jvm.cpp revision 235:9c2ecc2ffb12
1/* 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_jvm.cpp.incl" 27#include <errno.h> 28 29/* 30 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 31 such ctors and calls MUST NOT come between an oop declaration/init and its 32 usage because if objects are move this may cause various memory stomps, bus 33 errors and segfaults. Here is a cookbook for causing so called "naked oop 34 failures": 35 36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 37 JVMWrapper("JVM_GetClassDeclaredFields"); 38 39 // Object address to be held directly in mirror & not visible to GC 40 oop mirror = JNIHandles::resolve_non_null(ofClass); 41 42 // If this ctor can hit a safepoint, moving objects around, then 43 ComplexConstructor foo; 44 45 // Boom! mirror may point to JUNK instead of the intended object 46 (some dereference of mirror) 47 48 // Here's another call that may block for GC, making mirror stale 49 MutexLocker ml(some_lock); 50 51 // And here's an initializer that can result in a stale oop 52 // all in one step. 53 oop o = call_that_can_throw_exception(TRAPS); 54 55 56 The solution is to keep the oop declaration BELOW the ctor or function 57 call that might cause a GC, do another resolve to reassign the oop, or 58 consider use of a Handle instead of an oop so there is immunity from object 59 motion. But note that the "QUICK" entries below do not have a handlemark 60 and thus can only support use of handles passed in. 61*/ 62 63static void trace_class_resolution_impl(klassOop to_class, TRAPS) { 64 ResourceMark rm; 65 int line_number = -1; 66 const char * source_file = NULL; 67 klassOop caller = NULL; 68 JavaThread* jthread = JavaThread::current(); 69 if (jthread->has_last_Java_frame()) { 70 vframeStream vfst(jthread); 71 72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); 74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); 76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 77 78 methodOop last_caller = NULL; 79 80 while (!vfst.at_end()) { 81 methodOop m = vfst.method(); 82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&& 83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && 84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { 85 break; 86 } 87 last_caller = m; 88 vfst.next(); 89 } 90 // if this is called from Class.forName0 and that is called from Class.forName, 91 // then print the caller of Class.forName. If this is Class.loadClass, then print 92 // that caller, otherwise keep quiet since this should be picked up elsewhere. 93 bool found_it = false; 94 if (!vfst.at_end() && 95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 96 vfst.method()->name() == vmSymbols::forName0_name()) { 97 vfst.next(); 98 if (!vfst.at_end() && 99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 100 vfst.method()->name() == vmSymbols::forName_name()) { 101 vfst.next(); 102 found_it = true; 103 } 104 } else if (last_caller != NULL && 105 instanceKlass::cast(last_caller->method_holder())->name() == 106 vmSymbols::java_lang_ClassLoader() && 107 (last_caller->name() == vmSymbols::loadClassInternal_name() || 108 last_caller->name() == vmSymbols::loadClass_name())) { 109 found_it = true; 110 } 111 if (found_it && !vfst.at_end()) { 112 // found the caller 113 caller = vfst.method()->method_holder(); 114 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); 116 if (s != NULL) { 117 source_file = s->as_C_string(); 118 } 119 } 120 } 121 if (caller != NULL) { 122 if (to_class != caller) { 123 const char * from = Klass::cast(caller)->external_name(); 124 const char * to = Klass::cast(to_class)->external_name(); 125 // print in a single call to reduce interleaving between threads 126 if (source_file != NULL) { 127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number); 128 } else { 129 tty->print("RESOLVE %s %s (explicit)\n", from, to); 130 } 131 } 132 } 133} 134 135static void trace_class_resolution(klassOop to_class) { 136 EXCEPTION_MARK; 137 trace_class_resolution_impl(to_class, THREAD); 138 if (HAS_PENDING_EXCEPTION) { 139 CLEAR_PENDING_EXCEPTION; 140 } 141} 142 143// Wrapper to trace JVM functions 144 145#ifdef ASSERT 146 class JVMTraceWrapper : public StackObj { 147 public: 148 JVMTraceWrapper(const char* format, ...) { 149 if (TraceJVMCalls) { 150 va_list ap; 151 va_start(ap, format); 152 tty->print("JVM "); 153 tty->vprint_cr(format, ap); 154 va_end(ap); 155 } 156 } 157 }; 158 159 Histogram* JVMHistogram; 160 volatile jint JVMHistogram_lock = 0; 161 162 class JVMHistogramElement : public HistogramElement { 163 public: 164 JVMHistogramElement(const char* name); 165 }; 166 167 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 168 _name = elementName; 169 uintx count = 0; 170 171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 173 count +=1; 174 if ( (WarnOnStalledSpinLock > 0) 175 && (count % WarnOnStalledSpinLock == 0)) { 176 warning("JVMHistogram_lock seems to be stalled"); 177 } 178 } 179 } 180 181 if(JVMHistogram == NULL) 182 JVMHistogram = new Histogram("JVM Call Counts",100); 183 184 JVMHistogram->add_element(this); 185 Atomic::dec(&JVMHistogram_lock); 186 } 187 188 #define JVMCountWrapper(arg) \ 189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 191 192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 196#else 197 #define JVMWrapper(arg1) 198 #define JVMWrapper2(arg1, arg2) 199 #define JVMWrapper3(arg1, arg2, arg3) 200 #define JVMWrapper4(arg1, arg2, arg3, arg4) 201#endif 202 203 204// Interface version ///////////////////////////////////////////////////////////////////// 205 206 207JVM_LEAF(jint, JVM_GetInterfaceVersion()) 208 return JVM_INTERFACE_VERSION; 209JVM_END 210 211 212// java.lang.System ////////////////////////////////////////////////////////////////////// 213 214 215JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 216 JVMWrapper("JVM_CurrentTimeMillis"); 217 return os::javaTimeMillis(); 218JVM_END 219 220JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 221 JVMWrapper("JVM_NanoTime"); 222 return os::javaTimeNanos(); 223JVM_END 224 225 226JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 227 jobject dst, jint dst_pos, jint length)) 228 JVMWrapper("JVM_ArrayCopy"); 229 // Check if we have null pointers 230 if (src == NULL || dst == NULL) { 231 THROW(vmSymbols::java_lang_NullPointerException()); 232 } 233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 237 // Do copy 238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); 239JVM_END 240 241 242static void set_property(Handle props, const char* key, const char* value, TRAPS) { 243 JavaValue r(T_OBJECT); 244 // public synchronized Object put(Object key, Object value); 245 HandleMark hm(THREAD); 246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 248 JavaCalls::call_virtual(&r, 249 props, 250 KlassHandle(THREAD, SystemDictionary::properties_klass()), 251 vmSymbolHandles::put_name(), 252 vmSymbolHandles::object_object_object_signature(), 253 key_str, 254 value_str, 255 THREAD); 256} 257 258 259#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 260 261 262JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 263 JVMWrapper("JVM_InitProperties"); 264 ResourceMark rm; 265 266 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 267 268 // System property list includes both user set via -D option and 269 // jvm system specific properties. 270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 271 PUTPROP(props, p->key(), p->value()); 272 } 273 274 // Convert the -XX:MaxDirectMemorySize= command line flag 275 // to the sun.nio.MaxDirectMemorySize property. 276 // Do this after setting user properties to prevent people 277 // from setting the value with a -D option, as requested. 278 { 279 char as_chars[256]; 280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); 281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 282 } 283 284 // JVM monitoring and management support 285 // Add the sun.management.compiler property for the compiler's name 286 { 287#undef CSIZE 288#if defined(_LP64) || defined(_WIN64) 289 #define CSIZE "64-Bit " 290#else 291 #define CSIZE 292#endif // 64bit 293 294#ifdef TIERED 295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 296#else 297#if defined(COMPILER1) 298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 299#elif defined(COMPILER2) 300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 301#else 302 const char* compiler_name = ""; 303#endif // compilers 304#endif // TIERED 305 306 if (*compiler_name != '\0' && 307 (Arguments::mode() != Arguments::_int)) { 308 PUTPROP(props, "sun.management.compiler", compiler_name); 309 } 310 } 311 312 return properties; 313JVM_END 314 315 316// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 317 318extern volatile jint vm_created; 319 320JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 321 if (vm_created != 0 && (code == 0)) { 322 // The VM is about to exit. We call back into Java to check whether finalizers should be run 323 Universe::run_finalizers_on_exit(); 324 } 325 before_exit(thread); 326 vm_exit(code); 327JVM_END 328 329 330JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 331 before_exit(thread); 332 vm_exit(code); 333JVM_END 334 335 336JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 337 register_on_exit_function(func); 338JVM_END 339 340 341JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 342 JVMWrapper("JVM_GC"); 343 if (!DisableExplicitGC) { 344 Universe::heap()->collect(GCCause::_java_lang_system_gc); 345 } 346JVM_END 347 348 349JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 350 JVMWrapper("JVM_MaxObjectInspectionAge"); 351 return Universe::heap()->millis_since_last_gc(); 352JVM_END 353 354 355JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 357JVM_END 358 359 360JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 362JVM_END 363 364static inline jlong convert_size_t_to_jlong(size_t val) { 365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 366 NOT_LP64 (return (jlong)val;) 367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 368} 369 370JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 371 JVMWrapper("JVM_TotalMemory"); 372 size_t n = Universe::heap()->capacity(); 373 return convert_size_t_to_jlong(n); 374JVM_END 375 376 377JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 378 JVMWrapper("JVM_FreeMemory"); 379 CollectedHeap* ch = Universe::heap(); 380 size_t n = ch->capacity() - ch->used(); 381 return convert_size_t_to_jlong(n); 382JVM_END 383 384 385JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 386 JVMWrapper("JVM_MaxMemory"); 387 size_t n = Universe::heap()->max_capacity(); 388 return convert_size_t_to_jlong(n); 389JVM_END 390 391 392JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 393 JVMWrapper("JVM_ActiveProcessorCount"); 394 return os::active_processor_count(); 395JVM_END 396 397 398 399// java.lang.Throwable ////////////////////////////////////////////////////// 400 401 402JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 403 JVMWrapper("JVM_FillInStackTrace"); 404 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 405 java_lang_Throwable::fill_in_stack_trace(exception); 406JVM_END 407 408 409JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 410 JVMWrapper("JVM_PrintStackTrace"); 411 // Note: This is no longer used in Merlin, but we still support it for compatibility. 412 oop exception = JNIHandles::resolve_non_null(receiver); 413 oop stream = JNIHandles::resolve_non_null(printable); 414 java_lang_Throwable::print_stack_trace(exception, stream); 415JVM_END 416 417 418JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 419 JVMWrapper("JVM_GetStackTraceDepth"); 420 oop exception = JNIHandles::resolve(throwable); 421 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 422JVM_END 423 424 425JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 426 JVMWrapper("JVM_GetStackTraceElement"); 427 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 428 oop exception = JNIHandles::resolve(throwable); 429 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 430 return JNIHandles::make_local(env, element); 431JVM_END 432 433 434// java.lang.Object /////////////////////////////////////////////// 435 436 437JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 438 JVMWrapper("JVM_IHashCode"); 439 // as implemented in the classic virtual machine; return 0 if object is NULL 440 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 441JVM_END 442 443 444JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 445 JVMWrapper("JVM_MonitorWait"); 446 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 447 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); 448 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 449 if (JvmtiExport::should_post_monitor_wait()) { 450 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 451 } 452 ObjectSynchronizer::wait(obj, ms, CHECK); 453JVM_END 454 455 456JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 457 JVMWrapper("JVM_MonitorNotify"); 458 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 459 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); 460 ObjectSynchronizer::notify(obj, CHECK); 461JVM_END 462 463 464JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 465 JVMWrapper("JVM_MonitorNotifyAll"); 466 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 467 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); 468 ObjectSynchronizer::notifyall(obj, CHECK); 469JVM_END 470 471 472JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 473 JVMWrapper("JVM_Clone"); 474 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 475 const KlassHandle klass (THREAD, obj->klass()); 476 JvmtiVMObjectAllocEventCollector oam; 477 478#ifdef ASSERT 479 // Just checking that the cloneable flag is set correct 480 if (obj->is_javaArray()) { 481 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 482 } else { 483 guarantee(obj->is_instance(), "should be instanceOop"); 484 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass()); 485 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 486 } 487#endif 488 489 // Check if class of obj supports the Cloneable interface. 490 // All arrays are considered to be cloneable (See JLS 20.1.5) 491 if (!klass->is_cloneable()) { 492 ResourceMark rm(THREAD); 493 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 494 } 495 496 // Make shallow object copy 497 const int size = obj->size(); 498 oop new_obj = NULL; 499 if (obj->is_javaArray()) { 500 const int length = ((arrayOop)obj())->length(); 501 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 502 } else { 503 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 504 } 505 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 506 // is modifying a reference field in the clonee, a non-oop-atomic copy might 507 // be suspended in the middle of copying the pointer and end up with parts 508 // of two different pointers in the field. Subsequent dereferences will crash. 509 // 4846409: an oop-copy of objects with long or double fields or arrays of same 510 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 511 // of oops. We know objects are aligned on a minimum of an jlong boundary. 512 // The same is true of StubRoutines::object_copy and the various oop_copy 513 // variants, and of the code generated by the inline_native_clone intrinsic. 514 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 515 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 516 (size_t)align_object_size(size) / HeapWordsPerLong); 517 // Clear the header 518 new_obj->init_mark(); 519 520 // Store check (mark entire object and let gc sort it out) 521 BarrierSet* bs = Universe::heap()->barrier_set(); 522 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 523 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 524 525 // Caution: this involves a java upcall, so the clone should be 526 // "gc-robust" by this stage. 527 if (klass->has_finalizer()) { 528 assert(obj->is_instance(), "should be instanceOop"); 529 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 530 } 531 532 return JNIHandles::make_local(env, oop(new_obj)); 533JVM_END 534 535// java.lang.Compiler //////////////////////////////////////////////////// 536 537// The initial cuts of the HotSpot VM will not support JITs, and all existing 538// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 539// functions are all silently ignored unless JVM warnings are printed. 540 541JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 542 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 543JVM_END 544 545 546JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 547 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 548 return JNI_FALSE; 549JVM_END 550 551 552JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 553 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 554 return JNI_FALSE; 555JVM_END 556 557 558JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 559 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 560 return JNI_FALSE; 561JVM_END 562 563 564JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 565 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 566 return NULL; 567JVM_END 568 569 570JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 571 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 572JVM_END 573 574 575JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 576 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 577JVM_END 578 579 580 581// Error message support ////////////////////////////////////////////////////// 582 583JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 584 JVMWrapper("JVM_GetLastErrorString"); 585 return hpi::lasterror(buf, len); 586JVM_END 587 588 589// java.io.File /////////////////////////////////////////////////////////////// 590 591JVM_LEAF(char*, JVM_NativePath(char* path)) 592 JVMWrapper2("JVM_NativePath (%s)", path); 593 return hpi::native_path(path); 594JVM_END 595 596 597// Misc. class handling /////////////////////////////////////////////////////////// 598 599 600JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 601 JVMWrapper("JVM_GetCallerClass"); 602 klassOop k = thread->security_get_caller_class(depth); 603 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 604JVM_END 605 606 607JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 608 JVMWrapper("JVM_FindPrimitiveClass"); 609 oop mirror = NULL; 610 BasicType t = name2type(utf); 611 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 612 mirror = Universe::java_mirror(t); 613 } 614 if (mirror == NULL) { 615 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 616 } else { 617 return (jclass) JNIHandles::make_local(env, mirror); 618 } 619JVM_END 620 621 622JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 623 JVMWrapper("JVM_ResolveClass"); 624 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 625JVM_END 626 627// Rationale behind JVM_FindClassFromBootLoader 628// a> JVM_FindClassFromClassLoader was never exported in the export tables. 629// b> because of (a) java.dll has a direct dependecy on the unexported 630// private symbol "_JVM_FindClassFromClassLoader@20". 631// c> the launcher cannot use the private symbol as it dynamically opens 632// the entry point, so if something changes, the launcher will fail 633// unexpectedly at runtime, it is safest for the launcher to dlopen a 634// stable exported interface. 635// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 636// signature to change from _JVM_FindClassFromClassLoader@20 to 637// JVM_FindClassFromClassLoader and will not be backward compatible 638// with older JDKs. 639// Thus a public/stable exported entry point is the right solution, 640// public here means public in linker semantics, and is exported only 641// to the JDK, and is not intended to be a public API. 642 643JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 644 const char* name, 645 jboolean throwError)) 646 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name, 647 throwError ? "error" : "exception"); 648 return JVM_FindClassFromClassLoader(env, name, JNI_FALSE, 649 (jobject)NULL, throwError); 650JVM_END 651 652JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 653 jboolean init, jobject loader, 654 jboolean throwError)) 655 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 656 throwError ? "error" : "exception"); 657 // Java libraries should ensure that name is never null... 658 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 659 // It's impossible to create this class; the name cannot fit 660 // into the constant pool. 661 if (throwError) { 662 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 663 } else { 664 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 665 } 666 } 667 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 668 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 669 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 670 Handle(), throwError, thread); 671 672 if (TraceClassResolution && result != NULL) { 673 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 674 } 675 676 return result; 677JVM_END 678 679 680JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 681 jboolean init, jclass from)) 682 JVMWrapper2("JVM_FindClassFromClass %s", name); 683 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 684 // It's impossible to create this class; the name cannot fit 685 // into the constant pool. 686 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 687 } 688 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 689 oop from_class_oop = JNIHandles::resolve(from); 690 klassOop from_class = (from_class_oop == NULL) 691 ? (klassOop)NULL 692 : java_lang_Class::as_klassOop(from_class_oop); 693 oop class_loader = NULL; 694 oop protection_domain = NULL; 695 if (from_class != NULL) { 696 class_loader = Klass::cast(from_class)->class_loader(); 697 protection_domain = Klass::cast(from_class)->protection_domain(); 698 } 699 Handle h_loader(THREAD, class_loader); 700 Handle h_prot (THREAD, protection_domain); 701 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 702 h_prot, true, thread); 703 704 if (TraceClassResolution && result != NULL) { 705 // this function is generally only used for class loading during verification. 706 ResourceMark rm; 707 oop from_mirror = JNIHandles::resolve_non_null(from); 708 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); 709 const char * from_name = Klass::cast(from_class)->external_name(); 710 711 oop mirror = JNIHandles::resolve_non_null(result); 712 klassOop to_class = java_lang_Class::as_klassOop(mirror); 713 const char * to = Klass::cast(to_class)->external_name(); 714 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 715 } 716 717 return result; 718JVM_END 719 720static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 721 if (loader.is_null()) { 722 return; 723 } 724 725 // check whether the current caller thread holds the lock or not. 726 // If not, increment the corresponding counter 727 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 728 ObjectSynchronizer::owner_self) { 729 counter->inc(); 730 } 731} 732 733// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 734static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) { 735 736 // Since exceptions can be thrown, class initialization can take place 737 // if name is NULL no check for class name in .class stream has to be made. 738 symbolHandle class_name; 739 if (name != NULL) { 740 const int str_len = (int)strlen(name); 741 if (str_len > symbolOopDesc::max_length()) { 742 // It's impossible to create this class; the name cannot fit 743 // into the constant pool. 744 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 745 } 746 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); 747 } 748 749 ResourceMark rm(THREAD); 750 ClassFileStream st((u1*) buf, len, (char *)source); 751 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 752 if (UsePerfData) { 753 is_lock_held_by_thread(class_loader, 754 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 755 THREAD); 756 } 757 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 758 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 759 protection_domain, &st, 760 CHECK_NULL); 761 762 if (TraceClassResolution && k != NULL) { 763 trace_class_resolution(k); 764 } 765 766 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 767} 768 769 770JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 771 JVMWrapper2("JVM_DefineClass %s", name); 772 773 return jvm_define_class_common(env, name, loader, buf, len, pd, "__JVM_DefineClass__", THREAD); 774JVM_END 775 776 777JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 778 JVMWrapper2("JVM_DefineClassWithSource %s", name); 779 780 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD); 781JVM_END 782 783 784JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 785 JVMWrapper("JVM_FindLoadedClass"); 786 ResourceMark rm(THREAD); 787 788 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 789 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 790 791 const char* str = java_lang_String::as_utf8_string(string()); 792 // Sanity check, don't expect null 793 if (str == NULL) return NULL; 794 795 const int str_len = (int)strlen(str); 796 if (str_len > symbolOopDesc::max_length()) { 797 // It's impossible to create this class; the name cannot fit 798 // into the constant pool. 799 return NULL; 800 } 801 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); 802 803 // Security Note: 804 // The Java level wrapper will perform the necessary security check allowing 805 // us to pass the NULL as the initiating class loader. 806 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 807 if (UsePerfData) { 808 is_lock_held_by_thread(h_loader, 809 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 810 THREAD); 811 } 812 813 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, 814 h_loader, 815 Handle(), 816 CHECK_NULL); 817 818 return (k == NULL) ? NULL : 819 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 820JVM_END 821 822 823// Reflection support ////////////////////////////////////////////////////////////////////////////// 824 825JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 826 assert (cls != NULL, "illegal class"); 827 JVMWrapper("JVM_GetClassName"); 828 JvmtiVMObjectAllocEventCollector oam; 829 ResourceMark rm(THREAD); 830 const char* name; 831 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 832 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 833 } else { 834 // Consider caching interned string in Klass 835 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 836 assert(k->is_klass(), "just checking"); 837 name = Klass::cast(k)->external_name(); 838 } 839 oop result = StringTable::intern((char*) name, CHECK_NULL); 840 return (jstring) JNIHandles::make_local(env, result); 841JVM_END 842 843 844JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 845 JVMWrapper("JVM_GetClassInterfaces"); 846 JvmtiVMObjectAllocEventCollector oam; 847 oop mirror = JNIHandles::resolve_non_null(cls); 848 849 // Special handling for primitive objects 850 if (java_lang_Class::is_primitive(mirror)) { 851 // Primitive objects does not have any interfaces 852 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 853 return (jobjectArray) JNIHandles::make_local(env, r); 854 } 855 856 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); 857 // Figure size of result array 858 int size; 859 if (klass->oop_is_instance()) { 860 size = instanceKlass::cast(klass())->local_interfaces()->length(); 861 } else { 862 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 863 size = 2; 864 } 865 866 // Allocate result array 867 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL); 868 objArrayHandle result (THREAD, r); 869 // Fill in result 870 if (klass->oop_is_instance()) { 871 // Regular instance klass, fill in all local interfaces 872 for (int index = 0; index < size; index++) { 873 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); 874 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 875 } 876 } else { 877 // All arrays implement java.lang.Cloneable and java.io.Serializable 878 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror()); 879 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror()); 880 } 881 return (jobjectArray) JNIHandles::make_local(env, result()); 882JVM_END 883 884 885JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 886 JVMWrapper("JVM_GetClassLoader"); 887 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 888 return NULL; 889 } 890 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 891 oop loader = Klass::cast(k)->class_loader(); 892 return JNIHandles::make_local(env, loader); 893JVM_END 894 895 896JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 897 JVMWrapper("JVM_IsInterface"); 898 oop mirror = JNIHandles::resolve_non_null(cls); 899 if (java_lang_Class::is_primitive(mirror)) { 900 return JNI_FALSE; 901 } 902 klassOop k = java_lang_Class::as_klassOop(mirror); 903 jboolean result = Klass::cast(k)->is_interface(); 904 assert(!result || Klass::cast(k)->oop_is_instance(), 905 "all interfaces are instance types"); 906 // The compiler intrinsic for isInterface tests the 907 // Klass::_access_flags bits in the same way. 908 return result; 909JVM_END 910 911 912JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 913 JVMWrapper("JVM_GetClassSigners"); 914 JvmtiVMObjectAllocEventCollector oam; 915 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 916 // There are no signers for primitive types 917 return NULL; 918 } 919 920 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 921 objArrayOop signers = NULL; 922 if (Klass::cast(k)->oop_is_instance()) { 923 signers = instanceKlass::cast(k)->signers(); 924 } 925 926 // If there are no signers set in the class, or if the class 927 // is an array, return NULL. 928 if (signers == NULL) return NULL; 929 930 // copy of the signers array 931 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); 932 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 933 for (int index = 0; index < signers->length(); index++) { 934 signers_copy->obj_at_put(index, signers->obj_at(index)); 935 } 936 937 // return the copy 938 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 939JVM_END 940 941 942JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 943 JVMWrapper("JVM_SetClassSigners"); 944 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 945 // This call is ignored for primitive types and arrays. 946 // Signers are only set once, ClassLoader.java, and thus shouldn't 947 // be called with an array. Only the bootstrap loader creates arrays. 948 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 949 if (Klass::cast(k)->oop_is_instance()) { 950 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 951 } 952 } 953JVM_END 954 955 956JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 957 JVMWrapper("JVM_GetProtectionDomain"); 958 if (JNIHandles::resolve(cls) == NULL) { 959 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 960 } 961 962 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 963 // Primitive types does not have a protection domain. 964 return NULL; 965 } 966 967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 968 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 969JVM_END 970 971 972// Obsolete since 1.2 (Class.setProtectionDomain removed), although 973// still defined in core libraries as of 1.5. 974JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 975 JVMWrapper("JVM_SetProtectionDomain"); 976 if (JNIHandles::resolve(cls) == NULL) { 977 THROW(vmSymbols::java_lang_NullPointerException()); 978 } 979 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 980 // Call is ignored for primitive types 981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 982 983 // cls won't be an array, as this called only from ClassLoader.defineClass 984 if (Klass::cast(k)->oop_is_instance()) { 985 oop pd = JNIHandles::resolve(protection_domain); 986 assert(pd == NULL || pd->is_oop(), "just checking"); 987 instanceKlass::cast(k)->set_protection_domain(pd); 988 } 989 } 990JVM_END 991 992 993JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 994 JVMWrapper("JVM_DoPrivileged"); 995 996 if (action == NULL) { 997 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 998 } 999 1000 // Stack allocated list of privileged stack elements 1001 PrivilegedElement pi; 1002 1003 // Check that action object understands "Object run()" 1004 Handle object (THREAD, JNIHandles::resolve(action)); 1005 1006 // get run() method 1007 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1008 vmSymbols::run_method_name(), 1009 vmSymbols::void_object_signature()); 1010 methodHandle m (THREAD, m_oop); 1011 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { 1012 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1013 } 1014 1015 // Compute the frame initiating the do privileged operation and setup the privileged stack 1016 vframeStream vfst(thread); 1017 vfst.security_get_caller_frame(1); 1018 1019 if (!vfst.at_end()) { 1020 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1021 thread->set_privileged_stack_top(&pi); 1022 } 1023 1024 1025 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1026 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1027 Handle pending_exception; 1028 JavaValue result(T_OBJECT); 1029 JavaCallArguments args(object); 1030 JavaCalls::call(&result, m, &args, THREAD); 1031 1032 // done with action, remove ourselves from the list 1033 if (!vfst.at_end()) { 1034 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1035 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1036 } 1037 1038 if (HAS_PENDING_EXCEPTION) { 1039 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1040 CLEAR_PENDING_EXCEPTION; 1041 1042 if ( pending_exception->is_a(SystemDictionary::exception_klass()) && 1043 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) { 1044 // Throw a java.security.PrivilegedActionException(Exception e) exception 1045 JavaCallArguments args(pending_exception); 1046 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), 1047 vmSymbolHandles::exception_void_signature(), 1048 &args); 1049 } 1050 } 1051 1052 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1053 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1054JVM_END 1055 1056 1057// Returns the inherited_access_control_context field of the running thread. 1058JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1059 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1060 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1061 return JNIHandles::make_local(env, result); 1062JVM_END 1063 1064class RegisterArrayForGC { 1065 private: 1066 JavaThread *_thread; 1067 public: 1068 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1069 _thread = thread; 1070 _thread->register_array_for_gc(array); 1071 } 1072 1073 ~RegisterArrayForGC() { 1074 _thread->register_array_for_gc(NULL); 1075 } 1076}; 1077 1078 1079JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1080 JVMWrapper("JVM_GetStackAccessControlContext"); 1081 if (!UsePrivilegedStack) return NULL; 1082 1083 ResourceMark rm(THREAD); 1084 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1085 JvmtiVMObjectAllocEventCollector oam; 1086 1087 // count the protection domains on the execution stack. We collapse 1088 // duplicate consecutive protection domains into a single one, as 1089 // well as stopping when we hit a privileged frame. 1090 1091 // Use vframeStream to iterate through Java frames 1092 vframeStream vfst(thread); 1093 1094 oop previous_protection_domain = NULL; 1095 Handle privileged_context(thread, NULL); 1096 bool is_privileged = false; 1097 oop protection_domain = NULL; 1098 1099 for(; !vfst.at_end(); vfst.next()) { 1100 // get method of frame 1101 methodOop method = vfst.method(); 1102 intptr_t* frame_id = vfst.frame_id(); 1103 1104 // check the privileged frames to see if we have a match 1105 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1106 // this frame is privileged 1107 is_privileged = true; 1108 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1109 protection_domain = thread->privileged_stack_top()->protection_domain(); 1110 } else { 1111 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 1112 } 1113 1114 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1115 local_array->push(protection_domain); 1116 previous_protection_domain = protection_domain; 1117 } 1118 1119 if (is_privileged) break; 1120 } 1121 1122 1123 // either all the domains on the stack were system domains, or 1124 // we had a privileged system domain 1125 if (local_array->is_empty()) { 1126 if (is_privileged && privileged_context.is_null()) return NULL; 1127 1128 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1129 return JNIHandles::make_local(env, result); 1130 } 1131 1132 // the resource area must be registered in case of a gc 1133 RegisterArrayForGC ragc(thread, local_array); 1134 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(), 1135 local_array->length(), CHECK_NULL); 1136 objArrayHandle h_context(thread, context); 1137 for (int index = 0; index < local_array->length(); index++) { 1138 h_context->obj_at_put(index, local_array->at(index)); 1139 } 1140 1141 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1142 1143 return JNIHandles::make_local(env, result); 1144JVM_END 1145 1146 1147JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1148 JVMWrapper("JVM_IsArrayClass"); 1149 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1150 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; 1151JVM_END 1152 1153 1154JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1155 JVMWrapper("JVM_IsPrimitiveClass"); 1156 oop mirror = JNIHandles::resolve_non_null(cls); 1157 return (jboolean) java_lang_Class::is_primitive(mirror); 1158JVM_END 1159 1160 1161JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1162 JVMWrapper("JVM_GetComponentType"); 1163 oop mirror = JNIHandles::resolve_non_null(cls); 1164 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1165 return (jclass) JNIHandles::make_local(env, result); 1166JVM_END 1167 1168 1169JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1170 JVMWrapper("JVM_GetClassModifiers"); 1171 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1172 // Primitive type 1173 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1174 } 1175 1176 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1177 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1178 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1179 return k->modifier_flags(); 1180JVM_END 1181 1182 1183// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1184 1185JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1186 const int inner_class_info_index = 0; 1187 const int outer_class_info_index = 1; 1188 1189 JvmtiVMObjectAllocEventCollector oam; 1190 // ofClass is a reference to a java_lang_Class object. The mirror object 1191 // of an instanceKlass 1192 1193 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1194 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1195 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 1196 return (jobjectArray)JNIHandles::make_local(env, result); 1197 } 1198 1199 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1200 1201 if (k->inner_classes()->length() == 0) { 1202 // Neither an inner nor outer class 1203 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 1204 return (jobjectArray)JNIHandles::make_local(env, result); 1205 } 1206 1207 // find inner class info 1208 typeArrayHandle icls(thread, k->inner_classes()); 1209 constantPoolHandle cp(thread, k->constants()); 1210 int length = icls->length(); 1211 1212 // Allocate temp. result array 1213 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL); 1214 objArrayHandle result (THREAD, r); 1215 int members = 0; 1216 1217 for(int i = 0; i < length; i += 4) { 1218 int ioff = icls->ushort_at(i + inner_class_info_index); 1219 int ooff = icls->ushort_at(i + outer_class_info_index); 1220 1221 if (ioff != 0 && ooff != 0) { 1222 // Check to see if the name matches the class we're looking for 1223 // before attempting to find the class. 1224 if (cp->klass_name_at_matches(k, ooff)) { 1225 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); 1226 if (outer_klass == k()) { 1227 klassOop ik = cp->klass_at(ioff, CHECK_NULL); 1228 instanceKlassHandle inner_klass (THREAD, ik); 1229 1230 // Throws an exception if outer klass has not declared k as 1231 // an inner klass 1232 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL); 1233 1234 result->obj_at_put(members, inner_klass->java_mirror()); 1235 members++; 1236 } 1237 } 1238 } 1239 } 1240 1241 if (members != length) { 1242 // Return array of right length 1243 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL); 1244 for(int i = 0; i < members; i++) { 1245 res->obj_at_put(i, result->obj_at(i)); 1246 } 1247 return (jobjectArray)JNIHandles::make_local(env, res); 1248 } 1249 1250 return (jobjectArray)JNIHandles::make_local(env, result()); 1251JVM_END 1252 1253 1254JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1255 const int inner_class_info_index = 0; 1256 const int outer_class_info_index = 1; 1257 1258 // ofClass is a reference to a java_lang_Class object. 1259 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1260 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1261 return NULL; 1262 } 1263 1264 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1265 1266 if (k->inner_classes()->length() == 0) { 1267 // No inner class info => no declaring class 1268 return NULL; 1269 } 1270 1271 typeArrayHandle i_icls(thread, k->inner_classes()); 1272 constantPoolHandle i_cp(thread, k->constants()); 1273 int i_length = i_icls->length(); 1274 1275 bool found = false; 1276 klassOop ok; 1277 instanceKlassHandle outer_klass; 1278 1279 // Find inner_klass attribute 1280 for(int i = 0; i < i_length && !found; i+= 4) { 1281 int ioff = i_icls->ushort_at(i + inner_class_info_index); 1282 int ooff = i_icls->ushort_at(i + outer_class_info_index); 1283 1284 if (ioff != 0 && ooff != 0) { 1285 // Check to see if the name matches the class we're looking for 1286 // before attempting to find the class. 1287 if (i_cp->klass_name_at_matches(k, ioff)) { 1288 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1289 if (k() == inner_klass) { 1290 found = true; 1291 ok = i_cp->klass_at(ooff, CHECK_NULL); 1292 outer_klass = instanceKlassHandle(thread, ok); 1293 } 1294 } 1295 } 1296 } 1297 1298 // If no inner class attribute found for this class. 1299 if (!found) return NULL; 1300 1301 // Throws an exception if outer klass has not declared k as an inner klass 1302 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL); 1303 1304 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror()); 1305JVM_END 1306 1307 1308JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1309 assert (cls != NULL, "illegal class"); 1310 JVMWrapper("JVM_GetClassSignature"); 1311 JvmtiVMObjectAllocEventCollector oam; 1312 ResourceMark rm(THREAD); 1313 // Return null for arrays and primatives 1314 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1315 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1316 if (Klass::cast(k)->oop_is_instance()) { 1317 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); 1318 if (sym.is_null()) return NULL; 1319 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1320 return (jstring) JNIHandles::make_local(env, str()); 1321 } 1322 } 1323 return NULL; 1324JVM_END 1325 1326 1327JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1328 assert (cls != NULL, "illegal class"); 1329 JVMWrapper("JVM_GetClassAnnotations"); 1330 ResourceMark rm(THREAD); 1331 // Return null for arrays and primitives 1332 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1333 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1334 if (Klass::cast(k)->oop_is_instance()) { 1335 return (jbyteArray) JNIHandles::make_local(env, 1336 instanceKlass::cast(k)->class_annotations()); 1337 } 1338 } 1339 return NULL; 1340JVM_END 1341 1342 1343JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1344 assert(field != NULL, "illegal field"); 1345 JVMWrapper("JVM_GetFieldAnnotations"); 1346 1347 // some of this code was adapted from from jni_FromReflectedField 1348 1349 // field is a handle to a java.lang.reflect.Field object 1350 oop reflected = JNIHandles::resolve_non_null(field); 1351 oop mirror = java_lang_reflect_Field::clazz(reflected); 1352 klassOop k = java_lang_Class::as_klassOop(mirror); 1353 int slot = java_lang_reflect_Field::slot(reflected); 1354 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1355 1356 fieldDescriptor fd; 1357 KlassHandle kh(THREAD, k); 1358 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); 1359 1360 if (modifiers & JVM_ACC_STATIC) { 1361 // for static fields we only look in the current class 1362 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, 1363 true, &fd)) { 1364 assert(false, "cannot find static field"); 1365 return NULL; // robustness 1366 } 1367 } else { 1368 // for instance fields we start with the current class and work 1369 // our way up through the superclass chain 1370 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, 1371 &fd)) { 1372 assert(false, "cannot find instance field"); 1373 return NULL; // robustness 1374 } 1375 } 1376 1377 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); 1378JVM_END 1379 1380 1381static methodOop jvm_get_method_common(jobject method, TRAPS) { 1382 // some of this code was adapted from from jni_FromReflectedMethod 1383 1384 oop reflected = JNIHandles::resolve_non_null(method); 1385 oop mirror = NULL; 1386 int slot = 0; 1387 1388 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { 1389 mirror = java_lang_reflect_Constructor::clazz(reflected); 1390 slot = java_lang_reflect_Constructor::slot(reflected); 1391 } else { 1392 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), 1393 "wrong type"); 1394 mirror = java_lang_reflect_Method::clazz(reflected); 1395 slot = java_lang_reflect_Method::slot(reflected); 1396 } 1397 klassOop k = java_lang_Class::as_klassOop(mirror); 1398 1399 KlassHandle kh(THREAD, k); 1400 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); 1401 if (m == NULL) { 1402 assert(false, "cannot find method"); 1403 return NULL; // robustness 1404 } 1405 1406 return m; 1407} 1408 1409 1410JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1411 JVMWrapper("JVM_GetMethodAnnotations"); 1412 1413 // method is a handle to a java.lang.reflect.Method object 1414 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1415 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); 1416JVM_END 1417 1418 1419JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1420 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1421 1422 // method is a handle to a java.lang.reflect.Method object 1423 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1424 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); 1425JVM_END 1426 1427 1428JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1429 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1430 1431 // method is a handle to a java.lang.reflect.Method object 1432 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1433 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); 1434JVM_END 1435 1436 1437// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1438 1439JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1440{ 1441 JVMWrapper("JVM_GetClassDeclaredFields"); 1442 JvmtiVMObjectAllocEventCollector oam; 1443 1444 // Exclude primitive types and array types 1445 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1446 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1447 // Return empty array 1448 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL); 1449 return (jobjectArray) JNIHandles::make_local(env, res); 1450 } 1451 1452 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1453 constantPoolHandle cp(THREAD, k->constants()); 1454 1455 // Ensure class is linked 1456 k->link_class(CHECK_NULL); 1457 1458 typeArrayHandle fields(THREAD, k->fields()); 1459 int fields_len = fields->length(); 1460 1461 // 4496456 We need to filter out java.lang.Throwable.backtrace 1462 bool skip_backtrace = false; 1463 1464 // Allocate result 1465 int num_fields; 1466 1467 if (publicOnly) { 1468 num_fields = 0; 1469 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { 1470 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1471 if (mods & JVM_ACC_PUBLIC) ++num_fields; 1472 } 1473 } else { 1474 num_fields = fields_len / instanceKlass::next_offset; 1475 1476 if (k() == SystemDictionary::throwable_klass()) { 1477 num_fields--; 1478 skip_backtrace = true; 1479 } 1480 } 1481 1482 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL); 1483 objArrayHandle result (THREAD, r); 1484 1485 int out_idx = 0; 1486 fieldDescriptor fd; 1487 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { 1488 if (skip_backtrace) { 1489 // 4496456 skip java.lang.Throwable.backtrace 1490 int offset = k->offset_from_fields(i); 1491 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1492 } 1493 1494 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1495 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { 1496 fd.initialize(k(), i); 1497 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1498 result->obj_at_put(out_idx, field); 1499 ++out_idx; 1500 } 1501 } 1502 assert(out_idx == num_fields, "just checking"); 1503 return (jobjectArray) JNIHandles::make_local(env, result()); 1504} 1505JVM_END 1506 1507JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1508{ 1509 JVMWrapper("JVM_GetClassDeclaredMethods"); 1510 JvmtiVMObjectAllocEventCollector oam; 1511 1512 // Exclude primitive types and array types 1513 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1514 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1515 // Return empty array 1516 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL); 1517 return (jobjectArray) JNIHandles::make_local(env, res); 1518 } 1519 1520 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1521 1522 // Ensure class is linked 1523 k->link_class(CHECK_NULL); 1524 1525 objArrayHandle methods (THREAD, k->methods()); 1526 int methods_length = methods->length(); 1527 int num_methods = 0; 1528 1529 int i; 1530 for (i = 0; i < methods_length; i++) { 1531 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1532 if (!method->is_initializer()) { 1533 if (!publicOnly || method->is_public()) { 1534 ++num_methods; 1535 } 1536 } 1537 } 1538 1539 // Allocate result 1540 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL); 1541 objArrayHandle result (THREAD, r); 1542 1543 int out_idx = 0; 1544 for (i = 0; i < methods_length; i++) { 1545 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1546 if (!method->is_initializer()) { 1547 if (!publicOnly || method->is_public()) { 1548 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1549 result->obj_at_put(out_idx, m); 1550 ++out_idx; 1551 } 1552 } 1553 } 1554 assert(out_idx == num_methods, "just checking"); 1555 return (jobjectArray) JNIHandles::make_local(env, result()); 1556} 1557JVM_END 1558 1559JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1560{ 1561 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1562 JvmtiVMObjectAllocEventCollector oam; 1563 1564 // Exclude primitive types and array types 1565 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1566 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1567 // Return empty array 1568 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL); 1569 return (jobjectArray) JNIHandles::make_local(env, res); 1570 } 1571 1572 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1573 1574 // Ensure class is linked 1575 k->link_class(CHECK_NULL); 1576 1577 objArrayHandle methods (THREAD, k->methods()); 1578 int methods_length = methods->length(); 1579 int num_constructors = 0; 1580 1581 int i; 1582 for (i = 0; i < methods_length; i++) { 1583 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1584 if (method->is_initializer() && !method->is_static()) { 1585 if (!publicOnly || method->is_public()) { 1586 ++num_constructors; 1587 } 1588 } 1589 } 1590 1591 // Allocate result 1592 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL); 1593 objArrayHandle result(THREAD, r); 1594 1595 int out_idx = 0; 1596 for (i = 0; i < methods_length; i++) { 1597 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1598 if (method->is_initializer() && !method->is_static()) { 1599 if (!publicOnly || method->is_public()) { 1600 oop m = Reflection::new_constructor(method, CHECK_NULL); 1601 result->obj_at_put(out_idx, m); 1602 ++out_idx; 1603 } 1604 } 1605 } 1606 assert(out_idx == num_constructors, "just checking"); 1607 return (jobjectArray) JNIHandles::make_local(env, result()); 1608} 1609JVM_END 1610 1611JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1612{ 1613 JVMWrapper("JVM_GetClassAccessFlags"); 1614 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1615 // Primitive type 1616 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1617 } 1618 1619 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1620 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1621} 1622JVM_END 1623 1624 1625// Constant pool access ////////////////////////////////////////////////////////// 1626 1627JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1628{ 1629 JVMWrapper("JVM_GetClassConstantPool"); 1630 JvmtiVMObjectAllocEventCollector oam; 1631 1632 // Return null for primitives and arrays 1633 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1634 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1635 if (Klass::cast(k)->oop_is_instance()) { 1636 instanceKlassHandle k_h(THREAD, k); 1637 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1638 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); 1639 return JNIHandles::make_local(jcp()); 1640 } 1641 } 1642 return NULL; 1643} 1644JVM_END 1645 1646 1647JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) 1648{ 1649 JVMWrapper("JVM_ConstantPoolGetSize"); 1650 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1651 return cp->length(); 1652} 1653JVM_END 1654 1655 1656static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1657 if (!cp->is_within_bounds(index)) { 1658 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1659 } 1660} 1661 1662 1663JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1664{ 1665 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1666 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1667 bounds_check(cp, index, CHECK_NULL); 1668 constantTag tag = cp->tag_at(index); 1669 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1670 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1671 } 1672 klassOop k = cp->klass_at(index, CHECK_NULL); 1673 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1674} 1675JVM_END 1676 1677 1678JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1679{ 1680 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1681 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1682 bounds_check(cp, index, CHECK_NULL); 1683 constantTag tag = cp->tag_at(index); 1684 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1685 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1686 } 1687 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); 1688 if (k == NULL) return NULL; 1689 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1690} 1691JVM_END 1692 1693static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1694 constantTag tag = cp->tag_at(index); 1695 if (!tag.is_method() && !tag.is_interface_method()) { 1696 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1697 } 1698 int klass_ref = cp->uncached_klass_ref_index_at(index); 1699 klassOop k_o; 1700 if (force_resolution) { 1701 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1702 } else { 1703 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1704 if (k_o == NULL) return NULL; 1705 } 1706 instanceKlassHandle k(THREAD, k_o); 1707 symbolOop name = cp->uncached_name_ref_at(index); 1708 symbolOop sig = cp->uncached_signature_ref_at(index); 1709 methodHandle m (THREAD, k->find_method(name, sig)); 1710 if (m.is_null()) { 1711 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1712 } 1713 oop method; 1714 if (!m->is_initializer() || m->is_static()) { 1715 method = Reflection::new_method(m, true, true, CHECK_NULL); 1716 } else { 1717 method = Reflection::new_constructor(m, CHECK_NULL); 1718 } 1719 return JNIHandles::make_local(method); 1720} 1721 1722JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1723{ 1724 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1725 JvmtiVMObjectAllocEventCollector oam; 1726 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1727 bounds_check(cp, index, CHECK_NULL); 1728 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1729 return res; 1730} 1731JVM_END 1732 1733JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1734{ 1735 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1736 JvmtiVMObjectAllocEventCollector oam; 1737 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1738 bounds_check(cp, index, CHECK_NULL); 1739 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1740 return res; 1741} 1742JVM_END 1743 1744static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1745 constantTag tag = cp->tag_at(index); 1746 if (!tag.is_field()) { 1747 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1748 } 1749 int klass_ref = cp->uncached_klass_ref_index_at(index); 1750 klassOop k_o; 1751 if (force_resolution) { 1752 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1753 } else { 1754 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1755 if (k_o == NULL) return NULL; 1756 } 1757 instanceKlassHandle k(THREAD, k_o); 1758 symbolOop name = cp->uncached_name_ref_at(index); 1759 symbolOop sig = cp->uncached_signature_ref_at(index); 1760 fieldDescriptor fd; 1761 klassOop target_klass = k->find_field(name, sig, &fd); 1762 if (target_klass == NULL) { 1763 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1764 } 1765 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1766 return JNIHandles::make_local(field); 1767} 1768 1769JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1770{ 1771 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1772 JvmtiVMObjectAllocEventCollector oam; 1773 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1774 bounds_check(cp, index, CHECK_NULL); 1775 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1776 return res; 1777} 1778JVM_END 1779 1780JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1781{ 1782 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1783 JvmtiVMObjectAllocEventCollector oam; 1784 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1785 bounds_check(cp, index, CHECK_NULL); 1786 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1787 return res; 1788} 1789JVM_END 1790 1791JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1792{ 1793 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1794 JvmtiVMObjectAllocEventCollector oam; 1795 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1796 bounds_check(cp, index, CHECK_NULL); 1797 constantTag tag = cp->tag_at(index); 1798 if (!tag.is_field_or_method()) { 1799 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1800 } 1801 int klass_ref = cp->uncached_klass_ref_index_at(index); 1802 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); 1803 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); 1804 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); 1805 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL); 1806 objArrayHandle dest(THREAD, dest_o); 1807 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1808 dest->obj_at_put(0, str()); 1809 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1810 dest->obj_at_put(1, str()); 1811 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1812 dest->obj_at_put(2, str()); 1813 return (jobjectArray) JNIHandles::make_local(dest()); 1814} 1815JVM_END 1816 1817JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1818{ 1819 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1820 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1821 bounds_check(cp, index, CHECK_0); 1822 constantTag tag = cp->tag_at(index); 1823 if (!tag.is_int()) { 1824 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1825 } 1826 return cp->int_at(index); 1827} 1828JVM_END 1829 1830JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1831{ 1832 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1833 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1834 bounds_check(cp, index, CHECK_(0L)); 1835 constantTag tag = cp->tag_at(index); 1836 if (!tag.is_long()) { 1837 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1838 } 1839 return cp->long_at(index); 1840} 1841JVM_END 1842 1843JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1844{ 1845 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1846 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1847 bounds_check(cp, index, CHECK_(0.0f)); 1848 constantTag tag = cp->tag_at(index); 1849 if (!tag.is_float()) { 1850 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1851 } 1852 return cp->float_at(index); 1853} 1854JVM_END 1855 1856JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1857{ 1858 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1860 bounds_check(cp, index, CHECK_(0.0)); 1861 constantTag tag = cp->tag_at(index); 1862 if (!tag.is_double()) { 1863 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1864 } 1865 return cp->double_at(index); 1866} 1867JVM_END 1868 1869JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1870{ 1871 JVMWrapper("JVM_ConstantPoolGetStringAt"); 1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1873 bounds_check(cp, index, CHECK_NULL); 1874 constantTag tag = cp->tag_at(index); 1875 if (!tag.is_string() && !tag.is_unresolved_string()) { 1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1877 } 1878 oop str = cp->string_at(index, CHECK_NULL); 1879 return (jstring) JNIHandles::make_local(str); 1880} 1881JVM_END 1882 1883JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1884{ 1885 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 1886 JvmtiVMObjectAllocEventCollector oam; 1887 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1888 bounds_check(cp, index, CHECK_NULL); 1889 constantTag tag = cp->tag_at(index); 1890 if (!tag.is_symbol()) { 1891 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1892 } 1893 symbolOop sym_o = cp->symbol_at(index); 1894 symbolHandle sym(THREAD, sym_o); 1895 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1896 return (jstring) JNIHandles::make_local(str()); 1897} 1898JVM_END 1899 1900 1901// Assertion support. ////////////////////////////////////////////////////////// 1902 1903JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 1904 JVMWrapper("JVM_DesiredAssertionStatus"); 1905 assert(cls != NULL, "bad class"); 1906 1907 oop r = JNIHandles::resolve(cls); 1908 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 1909 if (java_lang_Class::is_primitive(r)) return false; 1910 1911 klassOop k = java_lang_Class::as_klassOop(r); 1912 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 1913 if (! Klass::cast(k)->oop_is_instance()) return false; 1914 1915 ResourceMark rm(THREAD); 1916 const char* name = Klass::cast(k)->name()->as_C_string(); 1917 bool system_class = Klass::cast(k)->class_loader() == NULL; 1918 return JavaAssertions::enabled(name, system_class); 1919 1920JVM_END 1921 1922 1923// Return a new AssertionStatusDirectives object with the fields filled in with 1924// command-line assertion arguments (i.e., -ea, -da). 1925JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 1926 JVMWrapper("JVM_AssertionStatusDirectives"); 1927 JvmtiVMObjectAllocEventCollector oam; 1928 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 1929 return JNIHandles::make_local(env, asd); 1930JVM_END 1931 1932// Verification //////////////////////////////////////////////////////////////////////////////// 1933 1934// Reflection for the verifier ///////////////////////////////////////////////////////////////// 1935 1936// RedefineClasses support: bug 6214132 caused verification to fail. 1937// All functions from this section should call the jvmtiThreadSate function: 1938// klassOop class_to_verify_considering_redefinition(klassOop klass). 1939// The function returns a klassOop of the _scratch_class if the verifier 1940// was invoked in the middle of the class redefinition. 1941// Otherwise it returns its argument value which is the _the_class klassOop. 1942// Please, refer to the description in the jvmtiThreadSate.hpp. 1943 1944JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 1945 JVMWrapper("JVM_GetClassNameUTF"); 1946 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1947 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1948 return Klass::cast(k)->name()->as_utf8(); 1949JVM_END 1950 1951 1952JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 1953 JVMWrapper("JVM_GetClassCPTypes"); 1954 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1955 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1956 // types will have length zero if this is not an instanceKlass 1957 // (length is determined by call to JVM_GetClassCPEntriesCount) 1958 if (Klass::cast(k)->oop_is_instance()) { 1959 constantPoolOop cp = instanceKlass::cast(k)->constants(); 1960 for (int index = cp->length() - 1; index >= 0; index--) { 1961 constantTag tag = cp->tag_at(index); 1962 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : 1963 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); 1964 } 1965 } 1966JVM_END 1967 1968 1969JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 1970 JVMWrapper("JVM_GetClassCPEntriesCount"); 1971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1972 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1973 if (!Klass::cast(k)->oop_is_instance()) 1974 return 0; 1975 return instanceKlass::cast(k)->constants()->length(); 1976JVM_END 1977 1978 1979JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 1980 JVMWrapper("JVM_GetClassFieldsCount"); 1981 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1982 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1983 if (!Klass::cast(k)->oop_is_instance()) 1984 return 0; 1985 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; 1986JVM_END 1987 1988 1989JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 1990 JVMWrapper("JVM_GetClassMethodsCount"); 1991 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1992 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1993 if (!Klass::cast(k)->oop_is_instance()) 1994 return 0; 1995 return instanceKlass::cast(k)->methods()->length(); 1996JVM_END 1997 1998 1999// The following methods, used for the verifier, are never called with 2000// array klasses, so a direct cast to instanceKlass is safe. 2001// Typically, these methods are called in a loop with bounds determined 2002// by the results of JVM_GetClass{Fields,Methods}Count, which return 2003// zero for arrays. 2004JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2005 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2006 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2007 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2008 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2009 int length = methodOop(method)->checked_exceptions_length(); 2010 if (length > 0) { 2011 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); 2012 for (int i = 0; i < length; i++) { 2013 exceptions[i] = table[i].class_cp_index; 2014 } 2015 } 2016JVM_END 2017 2018 2019JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2020 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2021 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2022 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2023 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2024 return methodOop(method)->checked_exceptions_length(); 2025JVM_END 2026 2027 2028JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2029 JVMWrapper("JVM_GetMethodIxByteCode"); 2030 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2031 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2032 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2033 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); 2034JVM_END 2035 2036 2037JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2038 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2039 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2040 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2041 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2042 return methodOop(method)->code_size(); 2043JVM_END 2044 2045 2046JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2047 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2048 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2049 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2050 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2051 typeArrayOop extable = methodOop(method)->exception_table(); 2052 entry->start_pc = extable->int_at(entry_index * 4); 2053 entry->end_pc = extable->int_at(entry_index * 4 + 1); 2054 entry->handler_pc = extable->int_at(entry_index * 4 + 2); 2055 entry->catchType = extable->int_at(entry_index * 4 + 3); 2056JVM_END 2057 2058 2059JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2060 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2061 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2062 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2063 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2064 return methodOop(method)->exception_table()->length() / 4; 2065JVM_END 2066 2067 2068JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2069 JVMWrapper("JVM_GetMethodIxModifiers"); 2070 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2071 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2072 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2073 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2074JVM_END 2075 2076 2077JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2078 JVMWrapper("JVM_GetFieldIxModifiers"); 2079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2080 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2081 typeArrayOop fields = instanceKlass::cast(k)->fields(); 2082 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2083JVM_END 2084 2085 2086JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2087 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2088 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2089 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2090 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2091 return methodOop(method)->max_locals(); 2092JVM_END 2093 2094 2095JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2096 JVMWrapper("JVM_GetMethodIxArgsSize"); 2097 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2098 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2099 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2100 return methodOop(method)->size_of_parameters(); 2101JVM_END 2102 2103 2104JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2105 JVMWrapper("JVM_GetMethodIxMaxStack"); 2106 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2107 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2108 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2109 return methodOop(method)->max_stack(); 2110JVM_END 2111 2112 2113JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2114 JVMWrapper("JVM_IsConstructorIx"); 2115 ResourceMark rm(THREAD); 2116 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2117 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2118 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2119 return methodOop(method)->name() == vmSymbols::object_initializer_name(); 2120JVM_END 2121 2122 2123JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2124 JVMWrapper("JVM_GetMethodIxIxUTF"); 2125 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2126 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2127 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2128 return methodOop(method)->name()->as_utf8(); 2129JVM_END 2130 2131 2132JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2133 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2134 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2135 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2136 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2137 return methodOop(method)->signature()->as_utf8(); 2138JVM_END 2139 2140/** 2141 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2142 * read entries in the constant pool. Since the old verifier always 2143 * works on a copy of the code, it will not see any rewriting that 2144 * may possibly occur in the middle of verification. So it is important 2145 * that nothing it calls tries to use the cpCache instead of the raw 2146 * constant pool, so we must use cp->uncached_x methods when appropriate. 2147 */ 2148JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2149 JVMWrapper("JVM_GetCPFieldNameUTF"); 2150 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2151 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2152 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2153 switch (cp->tag_at(cp_index).value()) { 2154 case JVM_CONSTANT_Fieldref: 2155 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2156 default: 2157 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2158 } 2159 ShouldNotReachHere(); 2160 return NULL; 2161JVM_END 2162 2163 2164JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2165 JVMWrapper("JVM_GetCPMethodNameUTF"); 2166 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2167 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2168 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2169 switch (cp->tag_at(cp_index).value()) { 2170 case JVM_CONSTANT_InterfaceMethodref: 2171 case JVM_CONSTANT_Methodref: 2172 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2173 default: 2174 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2175 } 2176 ShouldNotReachHere(); 2177 return NULL; 2178JVM_END 2179 2180 2181JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2182 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2183 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2184 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2185 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2186 switch (cp->tag_at(cp_index).value()) { 2187 case JVM_CONSTANT_InterfaceMethodref: 2188 case JVM_CONSTANT_Methodref: 2189 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2190 default: 2191 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2192 } 2193 ShouldNotReachHere(); 2194 return NULL; 2195JVM_END 2196 2197 2198JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2199 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2200 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2201 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2202 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2203 switch (cp->tag_at(cp_index).value()) { 2204 case JVM_CONSTANT_Fieldref: 2205 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2206 default: 2207 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2208 } 2209 ShouldNotReachHere(); 2210 return NULL; 2211JVM_END 2212 2213 2214JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2215 JVMWrapper("JVM_GetCPClassNameUTF"); 2216 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2217 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2218 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2219 symbolOop classname = cp->klass_name_at(cp_index); 2220 return classname->as_utf8(); 2221JVM_END 2222 2223 2224JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2225 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2226 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2227 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2228 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2229 switch (cp->tag_at(cp_index).value()) { 2230 case JVM_CONSTANT_Fieldref: { 2231 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2232 symbolOop classname = cp->klass_name_at(class_index); 2233 return classname->as_utf8(); 2234 } 2235 default: 2236 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2237 } 2238 ShouldNotReachHere(); 2239 return NULL; 2240JVM_END 2241 2242 2243JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2244 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2245 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2246 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2247 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2248 switch (cp->tag_at(cp_index).value()) { 2249 case JVM_CONSTANT_Methodref: 2250 case JVM_CONSTANT_InterfaceMethodref: { 2251 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2252 symbolOop classname = cp->klass_name_at(class_index); 2253 return classname->as_utf8(); 2254 } 2255 default: 2256 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2257 } 2258 ShouldNotReachHere(); 2259 return NULL; 2260JVM_END 2261 2262 2263JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2264 JVMWrapper("JVM_GetCPFieldModifiers"); 2265 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2266 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2268 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2269 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2270 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); 2271 switch (cp->tag_at(cp_index).value()) { 2272 case JVM_CONSTANT_Fieldref: { 2273 symbolOop name = cp->uncached_name_ref_at(cp_index); 2274 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2275 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); 2276 int fields_count = fields->length(); 2277 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { 2278 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && 2279 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { 2280 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2281 } 2282 } 2283 return -1; 2284 } 2285 default: 2286 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2287 } 2288 ShouldNotReachHere(); 2289 return 0; 2290JVM_END 2291 2292 2293JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2294 JVMWrapper("JVM_GetCPMethodModifiers"); 2295 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2296 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2298 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2299 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2300 switch (cp->tag_at(cp_index).value()) { 2301 case JVM_CONSTANT_Methodref: 2302 case JVM_CONSTANT_InterfaceMethodref: { 2303 symbolOop name = cp->uncached_name_ref_at(cp_index); 2304 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2305 objArrayOop methods = instanceKlass::cast(k_called)->methods(); 2306 int methods_count = methods->length(); 2307 for (int i = 0; i < methods_count; i++) { 2308 methodOop method = methodOop(methods->obj_at(i)); 2309 if (method->name() == name && method->signature() == signature) { 2310 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2311 } 2312 } 2313 return -1; 2314 } 2315 default: 2316 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2317 } 2318 ShouldNotReachHere(); 2319 return 0; 2320JVM_END 2321 2322 2323// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2324 2325JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2326 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2327JVM_END 2328 2329 2330JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2331 JVMWrapper("JVM_IsSameClassPackage"); 2332 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2333 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2334 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); 2335 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); 2336 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2337JVM_END 2338 2339 2340// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2341 2342JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2343 JVMWrapper2("JVM_Open (%s)", fname); 2344 2345 //%note jvm_r6 2346 int result = hpi::open(fname, flags, mode); 2347 if (result >= 0) { 2348 return result; 2349 } else { 2350 switch(errno) { 2351 case EEXIST: 2352 return JVM_EEXIST; 2353 default: 2354 return -1; 2355 } 2356 } 2357JVM_END 2358 2359 2360JVM_LEAF(jint, JVM_Close(jint fd)) 2361 JVMWrapper2("JVM_Close (0x%x)", fd); 2362 //%note jvm_r6 2363 return hpi::close(fd); 2364JVM_END 2365 2366 2367JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2368 JVMWrapper2("JVM_Read (0x%x)", fd); 2369 2370 //%note jvm_r6 2371 return (jint)hpi::read(fd, buf, nbytes); 2372JVM_END 2373 2374 2375JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2376 JVMWrapper2("JVM_Write (0x%x)", fd); 2377 2378 //%note jvm_r6 2379 return (jint)hpi::write(fd, buf, nbytes); 2380JVM_END 2381 2382 2383JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2384 JVMWrapper2("JVM_Available (0x%x)", fd); 2385 //%note jvm_r6 2386 return hpi::available(fd, pbytes); 2387JVM_END 2388 2389 2390JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2391 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2392 //%note jvm_r6 2393 return hpi::lseek(fd, offset, whence); 2394JVM_END 2395 2396 2397JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2398 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2399 return hpi::ftruncate(fd, length); 2400JVM_END 2401 2402 2403JVM_LEAF(jint, JVM_Sync(jint fd)) 2404 JVMWrapper2("JVM_Sync (0x%x)", fd); 2405 //%note jvm_r6 2406 return hpi::fsync(fd); 2407JVM_END 2408 2409 2410// Printing support ////////////////////////////////////////////////// 2411extern "C" { 2412 2413int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2414 // see bug 4399518, 4417214 2415 if ((intptr_t)count <= 0) return -1; 2416 return vsnprintf(str, count, fmt, args); 2417} 2418 2419 2420int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2421 va_list args; 2422 int len; 2423 va_start(args, fmt); 2424 len = jio_vsnprintf(str, count, fmt, args); 2425 va_end(args); 2426 return len; 2427} 2428 2429 2430int jio_fprintf(FILE* f, const char *fmt, ...) { 2431 int len; 2432 va_list args; 2433 va_start(args, fmt); 2434 len = jio_vfprintf(f, fmt, args); 2435 va_end(args); 2436 return len; 2437} 2438 2439 2440int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2441 if (Arguments::vfprintf_hook() != NULL) { 2442 return Arguments::vfprintf_hook()(f, fmt, args); 2443 } else { 2444 return vfprintf(f, fmt, args); 2445 } 2446} 2447 2448 2449int jio_printf(const char *fmt, ...) { 2450 int len; 2451 va_list args; 2452 va_start(args, fmt); 2453 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2454 va_end(args); 2455 return len; 2456} 2457 2458 2459// HotSpot specific jio method 2460void jio_print(const char* s) { 2461 // Try to make this function as atomic as possible. 2462 if (Arguments::vfprintf_hook() != NULL) { 2463 jio_fprintf(defaultStream::output_stream(), "%s", s); 2464 } else { 2465 ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2466 } 2467} 2468 2469} // Extern C 2470 2471// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2472 2473// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2474// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2475// OSThread objects. The exception to this rule is when the target object is the thread 2476// doing the operation, in which case we know that the thread won't exit until the 2477// operation is done (all exits being voluntary). There are a few cases where it is 2478// rather silly to do operations on yourself, like resuming yourself or asking whether 2479// you are alive. While these can still happen, they are not subject to deadlocks if 2480// the lock is held while the operation occurs (this is not the case for suspend, for 2481// instance), and are very unlikely. Because IsAlive needs to be fast and its 2482// implementation is local to this file, we always lock Threads_lock for that one. 2483 2484static void thread_entry(JavaThread* thread, TRAPS) { 2485 HandleMark hm(THREAD); 2486 Handle obj(THREAD, thread->threadObj()); 2487 JavaValue result(T_VOID); 2488 JavaCalls::call_virtual(&result, 2489 obj, 2490 KlassHandle(THREAD, SystemDictionary::thread_klass()), 2491 vmSymbolHandles::run_method_name(), 2492 vmSymbolHandles::void_method_signature(), 2493 THREAD); 2494} 2495 2496 2497JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2498 JVMWrapper("JVM_StartThread"); 2499 JavaThread *native_thread = NULL; 2500 2501 // We cannot hold the Threads_lock when we throw an exception, 2502 // due to rank ordering issues. Example: we might need to grab the 2503 // Heap_lock while we construct the exception. 2504 bool throw_illegal_thread_state = false; 2505 2506 // We must release the Threads_lock before we can post a jvmti event 2507 // in Thread::start. 2508 { 2509 // Ensure that the C++ Thread and OSThread structures aren't freed before 2510 // we operate. 2511 MutexLocker mu(Threads_lock); 2512 2513 // Check to see if we're running a thread that's already exited or was 2514 // stopped (is_stillborn) or is still active (thread is not NULL). 2515 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || 2516 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2517 throw_illegal_thread_state = true; 2518 } else { 2519 jlong size = 2520 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2521 // Allocate the C++ Thread structure and create the native thread. The 2522 // stack size retrieved from java is signed, but the constructor takes 2523 // size_t (an unsigned type), so avoid passing negative values which would 2524 // result in really large stacks. 2525 size_t sz = size > 0 ? (size_t) size : 0; 2526 native_thread = new JavaThread(&thread_entry, sz); 2527 2528 // At this point it may be possible that no osthread was created for the 2529 // JavaThread due to lack of memory. Check for this situation and throw 2530 // an exception if necessary. Eventually we may want to change this so 2531 // that we only grab the lock if the thread was created successfully - 2532 // then we can also do this check and throw the exception in the 2533 // JavaThread constructor. 2534 if (native_thread->osthread() != NULL) { 2535 // Note: the current thread is not being used within "prepare". 2536 native_thread->prepare(jthread); 2537 } 2538 } 2539 } 2540 2541 if (throw_illegal_thread_state) { 2542 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2543 } 2544 2545 assert(native_thread != NULL, "Starting null thread?"); 2546 2547 if (native_thread->osthread() == NULL) { 2548 // No one should hold a reference to the 'native_thread'. 2549 delete native_thread; 2550 if (JvmtiExport::should_post_resource_exhausted()) { 2551 JvmtiExport::post_resource_exhausted( 2552 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2553 "unable to create new native thread"); 2554 } 2555 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2556 "unable to create new native thread"); 2557 } 2558 2559 Thread::start(native_thread); 2560 2561JVM_END 2562 2563// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2564// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2565// but is thought to be reliable and simple. In the case, where the receiver is the 2566// save thread as the sender, no safepoint is needed. 2567JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2568 JVMWrapper("JVM_StopThread"); 2569 2570 oop java_throwable = JNIHandles::resolve(throwable); 2571 if (java_throwable == NULL) { 2572 THROW(vmSymbols::java_lang_NullPointerException()); 2573 } 2574 oop java_thread = JNIHandles::resolve_non_null(jthread); 2575 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2576 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); 2577 // First check if thread already exited 2578 if (receiver != NULL) { 2579 // Check if exception is getting thrown at self (use oop equality, since the 2580 // target object might exit) 2581 if (java_thread == thread->threadObj()) { 2582 // This is a change from JDK 1.1, but JDK 1.2 will also do it: 2583 // NOTE (from JDK 1.2): this is done solely to prevent stopped 2584 // threads from being restarted. 2585 // Fix for 4314342, 4145910, perhaps others: it now doesn't have 2586 // any effect on the "liveness" of a thread; see 2587 // JVM_IsThreadAlive, below. 2588 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) { 2589 java_lang_Thread::set_stillborn(java_thread); 2590 } 2591 THROW_OOP(java_throwable); 2592 } else { 2593 // Enques a VM_Operation to stop all threads and then deliver the exception... 2594 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2595 } 2596 } 2597JVM_END 2598 2599 2600JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2601 JVMWrapper("JVM_IsThreadAlive"); 2602 2603 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2604 return java_lang_Thread::is_alive(thread_oop); 2605JVM_END 2606 2607 2608JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2609 JVMWrapper("JVM_SuspendThread"); 2610 oop java_thread = JNIHandles::resolve_non_null(jthread); 2611 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2612 2613 if (receiver != NULL) { 2614 // thread has run and has not exited (still on threads list) 2615 2616 { 2617 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2618 if (receiver->is_external_suspend()) { 2619 // Don't allow nested external suspend requests. We can't return 2620 // an error from this interface so just ignore the problem. 2621 return; 2622 } 2623 if (receiver->is_exiting()) { // thread is in the process of exiting 2624 return; 2625 } 2626 receiver->set_external_suspend(); 2627 } 2628 2629 // java_suspend() will catch threads in the process of exiting 2630 // and will ignore them. 2631 receiver->java_suspend(); 2632 2633 // It would be nice to have the following assertion in all the 2634 // time, but it is possible for a racing resume request to have 2635 // resumed this thread right after we suspended it. Temporarily 2636 // enable this assertion if you are chasing a different kind of 2637 // bug. 2638 // 2639 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2640 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2641 } 2642JVM_END 2643 2644 2645JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2646 JVMWrapper("JVM_ResumeThread"); 2647 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2648 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2649 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2650 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2651 // looks at it. 2652 MutexLocker ml(Threads_lock); 2653 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2654 if (thr != NULL) { 2655 // the thread has run and is not in the process of exiting 2656 thr->java_resume(); 2657 } 2658JVM_END 2659 2660 2661JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2662 JVMWrapper("JVM_SetThreadPriority"); 2663 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2664 MutexLocker ml(Threads_lock); 2665 oop java_thread = JNIHandles::resolve_non_null(jthread); 2666 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2667 JavaThread* thr = java_lang_Thread::thread(java_thread); 2668 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2669 Thread::set_priority(thr, (ThreadPriority)prio); 2670 } 2671JVM_END 2672 2673 2674JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2675 JVMWrapper("JVM_Yield"); 2676 if (os::dont_yield()) return; 2677 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2678 // Critical for similar threading behaviour 2679 if (ConvertYieldToSleep) { 2680 os::sleep(thread, MinSleepInterval, false); 2681 } else { 2682 os::yield(); 2683 } 2684JVM_END 2685 2686 2687JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2688 JVMWrapper("JVM_Sleep"); 2689 2690 if (millis < 0) { 2691 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2692 } 2693 2694 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2695 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2696 } 2697 2698 // Save current thread state and restore it at the end of this block. 2699 // And set new thread state to SLEEPING. 2700 JavaThreadSleepState jtss(thread); 2701 2702 if (millis == 0) { 2703 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2704 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2705 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2706 // for SOLARIS 2707 if (ConvertSleepToYield) { 2708 os::yield(); 2709 } else { 2710 ThreadState old_state = thread->osthread()->get_state(); 2711 thread->osthread()->set_state(SLEEPING); 2712 os::sleep(thread, MinSleepInterval, false); 2713 thread->osthread()->set_state(old_state); 2714 } 2715 } else { 2716 ThreadState old_state = thread->osthread()->get_state(); 2717 thread->osthread()->set_state(SLEEPING); 2718 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2719 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2720 // us while we were sleeping. We do not overwrite those. 2721 if (!HAS_PENDING_EXCEPTION) { 2722 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2723 // to properly restore the thread state. That's likely wrong. 2724 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2725 } 2726 } 2727 thread->osthread()->set_state(old_state); 2728 } 2729JVM_END 2730 2731JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2732 JVMWrapper("JVM_CurrentThread"); 2733 oop jthread = thread->threadObj(); 2734 assert (thread != NULL, "no current thread!"); 2735 return JNIHandles::make_local(env, jthread); 2736JVM_END 2737 2738 2739JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2740 JVMWrapper("JVM_CountStackFrames"); 2741 2742 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2743 oop java_thread = JNIHandles::resolve_non_null(jthread); 2744 bool throw_illegal_thread_state = false; 2745 int count = 0; 2746 2747 { 2748 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2749 // We need to re-resolve the java_thread, since a GC might have happened during the 2750 // acquire of the lock 2751 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2752 2753 if (thr == NULL) { 2754 // do nothing 2755 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2756 // Check whether this java thread has been suspended already. If not, throws 2757 // IllegalThreadStateException. We defer to throw that exception until 2758 // Threads_lock is released since loading exception class has to leave VM. 2759 // The correct way to test a thread is actually suspended is 2760 // wait_for_ext_suspend_completion(), but we can't call that while holding 2761 // the Threads_lock. The above tests are sufficient for our purposes 2762 // provided the walkability of the stack is stable - which it isn't 2763 // 100% but close enough for most practical purposes. 2764 throw_illegal_thread_state = true; 2765 } else { 2766 // Count all java activation, i.e., number of vframes 2767 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2768 // Native frames are not counted 2769 if (!vfst.method()->is_native()) count++; 2770 } 2771 } 2772 } 2773 2774 if (throw_illegal_thread_state) { 2775 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2776 "this thread is not suspended"); 2777 } 2778 return count; 2779JVM_END 2780 2781// Consider: A better way to implement JVM_Interrupt() is to acquire 2782// Threads_lock to resolve the jthread into a Thread pointer, fetch 2783// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2784// drop Threads_lock, and the perform the unpark() and thr_kill() operations 2785// outside the critical section. Threads_lock is hot so we want to minimize 2786// the hold-time. A cleaner interface would be to decompose interrupt into 2787// two steps. The 1st phase, performed under Threads_lock, would return 2788// a closure that'd be invoked after Threads_lock was dropped. 2789// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2790// admit spurious wakeups. 2791 2792JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2793 JVMWrapper("JVM_Interrupt"); 2794 2795 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2796 oop java_thread = JNIHandles::resolve_non_null(jthread); 2797 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2798 // We need to re-resolve the java_thread, since a GC might have happened during the 2799 // acquire of the lock 2800 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2801 if (thr != NULL) { 2802 Thread::interrupt(thr); 2803 } 2804JVM_END 2805 2806 2807JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2808 JVMWrapper("JVM_IsInterrupted"); 2809 2810 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2811 oop java_thread = JNIHandles::resolve_non_null(jthread); 2812 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2813 // We need to re-resolve the java_thread, since a GC might have happened during the 2814 // acquire of the lock 2815 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2816 if (thr == NULL) { 2817 return JNI_FALSE; 2818 } else { 2819 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2820 } 2821JVM_END 2822 2823 2824// Return true iff the current thread has locked the object passed in 2825 2826JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 2827 JVMWrapper("JVM_HoldsLock"); 2828 assert(THREAD->is_Java_thread(), "sanity check"); 2829 if (obj == NULL) { 2830 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 2831 } 2832 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 2833 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 2834JVM_END 2835 2836 2837JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 2838 JVMWrapper("JVM_DumpAllStacks"); 2839 VM_PrintThreads op; 2840 VMThread::execute(&op); 2841 if (JvmtiExport::should_post_data_dump()) { 2842 JvmtiExport::post_data_dump(); 2843 } 2844JVM_END 2845 2846 2847// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 2848 2849static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 2850 assert(jthread->is_Java_thread(), "must be a Java thread"); 2851 if (jthread->privileged_stack_top() == NULL) return false; 2852 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 2853 oop loader = jthread->privileged_stack_top()->class_loader(); 2854 if (loader == NULL) return true; 2855 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 2856 if (trusted) return true; 2857 } 2858 return false; 2859} 2860 2861JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 2862 JVMWrapper("JVM_CurrentLoadedClass"); 2863 ResourceMark rm(THREAD); 2864 2865 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2866 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2867 bool trusted = is_trusted_frame(thread, &vfst); 2868 if (trusted) return NULL; 2869 2870 methodOop m = vfst.method(); 2871 if (!m->is_native()) { 2872 klassOop holder = m->method_holder(); 2873 oop loader = instanceKlass::cast(holder)->class_loader(); 2874 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2875 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 2876 } 2877 } 2878 } 2879 return NULL; 2880JVM_END 2881 2882 2883JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 2884 JVMWrapper("JVM_CurrentClassLoader"); 2885 ResourceMark rm(THREAD); 2886 2887 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2888 2889 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2890 bool trusted = is_trusted_frame(thread, &vfst); 2891 if (trusted) return NULL; 2892 2893 methodOop m = vfst.method(); 2894 if (!m->is_native()) { 2895 klassOop holder = m->method_holder(); 2896 assert(holder->is_klass(), "just checking"); 2897 oop loader = instanceKlass::cast(holder)->class_loader(); 2898 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2899 return JNIHandles::make_local(env, loader); 2900 } 2901 } 2902 } 2903 return NULL; 2904JVM_END 2905 2906 2907// Utility object for collecting method holders walking down the stack 2908class KlassLink: public ResourceObj { 2909 public: 2910 KlassHandle klass; 2911 KlassLink* next; 2912 2913 KlassLink(KlassHandle k) { klass = k; next = NULL; } 2914}; 2915 2916 2917JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 2918 JVMWrapper("JVM_GetClassContext"); 2919 ResourceMark rm(THREAD); 2920 JvmtiVMObjectAllocEventCollector oam; 2921 // Collect linked list of (handles to) method holders 2922 KlassLink* first = NULL; 2923 KlassLink* last = NULL; 2924 int depth = 0; 2925 2926 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 2927 // Native frames are not returned 2928 if (!vfst.method()->is_native()) { 2929 klassOop holder = vfst.method()->method_holder(); 2930 assert(holder->is_klass(), "just checking"); 2931 depth++; 2932 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 2933 if (first == NULL) { 2934 first = last = l; 2935 } else { 2936 last->next = l; 2937 last = l; 2938 } 2939 } 2940 } 2941 2942 // Create result array of type [Ljava/lang/Class; 2943 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL); 2944 // Fill in mirrors corresponding to method holders 2945 int index = 0; 2946 while (first != NULL) { 2947 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 2948 first = first->next; 2949 } 2950 assert(index == depth, "just checking"); 2951 2952 return (jobjectArray) JNIHandles::make_local(env, result); 2953JVM_END 2954 2955 2956JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 2957 JVMWrapper("JVM_ClassDepth"); 2958 ResourceMark rm(THREAD); 2959 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 2960 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 2961 2962 const char* str = java_lang_String::as_utf8_string(class_name_str()); 2963 symbolHandle class_name_sym = 2964 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); 2965 if (class_name_sym.is_null()) { 2966 return -1; 2967 } 2968 2969 int depth = 0; 2970 2971 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2972 if (!vfst.method()->is_native()) { 2973 klassOop holder = vfst.method()->method_holder(); 2974 assert(holder->is_klass(), "just checking"); 2975 if (instanceKlass::cast(holder)->name() == class_name_sym()) { 2976 return depth; 2977 } 2978 depth++; 2979 } 2980 } 2981 return -1; 2982JVM_END 2983 2984 2985JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 2986 JVMWrapper("JVM_ClassLoaderDepth"); 2987 ResourceMark rm(THREAD); 2988 int depth = 0; 2989 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2990 // if a method in a class in a trusted loader is in a doPrivileged, return -1 2991 bool trusted = is_trusted_frame(thread, &vfst); 2992 if (trusted) return -1; 2993 2994 methodOop m = vfst.method(); 2995 if (!m->is_native()) { 2996 klassOop holder = m->method_holder(); 2997 assert(holder->is_klass(), "just checking"); 2998 oop loader = instanceKlass::cast(holder)->class_loader(); 2999 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3000 return depth; 3001 } 3002 depth++; 3003 } 3004 } 3005 return -1; 3006JVM_END 3007 3008 3009// java.lang.Package //////////////////////////////////////////////////////////////// 3010 3011 3012JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3013 JVMWrapper("JVM_GetSystemPackage"); 3014 ResourceMark rm(THREAD); 3015 JvmtiVMObjectAllocEventCollector oam; 3016 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3017 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3018 return (jstring) JNIHandles::make_local(result); 3019JVM_END 3020 3021 3022JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3023 JVMWrapper("JVM_GetSystemPackages"); 3024 JvmtiVMObjectAllocEventCollector oam; 3025 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3026 return (jobjectArray) JNIHandles::make_local(result); 3027JVM_END 3028 3029 3030// ObjectInputStream /////////////////////////////////////////////////////////////// 3031 3032bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { 3033 if (current_class == NULL) { 3034 return true; 3035 } 3036 if ((current_class == field_class) || access.is_public()) { 3037 return true; 3038 } 3039 3040 if (access.is_protected()) { 3041 // See if current_class is a subclass of field_class 3042 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3043 return true; 3044 } 3045 } 3046 3047 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); 3048} 3049 3050 3051// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3052JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3053 JVMWrapper("JVM_AllocateNewObject"); 3054 JvmtiVMObjectAllocEventCollector oam; 3055 // Receiver is not used 3056 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3057 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3058 3059 // Cannot instantiate primitive types 3060 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3061 ResourceMark rm(THREAD); 3062 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3063 } 3064 3065 // Arrays not allowed here, must use JVM_AllocateNewArray 3066 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || 3067 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { 3068 ResourceMark rm(THREAD); 3069 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3070 } 3071 3072 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); 3073 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); 3074 3075 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3076 3077 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3078 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3079 3080 // Make sure klass is initialized, since we are about to instantiate one of them. 3081 curr_klass->initialize(CHECK_NULL); 3082 3083 methodHandle m (THREAD, 3084 init_klass->find_method(vmSymbols::object_initializer_name(), 3085 vmSymbols::void_method_signature())); 3086 if (m.is_null()) { 3087 ResourceMark rm(THREAD); 3088 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3089 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), 3090 vmSymbols::object_initializer_name(), 3091 vmSymbols::void_method_signature())); 3092 } 3093 3094 if (curr_klass == init_klass && !m->is_public()) { 3095 // Calling the constructor for class 'curr_klass'. 3096 // Only allow calls to a public no-arg constructor. 3097 // This path corresponds to creating an Externalizable object. 3098 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3099 } 3100 3101 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3102 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3103 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3104 } 3105 3106 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3107 // Call constructor m. This might call a constructor higher up in the hierachy 3108 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3109 3110 return JNIHandles::make_local(obj()); 3111JVM_END 3112 3113 3114JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3115 JVMWrapper("JVM_AllocateNewArray"); 3116 JvmtiVMObjectAllocEventCollector oam; 3117 oop mirror = JNIHandles::resolve_non_null(currClass); 3118 3119 if (java_lang_Class::is_primitive(mirror)) { 3120 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3121 } 3122 klassOop k = java_lang_Class::as_klassOop(mirror); 3123 oop result; 3124 3125 if (k->klass_part()->oop_is_typeArray()) { 3126 // typeArray 3127 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3128 } else if (k->klass_part()->oop_is_objArray()) { 3129 // objArray 3130 objArrayKlassHandle oak(THREAD, k); 3131 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3132 result = oak->allocate(length, CHECK_NULL); 3133 } else { 3134 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3135 } 3136 return JNIHandles::make_local(env, result); 3137JVM_END 3138 3139 3140// Return the first non-null class loader up the execution stack, or null 3141// if only code from the null class loader is on the stack. 3142 3143JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3144 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3145 // UseNewReflection 3146 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3147 klassOop holder = vfst.method()->method_holder(); 3148 oop loader = instanceKlass::cast(holder)->class_loader(); 3149 if (loader != NULL) { 3150 return JNIHandles::make_local(env, loader); 3151 } 3152 } 3153 return NULL; 3154JVM_END 3155 3156 3157// Load a class relative to the most recent class on the stack with a non-null 3158// classloader. 3159// This function has been deprecated and should not be considered part of the 3160// specified JVM interface. 3161 3162JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3163 jclass currClass, jstring currClassName)) 3164 JVMWrapper("JVM_LoadClass0"); 3165 // Receiver is not used 3166 ResourceMark rm(THREAD); 3167 3168 // Class name argument is not guaranteed to be in internal format 3169 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3170 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3171 3172 const char* str = java_lang_String::as_utf8_string(string()); 3173 3174 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { 3175 // It's impossible to create this class; the name cannot fit 3176 // into the constant pool. 3177 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3178 } 3179 3180 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); 3181 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3182 // Find the most recent class on the stack with a non-null classloader 3183 oop loader = NULL; 3184 oop protection_domain = NULL; 3185 if (curr_klass.is_null()) { 3186 for (vframeStream vfst(thread); 3187 !vfst.at_end() && loader == NULL; 3188 vfst.next()) { 3189 if (!vfst.method()->is_native()) { 3190 klassOop holder = vfst.method()->method_holder(); 3191 loader = instanceKlass::cast(holder)->class_loader(); 3192 protection_domain = instanceKlass::cast(holder)->protection_domain(); 3193 } 3194 } 3195 } else { 3196 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); 3197 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); 3198 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); 3199 } 3200 Handle h_loader(THREAD, loader); 3201 Handle h_prot (THREAD, protection_domain); 3202 return find_class_from_class_loader(env, name, true, h_loader, h_prot, 3203 false, thread); 3204JVM_END 3205 3206 3207// Array /////////////////////////////////////////////////////////////////////////////////////////// 3208 3209 3210// resolve array handle and check arguments 3211static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3212 if (arr == NULL) { 3213 THROW_0(vmSymbols::java_lang_NullPointerException()); 3214 } 3215 oop a = JNIHandles::resolve_non_null(arr); 3216 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { 3217 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3218 } 3219 return arrayOop(a); 3220} 3221 3222 3223JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3224 JVMWrapper("JVM_GetArrayLength"); 3225 arrayOop a = check_array(env, arr, false, CHECK_0); 3226 return a->length(); 3227JVM_END 3228 3229 3230JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3231 JVMWrapper("JVM_Array_Get"); 3232 JvmtiVMObjectAllocEventCollector oam; 3233 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3234 jvalue value; 3235 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3236 oop box = Reflection::box(&value, type, CHECK_NULL); 3237 return JNIHandles::make_local(env, box); 3238JVM_END 3239 3240 3241JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3242 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3243 jvalue value; 3244 value.i = 0; // to initialize value before getting used in CHECK 3245 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3246 assert(a->is_typeArray(), "just checking"); 3247 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3248 BasicType wide_type = (BasicType) wCode; 3249 if (type != wide_type) { 3250 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3251 } 3252 return value; 3253JVM_END 3254 3255 3256JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3257 JVMWrapper("JVM_SetArrayElement"); 3258 arrayOop a = check_array(env, arr, false, CHECK); 3259 oop box = JNIHandles::resolve(val); 3260 jvalue value; 3261 value.i = 0; // to initialize value before getting used in CHECK 3262 BasicType value_type; 3263 if (a->is_objArray()) { 3264 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3265 value_type = Reflection::unbox_for_regular_object(box, &value); 3266 } else { 3267 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3268 } 3269 Reflection::array_set(&value, a, index, value_type, CHECK); 3270JVM_END 3271 3272 3273JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3274 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3275 arrayOop a = check_array(env, arr, true, CHECK); 3276 assert(a->is_typeArray(), "just checking"); 3277 BasicType value_type = (BasicType) vCode; 3278 Reflection::array_set(&v, a, index, value_type, CHECK); 3279JVM_END 3280 3281 3282JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3283 JVMWrapper("JVM_NewArray"); 3284 JvmtiVMObjectAllocEventCollector oam; 3285 oop element_mirror = JNIHandles::resolve(eltClass); 3286 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3287 return JNIHandles::make_local(env, result); 3288JVM_END 3289 3290 3291JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3292 JVMWrapper("JVM_NewMultiArray"); 3293 JvmtiVMObjectAllocEventCollector oam; 3294 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3295 oop element_mirror = JNIHandles::resolve(eltClass); 3296 assert(dim_array->is_typeArray(), "just checking"); 3297 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3298 return JNIHandles::make_local(env, result); 3299JVM_END 3300 3301 3302// Networking library support //////////////////////////////////////////////////////////////////// 3303 3304JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3305 JVMWrapper("JVM_InitializeSocketLibrary"); 3306 return hpi::initialize_socket_library(); 3307JVM_END 3308 3309 3310JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3311 JVMWrapper("JVM_Socket"); 3312 return hpi::socket(domain, type, protocol); 3313JVM_END 3314 3315 3316JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3317 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3318 //%note jvm_r6 3319 return hpi::socket_close(fd); 3320JVM_END 3321 3322 3323JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3324 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3325 //%note jvm_r6 3326 return hpi::socket_shutdown(fd, howto); 3327JVM_END 3328 3329 3330JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3331 JVMWrapper2("JVM_Recv (0x%x)", fd); 3332 //%note jvm_r6 3333 return hpi::recv(fd, buf, nBytes, flags); 3334JVM_END 3335 3336 3337JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3338 JVMWrapper2("JVM_Send (0x%x)", fd); 3339 //%note jvm_r6 3340 return hpi::send(fd, buf, nBytes, flags); 3341JVM_END 3342 3343 3344JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3345 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3346 //%note jvm_r6 3347 return hpi::timeout(fd, timeout); 3348JVM_END 3349 3350 3351JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3352 JVMWrapper2("JVM_Listen (0x%x)", fd); 3353 //%note jvm_r6 3354 return hpi::listen(fd, count); 3355JVM_END 3356 3357 3358JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3359 JVMWrapper2("JVM_Connect (0x%x)", fd); 3360 //%note jvm_r6 3361 return hpi::connect(fd, him, len); 3362JVM_END 3363 3364 3365JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3366 JVMWrapper2("JVM_Bind (0x%x)", fd); 3367 //%note jvm_r6 3368 return hpi::bind(fd, him, len); 3369JVM_END 3370 3371 3372JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3373 JVMWrapper2("JVM_Accept (0x%x)", fd); 3374 //%note jvm_r6 3375 return hpi::accept(fd, him, (int *)len); 3376JVM_END 3377 3378 3379JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3380 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3381 //%note jvm_r6 3382 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); 3383JVM_END 3384 3385 3386JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3387 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3388 //%note jvm_r6 3389 return hpi::get_sock_name(fd, him, len); 3390JVM_END 3391 3392 3393JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3394 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3395 //%note jvm_r6 3396 return hpi::sendto(fd, buf, len, flags, to, tolen); 3397JVM_END 3398 3399 3400JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3401 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3402 //%note jvm_r6 3403 return hpi::socket_available(fd, pbytes); 3404JVM_END 3405 3406 3407JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3408 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3409 //%note jvm_r6 3410 return hpi::get_sock_opt(fd, level, optname, optval, optlen); 3411JVM_END 3412 3413 3414JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3415 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3416 //%note jvm_r6 3417 return hpi::set_sock_opt(fd, level, optname, optval, optlen); 3418JVM_END 3419 3420JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3421 JVMWrapper("JVM_GetHostName"); 3422 return hpi::get_host_name(name, namelen); 3423JVM_END 3424 3425#ifdef _WINDOWS 3426 3427JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) 3428 JVMWrapper("JVM_GetHostByAddr"); 3429 return hpi::get_host_by_addr(name, len, type); 3430JVM_END 3431 3432 3433JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) 3434 JVMWrapper("JVM_GetHostByName"); 3435 return hpi::get_host_by_name(name); 3436JVM_END 3437 3438 3439JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) 3440 JVMWrapper("JVM_GetProtoByName"); 3441 return hpi::get_proto_by_name(name); 3442JVM_END 3443 3444#endif 3445 3446// Library support /////////////////////////////////////////////////////////////////////////// 3447 3448JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3449 //%note jvm_ct 3450 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3451 char ebuf[1024]; 3452 void *load_result; 3453 { 3454 ThreadToNativeFromVM ttnfvm(thread); 3455 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); 3456 } 3457 if (load_result == NULL) { 3458 char msg[1024]; 3459 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3460 // Since 'ebuf' may contain a string encoded using 3461 // platform encoding scheme, we need to pass 3462 // Exceptions::unsafe_to_utf8 to the new_exception method 3463 // as the last argument. See bug 6367357. 3464 Handle h_exception = 3465 Exceptions::new_exception(thread, 3466 vmSymbols::java_lang_UnsatisfiedLinkError(), 3467 msg, Exceptions::unsafe_to_utf8); 3468 3469 THROW_HANDLE_0(h_exception); 3470 } 3471 return load_result; 3472JVM_END 3473 3474 3475JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3476 JVMWrapper("JVM_UnloadLibrary"); 3477 hpi::dll_unload(handle); 3478JVM_END 3479 3480 3481JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3482 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3483 return hpi::dll_lookup(handle, name); 3484JVM_END 3485 3486// Floating point support //////////////////////////////////////////////////////////////////// 3487 3488JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3489 JVMWrapper("JVM_IsNaN"); 3490 return g_isnan(a); 3491JVM_END 3492 3493 3494 3495// JNI version /////////////////////////////////////////////////////////////////////////////// 3496 3497JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3498 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3499 return Threads::is_supported_jni_version_including_1_1(version); 3500JVM_END 3501 3502 3503// String support /////////////////////////////////////////////////////////////////////////// 3504 3505JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3506 JVMWrapper("JVM_InternString"); 3507 JvmtiVMObjectAllocEventCollector oam; 3508 if (str == NULL) return NULL; 3509 oop string = JNIHandles::resolve_non_null(str); 3510 oop result = StringTable::intern(string, CHECK_NULL); 3511 return (jstring) JNIHandles::make_local(env, result); 3512JVM_END 3513 3514 3515// Raw monitor support ////////////////////////////////////////////////////////////////////// 3516 3517// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3518// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3519// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3520// that only works with java threads. 3521 3522 3523JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3524 VM_Exit::block_if_vm_exited(); 3525 JVMWrapper("JVM_RawMonitorCreate"); 3526 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3527} 3528 3529 3530JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3531 VM_Exit::block_if_vm_exited(); 3532 JVMWrapper("JVM_RawMonitorDestroy"); 3533 delete ((Mutex*) mon); 3534} 3535 3536 3537JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3538 VM_Exit::block_if_vm_exited(); 3539 JVMWrapper("JVM_RawMonitorEnter"); 3540 ((Mutex*) mon)->jvm_raw_lock(); 3541 return 0; 3542} 3543 3544 3545JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3546 VM_Exit::block_if_vm_exited(); 3547 JVMWrapper("JVM_RawMonitorExit"); 3548 ((Mutex*) mon)->jvm_raw_unlock(); 3549} 3550 3551 3552// Support for Serialization 3553 3554typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3555typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3556typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3557typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3558 3559static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3560static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3561static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3562static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3563 3564 3565void initialize_converter_functions() { 3566 if (JDK_Version::is_gte_jdk14x_version()) { 3567 // These functions only exist for compatibility with 1.3.1 and earlier 3568 return; 3569 } 3570 3571 // called from universe_post_init() 3572 assert( 3573 int_bits_to_float_fn == NULL && 3574 long_bits_to_double_fn == NULL && 3575 float_to_int_bits_fn == NULL && 3576 double_to_long_bits_fn == NULL , 3577 "initialization done twice" 3578 ); 3579 // initialize 3580 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3581 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3582 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3583 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3584 // verify 3585 assert( 3586 int_bits_to_float_fn != NULL && 3587 long_bits_to_double_fn != NULL && 3588 float_to_int_bits_fn != NULL && 3589 double_to_long_bits_fn != NULL , 3590 "initialization failed" 3591 ); 3592} 3593 3594 3595// Serialization 3596JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3597 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3598 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3599 3600 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3601 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3602 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3603 oop o = JNIHandles::resolve(obj); 3604 3605 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3606 THROW(vmSymbols::java_lang_NullPointerException()); 3607 } 3608 3609 jsize nfids = fids->length(); 3610 if (nfids == 0) return; 3611 3612 if (tcodes->length() < nfids) { 3613 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3614 } 3615 3616 jsize off = 0; 3617 /* loop through fields, setting values */ 3618 for (jsize i = 0; i < nfids; i++) { 3619 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3620 int field_offset; 3621 if (fid != NULL) { 3622 // NULL is a legal value for fid, but retrieving the field offset 3623 // trigger assertion in that case 3624 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3625 } 3626 3627 switch (tcodes->char_at(i)) { 3628 case 'Z': 3629 if (fid != NULL) { 3630 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3631 o->bool_field_put(field_offset, val); 3632 } 3633 off++; 3634 break; 3635 3636 case 'B': 3637 if (fid != NULL) { 3638 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3639 } 3640 off++; 3641 break; 3642 3643 case 'C': 3644 if (fid != NULL) { 3645 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3646 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3647 o->char_field_put(field_offset, val); 3648 } 3649 off += 2; 3650 break; 3651 3652 case 'S': 3653 if (fid != NULL) { 3654 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3655 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3656 o->short_field_put(field_offset, val); 3657 } 3658 off += 2; 3659 break; 3660 3661 case 'I': 3662 if (fid != NULL) { 3663 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3664 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3665 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3666 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3667 o->int_field_put(field_offset, ival); 3668 } 3669 off += 4; 3670 break; 3671 3672 case 'F': 3673 if (fid != NULL) { 3674 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3675 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3676 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3677 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3678 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3679 o->float_field_put(field_offset, fval); 3680 } 3681 off += 4; 3682 break; 3683 3684 case 'J': 3685 if (fid != NULL) { 3686 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3687 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3688 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3689 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3690 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3691 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3692 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3693 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3694 o->long_field_put(field_offset, lval); 3695 } 3696 off += 8; 3697 break; 3698 3699 case 'D': 3700 if (fid != NULL) { 3701 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3702 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3703 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3704 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3705 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3706 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3707 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3708 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3709 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3710 o->double_field_put(field_offset, dval); 3711 } 3712 off += 8; 3713 break; 3714 3715 default: 3716 // Illegal typecode 3717 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3718 } 3719 } 3720JVM_END 3721 3722 3723JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3724 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3725 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3726 3727 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3728 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3729 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3730 oop o = JNIHandles::resolve(obj); 3731 3732 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3733 THROW(vmSymbols::java_lang_NullPointerException()); 3734 } 3735 3736 jsize nfids = fids->length(); 3737 if (nfids == 0) return; 3738 3739 if (tcodes->length() < nfids) { 3740 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3741 } 3742 3743 /* loop through fields, fetching values */ 3744 jsize off = 0; 3745 for (jsize i = 0; i < nfids; i++) { 3746 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3747 if (fid == NULL) { 3748 THROW(vmSymbols::java_lang_NullPointerException()); 3749 } 3750 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3751 3752 switch (tcodes->char_at(i)) { 3753 case 'Z': 3754 { 3755 jboolean val = o->bool_field(field_offset); 3756 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3757 } 3758 break; 3759 3760 case 'B': 3761 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3762 break; 3763 3764 case 'C': 3765 { 3766 jchar val = o->char_field(field_offset); 3767 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3768 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3769 } 3770 break; 3771 3772 case 'S': 3773 { 3774 jshort val = o->short_field(field_offset); 3775 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3776 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3777 } 3778 break; 3779 3780 case 'I': 3781 { 3782 jint val = o->int_field(field_offset); 3783 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3784 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3785 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3786 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3787 } 3788 break; 3789 3790 case 'F': 3791 { 3792 jfloat fval = o->float_field(field_offset); 3793 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3794 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3795 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3796 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3797 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3798 } 3799 break; 3800 3801 case 'J': 3802 { 3803 jlong val = o->long_field(field_offset); 3804 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 3805 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 3806 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 3807 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 3808 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3809 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3810 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3811 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3812 } 3813 break; 3814 3815 case 'D': 3816 { 3817 jdouble dval = o->double_field(field_offset); 3818 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 3819 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 3820 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 3821 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 3822 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 3823 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 3824 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 3825 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 3826 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 3827 } 3828 break; 3829 3830 default: 3831 // Illegal typecode 3832 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3833 } 3834 } 3835JVM_END 3836 3837 3838// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3839 3840jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3841 // Security Note: 3842 // The Java level wrapper will perform the necessary security check allowing 3843 // us to pass the NULL as the initiating class loader. 3844 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3845 KlassHandle klass_handle(THREAD, klass); 3846 // Check if we should initialize the class 3847 if (init && klass_handle->oop_is_instance()) { 3848 klass_handle->initialize(CHECK_NULL); 3849 } 3850 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3851} 3852 3853 3854// Internal SQE debugging support /////////////////////////////////////////////////////////// 3855 3856#ifndef PRODUCT 3857 3858extern "C" { 3859 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 3860 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 3861 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 3862} 3863 3864JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 3865 JVMWrapper("JVM_AccessBoolVMFlag"); 3866 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 3867JVM_END 3868 3869JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 3870 JVMWrapper("JVM_AccessVMIntFlag"); 3871 intx v; 3872 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 3873 *value = (jint)v; 3874 return result; 3875JVM_END 3876 3877 3878JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 3879 JVMWrapper("JVM_VMBreakPoint"); 3880 oop the_obj = JNIHandles::resolve(obj); 3881 BREAKPOINT; 3882JVM_END 3883 3884 3885#endif 3886 3887 3888//--------------------------------------------------------------------------- 3889// 3890// Support for old native code-based reflection (pre-JDK 1.4) 3891// Disabled by default in the product build. 3892// 3893// See reflection.hpp for information on SUPPORT_OLD_REFLECTION 3894// 3895//--------------------------------------------------------------------------- 3896 3897#ifdef SUPPORT_OLD_REFLECTION 3898 3899JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) 3900 JVMWrapper("JVM_GetClassFields"); 3901 JvmtiVMObjectAllocEventCollector oam; 3902 oop mirror = JNIHandles::resolve_non_null(cls); 3903 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); 3904 return (jobjectArray) JNIHandles::make_local(env, result); 3905JVM_END 3906 3907 3908JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) 3909 JVMWrapper("JVM_GetClassMethods"); 3910 JvmtiVMObjectAllocEventCollector oam; 3911 oop mirror = JNIHandles::resolve_non_null(cls); 3912 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); 3913 //%note jvm_r4 3914 return (jobjectArray) JNIHandles::make_local(env, result); 3915JVM_END 3916 3917 3918JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) 3919 JVMWrapper("JVM_GetClassConstructors"); 3920 JvmtiVMObjectAllocEventCollector oam; 3921 oop mirror = JNIHandles::resolve_non_null(cls); 3922 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); 3923 //%note jvm_r4 3924 return (jobjectArray) JNIHandles::make_local(env, result); 3925JVM_END 3926 3927 3928JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) 3929 JVMWrapper("JVM_GetClassField"); 3930 JvmtiVMObjectAllocEventCollector oam; 3931 if (name == NULL) return NULL; 3932 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 3933 3934 const char* cstr = java_lang_String::as_utf8_string(str()); 3935 symbolHandle field_name = 3936 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 3937 if (field_name.is_null()) { 3938 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 3939 } 3940 3941 oop mirror = JNIHandles::resolve_non_null(cls); 3942 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); 3943 if (result == NULL) { 3944 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 3945 } 3946 return JNIHandles::make_local(env, result); 3947JVM_END 3948 3949 3950JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) 3951 JVMWrapper("JVM_GetClassMethod"); 3952 JvmtiVMObjectAllocEventCollector oam; 3953 if (name == NULL) { 3954 THROW_0(vmSymbols::java_lang_NullPointerException()); 3955 } 3956 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 3957 3958 const char* cstr = java_lang_String::as_utf8_string(str()); 3959 symbolHandle method_name = 3960 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 3961 if (method_name.is_null()) { 3962 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3963 } 3964 3965 oop mirror = JNIHandles::resolve_non_null(cls); 3966 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 3967 oop result = Reflection::reflect_method(mirror, method_name, tarray, 3968 which, CHECK_NULL); 3969 if (result == NULL) { 3970 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3971 } 3972 return JNIHandles::make_local(env, result); 3973JVM_END 3974 3975 3976JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) 3977 JVMWrapper("JVM_GetClassConstructor"); 3978 JvmtiVMObjectAllocEventCollector oam; 3979 oop mirror = JNIHandles::resolve_non_null(cls); 3980 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 3981 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); 3982 if (result == NULL) { 3983 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3984 } 3985 return (jobject) JNIHandles::make_local(env, result); 3986JVM_END 3987 3988 3989// Instantiation /////////////////////////////////////////////////////////////////////////////// 3990 3991JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) 3992 JVMWrapper("JVM_NewInstance"); 3993 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); 3994 3995 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); 3996 if (resolved_constructor == NULL) { 3997 klassOop k = java_lang_Class::as_klassOop(mirror()); 3998 // The java.lang.Class object caches a resolved constructor if all the checks 3999 // below were done successfully and a constructor was found. 4000 4001 // Do class based checks 4002 if (java_lang_Class::is_primitive(mirror())) { 4003 const char* msg = ""; 4004 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; 4005 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; 4006 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; 4007 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; 4008 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; 4009 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; 4010 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; 4011 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; 4012 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); 4013 } 4014 4015 // Check whether we are allowed to instantiate this class 4016 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here 4017 instanceKlassHandle klass(THREAD, k); 4018 // Make sure class is initialized (also so all methods are rewritten) 4019 klass->initialize(CHECK_NULL); 4020 4021 // Lookup default constructor 4022 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); 4023 if (resolved_constructor == NULL) { 4024 ResourceMark rm(THREAD); 4025 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); 4026 } 4027 4028 // Cache result in java.lang.Class object. Does not have to be MT safe. 4029 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); 4030 } 4031 4032 assert(resolved_constructor != NULL, "sanity check"); 4033 methodHandle constructor = methodHandle(THREAD, resolved_constructor); 4034 4035 // We have an initialized instanceKlass with a default constructor 4036 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 4037 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); 4038 4039 // Do security check 4040 klassOop caller_klass = NULL; 4041 if (UsePrivilegedStack) { 4042 caller_klass = thread->security_get_caller_class(2); 4043 4044 if (!Reflection::verify_class_access(caller_klass, klass(), false) || 4045 !Reflection::verify_field_access(caller_klass, 4046 klass(), 4047 klass(), 4048 constructor->access_flags(), 4049 false, 4050 true)) { 4051 ResourceMark rm(THREAD); 4052 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); 4053 } 4054 } 4055 4056 // Allocate object and call constructor 4057 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 4058 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); 4059 4060 jobject res = JNIHandles::make_local(env, receiver()); 4061 if (JvmtiExport::should_post_vm_object_alloc()) { 4062 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); 4063 } 4064 return res; 4065JVM_END 4066 4067 4068// Field //////////////////////////////////////////////////////////////////////////////////////////// 4069 4070JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) 4071 JVMWrapper("JVM_GetField"); 4072 JvmtiVMObjectAllocEventCollector oam; 4073 Handle field_mirror(thread, JNIHandles::resolve(field)); 4074 Handle receiver (thread, JNIHandles::resolve(obj)); 4075 fieldDescriptor fd; 4076 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); 4077 jvalue value; 4078 BasicType type = Reflection::field_get(&value, &fd, receiver); 4079 oop box = Reflection::box(&value, type, CHECK_NULL); 4080 return JNIHandles::make_local(env, box); 4081JVM_END 4082 4083 4084JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) 4085 JVMWrapper("JVM_GetPrimitiveField"); 4086 Handle field_mirror(thread, JNIHandles::resolve(field)); 4087 Handle receiver (thread, JNIHandles::resolve(obj)); 4088 fieldDescriptor fd; 4089 jvalue value; 4090 value.j = 0; 4091 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); 4092 BasicType type = Reflection::field_get(&value, &fd, receiver); 4093 BasicType wide_type = (BasicType) wCode; 4094 if (type != wide_type) { 4095 Reflection::widen(&value, type, wide_type, CHECK_(value)); 4096 } 4097 return value; 4098JVM_END // should really be JVM_END, but that doesn't work for union types! 4099 4100 4101JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) 4102 JVMWrapper("JVM_SetField"); 4103 Handle field_mirror(thread, JNIHandles::resolve(field)); 4104 Handle receiver (thread, JNIHandles::resolve(obj)); 4105 oop box = JNIHandles::resolve(val); 4106 fieldDescriptor fd; 4107 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4108 BasicType field_type = fd.field_type(); 4109 jvalue value; 4110 BasicType value_type; 4111 if (field_type == T_OBJECT || field_type == T_ARRAY) { 4112 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 4113 value_type = Reflection::unbox_for_regular_object(box, &value); 4114 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); 4115 } else { 4116 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 4117 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); 4118 } 4119JVM_END 4120 4121 4122JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) 4123 JVMWrapper("JVM_SetPrimitiveField"); 4124 Handle field_mirror(thread, JNIHandles::resolve(field)); 4125 Handle receiver (thread, JNIHandles::resolve(obj)); 4126 fieldDescriptor fd; 4127 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4128 BasicType value_type = (BasicType) vCode; 4129 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); 4130JVM_END 4131 4132 4133// Method /////////////////////////////////////////////////////////////////////////////////////////// 4134 4135JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4136 JVMWrapper("JVM_InvokeMethod"); 4137 Handle method_handle; 4138 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4139 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4140 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4141 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4142 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4143 jobject res = JNIHandles::make_local(env, result); 4144 if (JvmtiExport::should_post_vm_object_alloc()) { 4145 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4146 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4147 if (java_lang_Class::is_primitive(ret_type)) { 4148 // Only for primitive type vm allocates memory for java object. 4149 // See box() method. 4150 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4151 } 4152 } 4153 return res; 4154 } else { 4155 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4156 } 4157JVM_END 4158 4159 4160JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4161 JVMWrapper("JVM_NewInstanceFromConstructor"); 4162 oop constructor_mirror = JNIHandles::resolve(c); 4163 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4164 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4165 jobject res = JNIHandles::make_local(env, result); 4166 if (JvmtiExport::should_post_vm_object_alloc()) { 4167 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4168 } 4169 return res; 4170JVM_END 4171 4172#endif /* SUPPORT_OLD_REFLECTION */ 4173 4174// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4175 4176JVM_LEAF(jboolean, JVM_SupportsCX8()) 4177 JVMWrapper("JVM_SupportsCX8"); 4178 return VM_Version::supports_cx8(); 4179JVM_END 4180 4181 4182JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4183 JVMWrapper("JVM_CX8Field"); 4184 jlong res; 4185 oop o = JNIHandles::resolve(obj); 4186 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4187 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4188 4189 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4190 res = Atomic::cmpxchg(newVal, addr, oldVal); 4191 4192 return res == oldVal; 4193JVM_END 4194 4195// DTrace /////////////////////////////////////////////////////////////////// 4196 4197JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4198 JVMWrapper("JVM_DTraceGetVersion"); 4199 return (jint)JVM_TRACING_DTRACE_VERSION; 4200JVM_END 4201 4202JVM_ENTRY(jlong,JVM_DTraceActivate( 4203 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4204 JVM_DTraceProvider* providers)) 4205 JVMWrapper("JVM_DTraceActivate"); 4206 return DTraceJSDT::activate( 4207 version, module_name, providers_count, providers, CHECK_0); 4208JVM_END 4209 4210JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4211 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4212 return DTraceJSDT::is_probe_enabled(method); 4213JVM_END 4214 4215JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4216 JVMWrapper("JVM_DTraceDispose"); 4217 DTraceJSDT::dispose(handle); 4218JVM_END 4219 4220JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4221 JVMWrapper("JVM_DTraceIsSupported"); 4222 return DTraceJSDT::is_supported(); 4223JVM_END 4224 4225// Returns an array of all live Thread objects (VM internal JavaThreads, 4226// jvmti agent threads, and JNI attaching threads are skipped) 4227// See CR 6404306 regarding JNI attaching threads 4228JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4229 ResourceMark rm(THREAD); 4230 ThreadsListEnumerator tle(THREAD, false, false); 4231 JvmtiVMObjectAllocEventCollector oam; 4232 4233 int num_threads = tle.num_threads(); 4234 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL); 4235 objArrayHandle threads_ah(THREAD, r); 4236 4237 for (int i = 0; i < num_threads; i++) { 4238 Handle h = tle.get_threadObj(i); 4239 threads_ah->obj_at_put(i, h()); 4240 } 4241 4242 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4243JVM_END 4244 4245 4246// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4247// Return StackTraceElement[][], each element is the stack trace of a thread in 4248// the corresponding entry in the given threads array 4249JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4250 JVMWrapper("JVM_DumpThreads"); 4251 JvmtiVMObjectAllocEventCollector oam; 4252 4253 // Check if threads is null 4254 if (threads == NULL) { 4255 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4256 } 4257 4258 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4259 objArrayHandle ah(THREAD, a); 4260 int num_threads = ah->length(); 4261 // check if threads is non-empty array 4262 if (num_threads == 0) { 4263 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4264 } 4265 4266 // check if threads is not an array of objects of Thread class 4267 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); 4268 if (k != SystemDictionary::thread_klass()) { 4269 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4270 } 4271 4272 ResourceMark rm(THREAD); 4273 4274 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4275 for (int i = 0; i < num_threads; i++) { 4276 oop thread_obj = ah->obj_at(i); 4277 instanceHandle h(THREAD, (instanceOop) thread_obj); 4278 thread_handle_array->append(h); 4279 } 4280 4281 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4282 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4283 4284JVM_END 4285 4286// JVM monitoring and management support 4287JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4288 return Management::get_jmm_interface(version); 4289JVM_END 4290 4291// com.sun.tools.attach.VirtualMachine agent properties support 4292// 4293// Initialize the agent properties with the properties maintained in the VM 4294JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4295 JVMWrapper("JVM_InitAgentProperties"); 4296 ResourceMark rm; 4297 4298 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4299 4300 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4301 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4302 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4303 return properties; 4304JVM_END 4305 4306JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4307{ 4308 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4309 JvmtiVMObjectAllocEventCollector oam; 4310 4311 if (ofClass == NULL) { 4312 return NULL; 4313 } 4314 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4315 // Special handling for primitive objects 4316 if (java_lang_Class::is_primitive(mirror())) { 4317 return NULL; 4318 } 4319 klassOop k = java_lang_Class::as_klassOop(mirror()); 4320 if (!Klass::cast(k)->oop_is_instance()) { 4321 return NULL; 4322 } 4323 instanceKlassHandle ik_h(THREAD, k); 4324 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4325 if (encl_method_class_idx == 0) { 4326 return NULL; 4327 } 4328 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL); 4329 objArrayHandle dest(THREAD, dest_o); 4330 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4331 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4332 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4333 if (encl_method_method_idx != 0) { 4334 symbolOop sym_o = ik_h->constants()->symbol_at( 4335 extract_low_short_from_int( 4336 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4337 symbolHandle sym(THREAD, sym_o); 4338 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4339 dest->obj_at_put(1, str()); 4340 sym_o = ik_h->constants()->symbol_at( 4341 extract_high_short_from_int( 4342 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4343 sym = symbolHandle(THREAD, sym_o); 4344 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4345 dest->obj_at_put(2, str()); 4346 } 4347 return (jobjectArray) JNIHandles::make_local(dest()); 4348} 4349JVM_END 4350 4351JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4352 jint javaThreadState)) 4353{ 4354 // If new thread states are added in future JDK and VM versions, 4355 // this should check if the JDK version is compatible with thread 4356 // states supported by the VM. Return NULL if not compatible. 4357 // 4358 // This function must map the VM java_lang_Thread::ThreadStatus 4359 // to the Java thread state that the JDK supports. 4360 // 4361 4362 typeArrayHandle values_h; 4363 switch (javaThreadState) { 4364 case JAVA_THREAD_STATE_NEW : { 4365 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4366 values_h = typeArrayHandle(THREAD, r); 4367 values_h->int_at_put(0, java_lang_Thread::NEW); 4368 break; 4369 } 4370 case JAVA_THREAD_STATE_RUNNABLE : { 4371 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4372 values_h = typeArrayHandle(THREAD, r); 4373 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4374 break; 4375 } 4376 case JAVA_THREAD_STATE_BLOCKED : { 4377 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4378 values_h = typeArrayHandle(THREAD, r); 4379 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4380 break; 4381 } 4382 case JAVA_THREAD_STATE_WAITING : { 4383 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4384 values_h = typeArrayHandle(THREAD, r); 4385 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4386 values_h->int_at_put(1, java_lang_Thread::PARKED); 4387 break; 4388 } 4389 case JAVA_THREAD_STATE_TIMED_WAITING : { 4390 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4391 values_h = typeArrayHandle(THREAD, r); 4392 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4393 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4394 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4395 break; 4396 } 4397 case JAVA_THREAD_STATE_TERMINATED : { 4398 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4399 values_h = typeArrayHandle(THREAD, r); 4400 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4401 break; 4402 } 4403 default: 4404 // Unknown state - probably incompatible JDK version 4405 return NULL; 4406 } 4407 4408 return (jintArray) JNIHandles::make_local(env, values_h()); 4409} 4410JVM_END 4411 4412 4413JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4414 jint javaThreadState, 4415 jintArray values)) 4416{ 4417 // If new thread states are added in future JDK and VM versions, 4418 // this should check if the JDK version is compatible with thread 4419 // states supported by the VM. Return NULL if not compatible. 4420 // 4421 // This function must map the VM java_lang_Thread::ThreadStatus 4422 // to the Java thread state that the JDK supports. 4423 // 4424 4425 ResourceMark rm; 4426 4427 // Check if threads is null 4428 if (values == NULL) { 4429 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4430 } 4431 4432 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4433 typeArrayHandle values_h(THREAD, v); 4434 4435 objArrayHandle names_h; 4436 switch (javaThreadState) { 4437 case JAVA_THREAD_STATE_NEW : { 4438 assert(values_h->length() == 1 && 4439 values_h->int_at(0) == java_lang_Thread::NEW, 4440 "Invalid threadStatus value"); 4441 4442 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4443 1, /* only 1 substate */ 4444 CHECK_NULL); 4445 names_h = objArrayHandle(THREAD, r); 4446 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4447 names_h->obj_at_put(0, name()); 4448 break; 4449 } 4450 case JAVA_THREAD_STATE_RUNNABLE : { 4451 assert(values_h->length() == 1 && 4452 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4453 "Invalid threadStatus value"); 4454 4455 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4456 1, /* only 1 substate */ 4457 CHECK_NULL); 4458 names_h = objArrayHandle(THREAD, r); 4459 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4460 names_h->obj_at_put(0, name()); 4461 break; 4462 } 4463 case JAVA_THREAD_STATE_BLOCKED : { 4464 assert(values_h->length() == 1 && 4465 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4466 "Invalid threadStatus value"); 4467 4468 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4469 1, /* only 1 substate */ 4470 CHECK_NULL); 4471 names_h = objArrayHandle(THREAD, r); 4472 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4473 names_h->obj_at_put(0, name()); 4474 break; 4475 } 4476 case JAVA_THREAD_STATE_WAITING : { 4477 assert(values_h->length() == 2 && 4478 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4479 values_h->int_at(1) == java_lang_Thread::PARKED, 4480 "Invalid threadStatus value"); 4481 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4482 2, /* number of substates */ 4483 CHECK_NULL); 4484 names_h = objArrayHandle(THREAD, r); 4485 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4486 CHECK_NULL); 4487 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4488 CHECK_NULL); 4489 names_h->obj_at_put(0, name0()); 4490 names_h->obj_at_put(1, name1()); 4491 break; 4492 } 4493 case JAVA_THREAD_STATE_TIMED_WAITING : { 4494 assert(values_h->length() == 3 && 4495 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4496 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4497 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4498 "Invalid threadStatus value"); 4499 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4500 3, /* number of substates */ 4501 CHECK_NULL); 4502 names_h = objArrayHandle(THREAD, r); 4503 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4504 CHECK_NULL); 4505 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4506 CHECK_NULL); 4507 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4508 CHECK_NULL); 4509 names_h->obj_at_put(0, name0()); 4510 names_h->obj_at_put(1, name1()); 4511 names_h->obj_at_put(2, name2()); 4512 break; 4513 } 4514 case JAVA_THREAD_STATE_TERMINATED : { 4515 assert(values_h->length() == 1 && 4516 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4517 "Invalid threadStatus value"); 4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4519 1, /* only 1 substate */ 4520 CHECK_NULL); 4521 names_h = objArrayHandle(THREAD, r); 4522 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4523 names_h->obj_at_put(0, name()); 4524 break; 4525 } 4526 default: 4527 // Unknown state - probably incompatible JDK version 4528 return NULL; 4529 } 4530 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4531} 4532JVM_END 4533 4534JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4535{ 4536 memset(info, 0, sizeof(info_size)); 4537 4538 info->jvm_version = Abstract_VM_Version::jvm_version(); 4539 info->update_version = 0; /* 0 in HotSpot Express VM */ 4540 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4541 4542 // when we add a new capability in the jvm_version_info struct, we should also 4543 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4544 // counter defined in runtimeService.cpp. 4545 info->is_attachable = AttachListener::is_attach_supported(); 4546#ifdef KERNEL 4547 info->is_kernel_jvm = 1; // true; 4548#else // KERNEL 4549 info->is_kernel_jvm = 0; // false; 4550#endif // KERNEL 4551} 4552JVM_END 4553 4554