jvm.cpp revision 6014:8a9bb7821e28
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/classLoader.hpp" 27#include "classfile/javaAssertions.hpp" 28#include "classfile/javaClasses.hpp" 29#include "classfile/symbolTable.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "gc_interface/collectedHeap.inline.hpp" 33#include "interpreter/bytecode.hpp" 34#include "memory/oopFactory.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/fieldStreams.hpp" 37#include "oops/instanceKlass.hpp" 38#include "oops/objArrayKlass.hpp" 39#include "oops/method.hpp" 40#include "prims/jvm.h" 41#include "prims/jvm_misc.hpp" 42#include "prims/jvmtiExport.hpp" 43#include "prims/jvmtiThreadState.hpp" 44#include "prims/nativeLookup.hpp" 45#include "prims/privilegedStack.hpp" 46#include "runtime/arguments.hpp" 47#include "runtime/dtraceJSDT.hpp" 48#include "runtime/handles.inline.hpp" 49#include "runtime/init.hpp" 50#include "runtime/interfaceSupport.hpp" 51#include "runtime/java.hpp" 52#include "runtime/javaCalls.hpp" 53#include "runtime/jfieldIDWorkaround.hpp" 54#include "runtime/os.hpp" 55#include "runtime/perfData.hpp" 56#include "runtime/reflection.hpp" 57#include "runtime/vframe.hpp" 58#include "runtime/vm_operations.hpp" 59#include "services/attachListener.hpp" 60#include "services/management.hpp" 61#include "services/threadService.hpp" 62#include "trace/tracing.hpp" 63#include "utilities/copy.hpp" 64#include "utilities/defaultStream.hpp" 65#include "utilities/dtrace.hpp" 66#include "utilities/events.hpp" 67#include "utilities/histogram.hpp" 68#include "utilities/top.hpp" 69#include "utilities/utf8.hpp" 70#ifdef TARGET_OS_FAMILY_linux 71# include "jvm_linux.h" 72#endif 73#ifdef TARGET_OS_FAMILY_solaris 74# include "jvm_solaris.h" 75#endif 76#ifdef TARGET_OS_FAMILY_windows 77# include "jvm_windows.h" 78#endif 79#ifdef TARGET_OS_FAMILY_aix 80# include "jvm_aix.h" 81#endif 82#ifdef TARGET_OS_FAMILY_bsd 83# include "jvm_bsd.h" 84#endif 85 86#include <errno.h> 87 88#ifndef USDT2 89HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 90HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 91HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 92#endif /* !USDT2 */ 93 94/* 95 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 96 such ctors and calls MUST NOT come between an oop declaration/init and its 97 usage because if objects are move this may cause various memory stomps, bus 98 errors and segfaults. Here is a cookbook for causing so called "naked oop 99 failures": 100 101 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 102 JVMWrapper("JVM_GetClassDeclaredFields"); 103 104 // Object address to be held directly in mirror & not visible to GC 105 oop mirror = JNIHandles::resolve_non_null(ofClass); 106 107 // If this ctor can hit a safepoint, moving objects around, then 108 ComplexConstructor foo; 109 110 // Boom! mirror may point to JUNK instead of the intended object 111 (some dereference of mirror) 112 113 // Here's another call that may block for GC, making mirror stale 114 MutexLocker ml(some_lock); 115 116 // And here's an initializer that can result in a stale oop 117 // all in one step. 118 oop o = call_that_can_throw_exception(TRAPS); 119 120 121 The solution is to keep the oop declaration BELOW the ctor or function 122 call that might cause a GC, do another resolve to reassign the oop, or 123 consider use of a Handle instead of an oop so there is immunity from object 124 motion. But note that the "QUICK" entries below do not have a handlemark 125 and thus can only support use of handles passed in. 126*/ 127 128static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 129 ResourceMark rm; 130 int line_number = -1; 131 const char * source_file = NULL; 132 const char * trace = "explicit"; 133 InstanceKlass* caller = NULL; 134 JavaThread* jthread = JavaThread::current(); 135 if (jthread->has_last_Java_frame()) { 136 vframeStream vfst(jthread); 137 138 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 139 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 140 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 141 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 142 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 143 144 Method* last_caller = NULL; 145 146 while (!vfst.at_end()) { 147 Method* m = vfst.method(); 148 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 149 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 150 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 151 break; 152 } 153 last_caller = m; 154 vfst.next(); 155 } 156 // if this is called from Class.forName0 and that is called from Class.forName, 157 // then print the caller of Class.forName. If this is Class.loadClass, then print 158 // that caller, otherwise keep quiet since this should be picked up elsewhere. 159 bool found_it = false; 160 if (!vfst.at_end() && 161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 162 vfst.method()->name() == vmSymbols::forName0_name()) { 163 vfst.next(); 164 if (!vfst.at_end() && 165 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 166 vfst.method()->name() == vmSymbols::forName_name()) { 167 vfst.next(); 168 found_it = true; 169 } 170 } else if (last_caller != NULL && 171 last_caller->method_holder()->name() == 172 vmSymbols::java_lang_ClassLoader() && 173 (last_caller->name() == vmSymbols::loadClassInternal_name() || 174 last_caller->name() == vmSymbols::loadClass_name())) { 175 found_it = true; 176 } else if (!vfst.at_end()) { 177 if (vfst.method()->is_native()) { 178 // JNI call 179 found_it = true; 180 } 181 } 182 if (found_it && !vfst.at_end()) { 183 // found the caller 184 caller = vfst.method()->method_holder(); 185 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 186 if (line_number == -1) { 187 // show method name if it's a native method 188 trace = vfst.method()->name_and_sig_as_C_string(); 189 } 190 Symbol* s = caller->source_file_name(); 191 if (s != NULL) { 192 source_file = s->as_C_string(); 193 } 194 } 195 } 196 if (caller != NULL) { 197 if (to_class != caller) { 198 const char * from = caller->external_name(); 199 const char * to = to_class->external_name(); 200 // print in a single call to reduce interleaving between threads 201 if (source_file != NULL) { 202 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 203 } else { 204 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 205 } 206 } 207 } 208} 209 210void trace_class_resolution(Klass* to_class) { 211 EXCEPTION_MARK; 212 trace_class_resolution_impl(to_class, THREAD); 213 if (HAS_PENDING_EXCEPTION) { 214 CLEAR_PENDING_EXCEPTION; 215 } 216} 217 218// Wrapper to trace JVM functions 219 220#ifdef ASSERT 221 class JVMTraceWrapper : public StackObj { 222 public: 223 JVMTraceWrapper(const char* format, ...) { 224 if (TraceJVMCalls) { 225 va_list ap; 226 va_start(ap, format); 227 tty->print("JVM "); 228 tty->vprint_cr(format, ap); 229 va_end(ap); 230 } 231 } 232 }; 233 234 Histogram* JVMHistogram; 235 volatile jint JVMHistogram_lock = 0; 236 237 class JVMHistogramElement : public HistogramElement { 238 public: 239 JVMHistogramElement(const char* name); 240 }; 241 242 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 243 _name = elementName; 244 uintx count = 0; 245 246 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 247 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 248 count +=1; 249 if ( (WarnOnStalledSpinLock > 0) 250 && (count % WarnOnStalledSpinLock == 0)) { 251 warning("JVMHistogram_lock seems to be stalled"); 252 } 253 } 254 } 255 256 if(JVMHistogram == NULL) 257 JVMHistogram = new Histogram("JVM Call Counts",100); 258 259 JVMHistogram->add_element(this); 260 Atomic::dec(&JVMHistogram_lock); 261 } 262 263 #define JVMCountWrapper(arg) \ 264 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 265 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 266 267 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 268 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 269 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 270 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 271#else 272 #define JVMWrapper(arg1) 273 #define JVMWrapper2(arg1, arg2) 274 #define JVMWrapper3(arg1, arg2, arg3) 275 #define JVMWrapper4(arg1, arg2, arg3, arg4) 276#endif 277 278 279// Interface version ///////////////////////////////////////////////////////////////////// 280 281 282JVM_LEAF(jint, JVM_GetInterfaceVersion()) 283 return JVM_INTERFACE_VERSION; 284JVM_END 285 286 287// java.lang.System ////////////////////////////////////////////////////////////////////// 288 289 290JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 291 JVMWrapper("JVM_CurrentTimeMillis"); 292 return os::javaTimeMillis(); 293JVM_END 294 295JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 296 JVMWrapper("JVM_NanoTime"); 297 return os::javaTimeNanos(); 298JVM_END 299 300 301JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 302 jobject dst, jint dst_pos, jint length)) 303 JVMWrapper("JVM_ArrayCopy"); 304 // Check if we have null pointers 305 if (src == NULL || dst == NULL) { 306 THROW(vmSymbols::java_lang_NullPointerException()); 307 } 308 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 309 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 310 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 311 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 312 // Do copy 313 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 314JVM_END 315 316 317static void set_property(Handle props, const char* key, const char* value, TRAPS) { 318 JavaValue r(T_OBJECT); 319 // public synchronized Object put(Object key, Object value); 320 HandleMark hm(THREAD); 321 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 322 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 323 JavaCalls::call_virtual(&r, 324 props, 325 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 326 vmSymbols::put_name(), 327 vmSymbols::object_object_object_signature(), 328 key_str, 329 value_str, 330 THREAD); 331} 332 333 334#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 335 336 337JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 338 JVMWrapper("JVM_InitProperties"); 339 ResourceMark rm; 340 341 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 342 343 // System property list includes both user set via -D option and 344 // jvm system specific properties. 345 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 346 PUTPROP(props, p->key(), p->value()); 347 } 348 349 // Convert the -XX:MaxDirectMemorySize= command line flag 350 // to the sun.nio.MaxDirectMemorySize property. 351 // Do this after setting user properties to prevent people 352 // from setting the value with a -D option, as requested. 353 { 354 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 356 } else { 357 char as_chars[256]; 358 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 359 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 360 } 361 } 362 363 // JVM monitoring and management support 364 // Add the sun.management.compiler property for the compiler's name 365 { 366#undef CSIZE 367#if defined(_LP64) || defined(_WIN64) 368 #define CSIZE "64-Bit " 369#else 370 #define CSIZE 371#endif // 64bit 372 373#ifdef TIERED 374 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 375#else 376#if defined(COMPILER1) 377 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 378#elif defined(COMPILER2) 379 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 380#else 381 const char* compiler_name = ""; 382#endif // compilers 383#endif // TIERED 384 385 if (*compiler_name != '\0' && 386 (Arguments::mode() != Arguments::_int)) { 387 PUTPROP(props, "sun.management.compiler", compiler_name); 388 } 389 } 390 391 return properties; 392JVM_END 393 394 395// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 396 397extern volatile jint vm_created; 398 399JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 400 if (vm_created != 0 && (code == 0)) { 401 // The VM is about to exit. We call back into Java to check whether finalizers should be run 402 Universe::run_finalizers_on_exit(); 403 } 404 before_exit(thread); 405 vm_exit(code); 406JVM_END 407 408 409JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 410 before_exit(thread); 411 vm_exit(code); 412JVM_END 413 414 415JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 416 register_on_exit_function(func); 417JVM_END 418 419 420JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 421 JVMWrapper("JVM_GC"); 422 if (!DisableExplicitGC) { 423 Universe::heap()->collect(GCCause::_java_lang_system_gc); 424 } 425JVM_END 426 427 428JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 429 JVMWrapper("JVM_MaxObjectInspectionAge"); 430 return Universe::heap()->millis_since_last_gc(); 431JVM_END 432 433 434JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 435 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 436JVM_END 437 438 439JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 440 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 441JVM_END 442 443static inline jlong convert_size_t_to_jlong(size_t val) { 444 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 445 NOT_LP64 (return (jlong)val;) 446 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 447} 448 449JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 450 JVMWrapper("JVM_TotalMemory"); 451 size_t n = Universe::heap()->capacity(); 452 return convert_size_t_to_jlong(n); 453JVM_END 454 455 456JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 457 JVMWrapper("JVM_FreeMemory"); 458 CollectedHeap* ch = Universe::heap(); 459 size_t n; 460 { 461 MutexLocker x(Heap_lock); 462 n = ch->capacity() - ch->used(); 463 } 464 return convert_size_t_to_jlong(n); 465JVM_END 466 467 468JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 469 JVMWrapper("JVM_MaxMemory"); 470 size_t n = Universe::heap()->max_capacity(); 471 return convert_size_t_to_jlong(n); 472JVM_END 473 474 475JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 476 JVMWrapper("JVM_ActiveProcessorCount"); 477 return os::active_processor_count(); 478JVM_END 479 480 481 482// java.lang.Throwable ////////////////////////////////////////////////////// 483 484 485JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 486 JVMWrapper("JVM_FillInStackTrace"); 487 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 488 java_lang_Throwable::fill_in_stack_trace(exception); 489JVM_END 490 491 492JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 493 JVMWrapper("JVM_GetStackTraceDepth"); 494 oop exception = JNIHandles::resolve(throwable); 495 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 496JVM_END 497 498 499JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 500 JVMWrapper("JVM_GetStackTraceElement"); 501 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 502 oop exception = JNIHandles::resolve(throwable); 503 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 504 return JNIHandles::make_local(env, element); 505JVM_END 506 507 508// java.lang.Object /////////////////////////////////////////////// 509 510 511JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 512 JVMWrapper("JVM_IHashCode"); 513 // as implemented in the classic virtual machine; return 0 if object is NULL 514 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 515JVM_END 516 517 518JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 519 JVMWrapper("JVM_MonitorWait"); 520 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 521 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 522 if (JvmtiExport::should_post_monitor_wait()) { 523 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 524 525 // The current thread already owns the monitor and it has not yet 526 // been added to the wait queue so the current thread cannot be 527 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT 528 // event handler cannot accidentally consume an unpark() meant for 529 // the ParkEvent associated with this ObjectMonitor. 530 } 531 ObjectSynchronizer::wait(obj, ms, CHECK); 532JVM_END 533 534 535JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 536 JVMWrapper("JVM_MonitorNotify"); 537 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 538 ObjectSynchronizer::notify(obj, CHECK); 539JVM_END 540 541 542JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 543 JVMWrapper("JVM_MonitorNotifyAll"); 544 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 545 ObjectSynchronizer::notifyall(obj, CHECK); 546JVM_END 547 548 549JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 550 JVMWrapper("JVM_Clone"); 551 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 552 const KlassHandle klass (THREAD, obj->klass()); 553 JvmtiVMObjectAllocEventCollector oam; 554 555#ifdef ASSERT 556 // Just checking that the cloneable flag is set correct 557 if (obj->is_array()) { 558 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 559 } else { 560 guarantee(obj->is_instance(), "should be instanceOop"); 561 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 562 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 563 } 564#endif 565 566 // Check if class of obj supports the Cloneable interface. 567 // All arrays are considered to be cloneable (See JLS 20.1.5) 568 if (!klass->is_cloneable()) { 569 ResourceMark rm(THREAD); 570 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 571 } 572 573 // Make shallow object copy 574 const int size = obj->size(); 575 oop new_obj = NULL; 576 if (obj->is_array()) { 577 const int length = ((arrayOop)obj())->length(); 578 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 579 } else { 580 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 581 } 582 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 583 // is modifying a reference field in the clonee, a non-oop-atomic copy might 584 // be suspended in the middle of copying the pointer and end up with parts 585 // of two different pointers in the field. Subsequent dereferences will crash. 586 // 4846409: an oop-copy of objects with long or double fields or arrays of same 587 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 588 // of oops. We know objects are aligned on a minimum of an jlong boundary. 589 // The same is true of StubRoutines::object_copy and the various oop_copy 590 // variants, and of the code generated by the inline_native_clone intrinsic. 591 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 592 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 593 (size_t)align_object_size(size) / HeapWordsPerLong); 594 // Clear the header 595 new_obj->init_mark(); 596 597 // Store check (mark entire object and let gc sort it out) 598 BarrierSet* bs = Universe::heap()->barrier_set(); 599 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 600 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 601 602 // Caution: this involves a java upcall, so the clone should be 603 // "gc-robust" by this stage. 604 if (klass->has_finalizer()) { 605 assert(obj->is_instance(), "should be instanceOop"); 606 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 607 } 608 609 return JNIHandles::make_local(env, oop(new_obj)); 610JVM_END 611 612// java.lang.Compiler //////////////////////////////////////////////////// 613 614// The initial cuts of the HotSpot VM will not support JITs, and all existing 615// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 616// functions are all silently ignored unless JVM warnings are printed. 617 618JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 619 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 620JVM_END 621 622 623JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 624 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 625 return JNI_FALSE; 626JVM_END 627 628 629JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 630 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 631 return JNI_FALSE; 632JVM_END 633 634 635JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 636 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 637 return JNI_FALSE; 638JVM_END 639 640 641JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 642 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 643 return NULL; 644JVM_END 645 646 647JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 648 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 649JVM_END 650 651 652JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 653 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 654JVM_END 655 656 657 658// Error message support ////////////////////////////////////////////////////// 659 660JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 661 JVMWrapper("JVM_GetLastErrorString"); 662 return (jint)os::lasterror(buf, len); 663JVM_END 664 665 666// java.io.File /////////////////////////////////////////////////////////////// 667 668JVM_LEAF(char*, JVM_NativePath(char* path)) 669 JVMWrapper2("JVM_NativePath (%s)", path); 670 return os::native_path(path); 671JVM_END 672 673 674// Misc. class handling /////////////////////////////////////////////////////////// 675 676 677JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 678 JVMWrapper("JVM_GetCallerClass"); 679 680 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or 681 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided 682 // temporarily for existing code to use until a replacement API is defined. 683 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { 684 Klass* k = thread->security_get_caller_class(depth); 685 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 686 } 687 688 // Getting the class of the caller frame. 689 // 690 // The call stack at this point looks something like this: 691 // 692 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 693 // [1] [ @CallerSensitive API.method ] 694 // [.] [ (skipped intermediate frames) ] 695 // [n] [ caller ] 696 vframeStream vfst(thread); 697 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 698 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 699 Method* m = vfst.method(); 700 assert(m != NULL, "sanity"); 701 switch (n) { 702 case 0: 703 // This must only be called from Reflection.getCallerClass 704 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 705 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 706 } 707 // fall-through 708 case 1: 709 // Frame 0 and 1 must be caller sensitive. 710 if (!m->caller_sensitive()) { 711 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 712 } 713 break; 714 default: 715 if (!m->is_ignored_by_security_stack_walk()) { 716 // We have reached the desired frame; return the holder class. 717 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 718 } 719 break; 720 } 721 } 722 return NULL; 723JVM_END 724 725 726JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 727 JVMWrapper("JVM_FindPrimitiveClass"); 728 oop mirror = NULL; 729 BasicType t = name2type(utf); 730 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 731 mirror = Universe::java_mirror(t); 732 } 733 if (mirror == NULL) { 734 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 735 } else { 736 return (jclass) JNIHandles::make_local(env, mirror); 737 } 738JVM_END 739 740 741JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 742 JVMWrapper("JVM_ResolveClass"); 743 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 744JVM_END 745 746 747// Returns a class loaded by the bootstrap class loader; or null 748// if not found. ClassNotFoundException is not thrown. 749// 750// Rationale behind JVM_FindClassFromBootLoader 751// a> JVM_FindClassFromClassLoader was never exported in the export tables. 752// b> because of (a) java.dll has a direct dependecy on the unexported 753// private symbol "_JVM_FindClassFromClassLoader@20". 754// c> the launcher cannot use the private symbol as it dynamically opens 755// the entry point, so if something changes, the launcher will fail 756// unexpectedly at runtime, it is safest for the launcher to dlopen a 757// stable exported interface. 758// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 759// signature to change from _JVM_FindClassFromClassLoader@20 to 760// JVM_FindClassFromClassLoader and will not be backward compatible 761// with older JDKs. 762// Thus a public/stable exported entry point is the right solution, 763// public here means public in linker semantics, and is exported only 764// to the JDK, and is not intended to be a public API. 765 766JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 767 const char* name)) 768 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 769 770 // Java libraries should ensure that name is never null... 771 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 772 // It's impossible to create this class; the name cannot fit 773 // into the constant pool. 774 return NULL; 775 } 776 777 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 778 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 779 if (k == NULL) { 780 return NULL; 781 } 782 783 if (TraceClassResolution) { 784 trace_class_resolution(k); 785 } 786 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 787JVM_END 788 789JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 790 jboolean init, jobject loader, 791 jboolean throwError)) 792 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 793 throwError ? "error" : "exception"); 794 // Java libraries should ensure that name is never null... 795 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 796 // It's impossible to create this class; the name cannot fit 797 // into the constant pool. 798 if (throwError) { 799 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 800 } else { 801 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 802 } 803 } 804 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 805 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 806 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 807 Handle(), throwError, THREAD); 808 809 if (TraceClassResolution && result != NULL) { 810 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 811 } 812 return result; 813JVM_END 814 815 816JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 817 jboolean init, jclass from)) 818 JVMWrapper2("JVM_FindClassFromClass %s", name); 819 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 820 // It's impossible to create this class; the name cannot fit 821 // into the constant pool. 822 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 823 } 824 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 825 oop from_class_oop = JNIHandles::resolve(from); 826 Klass* from_class = (from_class_oop == NULL) 827 ? (Klass*)NULL 828 : java_lang_Class::as_Klass(from_class_oop); 829 oop class_loader = NULL; 830 oop protection_domain = NULL; 831 if (from_class != NULL) { 832 class_loader = from_class->class_loader(); 833 protection_domain = from_class->protection_domain(); 834 } 835 Handle h_loader(THREAD, class_loader); 836 Handle h_prot (THREAD, protection_domain); 837 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 838 h_prot, true, thread); 839 840 if (TraceClassResolution && result != NULL) { 841 // this function is generally only used for class loading during verification. 842 ResourceMark rm; 843 oop from_mirror = JNIHandles::resolve_non_null(from); 844 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 845 const char * from_name = from_class->external_name(); 846 847 oop mirror = JNIHandles::resolve_non_null(result); 848 Klass* to_class = java_lang_Class::as_Klass(mirror); 849 const char * to = to_class->external_name(); 850 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 851 } 852 853 return result; 854JVM_END 855 856static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 857 if (loader.is_null()) { 858 return; 859 } 860 861 // check whether the current caller thread holds the lock or not. 862 // If not, increment the corresponding counter 863 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 864 ObjectSynchronizer::owner_self) { 865 counter->inc(); 866 } 867} 868 869// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 870// and JVM_DefineClassWithSourceCond() 871static jclass jvm_define_class_common(JNIEnv *env, const char *name, 872 jobject loader, const jbyte *buf, 873 jsize len, jobject pd, const char *source, 874 jboolean verify, TRAPS) { 875 if (source == NULL) source = "__JVM_DefineClass__"; 876 877 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 878 JavaThread* jt = (JavaThread*) THREAD; 879 880 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 881 ClassLoader::perf_define_appclass_selftime(), 882 ClassLoader::perf_define_appclasses(), 883 jt->get_thread_stat()->perf_recursion_counts_addr(), 884 jt->get_thread_stat()->perf_timers_addr(), 885 PerfClassTraceTime::DEFINE_CLASS); 886 887 if (UsePerfData) { 888 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 889 } 890 891 // Since exceptions can be thrown, class initialization can take place 892 // if name is NULL no check for class name in .class stream has to be made. 893 TempNewSymbol class_name = NULL; 894 if (name != NULL) { 895 const int str_len = (int)strlen(name); 896 if (str_len > Symbol::max_length()) { 897 // It's impossible to create this class; the name cannot fit 898 // into the constant pool. 899 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 900 } 901 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 902 } 903 904 ResourceMark rm(THREAD); 905 ClassFileStream st((u1*) buf, len, (char *)source); 906 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 907 if (UsePerfData) { 908 is_lock_held_by_thread(class_loader, 909 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 910 THREAD); 911 } 912 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 913 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 914 protection_domain, &st, 915 verify != 0, 916 CHECK_NULL); 917 918 if (TraceClassResolution && k != NULL) { 919 trace_class_resolution(k); 920 } 921 922 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 923} 924 925 926JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 927 JVMWrapper2("JVM_DefineClass %s", name); 928 929 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 930JVM_END 931 932 933JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 934 JVMWrapper2("JVM_DefineClassWithSource %s", name); 935 936 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 937JVM_END 938 939JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 940 jobject loader, const jbyte *buf, 941 jsize len, jobject pd, 942 const char *source, jboolean verify)) 943 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 944 945 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 946JVM_END 947 948JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 949 JVMWrapper("JVM_FindLoadedClass"); 950 ResourceMark rm(THREAD); 951 952 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 953 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 954 955 const char* str = java_lang_String::as_utf8_string(string()); 956 // Sanity check, don't expect null 957 if (str == NULL) return NULL; 958 959 const int str_len = (int)strlen(str); 960 if (str_len > Symbol::max_length()) { 961 // It's impossible to create this class; the name cannot fit 962 // into the constant pool. 963 return NULL; 964 } 965 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 966 967 // Security Note: 968 // The Java level wrapper will perform the necessary security check allowing 969 // us to pass the NULL as the initiating class loader. 970 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 971 if (UsePerfData) { 972 is_lock_held_by_thread(h_loader, 973 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 974 THREAD); 975 } 976 977 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 978 h_loader, 979 Handle(), 980 CHECK_NULL); 981 982 return (k == NULL) ? NULL : 983 (jclass) JNIHandles::make_local(env, k->java_mirror()); 984JVM_END 985 986 987// Reflection support ////////////////////////////////////////////////////////////////////////////// 988 989JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 990 assert (cls != NULL, "illegal class"); 991 JVMWrapper("JVM_GetClassName"); 992 JvmtiVMObjectAllocEventCollector oam; 993 ResourceMark rm(THREAD); 994 const char* name; 995 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 996 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 997 } else { 998 // Consider caching interned string in Klass 999 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1000 assert(k->is_klass(), "just checking"); 1001 name = k->external_name(); 1002 } 1003 oop result = StringTable::intern((char*) name, CHECK_NULL); 1004 return (jstring) JNIHandles::make_local(env, result); 1005JVM_END 1006 1007 1008JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1009 JVMWrapper("JVM_GetClassInterfaces"); 1010 JvmtiVMObjectAllocEventCollector oam; 1011 oop mirror = JNIHandles::resolve_non_null(cls); 1012 1013 // Special handling for primitive objects 1014 if (java_lang_Class::is_primitive(mirror)) { 1015 // Primitive objects does not have any interfaces 1016 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1017 return (jobjectArray) JNIHandles::make_local(env, r); 1018 } 1019 1020 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1021 // Figure size of result array 1022 int size; 1023 if (klass->oop_is_instance()) { 1024 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1025 } else { 1026 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1027 size = 2; 1028 } 1029 1030 // Allocate result array 1031 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1032 objArrayHandle result (THREAD, r); 1033 // Fill in result 1034 if (klass->oop_is_instance()) { 1035 // Regular instance klass, fill in all local interfaces 1036 for (int index = 0; index < size; index++) { 1037 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1038 result->obj_at_put(index, k->java_mirror()); 1039 } 1040 } else { 1041 // All arrays implement java.lang.Cloneable and java.io.Serializable 1042 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1043 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1044 } 1045 return (jobjectArray) JNIHandles::make_local(env, result()); 1046JVM_END 1047 1048 1049JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1050 JVMWrapper("JVM_GetClassLoader"); 1051 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1052 return NULL; 1053 } 1054 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1055 oop loader = k->class_loader(); 1056 return JNIHandles::make_local(env, loader); 1057JVM_END 1058 1059 1060JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1061 JVMWrapper("JVM_IsInterface"); 1062 oop mirror = JNIHandles::resolve_non_null(cls); 1063 if (java_lang_Class::is_primitive(mirror)) { 1064 return JNI_FALSE; 1065 } 1066 Klass* k = java_lang_Class::as_Klass(mirror); 1067 jboolean result = k->is_interface(); 1068 assert(!result || k->oop_is_instance(), 1069 "all interfaces are instance types"); 1070 // The compiler intrinsic for isInterface tests the 1071 // Klass::_access_flags bits in the same way. 1072 return result; 1073JVM_END 1074 1075 1076JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1077 JVMWrapper("JVM_GetClassSigners"); 1078 JvmtiVMObjectAllocEventCollector oam; 1079 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1080 // There are no signers for primitive types 1081 return NULL; 1082 } 1083 1084 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1085 1086 // If there are no signers set in the class, or if the class 1087 // is an array, return NULL. 1088 if (signers == NULL) return NULL; 1089 1090 // copy of the signers array 1091 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1092 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1093 for (int index = 0; index < signers->length(); index++) { 1094 signers_copy->obj_at_put(index, signers->obj_at(index)); 1095 } 1096 1097 // return the copy 1098 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1099JVM_END 1100 1101 1102JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1103 JVMWrapper("JVM_SetClassSigners"); 1104 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1105 // This call is ignored for primitive types and arrays. 1106 // Signers are only set once, ClassLoader.java, and thus shouldn't 1107 // be called with an array. Only the bootstrap loader creates arrays. 1108 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1109 if (k->oop_is_instance()) { 1110 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1111 } 1112 } 1113JVM_END 1114 1115 1116JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1117 JVMWrapper("JVM_GetProtectionDomain"); 1118 if (JNIHandles::resolve(cls) == NULL) { 1119 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1120 } 1121 1122 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1123 // Primitive types does not have a protection domain. 1124 return NULL; 1125 } 1126 1127 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1128 return (jobject) JNIHandles::make_local(env, pd); 1129JVM_END 1130 1131 1132static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { 1133 // If there is a security manager and protection domain, check the access 1134 // in the protection domain, otherwise it is authorized. 1135 if (java_lang_System::has_security_manager()) { 1136 1137 // For bootstrapping, if pd implies method isn't in the JDK, allow 1138 // this context to revert to older behavior. 1139 // In this case the isAuthorized field in AccessControlContext is also not 1140 // present. 1141 if (Universe::protection_domain_implies_method() == NULL) { 1142 return true; 1143 } 1144 1145 // Whitelist certain access control contexts 1146 if (java_security_AccessControlContext::is_authorized(context)) { 1147 return true; 1148 } 1149 1150 oop prot = klass->protection_domain(); 1151 if (prot != NULL) { 1152 // Call pd.implies(new SecurityPermission("createAccessControlContext")) 1153 // in the new wrapper. 1154 methodHandle m(THREAD, Universe::protection_domain_implies_method()); 1155 Handle h_prot(THREAD, prot); 1156 JavaValue result(T_BOOLEAN); 1157 JavaCallArguments args(h_prot); 1158 JavaCalls::call(&result, m, &args, CHECK_false); 1159 return (result.get_jboolean() != 0); 1160 } 1161 } 1162 return true; 1163} 1164 1165// Create an AccessControlContext with a protection domain with null codesource 1166// and null permissions - which gives no permissions. 1167oop create_dummy_access_control_context(TRAPS) { 1168 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); 1169 // new ProtectionDomain(null,null); 1170 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); 1171 Handle null_pd(THREAD, null_protection_domain); 1172 1173 // new ProtectionDomain[] {pd}; 1174 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1175 context->obj_at_put(0, null_pd()); 1176 1177 // new AccessControlContext(new ProtectionDomain[] {pd}) 1178 objArrayHandle h_context(THREAD, context); 1179 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1180 return result; 1181} 1182 1183JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1184 JVMWrapper("JVM_DoPrivileged"); 1185 1186 if (action == NULL) { 1187 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1188 } 1189 1190 // Compute the frame initiating the do privileged operation and setup the privileged stack 1191 vframeStream vfst(thread); 1192 vfst.security_get_caller_frame(1); 1193 1194 if (vfst.at_end()) { 1195 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1196 } 1197 1198 Method* method = vfst.method(); 1199 instanceKlassHandle klass (THREAD, method->method_holder()); 1200 1201 // Check that action object understands "Object run()" 1202 Handle h_context; 1203 if (context != NULL) { 1204 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1205 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1206 if (!authorized) { 1207 // Create an unprivileged access control object and call it's run function 1208 // instead. 1209 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1210 h_context = Handle(THREAD, noprivs); 1211 } 1212 } 1213 1214 // Check that action object understands "Object run()" 1215 Handle object (THREAD, JNIHandles::resolve(action)); 1216 1217 // get run() method 1218 Method* m_oop = object->klass()->uncached_lookup_method( 1219 vmSymbols::run_method_name(), 1220 vmSymbols::void_object_signature()); 1221 methodHandle m (THREAD, m_oop); 1222 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1223 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1224 } 1225 1226 // Stack allocated list of privileged stack elements 1227 PrivilegedElement pi; 1228 if (!vfst.at_end()) { 1229 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1230 thread->set_privileged_stack_top(&pi); 1231 } 1232 1233 1234 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1235 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1236 Handle pending_exception; 1237 JavaValue result(T_OBJECT); 1238 JavaCallArguments args(object); 1239 JavaCalls::call(&result, m, &args, THREAD); 1240 1241 // done with action, remove ourselves from the list 1242 if (!vfst.at_end()) { 1243 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1244 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1245 } 1246 1247 if (HAS_PENDING_EXCEPTION) { 1248 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1249 CLEAR_PENDING_EXCEPTION; 1250 1251 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1252 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1253 // Throw a java.security.PrivilegedActionException(Exception e) exception 1254 JavaCallArguments args(pending_exception); 1255 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1256 vmSymbols::exception_void_signature(), 1257 &args); 1258 } 1259 } 1260 1261 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1262 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1263JVM_END 1264 1265 1266// Returns the inherited_access_control_context field of the running thread. 1267JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1268 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1269 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1270 return JNIHandles::make_local(env, result); 1271JVM_END 1272 1273class RegisterArrayForGC { 1274 private: 1275 JavaThread *_thread; 1276 public: 1277 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1278 _thread = thread; 1279 _thread->register_array_for_gc(array); 1280 } 1281 1282 ~RegisterArrayForGC() { 1283 _thread->register_array_for_gc(NULL); 1284 } 1285}; 1286 1287 1288JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1289 JVMWrapper("JVM_GetStackAccessControlContext"); 1290 if (!UsePrivilegedStack) return NULL; 1291 1292 ResourceMark rm(THREAD); 1293 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1294 JvmtiVMObjectAllocEventCollector oam; 1295 1296 // count the protection domains on the execution stack. We collapse 1297 // duplicate consecutive protection domains into a single one, as 1298 // well as stopping when we hit a privileged frame. 1299 1300 // Use vframeStream to iterate through Java frames 1301 vframeStream vfst(thread); 1302 1303 oop previous_protection_domain = NULL; 1304 Handle privileged_context(thread, NULL); 1305 bool is_privileged = false; 1306 oop protection_domain = NULL; 1307 1308 for(; !vfst.at_end(); vfst.next()) { 1309 // get method of frame 1310 Method* method = vfst.method(); 1311 intptr_t* frame_id = vfst.frame_id(); 1312 1313 // check the privileged frames to see if we have a match 1314 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1315 // this frame is privileged 1316 is_privileged = true; 1317 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1318 protection_domain = thread->privileged_stack_top()->protection_domain(); 1319 } else { 1320 protection_domain = method->method_holder()->protection_domain(); 1321 } 1322 1323 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1324 local_array->push(protection_domain); 1325 previous_protection_domain = protection_domain; 1326 } 1327 1328 if (is_privileged) break; 1329 } 1330 1331 1332 // either all the domains on the stack were system domains, or 1333 // we had a privileged system domain 1334 if (local_array->is_empty()) { 1335 if (is_privileged && privileged_context.is_null()) return NULL; 1336 1337 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1338 return JNIHandles::make_local(env, result); 1339 } 1340 1341 // the resource area must be registered in case of a gc 1342 RegisterArrayForGC ragc(thread, local_array); 1343 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1344 local_array->length(), CHECK_NULL); 1345 objArrayHandle h_context(thread, context); 1346 for (int index = 0; index < local_array->length(); index++) { 1347 h_context->obj_at_put(index, local_array->at(index)); 1348 } 1349 1350 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1351 1352 return JNIHandles::make_local(env, result); 1353JVM_END 1354 1355 1356JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1357 JVMWrapper("JVM_IsArrayClass"); 1358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1359 return (k != NULL) && k->oop_is_array() ? true : false; 1360JVM_END 1361 1362 1363JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1364 JVMWrapper("JVM_IsPrimitiveClass"); 1365 oop mirror = JNIHandles::resolve_non_null(cls); 1366 return (jboolean) java_lang_Class::is_primitive(mirror); 1367JVM_END 1368 1369 1370JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1371 JVMWrapper("JVM_GetComponentType"); 1372 oop mirror = JNIHandles::resolve_non_null(cls); 1373 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1374 return (jclass) JNIHandles::make_local(env, result); 1375JVM_END 1376 1377 1378JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1379 JVMWrapper("JVM_GetClassModifiers"); 1380 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1381 // Primitive type 1382 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1383 } 1384 1385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1386 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1387 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1388 return k->modifier_flags(); 1389JVM_END 1390 1391 1392// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1393 1394JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1395 JvmtiVMObjectAllocEventCollector oam; 1396 // ofClass is a reference to a java_lang_Class object. The mirror object 1397 // of an InstanceKlass 1398 1399 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1400 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1401 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1402 return (jobjectArray)JNIHandles::make_local(env, result); 1403 } 1404 1405 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1406 InnerClassesIterator iter(k); 1407 1408 if (iter.length() == 0) { 1409 // Neither an inner nor outer class 1410 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1411 return (jobjectArray)JNIHandles::make_local(env, result); 1412 } 1413 1414 // find inner class info 1415 constantPoolHandle cp(thread, k->constants()); 1416 int length = iter.length(); 1417 1418 // Allocate temp. result array 1419 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1420 objArrayHandle result (THREAD, r); 1421 int members = 0; 1422 1423 for (; !iter.done(); iter.next()) { 1424 int ioff = iter.inner_class_info_index(); 1425 int ooff = iter.outer_class_info_index(); 1426 1427 if (ioff != 0 && ooff != 0) { 1428 // Check to see if the name matches the class we're looking for 1429 // before attempting to find the class. 1430 if (cp->klass_name_at_matches(k, ooff)) { 1431 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1432 if (outer_klass == k()) { 1433 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1434 instanceKlassHandle inner_klass (THREAD, ik); 1435 1436 // Throws an exception if outer klass has not declared k as 1437 // an inner klass 1438 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1439 1440 result->obj_at_put(members, inner_klass->java_mirror()); 1441 members++; 1442 } 1443 } 1444 } 1445 } 1446 1447 if (members != length) { 1448 // Return array of right length 1449 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1450 for(int i = 0; i < members; i++) { 1451 res->obj_at_put(i, result->obj_at(i)); 1452 } 1453 return (jobjectArray)JNIHandles::make_local(env, res); 1454 } 1455 1456 return (jobjectArray)JNIHandles::make_local(env, result()); 1457JVM_END 1458 1459 1460JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1461{ 1462 // ofClass is a reference to a java_lang_Class object. 1463 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1464 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1465 return NULL; 1466 } 1467 1468 bool inner_is_member = false; 1469 Klass* outer_klass 1470 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1471 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1472 if (outer_klass == NULL) return NULL; // already a top-level class 1473 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1474 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1475} 1476JVM_END 1477 1478// should be in InstanceKlass.cpp, but is here for historical reasons 1479Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1480 bool* inner_is_member, 1481 TRAPS) { 1482 Thread* thread = THREAD; 1483 InnerClassesIterator iter(k); 1484 if (iter.length() == 0) { 1485 // No inner class info => no declaring class 1486 return NULL; 1487 } 1488 1489 constantPoolHandle i_cp(thread, k->constants()); 1490 1491 bool found = false; 1492 Klass* ok; 1493 instanceKlassHandle outer_klass; 1494 *inner_is_member = false; 1495 1496 // Find inner_klass attribute 1497 for (; !iter.done() && !found; iter.next()) { 1498 int ioff = iter.inner_class_info_index(); 1499 int ooff = iter.outer_class_info_index(); 1500 int noff = iter.inner_name_index(); 1501 if (ioff != 0) { 1502 // Check to see if the name matches the class we're looking for 1503 // before attempting to find the class. 1504 if (i_cp->klass_name_at_matches(k, ioff)) { 1505 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1506 found = (k() == inner_klass); 1507 if (found && ooff != 0) { 1508 ok = i_cp->klass_at(ooff, CHECK_NULL); 1509 outer_klass = instanceKlassHandle(thread, ok); 1510 *inner_is_member = true; 1511 } 1512 } 1513 } 1514 } 1515 1516 if (found && outer_klass.is_null()) { 1517 // It may be anonymous; try for that. 1518 int encl_method_class_idx = k->enclosing_method_class_index(); 1519 if (encl_method_class_idx != 0) { 1520 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1521 outer_klass = instanceKlassHandle(thread, ok); 1522 *inner_is_member = false; 1523 } 1524 } 1525 1526 // If no inner class attribute found for this class. 1527 if (outer_klass.is_null()) return NULL; 1528 1529 // Throws an exception if outer klass has not declared k as an inner klass 1530 // We need evidence that each klass knows about the other, or else 1531 // the system could allow a spoof of an inner class to gain access rights. 1532 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1533 return outer_klass(); 1534} 1535 1536JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1537 assert (cls != NULL, "illegal class"); 1538 JVMWrapper("JVM_GetClassSignature"); 1539 JvmtiVMObjectAllocEventCollector oam; 1540 ResourceMark rm(THREAD); 1541 // Return null for arrays and primatives 1542 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1543 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1544 if (k->oop_is_instance()) { 1545 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1546 if (sym == NULL) return NULL; 1547 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1548 return (jstring) JNIHandles::make_local(env, str()); 1549 } 1550 } 1551 return NULL; 1552JVM_END 1553 1554 1555JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1556 assert (cls != NULL, "illegal class"); 1557 JVMWrapper("JVM_GetClassAnnotations"); 1558 1559 // Return null for arrays and primitives 1560 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1561 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1562 if (k->oop_is_instance()) { 1563 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1564 return (jbyteArray) JNIHandles::make_local(env, a); 1565 } 1566 } 1567 return NULL; 1568JVM_END 1569 1570 1571static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1572 // some of this code was adapted from from jni_FromReflectedField 1573 1574 oop reflected = JNIHandles::resolve_non_null(field); 1575 oop mirror = java_lang_reflect_Field::clazz(reflected); 1576 Klass* k = java_lang_Class::as_Klass(mirror); 1577 int slot = java_lang_reflect_Field::slot(reflected); 1578 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1579 1580 KlassHandle kh(THREAD, k); 1581 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1582 1583 if (modifiers & JVM_ACC_STATIC) { 1584 // for static fields we only look in the current class 1585 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1586 assert(false, "cannot find static field"); 1587 return false; 1588 } 1589 } else { 1590 // for instance fields we start with the current class and work 1591 // our way up through the superclass chain 1592 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1593 assert(false, "cannot find instance field"); 1594 return false; 1595 } 1596 } 1597 return true; 1598} 1599 1600JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1601 // field is a handle to a java.lang.reflect.Field object 1602 assert(field != NULL, "illegal field"); 1603 JVMWrapper("JVM_GetFieldAnnotations"); 1604 1605 fieldDescriptor fd; 1606 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1607 if (!gotFd) { 1608 return NULL; 1609 } 1610 1611 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1612JVM_END 1613 1614 1615static Method* jvm_get_method_common(jobject method) { 1616 // some of this code was adapted from from jni_FromReflectedMethod 1617 1618 oop reflected = JNIHandles::resolve_non_null(method); 1619 oop mirror = NULL; 1620 int slot = 0; 1621 1622 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1623 mirror = java_lang_reflect_Constructor::clazz(reflected); 1624 slot = java_lang_reflect_Constructor::slot(reflected); 1625 } else { 1626 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1627 "wrong type"); 1628 mirror = java_lang_reflect_Method::clazz(reflected); 1629 slot = java_lang_reflect_Method::slot(reflected); 1630 } 1631 Klass* k = java_lang_Class::as_Klass(mirror); 1632 1633 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1634 assert(m != NULL, "cannot find method"); 1635 return m; // caller has to deal with NULL in product mode 1636} 1637 1638 1639JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1640 JVMWrapper("JVM_GetMethodAnnotations"); 1641 1642 // method is a handle to a java.lang.reflect.Method object 1643 Method* m = jvm_get_method_common(method); 1644 if (m == NULL) { 1645 return NULL; 1646 } 1647 1648 return (jbyteArray) JNIHandles::make_local(env, 1649 Annotations::make_java_array(m->annotations(), THREAD)); 1650JVM_END 1651 1652 1653JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1654 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1655 1656 // method is a handle to a java.lang.reflect.Method object 1657 Method* m = jvm_get_method_common(method); 1658 if (m == NULL) { 1659 return NULL; 1660 } 1661 1662 return (jbyteArray) JNIHandles::make_local(env, 1663 Annotations::make_java_array(m->annotation_default(), THREAD)); 1664JVM_END 1665 1666 1667JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1668 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1669 1670 // method is a handle to a java.lang.reflect.Method object 1671 Method* m = jvm_get_method_common(method); 1672 if (m == NULL) { 1673 return NULL; 1674 } 1675 1676 return (jbyteArray) JNIHandles::make_local(env, 1677 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1678JVM_END 1679 1680/* Type use annotations support (JDK 1.8) */ 1681 1682JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1683 assert (cls != NULL, "illegal class"); 1684 JVMWrapper("JVM_GetClassTypeAnnotations"); 1685 ResourceMark rm(THREAD); 1686 // Return null for arrays and primitives 1687 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1688 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1689 if (k->oop_is_instance()) { 1690 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1691 if (type_annotations != NULL) { 1692 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1693 return (jbyteArray) JNIHandles::make_local(env, a); 1694 } 1695 } 1696 } 1697 return NULL; 1698JVM_END 1699 1700JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1701 assert (method != NULL, "illegal method"); 1702 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1703 1704 // method is a handle to a java.lang.reflect.Method object 1705 Method* m = jvm_get_method_common(method); 1706 if (m == NULL) { 1707 return NULL; 1708 } 1709 1710 AnnotationArray* type_annotations = m->type_annotations(); 1711 if (type_annotations != NULL) { 1712 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1713 return (jbyteArray) JNIHandles::make_local(env, a); 1714 } 1715 1716 return NULL; 1717JVM_END 1718 1719JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1720 assert (field != NULL, "illegal field"); 1721 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1722 1723 fieldDescriptor fd; 1724 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1725 if (!gotFd) { 1726 return NULL; 1727 } 1728 1729 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1730JVM_END 1731 1732static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1733 if (!cp->is_within_bounds(index)) { 1734 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1735 } 1736} 1737 1738JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1739{ 1740 JVMWrapper("JVM_GetMethodParameters"); 1741 // method is a handle to a java.lang.reflect.Method object 1742 Method* method_ptr = jvm_get_method_common(method); 1743 methodHandle mh (THREAD, method_ptr); 1744 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1745 const int num_params = mh->method_parameters_length(); 1746 1747 if (0 != num_params) { 1748 // make sure all the symbols are properly formatted 1749 for (int i = 0; i < num_params; i++) { 1750 MethodParametersElement* params = mh->method_parameters_start(); 1751 int index = params[i].name_cp_index; 1752 bounds_check(mh->constants(), index, CHECK_NULL); 1753 1754 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1755 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1756 "Wrong type at constant pool index"); 1757 } 1758 1759 } 1760 1761 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1762 objArrayHandle result (THREAD, result_oop); 1763 1764 for (int i = 0; i < num_params; i++) { 1765 MethodParametersElement* params = mh->method_parameters_start(); 1766 // For a 0 index, give a NULL symbol 1767 Symbol* sym = 0 != params[i].name_cp_index ? 1768 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1769 int flags = params[i].flags; 1770 oop param = Reflection::new_parameter(reflected_method, i, sym, 1771 flags, CHECK_NULL); 1772 result->obj_at_put(i, param); 1773 } 1774 return (jobjectArray)JNIHandles::make_local(env, result()); 1775 } else { 1776 return (jobjectArray)NULL; 1777 } 1778} 1779JVM_END 1780 1781// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1782 1783JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1784{ 1785 JVMWrapper("JVM_GetClassDeclaredFields"); 1786 JvmtiVMObjectAllocEventCollector oam; 1787 1788 // Exclude primitive types and array types 1789 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1790 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1791 // Return empty array 1792 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1793 return (jobjectArray) JNIHandles::make_local(env, res); 1794 } 1795 1796 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1797 constantPoolHandle cp(THREAD, k->constants()); 1798 1799 // Ensure class is linked 1800 k->link_class(CHECK_NULL); 1801 1802 // 4496456 We need to filter out java.lang.Throwable.backtrace 1803 bool skip_backtrace = false; 1804 1805 // Allocate result 1806 int num_fields; 1807 1808 if (publicOnly) { 1809 num_fields = 0; 1810 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1811 if (fs.access_flags().is_public()) ++num_fields; 1812 } 1813 } else { 1814 num_fields = k->java_fields_count(); 1815 1816 if (k() == SystemDictionary::Throwable_klass()) { 1817 num_fields--; 1818 skip_backtrace = true; 1819 } 1820 } 1821 1822 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1823 objArrayHandle result (THREAD, r); 1824 1825 int out_idx = 0; 1826 fieldDescriptor fd; 1827 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1828 if (skip_backtrace) { 1829 // 4496456 skip java.lang.Throwable.backtrace 1830 int offset = fs.offset(); 1831 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1832 } 1833 1834 if (!publicOnly || fs.access_flags().is_public()) { 1835 fd.reinitialize(k(), fs.index()); 1836 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1837 result->obj_at_put(out_idx, field); 1838 ++out_idx; 1839 } 1840 } 1841 assert(out_idx == num_fields, "just checking"); 1842 return (jobjectArray) JNIHandles::make_local(env, result()); 1843} 1844JVM_END 1845 1846static bool select_method(methodHandle method, bool want_constructor) { 1847 if (want_constructor) { 1848 return (method->is_initializer() && !method->is_static()); 1849 } else { 1850 return (!method->is_initializer() && !method->is_overpass()); 1851 } 1852} 1853 1854static jobjectArray get_class_declared_methods_helper( 1855 JNIEnv *env, 1856 jclass ofClass, jboolean publicOnly, 1857 bool want_constructor, 1858 Klass* klass, TRAPS) { 1859 1860 JvmtiVMObjectAllocEventCollector oam; 1861 1862 // Exclude primitive types and array types 1863 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1864 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1865 // Return empty array 1866 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1867 return (jobjectArray) JNIHandles::make_local(env, res); 1868 } 1869 1870 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1871 1872 // Ensure class is linked 1873 k->link_class(CHECK_NULL); 1874 1875 Array<Method*>* methods = k->methods(); 1876 int methods_length = methods->length(); 1877 1878 // Save original method_idnum in case of redefinition, which can change 1879 // the idnum of obsolete methods. The new method will have the same idnum 1880 // but if we refresh the methods array, the counts will be wrong. 1881 ResourceMark rm(THREAD); 1882 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1883 int num_methods = 0; 1884 1885 for (int i = 0; i < methods_length; i++) { 1886 methodHandle method(THREAD, methods->at(i)); 1887 if (select_method(method, want_constructor)) { 1888 if (!publicOnly || method->is_public()) { 1889 idnums->push(method->method_idnum()); 1890 ++num_methods; 1891 } 1892 } 1893 } 1894 1895 // Allocate result 1896 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1897 objArrayHandle result (THREAD, r); 1898 1899 // Now just put the methods that we selected above, but go by their idnum 1900 // in case of redefinition. The methods can be redefined at any safepoint, 1901 // so above when allocating the oop array and below when creating reflect 1902 // objects. 1903 for (int i = 0; i < num_methods; i++) { 1904 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1905 if (method.is_null()) { 1906 // Method may have been deleted and seems this API can handle null 1907 // Otherwise should probably put a method that throws NSME 1908 result->obj_at_put(i, NULL); 1909 } else { 1910 oop m; 1911 if (want_constructor) { 1912 m = Reflection::new_constructor(method, CHECK_NULL); 1913 } else { 1914 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1915 } 1916 result->obj_at_put(i, m); 1917 } 1918 } 1919 1920 return (jobjectArray) JNIHandles::make_local(env, result()); 1921} 1922 1923JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1924{ 1925 JVMWrapper("JVM_GetClassDeclaredMethods"); 1926 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1927 /*want_constructor*/ false, 1928 SystemDictionary::reflect_Method_klass(), THREAD); 1929} 1930JVM_END 1931 1932JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1933{ 1934 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1935 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1936 /*want_constructor*/ true, 1937 SystemDictionary::reflect_Constructor_klass(), THREAD); 1938} 1939JVM_END 1940 1941JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1942{ 1943 JVMWrapper("JVM_GetClassAccessFlags"); 1944 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1945 // Primitive type 1946 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1947 } 1948 1949 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1950 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1951} 1952JVM_END 1953 1954 1955// Constant pool access ////////////////////////////////////////////////////////// 1956 1957JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1958{ 1959 JVMWrapper("JVM_GetClassConstantPool"); 1960 JvmtiVMObjectAllocEventCollector oam; 1961 1962 // Return null for primitives and arrays 1963 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1964 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1965 if (k->oop_is_instance()) { 1966 instanceKlassHandle k_h(THREAD, k); 1967 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1968 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1969 return JNIHandles::make_local(jcp()); 1970 } 1971 } 1972 return NULL; 1973} 1974JVM_END 1975 1976 1977JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1978{ 1979 JVMWrapper("JVM_ConstantPoolGetSize"); 1980 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1981 return cp->length(); 1982} 1983JVM_END 1984 1985 1986JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1987{ 1988 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1989 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1990 bounds_check(cp, index, CHECK_NULL); 1991 constantTag tag = cp->tag_at(index); 1992 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1993 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1994 } 1995 Klass* k = cp->klass_at(index, CHECK_NULL); 1996 return (jclass) JNIHandles::make_local(k->java_mirror()); 1997} 1998JVM_END 1999 2000JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2001{ 2002 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 2003 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2004 bounds_check(cp, index, CHECK_NULL); 2005 constantTag tag = cp->tag_at(index); 2006 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2007 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2008 } 2009 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2010 if (k == NULL) return NULL; 2011 return (jclass) JNIHandles::make_local(k->java_mirror()); 2012} 2013JVM_END 2014 2015static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2016 constantTag tag = cp->tag_at(index); 2017 if (!tag.is_method() && !tag.is_interface_method()) { 2018 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2019 } 2020 int klass_ref = cp->uncached_klass_ref_index_at(index); 2021 Klass* k_o; 2022 if (force_resolution) { 2023 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2024 } else { 2025 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2026 if (k_o == NULL) return NULL; 2027 } 2028 instanceKlassHandle k(THREAD, k_o); 2029 Symbol* name = cp->uncached_name_ref_at(index); 2030 Symbol* sig = cp->uncached_signature_ref_at(index); 2031 methodHandle m (THREAD, k->find_method(name, sig)); 2032 if (m.is_null()) { 2033 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2034 } 2035 oop method; 2036 if (!m->is_initializer() || m->is_static()) { 2037 method = Reflection::new_method(m, true, true, CHECK_NULL); 2038 } else { 2039 method = Reflection::new_constructor(m, CHECK_NULL); 2040 } 2041 return JNIHandles::make_local(method); 2042} 2043 2044JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2045{ 2046 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2047 JvmtiVMObjectAllocEventCollector oam; 2048 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2049 bounds_check(cp, index, CHECK_NULL); 2050 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2051 return res; 2052} 2053JVM_END 2054 2055JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2056{ 2057 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2058 JvmtiVMObjectAllocEventCollector oam; 2059 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2060 bounds_check(cp, index, CHECK_NULL); 2061 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2062 return res; 2063} 2064JVM_END 2065 2066static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2067 constantTag tag = cp->tag_at(index); 2068 if (!tag.is_field()) { 2069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2070 } 2071 int klass_ref = cp->uncached_klass_ref_index_at(index); 2072 Klass* k_o; 2073 if (force_resolution) { 2074 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2075 } else { 2076 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2077 if (k_o == NULL) return NULL; 2078 } 2079 instanceKlassHandle k(THREAD, k_o); 2080 Symbol* name = cp->uncached_name_ref_at(index); 2081 Symbol* sig = cp->uncached_signature_ref_at(index); 2082 fieldDescriptor fd; 2083 Klass* target_klass = k->find_field(name, sig, &fd); 2084 if (target_klass == NULL) { 2085 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2086 } 2087 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2088 return JNIHandles::make_local(field); 2089} 2090 2091JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2092{ 2093 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2094 JvmtiVMObjectAllocEventCollector oam; 2095 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2096 bounds_check(cp, index, CHECK_NULL); 2097 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2098 return res; 2099} 2100JVM_END 2101 2102JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2103{ 2104 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2105 JvmtiVMObjectAllocEventCollector oam; 2106 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2107 bounds_check(cp, index, CHECK_NULL); 2108 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2109 return res; 2110} 2111JVM_END 2112 2113JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2114{ 2115 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2116 JvmtiVMObjectAllocEventCollector oam; 2117 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2118 bounds_check(cp, index, CHECK_NULL); 2119 constantTag tag = cp->tag_at(index); 2120 if (!tag.is_field_or_method()) { 2121 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2122 } 2123 int klass_ref = cp->uncached_klass_ref_index_at(index); 2124 Symbol* klass_name = cp->klass_name_at(klass_ref); 2125 Symbol* member_name = cp->uncached_name_ref_at(index); 2126 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2127 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2128 objArrayHandle dest(THREAD, dest_o); 2129 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2130 dest->obj_at_put(0, str()); 2131 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2132 dest->obj_at_put(1, str()); 2133 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2134 dest->obj_at_put(2, str()); 2135 return (jobjectArray) JNIHandles::make_local(dest()); 2136} 2137JVM_END 2138 2139JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2140{ 2141 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2142 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2143 bounds_check(cp, index, CHECK_0); 2144 constantTag tag = cp->tag_at(index); 2145 if (!tag.is_int()) { 2146 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2147 } 2148 return cp->int_at(index); 2149} 2150JVM_END 2151 2152JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2153{ 2154 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2155 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2156 bounds_check(cp, index, CHECK_(0L)); 2157 constantTag tag = cp->tag_at(index); 2158 if (!tag.is_long()) { 2159 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2160 } 2161 return cp->long_at(index); 2162} 2163JVM_END 2164 2165JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2166{ 2167 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2168 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2169 bounds_check(cp, index, CHECK_(0.0f)); 2170 constantTag tag = cp->tag_at(index); 2171 if (!tag.is_float()) { 2172 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2173 } 2174 return cp->float_at(index); 2175} 2176JVM_END 2177 2178JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2179{ 2180 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2181 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2182 bounds_check(cp, index, CHECK_(0.0)); 2183 constantTag tag = cp->tag_at(index); 2184 if (!tag.is_double()) { 2185 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2186 } 2187 return cp->double_at(index); 2188} 2189JVM_END 2190 2191JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2192{ 2193 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2194 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2195 bounds_check(cp, index, CHECK_NULL); 2196 constantTag tag = cp->tag_at(index); 2197 if (!tag.is_string()) { 2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2199 } 2200 oop str = cp->string_at(index, CHECK_NULL); 2201 return (jstring) JNIHandles::make_local(str); 2202} 2203JVM_END 2204 2205JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2206{ 2207 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2208 JvmtiVMObjectAllocEventCollector oam; 2209 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2210 bounds_check(cp, index, CHECK_NULL); 2211 constantTag tag = cp->tag_at(index); 2212 if (!tag.is_symbol()) { 2213 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2214 } 2215 Symbol* sym = cp->symbol_at(index); 2216 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2217 return (jstring) JNIHandles::make_local(str()); 2218} 2219JVM_END 2220 2221 2222// Assertion support. ////////////////////////////////////////////////////////// 2223 2224JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2225 JVMWrapper("JVM_DesiredAssertionStatus"); 2226 assert(cls != NULL, "bad class"); 2227 2228 oop r = JNIHandles::resolve(cls); 2229 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2230 if (java_lang_Class::is_primitive(r)) return false; 2231 2232 Klass* k = java_lang_Class::as_Klass(r); 2233 assert(k->oop_is_instance(), "must be an instance klass"); 2234 if (! k->oop_is_instance()) return false; 2235 2236 ResourceMark rm(THREAD); 2237 const char* name = k->name()->as_C_string(); 2238 bool system_class = k->class_loader() == NULL; 2239 return JavaAssertions::enabled(name, system_class); 2240 2241JVM_END 2242 2243 2244// Return a new AssertionStatusDirectives object with the fields filled in with 2245// command-line assertion arguments (i.e., -ea, -da). 2246JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2247 JVMWrapper("JVM_AssertionStatusDirectives"); 2248 JvmtiVMObjectAllocEventCollector oam; 2249 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2250 return JNIHandles::make_local(env, asd); 2251JVM_END 2252 2253// Verification //////////////////////////////////////////////////////////////////////////////// 2254 2255// Reflection for the verifier ///////////////////////////////////////////////////////////////// 2256 2257// RedefineClasses support: bug 6214132 caused verification to fail. 2258// All functions from this section should call the jvmtiThreadSate function: 2259// Klass* class_to_verify_considering_redefinition(Klass* klass). 2260// The function returns a Klass* of the _scratch_class if the verifier 2261// was invoked in the middle of the class redefinition. 2262// Otherwise it returns its argument value which is the _the_class Klass*. 2263// Please, refer to the description in the jvmtiThreadSate.hpp. 2264 2265JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2266 JVMWrapper("JVM_GetClassNameUTF"); 2267 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2268 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2269 return k->name()->as_utf8(); 2270JVM_END 2271 2272 2273JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2274 JVMWrapper("JVM_GetClassCPTypes"); 2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2276 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2277 // types will have length zero if this is not an InstanceKlass 2278 // (length is determined by call to JVM_GetClassCPEntriesCount) 2279 if (k->oop_is_instance()) { 2280 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2281 for (int index = cp->length() - 1; index >= 0; index--) { 2282 constantTag tag = cp->tag_at(index); 2283 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2284 } 2285 } 2286JVM_END 2287 2288 2289JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2290 JVMWrapper("JVM_GetClassCPEntriesCount"); 2291 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2293 if (!k->oop_is_instance()) 2294 return 0; 2295 return InstanceKlass::cast(k)->constants()->length(); 2296JVM_END 2297 2298 2299JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2300 JVMWrapper("JVM_GetClassFieldsCount"); 2301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2302 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2303 if (!k->oop_is_instance()) 2304 return 0; 2305 return InstanceKlass::cast(k)->java_fields_count(); 2306JVM_END 2307 2308 2309JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2310 JVMWrapper("JVM_GetClassMethodsCount"); 2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2313 if (!k->oop_is_instance()) 2314 return 0; 2315 return InstanceKlass::cast(k)->methods()->length(); 2316JVM_END 2317 2318 2319// The following methods, used for the verifier, are never called with 2320// array klasses, so a direct cast to InstanceKlass is safe. 2321// Typically, these methods are called in a loop with bounds determined 2322// by the results of JVM_GetClass{Fields,Methods}Count, which return 2323// zero for arrays. 2324JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2325 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2326 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2327 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2328 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2329 int length = method->checked_exceptions_length(); 2330 if (length > 0) { 2331 CheckedExceptionElement* table= method->checked_exceptions_start(); 2332 for (int i = 0; i < length; i++) { 2333 exceptions[i] = table[i].class_cp_index; 2334 } 2335 } 2336JVM_END 2337 2338 2339JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2340 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2341 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2342 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2343 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2344 return method->checked_exceptions_length(); 2345JVM_END 2346 2347 2348JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2349 JVMWrapper("JVM_GetMethodIxByteCode"); 2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2352 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2353 memcpy(code, method->code_base(), method->code_size()); 2354JVM_END 2355 2356 2357JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2358 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2359 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2361 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2362 return method->code_size(); 2363JVM_END 2364 2365 2366JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2367 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2370 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2371 ExceptionTable extable(method); 2372 entry->start_pc = extable.start_pc(entry_index); 2373 entry->end_pc = extable.end_pc(entry_index); 2374 entry->handler_pc = extable.handler_pc(entry_index); 2375 entry->catchType = extable.catch_type_index(entry_index); 2376JVM_END 2377 2378 2379JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2380 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2381 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2382 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2383 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2384 return method->exception_table_length(); 2385JVM_END 2386 2387 2388JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2389 JVMWrapper("JVM_GetMethodIxModifiers"); 2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2393 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2394JVM_END 2395 2396 2397JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2398 JVMWrapper("JVM_GetFieldIxModifiers"); 2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2401 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2402JVM_END 2403 2404 2405JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2406 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2407 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2408 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2409 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2410 return method->max_locals(); 2411JVM_END 2412 2413 2414JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2415 JVMWrapper("JVM_GetMethodIxArgsSize"); 2416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2417 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2418 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2419 return method->size_of_parameters(); 2420JVM_END 2421 2422 2423JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2424 JVMWrapper("JVM_GetMethodIxMaxStack"); 2425 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2426 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2427 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2428 return method->verifier_max_stack(); 2429JVM_END 2430 2431 2432JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2433 JVMWrapper("JVM_IsConstructorIx"); 2434 ResourceMark rm(THREAD); 2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2438 return method->name() == vmSymbols::object_initializer_name(); 2439JVM_END 2440 2441 2442JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2443 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2444 ResourceMark rm(THREAD); 2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2448 return method->is_overpass(); 2449JVM_END 2450 2451JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2452 JVMWrapper("JVM_GetMethodIxIxUTF"); 2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2456 return method->name()->as_utf8(); 2457JVM_END 2458 2459 2460JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2461 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2462 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2463 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2464 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2465 return method->signature()->as_utf8(); 2466JVM_END 2467 2468/** 2469 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2470 * read entries in the constant pool. Since the old verifier always 2471 * works on a copy of the code, it will not see any rewriting that 2472 * may possibly occur in the middle of verification. So it is important 2473 * that nothing it calls tries to use the cpCache instead of the raw 2474 * constant pool, so we must use cp->uncached_x methods when appropriate. 2475 */ 2476JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2477 JVMWrapper("JVM_GetCPFieldNameUTF"); 2478 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2480 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2481 switch (cp->tag_at(cp_index).value()) { 2482 case JVM_CONSTANT_Fieldref: 2483 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2484 default: 2485 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2486 } 2487 ShouldNotReachHere(); 2488 return NULL; 2489JVM_END 2490 2491 2492JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2493 JVMWrapper("JVM_GetCPMethodNameUTF"); 2494 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2495 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2496 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2497 switch (cp->tag_at(cp_index).value()) { 2498 case JVM_CONSTANT_InterfaceMethodref: 2499 case JVM_CONSTANT_Methodref: 2500 case JVM_CONSTANT_NameAndType: // for invokedynamic 2501 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2502 default: 2503 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2504 } 2505 ShouldNotReachHere(); 2506 return NULL; 2507JVM_END 2508 2509 2510JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2511 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2512 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2513 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2514 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2515 switch (cp->tag_at(cp_index).value()) { 2516 case JVM_CONSTANT_InterfaceMethodref: 2517 case JVM_CONSTANT_Methodref: 2518 case JVM_CONSTANT_NameAndType: // for invokedynamic 2519 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2520 default: 2521 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2522 } 2523 ShouldNotReachHere(); 2524 return NULL; 2525JVM_END 2526 2527 2528JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2529 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2532 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2533 switch (cp->tag_at(cp_index).value()) { 2534 case JVM_CONSTANT_Fieldref: 2535 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2536 default: 2537 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2538 } 2539 ShouldNotReachHere(); 2540 return NULL; 2541JVM_END 2542 2543 2544JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2545 JVMWrapper("JVM_GetCPClassNameUTF"); 2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2548 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2549 Symbol* classname = cp->klass_name_at(cp_index); 2550 return classname->as_utf8(); 2551JVM_END 2552 2553 2554JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2555 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2556 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2557 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2558 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2559 switch (cp->tag_at(cp_index).value()) { 2560 case JVM_CONSTANT_Fieldref: { 2561 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2562 Symbol* classname = cp->klass_name_at(class_index); 2563 return classname->as_utf8(); 2564 } 2565 default: 2566 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2567 } 2568 ShouldNotReachHere(); 2569 return NULL; 2570JVM_END 2571 2572 2573JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2574 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2577 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2578 switch (cp->tag_at(cp_index).value()) { 2579 case JVM_CONSTANT_Methodref: 2580 case JVM_CONSTANT_InterfaceMethodref: { 2581 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2582 Symbol* classname = cp->klass_name_at(class_index); 2583 return classname->as_utf8(); 2584 } 2585 default: 2586 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2587 } 2588 ShouldNotReachHere(); 2589 return NULL; 2590JVM_END 2591 2592 2593JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2594 JVMWrapper("JVM_GetCPFieldModifiers"); 2595 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2596 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2597 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2598 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2599 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2600 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2601 switch (cp->tag_at(cp_index).value()) { 2602 case JVM_CONSTANT_Fieldref: { 2603 Symbol* name = cp->uncached_name_ref_at(cp_index); 2604 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2605 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2606 if (fs.name() == name && fs.signature() == signature) { 2607 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2608 } 2609 } 2610 return -1; 2611 } 2612 default: 2613 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2614 } 2615 ShouldNotReachHere(); 2616 return 0; 2617JVM_END 2618 2619 2620JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2621 JVMWrapper("JVM_GetCPMethodModifiers"); 2622 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2623 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2624 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2625 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2626 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2627 switch (cp->tag_at(cp_index).value()) { 2628 case JVM_CONSTANT_Methodref: 2629 case JVM_CONSTANT_InterfaceMethodref: { 2630 Symbol* name = cp->uncached_name_ref_at(cp_index); 2631 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2632 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2633 int methods_count = methods->length(); 2634 for (int i = 0; i < methods_count; i++) { 2635 Method* method = methods->at(i); 2636 if (method->name() == name && method->signature() == signature) { 2637 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2638 } 2639 } 2640 return -1; 2641 } 2642 default: 2643 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2644 } 2645 ShouldNotReachHere(); 2646 return 0; 2647JVM_END 2648 2649 2650// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2651 2652JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2653 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2654JVM_END 2655 2656 2657JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2658 JVMWrapper("JVM_IsSameClassPackage"); 2659 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2660 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2661 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2662 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2663 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2664JVM_END 2665 2666 2667// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2668 2669JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2670 JVMWrapper2("JVM_Open (%s)", fname); 2671 2672 //%note jvm_r6 2673 int result = os::open(fname, flags, mode); 2674 if (result >= 0) { 2675 return result; 2676 } else { 2677 switch(errno) { 2678 case EEXIST: 2679 return JVM_EEXIST; 2680 default: 2681 return -1; 2682 } 2683 } 2684JVM_END 2685 2686 2687JVM_LEAF(jint, JVM_Close(jint fd)) 2688 JVMWrapper2("JVM_Close (0x%x)", fd); 2689 //%note jvm_r6 2690 return os::close(fd); 2691JVM_END 2692 2693 2694JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2695 JVMWrapper2("JVM_Read (0x%x)", fd); 2696 2697 //%note jvm_r6 2698 return (jint)os::restartable_read(fd, buf, nbytes); 2699JVM_END 2700 2701 2702JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2703 JVMWrapper2("JVM_Write (0x%x)", fd); 2704 2705 //%note jvm_r6 2706 return (jint)os::write(fd, buf, nbytes); 2707JVM_END 2708 2709 2710JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2711 JVMWrapper2("JVM_Available (0x%x)", fd); 2712 //%note jvm_r6 2713 return os::available(fd, pbytes); 2714JVM_END 2715 2716 2717JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2718 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2719 //%note jvm_r6 2720 return os::lseek(fd, offset, whence); 2721JVM_END 2722 2723 2724JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2725 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2726 return os::ftruncate(fd, length); 2727JVM_END 2728 2729 2730JVM_LEAF(jint, JVM_Sync(jint fd)) 2731 JVMWrapper2("JVM_Sync (0x%x)", fd); 2732 //%note jvm_r6 2733 return os::fsync(fd); 2734JVM_END 2735 2736 2737// Printing support ////////////////////////////////////////////////// 2738extern "C" { 2739 2740int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2741 // see bug 4399518, 4417214 2742 if ((intptr_t)count <= 0) return -1; 2743 return vsnprintf(str, count, fmt, args); 2744} 2745 2746 2747int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2748 va_list args; 2749 int len; 2750 va_start(args, fmt); 2751 len = jio_vsnprintf(str, count, fmt, args); 2752 va_end(args); 2753 return len; 2754} 2755 2756 2757int jio_fprintf(FILE* f, const char *fmt, ...) { 2758 int len; 2759 va_list args; 2760 va_start(args, fmt); 2761 len = jio_vfprintf(f, fmt, args); 2762 va_end(args); 2763 return len; 2764} 2765 2766 2767int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2768 if (Arguments::vfprintf_hook() != NULL) { 2769 return Arguments::vfprintf_hook()(f, fmt, args); 2770 } else { 2771 return vfprintf(f, fmt, args); 2772 } 2773} 2774 2775 2776JNIEXPORT int jio_printf(const char *fmt, ...) { 2777 int len; 2778 va_list args; 2779 va_start(args, fmt); 2780 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2781 va_end(args); 2782 return len; 2783} 2784 2785 2786// HotSpot specific jio method 2787void jio_print(const char* s) { 2788 // Try to make this function as atomic as possible. 2789 if (Arguments::vfprintf_hook() != NULL) { 2790 jio_fprintf(defaultStream::output_stream(), "%s", s); 2791 } else { 2792 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2793 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2794 } 2795} 2796 2797} // Extern C 2798 2799// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2800 2801// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2802// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2803// OSThread objects. The exception to this rule is when the target object is the thread 2804// doing the operation, in which case we know that the thread won't exit until the 2805// operation is done (all exits being voluntary). There are a few cases where it is 2806// rather silly to do operations on yourself, like resuming yourself or asking whether 2807// you are alive. While these can still happen, they are not subject to deadlocks if 2808// the lock is held while the operation occurs (this is not the case for suspend, for 2809// instance), and are very unlikely. Because IsAlive needs to be fast and its 2810// implementation is local to this file, we always lock Threads_lock for that one. 2811 2812static void thread_entry(JavaThread* thread, TRAPS) { 2813 HandleMark hm(THREAD); 2814 Handle obj(THREAD, thread->threadObj()); 2815 JavaValue result(T_VOID); 2816 JavaCalls::call_virtual(&result, 2817 obj, 2818 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2819 vmSymbols::run_method_name(), 2820 vmSymbols::void_method_signature(), 2821 THREAD); 2822} 2823 2824 2825JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2826 JVMWrapper("JVM_StartThread"); 2827 JavaThread *native_thread = NULL; 2828 2829 // We cannot hold the Threads_lock when we throw an exception, 2830 // due to rank ordering issues. Example: we might need to grab the 2831 // Heap_lock while we construct the exception. 2832 bool throw_illegal_thread_state = false; 2833 2834 // We must release the Threads_lock before we can post a jvmti event 2835 // in Thread::start. 2836 { 2837 // Ensure that the C++ Thread and OSThread structures aren't freed before 2838 // we operate. 2839 MutexLocker mu(Threads_lock); 2840 2841 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2842 // re-starting an already started thread, so we should usually find 2843 // that the JavaThread is null. However for a JNI attached thread 2844 // there is a small window between the Thread object being created 2845 // (with its JavaThread set) and the update to its threadStatus, so we 2846 // have to check for this 2847 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2848 throw_illegal_thread_state = true; 2849 } else { 2850 // We could also check the stillborn flag to see if this thread was already stopped, but 2851 // for historical reasons we let the thread detect that itself when it starts running 2852 2853 jlong size = 2854 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2855 // Allocate the C++ Thread structure and create the native thread. The 2856 // stack size retrieved from java is signed, but the constructor takes 2857 // size_t (an unsigned type), so avoid passing negative values which would 2858 // result in really large stacks. 2859 size_t sz = size > 0 ? (size_t) size : 0; 2860 native_thread = new JavaThread(&thread_entry, sz); 2861 2862 // At this point it may be possible that no osthread was created for the 2863 // JavaThread due to lack of memory. Check for this situation and throw 2864 // an exception if necessary. Eventually we may want to change this so 2865 // that we only grab the lock if the thread was created successfully - 2866 // then we can also do this check and throw the exception in the 2867 // JavaThread constructor. 2868 if (native_thread->osthread() != NULL) { 2869 // Note: the current thread is not being used within "prepare". 2870 native_thread->prepare(jthread); 2871 } 2872 } 2873 } 2874 2875 if (throw_illegal_thread_state) { 2876 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2877 } 2878 2879 assert(native_thread != NULL, "Starting null thread?"); 2880 2881 if (native_thread->osthread() == NULL) { 2882 // No one should hold a reference to the 'native_thread'. 2883 delete native_thread; 2884 if (JvmtiExport::should_post_resource_exhausted()) { 2885 JvmtiExport::post_resource_exhausted( 2886 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2887 os::native_thread_creation_failed_msg()); 2888 } 2889 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2890 os::native_thread_creation_failed_msg()); 2891 } 2892 2893 Thread::start(native_thread); 2894 2895JVM_END 2896 2897// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2898// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2899// but is thought to be reliable and simple. In the case, where the receiver is the 2900// same thread as the sender, no safepoint is needed. 2901JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2902 JVMWrapper("JVM_StopThread"); 2903 2904 oop java_throwable = JNIHandles::resolve(throwable); 2905 if (java_throwable == NULL) { 2906 THROW(vmSymbols::java_lang_NullPointerException()); 2907 } 2908 oop java_thread = JNIHandles::resolve_non_null(jthread); 2909 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2910 Events::log_exception(JavaThread::current(), 2911 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2912 receiver, (address)java_thread, throwable); 2913 // First check if thread is alive 2914 if (receiver != NULL) { 2915 // Check if exception is getting thrown at self (use oop equality, since the 2916 // target object might exit) 2917 if (java_thread == thread->threadObj()) { 2918 THROW_OOP(java_throwable); 2919 } else { 2920 // Enques a VM_Operation to stop all threads and then deliver the exception... 2921 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2922 } 2923 } 2924 else { 2925 // Either: 2926 // - target thread has not been started before being stopped, or 2927 // - target thread already terminated 2928 // We could read the threadStatus to determine which case it is 2929 // but that is overkill as it doesn't matter. We must set the 2930 // stillborn flag for the first case, and if the thread has already 2931 // exited setting this flag has no affect 2932 java_lang_Thread::set_stillborn(java_thread); 2933 } 2934JVM_END 2935 2936 2937JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2938 JVMWrapper("JVM_IsThreadAlive"); 2939 2940 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2941 return java_lang_Thread::is_alive(thread_oop); 2942JVM_END 2943 2944 2945JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2946 JVMWrapper("JVM_SuspendThread"); 2947 oop java_thread = JNIHandles::resolve_non_null(jthread); 2948 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2949 2950 if (receiver != NULL) { 2951 // thread has run and has not exited (still on threads list) 2952 2953 { 2954 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2955 if (receiver->is_external_suspend()) { 2956 // Don't allow nested external suspend requests. We can't return 2957 // an error from this interface so just ignore the problem. 2958 return; 2959 } 2960 if (receiver->is_exiting()) { // thread is in the process of exiting 2961 return; 2962 } 2963 receiver->set_external_suspend(); 2964 } 2965 2966 // java_suspend() will catch threads in the process of exiting 2967 // and will ignore them. 2968 receiver->java_suspend(); 2969 2970 // It would be nice to have the following assertion in all the 2971 // time, but it is possible for a racing resume request to have 2972 // resumed this thread right after we suspended it. Temporarily 2973 // enable this assertion if you are chasing a different kind of 2974 // bug. 2975 // 2976 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2977 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2978 } 2979JVM_END 2980 2981 2982JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2983 JVMWrapper("JVM_ResumeThread"); 2984 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2985 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2986 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2987 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2988 // looks at it. 2989 MutexLocker ml(Threads_lock); 2990 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2991 if (thr != NULL) { 2992 // the thread has run and is not in the process of exiting 2993 thr->java_resume(); 2994 } 2995JVM_END 2996 2997 2998JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2999 JVMWrapper("JVM_SetThreadPriority"); 3000 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3001 MutexLocker ml(Threads_lock); 3002 oop java_thread = JNIHandles::resolve_non_null(jthread); 3003 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 3004 JavaThread* thr = java_lang_Thread::thread(java_thread); 3005 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 3006 Thread::set_priority(thr, (ThreadPriority)prio); 3007 } 3008JVM_END 3009 3010 3011JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 3012 JVMWrapper("JVM_Yield"); 3013 if (os::dont_yield()) return; 3014#ifndef USDT2 3015 HS_DTRACE_PROBE0(hotspot, thread__yield); 3016#else /* USDT2 */ 3017 HOTSPOT_THREAD_YIELD(); 3018#endif /* USDT2 */ 3019 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3020 // Critical for similar threading behaviour 3021 if (ConvertYieldToSleep) { 3022 os::sleep(thread, MinSleepInterval, false); 3023 } else { 3024 os::yield(); 3025 } 3026JVM_END 3027 3028 3029JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3030 JVMWrapper("JVM_Sleep"); 3031 3032 if (millis < 0) { 3033 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3034 } 3035 3036 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3037 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3038 } 3039 3040 // Save current thread state and restore it at the end of this block. 3041 // And set new thread state to SLEEPING. 3042 JavaThreadSleepState jtss(thread); 3043 3044#ifndef USDT2 3045 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 3046#else /* USDT2 */ 3047 HOTSPOT_THREAD_SLEEP_BEGIN( 3048 millis); 3049#endif /* USDT2 */ 3050 3051 EventThreadSleep event; 3052 3053 if (millis == 0) { 3054 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3055 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3056 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3057 // for SOLARIS 3058 if (ConvertSleepToYield) { 3059 os::yield(); 3060 } else { 3061 ThreadState old_state = thread->osthread()->get_state(); 3062 thread->osthread()->set_state(SLEEPING); 3063 os::sleep(thread, MinSleepInterval, false); 3064 thread->osthread()->set_state(old_state); 3065 } 3066 } else { 3067 ThreadState old_state = thread->osthread()->get_state(); 3068 thread->osthread()->set_state(SLEEPING); 3069 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3070 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3071 // us while we were sleeping. We do not overwrite those. 3072 if (!HAS_PENDING_EXCEPTION) { 3073 if (event.should_commit()) { 3074 event.set_time(millis); 3075 event.commit(); 3076 } 3077#ifndef USDT2 3078 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 3079#else /* USDT2 */ 3080 HOTSPOT_THREAD_SLEEP_END( 3081 1); 3082#endif /* USDT2 */ 3083 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3084 // to properly restore the thread state. That's likely wrong. 3085 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3086 } 3087 } 3088 thread->osthread()->set_state(old_state); 3089 } 3090 if (event.should_commit()) { 3091 event.set_time(millis); 3092 event.commit(); 3093 } 3094#ifndef USDT2 3095 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 3096#else /* USDT2 */ 3097 HOTSPOT_THREAD_SLEEP_END( 3098 0); 3099#endif /* USDT2 */ 3100JVM_END 3101 3102JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3103 JVMWrapper("JVM_CurrentThread"); 3104 oop jthread = thread->threadObj(); 3105 assert (thread != NULL, "no current thread!"); 3106 return JNIHandles::make_local(env, jthread); 3107JVM_END 3108 3109 3110JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3111 JVMWrapper("JVM_CountStackFrames"); 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 bool throw_illegal_thread_state = false; 3116 int count = 0; 3117 3118 { 3119 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3120 // We need to re-resolve the java_thread, since a GC might have happened during the 3121 // acquire of the lock 3122 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3123 3124 if (thr == NULL) { 3125 // do nothing 3126 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3127 // Check whether this java thread has been suspended already. If not, throws 3128 // IllegalThreadStateException. We defer to throw that exception until 3129 // Threads_lock is released since loading exception class has to leave VM. 3130 // The correct way to test a thread is actually suspended is 3131 // wait_for_ext_suspend_completion(), but we can't call that while holding 3132 // the Threads_lock. The above tests are sufficient for our purposes 3133 // provided the walkability of the stack is stable - which it isn't 3134 // 100% but close enough for most practical purposes. 3135 throw_illegal_thread_state = true; 3136 } else { 3137 // Count all java activation, i.e., number of vframes 3138 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3139 // Native frames are not counted 3140 if (!vfst.method()->is_native()) count++; 3141 } 3142 } 3143 } 3144 3145 if (throw_illegal_thread_state) { 3146 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3147 "this thread is not suspended"); 3148 } 3149 return count; 3150JVM_END 3151 3152// Consider: A better way to implement JVM_Interrupt() is to acquire 3153// Threads_lock to resolve the jthread into a Thread pointer, fetch 3154// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3155// drop Threads_lock, and the perform the unpark() and thr_kill() operations 3156// outside the critical section. Threads_lock is hot so we want to minimize 3157// the hold-time. A cleaner interface would be to decompose interrupt into 3158// two steps. The 1st phase, performed under Threads_lock, would return 3159// a closure that'd be invoked after Threads_lock was dropped. 3160// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3161// admit spurious wakeups. 3162 3163JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3164 JVMWrapper("JVM_Interrupt"); 3165 3166 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3167 oop java_thread = JNIHandles::resolve_non_null(jthread); 3168 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3169 // We need to re-resolve the java_thread, since a GC might have happened during the 3170 // acquire of the lock 3171 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3172 if (thr != NULL) { 3173 Thread::interrupt(thr); 3174 } 3175JVM_END 3176 3177 3178JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3179 JVMWrapper("JVM_IsInterrupted"); 3180 3181 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3182 oop java_thread = JNIHandles::resolve_non_null(jthread); 3183 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3184 // We need to re-resolve the java_thread, since a GC might have happened during the 3185 // acquire of the lock 3186 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3187 if (thr == NULL) { 3188 return JNI_FALSE; 3189 } else { 3190 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3191 } 3192JVM_END 3193 3194 3195// Return true iff the current thread has locked the object passed in 3196 3197JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3198 JVMWrapper("JVM_HoldsLock"); 3199 assert(THREAD->is_Java_thread(), "sanity check"); 3200 if (obj == NULL) { 3201 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3202 } 3203 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3204 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3205JVM_END 3206 3207 3208JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3209 JVMWrapper("JVM_DumpAllStacks"); 3210 VM_PrintThreads op; 3211 VMThread::execute(&op); 3212 if (JvmtiExport::should_post_data_dump()) { 3213 JvmtiExport::post_data_dump(); 3214 } 3215JVM_END 3216 3217JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3218 JVMWrapper("JVM_SetNativeThreadName"); 3219 ResourceMark rm(THREAD); 3220 oop java_thread = JNIHandles::resolve_non_null(jthread); 3221 JavaThread* thr = java_lang_Thread::thread(java_thread); 3222 // Thread naming only supported for the current thread, doesn't work for 3223 // target threads. 3224 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3225 // we don't set the name of an attached thread to avoid stepping 3226 // on other programs 3227 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3228 os::set_native_thread_name(thread_name); 3229 } 3230JVM_END 3231 3232// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3233 3234static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3235 assert(jthread->is_Java_thread(), "must be a Java thread"); 3236 if (jthread->privileged_stack_top() == NULL) return false; 3237 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3238 oop loader = jthread->privileged_stack_top()->class_loader(); 3239 if (loader == NULL) return true; 3240 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3241 if (trusted) return true; 3242 } 3243 return false; 3244} 3245 3246JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3247 JVMWrapper("JVM_CurrentLoadedClass"); 3248 ResourceMark rm(THREAD); 3249 3250 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3251 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3252 bool trusted = is_trusted_frame(thread, &vfst); 3253 if (trusted) return NULL; 3254 3255 Method* m = vfst.method(); 3256 if (!m->is_native()) { 3257 InstanceKlass* holder = m->method_holder(); 3258 oop loader = holder->class_loader(); 3259 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3260 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3261 } 3262 } 3263 } 3264 return NULL; 3265JVM_END 3266 3267 3268JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3269 JVMWrapper("JVM_CurrentClassLoader"); 3270 ResourceMark rm(THREAD); 3271 3272 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3273 3274 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3275 bool trusted = is_trusted_frame(thread, &vfst); 3276 if (trusted) return NULL; 3277 3278 Method* m = vfst.method(); 3279 if (!m->is_native()) { 3280 InstanceKlass* holder = m->method_holder(); 3281 assert(holder->is_klass(), "just checking"); 3282 oop loader = holder->class_loader(); 3283 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3284 return JNIHandles::make_local(env, loader); 3285 } 3286 } 3287 } 3288 return NULL; 3289JVM_END 3290 3291 3292JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3293 JVMWrapper("JVM_GetClassContext"); 3294 ResourceMark rm(THREAD); 3295 JvmtiVMObjectAllocEventCollector oam; 3296 vframeStream vfst(thread); 3297 3298 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3299 // This must only be called from SecurityManager.getClassContext 3300 Method* m = vfst.method(); 3301 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3302 m->name() == vmSymbols::getClassContext_name() && 3303 m->signature() == vmSymbols::void_class_array_signature())) { 3304 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3305 } 3306 } 3307 3308 // Collect method holders 3309 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3310 for (; !vfst.at_end(); vfst.security_next()) { 3311 Method* m = vfst.method(); 3312 // Native frames are not returned 3313 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3314 Klass* holder = m->method_holder(); 3315 assert(holder->is_klass(), "just checking"); 3316 klass_array->append(holder); 3317 } 3318 } 3319 3320 // Create result array of type [Ljava/lang/Class; 3321 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3322 // Fill in mirrors corresponding to method holders 3323 for (int i = 0; i < klass_array->length(); i++) { 3324 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3325 } 3326 3327 return (jobjectArray) JNIHandles::make_local(env, result); 3328JVM_END 3329 3330 3331JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3332 JVMWrapper("JVM_ClassDepth"); 3333 ResourceMark rm(THREAD); 3334 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3335 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3336 3337 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3338 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3339 if (class_name_sym == NULL) { 3340 return -1; 3341 } 3342 3343 int depth = 0; 3344 3345 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3346 if (!vfst.method()->is_native()) { 3347 InstanceKlass* holder = vfst.method()->method_holder(); 3348 assert(holder->is_klass(), "just checking"); 3349 if (holder->name() == class_name_sym) { 3350 return depth; 3351 } 3352 depth++; 3353 } 3354 } 3355 return -1; 3356JVM_END 3357 3358 3359JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3360 JVMWrapper("JVM_ClassLoaderDepth"); 3361 ResourceMark rm(THREAD); 3362 int depth = 0; 3363 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3364 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3365 bool trusted = is_trusted_frame(thread, &vfst); 3366 if (trusted) return -1; 3367 3368 Method* m = vfst.method(); 3369 if (!m->is_native()) { 3370 InstanceKlass* holder = m->method_holder(); 3371 assert(holder->is_klass(), "just checking"); 3372 oop loader = holder->class_loader(); 3373 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3374 return depth; 3375 } 3376 depth++; 3377 } 3378 } 3379 return -1; 3380JVM_END 3381 3382 3383// java.lang.Package //////////////////////////////////////////////////////////////// 3384 3385 3386JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3387 JVMWrapper("JVM_GetSystemPackage"); 3388 ResourceMark rm(THREAD); 3389 JvmtiVMObjectAllocEventCollector oam; 3390 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3391 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3392 return (jstring) JNIHandles::make_local(result); 3393JVM_END 3394 3395 3396JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3397 JVMWrapper("JVM_GetSystemPackages"); 3398 JvmtiVMObjectAllocEventCollector oam; 3399 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3400 return (jobjectArray) JNIHandles::make_local(result); 3401JVM_END 3402 3403 3404// ObjectInputStream /////////////////////////////////////////////////////////////// 3405 3406bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3407 if (current_class == NULL) { 3408 return true; 3409 } 3410 if ((current_class == field_class) || access.is_public()) { 3411 return true; 3412 } 3413 3414 if (access.is_protected()) { 3415 // See if current_class is a subclass of field_class 3416 if (current_class->is_subclass_of(field_class)) { 3417 return true; 3418 } 3419 } 3420 3421 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3422} 3423 3424 3425// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3426JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3427 JVMWrapper("JVM_AllocateNewObject"); 3428 JvmtiVMObjectAllocEventCollector oam; 3429 // Receiver is not used 3430 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3431 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3432 3433 // Cannot instantiate primitive types 3434 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3435 ResourceMark rm(THREAD); 3436 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3437 } 3438 3439 // Arrays not allowed here, must use JVM_AllocateNewArray 3440 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3441 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3442 ResourceMark rm(THREAD); 3443 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3444 } 3445 3446 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3447 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3448 3449 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3450 3451 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3452 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3453 3454 // Make sure klass is initialized, since we are about to instantiate one of them. 3455 curr_klass->initialize(CHECK_NULL); 3456 3457 methodHandle m (THREAD, 3458 init_klass->find_method(vmSymbols::object_initializer_name(), 3459 vmSymbols::void_method_signature())); 3460 if (m.is_null()) { 3461 ResourceMark rm(THREAD); 3462 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3463 Method::name_and_sig_as_C_string(init_klass(), 3464 vmSymbols::object_initializer_name(), 3465 vmSymbols::void_method_signature())); 3466 } 3467 3468 if (curr_klass == init_klass && !m->is_public()) { 3469 // Calling the constructor for class 'curr_klass'. 3470 // Only allow calls to a public no-arg constructor. 3471 // This path corresponds to creating an Externalizable object. 3472 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3473 } 3474 3475 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3476 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3477 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3478 } 3479 3480 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3481 // Call constructor m. This might call a constructor higher up in the hierachy 3482 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3483 3484 return JNIHandles::make_local(obj()); 3485JVM_END 3486 3487 3488JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3489 JVMWrapper("JVM_AllocateNewArray"); 3490 JvmtiVMObjectAllocEventCollector oam; 3491 oop mirror = JNIHandles::resolve_non_null(currClass); 3492 3493 if (java_lang_Class::is_primitive(mirror)) { 3494 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3495 } 3496 Klass* k = java_lang_Class::as_Klass(mirror); 3497 oop result; 3498 3499 if (k->oop_is_typeArray()) { 3500 // typeArray 3501 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3502 } else if (k->oop_is_objArray()) { 3503 // objArray 3504 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3505 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3506 result = oak->allocate(length, CHECK_NULL); 3507 } else { 3508 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3509 } 3510 return JNIHandles::make_local(env, result); 3511JVM_END 3512 3513 3514// Return the first non-null class loader up the execution stack, or null 3515// if only code from the null class loader is on the stack. 3516 3517JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3518 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3519 // UseNewReflection 3520 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3521 oop loader = vfst.method()->method_holder()->class_loader(); 3522 if (loader != NULL) { 3523 return JNIHandles::make_local(env, loader); 3524 } 3525 } 3526 return NULL; 3527JVM_END 3528 3529 3530// Load a class relative to the most recent class on the stack with a non-null 3531// classloader. 3532// This function has been deprecated and should not be considered part of the 3533// specified JVM interface. 3534 3535JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3536 jclass currClass, jstring currClassName)) 3537 JVMWrapper("JVM_LoadClass0"); 3538 // Receiver is not used 3539 ResourceMark rm(THREAD); 3540 3541 // Class name argument is not guaranteed to be in internal format 3542 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3543 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3544 3545 const char* str = java_lang_String::as_utf8_string(string()); 3546 3547 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3548 // It's impossible to create this class; the name cannot fit 3549 // into the constant pool. 3550 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3551 } 3552 3553 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3554 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3555 // Find the most recent class on the stack with a non-null classloader 3556 oop loader = NULL; 3557 oop protection_domain = NULL; 3558 if (curr_klass.is_null()) { 3559 for (vframeStream vfst(thread); 3560 !vfst.at_end() && loader == NULL; 3561 vfst.next()) { 3562 if (!vfst.method()->is_native()) { 3563 InstanceKlass* holder = vfst.method()->method_holder(); 3564 loader = holder->class_loader(); 3565 protection_domain = holder->protection_domain(); 3566 } 3567 } 3568 } else { 3569 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3570 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3571 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3572 } 3573 Handle h_loader(THREAD, loader); 3574 Handle h_prot (THREAD, protection_domain); 3575 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3576 false, thread); 3577 if (TraceClassResolution && result != NULL) { 3578 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3579 } 3580 return result; 3581JVM_END 3582 3583 3584// Array /////////////////////////////////////////////////////////////////////////////////////////// 3585 3586 3587// resolve array handle and check arguments 3588static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3589 if (arr == NULL) { 3590 THROW_0(vmSymbols::java_lang_NullPointerException()); 3591 } 3592 oop a = JNIHandles::resolve_non_null(arr); 3593 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3594 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3595 } 3596 return arrayOop(a); 3597} 3598 3599 3600JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3601 JVMWrapper("JVM_GetArrayLength"); 3602 arrayOop a = check_array(env, arr, false, CHECK_0); 3603 return a->length(); 3604JVM_END 3605 3606 3607JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3608 JVMWrapper("JVM_Array_Get"); 3609 JvmtiVMObjectAllocEventCollector oam; 3610 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3611 jvalue value; 3612 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3613 oop box = Reflection::box(&value, type, CHECK_NULL); 3614 return JNIHandles::make_local(env, box); 3615JVM_END 3616 3617 3618JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3619 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3620 jvalue value; 3621 value.i = 0; // to initialize value before getting used in CHECK 3622 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3623 assert(a->is_typeArray(), "just checking"); 3624 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3625 BasicType wide_type = (BasicType) wCode; 3626 if (type != wide_type) { 3627 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3628 } 3629 return value; 3630JVM_END 3631 3632 3633JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3634 JVMWrapper("JVM_SetArrayElement"); 3635 arrayOop a = check_array(env, arr, false, CHECK); 3636 oop box = JNIHandles::resolve(val); 3637 jvalue value; 3638 value.i = 0; // to initialize value before getting used in CHECK 3639 BasicType value_type; 3640 if (a->is_objArray()) { 3641 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3642 value_type = Reflection::unbox_for_regular_object(box, &value); 3643 } else { 3644 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3645 } 3646 Reflection::array_set(&value, a, index, value_type, CHECK); 3647JVM_END 3648 3649 3650JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3651 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3652 arrayOop a = check_array(env, arr, true, CHECK); 3653 assert(a->is_typeArray(), "just checking"); 3654 BasicType value_type = (BasicType) vCode; 3655 Reflection::array_set(&v, a, index, value_type, CHECK); 3656JVM_END 3657 3658 3659JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3660 JVMWrapper("JVM_NewArray"); 3661 JvmtiVMObjectAllocEventCollector oam; 3662 oop element_mirror = JNIHandles::resolve(eltClass); 3663 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3664 return JNIHandles::make_local(env, result); 3665JVM_END 3666 3667 3668JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3669 JVMWrapper("JVM_NewMultiArray"); 3670 JvmtiVMObjectAllocEventCollector oam; 3671 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3672 oop element_mirror = JNIHandles::resolve(eltClass); 3673 assert(dim_array->is_typeArray(), "just checking"); 3674 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3675 return JNIHandles::make_local(env, result); 3676JVM_END 3677 3678 3679// Networking library support //////////////////////////////////////////////////////////////////// 3680 3681JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3682 JVMWrapper("JVM_InitializeSocketLibrary"); 3683 return 0; 3684JVM_END 3685 3686 3687JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3688 JVMWrapper("JVM_Socket"); 3689 return os::socket(domain, type, protocol); 3690JVM_END 3691 3692 3693JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3694 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3695 //%note jvm_r6 3696 return os::socket_close(fd); 3697JVM_END 3698 3699 3700JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3701 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3702 //%note jvm_r6 3703 return os::socket_shutdown(fd, howto); 3704JVM_END 3705 3706 3707JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3708 JVMWrapper2("JVM_Recv (0x%x)", fd); 3709 //%note jvm_r6 3710 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3711JVM_END 3712 3713 3714JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3715 JVMWrapper2("JVM_Send (0x%x)", fd); 3716 //%note jvm_r6 3717 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3718JVM_END 3719 3720 3721JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3722 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3723 //%note jvm_r6 3724 return os::timeout(fd, timeout); 3725JVM_END 3726 3727 3728JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3729 JVMWrapper2("JVM_Listen (0x%x)", fd); 3730 //%note jvm_r6 3731 return os::listen(fd, count); 3732JVM_END 3733 3734 3735JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3736 JVMWrapper2("JVM_Connect (0x%x)", fd); 3737 //%note jvm_r6 3738 return os::connect(fd, him, (socklen_t)len); 3739JVM_END 3740 3741 3742JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3743 JVMWrapper2("JVM_Bind (0x%x)", fd); 3744 //%note jvm_r6 3745 return os::bind(fd, him, (socklen_t)len); 3746JVM_END 3747 3748 3749JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3750 JVMWrapper2("JVM_Accept (0x%x)", fd); 3751 //%note jvm_r6 3752 socklen_t socklen = (socklen_t)(*len); 3753 jint result = os::accept(fd, him, &socklen); 3754 *len = (jint)socklen; 3755 return result; 3756JVM_END 3757 3758 3759JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3760 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3761 //%note jvm_r6 3762 socklen_t socklen = (socklen_t)(*fromlen); 3763 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3764 *fromlen = (int)socklen; 3765 return result; 3766JVM_END 3767 3768 3769JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3770 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3771 //%note jvm_r6 3772 socklen_t socklen = (socklen_t)(*len); 3773 jint result = os::get_sock_name(fd, him, &socklen); 3774 *len = (int)socklen; 3775 return result; 3776JVM_END 3777 3778 3779JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3780 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3781 //%note jvm_r6 3782 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3783JVM_END 3784 3785 3786JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3787 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3788 //%note jvm_r6 3789 return os::socket_available(fd, pbytes); 3790JVM_END 3791 3792 3793JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3794 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3795 //%note jvm_r6 3796 socklen_t socklen = (socklen_t)(*optlen); 3797 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3798 *optlen = (int)socklen; 3799 return result; 3800JVM_END 3801 3802 3803JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3804 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3805 //%note jvm_r6 3806 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3807JVM_END 3808 3809 3810JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3811 JVMWrapper("JVM_GetHostName"); 3812 return os::get_host_name(name, namelen); 3813JVM_END 3814 3815 3816// Library support /////////////////////////////////////////////////////////////////////////// 3817 3818JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3819 //%note jvm_ct 3820 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3821 char ebuf[1024]; 3822 void *load_result; 3823 { 3824 ThreadToNativeFromVM ttnfvm(thread); 3825 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3826 } 3827 if (load_result == NULL) { 3828 char msg[1024]; 3829 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3830 // Since 'ebuf' may contain a string encoded using 3831 // platform encoding scheme, we need to pass 3832 // Exceptions::unsafe_to_utf8 to the new_exception method 3833 // as the last argument. See bug 6367357. 3834 Handle h_exception = 3835 Exceptions::new_exception(thread, 3836 vmSymbols::java_lang_UnsatisfiedLinkError(), 3837 msg, Exceptions::unsafe_to_utf8); 3838 3839 THROW_HANDLE_0(h_exception); 3840 } 3841 return load_result; 3842JVM_END 3843 3844 3845JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3846 JVMWrapper("JVM_UnloadLibrary"); 3847 os::dll_unload(handle); 3848JVM_END 3849 3850 3851JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3852 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3853 return os::dll_lookup(handle, name); 3854JVM_END 3855 3856 3857// Floating point support //////////////////////////////////////////////////////////////////// 3858 3859JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3860 JVMWrapper("JVM_IsNaN"); 3861 return g_isnan(a); 3862JVM_END 3863 3864 3865// JNI version /////////////////////////////////////////////////////////////////////////////// 3866 3867JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3868 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3869 return Threads::is_supported_jni_version_including_1_1(version); 3870JVM_END 3871 3872 3873// String support /////////////////////////////////////////////////////////////////////////// 3874 3875JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3876 JVMWrapper("JVM_InternString"); 3877 JvmtiVMObjectAllocEventCollector oam; 3878 if (str == NULL) return NULL; 3879 oop string = JNIHandles::resolve_non_null(str); 3880 oop result = StringTable::intern(string, CHECK_NULL); 3881 return (jstring) JNIHandles::make_local(env, result); 3882JVM_END 3883 3884 3885// Raw monitor support ////////////////////////////////////////////////////////////////////// 3886 3887// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3888// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3889// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3890// that only works with java threads. 3891 3892 3893JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3894 VM_Exit::block_if_vm_exited(); 3895 JVMWrapper("JVM_RawMonitorCreate"); 3896 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3897} 3898 3899 3900JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3901 VM_Exit::block_if_vm_exited(); 3902 JVMWrapper("JVM_RawMonitorDestroy"); 3903 delete ((Mutex*) mon); 3904} 3905 3906 3907JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3908 VM_Exit::block_if_vm_exited(); 3909 JVMWrapper("JVM_RawMonitorEnter"); 3910 ((Mutex*) mon)->jvm_raw_lock(); 3911 return 0; 3912} 3913 3914 3915JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3916 VM_Exit::block_if_vm_exited(); 3917 JVMWrapper("JVM_RawMonitorExit"); 3918 ((Mutex*) mon)->jvm_raw_unlock(); 3919} 3920 3921 3922// Support for Serialization 3923 3924typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3925typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3926typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3927typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3928 3929static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3930static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3931static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3932static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3933 3934 3935void initialize_converter_functions() { 3936 if (JDK_Version::is_gte_jdk14x_version()) { 3937 // These functions only exist for compatibility with 1.3.1 and earlier 3938 return; 3939 } 3940 3941 // called from universe_post_init() 3942 assert( 3943 int_bits_to_float_fn == NULL && 3944 long_bits_to_double_fn == NULL && 3945 float_to_int_bits_fn == NULL && 3946 double_to_long_bits_fn == NULL , 3947 "initialization done twice" 3948 ); 3949 // initialize 3950 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3951 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3952 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3953 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3954 // verify 3955 assert( 3956 int_bits_to_float_fn != NULL && 3957 long_bits_to_double_fn != NULL && 3958 float_to_int_bits_fn != NULL && 3959 double_to_long_bits_fn != NULL , 3960 "initialization failed" 3961 ); 3962} 3963 3964 3965 3966// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3967 3968jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3969 // Security Note: 3970 // The Java level wrapper will perform the necessary security check allowing 3971 // us to pass the NULL as the initiating class loader. 3972 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3973 3974 KlassHandle klass_handle(THREAD, klass); 3975 // Check if we should initialize the class 3976 if (init && klass_handle->oop_is_instance()) { 3977 klass_handle->initialize(CHECK_NULL); 3978 } 3979 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3980} 3981 3982 3983// Method /////////////////////////////////////////////////////////////////////////////////////////// 3984 3985JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3986 JVMWrapper("JVM_InvokeMethod"); 3987 Handle method_handle; 3988 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3989 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3990 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3991 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3992 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3993 jobject res = JNIHandles::make_local(env, result); 3994 if (JvmtiExport::should_post_vm_object_alloc()) { 3995 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 3996 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 3997 if (java_lang_Class::is_primitive(ret_type)) { 3998 // Only for primitive type vm allocates memory for java object. 3999 // See box() method. 4000 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4001 } 4002 } 4003 return res; 4004 } else { 4005 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4006 } 4007JVM_END 4008 4009 4010JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4011 JVMWrapper("JVM_NewInstanceFromConstructor"); 4012 oop constructor_mirror = JNIHandles::resolve(c); 4013 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4014 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4015 jobject res = JNIHandles::make_local(env, result); 4016 if (JvmtiExport::should_post_vm_object_alloc()) { 4017 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4018 } 4019 return res; 4020JVM_END 4021 4022// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4023 4024JVM_LEAF(jboolean, JVM_SupportsCX8()) 4025 JVMWrapper("JVM_SupportsCX8"); 4026 return VM_Version::supports_cx8(); 4027JVM_END 4028 4029 4030JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4031 JVMWrapper("JVM_CX8Field"); 4032 jlong res; 4033 oop o = JNIHandles::resolve(obj); 4034 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4035 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4036 4037 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4038 res = Atomic::cmpxchg(newVal, addr, oldVal); 4039 4040 return res == oldVal; 4041JVM_END 4042 4043// DTrace /////////////////////////////////////////////////////////////////// 4044 4045JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4046 JVMWrapper("JVM_DTraceGetVersion"); 4047 return (jint)JVM_TRACING_DTRACE_VERSION; 4048JVM_END 4049 4050JVM_ENTRY(jlong,JVM_DTraceActivate( 4051 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4052 JVM_DTraceProvider* providers)) 4053 JVMWrapper("JVM_DTraceActivate"); 4054 return DTraceJSDT::activate( 4055 version, module_name, providers_count, providers, CHECK_0); 4056JVM_END 4057 4058JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4059 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4060 return DTraceJSDT::is_probe_enabled(method); 4061JVM_END 4062 4063JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4064 JVMWrapper("JVM_DTraceDispose"); 4065 DTraceJSDT::dispose(handle); 4066JVM_END 4067 4068JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4069 JVMWrapper("JVM_DTraceIsSupported"); 4070 return DTraceJSDT::is_supported(); 4071JVM_END 4072 4073// Returns an array of all live Thread objects (VM internal JavaThreads, 4074// jvmti agent threads, and JNI attaching threads are skipped) 4075// See CR 6404306 regarding JNI attaching threads 4076JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4077 ResourceMark rm(THREAD); 4078 ThreadsListEnumerator tle(THREAD, false, false); 4079 JvmtiVMObjectAllocEventCollector oam; 4080 4081 int num_threads = tle.num_threads(); 4082 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4083 objArrayHandle threads_ah(THREAD, r); 4084 4085 for (int i = 0; i < num_threads; i++) { 4086 Handle h = tle.get_threadObj(i); 4087 threads_ah->obj_at_put(i, h()); 4088 } 4089 4090 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4091JVM_END 4092 4093 4094// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4095// Return StackTraceElement[][], each element is the stack trace of a thread in 4096// the corresponding entry in the given threads array 4097JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4098 JVMWrapper("JVM_DumpThreads"); 4099 JvmtiVMObjectAllocEventCollector oam; 4100 4101 // Check if threads is null 4102 if (threads == NULL) { 4103 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4104 } 4105 4106 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4107 objArrayHandle ah(THREAD, a); 4108 int num_threads = ah->length(); 4109 // check if threads is non-empty array 4110 if (num_threads == 0) { 4111 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4112 } 4113 4114 // check if threads is not an array of objects of Thread class 4115 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4116 if (k != SystemDictionary::Thread_klass()) { 4117 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4118 } 4119 4120 ResourceMark rm(THREAD); 4121 4122 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4123 for (int i = 0; i < num_threads; i++) { 4124 oop thread_obj = ah->obj_at(i); 4125 instanceHandle h(THREAD, (instanceOop) thread_obj); 4126 thread_handle_array->append(h); 4127 } 4128 4129 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4130 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4131 4132JVM_END 4133 4134// JVM monitoring and management support 4135JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4136 return Management::get_jmm_interface(version); 4137JVM_END 4138 4139// com.sun.tools.attach.VirtualMachine agent properties support 4140// 4141// Initialize the agent properties with the properties maintained in the VM 4142JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4143 JVMWrapper("JVM_InitAgentProperties"); 4144 ResourceMark rm; 4145 4146 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4147 4148 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4149 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4150 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4151 return properties; 4152JVM_END 4153 4154JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4155{ 4156 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4157 JvmtiVMObjectAllocEventCollector oam; 4158 4159 if (ofClass == NULL) { 4160 return NULL; 4161 } 4162 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4163 // Special handling for primitive objects 4164 if (java_lang_Class::is_primitive(mirror())) { 4165 return NULL; 4166 } 4167 Klass* k = java_lang_Class::as_Klass(mirror()); 4168 if (!k->oop_is_instance()) { 4169 return NULL; 4170 } 4171 instanceKlassHandle ik_h(THREAD, k); 4172 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4173 if (encl_method_class_idx == 0) { 4174 return NULL; 4175 } 4176 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4177 objArrayHandle dest(THREAD, dest_o); 4178 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4179 dest->obj_at_put(0, enc_k->java_mirror()); 4180 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4181 if (encl_method_method_idx != 0) { 4182 Symbol* sym = ik_h->constants()->symbol_at( 4183 extract_low_short_from_int( 4184 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4185 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4186 dest->obj_at_put(1, str()); 4187 sym = ik_h->constants()->symbol_at( 4188 extract_high_short_from_int( 4189 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4190 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4191 dest->obj_at_put(2, str()); 4192 } 4193 return (jobjectArray) JNIHandles::make_local(dest()); 4194} 4195JVM_END 4196 4197JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4198 jint javaThreadState)) 4199{ 4200 // If new thread states are added in future JDK and VM versions, 4201 // this should check if the JDK version is compatible with thread 4202 // states supported by the VM. Return NULL if not compatible. 4203 // 4204 // This function must map the VM java_lang_Thread::ThreadStatus 4205 // to the Java thread state that the JDK supports. 4206 // 4207 4208 typeArrayHandle values_h; 4209 switch (javaThreadState) { 4210 case JAVA_THREAD_STATE_NEW : { 4211 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4212 values_h = typeArrayHandle(THREAD, r); 4213 values_h->int_at_put(0, java_lang_Thread::NEW); 4214 break; 4215 } 4216 case JAVA_THREAD_STATE_RUNNABLE : { 4217 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4218 values_h = typeArrayHandle(THREAD, r); 4219 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4220 break; 4221 } 4222 case JAVA_THREAD_STATE_BLOCKED : { 4223 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4224 values_h = typeArrayHandle(THREAD, r); 4225 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4226 break; 4227 } 4228 case JAVA_THREAD_STATE_WAITING : { 4229 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4230 values_h = typeArrayHandle(THREAD, r); 4231 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4232 values_h->int_at_put(1, java_lang_Thread::PARKED); 4233 break; 4234 } 4235 case JAVA_THREAD_STATE_TIMED_WAITING : { 4236 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4237 values_h = typeArrayHandle(THREAD, r); 4238 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4239 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4240 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4241 break; 4242 } 4243 case JAVA_THREAD_STATE_TERMINATED : { 4244 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4245 values_h = typeArrayHandle(THREAD, r); 4246 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4247 break; 4248 } 4249 default: 4250 // Unknown state - probably incompatible JDK version 4251 return NULL; 4252 } 4253 4254 return (jintArray) JNIHandles::make_local(env, values_h()); 4255} 4256JVM_END 4257 4258 4259JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4260 jint javaThreadState, 4261 jintArray values)) 4262{ 4263 // If new thread states are added in future JDK and VM versions, 4264 // this should check if the JDK version is compatible with thread 4265 // states supported by the VM. Return NULL if not compatible. 4266 // 4267 // This function must map the VM java_lang_Thread::ThreadStatus 4268 // to the Java thread state that the JDK supports. 4269 // 4270 4271 ResourceMark rm; 4272 4273 // Check if threads is null 4274 if (values == NULL) { 4275 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4276 } 4277 4278 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4279 typeArrayHandle values_h(THREAD, v); 4280 4281 objArrayHandle names_h; 4282 switch (javaThreadState) { 4283 case JAVA_THREAD_STATE_NEW : { 4284 assert(values_h->length() == 1 && 4285 values_h->int_at(0) == java_lang_Thread::NEW, 4286 "Invalid threadStatus value"); 4287 4288 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4289 1, /* only 1 substate */ 4290 CHECK_NULL); 4291 names_h = objArrayHandle(THREAD, r); 4292 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4293 names_h->obj_at_put(0, name()); 4294 break; 4295 } 4296 case JAVA_THREAD_STATE_RUNNABLE : { 4297 assert(values_h->length() == 1 && 4298 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4299 "Invalid threadStatus value"); 4300 4301 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4302 1, /* only 1 substate */ 4303 CHECK_NULL); 4304 names_h = objArrayHandle(THREAD, r); 4305 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4306 names_h->obj_at_put(0, name()); 4307 break; 4308 } 4309 case JAVA_THREAD_STATE_BLOCKED : { 4310 assert(values_h->length() == 1 && 4311 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4312 "Invalid threadStatus value"); 4313 4314 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4315 1, /* only 1 substate */ 4316 CHECK_NULL); 4317 names_h = objArrayHandle(THREAD, r); 4318 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4319 names_h->obj_at_put(0, name()); 4320 break; 4321 } 4322 case JAVA_THREAD_STATE_WAITING : { 4323 assert(values_h->length() == 2 && 4324 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4325 values_h->int_at(1) == java_lang_Thread::PARKED, 4326 "Invalid threadStatus value"); 4327 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4328 2, /* number of substates */ 4329 CHECK_NULL); 4330 names_h = objArrayHandle(THREAD, r); 4331 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4332 CHECK_NULL); 4333 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4334 CHECK_NULL); 4335 names_h->obj_at_put(0, name0()); 4336 names_h->obj_at_put(1, name1()); 4337 break; 4338 } 4339 case JAVA_THREAD_STATE_TIMED_WAITING : { 4340 assert(values_h->length() == 3 && 4341 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4342 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4343 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4344 "Invalid threadStatus value"); 4345 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4346 3, /* number of substates */ 4347 CHECK_NULL); 4348 names_h = objArrayHandle(THREAD, r); 4349 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4350 CHECK_NULL); 4351 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4352 CHECK_NULL); 4353 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4354 CHECK_NULL); 4355 names_h->obj_at_put(0, name0()); 4356 names_h->obj_at_put(1, name1()); 4357 names_h->obj_at_put(2, name2()); 4358 break; 4359 } 4360 case JAVA_THREAD_STATE_TERMINATED : { 4361 assert(values_h->length() == 1 && 4362 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4363 "Invalid threadStatus value"); 4364 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4365 1, /* only 1 substate */ 4366 CHECK_NULL); 4367 names_h = objArrayHandle(THREAD, r); 4368 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4369 names_h->obj_at_put(0, name()); 4370 break; 4371 } 4372 default: 4373 // Unknown state - probably incompatible JDK version 4374 return NULL; 4375 } 4376 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4377} 4378JVM_END 4379 4380JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4381{ 4382 memset(info, 0, sizeof(info_size)); 4383 4384 info->jvm_version = Abstract_VM_Version::jvm_version(); 4385 info->update_version = 0; /* 0 in HotSpot Express VM */ 4386 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4387 4388 // when we add a new capability in the jvm_version_info struct, we should also 4389 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4390 // counter defined in runtimeService.cpp. 4391 info->is_attachable = AttachListener::is_attach_supported(); 4392} 4393JVM_END 4394