1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classLoader.hpp" 27 #include "classfile/javaAssertions.hpp" 28 #include "classfile/javaClasses.hpp" 29 #include "classfile/symbolTable.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "gc_interface/collectedHeap.inline.hpp" 33 #include "interpreter/bytecode.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/objArrayKlass.hpp" 39 #include "oops/method.hpp" 40 #include "prims/jvm.h" 41 #include "prims/jvm_misc.hpp" 42 #include "prims/jvmtiExport.hpp" 43 #include "prims/jvmtiThreadState.hpp" 44 #include "prims/nativeLookup.hpp" 45 #include "prims/privilegedStack.hpp" 46 #include "runtime/arguments.hpp" 47 #include "runtime/dtraceJSDT.hpp" 48 #include "runtime/handles.inline.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/javaCalls.hpp" 53 #include "runtime/jfieldIDWorkaround.hpp" 54 #include "runtime/os.hpp" 55 #include "runtime/perfData.hpp" 56 #include "runtime/reflection.hpp" 57 #include "runtime/vframe.hpp" 58 #include "runtime/vm_operations.hpp" 59 #include "services/attachListener.hpp" 60 #include "services/management.hpp" 61 #include "services/threadService.hpp" 62 #include "utilities/copy.hpp" 63 #include "utilities/defaultStream.hpp" 64 #include "utilities/dtrace.hpp" 65 #include "utilities/events.hpp" 66 #include "utilities/histogram.hpp" 67 #include "utilities/top.hpp" 68 #include "utilities/utf8.hpp" 69 #ifdef TARGET_OS_FAMILY_linux 70 # include "jvm_linux.h" 71 #endif 72 #ifdef TARGET_OS_FAMILY_solaris 73 # include "jvm_solaris.h" 74 #endif 75 #ifdef TARGET_OS_FAMILY_windows 76 # include "jvm_windows.h" 77 #endif 78 #ifdef TARGET_OS_FAMILY_bsd 79 # include "jvm_bsd.h" 80 #endif 81 82 #include <errno.h> 83 84 #ifndef USDT2 85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 88 #endif /* !USDT2 */ 89 90 /* 91 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 92 such ctors and calls MUST NOT come between an oop declaration/init and its 93 usage because if objects are move this may cause various memory stomps, bus 94 errors and segfaults. Here is a cookbook for causing so called "naked oop 95 failures": 96 97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 98 JVMWrapper("JVM_GetClassDeclaredFields"); 99 100 // Object address to be held directly in mirror & not visible to GC 101 oop mirror = JNIHandles::resolve_non_null(ofClass); 102 103 // If this ctor can hit a safepoint, moving objects around, then 104 ComplexConstructor foo; 105 106 // Boom! mirror may point to JUNK instead of the intended object 107 (some dereference of mirror) 108 109 // Here's another call that may block for GC, making mirror stale 110 MutexLocker ml(some_lock); 111 112 // And here's an initializer that can result in a stale oop 113 // all in one step. 114 oop o = call_that_can_throw_exception(TRAPS); 115 116 117 The solution is to keep the oop declaration BELOW the ctor or function 118 call that might cause a GC, do another resolve to reassign the oop, or 119 consider use of a Handle instead of an oop so there is immunity from object 120 motion. But note that the "QUICK" entries below do not have a handlemark 121 and thus can only support use of handles passed in. 122 */ 123 124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 125 ResourceMark rm; 126 int line_number = -1; 127 const char * source_file = NULL; 128 const char * trace = "explicit"; 129 InstanceKlass* caller = NULL; 130 JavaThread* jthread = JavaThread::current(); 131 if (jthread->has_last_Java_frame()) { 132 vframeStream vfst(jthread); 133 134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 136 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 138 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 139 140 Method* last_caller = NULL; 141 142 while (!vfst.at_end()) { 143 Method* m = vfst.method(); 144 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 145 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 146 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 147 break; 148 } 149 last_caller = m; 150 vfst.next(); 151 } 152 // if this is called from Class.forName0 and that is called from Class.forName, 153 // then print the caller of Class.forName. If this is Class.loadClass, then print 154 // that caller, otherwise keep quiet since this should be picked up elsewhere. 155 bool found_it = false; 156 if (!vfst.at_end() && 157 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 158 vfst.method()->name() == vmSymbols::forName0_name()) { 159 vfst.next(); 160 if (!vfst.at_end() && 161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 162 vfst.method()->name() == vmSymbols::forName_name()) { 163 vfst.next(); 164 found_it = true; 165 } 166 } else if (last_caller != NULL && 167 last_caller->method_holder()->name() == 168 vmSymbols::java_lang_ClassLoader() && 169 (last_caller->name() == vmSymbols::loadClassInternal_name() || 170 last_caller->name() == vmSymbols::loadClass_name())) { 171 found_it = true; 172 } else if (!vfst.at_end()) { 173 if (vfst.method()->is_native()) { 174 // JNI call 175 found_it = true; 176 } 177 } 178 if (found_it && !vfst.at_end()) { 179 // found the caller 180 caller = vfst.method()->method_holder(); 181 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 182 if (line_number == -1) { 183 // show method name if it's a native method 184 trace = vfst.method()->name_and_sig_as_C_string(); 185 } 186 Symbol* s = caller->source_file_name(); 187 if (s != NULL) { 188 source_file = s->as_C_string(); 189 } 190 } 191 } 192 if (caller != NULL) { 193 if (to_class != caller) { 194 const char * from = caller->external_name(); 195 const char * to = to_class->external_name(); 196 // print in a single call to reduce interleaving between threads 197 if (source_file != NULL) { 198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 199 } else { 200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 201 } 202 } 203 } 204 } 205 206 void trace_class_resolution(Klass* to_class) { 207 EXCEPTION_MARK; 208 trace_class_resolution_impl(to_class, THREAD); 209 if (HAS_PENDING_EXCEPTION) { 210 CLEAR_PENDING_EXCEPTION; 211 } 212 } 213 214 // Wrapper to trace JVM functions 215 216 #ifdef ASSERT 217 class JVMTraceWrapper : public StackObj { 218 public: 219 JVMTraceWrapper(const char* format, ...) { 220 if (TraceJVMCalls) { 221 va_list ap; 222 va_start(ap, format); 223 tty->print("JVM "); 224 tty->vprint_cr(format, ap); 225 va_end(ap); 226 } 227 } 228 }; 229 230 Histogram* JVMHistogram; 231 volatile jint JVMHistogram_lock = 0; 232 233 class JVMHistogramElement : public HistogramElement { 234 public: 235 JVMHistogramElement(const char* name); 236 }; 237 238 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 239 _name = elementName; 240 uintx count = 0; 241 242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 244 count +=1; 245 if ( (WarnOnStalledSpinLock > 0) 246 && (count % WarnOnStalledSpinLock == 0)) { 247 warning("JVMHistogram_lock seems to be stalled"); 248 } 249 } 250 } 251 252 if(JVMHistogram == NULL) 253 JVMHistogram = new Histogram("JVM Call Counts",100); 254 255 JVMHistogram->add_element(this); 256 Atomic::dec(&JVMHistogram_lock); 257 } 258 259 #define JVMCountWrapper(arg) \ 260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 262 263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 267 #else 268 #define JVMWrapper(arg1) 269 #define JVMWrapper2(arg1, arg2) 270 #define JVMWrapper3(arg1, arg2, arg3) 271 #define JVMWrapper4(arg1, arg2, arg3, arg4) 272 #endif 273 274 275 // Interface version ///////////////////////////////////////////////////////////////////// 276 277 278 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 279 return JVM_INTERFACE_VERSION; 280 JVM_END 281 282 283 // java.lang.System ////////////////////////////////////////////////////////////////////// 284 285 286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 287 JVMWrapper("JVM_CurrentTimeMillis"); 288 return os::javaTimeMillis(); 289 JVM_END 290 291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 292 JVMWrapper("JVM_NanoTime"); 293 return os::javaTimeNanos(); 294 JVM_END 295 296 297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 298 jobject dst, jint dst_pos, jint length)) 299 JVMWrapper("JVM_ArrayCopy"); 300 // Check if we have null pointers 301 if (src == NULL || dst == NULL) { 302 THROW(vmSymbols::java_lang_NullPointerException()); 303 } 304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 308 // Do copy 309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 310 JVM_END 311 312 313 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 314 JavaValue r(T_OBJECT); 315 // public synchronized Object put(Object key, Object value); 316 HandleMark hm(THREAD); 317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 319 JavaCalls::call_virtual(&r, 320 props, 321 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 322 vmSymbols::put_name(), 323 vmSymbols::object_object_object_signature(), 324 key_str, 325 value_str, 326 THREAD); 327 } 328 329 330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 331 332 333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 334 JVMWrapper("JVM_InitProperties"); 335 ResourceMark rm; 336 337 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 338 339 // System property list includes both user set via -D option and 340 // jvm system specific properties. 341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 342 PUTPROP(props, p->key(), p->value()); 343 } 344 345 // Convert the -XX:MaxDirectMemorySize= command line flag 346 // to the sun.nio.MaxDirectMemorySize property. 347 // Do this after setting user properties to prevent people 348 // from setting the value with a -D option, as requested. 349 { 350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 352 } else { 353 char as_chars[256]; 354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 356 } 357 } 358 359 PUTPROP(props, "sun.zip.clmulSupported", X86_ONLY(UseAVX && UseCLMUL ? "true" :) "false"); 360 361 // JVM monitoring and management support 362 // Add the sun.management.compiler property for the compiler's name 363 { 364 #undef CSIZE 365 #if defined(_LP64) || defined(_WIN64) 366 #define CSIZE "64-Bit " 367 #else 368 #define CSIZE 369 #endif // 64bit 370 371 #ifdef TIERED 372 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 373 #else 374 #if defined(COMPILER1) 375 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 376 #elif defined(COMPILER2) 377 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 378 #else 379 const char* compiler_name = ""; 380 #endif // compilers 381 #endif // TIERED 382 383 if (*compiler_name != '\0' && 384 (Arguments::mode() != Arguments::_int)) { 385 PUTPROP(props, "sun.management.compiler", compiler_name); 386 } 387 } 388 389 return properties; 390 JVM_END 391 392 393 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 394 395 extern volatile jint vm_created; 396 397 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 398 if (vm_created != 0 && (code == 0)) { 399 // The VM is about to exit. We call back into Java to check whether finalizers should be run 400 Universe::run_finalizers_on_exit(); 401 } 402 before_exit(thread); 403 vm_exit(code); 404 JVM_END 405 406 407 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 408 before_exit(thread); 409 vm_exit(code); 410 JVM_END 411 412 413 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 414 register_on_exit_function(func); 415 JVM_END 416 417 418 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 419 JVMWrapper("JVM_GC"); 420 if (!DisableExplicitGC) { 421 Universe::heap()->collect(GCCause::_java_lang_system_gc); 422 } 423 JVM_END 424 425 426 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 427 JVMWrapper("JVM_MaxObjectInspectionAge"); 428 return Universe::heap()->millis_since_last_gc(); 429 JVM_END 430 431 432 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 433 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 434 JVM_END 435 436 437 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 438 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 439 JVM_END 440 441 static inline jlong convert_size_t_to_jlong(size_t val) { 442 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 443 NOT_LP64 (return (jlong)val;) 444 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 445 } 446 447 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 448 JVMWrapper("JVM_TotalMemory"); 449 size_t n = Universe::heap()->capacity(); 450 return convert_size_t_to_jlong(n); 451 JVM_END 452 453 454 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 455 JVMWrapper("JVM_FreeMemory"); 456 CollectedHeap* ch = Universe::heap(); 457 size_t n; 458 { 459 MutexLocker x(Heap_lock); 460 n = ch->capacity() - ch->used(); 461 } 462 return convert_size_t_to_jlong(n); 463 JVM_END 464 465 466 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 467 JVMWrapper("JVM_MaxMemory"); 468 size_t n = Universe::heap()->max_capacity(); 469 return convert_size_t_to_jlong(n); 470 JVM_END 471 472 473 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 474 JVMWrapper("JVM_ActiveProcessorCount"); 475 return os::active_processor_count(); 476 JVM_END 477 478 479 480 // java.lang.Throwable ////////////////////////////////////////////////////// 481 482 483 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 484 JVMWrapper("JVM_FillInStackTrace"); 485 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 486 java_lang_Throwable::fill_in_stack_trace(exception); 487 JVM_END 488 489 490 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 491 JVMWrapper("JVM_GetStackTraceDepth"); 492 oop exception = JNIHandles::resolve(throwable); 493 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 494 JVM_END 495 496 497 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 498 JVMWrapper("JVM_GetStackTraceElement"); 499 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 500 oop exception = JNIHandles::resolve(throwable); 501 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 502 return JNIHandles::make_local(env, element); 503 JVM_END 504 505 506 // java.lang.Object /////////////////////////////////////////////// 507 508 509 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 510 JVMWrapper("JVM_IHashCode"); 511 // as implemented in the classic virtual machine; return 0 if object is NULL 512 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 513 JVM_END 514 515 516 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 517 JVMWrapper("JVM_MonitorWait"); 518 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 519 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 520 if (JvmtiExport::should_post_monitor_wait()) { 521 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 522 } 523 ObjectSynchronizer::wait(obj, ms, CHECK); 524 JVM_END 525 526 527 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 528 JVMWrapper("JVM_MonitorNotify"); 529 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 530 ObjectSynchronizer::notify(obj, CHECK); 531 JVM_END 532 533 534 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 535 JVMWrapper("JVM_MonitorNotifyAll"); 536 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 537 ObjectSynchronizer::notifyall(obj, CHECK); 538 JVM_END 539 540 541 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 542 JVMWrapper("JVM_Clone"); 543 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 544 const KlassHandle klass (THREAD, obj->klass()); 545 JvmtiVMObjectAllocEventCollector oam; 546 547 #ifdef ASSERT 548 // Just checking that the cloneable flag is set correct 549 if (obj->is_array()) { 550 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 551 } else { 552 guarantee(obj->is_instance(), "should be instanceOop"); 553 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 554 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 555 } 556 #endif 557 558 // Check if class of obj supports the Cloneable interface. 559 // All arrays are considered to be cloneable (See JLS 20.1.5) 560 if (!klass->is_cloneable()) { 561 ResourceMark rm(THREAD); 562 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 563 } 564 565 // Make shallow object copy 566 const int size = obj->size(); 567 oop new_obj = NULL; 568 if (obj->is_array()) { 569 const int length = ((arrayOop)obj())->length(); 570 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 571 } else { 572 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 573 } 574 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 575 // is modifying a reference field in the clonee, a non-oop-atomic copy might 576 // be suspended in the middle of copying the pointer and end up with parts 577 // of two different pointers in the field. Subsequent dereferences will crash. 578 // 4846409: an oop-copy of objects with long or double fields or arrays of same 579 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 580 // of oops. We know objects are aligned on a minimum of an jlong boundary. 581 // The same is true of StubRoutines::object_copy and the various oop_copy 582 // variants, and of the code generated by the inline_native_clone intrinsic. 583 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 584 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 585 (size_t)align_object_size(size) / HeapWordsPerLong); 586 // Clear the header 587 new_obj->init_mark(); 588 589 // Store check (mark entire object and let gc sort it out) 590 BarrierSet* bs = Universe::heap()->barrier_set(); 591 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 592 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 593 594 // Caution: this involves a java upcall, so the clone should be 595 // "gc-robust" by this stage. 596 if (klass->has_finalizer()) { 597 assert(obj->is_instance(), "should be instanceOop"); 598 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 599 } 600 601 return JNIHandles::make_local(env, oop(new_obj)); 602 JVM_END 603 604 // java.lang.Compiler //////////////////////////////////////////////////// 605 606 // The initial cuts of the HotSpot VM will not support JITs, and all existing 607 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 608 // functions are all silently ignored unless JVM warnings are printed. 609 610 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 611 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 612 JVM_END 613 614 615 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 616 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 617 return JNI_FALSE; 618 JVM_END 619 620 621 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 622 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 623 return JNI_FALSE; 624 JVM_END 625 626 627 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 628 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 629 return JNI_FALSE; 630 JVM_END 631 632 633 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 634 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 635 return NULL; 636 JVM_END 637 638 639 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 640 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 641 JVM_END 642 643 644 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 645 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 646 JVM_END 647 648 649 650 // Error message support ////////////////////////////////////////////////////// 651 652 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 653 JVMWrapper("JVM_GetLastErrorString"); 654 return (jint)os::lasterror(buf, len); 655 JVM_END 656 657 658 // java.io.File /////////////////////////////////////////////////////////////// 659 660 JVM_LEAF(char*, JVM_NativePath(char* path)) 661 JVMWrapper2("JVM_NativePath (%s)", path); 662 return os::native_path(path); 663 JVM_END 664 665 666 // Misc. class handling /////////////////////////////////////////////////////////// 667 668 669 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 670 JVMWrapper("JVM_GetCallerClass"); 671 672 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation. 673 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) { 674 Klass* k = thread->security_get_caller_class(depth); 675 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 676 } else { 677 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass 678 assert(depth == -1, "wrong handshake depth"); 679 } 680 681 // Getting the class of the caller frame. 682 // 683 // The call stack at this point looks something like this: 684 // 685 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 686 // [1] [ @CallerSensitive API.method ] 687 // [.] [ (skipped intermediate frames) ] 688 // [n] [ caller ] 689 vframeStream vfst(thread); 690 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 691 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 692 Method* m = vfst.method(); 693 assert(m != NULL, "sanity"); 694 switch (n) { 695 case 0: 696 // This must only be called from Reflection.getCallerClass 697 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 698 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 699 } 700 // fall-through 701 case 1: 702 // Frame 0 and 1 must be caller sensitive. 703 if (!m->caller_sensitive()) { 704 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 705 } 706 break; 707 default: 708 if (!m->is_ignored_by_security_stack_walk()) { 709 // We have reached the desired frame; return the holder class. 710 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 711 } 712 break; 713 } 714 } 715 return NULL; 716 JVM_END 717 718 719 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 720 JVMWrapper("JVM_FindPrimitiveClass"); 721 oop mirror = NULL; 722 BasicType t = name2type(utf); 723 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 724 mirror = Universe::java_mirror(t); 725 } 726 if (mirror == NULL) { 727 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 728 } else { 729 return (jclass) JNIHandles::make_local(env, mirror); 730 } 731 JVM_END 732 733 734 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 735 JVMWrapper("JVM_ResolveClass"); 736 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 737 JVM_END 738 739 740 // Returns a class loaded by the bootstrap class loader; or null 741 // if not found. ClassNotFoundException is not thrown. 742 // 743 // Rationale behind JVM_FindClassFromBootLoader 744 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 745 // b> because of (a) java.dll has a direct dependecy on the unexported 746 // private symbol "_JVM_FindClassFromClassLoader@20". 747 // c> the launcher cannot use the private symbol as it dynamically opens 748 // the entry point, so if something changes, the launcher will fail 749 // unexpectedly at runtime, it is safest for the launcher to dlopen a 750 // stable exported interface. 751 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 752 // signature to change from _JVM_FindClassFromClassLoader@20 to 753 // JVM_FindClassFromClassLoader and will not be backward compatible 754 // with older JDKs. 755 // Thus a public/stable exported entry point is the right solution, 756 // public here means public in linker semantics, and is exported only 757 // to the JDK, and is not intended to be a public API. 758 759 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 760 const char* name)) 761 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 762 763 // Java libraries should ensure that name is never null... 764 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 765 // It's impossible to create this class; the name cannot fit 766 // into the constant pool. 767 return NULL; 768 } 769 770 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 771 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 772 if (k == NULL) { 773 return NULL; 774 } 775 776 if (TraceClassResolution) { 777 trace_class_resolution(k); 778 } 779 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 780 JVM_END 781 782 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 783 jboolean init, jobject loader, 784 jboolean throwError)) 785 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 786 throwError ? "error" : "exception"); 787 // Java libraries should ensure that name is never null... 788 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 789 // It's impossible to create this class; the name cannot fit 790 // into the constant pool. 791 if (throwError) { 792 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 793 } else { 794 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 795 } 796 } 797 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 798 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 799 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 800 Handle(), throwError, THREAD); 801 802 if (TraceClassResolution && result != NULL) { 803 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 804 } 805 return result; 806 JVM_END 807 808 809 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 810 jboolean init, jclass from)) 811 JVMWrapper2("JVM_FindClassFromClass %s", name); 812 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 813 // It's impossible to create this class; the name cannot fit 814 // into the constant pool. 815 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 816 } 817 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 818 oop from_class_oop = JNIHandles::resolve(from); 819 Klass* from_class = (from_class_oop == NULL) 820 ? (Klass*)NULL 821 : java_lang_Class::as_Klass(from_class_oop); 822 oop class_loader = NULL; 823 oop protection_domain = NULL; 824 if (from_class != NULL) { 825 class_loader = from_class->class_loader(); 826 protection_domain = from_class->protection_domain(); 827 } 828 Handle h_loader(THREAD, class_loader); 829 Handle h_prot (THREAD, protection_domain); 830 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 831 h_prot, true, thread); 832 833 if (TraceClassResolution && result != NULL) { 834 // this function is generally only used for class loading during verification. 835 ResourceMark rm; 836 oop from_mirror = JNIHandles::resolve_non_null(from); 837 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 838 const char * from_name = from_class->external_name(); 839 840 oop mirror = JNIHandles::resolve_non_null(result); 841 Klass* to_class = java_lang_Class::as_Klass(mirror); 842 const char * to = to_class->external_name(); 843 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 844 } 845 846 return result; 847 JVM_END 848 849 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 850 if (loader.is_null()) { 851 return; 852 } 853 854 // check whether the current caller thread holds the lock or not. 855 // If not, increment the corresponding counter 856 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 857 ObjectSynchronizer::owner_self) { 858 counter->inc(); 859 } 860 } 861 862 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 863 // and JVM_DefineClassWithSourceCond() 864 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 865 jobject loader, const jbyte *buf, 866 jsize len, jobject pd, const char *source, 867 jboolean verify, TRAPS) { 868 if (source == NULL) source = "__JVM_DefineClass__"; 869 870 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 871 JavaThread* jt = (JavaThread*) THREAD; 872 873 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 874 ClassLoader::perf_define_appclass_selftime(), 875 ClassLoader::perf_define_appclasses(), 876 jt->get_thread_stat()->perf_recursion_counts_addr(), 877 jt->get_thread_stat()->perf_timers_addr(), 878 PerfClassTraceTime::DEFINE_CLASS); 879 880 if (UsePerfData) { 881 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 882 } 883 884 // Since exceptions can be thrown, class initialization can take place 885 // if name is NULL no check for class name in .class stream has to be made. 886 TempNewSymbol class_name = NULL; 887 if (name != NULL) { 888 const int str_len = (int)strlen(name); 889 if (str_len > Symbol::max_length()) { 890 // It's impossible to create this class; the name cannot fit 891 // into the constant pool. 892 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 893 } 894 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 895 } 896 897 ResourceMark rm(THREAD); 898 ClassFileStream st((u1*) buf, len, (char *)source); 899 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 900 if (UsePerfData) { 901 is_lock_held_by_thread(class_loader, 902 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 903 THREAD); 904 } 905 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 906 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 907 protection_domain, &st, 908 verify != 0, 909 CHECK_NULL); 910 911 if (TraceClassResolution && k != NULL) { 912 trace_class_resolution(k); 913 } 914 915 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 916 } 917 918 919 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 920 JVMWrapper2("JVM_DefineClass %s", name); 921 922 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 923 JVM_END 924 925 926 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 927 JVMWrapper2("JVM_DefineClassWithSource %s", name); 928 929 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 930 JVM_END 931 932 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 933 jobject loader, const jbyte *buf, 934 jsize len, jobject pd, 935 const char *source, jboolean verify)) 936 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 937 938 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 939 JVM_END 940 941 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 942 JVMWrapper("JVM_FindLoadedClass"); 943 ResourceMark rm(THREAD); 944 945 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 946 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 947 948 const char* str = java_lang_String::as_utf8_string(string()); 949 // Sanity check, don't expect null 950 if (str == NULL) return NULL; 951 952 const int str_len = (int)strlen(str); 953 if (str_len > Symbol::max_length()) { 954 // It's impossible to create this class; the name cannot fit 955 // into the constant pool. 956 return NULL; 957 } 958 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 959 960 // Security Note: 961 // The Java level wrapper will perform the necessary security check allowing 962 // us to pass the NULL as the initiating class loader. 963 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 964 if (UsePerfData) { 965 is_lock_held_by_thread(h_loader, 966 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 967 THREAD); 968 } 969 970 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 971 h_loader, 972 Handle(), 973 CHECK_NULL); 974 975 return (k == NULL) ? NULL : 976 (jclass) JNIHandles::make_local(env, k->java_mirror()); 977 JVM_END 978 979 980 // Reflection support ////////////////////////////////////////////////////////////////////////////// 981 982 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 983 assert (cls != NULL, "illegal class"); 984 JVMWrapper("JVM_GetClassName"); 985 JvmtiVMObjectAllocEventCollector oam; 986 ResourceMark rm(THREAD); 987 const char* name; 988 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 989 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 990 } else { 991 // Consider caching interned string in Klass 992 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 993 assert(k->is_klass(), "just checking"); 994 name = k->external_name(); 995 } 996 oop result = StringTable::intern((char*) name, CHECK_NULL); 997 return (jstring) JNIHandles::make_local(env, result); 998 JVM_END 999 1000 1001 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1002 JVMWrapper("JVM_GetClassInterfaces"); 1003 JvmtiVMObjectAllocEventCollector oam; 1004 oop mirror = JNIHandles::resolve_non_null(cls); 1005 1006 // Special handling for primitive objects 1007 if (java_lang_Class::is_primitive(mirror)) { 1008 // Primitive objects does not have any interfaces 1009 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1010 return (jobjectArray) JNIHandles::make_local(env, r); 1011 } 1012 1013 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1014 // Figure size of result array 1015 int size; 1016 if (klass->oop_is_instance()) { 1017 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1018 } else { 1019 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1020 size = 2; 1021 } 1022 1023 // Allocate result array 1024 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1025 objArrayHandle result (THREAD, r); 1026 // Fill in result 1027 if (klass->oop_is_instance()) { 1028 // Regular instance klass, fill in all local interfaces 1029 for (int index = 0; index < size; index++) { 1030 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1031 result->obj_at_put(index, k->java_mirror()); 1032 } 1033 } else { 1034 // All arrays implement java.lang.Cloneable and java.io.Serializable 1035 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1036 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1037 } 1038 return (jobjectArray) JNIHandles::make_local(env, result()); 1039 JVM_END 1040 1041 1042 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1043 JVMWrapper("JVM_GetClassLoader"); 1044 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1045 return NULL; 1046 } 1047 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1048 oop loader = k->class_loader(); 1049 return JNIHandles::make_local(env, loader); 1050 JVM_END 1051 1052 1053 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1054 JVMWrapper("JVM_IsInterface"); 1055 oop mirror = JNIHandles::resolve_non_null(cls); 1056 if (java_lang_Class::is_primitive(mirror)) { 1057 return JNI_FALSE; 1058 } 1059 Klass* k = java_lang_Class::as_Klass(mirror); 1060 jboolean result = k->is_interface(); 1061 assert(!result || k->oop_is_instance(), 1062 "all interfaces are instance types"); 1063 // The compiler intrinsic for isInterface tests the 1064 // Klass::_access_flags bits in the same way. 1065 return result; 1066 JVM_END 1067 1068 1069 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1070 JVMWrapper("JVM_GetClassSigners"); 1071 JvmtiVMObjectAllocEventCollector oam; 1072 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1073 // There are no signers for primitive types 1074 return NULL; 1075 } 1076 1077 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1078 objArrayOop signers = NULL; 1079 if (k->oop_is_instance()) { 1080 signers = InstanceKlass::cast(k)->signers(); 1081 } 1082 1083 // If there are no signers set in the class, or if the class 1084 // is an array, return NULL. 1085 if (signers == NULL) return NULL; 1086 1087 // copy of the signers array 1088 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1089 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1090 for (int index = 0; index < signers->length(); index++) { 1091 signers_copy->obj_at_put(index, signers->obj_at(index)); 1092 } 1093 1094 // return the copy 1095 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1096 JVM_END 1097 1098 1099 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1100 JVMWrapper("JVM_SetClassSigners"); 1101 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1102 // This call is ignored for primitive types and arrays. 1103 // Signers are only set once, ClassLoader.java, and thus shouldn't 1104 // be called with an array. Only the bootstrap loader creates arrays. 1105 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1106 if (k->oop_is_instance()) { 1107 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1108 } 1109 } 1110 JVM_END 1111 1112 1113 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1114 JVMWrapper("JVM_GetProtectionDomain"); 1115 if (JNIHandles::resolve(cls) == NULL) { 1116 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1117 } 1118 1119 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1120 // Primitive types does not have a protection domain. 1121 return NULL; 1122 } 1123 1124 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1125 return (jobject) JNIHandles::make_local(env, k->protection_domain()); 1126 JVM_END 1127 1128 1129 // Obsolete since 1.2 (Class.setProtectionDomain removed), although 1130 // still defined in core libraries as of 1.5. 1131 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1132 JVMWrapper("JVM_SetProtectionDomain"); 1133 if (JNIHandles::resolve(cls) == NULL) { 1134 THROW(vmSymbols::java_lang_NullPointerException()); 1135 } 1136 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1137 // Call is ignored for primitive types 1138 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1139 1140 // cls won't be an array, as this called only from ClassLoader.defineClass 1141 if (k->oop_is_instance()) { 1142 oop pd = JNIHandles::resolve(protection_domain); 1143 assert(pd == NULL || pd->is_oop(), "just checking"); 1144 InstanceKlass::cast(k)->set_protection_domain(pd); 1145 } 1146 } 1147 JVM_END 1148 1149 1150 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1151 JVMWrapper("JVM_DoPrivileged"); 1152 1153 if (action == NULL) { 1154 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1155 } 1156 1157 // Stack allocated list of privileged stack elements 1158 PrivilegedElement pi; 1159 1160 // Check that action object understands "Object run()" 1161 Handle object (THREAD, JNIHandles::resolve(action)); 1162 1163 // get run() method 1164 Method* m_oop = object->klass()->uncached_lookup_method( 1165 vmSymbols::run_method_name(), 1166 vmSymbols::void_object_signature()); 1167 methodHandle m (THREAD, m_oop); 1168 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1169 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1170 } 1171 1172 // Compute the frame initiating the do privileged operation and setup the privileged stack 1173 vframeStream vfst(thread); 1174 vfst.security_get_caller_frame(1); 1175 1176 if (!vfst.at_end()) { 1177 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1178 thread->set_privileged_stack_top(&pi); 1179 } 1180 1181 1182 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1183 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1184 Handle pending_exception; 1185 JavaValue result(T_OBJECT); 1186 JavaCallArguments args(object); 1187 JavaCalls::call(&result, m, &args, THREAD); 1188 1189 // done with action, remove ourselves from the list 1190 if (!vfst.at_end()) { 1191 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1192 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1193 } 1194 1195 if (HAS_PENDING_EXCEPTION) { 1196 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1197 CLEAR_PENDING_EXCEPTION; 1198 1199 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1200 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1201 // Throw a java.security.PrivilegedActionException(Exception e) exception 1202 JavaCallArguments args(pending_exception); 1203 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1204 vmSymbols::exception_void_signature(), 1205 &args); 1206 } 1207 } 1208 1209 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1210 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1211 JVM_END 1212 1213 1214 // Returns the inherited_access_control_context field of the running thread. 1215 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1216 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1217 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1218 return JNIHandles::make_local(env, result); 1219 JVM_END 1220 1221 class RegisterArrayForGC { 1222 private: 1223 JavaThread *_thread; 1224 public: 1225 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1226 _thread = thread; 1227 _thread->register_array_for_gc(array); 1228 } 1229 1230 ~RegisterArrayForGC() { 1231 _thread->register_array_for_gc(NULL); 1232 } 1233 }; 1234 1235 1236 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1237 JVMWrapper("JVM_GetStackAccessControlContext"); 1238 if (!UsePrivilegedStack) return NULL; 1239 1240 ResourceMark rm(THREAD); 1241 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1242 JvmtiVMObjectAllocEventCollector oam; 1243 1244 // count the protection domains on the execution stack. We collapse 1245 // duplicate consecutive protection domains into a single one, as 1246 // well as stopping when we hit a privileged frame. 1247 1248 // Use vframeStream to iterate through Java frames 1249 vframeStream vfst(thread); 1250 1251 oop previous_protection_domain = NULL; 1252 Handle privileged_context(thread, NULL); 1253 bool is_privileged = false; 1254 oop protection_domain = NULL; 1255 1256 for(; !vfst.at_end(); vfst.next()) { 1257 // get method of frame 1258 Method* method = vfst.method(); 1259 intptr_t* frame_id = vfst.frame_id(); 1260 1261 // check the privileged frames to see if we have a match 1262 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1263 // this frame is privileged 1264 is_privileged = true; 1265 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1266 protection_domain = thread->privileged_stack_top()->protection_domain(); 1267 } else { 1268 protection_domain = method->method_holder()->protection_domain(); 1269 } 1270 1271 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1272 local_array->push(protection_domain); 1273 previous_protection_domain = protection_domain; 1274 } 1275 1276 if (is_privileged) break; 1277 } 1278 1279 1280 // either all the domains on the stack were system domains, or 1281 // we had a privileged system domain 1282 if (local_array->is_empty()) { 1283 if (is_privileged && privileged_context.is_null()) return NULL; 1284 1285 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1286 return JNIHandles::make_local(env, result); 1287 } 1288 1289 // the resource area must be registered in case of a gc 1290 RegisterArrayForGC ragc(thread, local_array); 1291 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1292 local_array->length(), CHECK_NULL); 1293 objArrayHandle h_context(thread, context); 1294 for (int index = 0; index < local_array->length(); index++) { 1295 h_context->obj_at_put(index, local_array->at(index)); 1296 } 1297 1298 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1299 1300 return JNIHandles::make_local(env, result); 1301 JVM_END 1302 1303 1304 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1305 JVMWrapper("JVM_IsArrayClass"); 1306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1307 return (k != NULL) && k->oop_is_array() ? true : false; 1308 JVM_END 1309 1310 1311 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1312 JVMWrapper("JVM_IsPrimitiveClass"); 1313 oop mirror = JNIHandles::resolve_non_null(cls); 1314 return (jboolean) java_lang_Class::is_primitive(mirror); 1315 JVM_END 1316 1317 1318 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1319 JVMWrapper("JVM_GetComponentType"); 1320 oop mirror = JNIHandles::resolve_non_null(cls); 1321 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1322 return (jclass) JNIHandles::make_local(env, result); 1323 JVM_END 1324 1325 1326 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1327 JVMWrapper("JVM_GetClassModifiers"); 1328 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1329 // Primitive type 1330 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1331 } 1332 1333 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1334 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1335 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1336 return k->modifier_flags(); 1337 JVM_END 1338 1339 1340 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1341 1342 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1343 JvmtiVMObjectAllocEventCollector oam; 1344 // ofClass is a reference to a java_lang_Class object. The mirror object 1345 // of an InstanceKlass 1346 1347 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1348 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1349 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1350 return (jobjectArray)JNIHandles::make_local(env, result); 1351 } 1352 1353 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1354 InnerClassesIterator iter(k); 1355 1356 if (iter.length() == 0) { 1357 // Neither an inner nor outer class 1358 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1359 return (jobjectArray)JNIHandles::make_local(env, result); 1360 } 1361 1362 // find inner class info 1363 constantPoolHandle cp(thread, k->constants()); 1364 int length = iter.length(); 1365 1366 // Allocate temp. result array 1367 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1368 objArrayHandle result (THREAD, r); 1369 int members = 0; 1370 1371 for (; !iter.done(); iter.next()) { 1372 int ioff = iter.inner_class_info_index(); 1373 int ooff = iter.outer_class_info_index(); 1374 1375 if (ioff != 0 && ooff != 0) { 1376 // Check to see if the name matches the class we're looking for 1377 // before attempting to find the class. 1378 if (cp->klass_name_at_matches(k, ooff)) { 1379 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1380 if (outer_klass == k()) { 1381 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1382 instanceKlassHandle inner_klass (THREAD, ik); 1383 1384 // Throws an exception if outer klass has not declared k as 1385 // an inner klass 1386 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1387 1388 result->obj_at_put(members, inner_klass->java_mirror()); 1389 members++; 1390 } 1391 } 1392 } 1393 } 1394 1395 if (members != length) { 1396 // Return array of right length 1397 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1398 for(int i = 0; i < members; i++) { 1399 res->obj_at_put(i, result->obj_at(i)); 1400 } 1401 return (jobjectArray)JNIHandles::make_local(env, res); 1402 } 1403 1404 return (jobjectArray)JNIHandles::make_local(env, result()); 1405 JVM_END 1406 1407 1408 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1409 { 1410 // ofClass is a reference to a java_lang_Class object. 1411 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1412 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1413 return NULL; 1414 } 1415 1416 bool inner_is_member = false; 1417 Klass* outer_klass 1418 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1419 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1420 if (outer_klass == NULL) return NULL; // already a top-level class 1421 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1422 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1423 } 1424 JVM_END 1425 1426 // should be in InstanceKlass.cpp, but is here for historical reasons 1427 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1428 bool* inner_is_member, 1429 TRAPS) { 1430 Thread* thread = THREAD; 1431 InnerClassesIterator iter(k); 1432 if (iter.length() == 0) { 1433 // No inner class info => no declaring class 1434 return NULL; 1435 } 1436 1437 constantPoolHandle i_cp(thread, k->constants()); 1438 1439 bool found = false; 1440 Klass* ok; 1441 instanceKlassHandle outer_klass; 1442 *inner_is_member = false; 1443 1444 // Find inner_klass attribute 1445 for (; !iter.done() && !found; iter.next()) { 1446 int ioff = iter.inner_class_info_index(); 1447 int ooff = iter.outer_class_info_index(); 1448 int noff = iter.inner_name_index(); 1449 if (ioff != 0) { 1450 // Check to see if the name matches the class we're looking for 1451 // before attempting to find the class. 1452 if (i_cp->klass_name_at_matches(k, ioff)) { 1453 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1454 found = (k() == inner_klass); 1455 if (found && ooff != 0) { 1456 ok = i_cp->klass_at(ooff, CHECK_NULL); 1457 outer_klass = instanceKlassHandle(thread, ok); 1458 *inner_is_member = true; 1459 } 1460 } 1461 } 1462 } 1463 1464 if (found && outer_klass.is_null()) { 1465 // It may be anonymous; try for that. 1466 int encl_method_class_idx = k->enclosing_method_class_index(); 1467 if (encl_method_class_idx != 0) { 1468 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1469 outer_klass = instanceKlassHandle(thread, ok); 1470 *inner_is_member = false; 1471 } 1472 } 1473 1474 // If no inner class attribute found for this class. 1475 if (outer_klass.is_null()) return NULL; 1476 1477 // Throws an exception if outer klass has not declared k as an inner klass 1478 // We need evidence that each klass knows about the other, or else 1479 // the system could allow a spoof of an inner class to gain access rights. 1480 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1481 return outer_klass(); 1482 } 1483 1484 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1485 assert (cls != NULL, "illegal class"); 1486 JVMWrapper("JVM_GetClassSignature"); 1487 JvmtiVMObjectAllocEventCollector oam; 1488 ResourceMark rm(THREAD); 1489 // Return null for arrays and primatives 1490 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1492 if (k->oop_is_instance()) { 1493 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1494 if (sym == NULL) return NULL; 1495 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1496 return (jstring) JNIHandles::make_local(env, str()); 1497 } 1498 } 1499 return NULL; 1500 JVM_END 1501 1502 1503 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1504 assert (cls != NULL, "illegal class"); 1505 JVMWrapper("JVM_GetClassAnnotations"); 1506 1507 // Return null for arrays and primitives 1508 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1509 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1510 if (k->oop_is_instance()) { 1511 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1512 return (jbyteArray) JNIHandles::make_local(env, a); 1513 } 1514 } 1515 return NULL; 1516 JVM_END 1517 1518 1519 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1520 // some of this code was adapted from from jni_FromReflectedField 1521 1522 oop reflected = JNIHandles::resolve_non_null(field); 1523 oop mirror = java_lang_reflect_Field::clazz(reflected); 1524 Klass* k = java_lang_Class::as_Klass(mirror); 1525 int slot = java_lang_reflect_Field::slot(reflected); 1526 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1527 1528 KlassHandle kh(THREAD, k); 1529 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1530 1531 if (modifiers & JVM_ACC_STATIC) { 1532 // for static fields we only look in the current class 1533 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1534 assert(false, "cannot find static field"); 1535 return false; 1536 } 1537 } else { 1538 // for instance fields we start with the current class and work 1539 // our way up through the superclass chain 1540 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1541 assert(false, "cannot find instance field"); 1542 return false; 1543 } 1544 } 1545 return true; 1546 } 1547 1548 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1549 // field is a handle to a java.lang.reflect.Field object 1550 assert(field != NULL, "illegal field"); 1551 JVMWrapper("JVM_GetFieldAnnotations"); 1552 1553 fieldDescriptor fd; 1554 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1555 if (!gotFd) { 1556 return NULL; 1557 } 1558 1559 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1560 JVM_END 1561 1562 1563 static Method* jvm_get_method_common(jobject method) { 1564 // some of this code was adapted from from jni_FromReflectedMethod 1565 1566 oop reflected = JNIHandles::resolve_non_null(method); 1567 oop mirror = NULL; 1568 int slot = 0; 1569 1570 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1571 mirror = java_lang_reflect_Constructor::clazz(reflected); 1572 slot = java_lang_reflect_Constructor::slot(reflected); 1573 } else { 1574 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1575 "wrong type"); 1576 mirror = java_lang_reflect_Method::clazz(reflected); 1577 slot = java_lang_reflect_Method::slot(reflected); 1578 } 1579 Klass* k = java_lang_Class::as_Klass(mirror); 1580 1581 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1582 assert(m != NULL, "cannot find method"); 1583 return m; // caller has to deal with NULL in product mode 1584 } 1585 1586 1587 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1588 JVMWrapper("JVM_GetMethodAnnotations"); 1589 1590 // method is a handle to a java.lang.reflect.Method object 1591 Method* m = jvm_get_method_common(method); 1592 if (m == NULL) { 1593 return NULL; 1594 } 1595 1596 return (jbyteArray) JNIHandles::make_local(env, 1597 Annotations::make_java_array(m->annotations(), THREAD)); 1598 JVM_END 1599 1600 1601 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1602 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1603 1604 // method is a handle to a java.lang.reflect.Method object 1605 Method* m = jvm_get_method_common(method); 1606 if (m == NULL) { 1607 return NULL; 1608 } 1609 1610 return (jbyteArray) JNIHandles::make_local(env, 1611 Annotations::make_java_array(m->annotation_default(), THREAD)); 1612 JVM_END 1613 1614 1615 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1616 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1617 1618 // method is a handle to a java.lang.reflect.Method object 1619 Method* m = jvm_get_method_common(method); 1620 if (m == NULL) { 1621 return NULL; 1622 } 1623 1624 return (jbyteArray) JNIHandles::make_local(env, 1625 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1626 JVM_END 1627 1628 /* Type use annotations support (JDK 1.8) */ 1629 1630 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1631 assert (cls != NULL, "illegal class"); 1632 JVMWrapper("JVM_GetClassTypeAnnotations"); 1633 ResourceMark rm(THREAD); 1634 // Return null for arrays and primitives 1635 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1636 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1637 if (k->oop_is_instance()) { 1638 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1639 if (type_annotations != NULL) { 1640 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1641 return (jbyteArray) JNIHandles::make_local(env, a); 1642 } 1643 } 1644 } 1645 return NULL; 1646 JVM_END 1647 1648 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1649 assert (method != NULL, "illegal method"); 1650 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1651 1652 // method is a handle to a java.lang.reflect.Method object 1653 Method* m = jvm_get_method_common(method); 1654 if (m == NULL) { 1655 return NULL; 1656 } 1657 1658 AnnotationArray* type_annotations = m->type_annotations(); 1659 if (type_annotations != NULL) { 1660 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1661 return (jbyteArray) JNIHandles::make_local(env, a); 1662 } 1663 1664 return NULL; 1665 JVM_END 1666 1667 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1668 assert (field != NULL, "illegal field"); 1669 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1670 1671 fieldDescriptor fd; 1672 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1673 if (!gotFd) { 1674 return NULL; 1675 } 1676 1677 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1678 JVM_END 1679 1680 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1681 if (!cp->is_within_bounds(index)) { 1682 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1683 } 1684 } 1685 1686 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1687 { 1688 JVMWrapper("JVM_GetMethodParameters"); 1689 // method is a handle to a java.lang.reflect.Method object 1690 Method* method_ptr = jvm_get_method_common(method); 1691 methodHandle mh (THREAD, method_ptr); 1692 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1693 const int num_params = mh->method_parameters_length(); 1694 1695 if (0 != num_params) { 1696 // make sure all the symbols are properly formatted 1697 for (int i = 0; i < num_params; i++) { 1698 MethodParametersElement* params = mh->method_parameters_start(); 1699 int index = params[i].name_cp_index; 1700 bounds_check(mh->constants(), index, CHECK_NULL); 1701 1702 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1703 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1704 "Wrong type at constant pool index"); 1705 } 1706 1707 } 1708 1709 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1710 objArrayHandle result (THREAD, result_oop); 1711 1712 for (int i = 0; i < num_params; i++) { 1713 MethodParametersElement* params = mh->method_parameters_start(); 1714 // For a 0 index, give a NULL symbol 1715 Symbol* const sym = 0 != params[i].name_cp_index ? 1716 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1717 int flags = params[i].flags; 1718 oop param = Reflection::new_parameter(reflected_method, i, sym, 1719 flags, CHECK_NULL); 1720 result->obj_at_put(i, param); 1721 } 1722 return (jobjectArray)JNIHandles::make_local(env, result()); 1723 } else { 1724 return (jobjectArray)NULL; 1725 } 1726 } 1727 JVM_END 1728 1729 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1730 1731 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1732 { 1733 JVMWrapper("JVM_GetClassDeclaredFields"); 1734 JvmtiVMObjectAllocEventCollector oam; 1735 1736 // Exclude primitive types and array types 1737 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1738 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1739 // Return empty array 1740 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1741 return (jobjectArray) JNIHandles::make_local(env, res); 1742 } 1743 1744 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1745 constantPoolHandle cp(THREAD, k->constants()); 1746 1747 // Ensure class is linked 1748 k->link_class(CHECK_NULL); 1749 1750 // 4496456 We need to filter out java.lang.Throwable.backtrace 1751 bool skip_backtrace = false; 1752 1753 // Allocate result 1754 int num_fields; 1755 1756 if (publicOnly) { 1757 num_fields = 0; 1758 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1759 if (fs.access_flags().is_public()) ++num_fields; 1760 } 1761 } else { 1762 num_fields = k->java_fields_count(); 1763 1764 if (k() == SystemDictionary::Throwable_klass()) { 1765 num_fields--; 1766 skip_backtrace = true; 1767 } 1768 } 1769 1770 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1771 objArrayHandle result (THREAD, r); 1772 1773 int out_idx = 0; 1774 fieldDescriptor fd; 1775 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1776 if (skip_backtrace) { 1777 // 4496456 skip java.lang.Throwable.backtrace 1778 int offset = fs.offset(); 1779 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1780 } 1781 1782 if (!publicOnly || fs.access_flags().is_public()) { 1783 fd.initialize(k(), fs.index()); 1784 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1785 result->obj_at_put(out_idx, field); 1786 ++out_idx; 1787 } 1788 } 1789 assert(out_idx == num_fields, "just checking"); 1790 return (jobjectArray) JNIHandles::make_local(env, result()); 1791 } 1792 JVM_END 1793 1794 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1795 { 1796 JVMWrapper("JVM_GetClassDeclaredMethods"); 1797 JvmtiVMObjectAllocEventCollector oam; 1798 1799 // Exclude primitive types and array types 1800 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1801 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1802 // Return empty array 1803 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1804 return (jobjectArray) JNIHandles::make_local(env, res); 1805 } 1806 1807 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1808 1809 // Ensure class is linked 1810 k->link_class(CHECK_NULL); 1811 1812 Array<Method*>* methods = k->methods(); 1813 int methods_length = methods->length(); 1814 int num_methods = 0; 1815 1816 int i; 1817 for (i = 0; i < methods_length; i++) { 1818 methodHandle method(THREAD, methods->at(i)); 1819 if (!method->is_initializer() && !method->is_overpass()) { 1820 if (!publicOnly || method->is_public()) { 1821 ++num_methods; 1822 } 1823 } 1824 } 1825 1826 // Allocate result 1827 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1828 objArrayHandle result (THREAD, r); 1829 1830 int out_idx = 0; 1831 for (i = 0; i < methods_length; i++) { 1832 methodHandle method(THREAD, methods->at(i)); 1833 if (!method->is_initializer() && !method->is_overpass()) { 1834 if (!publicOnly || method->is_public()) { 1835 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1836 result->obj_at_put(out_idx, m); 1837 ++out_idx; 1838 } 1839 } 1840 } 1841 assert(out_idx == num_methods, "just checking"); 1842 return (jobjectArray) JNIHandles::make_local(env, result()); 1843 } 1844 JVM_END 1845 1846 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1847 { 1848 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1849 JvmtiVMObjectAllocEventCollector oam; 1850 1851 // Exclude primitive types and array types 1852 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1853 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1854 // Return empty array 1855 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1856 return (jobjectArray) JNIHandles::make_local(env, res); 1857 } 1858 1859 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1860 1861 // Ensure class is linked 1862 k->link_class(CHECK_NULL); 1863 1864 Array<Method*>* methods = k->methods(); 1865 int methods_length = methods->length(); 1866 int num_constructors = 0; 1867 1868 int i; 1869 for (i = 0; i < methods_length; i++) { 1870 methodHandle method(THREAD, methods->at(i)); 1871 if (method->is_initializer() && !method->is_static()) { 1872 if (!publicOnly || method->is_public()) { 1873 ++num_constructors; 1874 } 1875 } 1876 } 1877 1878 // Allocate result 1879 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1880 objArrayHandle result(THREAD, r); 1881 1882 int out_idx = 0; 1883 for (i = 0; i < methods_length; i++) { 1884 methodHandle method(THREAD, methods->at(i)); 1885 if (method->is_initializer() && !method->is_static()) { 1886 if (!publicOnly || method->is_public()) { 1887 oop m = Reflection::new_constructor(method, CHECK_NULL); 1888 result->obj_at_put(out_idx, m); 1889 ++out_idx; 1890 } 1891 } 1892 } 1893 assert(out_idx == num_constructors, "just checking"); 1894 return (jobjectArray) JNIHandles::make_local(env, result()); 1895 } 1896 JVM_END 1897 1898 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1899 { 1900 JVMWrapper("JVM_GetClassAccessFlags"); 1901 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1902 // Primitive type 1903 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1904 } 1905 1906 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1907 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1908 } 1909 JVM_END 1910 1911 1912 // Constant pool access ////////////////////////////////////////////////////////// 1913 1914 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1915 { 1916 JVMWrapper("JVM_GetClassConstantPool"); 1917 JvmtiVMObjectAllocEventCollector oam; 1918 1919 // Return null for primitives and arrays 1920 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1921 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1922 if (k->oop_is_instance()) { 1923 instanceKlassHandle k_h(THREAD, k); 1924 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1925 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1926 return JNIHandles::make_local(jcp()); 1927 } 1928 } 1929 return NULL; 1930 } 1931 JVM_END 1932 1933 1934 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1935 { 1936 JVMWrapper("JVM_ConstantPoolGetSize"); 1937 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1938 return cp->length(); 1939 } 1940 JVM_END 1941 1942 1943 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1944 { 1945 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1946 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1947 bounds_check(cp, index, CHECK_NULL); 1948 constantTag tag = cp->tag_at(index); 1949 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1950 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1951 } 1952 Klass* k = cp->klass_at(index, CHECK_NULL); 1953 return (jclass) JNIHandles::make_local(k->java_mirror()); 1954 } 1955 JVM_END 1956 1957 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1958 { 1959 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1960 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1961 bounds_check(cp, index, CHECK_NULL); 1962 constantTag tag = cp->tag_at(index); 1963 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1964 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1965 } 1966 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 1967 if (k == NULL) return NULL; 1968 return (jclass) JNIHandles::make_local(k->java_mirror()); 1969 } 1970 JVM_END 1971 1972 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1973 constantTag tag = cp->tag_at(index); 1974 if (!tag.is_method() && !tag.is_interface_method()) { 1975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1976 } 1977 int klass_ref = cp->uncached_klass_ref_index_at(index); 1978 Klass* k_o; 1979 if (force_resolution) { 1980 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1981 } else { 1982 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 1983 if (k_o == NULL) return NULL; 1984 } 1985 instanceKlassHandle k(THREAD, k_o); 1986 Symbol* name = cp->uncached_name_ref_at(index); 1987 Symbol* sig = cp->uncached_signature_ref_at(index); 1988 methodHandle m (THREAD, k->find_method(name, sig)); 1989 if (m.is_null()) { 1990 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1991 } 1992 oop method; 1993 if (!m->is_initializer() || m->is_static()) { 1994 method = Reflection::new_method(m, true, true, CHECK_NULL); 1995 } else { 1996 method = Reflection::new_constructor(m, CHECK_NULL); 1997 } 1998 return JNIHandles::make_local(method); 1999 } 2000 2001 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2002 { 2003 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2004 JvmtiVMObjectAllocEventCollector oam; 2005 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2006 bounds_check(cp, index, CHECK_NULL); 2007 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2008 return res; 2009 } 2010 JVM_END 2011 2012 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2013 { 2014 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2015 JvmtiVMObjectAllocEventCollector oam; 2016 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2017 bounds_check(cp, index, CHECK_NULL); 2018 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2019 return res; 2020 } 2021 JVM_END 2022 2023 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2024 constantTag tag = cp->tag_at(index); 2025 if (!tag.is_field()) { 2026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2027 } 2028 int klass_ref = cp->uncached_klass_ref_index_at(index); 2029 Klass* k_o; 2030 if (force_resolution) { 2031 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2032 } else { 2033 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2034 if (k_o == NULL) return NULL; 2035 } 2036 instanceKlassHandle k(THREAD, k_o); 2037 Symbol* name = cp->uncached_name_ref_at(index); 2038 Symbol* sig = cp->uncached_signature_ref_at(index); 2039 fieldDescriptor fd; 2040 Klass* target_klass = k->find_field(name, sig, &fd); 2041 if (target_klass == NULL) { 2042 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2043 } 2044 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2045 return JNIHandles::make_local(field); 2046 } 2047 2048 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2049 { 2050 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2051 JvmtiVMObjectAllocEventCollector oam; 2052 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2053 bounds_check(cp, index, CHECK_NULL); 2054 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2055 return res; 2056 } 2057 JVM_END 2058 2059 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2060 { 2061 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2062 JvmtiVMObjectAllocEventCollector oam; 2063 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2064 bounds_check(cp, index, CHECK_NULL); 2065 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2066 return res; 2067 } 2068 JVM_END 2069 2070 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2071 { 2072 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2073 JvmtiVMObjectAllocEventCollector oam; 2074 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2075 bounds_check(cp, index, CHECK_NULL); 2076 constantTag tag = cp->tag_at(index); 2077 if (!tag.is_field_or_method()) { 2078 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2079 } 2080 int klass_ref = cp->uncached_klass_ref_index_at(index); 2081 Symbol* klass_name = cp->klass_name_at(klass_ref); 2082 Symbol* member_name = cp->uncached_name_ref_at(index); 2083 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2084 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2085 objArrayHandle dest(THREAD, dest_o); 2086 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2087 dest->obj_at_put(0, str()); 2088 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2089 dest->obj_at_put(1, str()); 2090 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2091 dest->obj_at_put(2, str()); 2092 return (jobjectArray) JNIHandles::make_local(dest()); 2093 } 2094 JVM_END 2095 2096 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2097 { 2098 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2099 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2100 bounds_check(cp, index, CHECK_0); 2101 constantTag tag = cp->tag_at(index); 2102 if (!tag.is_int()) { 2103 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2104 } 2105 return cp->int_at(index); 2106 } 2107 JVM_END 2108 2109 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2110 { 2111 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2112 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2113 bounds_check(cp, index, CHECK_(0L)); 2114 constantTag tag = cp->tag_at(index); 2115 if (!tag.is_long()) { 2116 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2117 } 2118 return cp->long_at(index); 2119 } 2120 JVM_END 2121 2122 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2123 { 2124 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2125 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2126 bounds_check(cp, index, CHECK_(0.0f)); 2127 constantTag tag = cp->tag_at(index); 2128 if (!tag.is_float()) { 2129 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2130 } 2131 return cp->float_at(index); 2132 } 2133 JVM_END 2134 2135 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2136 { 2137 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2138 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2139 bounds_check(cp, index, CHECK_(0.0)); 2140 constantTag tag = cp->tag_at(index); 2141 if (!tag.is_double()) { 2142 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2143 } 2144 return cp->double_at(index); 2145 } 2146 JVM_END 2147 2148 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2149 { 2150 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2151 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2152 bounds_check(cp, index, CHECK_NULL); 2153 constantTag tag = cp->tag_at(index); 2154 if (!tag.is_string()) { 2155 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2156 } 2157 oop str = cp->string_at(index, CHECK_NULL); 2158 return (jstring) JNIHandles::make_local(str); 2159 } 2160 JVM_END 2161 2162 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2163 { 2164 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2165 JvmtiVMObjectAllocEventCollector oam; 2166 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2167 bounds_check(cp, index, CHECK_NULL); 2168 constantTag tag = cp->tag_at(index); 2169 if (!tag.is_symbol()) { 2170 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2171 } 2172 Symbol* sym = cp->symbol_at(index); 2173 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2174 return (jstring) JNIHandles::make_local(str()); 2175 } 2176 JVM_END 2177 2178 2179 // Assertion support. ////////////////////////////////////////////////////////// 2180 2181 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2182 JVMWrapper("JVM_DesiredAssertionStatus"); 2183 assert(cls != NULL, "bad class"); 2184 2185 oop r = JNIHandles::resolve(cls); 2186 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2187 if (java_lang_Class::is_primitive(r)) return false; 2188 2189 Klass* k = java_lang_Class::as_Klass(r); 2190 assert(k->oop_is_instance(), "must be an instance klass"); 2191 if (! k->oop_is_instance()) return false; 2192 2193 ResourceMark rm(THREAD); 2194 const char* name = k->name()->as_C_string(); 2195 bool system_class = k->class_loader() == NULL; 2196 return JavaAssertions::enabled(name, system_class); 2197 2198 JVM_END 2199 2200 2201 // Return a new AssertionStatusDirectives object with the fields filled in with 2202 // command-line assertion arguments (i.e., -ea, -da). 2203 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2204 JVMWrapper("JVM_AssertionStatusDirectives"); 2205 JvmtiVMObjectAllocEventCollector oam; 2206 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2207 return JNIHandles::make_local(env, asd); 2208 JVM_END 2209 2210 // Verification //////////////////////////////////////////////////////////////////////////////// 2211 2212 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2213 2214 // RedefineClasses support: bug 6214132 caused verification to fail. 2215 // All functions from this section should call the jvmtiThreadSate function: 2216 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2217 // The function returns a Klass* of the _scratch_class if the verifier 2218 // was invoked in the middle of the class redefinition. 2219 // Otherwise it returns its argument value which is the _the_class Klass*. 2220 // Please, refer to the description in the jvmtiThreadSate.hpp. 2221 2222 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2223 JVMWrapper("JVM_GetClassNameUTF"); 2224 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2225 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2226 return k->name()->as_utf8(); 2227 JVM_END 2228 2229 2230 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2231 JVMWrapper("JVM_GetClassCPTypes"); 2232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2233 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2234 // types will have length zero if this is not an InstanceKlass 2235 // (length is determined by call to JVM_GetClassCPEntriesCount) 2236 if (k->oop_is_instance()) { 2237 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2238 for (int index = cp->length() - 1; index >= 0; index--) { 2239 constantTag tag = cp->tag_at(index); 2240 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2241 } 2242 } 2243 JVM_END 2244 2245 2246 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2247 JVMWrapper("JVM_GetClassCPEntriesCount"); 2248 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2249 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2250 if (!k->oop_is_instance()) 2251 return 0; 2252 return InstanceKlass::cast(k)->constants()->length(); 2253 JVM_END 2254 2255 2256 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2257 JVMWrapper("JVM_GetClassFieldsCount"); 2258 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2260 if (!k->oop_is_instance()) 2261 return 0; 2262 return InstanceKlass::cast(k)->java_fields_count(); 2263 JVM_END 2264 2265 2266 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2267 JVMWrapper("JVM_GetClassMethodsCount"); 2268 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2269 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2270 if (!k->oop_is_instance()) 2271 return 0; 2272 return InstanceKlass::cast(k)->methods()->length(); 2273 JVM_END 2274 2275 2276 // The following methods, used for the verifier, are never called with 2277 // array klasses, so a direct cast to InstanceKlass is safe. 2278 // Typically, these methods are called in a loop with bounds determined 2279 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2280 // zero for arrays. 2281 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2282 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2283 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2284 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2285 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2286 int length = method->checked_exceptions_length(); 2287 if (length > 0) { 2288 CheckedExceptionElement* table= method->checked_exceptions_start(); 2289 for (int i = 0; i < length; i++) { 2290 exceptions[i] = table[i].class_cp_index; 2291 } 2292 } 2293 JVM_END 2294 2295 2296 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2297 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2300 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2301 return method->checked_exceptions_length(); 2302 JVM_END 2303 2304 2305 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2306 JVMWrapper("JVM_GetMethodIxByteCode"); 2307 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2308 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2309 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2310 memcpy(code, method->code_base(), method->code_size()); 2311 JVM_END 2312 2313 2314 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2315 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2316 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2317 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2318 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2319 return method->code_size(); 2320 JVM_END 2321 2322 2323 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2324 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2327 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2328 ExceptionTable extable(method); 2329 entry->start_pc = extable.start_pc(entry_index); 2330 entry->end_pc = extable.end_pc(entry_index); 2331 entry->handler_pc = extable.handler_pc(entry_index); 2332 entry->catchType = extable.catch_type_index(entry_index); 2333 JVM_END 2334 2335 2336 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2337 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2338 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2340 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2341 return method->exception_table_length(); 2342 JVM_END 2343 2344 2345 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2346 JVMWrapper("JVM_GetMethodIxModifiers"); 2347 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2348 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2349 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2350 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2351 JVM_END 2352 2353 2354 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2355 JVMWrapper("JVM_GetFieldIxModifiers"); 2356 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2357 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2358 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2359 JVM_END 2360 2361 2362 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2363 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2364 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2365 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2366 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2367 return method->max_locals(); 2368 JVM_END 2369 2370 2371 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2372 JVMWrapper("JVM_GetMethodIxArgsSize"); 2373 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2374 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2375 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2376 return method->size_of_parameters(); 2377 JVM_END 2378 2379 2380 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2381 JVMWrapper("JVM_GetMethodIxMaxStack"); 2382 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2383 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2384 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2385 return method->verifier_max_stack(); 2386 JVM_END 2387 2388 2389 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2390 JVMWrapper("JVM_IsConstructorIx"); 2391 ResourceMark rm(THREAD); 2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2395 return method->name() == vmSymbols::object_initializer_name(); 2396 JVM_END 2397 2398 2399 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2400 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2401 ResourceMark rm(THREAD); 2402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2404 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2405 return method->is_overpass(); 2406 JVM_END 2407 2408 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2409 JVMWrapper("JVM_GetMethodIxIxUTF"); 2410 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2411 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2412 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2413 return method->name()->as_utf8(); 2414 JVM_END 2415 2416 2417 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2418 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2422 return method->signature()->as_utf8(); 2423 JVM_END 2424 2425 /** 2426 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2427 * read entries in the constant pool. Since the old verifier always 2428 * works on a copy of the code, it will not see any rewriting that 2429 * may possibly occur in the middle of verification. So it is important 2430 * that nothing it calls tries to use the cpCache instead of the raw 2431 * constant pool, so we must use cp->uncached_x methods when appropriate. 2432 */ 2433 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2434 JVMWrapper("JVM_GetCPFieldNameUTF"); 2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2437 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2438 switch (cp->tag_at(cp_index).value()) { 2439 case JVM_CONSTANT_Fieldref: 2440 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2441 default: 2442 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2443 } 2444 ShouldNotReachHere(); 2445 return NULL; 2446 JVM_END 2447 2448 2449 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2450 JVMWrapper("JVM_GetCPMethodNameUTF"); 2451 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2452 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2453 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2454 switch (cp->tag_at(cp_index).value()) { 2455 case JVM_CONSTANT_InterfaceMethodref: 2456 case JVM_CONSTANT_Methodref: 2457 case JVM_CONSTANT_NameAndType: // for invokedynamic 2458 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2459 default: 2460 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2461 } 2462 ShouldNotReachHere(); 2463 return NULL; 2464 JVM_END 2465 2466 2467 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2468 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2471 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2472 switch (cp->tag_at(cp_index).value()) { 2473 case JVM_CONSTANT_InterfaceMethodref: 2474 case JVM_CONSTANT_Methodref: 2475 case JVM_CONSTANT_NameAndType: // for invokedynamic 2476 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2477 default: 2478 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2479 } 2480 ShouldNotReachHere(); 2481 return NULL; 2482 JVM_END 2483 2484 2485 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2486 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2488 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2489 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2490 switch (cp->tag_at(cp_index).value()) { 2491 case JVM_CONSTANT_Fieldref: 2492 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2493 default: 2494 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2495 } 2496 ShouldNotReachHere(); 2497 return NULL; 2498 JVM_END 2499 2500 2501 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2502 JVMWrapper("JVM_GetCPClassNameUTF"); 2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2505 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2506 Symbol* classname = cp->klass_name_at(cp_index); 2507 return classname->as_utf8(); 2508 JVM_END 2509 2510 2511 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2512 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2515 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2516 switch (cp->tag_at(cp_index).value()) { 2517 case JVM_CONSTANT_Fieldref: { 2518 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2519 Symbol* classname = cp->klass_name_at(class_index); 2520 return classname->as_utf8(); 2521 } 2522 default: 2523 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2524 } 2525 ShouldNotReachHere(); 2526 return NULL; 2527 JVM_END 2528 2529 2530 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2531 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2534 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2535 switch (cp->tag_at(cp_index).value()) { 2536 case JVM_CONSTANT_Methodref: 2537 case JVM_CONSTANT_InterfaceMethodref: { 2538 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2539 Symbol* classname = cp->klass_name_at(class_index); 2540 return classname->as_utf8(); 2541 } 2542 default: 2543 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2544 } 2545 ShouldNotReachHere(); 2546 return NULL; 2547 JVM_END 2548 2549 2550 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2551 JVMWrapper("JVM_GetCPFieldModifiers"); 2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2553 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2554 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2555 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2556 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2557 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2558 switch (cp->tag_at(cp_index).value()) { 2559 case JVM_CONSTANT_Fieldref: { 2560 Symbol* name = cp->uncached_name_ref_at(cp_index); 2561 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2562 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2563 if (fs.name() == name && fs.signature() == signature) { 2564 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2565 } 2566 } 2567 return -1; 2568 } 2569 default: 2570 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2571 } 2572 ShouldNotReachHere(); 2573 return 0; 2574 JVM_END 2575 2576 2577 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2578 JVMWrapper("JVM_GetCPMethodModifiers"); 2579 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2580 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2581 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2582 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2583 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2584 switch (cp->tag_at(cp_index).value()) { 2585 case JVM_CONSTANT_Methodref: 2586 case JVM_CONSTANT_InterfaceMethodref: { 2587 Symbol* name = cp->uncached_name_ref_at(cp_index); 2588 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2589 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2590 int methods_count = methods->length(); 2591 for (int i = 0; i < methods_count; i++) { 2592 Method* method = methods->at(i); 2593 if (method->name() == name && method->signature() == signature) { 2594 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2595 } 2596 } 2597 return -1; 2598 } 2599 default: 2600 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2601 } 2602 ShouldNotReachHere(); 2603 return 0; 2604 JVM_END 2605 2606 2607 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2608 2609 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2610 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2611 JVM_END 2612 2613 2614 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2615 JVMWrapper("JVM_IsSameClassPackage"); 2616 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2617 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2618 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2619 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2620 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2621 JVM_END 2622 2623 2624 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2625 2626 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2627 JVMWrapper2("JVM_Open (%s)", fname); 2628 2629 //%note jvm_r6 2630 int result = os::open(fname, flags, mode); 2631 if (result >= 0) { 2632 return result; 2633 } else { 2634 switch(errno) { 2635 case EEXIST: 2636 return JVM_EEXIST; 2637 default: 2638 return -1; 2639 } 2640 } 2641 JVM_END 2642 2643 2644 JVM_LEAF(jint, JVM_Close(jint fd)) 2645 JVMWrapper2("JVM_Close (0x%x)", fd); 2646 //%note jvm_r6 2647 return os::close(fd); 2648 JVM_END 2649 2650 2651 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2652 JVMWrapper2("JVM_Read (0x%x)", fd); 2653 2654 //%note jvm_r6 2655 return (jint)os::restartable_read(fd, buf, nbytes); 2656 JVM_END 2657 2658 2659 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2660 JVMWrapper2("JVM_Write (0x%x)", fd); 2661 2662 //%note jvm_r6 2663 return (jint)os::write(fd, buf, nbytes); 2664 JVM_END 2665 2666 2667 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2668 JVMWrapper2("JVM_Available (0x%x)", fd); 2669 //%note jvm_r6 2670 return os::available(fd, pbytes); 2671 JVM_END 2672 2673 2674 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2675 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2676 //%note jvm_r6 2677 return os::lseek(fd, offset, whence); 2678 JVM_END 2679 2680 2681 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2682 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2683 return os::ftruncate(fd, length); 2684 JVM_END 2685 2686 2687 JVM_LEAF(jint, JVM_Sync(jint fd)) 2688 JVMWrapper2("JVM_Sync (0x%x)", fd); 2689 //%note jvm_r6 2690 return os::fsync(fd); 2691 JVM_END 2692 2693 2694 // Printing support ////////////////////////////////////////////////// 2695 extern "C" { 2696 2697 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2698 // see bug 4399518, 4417214 2699 if ((intptr_t)count <= 0) return -1; 2700 return vsnprintf(str, count, fmt, args); 2701 } 2702 2703 2704 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2705 va_list args; 2706 int len; 2707 va_start(args, fmt); 2708 len = jio_vsnprintf(str, count, fmt, args); 2709 va_end(args); 2710 return len; 2711 } 2712 2713 2714 int jio_fprintf(FILE* f, const char *fmt, ...) { 2715 int len; 2716 va_list args; 2717 va_start(args, fmt); 2718 len = jio_vfprintf(f, fmt, args); 2719 va_end(args); 2720 return len; 2721 } 2722 2723 2724 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2725 if (Arguments::vfprintf_hook() != NULL) { 2726 return Arguments::vfprintf_hook()(f, fmt, args); 2727 } else { 2728 return vfprintf(f, fmt, args); 2729 } 2730 } 2731 2732 2733 JNIEXPORT int jio_printf(const char *fmt, ...) { 2734 int len; 2735 va_list args; 2736 va_start(args, fmt); 2737 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2738 va_end(args); 2739 return len; 2740 } 2741 2742 2743 // HotSpot specific jio method 2744 void jio_print(const char* s) { 2745 // Try to make this function as atomic as possible. 2746 if (Arguments::vfprintf_hook() != NULL) { 2747 jio_fprintf(defaultStream::output_stream(), "%s", s); 2748 } else { 2749 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2750 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2751 } 2752 } 2753 2754 } // Extern C 2755 2756 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2757 2758 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2759 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2760 // OSThread objects. The exception to this rule is when the target object is the thread 2761 // doing the operation, in which case we know that the thread won't exit until the 2762 // operation is done (all exits being voluntary). There are a few cases where it is 2763 // rather silly to do operations on yourself, like resuming yourself or asking whether 2764 // you are alive. While these can still happen, they are not subject to deadlocks if 2765 // the lock is held while the operation occurs (this is not the case for suspend, for 2766 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2767 // implementation is local to this file, we always lock Threads_lock for that one. 2768 2769 static void thread_entry(JavaThread* thread, TRAPS) { 2770 HandleMark hm(THREAD); 2771 Handle obj(THREAD, thread->threadObj()); 2772 JavaValue result(T_VOID); 2773 JavaCalls::call_virtual(&result, 2774 obj, 2775 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2776 vmSymbols::run_method_name(), 2777 vmSymbols::void_method_signature(), 2778 THREAD); 2779 } 2780 2781 2782 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2783 JVMWrapper("JVM_StartThread"); 2784 JavaThread *native_thread = NULL; 2785 2786 // We cannot hold the Threads_lock when we throw an exception, 2787 // due to rank ordering issues. Example: we might need to grab the 2788 // Heap_lock while we construct the exception. 2789 bool throw_illegal_thread_state = false; 2790 2791 // We must release the Threads_lock before we can post a jvmti event 2792 // in Thread::start. 2793 { 2794 // Ensure that the C++ Thread and OSThread structures aren't freed before 2795 // we operate. 2796 MutexLocker mu(Threads_lock); 2797 2798 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2799 // re-starting an already started thread, so we should usually find 2800 // that the JavaThread is null. However for a JNI attached thread 2801 // there is a small window between the Thread object being created 2802 // (with its JavaThread set) and the update to its threadStatus, so we 2803 // have to check for this 2804 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2805 throw_illegal_thread_state = true; 2806 } else { 2807 // We could also check the stillborn flag to see if this thread was already stopped, but 2808 // for historical reasons we let the thread detect that itself when it starts running 2809 2810 jlong size = 2811 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2812 // Allocate the C++ Thread structure and create the native thread. The 2813 // stack size retrieved from java is signed, but the constructor takes 2814 // size_t (an unsigned type), so avoid passing negative values which would 2815 // result in really large stacks. 2816 size_t sz = size > 0 ? (size_t) size : 0; 2817 native_thread = new JavaThread(&thread_entry, sz); 2818 2819 // At this point it may be possible that no osthread was created for the 2820 // JavaThread due to lack of memory. Check for this situation and throw 2821 // an exception if necessary. Eventually we may want to change this so 2822 // that we only grab the lock if the thread was created successfully - 2823 // then we can also do this check and throw the exception in the 2824 // JavaThread constructor. 2825 if (native_thread->osthread() != NULL) { 2826 // Note: the current thread is not being used within "prepare". 2827 native_thread->prepare(jthread); 2828 } 2829 } 2830 } 2831 2832 if (throw_illegal_thread_state) { 2833 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2834 } 2835 2836 assert(native_thread != NULL, "Starting null thread?"); 2837 2838 if (native_thread->osthread() == NULL) { 2839 // No one should hold a reference to the 'native_thread'. 2840 delete native_thread; 2841 if (JvmtiExport::should_post_resource_exhausted()) { 2842 JvmtiExport::post_resource_exhausted( 2843 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2844 "unable to create new native thread"); 2845 } 2846 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2847 "unable to create new native thread"); 2848 } 2849 2850 Thread::start(native_thread); 2851 2852 JVM_END 2853 2854 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2855 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2856 // but is thought to be reliable and simple. In the case, where the receiver is the 2857 // same thread as the sender, no safepoint is needed. 2858 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2859 JVMWrapper("JVM_StopThread"); 2860 2861 oop java_throwable = JNIHandles::resolve(throwable); 2862 if (java_throwable == NULL) { 2863 THROW(vmSymbols::java_lang_NullPointerException()); 2864 } 2865 oop java_thread = JNIHandles::resolve_non_null(jthread); 2866 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2867 Events::log_exception(JavaThread::current(), 2868 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2869 receiver, (address)java_thread, throwable); 2870 // First check if thread is alive 2871 if (receiver != NULL) { 2872 // Check if exception is getting thrown at self (use oop equality, since the 2873 // target object might exit) 2874 if (java_thread == thread->threadObj()) { 2875 THROW_OOP(java_throwable); 2876 } else { 2877 // Enques a VM_Operation to stop all threads and then deliver the exception... 2878 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2879 } 2880 } 2881 else { 2882 // Either: 2883 // - target thread has not been started before being stopped, or 2884 // - target thread already terminated 2885 // We could read the threadStatus to determine which case it is 2886 // but that is overkill as it doesn't matter. We must set the 2887 // stillborn flag for the first case, and if the thread has already 2888 // exited setting this flag has no affect 2889 java_lang_Thread::set_stillborn(java_thread); 2890 } 2891 JVM_END 2892 2893 2894 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2895 JVMWrapper("JVM_IsThreadAlive"); 2896 2897 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2898 return java_lang_Thread::is_alive(thread_oop); 2899 JVM_END 2900 2901 2902 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2903 JVMWrapper("JVM_SuspendThread"); 2904 oop java_thread = JNIHandles::resolve_non_null(jthread); 2905 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2906 2907 if (receiver != NULL) { 2908 // thread has run and has not exited (still on threads list) 2909 2910 { 2911 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2912 if (receiver->is_external_suspend()) { 2913 // Don't allow nested external suspend requests. We can't return 2914 // an error from this interface so just ignore the problem. 2915 return; 2916 } 2917 if (receiver->is_exiting()) { // thread is in the process of exiting 2918 return; 2919 } 2920 receiver->set_external_suspend(); 2921 } 2922 2923 // java_suspend() will catch threads in the process of exiting 2924 // and will ignore them. 2925 receiver->java_suspend(); 2926 2927 // It would be nice to have the following assertion in all the 2928 // time, but it is possible for a racing resume request to have 2929 // resumed this thread right after we suspended it. Temporarily 2930 // enable this assertion if you are chasing a different kind of 2931 // bug. 2932 // 2933 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2934 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2935 } 2936 JVM_END 2937 2938 2939 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2940 JVMWrapper("JVM_ResumeThread"); 2941 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2942 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2943 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2944 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2945 // looks at it. 2946 MutexLocker ml(Threads_lock); 2947 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2948 if (thr != NULL) { 2949 // the thread has run and is not in the process of exiting 2950 thr->java_resume(); 2951 } 2952 JVM_END 2953 2954 2955 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2956 JVMWrapper("JVM_SetThreadPriority"); 2957 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2958 MutexLocker ml(Threads_lock); 2959 oop java_thread = JNIHandles::resolve_non_null(jthread); 2960 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2961 JavaThread* thr = java_lang_Thread::thread(java_thread); 2962 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2963 Thread::set_priority(thr, (ThreadPriority)prio); 2964 } 2965 JVM_END 2966 2967 2968 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2969 JVMWrapper("JVM_Yield"); 2970 if (os::dont_yield()) return; 2971 #ifndef USDT2 2972 HS_DTRACE_PROBE0(hotspot, thread__yield); 2973 #else /* USDT2 */ 2974 HOTSPOT_THREAD_YIELD(); 2975 #endif /* USDT2 */ 2976 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2977 // Critical for similar threading behaviour 2978 if (ConvertYieldToSleep) { 2979 os::sleep(thread, MinSleepInterval, false); 2980 } else { 2981 os::yield(); 2982 } 2983 JVM_END 2984 2985 2986 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2987 JVMWrapper("JVM_Sleep"); 2988 2989 if (millis < 0) { 2990 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2991 } 2992 2993 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2994 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2995 } 2996 2997 // Save current thread state and restore it at the end of this block. 2998 // And set new thread state to SLEEPING. 2999 JavaThreadSleepState jtss(thread); 3000 3001 #ifndef USDT2 3002 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 3003 #else /* USDT2 */ 3004 HOTSPOT_THREAD_SLEEP_BEGIN( 3005 millis); 3006 #endif /* USDT2 */ 3007 3008 if (millis == 0) { 3009 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3010 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3011 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3012 // for SOLARIS 3013 if (ConvertSleepToYield) { 3014 os::yield(); 3015 } else { 3016 ThreadState old_state = thread->osthread()->get_state(); 3017 thread->osthread()->set_state(SLEEPING); 3018 os::sleep(thread, MinSleepInterval, false); 3019 thread->osthread()->set_state(old_state); 3020 } 3021 } else { 3022 ThreadState old_state = thread->osthread()->get_state(); 3023 thread->osthread()->set_state(SLEEPING); 3024 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3025 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3026 // us while we were sleeping. We do not overwrite those. 3027 if (!HAS_PENDING_EXCEPTION) { 3028 #ifndef USDT2 3029 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 3030 #else /* USDT2 */ 3031 HOTSPOT_THREAD_SLEEP_END( 3032 1); 3033 #endif /* USDT2 */ 3034 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3035 // to properly restore the thread state. That's likely wrong. 3036 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3037 } 3038 } 3039 thread->osthread()->set_state(old_state); 3040 } 3041 #ifndef USDT2 3042 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 3043 #else /* USDT2 */ 3044 HOTSPOT_THREAD_SLEEP_END( 3045 0); 3046 #endif /* USDT2 */ 3047 JVM_END 3048 3049 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3050 JVMWrapper("JVM_CurrentThread"); 3051 oop jthread = thread->threadObj(); 3052 assert (thread != NULL, "no current thread!"); 3053 return JNIHandles::make_local(env, jthread); 3054 JVM_END 3055 3056 3057 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3058 JVMWrapper("JVM_CountStackFrames"); 3059 3060 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3061 oop java_thread = JNIHandles::resolve_non_null(jthread); 3062 bool throw_illegal_thread_state = false; 3063 int count = 0; 3064 3065 { 3066 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3067 // We need to re-resolve the java_thread, since a GC might have happened during the 3068 // acquire of the lock 3069 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3070 3071 if (thr == NULL) { 3072 // do nothing 3073 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3074 // Check whether this java thread has been suspended already. If not, throws 3075 // IllegalThreadStateException. We defer to throw that exception until 3076 // Threads_lock is released since loading exception class has to leave VM. 3077 // The correct way to test a thread is actually suspended is 3078 // wait_for_ext_suspend_completion(), but we can't call that while holding 3079 // the Threads_lock. The above tests are sufficient for our purposes 3080 // provided the walkability of the stack is stable - which it isn't 3081 // 100% but close enough for most practical purposes. 3082 throw_illegal_thread_state = true; 3083 } else { 3084 // Count all java activation, i.e., number of vframes 3085 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3086 // Native frames are not counted 3087 if (!vfst.method()->is_native()) count++; 3088 } 3089 } 3090 } 3091 3092 if (throw_illegal_thread_state) { 3093 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3094 "this thread is not suspended"); 3095 } 3096 return count; 3097 JVM_END 3098 3099 // Consider: A better way to implement JVM_Interrupt() is to acquire 3100 // Threads_lock to resolve the jthread into a Thread pointer, fetch 3101 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3102 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 3103 // outside the critical section. Threads_lock is hot so we want to minimize 3104 // the hold-time. A cleaner interface would be to decompose interrupt into 3105 // two steps. The 1st phase, performed under Threads_lock, would return 3106 // a closure that'd be invoked after Threads_lock was dropped. 3107 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3108 // admit spurious wakeups. 3109 3110 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3111 JVMWrapper("JVM_Interrupt"); 3112 3113 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3114 oop java_thread = JNIHandles::resolve_non_null(jthread); 3115 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3116 // We need to re-resolve the java_thread, since a GC might have happened during the 3117 // acquire of the lock 3118 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3119 if (thr != NULL) { 3120 Thread::interrupt(thr); 3121 } 3122 JVM_END 3123 3124 3125 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3126 JVMWrapper("JVM_IsInterrupted"); 3127 3128 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3129 oop java_thread = JNIHandles::resolve_non_null(jthread); 3130 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3131 // We need to re-resolve the java_thread, since a GC might have happened during the 3132 // acquire of the lock 3133 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3134 if (thr == NULL) { 3135 return JNI_FALSE; 3136 } else { 3137 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3138 } 3139 JVM_END 3140 3141 3142 // Return true iff the current thread has locked the object passed in 3143 3144 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3145 JVMWrapper("JVM_HoldsLock"); 3146 assert(THREAD->is_Java_thread(), "sanity check"); 3147 if (obj == NULL) { 3148 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3149 } 3150 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3151 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3152 JVM_END 3153 3154 3155 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3156 JVMWrapper("JVM_DumpAllStacks"); 3157 VM_PrintThreads op; 3158 VMThread::execute(&op); 3159 if (JvmtiExport::should_post_data_dump()) { 3160 JvmtiExport::post_data_dump(); 3161 } 3162 JVM_END 3163 3164 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3165 JVMWrapper("JVM_SetNativeThreadName"); 3166 ResourceMark rm(THREAD); 3167 oop java_thread = JNIHandles::resolve_non_null(jthread); 3168 JavaThread* thr = java_lang_Thread::thread(java_thread); 3169 // Thread naming only supported for the current thread, doesn't work for 3170 // target threads. 3171 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3172 // we don't set the name of an attached thread to avoid stepping 3173 // on other programs 3174 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3175 os::set_native_thread_name(thread_name); 3176 } 3177 JVM_END 3178 3179 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3180 3181 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3182 assert(jthread->is_Java_thread(), "must be a Java thread"); 3183 if (jthread->privileged_stack_top() == NULL) return false; 3184 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3185 oop loader = jthread->privileged_stack_top()->class_loader(); 3186 if (loader == NULL) return true; 3187 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3188 if (trusted) return true; 3189 } 3190 return false; 3191 } 3192 3193 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3194 JVMWrapper("JVM_CurrentLoadedClass"); 3195 ResourceMark rm(THREAD); 3196 3197 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3198 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3199 bool trusted = is_trusted_frame(thread, &vfst); 3200 if (trusted) return NULL; 3201 3202 Method* m = vfst.method(); 3203 if (!m->is_native()) { 3204 InstanceKlass* holder = m->method_holder(); 3205 oop loader = holder->class_loader(); 3206 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3207 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3208 } 3209 } 3210 } 3211 return NULL; 3212 JVM_END 3213 3214 3215 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3216 JVMWrapper("JVM_CurrentClassLoader"); 3217 ResourceMark rm(THREAD); 3218 3219 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3220 3221 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3222 bool trusted = is_trusted_frame(thread, &vfst); 3223 if (trusted) return NULL; 3224 3225 Method* m = vfst.method(); 3226 if (!m->is_native()) { 3227 InstanceKlass* holder = m->method_holder(); 3228 assert(holder->is_klass(), "just checking"); 3229 oop loader = holder->class_loader(); 3230 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3231 return JNIHandles::make_local(env, loader); 3232 } 3233 } 3234 } 3235 return NULL; 3236 JVM_END 3237 3238 3239 // Utility object for collecting method holders walking down the stack 3240 class KlassLink: public ResourceObj { 3241 public: 3242 KlassHandle klass; 3243 KlassLink* next; 3244 3245 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3246 }; 3247 3248 3249 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3250 JVMWrapper("JVM_GetClassContext"); 3251 ResourceMark rm(THREAD); 3252 JvmtiVMObjectAllocEventCollector oam; 3253 // Collect linked list of (handles to) method holders 3254 KlassLink* first = NULL; 3255 KlassLink* last = NULL; 3256 int depth = 0; 3257 vframeStream vfst(thread); 3258 3259 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3260 // This must only be called from SecurityManager.getClassContext 3261 Method* m = vfst.method(); 3262 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3263 m->name() == vmSymbols::getClassContext_name() && 3264 m->signature() == vmSymbols::void_class_array_signature())) { 3265 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3266 } 3267 } 3268 3269 // Collect method holders 3270 for (; !vfst.at_end(); vfst.security_next()) { 3271 Method* m = vfst.method(); 3272 // Native frames are not returned 3273 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3274 Klass* holder = m->method_holder(); 3275 assert(holder->is_klass(), "just checking"); 3276 depth++; 3277 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3278 if (first == NULL) { 3279 first = last = l; 3280 } else { 3281 last->next = l; 3282 last = l; 3283 } 3284 } 3285 } 3286 3287 // Create result array of type [Ljava/lang/Class; 3288 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3289 // Fill in mirrors corresponding to method holders 3290 int index = 0; 3291 while (first != NULL) { 3292 result->obj_at_put(index++, first->klass()->java_mirror()); 3293 first = first->next; 3294 } 3295 assert(index == depth, "just checking"); 3296 3297 return (jobjectArray) JNIHandles::make_local(env, result); 3298 JVM_END 3299 3300 3301 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3302 JVMWrapper("JVM_ClassDepth"); 3303 ResourceMark rm(THREAD); 3304 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3305 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3306 3307 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3308 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3309 if (class_name_sym == NULL) { 3310 return -1; 3311 } 3312 3313 int depth = 0; 3314 3315 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3316 if (!vfst.method()->is_native()) { 3317 InstanceKlass* holder = vfst.method()->method_holder(); 3318 assert(holder->is_klass(), "just checking"); 3319 if (holder->name() == class_name_sym) { 3320 return depth; 3321 } 3322 depth++; 3323 } 3324 } 3325 return -1; 3326 JVM_END 3327 3328 3329 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3330 JVMWrapper("JVM_ClassLoaderDepth"); 3331 ResourceMark rm(THREAD); 3332 int depth = 0; 3333 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3334 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3335 bool trusted = is_trusted_frame(thread, &vfst); 3336 if (trusted) return -1; 3337 3338 Method* m = vfst.method(); 3339 if (!m->is_native()) { 3340 InstanceKlass* holder = m->method_holder(); 3341 assert(holder->is_klass(), "just checking"); 3342 oop loader = holder->class_loader(); 3343 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3344 return depth; 3345 } 3346 depth++; 3347 } 3348 } 3349 return -1; 3350 JVM_END 3351 3352 3353 // java.lang.Package //////////////////////////////////////////////////////////////// 3354 3355 3356 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3357 JVMWrapper("JVM_GetSystemPackage"); 3358 ResourceMark rm(THREAD); 3359 JvmtiVMObjectAllocEventCollector oam; 3360 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3361 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3362 return (jstring) JNIHandles::make_local(result); 3363 JVM_END 3364 3365 3366 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3367 JVMWrapper("JVM_GetSystemPackages"); 3368 JvmtiVMObjectAllocEventCollector oam; 3369 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3370 return (jobjectArray) JNIHandles::make_local(result); 3371 JVM_END 3372 3373 3374 // ObjectInputStream /////////////////////////////////////////////////////////////// 3375 3376 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3377 if (current_class == NULL) { 3378 return true; 3379 } 3380 if ((current_class == field_class) || access.is_public()) { 3381 return true; 3382 } 3383 3384 if (access.is_protected()) { 3385 // See if current_class is a subclass of field_class 3386 if (current_class->is_subclass_of(field_class)) { 3387 return true; 3388 } 3389 } 3390 3391 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3392 } 3393 3394 3395 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3396 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3397 JVMWrapper("JVM_AllocateNewObject"); 3398 JvmtiVMObjectAllocEventCollector oam; 3399 // Receiver is not used 3400 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3401 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3402 3403 // Cannot instantiate primitive types 3404 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3405 ResourceMark rm(THREAD); 3406 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3407 } 3408 3409 // Arrays not allowed here, must use JVM_AllocateNewArray 3410 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3411 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3412 ResourceMark rm(THREAD); 3413 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3414 } 3415 3416 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3417 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3418 3419 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3420 3421 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3422 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3423 3424 // Make sure klass is initialized, since we are about to instantiate one of them. 3425 curr_klass->initialize(CHECK_NULL); 3426 3427 methodHandle m (THREAD, 3428 init_klass->find_method(vmSymbols::object_initializer_name(), 3429 vmSymbols::void_method_signature())); 3430 if (m.is_null()) { 3431 ResourceMark rm(THREAD); 3432 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3433 Method::name_and_sig_as_C_string(init_klass(), 3434 vmSymbols::object_initializer_name(), 3435 vmSymbols::void_method_signature())); 3436 } 3437 3438 if (curr_klass == init_klass && !m->is_public()) { 3439 // Calling the constructor for class 'curr_klass'. 3440 // Only allow calls to a public no-arg constructor. 3441 // This path corresponds to creating an Externalizable object. 3442 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3443 } 3444 3445 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3446 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3447 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3448 } 3449 3450 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3451 // Call constructor m. This might call a constructor higher up in the hierachy 3452 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3453 3454 return JNIHandles::make_local(obj()); 3455 JVM_END 3456 3457 3458 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3459 JVMWrapper("JVM_AllocateNewArray"); 3460 JvmtiVMObjectAllocEventCollector oam; 3461 oop mirror = JNIHandles::resolve_non_null(currClass); 3462 3463 if (java_lang_Class::is_primitive(mirror)) { 3464 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3465 } 3466 Klass* k = java_lang_Class::as_Klass(mirror); 3467 oop result; 3468 3469 if (k->oop_is_typeArray()) { 3470 // typeArray 3471 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3472 } else if (k->oop_is_objArray()) { 3473 // objArray 3474 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3475 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3476 result = oak->allocate(length, CHECK_NULL); 3477 } else { 3478 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3479 } 3480 return JNIHandles::make_local(env, result); 3481 JVM_END 3482 3483 3484 // Return the first non-null class loader up the execution stack, or null 3485 // if only code from the null class loader is on the stack. 3486 3487 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3488 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3489 // UseNewReflection 3490 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3491 oop loader = vfst.method()->method_holder()->class_loader(); 3492 if (loader != NULL) { 3493 return JNIHandles::make_local(env, loader); 3494 } 3495 } 3496 return NULL; 3497 JVM_END 3498 3499 3500 // Load a class relative to the most recent class on the stack with a non-null 3501 // classloader. 3502 // This function has been deprecated and should not be considered part of the 3503 // specified JVM interface. 3504 3505 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3506 jclass currClass, jstring currClassName)) 3507 JVMWrapper("JVM_LoadClass0"); 3508 // Receiver is not used 3509 ResourceMark rm(THREAD); 3510 3511 // Class name argument is not guaranteed to be in internal format 3512 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3513 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3514 3515 const char* str = java_lang_String::as_utf8_string(string()); 3516 3517 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3518 // It's impossible to create this class; the name cannot fit 3519 // into the constant pool. 3520 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3521 } 3522 3523 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3524 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3525 // Find the most recent class on the stack with a non-null classloader 3526 oop loader = NULL; 3527 oop protection_domain = NULL; 3528 if (curr_klass.is_null()) { 3529 for (vframeStream vfst(thread); 3530 !vfst.at_end() && loader == NULL; 3531 vfst.next()) { 3532 if (!vfst.method()->is_native()) { 3533 InstanceKlass* holder = vfst.method()->method_holder(); 3534 loader = holder->class_loader(); 3535 protection_domain = holder->protection_domain(); 3536 } 3537 } 3538 } else { 3539 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3540 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3541 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3542 } 3543 Handle h_loader(THREAD, loader); 3544 Handle h_prot (THREAD, protection_domain); 3545 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3546 false, thread); 3547 if (TraceClassResolution && result != NULL) { 3548 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3549 } 3550 return result; 3551 JVM_END 3552 3553 3554 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3555 3556 3557 // resolve array handle and check arguments 3558 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3559 if (arr == NULL) { 3560 THROW_0(vmSymbols::java_lang_NullPointerException()); 3561 } 3562 oop a = JNIHandles::resolve_non_null(arr); 3563 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3564 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3565 } 3566 return arrayOop(a); 3567 } 3568 3569 3570 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3571 JVMWrapper("JVM_GetArrayLength"); 3572 arrayOop a = check_array(env, arr, false, CHECK_0); 3573 return a->length(); 3574 JVM_END 3575 3576 3577 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3578 JVMWrapper("JVM_Array_Get"); 3579 JvmtiVMObjectAllocEventCollector oam; 3580 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3581 jvalue value; 3582 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3583 oop box = Reflection::box(&value, type, CHECK_NULL); 3584 return JNIHandles::make_local(env, box); 3585 JVM_END 3586 3587 3588 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3589 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3590 jvalue value; 3591 value.i = 0; // to initialize value before getting used in CHECK 3592 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3593 assert(a->is_typeArray(), "just checking"); 3594 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3595 BasicType wide_type = (BasicType) wCode; 3596 if (type != wide_type) { 3597 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3598 } 3599 return value; 3600 JVM_END 3601 3602 3603 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3604 JVMWrapper("JVM_SetArrayElement"); 3605 arrayOop a = check_array(env, arr, false, CHECK); 3606 oop box = JNIHandles::resolve(val); 3607 jvalue value; 3608 value.i = 0; // to initialize value before getting used in CHECK 3609 BasicType value_type; 3610 if (a->is_objArray()) { 3611 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3612 value_type = Reflection::unbox_for_regular_object(box, &value); 3613 } else { 3614 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3615 } 3616 Reflection::array_set(&value, a, index, value_type, CHECK); 3617 JVM_END 3618 3619 3620 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3621 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3622 arrayOop a = check_array(env, arr, true, CHECK); 3623 assert(a->is_typeArray(), "just checking"); 3624 BasicType value_type = (BasicType) vCode; 3625 Reflection::array_set(&v, a, index, value_type, CHECK); 3626 JVM_END 3627 3628 3629 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3630 JVMWrapper("JVM_NewArray"); 3631 JvmtiVMObjectAllocEventCollector oam; 3632 oop element_mirror = JNIHandles::resolve(eltClass); 3633 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3634 return JNIHandles::make_local(env, result); 3635 JVM_END 3636 3637 3638 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3639 JVMWrapper("JVM_NewMultiArray"); 3640 JvmtiVMObjectAllocEventCollector oam; 3641 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3642 oop element_mirror = JNIHandles::resolve(eltClass); 3643 assert(dim_array->is_typeArray(), "just checking"); 3644 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3645 return JNIHandles::make_local(env, result); 3646 JVM_END 3647 3648 3649 // Networking library support //////////////////////////////////////////////////////////////////// 3650 3651 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3652 JVMWrapper("JVM_InitializeSocketLibrary"); 3653 return 0; 3654 JVM_END 3655 3656 3657 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3658 JVMWrapper("JVM_Socket"); 3659 return os::socket(domain, type, protocol); 3660 JVM_END 3661 3662 3663 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3664 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3665 //%note jvm_r6 3666 return os::socket_close(fd); 3667 JVM_END 3668 3669 3670 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3671 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3672 //%note jvm_r6 3673 return os::socket_shutdown(fd, howto); 3674 JVM_END 3675 3676 3677 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3678 JVMWrapper2("JVM_Recv (0x%x)", fd); 3679 //%note jvm_r6 3680 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3681 JVM_END 3682 3683 3684 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3685 JVMWrapper2("JVM_Send (0x%x)", fd); 3686 //%note jvm_r6 3687 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3688 JVM_END 3689 3690 3691 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3692 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3693 //%note jvm_r6 3694 return os::timeout(fd, timeout); 3695 JVM_END 3696 3697 3698 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3699 JVMWrapper2("JVM_Listen (0x%x)", fd); 3700 //%note jvm_r6 3701 return os::listen(fd, count); 3702 JVM_END 3703 3704 3705 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3706 JVMWrapper2("JVM_Connect (0x%x)", fd); 3707 //%note jvm_r6 3708 return os::connect(fd, him, (socklen_t)len); 3709 JVM_END 3710 3711 3712 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3713 JVMWrapper2("JVM_Bind (0x%x)", fd); 3714 //%note jvm_r6 3715 return os::bind(fd, him, (socklen_t)len); 3716 JVM_END 3717 3718 3719 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3720 JVMWrapper2("JVM_Accept (0x%x)", fd); 3721 //%note jvm_r6 3722 socklen_t socklen = (socklen_t)(*len); 3723 jint result = os::accept(fd, him, &socklen); 3724 *len = (jint)socklen; 3725 return result; 3726 JVM_END 3727 3728 3729 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3730 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3731 //%note jvm_r6 3732 socklen_t socklen = (socklen_t)(*fromlen); 3733 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3734 *fromlen = (int)socklen; 3735 return result; 3736 JVM_END 3737 3738 3739 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3740 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3741 //%note jvm_r6 3742 socklen_t socklen = (socklen_t)(*len); 3743 jint result = os::get_sock_name(fd, him, &socklen); 3744 *len = (int)socklen; 3745 return result; 3746 JVM_END 3747 3748 3749 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3750 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3751 //%note jvm_r6 3752 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3753 JVM_END 3754 3755 3756 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3757 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3758 //%note jvm_r6 3759 return os::socket_available(fd, pbytes); 3760 JVM_END 3761 3762 3763 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3764 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3765 //%note jvm_r6 3766 socklen_t socklen = (socklen_t)(*optlen); 3767 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3768 *optlen = (int)socklen; 3769 return result; 3770 JVM_END 3771 3772 3773 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3774 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3775 //%note jvm_r6 3776 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3777 JVM_END 3778 3779 3780 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3781 JVMWrapper("JVM_GetHostName"); 3782 return os::get_host_name(name, namelen); 3783 JVM_END 3784 3785 3786 // Library support /////////////////////////////////////////////////////////////////////////// 3787 3788 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3789 //%note jvm_ct 3790 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3791 char ebuf[1024]; 3792 void *load_result; 3793 { 3794 ThreadToNativeFromVM ttnfvm(thread); 3795 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3796 } 3797 if (load_result == NULL) { 3798 char msg[1024]; 3799 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3800 // Since 'ebuf' may contain a string encoded using 3801 // platform encoding scheme, we need to pass 3802 // Exceptions::unsafe_to_utf8 to the new_exception method 3803 // as the last argument. See bug 6367357. 3804 Handle h_exception = 3805 Exceptions::new_exception(thread, 3806 vmSymbols::java_lang_UnsatisfiedLinkError(), 3807 msg, Exceptions::unsafe_to_utf8); 3808 3809 THROW_HANDLE_0(h_exception); 3810 } 3811 return load_result; 3812 JVM_END 3813 3814 3815 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3816 JVMWrapper("JVM_UnloadLibrary"); 3817 os::dll_unload(handle); 3818 JVM_END 3819 3820 3821 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3822 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3823 return os::dll_lookup(handle, name); 3824 JVM_END 3825 3826 3827 // Floating point support //////////////////////////////////////////////////////////////////// 3828 3829 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3830 JVMWrapper("JVM_IsNaN"); 3831 return g_isnan(a); 3832 JVM_END 3833 3834 3835 // JNI version /////////////////////////////////////////////////////////////////////////////// 3836 3837 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3838 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3839 return Threads::is_supported_jni_version_including_1_1(version); 3840 JVM_END 3841 3842 3843 // String support /////////////////////////////////////////////////////////////////////////// 3844 3845 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3846 JVMWrapper("JVM_InternString"); 3847 JvmtiVMObjectAllocEventCollector oam; 3848 if (str == NULL) return NULL; 3849 oop string = JNIHandles::resolve_non_null(str); 3850 oop result = StringTable::intern(string, CHECK_NULL); 3851 return (jstring) JNIHandles::make_local(env, result); 3852 JVM_END 3853 3854 3855 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3856 3857 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3858 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3859 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3860 // that only works with java threads. 3861 3862 3863 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3864 VM_Exit::block_if_vm_exited(); 3865 JVMWrapper("JVM_RawMonitorCreate"); 3866 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3867 } 3868 3869 3870 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3871 VM_Exit::block_if_vm_exited(); 3872 JVMWrapper("JVM_RawMonitorDestroy"); 3873 delete ((Mutex*) mon); 3874 } 3875 3876 3877 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3878 VM_Exit::block_if_vm_exited(); 3879 JVMWrapper("JVM_RawMonitorEnter"); 3880 ((Mutex*) mon)->jvm_raw_lock(); 3881 return 0; 3882 } 3883 3884 3885 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3886 VM_Exit::block_if_vm_exited(); 3887 JVMWrapper("JVM_RawMonitorExit"); 3888 ((Mutex*) mon)->jvm_raw_unlock(); 3889 } 3890 3891 3892 // Support for Serialization 3893 3894 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3895 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3896 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3897 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3898 3899 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3900 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3901 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3902 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3903 3904 3905 void initialize_converter_functions() { 3906 if (JDK_Version::is_gte_jdk14x_version()) { 3907 // These functions only exist for compatibility with 1.3.1 and earlier 3908 return; 3909 } 3910 3911 // called from universe_post_init() 3912 assert( 3913 int_bits_to_float_fn == NULL && 3914 long_bits_to_double_fn == NULL && 3915 float_to_int_bits_fn == NULL && 3916 double_to_long_bits_fn == NULL , 3917 "initialization done twice" 3918 ); 3919 // initialize 3920 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3921 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3922 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3923 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3924 // verify 3925 assert( 3926 int_bits_to_float_fn != NULL && 3927 long_bits_to_double_fn != NULL && 3928 float_to_int_bits_fn != NULL && 3929 double_to_long_bits_fn != NULL , 3930 "initialization failed" 3931 ); 3932 } 3933 3934 3935 // Serialization 3936 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3937 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3938 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3939 3940 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3941 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3942 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3943 oop o = JNIHandles::resolve(obj); 3944 3945 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3946 THROW(vmSymbols::java_lang_NullPointerException()); 3947 } 3948 3949 jsize nfids = fids->length(); 3950 if (nfids == 0) return; 3951 3952 if (tcodes->length() < nfids) { 3953 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3954 } 3955 3956 jsize off = 0; 3957 /* loop through fields, setting values */ 3958 for (jsize i = 0; i < nfids; i++) { 3959 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3960 int field_offset; 3961 if (fid != NULL) { 3962 // NULL is a legal value for fid, but retrieving the field offset 3963 // trigger assertion in that case 3964 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3965 } 3966 3967 switch (tcodes->char_at(i)) { 3968 case 'Z': 3969 if (fid != NULL) { 3970 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3971 o->bool_field_put(field_offset, val); 3972 } 3973 off++; 3974 break; 3975 3976 case 'B': 3977 if (fid != NULL) { 3978 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3979 } 3980 off++; 3981 break; 3982 3983 case 'C': 3984 if (fid != NULL) { 3985 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3986 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3987 o->char_field_put(field_offset, val); 3988 } 3989 off += 2; 3990 break; 3991 3992 case 'S': 3993 if (fid != NULL) { 3994 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3995 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3996 o->short_field_put(field_offset, val); 3997 } 3998 off += 2; 3999 break; 4000 4001 case 'I': 4002 if (fid != NULL) { 4003 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4004 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4005 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4006 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4007 o->int_field_put(field_offset, ival); 4008 } 4009 off += 4; 4010 break; 4011 4012 case 'F': 4013 if (fid != NULL) { 4014 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4015 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4016 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4017 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4018 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 4019 o->float_field_put(field_offset, fval); 4020 } 4021 off += 4; 4022 break; 4023 4024 case 'J': 4025 if (fid != NULL) { 4026 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4027 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4028 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4029 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4030 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4031 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4032 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4033 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4034 o->long_field_put(field_offset, lval); 4035 } 4036 off += 8; 4037 break; 4038 4039 case 'D': 4040 if (fid != NULL) { 4041 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4042 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4043 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4044 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4045 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4046 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4047 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4048 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4049 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 4050 o->double_field_put(field_offset, dval); 4051 } 4052 off += 8; 4053 break; 4054 4055 default: 4056 // Illegal typecode 4057 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4058 } 4059 } 4060 JVM_END 4061 4062 4063 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 4064 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 4065 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 4066 4067 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 4068 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 4069 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 4070 oop o = JNIHandles::resolve(obj); 4071 4072 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 4073 THROW(vmSymbols::java_lang_NullPointerException()); 4074 } 4075 4076 jsize nfids = fids->length(); 4077 if (nfids == 0) return; 4078 4079 if (tcodes->length() < nfids) { 4080 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 4081 } 4082 4083 /* loop through fields, fetching values */ 4084 jsize off = 0; 4085 for (jsize i = 0; i < nfids; i++) { 4086 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 4087 if (fid == NULL) { 4088 THROW(vmSymbols::java_lang_NullPointerException()); 4089 } 4090 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4091 4092 switch (tcodes->char_at(i)) { 4093 case 'Z': 4094 { 4095 jboolean val = o->bool_field(field_offset); 4096 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 4097 } 4098 break; 4099 4100 case 'B': 4101 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 4102 break; 4103 4104 case 'C': 4105 { 4106 jchar val = o->char_field(field_offset); 4107 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4108 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4109 } 4110 break; 4111 4112 case 'S': 4113 { 4114 jshort val = o->short_field(field_offset); 4115 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4116 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4117 } 4118 break; 4119 4120 case 'I': 4121 { 4122 jint val = o->int_field(field_offset); 4123 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4124 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4125 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4126 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4127 } 4128 break; 4129 4130 case 'F': 4131 { 4132 jfloat fval = o->float_field(field_offset); 4133 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 4134 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 4135 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 4136 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 4137 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 4138 } 4139 break; 4140 4141 case 'J': 4142 { 4143 jlong val = o->long_field(field_offset); 4144 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 4145 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 4146 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 4147 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 4148 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4149 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4150 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4151 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4152 } 4153 break; 4154 4155 case 'D': 4156 { 4157 jdouble dval = o->double_field(field_offset); 4158 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 4159 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 4160 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 4161 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 4162 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 4163 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 4164 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 4165 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 4166 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 4167 } 4168 break; 4169 4170 default: 4171 // Illegal typecode 4172 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4173 } 4174 } 4175 JVM_END 4176 4177 4178 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 4179 4180 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 4181 // Security Note: 4182 // The Java level wrapper will perform the necessary security check allowing 4183 // us to pass the NULL as the initiating class loader. 4184 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 4185 4186 KlassHandle klass_handle(THREAD, klass); 4187 // Check if we should initialize the class 4188 if (init && klass_handle->oop_is_instance()) { 4189 klass_handle->initialize(CHECK_NULL); 4190 } 4191 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 4192 } 4193 4194 4195 // Internal SQE debugging support /////////////////////////////////////////////////////////// 4196 4197 #ifndef PRODUCT 4198 4199 extern "C" { 4200 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 4201 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 4202 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 4203 } 4204 4205 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4206 JVMWrapper("JVM_AccessBoolVMFlag"); 4207 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4208 JVM_END 4209 4210 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4211 JVMWrapper("JVM_AccessVMIntFlag"); 4212 intx v; 4213 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4214 *value = (jint)v; 4215 return result; 4216 JVM_END 4217 4218 4219 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4220 JVMWrapper("JVM_VMBreakPoint"); 4221 oop the_obj = JNIHandles::resolve(obj); 4222 BREAKPOINT; 4223 JVM_END 4224 4225 4226 #endif 4227 4228 4229 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4230 4231 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4232 JVMWrapper("JVM_InvokeMethod"); 4233 Handle method_handle; 4234 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4235 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4236 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4237 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4238 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4239 jobject res = JNIHandles::make_local(env, result); 4240 if (JvmtiExport::should_post_vm_object_alloc()) { 4241 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4242 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4243 if (java_lang_Class::is_primitive(ret_type)) { 4244 // Only for primitive type vm allocates memory for java object. 4245 // See box() method. 4246 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4247 } 4248 } 4249 return res; 4250 } else { 4251 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4252 } 4253 JVM_END 4254 4255 4256 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4257 JVMWrapper("JVM_NewInstanceFromConstructor"); 4258 oop constructor_mirror = JNIHandles::resolve(c); 4259 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4260 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4261 jobject res = JNIHandles::make_local(env, result); 4262 if (JvmtiExport::should_post_vm_object_alloc()) { 4263 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4264 } 4265 return res; 4266 JVM_END 4267 4268 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4269 4270 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4271 JVMWrapper("JVM_SupportsCX8"); 4272 return VM_Version::supports_cx8(); 4273 JVM_END 4274 4275 4276 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4277 JVMWrapper("JVM_CX8Field"); 4278 jlong res; 4279 oop o = JNIHandles::resolve(obj); 4280 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4281 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4282 4283 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4284 res = Atomic::cmpxchg(newVal, addr, oldVal); 4285 4286 return res == oldVal; 4287 JVM_END 4288 4289 // DTrace /////////////////////////////////////////////////////////////////// 4290 4291 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4292 JVMWrapper("JVM_DTraceGetVersion"); 4293 return (jint)JVM_TRACING_DTRACE_VERSION; 4294 JVM_END 4295 4296 JVM_ENTRY(jlong,JVM_DTraceActivate( 4297 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4298 JVM_DTraceProvider* providers)) 4299 JVMWrapper("JVM_DTraceActivate"); 4300 return DTraceJSDT::activate( 4301 version, module_name, providers_count, providers, CHECK_0); 4302 JVM_END 4303 4304 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4305 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4306 return DTraceJSDT::is_probe_enabled(method); 4307 JVM_END 4308 4309 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4310 JVMWrapper("JVM_DTraceDispose"); 4311 DTraceJSDT::dispose(handle); 4312 JVM_END 4313 4314 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4315 JVMWrapper("JVM_DTraceIsSupported"); 4316 return DTraceJSDT::is_supported(); 4317 JVM_END 4318 4319 // Returns an array of all live Thread objects (VM internal JavaThreads, 4320 // jvmti agent threads, and JNI attaching threads are skipped) 4321 // See CR 6404306 regarding JNI attaching threads 4322 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4323 ResourceMark rm(THREAD); 4324 ThreadsListEnumerator tle(THREAD, false, false); 4325 JvmtiVMObjectAllocEventCollector oam; 4326 4327 int num_threads = tle.num_threads(); 4328 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4329 objArrayHandle threads_ah(THREAD, r); 4330 4331 for (int i = 0; i < num_threads; i++) { 4332 Handle h = tle.get_threadObj(i); 4333 threads_ah->obj_at_put(i, h()); 4334 } 4335 4336 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4337 JVM_END 4338 4339 4340 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4341 // Return StackTraceElement[][], each element is the stack trace of a thread in 4342 // the corresponding entry in the given threads array 4343 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4344 JVMWrapper("JVM_DumpThreads"); 4345 JvmtiVMObjectAllocEventCollector oam; 4346 4347 // Check if threads is null 4348 if (threads == NULL) { 4349 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4350 } 4351 4352 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4353 objArrayHandle ah(THREAD, a); 4354 int num_threads = ah->length(); 4355 // check if threads is non-empty array 4356 if (num_threads == 0) { 4357 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4358 } 4359 4360 // check if threads is not an array of objects of Thread class 4361 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4362 if (k != SystemDictionary::Thread_klass()) { 4363 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4364 } 4365 4366 ResourceMark rm(THREAD); 4367 4368 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4369 for (int i = 0; i < num_threads; i++) { 4370 oop thread_obj = ah->obj_at(i); 4371 instanceHandle h(THREAD, (instanceOop) thread_obj); 4372 thread_handle_array->append(h); 4373 } 4374 4375 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4376 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4377 4378 JVM_END 4379 4380 // JVM monitoring and management support 4381 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4382 return Management::get_jmm_interface(version); 4383 JVM_END 4384 4385 // com.sun.tools.attach.VirtualMachine agent properties support 4386 // 4387 // Initialize the agent properties with the properties maintained in the VM 4388 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4389 JVMWrapper("JVM_InitAgentProperties"); 4390 ResourceMark rm; 4391 4392 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4393 4394 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4395 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4396 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4397 return properties; 4398 JVM_END 4399 4400 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4401 { 4402 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4403 JvmtiVMObjectAllocEventCollector oam; 4404 4405 if (ofClass == NULL) { 4406 return NULL; 4407 } 4408 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4409 // Special handling for primitive objects 4410 if (java_lang_Class::is_primitive(mirror())) { 4411 return NULL; 4412 } 4413 Klass* k = java_lang_Class::as_Klass(mirror()); 4414 if (!k->oop_is_instance()) { 4415 return NULL; 4416 } 4417 instanceKlassHandle ik_h(THREAD, k); 4418 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4419 if (encl_method_class_idx == 0) { 4420 return NULL; 4421 } 4422 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4423 objArrayHandle dest(THREAD, dest_o); 4424 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4425 dest->obj_at_put(0, enc_k->java_mirror()); 4426 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4427 if (encl_method_method_idx != 0) { 4428 Symbol* sym = ik_h->constants()->symbol_at( 4429 extract_low_short_from_int( 4430 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4431 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4432 dest->obj_at_put(1, str()); 4433 sym = ik_h->constants()->symbol_at( 4434 extract_high_short_from_int( 4435 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4436 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4437 dest->obj_at_put(2, str()); 4438 } 4439 return (jobjectArray) JNIHandles::make_local(dest()); 4440 } 4441 JVM_END 4442 4443 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4444 jint javaThreadState)) 4445 { 4446 // If new thread states are added in future JDK and VM versions, 4447 // this should check if the JDK version is compatible with thread 4448 // states supported by the VM. Return NULL if not compatible. 4449 // 4450 // This function must map the VM java_lang_Thread::ThreadStatus 4451 // to the Java thread state that the JDK supports. 4452 // 4453 4454 typeArrayHandle values_h; 4455 switch (javaThreadState) { 4456 case JAVA_THREAD_STATE_NEW : { 4457 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4458 values_h = typeArrayHandle(THREAD, r); 4459 values_h->int_at_put(0, java_lang_Thread::NEW); 4460 break; 4461 } 4462 case JAVA_THREAD_STATE_RUNNABLE : { 4463 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4464 values_h = typeArrayHandle(THREAD, r); 4465 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4466 break; 4467 } 4468 case JAVA_THREAD_STATE_BLOCKED : { 4469 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4470 values_h = typeArrayHandle(THREAD, r); 4471 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4472 break; 4473 } 4474 case JAVA_THREAD_STATE_WAITING : { 4475 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4476 values_h = typeArrayHandle(THREAD, r); 4477 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4478 values_h->int_at_put(1, java_lang_Thread::PARKED); 4479 break; 4480 } 4481 case JAVA_THREAD_STATE_TIMED_WAITING : { 4482 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4483 values_h = typeArrayHandle(THREAD, r); 4484 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4485 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4486 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4487 break; 4488 } 4489 case JAVA_THREAD_STATE_TERMINATED : { 4490 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4491 values_h = typeArrayHandle(THREAD, r); 4492 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4493 break; 4494 } 4495 default: 4496 // Unknown state - probably incompatible JDK version 4497 return NULL; 4498 } 4499 4500 return (jintArray) JNIHandles::make_local(env, values_h()); 4501 } 4502 JVM_END 4503 4504 4505 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4506 jint javaThreadState, 4507 jintArray values)) 4508 { 4509 // If new thread states are added in future JDK and VM versions, 4510 // this should check if the JDK version is compatible with thread 4511 // states supported by the VM. Return NULL if not compatible. 4512 // 4513 // This function must map the VM java_lang_Thread::ThreadStatus 4514 // to the Java thread state that the JDK supports. 4515 // 4516 4517 ResourceMark rm; 4518 4519 // Check if threads is null 4520 if (values == NULL) { 4521 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4522 } 4523 4524 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4525 typeArrayHandle values_h(THREAD, v); 4526 4527 objArrayHandle names_h; 4528 switch (javaThreadState) { 4529 case JAVA_THREAD_STATE_NEW : { 4530 assert(values_h->length() == 1 && 4531 values_h->int_at(0) == java_lang_Thread::NEW, 4532 "Invalid threadStatus value"); 4533 4534 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4535 1, /* only 1 substate */ 4536 CHECK_NULL); 4537 names_h = objArrayHandle(THREAD, r); 4538 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4539 names_h->obj_at_put(0, name()); 4540 break; 4541 } 4542 case JAVA_THREAD_STATE_RUNNABLE : { 4543 assert(values_h->length() == 1 && 4544 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4545 "Invalid threadStatus value"); 4546 4547 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4548 1, /* only 1 substate */ 4549 CHECK_NULL); 4550 names_h = objArrayHandle(THREAD, r); 4551 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4552 names_h->obj_at_put(0, name()); 4553 break; 4554 } 4555 case JAVA_THREAD_STATE_BLOCKED : { 4556 assert(values_h->length() == 1 && 4557 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4558 "Invalid threadStatus value"); 4559 4560 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4561 1, /* only 1 substate */ 4562 CHECK_NULL); 4563 names_h = objArrayHandle(THREAD, r); 4564 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4565 names_h->obj_at_put(0, name()); 4566 break; 4567 } 4568 case JAVA_THREAD_STATE_WAITING : { 4569 assert(values_h->length() == 2 && 4570 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4571 values_h->int_at(1) == java_lang_Thread::PARKED, 4572 "Invalid threadStatus value"); 4573 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4574 2, /* number of substates */ 4575 CHECK_NULL); 4576 names_h = objArrayHandle(THREAD, r); 4577 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4578 CHECK_NULL); 4579 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4580 CHECK_NULL); 4581 names_h->obj_at_put(0, name0()); 4582 names_h->obj_at_put(1, name1()); 4583 break; 4584 } 4585 case JAVA_THREAD_STATE_TIMED_WAITING : { 4586 assert(values_h->length() == 3 && 4587 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4588 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4589 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4590 "Invalid threadStatus value"); 4591 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4592 3, /* number of substates */ 4593 CHECK_NULL); 4594 names_h = objArrayHandle(THREAD, r); 4595 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4596 CHECK_NULL); 4597 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4598 CHECK_NULL); 4599 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4600 CHECK_NULL); 4601 names_h->obj_at_put(0, name0()); 4602 names_h->obj_at_put(1, name1()); 4603 names_h->obj_at_put(2, name2()); 4604 break; 4605 } 4606 case JAVA_THREAD_STATE_TERMINATED : { 4607 assert(values_h->length() == 1 && 4608 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4609 "Invalid threadStatus value"); 4610 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4611 1, /* only 1 substate */ 4612 CHECK_NULL); 4613 names_h = objArrayHandle(THREAD, r); 4614 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4615 names_h->obj_at_put(0, name()); 4616 break; 4617 } 4618 default: 4619 // Unknown state - probably incompatible JDK version 4620 return NULL; 4621 } 4622 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4623 } 4624 JVM_END 4625 4626 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4627 { 4628 memset(info, 0, sizeof(info_size)); 4629 4630 info->jvm_version = Abstract_VM_Version::jvm_version(); 4631 info->update_version = 0; /* 0 in HotSpot Express VM */ 4632 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4633 4634 // when we add a new capability in the jvm_version_info struct, we should also 4635 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4636 // counter defined in runtimeService.cpp. 4637 info->is_attachable = AttachListener::is_attach_supported(); 4638 } 4639 JVM_END