 static void thread_entry(JavaThread* thread, TRAPS) { 2629 HandleMark hm(THREAD); 2630 Handle obj(THREAD, thread->threadObj()); 2631 JavaValue result(T_VOID); 2632 JavaCalls::call_virtual(&result, 2633 obj, 2634 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2635 vmSymbols::run_method_name(), 2636 vmSymbols::void_method_signature(), 2637 THREAD); 2638 } 2639 2640 2641 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2642 JVMWrapper("JVM_StartThread"); 2643 JavaThread *native_thread = NULL; 2644 2645 // We cannot hold the Threads_lock when we throw an exception, 2646 // due to rank ordering issues. Example: we might need to grab the 2647 // Heap_lock while we construct the exception. 2648 bool throw_illegal_thread_state = false; 2649 2650 // We must release the Threads_lock before we can post a jvmti event 2651 // in Thread::start. 2652 { 2653 // Ensure that the C++ Thread and OSThread structures aren't freed before 2654 // we operate. 2655 MutexLocker mu(Threads_lock); 2656 2657 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2658 // re-starting an already started thread, so we should usually find 2659 // that the JavaThread is null. However for a JNI attached thread 2660 // there is a small window between the Thread object being created 2661 // (with its JavaThread set) and the update to its threadStatus, so we 2662 // have to check for this 2663 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2664 throw_illegal_thread_state = true; 2665 } else { 2666 // We could also check the stillborn flag to see if this thread was already stopped, but 2667 // for historical reasons we let the thread detect that itself when it starts running 2668 2669 jlong size = 2670 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2671 // Allocate the C++ Thread structure and create the native thread. The 2672 // stack size retrieved from java is signed, but the constructor takes 2673 // size_t (an unsigned type), so avoid passing negative values which would 2674 // result in really large stacks. 2675 size_t sz = size > 0 ? (size_t) size : 0; 2676 native_thread = new JavaThread(&thread_entry, sz); 2677 2678 // At this point it may be possible that no osthread was created for the 2679 // JavaThread due to lack of memory. Check for this situation and throw 2680 // an exception if necessary. Eventually we may want to change this so 2681 // that we only grab the lock if the thread was created successfully - 2682 // then we can also do this check and throw the exception in the 2683 // JavaThread constructor. 2684 if (native_thread->osthread() != NULL) { 2685 // Note: the current thread is not being used within "prepare". 2686 native_thread->prepare(jthread); 2687 } 2688 } 2689 } 2690 2691 if (throw_illegal_thread_state) { 2692 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2693 } 2694 2695 assert(native_thread != NULL, "Starting null thread?"); 2696 2697 if (native_thread->osthread() == NULL) { 2698 // No one should hold a reference to the 'native_thread'. 2699 delete native_thread; 2700 if (JvmtiExport::should_post_resource_exhausted()) { 2701 JvmtiExport::post_resource_exhausted( 2702 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2703 "unable to create new native thread"); 2704 } 2705 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2706 "unable to create new native thread"); 2707 } 2708 2709 Thread::start(native_thread); 2710 2711 JVM_END 2712 2713 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2714 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2715 // but is thought to be reliable and simple. In the case, where the receiver is the 2716 // same thread as the sender, no safepoint is needed. 2717 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2718 JVMWrapper("JVM_StopThread"); 2719 2720 oop java_throwable = JNIHandles::resolve(throwable); 2721 if (java_throwable == NULL) { 2722 THROW(vmSymbols::java_lang_NullPointerException()); 2723 } 2724 oop java_thread = JNIHandles::resolve_non_null(jthread); 2725 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2726 Events::log_exception(JavaThread::current(), 2727 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2728 receiver, (address)java_thread, throwable); 2729 // First check if thread is alive 2730 if (receiver != NULL) { 2731 // Check if exception is getting thrown at self (use oop equality, since the 2732 // target object might exit) 2733 if (java_thread == thread->threadObj()) { 2734 THROW_OOP(java_throwable); 2735 } else { 2736 // Enques a VM_Operation to stop all threads and then deliver the exception... 2737 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2738 } 2739 } 2740 else { 2741 // Either: 2742 // - target thread has not been started before being stopped, or 2743 // - target thread already terminated 2744 // We could read the threadStatus to determine which case it is 2745 // but that is overkill as it doesn't matter. We must set the 2746 // stillborn flag for the first case, and if the thread has already 2747 // exited setting this flag has no affect 2748 java_lang_Thread::set_stillborn(java_thread); 2749 } 2750 JVM_END 2751 2752 2753 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2754 JVMWrapper("JVM_IsThreadAlive"); 2755 2756 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2757 return java_lang_Thread::is_alive(thread_oop); 2758 JVM_END 2759 2760 2761 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2762 JVMWrapper("JVM_SuspendThread"); 2763 oop java_thread = JNIHandles::resolve_non_null(jthread); 2764 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2765 2766 if (receiver != NULL) { 2767 // thread has run and has not exited (still on threads list) 2768 2769 { 2770 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2771 if (receiver->is_external_suspend()) { 2772 // Don't allow nested external suspend requests. We can't return 2773 // an error from this interface so just ignore the problem. 2774 return; 2775 } 2776 if (receiver->is_exiting()) { // thread is in the process of exiting 2777 return; 2778 } 2779 receiver->set_external_suspend(); 2780 } 2781 2782 // java_suspend() will catch threads in the process of exiting 2783 // and will ignore them. 2784 receiver->java_suspend(); 2785 2786 // It would be nice to have the following assertion in all the 2787 // time, but it is possible for a racing resume request to have 2788 // resumed this thread right after we suspended it. Temporarily 2789 // enable this assertion if you are chasing a different kind of 2790 // bug. 2791 // 2792 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2793 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2794 } 2795 JVM_END 2796 2797 2798 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2799 JVMWrapper("JVM_ResumeThread"); 2800 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2801 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2802 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2803 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2804 // looks at it. 2805 MutexLocker ml(Threads_lock); 2806 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2807 if (thr != NULL) { 2808 // the thread has run and is not in the process of exiting 2809 thr->java_resume(); 2810 } 2811 JVM_END 2812 2813 2814 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2815 JVMWrapper("JVM_SetThreadPriority"); 2816 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2817 MutexLocker ml(Threads_lock); 2818 oop java_thread = JNIHandles::resolve_non_null(jthread); 2819 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2820 JavaThread* thr = java_lang_Thread::thread(java_thread); 2821 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2822 Thread::set_priority(thr, (ThreadPriority)prio); 2823 } 2824 JVM_END 2825 2826 2827 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2828 JVMWrapper("JVM_Yield"); 2829 if (os::dont_yield()) return; 2830 #ifndef USDT2 2831 HS_DTRACE_PROBE0(hotspot, thread__yield); 2832 #else /* USDT2 */ 2833 HOTSPOT_THREAD_YIELD(); 2834 #endif /* USDT2 */ 2835 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2836 // Critical for similar threading behaviour 2837 if (ConvertYieldToSleep) { 2838 os::sleep(thread, MinSleepInterval, false); 2839 } else { 2840 os::yield(); 2841 } 2842 JVM_END 2843 2844 2845 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2846 JVMWrapper("JVM_Sleep"); 2847 2848 if (millis < 0) { 2849 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2850 } 2851 2852 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2853 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2854 } 2855 2856 // Save current thread state and restore it at the end of this block. 2857 // And set new thread state to SLEEPING. 2858 JavaThreadSleepState jtss(thread); 2859 2860 #ifndef USDT2 2861 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 2862 #else /* USDT2 */ 2863 HOTSPOT_THREAD_SLEEP_BEGIN( 2864 millis); 2865 #endif /* USDT2 */ 2866 2867 if (millis == 0) { 2868 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2869 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2870 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2871 // for SOLARIS 2872 if (ConvertSleepToYield) { 2873 os::yield(); 2874 } else { 2875 ThreadState old_state = thread->osthread()->get_state(); 2876 thread->osthread()->set_state(SLEEPING); 2877 os::sleep(thread, MinSleepInterval, false); 2878 thread->osthread()->set_state(old_state); 2879 } 2880 } else { 2881 ThreadState old_state = thread->osthread()->get_state(); 2882 thread->osthread()->set_state(SLEEPING); 2883 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2884 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2885 // us while we were sleeping. We do not overwrite those. 2886 if (!HAS_PENDING_EXCEPTION) { 2887 #ifndef USDT2 2888 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 2889 #else /* USDT2 */ 2890 HOTSPOT_THREAD_SLEEP_END( 2891 1); 2892 #endif /* USDT2 */ 2893 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2894 // to properly restore the thread state. That's likely wrong. 2895 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2896 } 2897 } 2898 thread->osthread()->set_state(old_state); 2899 } 2900 #ifndef USDT2 2901 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 2902 #else /* USDT2 */ 2903 HOTSPOT_THREAD_SLEEP_END( 2904 0); 2905 #endif /* USDT2 */ 2906 JVM_END 2907 2908 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2909 JVMWrapper("JVM_CurrentThread"); 2910 oop jthread = thread->threadObj(); 2911 assert (thread != NULL, "no current thread!"); 2912 return JNIHandles::make_local(env, jthread); 2913 JVM_END 2914 2915 2916 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2917 JVMWrapper("JVM_CountStackFrames"); 2918 2919 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2920 oop java_thread = JNIHandles::resolve_non_null(jthread); 2921 bool throw_illegal_thread_state = false; 2922 int count = 0; 2923 2924 { 2925 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2926 // We need to re-resolve the java_thread, since a GC might have happened during the 2927 // acquire of the lock 2928 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2929 2930 if (thr == NULL) { 2931 // do nothing 2932 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2933 // Check whether this java thread has been suspended already. If not, throws 2934 // IllegalThreadStateException. We defer to throw that exception until 2935 // Threads_lock is released since loading exception class has to leave VM. 2936 // The correct way to test a thread is actually suspended is 2937 // wait_for_ext_suspend_completion(), but we can't call that while holding 2938 // the Threads_lock. The above tests are sufficient for our purposes 2939 // provided the walkability of the stack is stable - which it isn't 2940 // 100% but close enough for most practical purposes. 2941 throw_illegal_thread_state = true; 2942 } else { 2943 // Count all java activation, i.e., number of vframes 2944 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2945 // Native frames are not counted 2946 if (!vfst.method()->is_native()) count++; 2947 } 2948 } 2949 } 2950 2951 if (throw_illegal_thread_state) { 2952 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2953 "this thread is not suspended"); 2954 } 2955 return count; 2956 JVM_END 2957 2958 // Consider: A better way to implement JVM_Interrupt() is to acquire 2959 // Threads_lock to resolve the jthread into a Thread pointer, fetch 2960 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2961 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 2962 // outside the critical section. Threads_lock is hot so we want to minimize 2963 // the hold-time. A cleaner interface would be to decompose interrupt into 2964 // two steps. The 1st phase, performed under Threads_lock, would return 2965 // a closure that'd be invoked after Threads_lock was dropped. 2966 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2967 // admit spurious wakeups. 2968 2969 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2970 JVMWrapper("JVM_Interrupt"); 2971 2972 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2973 oop java_thread = JNIHandles::resolve_non_null(jthread); 2974 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2975 // We need to re-resolve the java_thread, since a GC might have happened during the 2976 // acquire of the lock 2977 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2978 if (thr != NULL) { 2979 Thread::interrupt(thr); 2980 } 2981 JVM_END 2982 2983 2984 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2985 JVMWrapper("JVM_IsInterrupted"); 2986 2987 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2988 oop java_thread = JNIHandles::resolve_non_null(jthread); 2989 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2990 // We need to re-resolve the java_thread, since a GC might have happened during the 2991 // acquire of the lock 2992 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2993 if (thr == NULL) { 2994 return JNI_FALSE; 2995 } else { 2996 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2997 } 2998 JVM_END 2999 3000 3001 // Return true iff the current thread has locked the object passed in 3002 3003 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3004 JVMWrapper("JVM_HoldsLock"); 3005 assert(THREAD->is_Java_thread(), "sanity check"); 3006 if (obj == NULL) { 3007 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3008 } 3009 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3010 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3011 JVM_END 3012 3013 3014 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3015 JVMWrapper("JVM_DumpAllStacks"); 3016 VM_PrintThreads op; 3017 VMThread::execute(&op); 3018 if (JvmtiExport::should_post_data_dump()) { 3019 JvmtiExport::post_data_dump(); 3020 } 3021 JVM_END 3022 3023 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3024 JVMWrapper("JVM_SetNativeThreadName"); 3025 ResourceMark rm(THREAD); 3026 oop java_thread = JNIHandles::resolve_non_null(jthread); 3027 JavaThread* thr = java_lang_Thread::thread(java_thread); 3028 // Thread naming only supported for the current thread, doesn't work for 3029 // target threads. 3030 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3031 // we don't set the name of an attached thread to avoid stepping 3032 // on other programs 3033 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3034 os::set_native_thread_name(thread_name); 3035 } 3036 JVM_END 3037 3038 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3039 3040 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3041 assert(jthread->is_Java_thread(), "must be a Java thread"); 3042 if (jthread->privileged_stack_top() == NULL) return false; 3043 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3044 oop loader = jthread->privileged_stack_top()->class_loader(); 3045 if (loader == NULL) return true; 3046 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3047 if (trusted) return true; 3048 } 3049 return false; 3050 } 3051 3052 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3053 JVMWrapper("JVM_CurrentLoadedClass"); 3054 ResourceMark rm(THREAD); 3055 3056 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3057 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3058 bool trusted = is_trusted_frame(thread, &vfst); 3059 if (trusted) return NULL; 3060 3061 methodOop m = vfst.method(); 3062 if (!m->is_native()) { 3063 klassOop holder = m->method_holder(); 3064 oop loader = instanceKlass::cast(holder)->class_loader(); 3065 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3066 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 3067 } 3068 } 3069 } 3070 return NULL; 3071 JVM_END 3072 3073 3074 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3075 JVMWrapper("JVM_CurrentClassLoader"); 3076 ResourceMark rm(THREAD); 3077 3078 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3079 3080 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3081 bool trusted = is_trusted_frame(thread, &vfst); 3082 if (trusted) return NULL; 3083 3084 methodOop m = vfst.method(); 3085 if (!m->is_native()) { 3086 klassOop holder = m->method_holder(); 3087 assert(holder->is_klass(), "just checking"); 3088 oop loader = instanceKlass::cast(holder)->class_loader(); 3089 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3090 return JNIHandles::make_local(env, loader); 3091 } 3092 } 3093 } 3094 return NULL; 3095 JVM_END 3096 3097 3098 // Utility object for collecting method holders walking down the stack 3099 class KlassLink: public ResourceObj { 3100 public: 3101 KlassHandle klass; 3102 KlassLink* next; 3103 3104 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3105 }; 3106 3107 3108 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3109 JVMWrapper("JVM_GetClassContext"); 3110 ResourceMark rm(THREAD); 3111 JvmtiVMObjectAllocEventCollector oam; 3112 // Collect linked list of (handles to) method holders 3113 KlassLink* first = NULL; 3114 KlassLink* last = NULL; 3115 int depth = 0; 3116 3117 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 3118 // Native frames are not returned 3119 if (!vfst.method()->is_native()) { 3120 klassOop holder = vfst.method()->method_holder(); 3121 assert(holder->is_klass(), "just checking"); 3122 depth++; 3123 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3124 if (first == NULL) { 3125 first = last = l; 3126 } else { 3127 last->next = l; 3128 last = l; 3129 } 3130 } 3131 } 3132 3133 // Create result array of type [Ljava/lang/Class; 3134 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3135 // Fill in mirrors corresponding to method holders 3136 int index = 0; 3137 while (first != NULL) { 3138 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 3139 first = first->next; 3140 } 3141 assert(index == depth, "just checking"); 3142 3143 return (jobjectArray) JNIHandles::make_local(env, result); 3144 JVM_END 3145 3146 3147 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3148 JVMWrapper("JVM_ClassDepth"); 3149 ResourceMark rm(THREAD); 3150 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3151 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3152 3153 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3154 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3155 if (class_name_sym == NULL) { 3156 return -1; 3157 } 3158 3159 int depth = 0; 3160 3161 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3162 if (!vfst.method()->is_native()) { 3163 klassOop holder = vfst.method()->method_holder(); 3164 assert(holder->is_klass(), "just checking"); 3165 if (instanceKlass::cast(holder)->name() == class_name_sym) { 3166 return depth; 3167 } 3168 depth++; 3169 } 3170 } 3171 return -1; 3172 JVM_END 3173 3174 3175 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3176 JVMWrapper("JVM_ClassLoaderDepth"); 3177 ResourceMark rm(THREAD); 3178 int depth = 0; 3179 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3180 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3181 bool trusted = is_trusted_frame(thread, &vfst); 3182 if (trusted) return -1; 3183 3184 methodOop m = vfst.method(); 3185 if (!m->is_native()) { 3186 klassOop holder = m->method_holder(); 3187 assert(holder->is_klass(), "just checking"); 3188 oop loader = instanceKlass::cast(holder)->class_loader(); 3189 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3190 return depth; 3191 } 3192 depth++; 3193 } 3194 } 3195 return -1; 3196 JVM_END 3197 3198 3199 // java.lang.Package //////////////////////////////////////////////////////////////// 3200 3201 3202 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3203 JVMWrapper("JVM_GetSystemPackage"); 3204 ResourceMark rm(THREAD); 3205 JvmtiVMObjectAllocEventCollector oam; 3206 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3207 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3208 return (jstring) JNIHandles::make_local(result); 3209 JVM_END 3210 3211 3212 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3213 JVMWrapper("JVM_GetSystemPackages"); 3214 JvmtiVMObjectAllocEventCollector oam; 3215 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3216 return (jobjectArray) JNIHandles::make_local(result); 3217 JVM_END 3218 3219 3220 // ObjectInputStream /////////////////////////////////////////////////////////////// 3221 3222 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { 3223 if (current_class == NULL) { 3224 return true; 3225 } 3226 if ((current_class == field_class) || access.is_public()) { 3227 return true; 3228 } 3229 3230 if (access.is_protected()) { 3231 // See if current_class is a subclass of field_class 3232 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3233 return true; 3234 } 3235 } 3236 3237 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); 3238 } 3239 3240 3241 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3242 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3243 JVMWrapper("JVM_AllocateNewObject"); 3244 JvmtiVMObjectAllocEventCollector oam; 3245 // Receiver is not used 3246 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3247 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3248 3249 // Cannot instantiate primitive types 3250 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3251 ResourceMark rm(THREAD); 3252 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3253 } 3254 3255 // Arrays not allowed here, must use JVM_AllocateNewArray 3256 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || 3257 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { 3258 ResourceMark rm(THREAD); 3259 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3260 } 3261 3262 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); 3263 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); 3264 3265 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3266 3267 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3268 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3269 3270 // Make sure klass is initialized, since we are about to instantiate one of them. 3271 curr_klass->initialize(CHECK_NULL); 3272 3273 methodHandle m (THREAD, 3274 init_klass->find_method(vmSymbols::object_initializer_name(), 3275 vmSymbols::void_method_signature())); 3276 if (m.is_null()) { 3277 ResourceMark rm(THREAD); 3278 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3279 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), 3280 vmSymbols::object_initializer_name(), 3281 vmSymbols::void_method_signature())); 3282 } 3283 3284 if (curr_klass == init_klass && !m->is_public()) { 3285 // Calling the constructor for class 'curr_klass'. 3286 // Only allow calls to a public no-arg constructor. 3287 // This path corresponds to creating an Externalizable object. 3288 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3289 } 3290 3291 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3292 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3293 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3294 } 3295 3296 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3297 // Call constructor m. This might call a constructor higher up in the hierachy 3298 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3299 3300 return JNIHandles::make_local(obj()); 3301 JVM_END 3302 3303 3304 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3305 JVMWrapper("JVM_AllocateNewArray"); 3306 JvmtiVMObjectAllocEventCollector oam; 3307 oop mirror = JNIHandles::resolve_non_null(currClass); 3308 3309 if (java_lang_Class::is_primitive(mirror)) { 3310 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3311 } 3312 klassOop k = java_lang_Class::as_klassOop(mirror); 3313 oop result; 3314 3315 if (k->klass_part()->oop_is_typeArray()) { 3316 // typeArray 3317 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3318 } else if (k->klass_part()->oop_is_objArray()) { 3319 // objArray 3320 objArrayKlassHandle oak(THREAD, k); 3321 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3322 result = oak->allocate(length, CHECK_NULL); 3323 } else { 3324 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3325 } 3326 return JNIHandles::make_local(env, result); 3327 JVM_END 3328 3329 3330 // Return the first non-null class loader up the execution stack, or null 3331 // if only code from the null class loader is on the stack. 3332 3333 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3334 if (UsePrimordialLoaderCache) { 3335 oop cachedLoader = Universe::get_cached_loader(); 3336 if (cachedLoader != NULL && (oop)cachedLoader != (oop)-1) { 3337 return JNIHandles::make_local(env, cachedLoader); 3338 } 3339 } 3340 3341 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3342 // UseNewReflection 3343 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3344 klassOop holder = vfst.method()->method_holder(); 3345 oop loader = instanceKlass::cast(holder)->class_loader(); 3346 if (loader != NULL) { 3347 if (UsePrimordialLoaderCache) { 3348 Universe::check_or_set_cached_loader(loader); 3349 } 3350 return JNIHandles::make_local(env, loader); 3351 } 3352 } 3353 return NULL; 3354 JVM_END 3355 3356 3357 // Load a class relative to the most recent class on the stack with a non-null 3358 // classloader. 3359 // This function has been deprecated and should not be considered part of the 3360 // specified JVM interface. 3361 3362 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3363 jclass currClass, jstring currClassName)) 3364 JVMWrapper("JVM_LoadClass0"); 3365 // Receiver is not used 3366 ResourceMark rm(THREAD); 3367 3368 // Class name argument is not guaranteed to be in internal format 3369 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3370 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3371 3372 const char* str = java_lang_String::as_utf8_string(string()); 3373 3374 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3375 // It's impossible to create this class; the name cannot fit 3376 // into the constant pool. 3377 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3378 } 3379 3380 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3381 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3382 // Find the most recent class on the stack with a non-null classloader 3383 oop loader = NULL; 3384 oop protection_domain = NULL; 3385 if (curr_klass.is_null()) { 3386 for (vframeStream vfst(thread); 3387 !vfst.at_end() && loader == NULL; 3388 vfst.next()) { 3389 if (!vfst.method()->is_native()) { 3390 klassOop holder = vfst.method()->method_holder(); 3391 loader = instanceKlass::cast(holder)->class_loader(); 3392 protection_domain = instanceKlass::cast(holder)->protection_domain(); 3393 } 3394 } 3395 } else { 3396 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); 3397 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); 3398 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); 3399 } 3400 Handle h_loader(THREAD, loader); 3401 Handle h_prot (THREAD, protection_domain); 3402 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3403 false, thread); 3404 if (TraceClassResolution && result != NULL) { 3405 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 3406 } 3407 return result; 3408 JVM_END 3409 3410 3411 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3412 3413 3414 // resolve array handle and check arguments 3415 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3416 if (arr == NULL) { 3417 THROW_0(vmSymbols::java_lang_NullPointerException()); 3418 } 3419 oop a = JNIHandles::resolve_non_null(arr); 3420 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { 3421 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3422 } 3423 return arrayOop(a); 3424 } 3425 3426 3427 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3428 JVMWrapper("JVM_GetArrayLength"); 3429 arrayOop a = check_array(env, arr, false, CHECK_0); 3430 return a->length(); 3431 JVM_END 3432 3433 3434 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3435 JVMWrapper("JVM_Array_Get"); 3436 JvmtiVMObjectAllocEventCollector oam; 3437 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3438 jvalue value; 3439 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3440 oop box = Reflection::box(&value, type, CHECK_NULL); 3441 return JNIHandles::make_local(env, box); 3442 JVM_END 3443 3444 3445 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3446 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3447 jvalue value; 3448 value.i = 0; // to initialize value before getting used in CHECK 3449 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3450 assert(a->is_typeArray(), "just checking"); 3451 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3452 BasicType wide_type = (BasicType) wCode; 3453 if (type != wide_type) { 3454 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3455 } 3456 return value; 3457 JVM_END 3458 3459 3460 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3461 JVMWrapper("JVM_SetArrayElement"); 3462 arrayOop a = check_array(env, arr, false, CHECK); 3463 oop box = JNIHandles::resolve(val); 3464 jvalue value; 3465 value.i = 0; // to initialize value before getting used in CHECK 3466 BasicType value_type; 3467 if (a->is_objArray()) { 3468 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3469 value_type = Reflection::unbox_for_regular_object(box, &value); 3470 } else { 3471 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3472 } 3473 Reflection::array_set(&value, a, index, value_type, CHECK); 3474 JVM_END 3475 3476 3477 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3478 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3479 arrayOop a = check_array(env, arr, true, CHECK); 3480 assert(a->is_typeArray(), "just checking"); 3481 BasicType value_type = (BasicType) vCode; 3482 Reflection::array_set(&v, a, index, value_type, CHECK); 3483 JVM_END 3484 3485 3486 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3487 JVMWrapper("JVM_NewArray"); 3488 JvmtiVMObjectAllocEventCollector oam; 3489 oop element_mirror = JNIHandles::resolve(eltClass); 3490 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3491 return JNIHandles::make_local(env, result); 3492 JVM_END 3493 3494 3495 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3496 JVMWrapper("JVM_NewMultiArray"); 3497 JvmtiVMObjectAllocEventCollector oam; 3498 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3499 oop element_mirror = JNIHandles::resolve(eltClass); 3500 assert(dim_array->is_typeArray(), "just checking"); 3501 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3502 return JNIHandles::make_local(env, result); 3503 JVM_END 3504 3505 3506 // Networking library support //////////////////////////////////////////////////////////////////// 3507 3508 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3509 JVMWrapper("JVM_InitializeSocketLibrary"); 3510 return 0; 3511 JVM_END 3512 3513 3514 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3515 JVMWrapper("JVM_Socket"); 3516 return os::socket(domain, type, protocol); 3517 JVM_END 3518 3519 3520 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3521 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3522 //%note jvm_r6 3523 return os::socket_close(fd); 3524 JVM_END 3525 3526 3527 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3528 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3529 //%note jvm_r6 3530 return os::socket_shutdown(fd, howto); 3531 JVM_END 3532 3533 3534 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3535 JVMWrapper2("JVM_Recv (0x%x)", fd); 3536 //%note jvm_r6 3537 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3538 JVM_END 3539 3540 3541 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3542 JVMWrapper2("JVM_Send (0x%x)", fd); 3543 //%note jvm_r6 3544 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3545 JVM_END 3546 3547 3548 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3549 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3550 //%note jvm_r6 3551 return os::timeout(fd, timeout); 3552 JVM_END 3553 3554 3555 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3556 JVMWrapper2("JVM_Listen (0x%x)", fd); 3557 //%note jvm_r6 3558 return os::listen(fd, count); 3559 JVM_END 3560 3561 3562 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3563 JVMWrapper2("JVM_Connect (0x%x)", fd); 3564 //%note jvm_r6 3565 return os::connect(fd, him, (socklen_t)len); 3566 JVM_END 3567 3568 3569 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3570 JVMWrapper2("JVM_Bind (0x%x)", fd); 3571 //%note jvm_r6 3572 return os::bind(fd, him, (socklen_t)len); 3573 JVM_END 3574 3575 3576 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3577 JVMWrapper2("JVM_Accept (0x%x)", fd); 3578 //%note jvm_r6 3579 socklen_t socklen = (socklen_t)(*len); 3580 jint result = os::accept(fd, him, &socklen); 3581 *len = (jint)socklen; 3582 return result; 3583 JVM_END 3584 3585 3586 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3587 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3588 //%note jvm_r6 3589 socklen_t socklen = (socklen_t)(*fromlen); 3590 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3591 *fromlen = (int)socklen; 3592 return result; 3593 JVM_END 3594 3595 3596 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3597 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3598 //%note jvm_r6 3599 socklen_t socklen = (socklen_t)(*len); 3600 jint result = os::get_sock_name(fd, him, &socklen); 3601 *len = (int)socklen; 3602 return result; 3603 JVM_END 3604 3605 3606 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3607 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3608 //%note jvm_r6 3609 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3610 JVM_END 3611 3612 3613 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3614 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3615 //%note jvm_r6 3616 return os::socket_available(fd, pbytes); 3617 JVM_END 3618 3619 3620 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3621 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3622 //%note jvm_r6 3623 socklen_t socklen = (socklen_t)(*optlen); 3624 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3625 *optlen = (int)socklen; 3626 return result; 3627 JVM_END 3628 3629 3630 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3631 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3632 //%note jvm_r6 3633 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3634 JVM_END 3635 3636 3637 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3638 JVMWrapper("JVM_GetHostName"); 3639 return os::get_host_name(name, namelen); 3640 JVM_END 3641 3642 3643 // Library support /////////////////////////////////////////////////////////////////////////// 3644 3645 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3646 //%note jvm_ct 3647 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3648 char ebuf[1024]; 3649 void *load_result; 3650 { 3651 ThreadToNativeFromVM ttnfvm(thread); 3652 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3653 } 3654 if (load_result == NULL) { 3655 char msg[1024]; 3656 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3657 // Since 'ebuf' may contain a string encoded using 3658 // platform encoding scheme, we need to pass 3659 // Exceptions::unsafe_to_utf8 to the new_exception method 3660 // as the last argument. See bug 6367357. 3661 Handle h_exception = 3662 Exceptions::new_exception(thread, 3663 vmSymbols::java_lang_UnsatisfiedLinkError(), 3664 msg, Exceptions::unsafe_to_utf8); 3665 3666 THROW_HANDLE_0(h_exception); 3667 } 3668 return load_result; 3669 JVM_END 3670 3671 3672 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3673 JVMWrapper("JVM_UnloadLibrary"); 3674 os::dll_unload(handle); 3675 JVM_END 3676 3677 3678 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3679 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3680 return os::dll_lookup(handle, name); 3681 JVM_END 3682 3683 3684 // Floating point support //////////////////////////////////////////////////////////////////// 3685 3686 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3687 JVMWrapper("JVM_IsNaN"); 3688 return g_isnan(a); 3689 JVM_END 3690 3691 3692 // JNI version /////////////////////////////////////////////////////////////////////////////// 3693 3694 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3695 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3696 return Threads::is_supported_jni_version_including_1_1(version); 3697 JVM_END 3698 3699 3700 // String support /////////////////////////////////////////////////////////////////////////// 3701 3702 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3703 JVMWrapper("JVM_InternString"); 3704 JvmtiVMObjectAllocEventCollector oam; 3705 if (str == NULL) return NULL; 3706 oop string = JNIHandles::resolve_non_null(str); 3707 oop result = StringTable::intern(string, CHECK_NULL); 3708 return (jstring) JNIHandles::make_local(env, result); 3709 JVM_END 3710 3711 3712 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3713 3714 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3715 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3716 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3717 // that only works with java threads. 3718 3719 3720 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3721 VM_Exit::block_if_vm_exited(); 3722 JVMWrapper("JVM_RawMonitorCreate"); 3723 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3724 } 3725 3726 3727 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3728 VM_Exit::block_if_vm_exited(); 3729 JVMWrapper("JVM_RawMonitorDestroy"); 3730 delete ((Mutex*) mon); 3731 } 3732 3733 3734 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3735 VM_Exit::block_if_vm_exited(); 3736 JVMWrapper("JVM_RawMonitorEnter"); 3737 ((Mutex*) mon)->jvm_raw_lock(); 3738 return 0; 3739 } 3740 3741 3742 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3743 VM_Exit::block_if_vm_exited(); 3744 JVMWrapper("JVM_RawMonitorExit"); 3745 ((Mutex*) mon)->jvm_raw_unlock(); 3746 } 3747 3748 3749 // Support for Serialization 3750 3751 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3752 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3753 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3754 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3755 3756 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3757 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3758 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3759 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3760 3761 3762 void initialize_converter_functions() { 3763 if (JDK_Version::is_gte_jdk14x_version()) { 3764 // These functions only exist for compatibility with 1.3.1 and earlier 3765 return; 3766 } 3767 3768 // called from universe_post_init() 3769 assert( 3770 int_bits_to_float_fn == NULL && 3771 long_bits_to_double_fn == NULL && 3772 float_to_int_bits_fn == NULL && 3773 double_to_long_bits_fn == NULL , 3774 "initialization done twice" 3775 ); 3776 // initialize 3777 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3778 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3779 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3780 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3781 // verify 3782 assert( 3783 int_bits_to_float_fn != NULL && 3784 long_bits_to_double_fn != NULL && 3785 float_to_int_bits_fn != NULL && 3786 double_to_long_bits_fn != NULL , 3787 "initialization failed" 3788 ); 3789 } 3790 3791 3792 // Serialization 3793 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3794 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3795 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3796 3797 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3798 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3799 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3800 oop o = JNIHandles::resolve(obj); 3801 3802 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3803 THROW(vmSymbols::java_lang_NullPointerException()); 3804 } 3805 3806 jsize nfids = fids->length(); 3807 if (nfids == 0) return; 3808 3809 if (tcodes->length() < nfids) { 3810 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3811 } 3812 3813 jsize off = 0; 3814 /* loop through fields, setting values */ 3815 for (jsize i = 0; i < nfids; i++) { 3816 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3817 int field_offset; 3818 if (fid != NULL) { 3819 // NULL is a legal value for fid, but retrieving the field offset 3820 // trigger assertion in that case 3821 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3822 } 3823 3824 switch (tcodes->char_at(i)) { 3825 case 'Z': 3826 if (fid != NULL) { 3827 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3828 o->bool_field_put(field_offset, val); 3829 } 3830 off++; 3831 break; 3832 3833 case 'B': 3834 if (fid != NULL) { 3835 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3836 } 3837 off++; 3838 break; 3839 3840 case 'C': 3841 if (fid != NULL) { 3842 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3843 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3844 o->char_field_put(field_offset, val); 3845 } 3846 off += 2; 3847 break; 3848 3849 case 'S': 3850 if (fid != NULL) { 3851 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3852 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3853 o->short_field_put(field_offset, val); 3854 } 3855 off += 2; 3856 break; 3857 3858 case 'I': 3859 if (fid != NULL) { 3860 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3861 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3862 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3863 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3864 o->int_field_put(field_offset, ival); 3865 } 3866 off += 4; 3867 break; 3868 3869 case 'F': 3870 if (fid != NULL) { 3871 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3872 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3873 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3874 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3875 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3876 o->float_field_put(field_offset, fval); 3877 } 3878 off += 4; 3879 break; 3880 3881 case 'J': 3882 if (fid != NULL) { 3883 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3884 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3885 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3886 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3887 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3888 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3889 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3890 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3891 o->long_field_put(field_offset, lval); 3892 } 3893 off += 8; 3894 break; 3895 3896 case 'D': 3897 if (fid != NULL) { 3898 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3899 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3900 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3901 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3902 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3903 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3904 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3905 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3906 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3907 o->double_field_put(field_offset, dval); 3908 } 3909 off += 8; 3910 break; 3911 3912 default: 3913 // Illegal typecode 3914 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3915 } 3916 } 3917 JVM_END 3918 3919 3920 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3921 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3922 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3923 3924 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3925 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3926 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3927 oop o = JNIHandles::resolve(obj); 3928 3929 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3930 THROW(vmSymbols::java_lang_NullPointerException()); 3931 } 3932 3933 jsize nfids = fids->length(); 3934 if (nfids == 0) return; 3935 3936 if (tcodes->length() < nfids) { 3937 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3938 } 3939 3940 /* loop through fields, fetching values */ 3941 jsize off = 0; 3942 for (jsize i = 0; i < nfids; i++) { 3943 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3944 if (fid == NULL) { 3945 THROW(vmSymbols::java_lang_NullPointerException()); 3946 } 3947 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3948 3949 switch (tcodes->char_at(i)) { 3950 case 'Z': 3951 { 3952 jboolean val = o->bool_field(field_offset); 3953 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3954 } 3955 break; 3956 3957 case 'B': 3958 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3959 break; 3960 3961 case 'C': 3962 { 3963 jchar val = o->char_field(field_offset); 3964 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3965 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3966 } 3967 break; 3968 3969 case 'S': 3970 { 3971 jshort val = o->short_field(field_offset); 3972 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3973 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3974 } 3975 break; 3976 3977 case 'I': 3978 { 3979 jint val = o->int_field(field_offset); 3980 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3981 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3982 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3983 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3984 } 3985 break; 3986 3987 case 'F': 3988 { 3989 jfloat fval = o->float_field(field_offset); 3990 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3991 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3992 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3993 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3994 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3995 } 3996 break; 3997 3998 case 'J': 3999 { 4000 jlong val = o->long_field(field_offset); 4001 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 4002 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 4003 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 4004 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 4005 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4006 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4007 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4008 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4009 } 4010 break; 4011 4012 case 'D': 4013 { 4014 jdouble dval = o->double_field(field_offset); 4015 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 4016 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 4017 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 4018 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 4019 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 4020 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 4021 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 4022 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 4023 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 4024 } 4025 break; 4026 4027 default: 4028 // Illegal typecode 4029 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4030 } 4031 } 4032 JVM_END 4033 4034 4035 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 4036 4037 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 4038 // Security Note: 4039 // The Java level wrapper will perform the necessary security check allowing 4040 // us to pass the NULL as the initiating class loader. 4041 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 4042 4043 KlassHandle klass_handle(THREAD, klass); 4044 // Check if we should initialize the class 4045 if (init && klass_handle->oop_is_instance()) { 4046 klass_handle->initialize(CHECK_NULL); 4047 } 4048 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 4049 } 4050 4051 4052 // Internal SQE debugging support /////////////////////////////////////////////////////////// 4053 4054 #ifndef PRODUCT 4055 4056 extern "C" { 4057 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 4058 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 4059 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 4060 } 4061 4062 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4063 JVMWrapper("JVM_AccessBoolVMFlag"); 4064 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4065 JVM_END 4066 4067 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4068 JVMWrapper("JVM_AccessVMIntFlag"); 4069 intx v; 4070 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4071 *value = (jint)v; 4072 return result; 4073 JVM_END 4074 4075 4076 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4077 JVMWrapper("JVM_VMBreakPoint"); 4078 oop the_obj = JNIHandles::resolve(obj); 4079 BREAKPOINT; 4080 JVM_END 4081 4082 4083 #endif 4084 4085 4086 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4087 4088 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4089 JVMWrapper("JVM_InvokeMethod"); 4090 Handle method_handle; 4091 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4092 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4093 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4094 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4095 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4096 jobject res = JNIHandles::make_local(env, result); 4097 if (JvmtiExport::should_post_vm_object_alloc()) { 4098 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4099 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4100 if (java_lang_Class::is_primitive(ret_type)) { 4101 // Only for primitive type vm allocates memory for java object. 4102 // See box() method. 4103 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4104 } 4105 } 4106 return res; 4107 } else { 4108 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4109 } 4110 JVM_END 4111 4112 4113 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4114 JVMWrapper("JVM_NewInstanceFromConstructor"); 4115 oop constructor_mirror = JNIHandles::resolve(c); 4116 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4117 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4118 jobject res = JNIHandles::make_local(env, result); 4119 if (JvmtiExport::should_post_vm_object_alloc()) { 4120 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4121 } 4122 return res; 4123 JVM_END 4124 4125 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4126 4127 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4128 JVMWrapper("JVM_SupportsCX8"); 4129 return VM_Version::supports_cx8(); 4130 JVM_END 4131 4132 4133 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4134 JVMWrapper("JVM_CX8Field"); 4135 jlong res; 4136 oop o = JNIHandles::resolve(obj); 4137 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4138 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4139 4140 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4141 res = Atomic::cmpxchg(newVal, addr, oldVal); 4142 4143 return res == oldVal; 4144 JVM_END 4145 4146 // DTrace /////////////////////////////////////////////////////////////////// 4147 4148 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4149 JVMWrapper("JVM_DTraceGetVersion"); 4150 return (jint)JVM_TRACING_DTRACE_VERSION; 4151 JVM_END 4152 4153 JVM_ENTRY(jlong,JVM_DTraceActivate( 4154 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4155 JVM_DTraceProvider* providers)) 4156 JVMWrapper("JVM_DTraceActivate"); 4157 return DTraceJSDT::activate( 4158 version, module_name, providers_count, providers, CHECK_0); 4159 JVM_END 4160 4161 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4162 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4163 return DTraceJSDT::is_probe_enabled(method); 4164 JVM_END 4165 4166 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4167 JVMWrapper("JVM_DTraceDispose"); 4168 DTraceJSDT::dispose(handle); 4169 JVM_END 4170 4171 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4172 JVMWrapper("JVM_DTraceIsSupported"); 4173 return DTraceJSDT::is_supported(); 4174 JVM_END 4175 4176 // Returns an array of all live Thread objects (VM internal JavaThreads, 4177 // jvmti agent threads, and JNI attaching threads are skipped) 4178 // See CR 6404306 regarding JNI attaching threads 4179 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4180 ResourceMark rm(THREAD); 4181 ThreadsListEnumerator tle(THREAD, false, false); 4182 JvmtiVMObjectAllocEventCollector oam; 4183 4184 int num_threads = tle.num_threads(); 4185 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4186 objArrayHandle threads_ah(THREAD, r); 4187 4188 for (int i = 0; i < num_threads; i++) { 4189 Handle h = tle.get_threadObj(i); 4190 threads_ah->obj_at_put(i, h()); 4191 } 4192 4193 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4194 JVM_END 4195 4196 4197 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4198 // Return StackTraceElement[][], each element is the stack trace of a thread in 4199 // the corresponding entry in the given threads array 4200 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4201 JVMWrapper("JVM_DumpThreads"); 4202 JvmtiVMObjectAllocEventCollector oam; 4203 4204 // Check if threads is null 4205 if (threads == NULL) { 4206 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4207 } 4208 4209 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4210 objArrayHandle ah(THREAD, a); 4211 int num_threads = ah->length(); 4212 // check if threads is non-empty array 4213 if (num_threads == 0) { 4214 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4215 } 4216 4217 // check if threads is not an array of objects of Thread class 4218 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); 4219 if (k != SystemDictionary::Thread_klass()) { 4220 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4221 } 4222 4223 ResourceMark rm(THREAD); 4224 4225 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4226 for (int i = 0; i < num_threads; i++) { 4227 oop thread_obj = ah->obj_at(i); 4228 instanceHandle h(THREAD, (instanceOop) thread_obj); 4229 thread_handle_array->append(h); 4230 } 4231 4232 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4233 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4234 4235 JVM_END 4236 4237 // JVM monitoring and management support 4238 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4239 return Management::get_jmm_interface(version); 4240 JVM_END 4241 4242 // com.sun.tools.attach.VirtualMachine agent properties support 4243 // 4244 // Initialize the agent properties with the properties maintained in the VM 4245 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4246 JVMWrapper("JVM_InitAgentProperties"); 4247 ResourceMark rm; 4248 4249 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4250 4251 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4252 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4253 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4254 return properties; 4255 JVM_END 4256 4257 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4258 { 4259 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4260 JvmtiVMObjectAllocEventCollector oam; 4261 4262 if (ofClass == NULL) { 4263 return NULL; 4264 } 4265 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4266 // Special handling for primitive objects 4267 if (java_lang_Class::is_primitive(mirror())) { 4268 return NULL; 4269 } 4270 klassOop k = java_lang_Class::as_klassOop(mirror()); 4271 if (!Klass::cast(k)->oop_is_instance()) { 4272 return NULL; 4273 } 4274 instanceKlassHandle ik_h(THREAD, k); 4275 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4276 if (encl_method_class_idx == 0) { 4277 return NULL; 4278 } 4279 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4280 objArrayHandle dest(THREAD, dest_o); 4281 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4282 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4283 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4284 if (encl_method_method_idx != 0) { 4285 Symbol* sym = ik_h->constants()->symbol_at( 4286 extract_low_short_from_int( 4287 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4288 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4289 dest->obj_at_put(1, str()); 4290 sym = ik_h->constants()->symbol_at( 4291 extract_high_short_from_int( 4292 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4293 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4294 dest->obj_at_put(2, str()); 4295 } 4296 return (jobjectArray) JNIHandles::make_local(dest()); 4297 } 4298 JVM_END 4299 4300 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4301 jint javaThreadState)) 4302 { 4303 // If new thread states are added in future JDK and VM versions, 4304 // this should check if the JDK version is compatible with thread 4305 // states supported by the VM. Return NULL if not compatible. 4306 // 4307 // This function must map the VM java_lang_Thread::ThreadStatus 4308 // to the Java thread state that the JDK supports. 4309 // 4310 4311 typeArrayHandle values_h; 4312 switch (javaThreadState) { 4313 case JAVA_THREAD_STATE_NEW : { 4314 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4315 values_h = typeArrayHandle(THREAD, r); 4316 values_h->int_at_put(0, java_lang_Thread::NEW); 4317 break; 4318 } 4319 case JAVA_THREAD_STATE_RUNNABLE : { 4320 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4321 values_h = typeArrayHandle(THREAD, r); 4322 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4323 break; 4324 } 4325 case JAVA_THREAD_STATE_BLOCKED : { 4326 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4327 values_h = typeArrayHandle(THREAD, r); 4328 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4329 break; 4330 } 4331 case JAVA_THREAD_STATE_WAITING : { 4332 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4333 values_h = typeArrayHandle(THREAD, r); 4334 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4335 values_h->int_at_put(1, java_lang_Thread::PARKED); 4336 break; 4337 } 4338 case JAVA_THREAD_STATE_TIMED_WAITING : { 4339 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4340 values_h = typeArrayHandle(THREAD, r); 4341 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4342 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4343 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4344 break; 4345 } 4346 case JAVA_THREAD_STATE_TERMINATED : { 4347 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4348 values_h = typeArrayHandle(THREAD, r); 4349 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4350 break; 4351 } 4352 default: 4353 // Unknown state - probably incompatible JDK version 4354 return NULL; 4355 } 4356 4357 return (jintArray) JNIHandles::make_local(env, values_h()); 4358 } 4359 JVM_END 4360 4361 4362 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4363 jint javaThreadState, 4364 jintArray values)) 4365 { 4366 // If new thread states are added in future JDK and VM versions, 4367 // this should check if the JDK version is compatible with thread 4368 // states supported by the VM. Return NULL if not compatible. 4369 // 4370 // This function must map the VM java_lang_Thread::ThreadStatus 4371 // to the Java thread state that the JDK supports. 4372 // 4373 4374 ResourceMark rm; 4375 4376 // Check if threads is null 4377 if (values == NULL) { 4378 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4379 } 4380 4381 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4382 typeArrayHandle values_h(THREAD, v); 4383 4384 objArrayHandle names_h; 4385 switch (javaThreadState) { 4386 case JAVA_THREAD_STATE_NEW : { 4387 assert(values_h->length() == 1 && 4388 values_h->int_at(0) == java_lang_Thread::NEW, 4389 "Invalid threadStatus value"); 4390 4391 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4392 1, /* only 1 substate */ 4393 CHECK_NULL); 4394 names_h = objArrayHandle(THREAD, r); 4395 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4396 names_h->obj_at_put(0, name()); 4397 break; 4398 } 4399 case JAVA_THREAD_STATE_RUNNABLE : { 4400 assert(values_h->length() == 1 && 4401 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4402 "Invalid threadStatus value"); 4403 4404 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4405 1, /* only 1 substate */ 4406 CHECK_NULL); 4407 names_h = objArrayHandle(THREAD, r); 4408 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4409 names_h->obj_at_put(0, name()); 4410 break; 4411 } 4412 case JAVA_THREAD_STATE_BLOCKED : { 4413 assert(values_h->length() == 1 && 4414 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4415 "Invalid threadStatus value"); 4416 4417 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4418 1, /* only 1 substate */ 4419 CHECK_NULL); 4420 names_h = objArrayHandle(THREAD, r); 4421 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4422 names_h->obj_at_put(0, name()); 4423 break; 4424 } 4425 case JAVA_THREAD_STATE_WAITING : { 4426 assert(values_h->length() == 2 && 4427 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4428 values_h->int_at(1) == java_lang_Thread::PARKED, 4429 "Invalid threadStatus value"); 4430 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4431 2, /* number of substates */ 4432 CHECK_NULL); 4433 names_h = objArrayHandle(THREAD, r); 4434 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4435 CHECK_NULL); 4436 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4437 CHECK_NULL); 4438 names_h->obj_at_put(0, name0()); 4439 names_h->obj_at_put(1, name1()); 4440 break; 4441 } 4442 case JAVA_THREAD_STATE_TIMED_WAITING : { 4443 assert(values_h->length() == 3 && 4444 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4445 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4446 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4447 "Invalid threadStatus value"); 4448 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4449 3, /* number of substates */ 4450 CHECK_NULL); 4451 names_h = objArrayHandle(THREAD, r); 4452 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4453 CHECK_NULL); 4454 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4455 CHECK_NULL); 4456 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4457 CHECK_NULL); 4458 names_h->obj_at_put(0, name0()); 4459 names_h->obj_at_put(1, name1()); 4460 names_h->obj_at_put(2, name2()); 4461 break; 4462 } 4463 case JAVA_THREAD_STATE_TERMINATED : { 4464 assert(values_h->length() == 1 && 4465 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4466 "Invalid threadStatus value"); 4467 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4468 1, /* only 1 substate */ 4469 CHECK_NULL); 4470 names_h = objArrayHandle(THREAD, r); 4471 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4472 names_h->obj_at_put(0, name()); 4473 break; 4474 } 4475 default: 4476 // Unknown state - probably incompatible JDK version 4477 return NULL; 4478 } 4479 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4480 } 4481 JVM_END 4482 4483 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4484 { 4485 memset(info, 0, sizeof(info_size)); 4486 4487 info->jvm_version = Abstract_VM_Version::jvm_version(); 4488 info->update_version = 0; /* 0 in HotSpot Express VM */ 4489 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4490 4491 // when we add a new capability in the jvm_version_info struct, we should also 4492 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4493 // counter defined in runtimeService.cpp. 4494 info->is_attachable = AttachListener::is_attach_supported(); 4495 #ifdef KERNEL 4496 info->is_kernel_jvm = 1; // true; 4497 #else // KERNEL 4498 info->is_kernel_jvm = 0; // false; 4499 #endif // KERNEL 4500 } 4501 JVM_END --- EOF ---