1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/classLoader.hpp"
  27 #include "classfile/javaAssertions.hpp"
  28 #include "classfile/javaClasses.hpp"
  29 #include "classfile/symbolTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "classfile/vmSymbols.hpp"
  32 #include "gc_interface/collectedHeap.inline.hpp"
  33 #include "interpreter/bytecode.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "memory/universe.inline.hpp"
  36 #include "oops/fieldStreams.hpp"
  37 #include "oops/instanceKlass.hpp"
  38 #include "oops/objArrayKlass.hpp"
  39 #include "oops/method.hpp"
  40 #include "prims/jvm.h"
  41 #include "prims/jvm_misc.hpp"
  42 #include "prims/jvmtiExport.hpp"
  43 #include "prims/jvmtiThreadState.hpp"
  44 #include "prims/nativeLookup.hpp"
  45 #include "prims/privilegedStack.hpp"
  46 #include "runtime/arguments.hpp"
  47 #include "runtime/dtraceJSDT.hpp"
  48 #include "runtime/handles.inline.hpp"
  49 #include "runtime/init.hpp"
  50 #include "runtime/interfaceSupport.hpp"
  51 #include "runtime/java.hpp"
  52 #include "runtime/javaCalls.hpp"
  53 #include "runtime/jfieldIDWorkaround.hpp"
  54 #include "runtime/os.hpp"
  55 #include "runtime/perfData.hpp"
  56 #include "runtime/reflection.hpp"
  57 #include "runtime/vframe.hpp"
  58 #include "runtime/vm_operations.hpp"
  59 #include "services/attachListener.hpp"
  60 #include "services/management.hpp"
  61 #include "services/threadService.hpp"
  62 #include "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_bsd
  80 # include "jvm_bsd.h"
  81 #endif
  82 
  83 #include <errno.h>
  84 
  85 #ifndef USDT2
  86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
  87 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
  88 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
  89 #endif /* !USDT2 */
  90 
  91 /*
  92   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
  93   such ctors and calls MUST NOT come between an oop declaration/init and its
  94   usage because if objects are move this may cause various memory stomps, bus
  95   errors and segfaults. Here is a cookbook for causing so called "naked oop
  96   failures":
  97 
  98       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
  99           JVMWrapper("JVM_GetClassDeclaredFields");
 100 
 101           // Object address to be held directly in mirror & not visible to GC
 102           oop mirror = JNIHandles::resolve_non_null(ofClass);
 103 
 104           // If this ctor can hit a safepoint, moving objects around, then
 105           ComplexConstructor foo;
 106 
 107           // Boom! mirror may point to JUNK instead of the intended object
 108           (some dereference of mirror)
 109 
 110           // Here's another call that may block for GC, making mirror stale
 111           MutexLocker ml(some_lock);
 112 
 113           // And here's an initializer that can result in a stale oop
 114           // all in one step.
 115           oop o = call_that_can_throw_exception(TRAPS);
 116 
 117 
 118   The solution is to keep the oop declaration BELOW the ctor or function
 119   call that might cause a GC, do another resolve to reassign the oop, or
 120   consider use of a Handle instead of an oop so there is immunity from object
 121   motion. But note that the "QUICK" entries below do not have a handlemark
 122   and thus can only support use of handles passed in.
 123 */
 124 
 125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
 126   ResourceMark rm;
 127   int line_number = -1;
 128   const char * source_file = NULL;
 129   const char * trace = "explicit";
 130   InstanceKlass* caller = NULL;
 131   JavaThread* jthread = JavaThread::current();
 132   if (jthread->has_last_Java_frame()) {
 133     vframeStream vfst(jthread);
 134 
 135     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
 136     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
 137     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
 138     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
 139     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
 140 
 141     Method* last_caller = NULL;
 142 
 143     while (!vfst.at_end()) {
 144       Method* m = vfst.method();
 145       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
 146           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
 147           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
 148         break;
 149       }
 150       last_caller = m;
 151       vfst.next();
 152     }
 153     // if this is called from Class.forName0 and that is called from Class.forName,
 154     // then print the caller of Class.forName.  If this is Class.loadClass, then print
 155     // that caller, otherwise keep quiet since this should be picked up elsewhere.
 156     bool found_it = false;
 157     if (!vfst.at_end() &&
 158         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 159         vfst.method()->name() == vmSymbols::forName0_name()) {
 160       vfst.next();
 161       if (!vfst.at_end() &&
 162           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
 163           vfst.method()->name() == vmSymbols::forName_name()) {
 164         vfst.next();
 165         found_it = true;
 166       }
 167     } else if (last_caller != NULL &&
 168                last_caller->method_holder()->name() ==
 169                vmSymbols::java_lang_ClassLoader() &&
 170                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
 171                 last_caller->name() == vmSymbols::loadClass_name())) {
 172       found_it = true;
 173     } else if (!vfst.at_end()) {
 174       if (vfst.method()->is_native()) {
 175         // JNI call
 176         found_it = true;
 177       }
 178     }
 179     if (found_it && !vfst.at_end()) {
 180       // found the caller
 181       caller = vfst.method()->method_holder();
 182       line_number = vfst.method()->line_number_from_bci(vfst.bci());
 183       if (line_number == -1) {
 184         // show method name if it's a native method
 185         trace = vfst.method()->name_and_sig_as_C_string();
 186       }
 187       Symbol* s = caller->source_file_name();
 188       if (s != NULL) {
 189         source_file = s->as_C_string();
 190       }
 191     }
 192   }
 193   if (caller != NULL) {
 194     if (to_class != caller) {
 195       const char * from = caller->external_name();
 196       const char * to = to_class->external_name();
 197       // print in a single call to reduce interleaving between threads
 198       if (source_file != NULL) {
 199         tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
 200       } else {
 201         tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
 202       }
 203     }
 204   }
 205 }
 206 
 207 void trace_class_resolution(Klass* to_class) {
 208   EXCEPTION_MARK;
 209   trace_class_resolution_impl(to_class, THREAD);
 210   if (HAS_PENDING_EXCEPTION) {
 211     CLEAR_PENDING_EXCEPTION;
 212   }
 213 }
 214 
 215 // Wrapper to trace JVM functions
 216 
 217 #ifdef ASSERT
 218   class JVMTraceWrapper : public StackObj {
 219    public:
 220     JVMTraceWrapper(const char* format, ...) {
 221       if (TraceJVMCalls) {
 222         va_list ap;
 223         va_start(ap, format);
 224         tty->print("JVM ");
 225         tty->vprint_cr(format, ap);
 226         va_end(ap);
 227       }
 228     }
 229   };
 230 
 231   Histogram* JVMHistogram;
 232   volatile jint JVMHistogram_lock = 0;
 233 
 234   class JVMHistogramElement : public HistogramElement {
 235     public:
 236      JVMHistogramElement(const char* name);
 237   };
 238 
 239   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
 240     _name = elementName;
 241     uintx count = 0;
 242 
 243     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
 244       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
 245         count +=1;
 246         if ( (WarnOnStalledSpinLock > 0)
 247           && (count % WarnOnStalledSpinLock == 0)) {
 248           warning("JVMHistogram_lock seems to be stalled");
 249         }
 250       }
 251      }
 252 
 253     if(JVMHistogram == NULL)
 254       JVMHistogram = new Histogram("JVM Call Counts",100);
 255 
 256     JVMHistogram->add_element(this);
 257     Atomic::dec(&JVMHistogram_lock);
 258   }
 259 
 260   #define JVMCountWrapper(arg) \
 261       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
 262       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
 263 
 264   #define JVMWrapper(arg1)                    JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
 265   #define JVMWrapper2(arg1, arg2)             JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
 266   #define JVMWrapper3(arg1, arg2, arg3)       JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
 267   #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
 268 #else
 269   #define JVMWrapper(arg1)
 270   #define JVMWrapper2(arg1, arg2)
 271   #define JVMWrapper3(arg1, arg2, arg3)
 272   #define JVMWrapper4(arg1, arg2, arg3, arg4)
 273 #endif
 274 
 275 
 276 // Interface version /////////////////////////////////////////////////////////////////////
 277 
 278 
 279 JVM_LEAF(jint, JVM_GetInterfaceVersion())
 280   return JVM_INTERFACE_VERSION;
 281 JVM_END
 282 
 283 
 284 // java.lang.System //////////////////////////////////////////////////////////////////////
 285 
 286 
 287 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
 288   JVMWrapper("JVM_CurrentTimeMillis");
 289   return os::javaTimeMillis();
 290 JVM_END
 291 
 292 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
 293   JVMWrapper("JVM_NanoTime");
 294   return os::javaTimeNanos();
 295 JVM_END
 296 
 297 
 298 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
 299                                jobject dst, jint dst_pos, jint length))
 300   JVMWrapper("JVM_ArrayCopy");
 301   // Check if we have null pointers
 302   if (src == NULL || dst == NULL) {
 303     THROW(vmSymbols::java_lang_NullPointerException());
 304   }
 305   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
 306   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
 307   assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
 308   assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
 309   // Do copy
 310   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 311 JVM_END
 312 
 313 
 314 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
 315   JavaValue r(T_OBJECT);
 316   // public synchronized Object put(Object key, Object value);
 317   HandleMark hm(THREAD);
 318   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
 319   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
 320   JavaCalls::call_virtual(&r,
 321                           props,
 322                           KlassHandle(THREAD, SystemDictionary::Properties_klass()),
 323                           vmSymbols::put_name(),
 324                           vmSymbols::object_object_object_signature(),
 325                           key_str,
 326                           value_str,
 327                           THREAD);
 328 }
 329 
 330 
 331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 332 
 333 
 334 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
 335   JVMWrapper("JVM_InitProperties");
 336   ResourceMark rm;
 337 
 338   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
 339 
 340   // System property list includes both user set via -D option and
 341   // jvm system specific properties.
 342   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
 343     PUTPROP(props, p->key(), p->value());
 344   }
 345 
 346   // Convert the -XX:MaxDirectMemorySize= command line flag
 347   // to the sun.nio.MaxDirectMemorySize property.
 348   // Do this after setting user properties to prevent people
 349   // from setting the value with a -D option, as requested.
 350   {
 351     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
 352       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
 353     } else {
 354       char as_chars[256];
 355       jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
 356       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
 357     }
 358   }
 359 
 360   // JVM monitoring and management support
 361   // Add the sun.management.compiler property for the compiler's name
 362   {
 363 #undef CSIZE
 364 #if defined(_LP64) || defined(_WIN64)
 365   #define CSIZE "64-Bit "
 366 #else
 367   #define CSIZE
 368 #endif // 64bit
 369 
 370 #ifdef TIERED
 371     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 372 #else
 373 #if defined(COMPILER1)
 374     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 375 #elif defined(COMPILER2)
 376     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 377 #else
 378     const char* compiler_name = "";
 379 #endif // compilers
 380 #endif // TIERED
 381 
 382     if (*compiler_name != '\0' &&
 383         (Arguments::mode() != Arguments::_int)) {
 384       PUTPROP(props, "sun.management.compiler", compiler_name);
 385     }
 386   }
 387 
 388   return properties;
 389 JVM_END
 390 
 391 
 392 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 393 
 394 extern volatile jint vm_created;
 395 
 396 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
 397   if (vm_created != 0 && (code == 0)) {
 398     // The VM is about to exit. We call back into Java to check whether finalizers should be run
 399     Universe::run_finalizers_on_exit();
 400   }
 401   before_exit(thread);
 402   vm_exit(code);
 403 JVM_END
 404 
 405 
 406 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
 407   before_exit(thread);
 408   vm_exit(code);
 409 JVM_END
 410 
 411 
 412 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
 413   register_on_exit_function(func);
 414 JVM_END
 415 
 416 
 417 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
 418   JVMWrapper("JVM_GC");
 419   if (!DisableExplicitGC) {
 420     Universe::heap()->collect(GCCause::_java_lang_system_gc);
 421   }
 422 JVM_END
 423 
 424 
 425 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
 426   JVMWrapper("JVM_MaxObjectInspectionAge");
 427   return Universe::heap()->millis_since_last_gc();
 428 JVM_END
 429 
 430 
 431 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
 432   if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
 433 JVM_END
 434 
 435 
 436 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
 437   if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
 438 JVM_END
 439 
 440 static inline jlong convert_size_t_to_jlong(size_t val) {
 441   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
 442   NOT_LP64 (return (jlong)val;)
 443   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 444 }
 445 
 446 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
 447   JVMWrapper("JVM_TotalMemory");
 448   size_t n = Universe::heap()->capacity();
 449   return convert_size_t_to_jlong(n);
 450 JVM_END
 451 
 452 
 453 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
 454   JVMWrapper("JVM_FreeMemory");
 455   CollectedHeap* ch = Universe::heap();
 456   size_t n;
 457   {
 458      MutexLocker x(Heap_lock);
 459      n = ch->capacity() - ch->used();
 460   }
 461   return convert_size_t_to_jlong(n);
 462 JVM_END
 463 
 464 
 465 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
 466   JVMWrapper("JVM_MaxMemory");
 467   size_t n = Universe::heap()->max_capacity();
 468   return convert_size_t_to_jlong(n);
 469 JVM_END
 470 
 471 
 472 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
 473   JVMWrapper("JVM_ActiveProcessorCount");
 474   return os::active_processor_count();
 475 JVM_END
 476 
 477 
 478 
 479 // java.lang.Throwable //////////////////////////////////////////////////////
 480 
 481 
 482 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
 483   JVMWrapper("JVM_FillInStackTrace");
 484   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
 485   java_lang_Throwable::fill_in_stack_trace(exception);
 486 JVM_END
 487 
 488 
 489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
 490   JVMWrapper("JVM_GetStackTraceDepth");
 491   oop exception = JNIHandles::resolve(throwable);
 492   return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
 493 JVM_END
 494 
 495 
 496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
 497   JVMWrapper("JVM_GetStackTraceElement");
 498   JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
 499   oop exception = JNIHandles::resolve(throwable);
 500   oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
 501   return JNIHandles::make_local(env, element);
 502 JVM_END
 503 
 504 
 505 // java.lang.Object ///////////////////////////////////////////////
 506 
 507 
 508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
 509   JVMWrapper("JVM_IHashCode");
 510   // as implemented in the classic virtual machine; return 0 if object is NULL
 511   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 512 JVM_END
 513 
 514 
 515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
 516   JVMWrapper("JVM_MonitorWait");
 517   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 518   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
 519   if (JvmtiExport::should_post_monitor_wait()) {
 520     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
 521   }
 522   ObjectSynchronizer::wait(obj, ms, CHECK);
 523 JVM_END
 524 
 525 
 526 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
 527   JVMWrapper("JVM_MonitorNotify");
 528   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 529   ObjectSynchronizer::notify(obj, CHECK);
 530 JVM_END
 531 
 532 
 533 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
 534   JVMWrapper("JVM_MonitorNotifyAll");
 535   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 536   ObjectSynchronizer::notifyall(obj, CHECK);
 537 JVM_END
 538 
 539 
 540 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
 541   JVMWrapper("JVM_Clone");
 542   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
 543   const KlassHandle klass (THREAD, obj->klass());
 544   JvmtiVMObjectAllocEventCollector oam;
 545 
 546 #ifdef ASSERT
 547   // Just checking that the cloneable flag is set correct
 548   if (obj->is_array()) {
 549     guarantee(klass->is_cloneable(), "all arrays are cloneable");
 550   } else {
 551     guarantee(obj->is_instance(), "should be instanceOop");
 552     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
 553     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
 554   }
 555 #endif
 556 
 557   // Check if class of obj supports the Cloneable interface.
 558   // All arrays are considered to be cloneable (See JLS 20.1.5)
 559   if (!klass->is_cloneable()) {
 560     ResourceMark rm(THREAD);
 561     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
 562   }
 563 
 564   // Make shallow object copy
 565   const int size = obj->size();
 566   oop new_obj = NULL;
 567   if (obj->is_array()) {
 568     const int length = ((arrayOop)obj())->length();
 569     new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
 570   } else {
 571     new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
 572   }
 573   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
 574   // is modifying a reference field in the clonee, a non-oop-atomic copy might
 575   // be suspended in the middle of copying the pointer and end up with parts
 576   // of two different pointers in the field.  Subsequent dereferences will crash.
 577   // 4846409: an oop-copy of objects with long or double fields or arrays of same
 578   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
 579   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
 580   // The same is true of StubRoutines::object_copy and the various oop_copy
 581   // variants, and of the code generated by the inline_native_clone intrinsic.
 582   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
 583   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
 584                                (size_t)align_object_size(size) / HeapWordsPerLong);
 585   // Clear the header
 586   new_obj->init_mark();
 587 
 588   // Store check (mark entire object and let gc sort it out)
 589   BarrierSet* bs = Universe::heap()->barrier_set();
 590   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
 591   bs->write_region(MemRegion((HeapWord*)new_obj, size));
 592 
 593   // Caution: this involves a java upcall, so the clone should be
 594   // "gc-robust" by this stage.
 595   if (klass->has_finalizer()) {
 596     assert(obj->is_instance(), "should be instanceOop");
 597     new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
 598   }
 599 
 600   return JNIHandles::make_local(env, oop(new_obj));
 601 JVM_END
 602 
 603 // java.lang.Compiler ////////////////////////////////////////////////////
 604 
 605 // The initial cuts of the HotSpot VM will not support JITs, and all existing
 606 // JITs would need extensive changes to work with HotSpot.  The JIT-related JVM
 607 // functions are all silently ignored unless JVM warnings are printed.
 608 
 609 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
 610   if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
 611 JVM_END
 612 
 613 
 614 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
 615   if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
 616   return JNI_FALSE;
 617 JVM_END
 618 
 619 
 620 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
 621   if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
 622   return JNI_FALSE;
 623 JVM_END
 624 
 625 
 626 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
 627   if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
 628   return JNI_FALSE;
 629 JVM_END
 630 
 631 
 632 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
 633   if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
 634   return NULL;
 635 JVM_END
 636 
 637 
 638 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
 639   if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
 640 JVM_END
 641 
 642 
 643 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
 644   if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
 645 JVM_END
 646 
 647 
 648 
 649 // Error message support //////////////////////////////////////////////////////
 650 
 651 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
 652   JVMWrapper("JVM_GetLastErrorString");
 653   return (jint)os::lasterror(buf, len);
 654 JVM_END
 655 
 656 
 657 // java.io.File ///////////////////////////////////////////////////////////////
 658 
 659 JVM_LEAF(char*, JVM_NativePath(char* path))
 660   JVMWrapper2("JVM_NativePath (%s)", path);
 661   return os::native_path(path);
 662 JVM_END
 663 
 664 
 665 // Misc. class handling ///////////////////////////////////////////////////////////
 666 
 667 
 668 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
 669   JVMWrapper("JVM_GetCallerClass");
 670 
 671   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
 672   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
 673     Klass* k = thread->security_get_caller_class(depth);
 674     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
 675   } else {
 676     // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
 677     assert(depth == -1, "wrong handshake depth");
 678   }
 679 
 680   // Getting the class of the caller frame.
 681   //
 682   // The call stack at this point looks something like this:
 683   //
 684   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
 685   // [1] [ @CallerSensitive API.method                                   ]
 686   // [.] [ (skipped intermediate frames)                                 ]
 687   // [n] [ caller                                                        ]
 688   vframeStream vfst(thread);
 689   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
 690   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
 691     Method* m = vfst.method();
 692     assert(m != NULL, "sanity");
 693     switch (n) {
 694     case 0:
 695       // This must only be called from Reflection.getCallerClass
 696       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
 697         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
 698       }
 699       // fall-through
 700     case 1:
 701       // Frame 0 and 1 must be caller sensitive.
 702       if (!m->caller_sensitive()) {
 703         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
 704       }
 705       break;
 706     default:
 707       if (!m->is_ignored_by_security_stack_walk()) {
 708         // We have reached the desired frame; return the holder class.
 709         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
 710       }
 711       break;
 712     }
 713   }
 714   return NULL;
 715 JVM_END
 716 
 717 
 718 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
 719   JVMWrapper("JVM_FindPrimitiveClass");
 720   oop mirror = NULL;
 721   BasicType t = name2type(utf);
 722   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
 723     mirror = Universe::java_mirror(t);
 724   }
 725   if (mirror == NULL) {
 726     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
 727   } else {
 728     return (jclass) JNIHandles::make_local(env, mirror);
 729   }
 730 JVM_END
 731 
 732 
 733 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
 734   JVMWrapper("JVM_ResolveClass");
 735   if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
 736 JVM_END
 737 
 738 
 739 // Returns a class loaded by the bootstrap class loader; or null
 740 // if not found.  ClassNotFoundException is not thrown.
 741 //
 742 // Rationale behind JVM_FindClassFromBootLoader
 743 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
 744 // b> because of (a) java.dll has a direct dependecy on the  unexported
 745 //    private symbol "_JVM_FindClassFromClassLoader@20".
 746 // c> the launcher cannot use the private symbol as it dynamically opens
 747 //    the entry point, so if something changes, the launcher will fail
 748 //    unexpectedly at runtime, it is safest for the launcher to dlopen a
 749 //    stable exported interface.
 750 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
 751 //    signature to change from _JVM_FindClassFromClassLoader@20 to
 752 //    JVM_FindClassFromClassLoader and will not be backward compatible
 753 //    with older JDKs.
 754 // Thus a public/stable exported entry point is the right solution,
 755 // public here means public in linker semantics, and is exported only
 756 // to the JDK, and is not intended to be a public API.
 757 
 758 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
 759                                               const char* name))
 760   JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
 761 
 762   // Java libraries should ensure that name is never null...
 763   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 764     // It's impossible to create this class;  the name cannot fit
 765     // into the constant pool.
 766     return NULL;
 767   }
 768 
 769   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 770   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
 771   if (k == NULL) {
 772     return NULL;
 773   }
 774 
 775   if (TraceClassResolution) {
 776     trace_class_resolution(k);
 777   }
 778   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 779 JVM_END
 780 
 781 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
 782                                                jboolean init, jobject loader,
 783                                                jboolean throwError))
 784   JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
 785                throwError ? "error" : "exception");
 786   // Java libraries should ensure that name is never null...
 787   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 788     // It's impossible to create this class;  the name cannot fit
 789     // into the constant pool.
 790     if (throwError) {
 791       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 792     } else {
 793       THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
 794     }
 795   }
 796   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 797   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 798   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 799                                                Handle(), throwError, THREAD);
 800 
 801   if (TraceClassResolution && result != NULL) {
 802     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 803   }
 804   return result;
 805 JVM_END
 806 
 807 
 808 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
 809                                          jboolean init, jclass from))
 810   JVMWrapper2("JVM_FindClassFromClass %s", name);
 811   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 812     // It's impossible to create this class;  the name cannot fit
 813     // into the constant pool.
 814     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 815   }
 816   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
 817   oop from_class_oop = JNIHandles::resolve(from);
 818   Klass* from_class = (from_class_oop == NULL)
 819                            ? (Klass*)NULL
 820                            : java_lang_Class::as_Klass(from_class_oop);
 821   oop class_loader = NULL;
 822   oop protection_domain = NULL;
 823   if (from_class != NULL) {
 824     class_loader = from_class->class_loader();
 825     protection_domain = from_class->protection_domain();
 826   }
 827   Handle h_loader(THREAD, class_loader);
 828   Handle h_prot  (THREAD, protection_domain);
 829   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
 830                                                h_prot, true, thread);
 831 
 832   if (TraceClassResolution && result != NULL) {
 833     // this function is generally only used for class loading during verification.
 834     ResourceMark rm;
 835     oop from_mirror = JNIHandles::resolve_non_null(from);
 836     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
 837     const char * from_name = from_class->external_name();
 838 
 839     oop mirror = JNIHandles::resolve_non_null(result);
 840     Klass* to_class = java_lang_Class::as_Klass(mirror);
 841     const char * to = to_class->external_name();
 842     tty->print("RESOLVE %s %s (verification)\n", from_name, to);
 843   }
 844 
 845   return result;
 846 JVM_END
 847 
 848 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
 849   if (loader.is_null()) {
 850     return;
 851   }
 852 
 853   // check whether the current caller thread holds the lock or not.
 854   // If not, increment the corresponding counter
 855   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
 856       ObjectSynchronizer::owner_self) {
 857     counter->inc();
 858   }
 859 }
 860 
 861 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 862 // and JVM_DefineClassWithSourceCond()
 863 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
 864                                       jobject loader, const jbyte *buf,
 865                                       jsize len, jobject pd, const char *source,
 866                                       jboolean verify, TRAPS) {
 867   if (source == NULL)  source = "__JVM_DefineClass__";
 868 
 869   assert(THREAD->is_Java_thread(), "must be a JavaThread");
 870   JavaThread* jt = (JavaThread*) THREAD;
 871 
 872   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
 873                              ClassLoader::perf_define_appclass_selftime(),
 874                              ClassLoader::perf_define_appclasses(),
 875                              jt->get_thread_stat()->perf_recursion_counts_addr(),
 876                              jt->get_thread_stat()->perf_timers_addr(),
 877                              PerfClassTraceTime::DEFINE_CLASS);
 878 
 879   if (UsePerfData) {
 880     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
 881   }
 882 
 883   // Since exceptions can be thrown, class initialization can take place
 884   // if name is NULL no check for class name in .class stream has to be made.
 885   TempNewSymbol class_name = NULL;
 886   if (name != NULL) {
 887     const int str_len = (int)strlen(name);
 888     if (str_len > Symbol::max_length()) {
 889       // It's impossible to create this class;  the name cannot fit
 890       // into the constant pool.
 891       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 892     }
 893     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
 894   }
 895 
 896   ResourceMark rm(THREAD);
 897   ClassFileStream st((u1*) buf, len, (char *)source);
 898   Handle class_loader (THREAD, JNIHandles::resolve(loader));
 899   if (UsePerfData) {
 900     is_lock_held_by_thread(class_loader,
 901                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
 902                            THREAD);
 903   }
 904   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
 905   Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
 906                                                      protection_domain, &st,
 907                                                      verify != 0,
 908                                                      CHECK_NULL);
 909 
 910   if (TraceClassResolution && k != NULL) {
 911     trace_class_resolution(k);
 912   }
 913 
 914   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 915 }
 916 
 917 
 918 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
 919   JVMWrapper2("JVM_DefineClass %s", name);
 920 
 921   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
 922 JVM_END
 923 
 924 
 925 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
 926   JVMWrapper2("JVM_DefineClassWithSource %s", name);
 927 
 928   return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
 929 JVM_END
 930 
 931 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
 932                                                 jobject loader, const jbyte *buf,
 933                                                 jsize len, jobject pd,
 934                                                 const char *source, jboolean verify))
 935   JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
 936 
 937   return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
 938 JVM_END
 939 
 940 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
 941   JVMWrapper("JVM_FindLoadedClass");
 942   ResourceMark rm(THREAD);
 943 
 944   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
 945   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
 946 
 947   const char* str   = java_lang_String::as_utf8_string(string());
 948   // Sanity check, don't expect null
 949   if (str == NULL) return NULL;
 950 
 951   const int str_len = (int)strlen(str);
 952   if (str_len > Symbol::max_length()) {
 953     // It's impossible to create this class;  the name cannot fit
 954     // into the constant pool.
 955     return NULL;
 956   }
 957   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
 958 
 959   // Security Note:
 960   //   The Java level wrapper will perform the necessary security check allowing
 961   //   us to pass the NULL as the initiating class loader.
 962   Handle h_loader(THREAD, JNIHandles::resolve(loader));
 963   if (UsePerfData) {
 964     is_lock_held_by_thread(h_loader,
 965                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
 966                            THREAD);
 967   }
 968 
 969   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
 970                                                               h_loader,
 971                                                               Handle(),
 972                                                               CHECK_NULL);
 973 
 974   return (k == NULL) ? NULL :
 975             (jclass) JNIHandles::make_local(env, k->java_mirror());
 976 JVM_END
 977 
 978 
 979 // Reflection support //////////////////////////////////////////////////////////////////////////////
 980 
 981 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
 982   assert (cls != NULL, "illegal class");
 983   JVMWrapper("JVM_GetClassName");
 984   JvmtiVMObjectAllocEventCollector oam;
 985   ResourceMark rm(THREAD);
 986   const char* name;
 987   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
 988     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
 989   } else {
 990     // Consider caching interned string in Klass
 991     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
 992     assert(k->is_klass(), "just checking");
 993     name = k->external_name();
 994   }
 995   oop result = StringTable::intern((char*) name, CHECK_NULL);
 996   return (jstring) JNIHandles::make_local(env, result);
 997 JVM_END
 998 
 999 
1000 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1001   JVMWrapper("JVM_GetClassInterfaces");
1002   JvmtiVMObjectAllocEventCollector oam;
1003   oop mirror = JNIHandles::resolve_non_null(cls);
1004 
1005   // Special handling for primitive objects
1006   if (java_lang_Class::is_primitive(mirror)) {
1007     // Primitive objects does not have any interfaces
1008     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1009     return (jobjectArray) JNIHandles::make_local(env, r);
1010   }
1011 
1012   KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1013   // Figure size of result array
1014   int size;
1015   if (klass->oop_is_instance()) {
1016     size = InstanceKlass::cast(klass())->local_interfaces()->length();
1017   } else {
1018     assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1019     size = 2;
1020   }
1021 
1022   // Allocate result array
1023   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1024   objArrayHandle result (THREAD, r);
1025   // Fill in result
1026   if (klass->oop_is_instance()) {
1027     // Regular instance klass, fill in all local interfaces
1028     for (int index = 0; index < size; index++) {
1029       Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1030       result->obj_at_put(index, k->java_mirror());
1031     }
1032   } else {
1033     // All arrays implement java.lang.Cloneable and java.io.Serializable
1034     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1035     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1036   }
1037   return (jobjectArray) JNIHandles::make_local(env, result());
1038 JVM_END
1039 
1040 
1041 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1042   JVMWrapper("JVM_GetClassLoader");
1043   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1044     return NULL;
1045   }
1046   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1047   oop loader = k->class_loader();
1048   return JNIHandles::make_local(env, loader);
1049 JVM_END
1050 
1051 
1052 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1053   JVMWrapper("JVM_IsInterface");
1054   oop mirror = JNIHandles::resolve_non_null(cls);
1055   if (java_lang_Class::is_primitive(mirror)) {
1056     return JNI_FALSE;
1057   }
1058   Klass* k = java_lang_Class::as_Klass(mirror);
1059   jboolean result = k->is_interface();
1060   assert(!result || k->oop_is_instance(),
1061          "all interfaces are instance types");
1062   // The compiler intrinsic for isInterface tests the
1063   // Klass::_access_flags bits in the same way.
1064   return result;
1065 JVM_END
1066 
1067 
1068 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1069   JVMWrapper("JVM_GetClassSigners");
1070   JvmtiVMObjectAllocEventCollector oam;
1071   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1072     // There are no signers for primitive types
1073     return NULL;
1074   }
1075 
1076   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1077 
1078   // If there are no signers set in the class, or if the class
1079   // is an array, return NULL.
1080   if (signers == NULL) return NULL;
1081 
1082   // copy of the signers array
1083   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1084   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1085   for (int index = 0; index < signers->length(); index++) {
1086     signers_copy->obj_at_put(index, signers->obj_at(index));
1087   }
1088 
1089   // return the copy
1090   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1091 JVM_END
1092 
1093 
1094 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1095   JVMWrapper("JVM_SetClassSigners");
1096   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1097     // This call is ignored for primitive types and arrays.
1098     // Signers are only set once, ClassLoader.java, and thus shouldn't
1099     // be called with an array.  Only the bootstrap loader creates arrays.
1100     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1101     if (k->oop_is_instance()) {
1102       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1103     }
1104   }
1105 JVM_END
1106 
1107 
1108 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1109   JVMWrapper("JVM_GetProtectionDomain");
1110   if (JNIHandles::resolve(cls) == NULL) {
1111     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1112   }
1113 
1114   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1115     // Primitive types does not have a protection domain.
1116     return NULL;
1117   }
1118 
1119   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1120   return (jobject) JNIHandles::make_local(env, pd);
1121 JVM_END
1122 
1123 
1124 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1125   // If there is a security manager and protection domain, check the access
1126   // in the protection domain, otherwise it is authorized.
1127   if (java_lang_System::has_security_manager()) {
1128 
1129     // For bootstrapping, if pd implies method isn't in the JDK, allow
1130     // this context to revert to older behavior.
1131     // In this case the isAuthorized field in AccessControlContext is also not
1132     // present.
1133     if (Universe::protection_domain_implies_method() == NULL) {
1134       return true;
1135     }
1136 
1137     // Whitelist certain access control contexts
1138     if (java_security_AccessControlContext::is_authorized(context)) {
1139       return true;
1140     }
1141 
1142     oop prot = klass->protection_domain();
1143     if (prot != NULL) {
1144       // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1145       // in the new wrapper.
1146       methodHandle m(THREAD, Universe::protection_domain_implies_method());
1147       Handle h_prot(THREAD, prot);
1148       JavaValue result(T_BOOLEAN);
1149       JavaCallArguments args(h_prot);
1150       JavaCalls::call(&result, m, &args, CHECK_false);
1151       return (result.get_jboolean() != 0);
1152     }
1153   }
1154   return true;
1155 }
1156 
1157 // Create an AccessControlContext with a protection domain with null codesource
1158 // and null permissions - which gives no permissions.
1159 oop create_dummy_access_control_context(TRAPS) {
1160   InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1161   // new ProtectionDomain(null,null);
1162   oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1163   Handle null_pd(THREAD, null_protection_domain);
1164 
1165   // new ProtectionDomain[] {pd};
1166   objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1167   context->obj_at_put(0, null_pd());
1168 
1169   // new AccessControlContext(new ProtectionDomain[] {pd})
1170   objArrayHandle h_context(THREAD, context);
1171   oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1172   return result;
1173 }
1174 
1175 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1176   JVMWrapper("JVM_DoPrivileged");
1177 
1178   if (action == NULL) {
1179     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1180   }
1181 
1182   // Compute the frame initiating the do privileged operation and setup the privileged stack
1183   vframeStream vfst(thread);
1184   vfst.security_get_caller_frame(1);
1185 
1186   if (vfst.at_end()) {
1187     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1188   }
1189 
1190   Method* method        = vfst.method();
1191   instanceKlassHandle klass (THREAD, method->method_holder());
1192 
1193   // Check that action object understands "Object run()"
1194   Handle h_context;
1195   if (context != NULL) {
1196     h_context = Handle(THREAD, JNIHandles::resolve(context));
1197     bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1198     if (!authorized) {
1199       // Create an unprivileged access control object and call it's run function
1200       // instead.
1201       oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1202       h_context = Handle(THREAD, noprivs);
1203     }
1204   }
1205 
1206   // Check that action object understands "Object run()"
1207   Handle object (THREAD, JNIHandles::resolve(action));
1208 
1209   // get run() method
1210   Method* m_oop = object->klass()->uncached_lookup_method(
1211                                            vmSymbols::run_method_name(),
1212                                            vmSymbols::void_object_signature());
1213   methodHandle m (THREAD, m_oop);
1214   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1215     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1216   }
1217 
1218   // Stack allocated list of privileged stack elements
1219   PrivilegedElement pi;
1220   if (!vfst.at_end()) {
1221     pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1222     thread->set_privileged_stack_top(&pi);
1223   }
1224 
1225 
1226   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1227   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1228   Handle pending_exception;
1229   JavaValue result(T_OBJECT);
1230   JavaCallArguments args(object);
1231   JavaCalls::call(&result, m, &args, THREAD);
1232 
1233   // done with action, remove ourselves from the list
1234   if (!vfst.at_end()) {
1235     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1236     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1237   }
1238 
1239   if (HAS_PENDING_EXCEPTION) {
1240     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1241     CLEAR_PENDING_EXCEPTION;
1242 
1243     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1244         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1245       // Throw a java.security.PrivilegedActionException(Exception e) exception
1246       JavaCallArguments args(pending_exception);
1247       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1248                   vmSymbols::exception_void_signature(),
1249                   &args);
1250     }
1251   }
1252 
1253   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1254   return JNIHandles::make_local(env, (oop) result.get_jobject());
1255 JVM_END
1256 
1257 
1258 // Returns the inherited_access_control_context field of the running thread.
1259 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1260   JVMWrapper("JVM_GetInheritedAccessControlContext");
1261   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1262   return JNIHandles::make_local(env, result);
1263 JVM_END
1264 
1265 class RegisterArrayForGC {
1266  private:
1267   JavaThread *_thread;
1268  public:
1269   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
1270     _thread = thread;
1271     _thread->register_array_for_gc(array);
1272   }
1273 
1274   ~RegisterArrayForGC() {
1275     _thread->register_array_for_gc(NULL);
1276   }
1277 };
1278 
1279 
1280 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1281   JVMWrapper("JVM_GetStackAccessControlContext");
1282   if (!UsePrivilegedStack) return NULL;
1283 
1284   ResourceMark rm(THREAD);
1285   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1286   JvmtiVMObjectAllocEventCollector oam;
1287 
1288   // count the protection domains on the execution stack. We collapse
1289   // duplicate consecutive protection domains into a single one, as
1290   // well as stopping when we hit a privileged frame.
1291 
1292   // Use vframeStream to iterate through Java frames
1293   vframeStream vfst(thread);
1294 
1295   oop previous_protection_domain = NULL;
1296   Handle privileged_context(thread, NULL);
1297   bool is_privileged = false;
1298   oop protection_domain = NULL;
1299 
1300   for(; !vfst.at_end(); vfst.next()) {
1301     // get method of frame
1302     Method* method = vfst.method();
1303     intptr_t* frame_id   = vfst.frame_id();
1304 
1305     // check the privileged frames to see if we have a match
1306     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1307       // this frame is privileged
1308       is_privileged = true;
1309       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1310       protection_domain  = thread->privileged_stack_top()->protection_domain();
1311     } else {
1312       protection_domain = method->method_holder()->protection_domain();
1313     }
1314 
1315     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1316       local_array->push(protection_domain);
1317       previous_protection_domain = protection_domain;
1318     }
1319 
1320     if (is_privileged) break;
1321   }
1322 
1323 
1324   // either all the domains on the stack were system domains, or
1325   // we had a privileged system domain
1326   if (local_array->is_empty()) {
1327     if (is_privileged && privileged_context.is_null()) return NULL;
1328 
1329     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1330     return JNIHandles::make_local(env, result);
1331   }
1332 
1333   // the resource area must be registered in case of a gc
1334   RegisterArrayForGC ragc(thread, local_array);
1335   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1336                                                  local_array->length(), CHECK_NULL);
1337   objArrayHandle h_context(thread, context);
1338   for (int index = 0; index < local_array->length(); index++) {
1339     h_context->obj_at_put(index, local_array->at(index));
1340   }
1341 
1342   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1343 
1344   return JNIHandles::make_local(env, result);
1345 JVM_END
1346 
1347 
1348 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1349   JVMWrapper("JVM_IsArrayClass");
1350   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1351   return (k != NULL) && k->oop_is_array() ? true : false;
1352 JVM_END
1353 
1354 
1355 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1356   JVMWrapper("JVM_IsPrimitiveClass");
1357   oop mirror = JNIHandles::resolve_non_null(cls);
1358   return (jboolean) java_lang_Class::is_primitive(mirror);
1359 JVM_END
1360 
1361 
1362 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1363   JVMWrapper("JVM_GetComponentType");
1364   oop mirror = JNIHandles::resolve_non_null(cls);
1365   oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1366   return (jclass) JNIHandles::make_local(env, result);
1367 JVM_END
1368 
1369 
1370 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1371   JVMWrapper("JVM_GetClassModifiers");
1372   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1373     // Primitive type
1374     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1375   }
1376 
1377   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1378   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1379   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1380   return k->modifier_flags();
1381 JVM_END
1382 
1383 
1384 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1385 
1386 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1387   JvmtiVMObjectAllocEventCollector oam;
1388   // ofClass is a reference to a java_lang_Class object. The mirror object
1389   // of an InstanceKlass
1390 
1391   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1392       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1393     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1394     return (jobjectArray)JNIHandles::make_local(env, result);
1395   }
1396 
1397   instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1398   InnerClassesIterator iter(k);
1399 
1400   if (iter.length() == 0) {
1401     // Neither an inner nor outer class
1402     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1403     return (jobjectArray)JNIHandles::make_local(env, result);
1404   }
1405 
1406   // find inner class info
1407   constantPoolHandle cp(thread, k->constants());
1408   int length = iter.length();
1409 
1410   // Allocate temp. result array
1411   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1412   objArrayHandle result (THREAD, r);
1413   int members = 0;
1414 
1415   for (; !iter.done(); iter.next()) {
1416     int ioff = iter.inner_class_info_index();
1417     int ooff = iter.outer_class_info_index();
1418 
1419     if (ioff != 0 && ooff != 0) {
1420       // Check to see if the name matches the class we're looking for
1421       // before attempting to find the class.
1422       if (cp->klass_name_at_matches(k, ooff)) {
1423         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1424         if (outer_klass == k()) {
1425            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1426            instanceKlassHandle inner_klass (THREAD, ik);
1427 
1428            // Throws an exception if outer klass has not declared k as
1429            // an inner klass
1430            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1431 
1432            result->obj_at_put(members, inner_klass->java_mirror());
1433            members++;
1434         }
1435       }
1436     }
1437   }
1438 
1439   if (members != length) {
1440     // Return array of right length
1441     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1442     for(int i = 0; i < members; i++) {
1443       res->obj_at_put(i, result->obj_at(i));
1444     }
1445     return (jobjectArray)JNIHandles::make_local(env, res);
1446   }
1447 
1448   return (jobjectArray)JNIHandles::make_local(env, result());
1449 JVM_END
1450 
1451 
1452 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1453 {
1454   // ofClass is a reference to a java_lang_Class object.
1455   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1456       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1457     return NULL;
1458   }
1459 
1460   bool inner_is_member = false;
1461   Klass* outer_klass
1462     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1463                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1464   if (outer_klass == NULL)  return NULL;  // already a top-level class
1465   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
1466   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1467 }
1468 JVM_END
1469 
1470 // should be in InstanceKlass.cpp, but is here for historical reasons
1471 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1472                                                      bool* inner_is_member,
1473                                                      TRAPS) {
1474   Thread* thread = THREAD;
1475   InnerClassesIterator iter(k);
1476   if (iter.length() == 0) {
1477     // No inner class info => no declaring class
1478     return NULL;
1479   }
1480 
1481   constantPoolHandle i_cp(thread, k->constants());
1482 
1483   bool found = false;
1484   Klass* ok;
1485   instanceKlassHandle outer_klass;
1486   *inner_is_member = false;
1487 
1488   // Find inner_klass attribute
1489   for (; !iter.done() && !found; iter.next()) {
1490     int ioff = iter.inner_class_info_index();
1491     int ooff = iter.outer_class_info_index();
1492     int noff = iter.inner_name_index();
1493     if (ioff != 0) {
1494       // Check to see if the name matches the class we're looking for
1495       // before attempting to find the class.
1496       if (i_cp->klass_name_at_matches(k, ioff)) {
1497         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1498         found = (k() == inner_klass);
1499         if (found && ooff != 0) {
1500           ok = i_cp->klass_at(ooff, CHECK_NULL);
1501           outer_klass = instanceKlassHandle(thread, ok);
1502           *inner_is_member = true;
1503         }
1504       }
1505     }
1506   }
1507 
1508   if (found && outer_klass.is_null()) {
1509     // It may be anonymous; try for that.
1510     int encl_method_class_idx = k->enclosing_method_class_index();
1511     if (encl_method_class_idx != 0) {
1512       ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1513       outer_klass = instanceKlassHandle(thread, ok);
1514       *inner_is_member = false;
1515     }
1516   }
1517 
1518   // If no inner class attribute found for this class.
1519   if (outer_klass.is_null())  return NULL;
1520 
1521   // Throws an exception if outer klass has not declared k as an inner klass
1522   // We need evidence that each klass knows about the other, or else
1523   // the system could allow a spoof of an inner class to gain access rights.
1524   Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1525   return outer_klass();
1526 }
1527 
1528 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1529   assert (cls != NULL, "illegal class");
1530   JVMWrapper("JVM_GetClassSignature");
1531   JvmtiVMObjectAllocEventCollector oam;
1532   ResourceMark rm(THREAD);
1533   // Return null for arrays and primatives
1534   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1535     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1536     if (k->oop_is_instance()) {
1537       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1538       if (sym == NULL) return NULL;
1539       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1540       return (jstring) JNIHandles::make_local(env, str());
1541     }
1542   }
1543   return NULL;
1544 JVM_END
1545 
1546 
1547 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1548   assert (cls != NULL, "illegal class");
1549   JVMWrapper("JVM_GetClassAnnotations");
1550 
1551   // Return null for arrays and primitives
1552   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1553     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1554     if (k->oop_is_instance()) {
1555       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1556       return (jbyteArray) JNIHandles::make_local(env, a);
1557     }
1558   }
1559   return NULL;
1560 JVM_END
1561 
1562 
1563 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1564   // some of this code was adapted from from jni_FromReflectedField
1565 
1566   oop reflected = JNIHandles::resolve_non_null(field);
1567   oop mirror    = java_lang_reflect_Field::clazz(reflected);
1568   Klass* k    = java_lang_Class::as_Klass(mirror);
1569   int slot      = java_lang_reflect_Field::slot(reflected);
1570   int modifiers = java_lang_reflect_Field::modifiers(reflected);
1571 
1572   KlassHandle kh(THREAD, k);
1573   intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1574 
1575   if (modifiers & JVM_ACC_STATIC) {
1576     // for static fields we only look in the current class
1577     if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1578       assert(false, "cannot find static field");
1579       return false;
1580     }
1581   } else {
1582     // for instance fields we start with the current class and work
1583     // our way up through the superclass chain
1584     if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1585       assert(false, "cannot find instance field");
1586       return false;
1587     }
1588   }
1589   return true;
1590 }
1591 
1592 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1593   // field is a handle to a java.lang.reflect.Field object
1594   assert(field != NULL, "illegal field");
1595   JVMWrapper("JVM_GetFieldAnnotations");
1596 
1597   fieldDescriptor fd;
1598   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1599   if (!gotFd) {
1600     return NULL;
1601   }
1602 
1603   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1604 JVM_END
1605 
1606 
1607 static Method* jvm_get_method_common(jobject method) {
1608   // some of this code was adapted from from jni_FromReflectedMethod
1609 
1610   oop reflected = JNIHandles::resolve_non_null(method);
1611   oop mirror    = NULL;
1612   int slot      = 0;
1613 
1614   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1615     mirror = java_lang_reflect_Constructor::clazz(reflected);
1616     slot   = java_lang_reflect_Constructor::slot(reflected);
1617   } else {
1618     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1619            "wrong type");
1620     mirror = java_lang_reflect_Method::clazz(reflected);
1621     slot   = java_lang_reflect_Method::slot(reflected);
1622   }
1623   Klass* k = java_lang_Class::as_Klass(mirror);
1624 
1625   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1626   assert(m != NULL, "cannot find method");
1627   return m;  // caller has to deal with NULL in product mode
1628 }
1629 
1630 
1631 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1632   JVMWrapper("JVM_GetMethodAnnotations");
1633 
1634   // method is a handle to a java.lang.reflect.Method object
1635   Method* m = jvm_get_method_common(method);
1636   if (m == NULL) {
1637     return NULL;
1638   }
1639 
1640   return (jbyteArray) JNIHandles::make_local(env,
1641     Annotations::make_java_array(m->annotations(), THREAD));
1642 JVM_END
1643 
1644 
1645 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1646   JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1647 
1648   // method is a handle to a java.lang.reflect.Method object
1649   Method* m = jvm_get_method_common(method);
1650   if (m == NULL) {
1651     return NULL;
1652   }
1653 
1654   return (jbyteArray) JNIHandles::make_local(env,
1655     Annotations::make_java_array(m->annotation_default(), THREAD));
1656 JVM_END
1657 
1658 
1659 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1660   JVMWrapper("JVM_GetMethodParameterAnnotations");
1661 
1662   // method is a handle to a java.lang.reflect.Method object
1663   Method* m = jvm_get_method_common(method);
1664   if (m == NULL) {
1665     return NULL;
1666   }
1667 
1668   return (jbyteArray) JNIHandles::make_local(env,
1669     Annotations::make_java_array(m->parameter_annotations(), THREAD));
1670 JVM_END
1671 
1672 /* Type use annotations support (JDK 1.8) */
1673 
1674 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1675   assert (cls != NULL, "illegal class");
1676   JVMWrapper("JVM_GetClassTypeAnnotations");
1677   ResourceMark rm(THREAD);
1678   // Return null for arrays and primitives
1679   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1680     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1681     if (k->oop_is_instance()) {
1682       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1683       if (type_annotations != NULL) {
1684         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1685         return (jbyteArray) JNIHandles::make_local(env, a);
1686       }
1687     }
1688   }
1689   return NULL;
1690 JVM_END
1691 
1692 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1693   assert (method != NULL, "illegal method");
1694   JVMWrapper("JVM_GetMethodTypeAnnotations");
1695 
1696   // method is a handle to a java.lang.reflect.Method object
1697   Method* m = jvm_get_method_common(method);
1698   if (m == NULL) {
1699     return NULL;
1700   }
1701 
1702   AnnotationArray* type_annotations = m->type_annotations();
1703   if (type_annotations != NULL) {
1704     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1705     return (jbyteArray) JNIHandles::make_local(env, a);
1706   }
1707 
1708   return NULL;
1709 JVM_END
1710 
1711 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1712   assert (field != NULL, "illegal field");
1713   JVMWrapper("JVM_GetFieldTypeAnnotations");
1714 
1715   fieldDescriptor fd;
1716   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1717   if (!gotFd) {
1718     return NULL;
1719   }
1720 
1721   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1722 JVM_END
1723 
1724 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1725   if (!cp->is_within_bounds(index)) {
1726     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1727   }
1728 }
1729 
1730 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1731 {
1732   JVMWrapper("JVM_GetMethodParameters");
1733   // method is a handle to a java.lang.reflect.Method object
1734   Method* method_ptr = jvm_get_method_common(method);
1735   methodHandle mh (THREAD, method_ptr);
1736   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1737   const int num_params = mh->method_parameters_length();
1738 
1739   if (0 != num_params) {
1740     // make sure all the symbols are properly formatted
1741     for (int i = 0; i < num_params; i++) {
1742       MethodParametersElement* params = mh->method_parameters_start();
1743       int index = params[i].name_cp_index;
1744       bounds_check(mh->constants(), index, CHECK_NULL);
1745 
1746       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1747         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1748                     "Wrong type at constant pool index");
1749       }
1750 
1751     }
1752 
1753     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1754     objArrayHandle result (THREAD, result_oop);
1755 
1756     for (int i = 0; i < num_params; i++) {
1757       MethodParametersElement* params = mh->method_parameters_start();
1758       // For a 0 index, give a NULL symbol
1759       Symbol* sym = 0 != params[i].name_cp_index ?
1760         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1761       int flags = params[i].flags;
1762       oop param = Reflection::new_parameter(reflected_method, i, sym,
1763                                             flags, CHECK_NULL);
1764       result->obj_at_put(i, param);
1765     }
1766     return (jobjectArray)JNIHandles::make_local(env, result());
1767   } else {
1768     return (jobjectArray)NULL;
1769   }
1770 }
1771 JVM_END
1772 
1773 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1774 
1775 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1776 {
1777   JVMWrapper("JVM_GetClassDeclaredFields");
1778   JvmtiVMObjectAllocEventCollector oam;
1779 
1780   // Exclude primitive types and array types
1781   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1782       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1783     // Return empty array
1784     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1785     return (jobjectArray) JNIHandles::make_local(env, res);
1786   }
1787 
1788   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1789   constantPoolHandle cp(THREAD, k->constants());
1790 
1791   // Ensure class is linked
1792   k->link_class(CHECK_NULL);
1793 
1794   // 4496456 We need to filter out java.lang.Throwable.backtrace
1795   bool skip_backtrace = false;
1796 
1797   // Allocate result
1798   int num_fields;
1799 
1800   if (publicOnly) {
1801     num_fields = 0;
1802     for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1803       if (fs.access_flags().is_public()) ++num_fields;
1804     }
1805   } else {
1806     num_fields = k->java_fields_count();
1807 
1808     if (k() == SystemDictionary::Throwable_klass()) {
1809       num_fields--;
1810       skip_backtrace = true;
1811     }
1812   }
1813 
1814   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1815   objArrayHandle result (THREAD, r);
1816 
1817   int out_idx = 0;
1818   fieldDescriptor fd;
1819   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1820     if (skip_backtrace) {
1821       // 4496456 skip java.lang.Throwable.backtrace
1822       int offset = fs.offset();
1823       if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1824     }
1825 
1826     if (!publicOnly || fs.access_flags().is_public()) {
1827       fd.initialize(k(), fs.index());
1828       oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1829       result->obj_at_put(out_idx, field);
1830       ++out_idx;
1831     }
1832   }
1833   assert(out_idx == num_fields, "just checking");
1834   return (jobjectArray) JNIHandles::make_local(env, result());
1835 }
1836 JVM_END
1837 
1838 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1839 {
1840   JVMWrapper("JVM_GetClassDeclaredMethods");
1841   JvmtiVMObjectAllocEventCollector oam;
1842 
1843   // Exclude primitive types and array types
1844   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1845       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1846     // Return empty array
1847     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1848     return (jobjectArray) JNIHandles::make_local(env, res);
1849   }
1850 
1851   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1852 
1853   // Ensure class is linked
1854   k->link_class(CHECK_NULL);
1855 
1856   Array<Method*>* methods = k->methods();
1857   int methods_length = methods->length();
1858   int num_methods = 0;
1859 
1860   int i;
1861   for (i = 0; i < methods_length; i++) {
1862     methodHandle method(THREAD, methods->at(i));
1863     if (!method->is_initializer() && !method->is_overpass()) {
1864       if (!publicOnly || method->is_public()) {
1865         ++num_methods;
1866       }
1867     }
1868   }
1869 
1870   // Allocate result
1871   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1872   objArrayHandle result (THREAD, r);
1873 
1874   int out_idx = 0;
1875   for (i = 0; i < methods_length; i++) {
1876     methodHandle method(THREAD, methods->at(i));
1877     if (!method->is_initializer() && !method->is_overpass()) {
1878       if (!publicOnly || method->is_public()) {
1879         oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1880         result->obj_at_put(out_idx, m);
1881         ++out_idx;
1882       }
1883     }
1884   }
1885   assert(out_idx == num_methods, "just checking");
1886   return (jobjectArray) JNIHandles::make_local(env, result());
1887 }
1888 JVM_END
1889 
1890 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1891 {
1892   JVMWrapper("JVM_GetClassDeclaredConstructors");
1893   JvmtiVMObjectAllocEventCollector oam;
1894 
1895   // Exclude primitive types and array types
1896   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1897       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1898     // Return empty array
1899     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1900     return (jobjectArray) JNIHandles::make_local(env, res);
1901   }
1902 
1903   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1904 
1905   // Ensure class is linked
1906   k->link_class(CHECK_NULL);
1907 
1908   Array<Method*>* methods = k->methods();
1909   int methods_length = methods->length();
1910   int num_constructors = 0;
1911 
1912   int i;
1913   for (i = 0; i < methods_length; i++) {
1914     methodHandle method(THREAD, methods->at(i));
1915     if (method->is_initializer() && !method->is_static()) {
1916       if (!publicOnly || method->is_public()) {
1917         ++num_constructors;
1918       }
1919     }
1920   }
1921 
1922   // Allocate result
1923   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1924   objArrayHandle result(THREAD, r);
1925 
1926   int out_idx = 0;
1927   for (i = 0; i < methods_length; i++) {
1928     methodHandle method(THREAD, methods->at(i));
1929     if (method->is_initializer() && !method->is_static()) {
1930       if (!publicOnly || method->is_public()) {
1931         oop m = Reflection::new_constructor(method, CHECK_NULL);
1932         result->obj_at_put(out_idx, m);
1933         ++out_idx;
1934       }
1935     }
1936   }
1937   assert(out_idx == num_constructors, "just checking");
1938   return (jobjectArray) JNIHandles::make_local(env, result());
1939 }
1940 JVM_END
1941 
1942 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1943 {
1944   JVMWrapper("JVM_GetClassAccessFlags");
1945   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1946     // Primitive type
1947     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1948   }
1949 
1950   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1951   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1952 }
1953 JVM_END
1954 
1955 
1956 // Constant pool access //////////////////////////////////////////////////////////
1957 
1958 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1959 {
1960   JVMWrapper("JVM_GetClassConstantPool");
1961   JvmtiVMObjectAllocEventCollector oam;
1962 
1963   // Return null for primitives and arrays
1964   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1965     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1966     if (k->oop_is_instance()) {
1967       instanceKlassHandle k_h(THREAD, k);
1968       Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1969       sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1970       return JNIHandles::make_local(jcp());
1971     }
1972   }
1973   return NULL;
1974 }
1975 JVM_END
1976 
1977 
1978 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1979 {
1980   JVMWrapper("JVM_ConstantPoolGetSize");
1981   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982   return cp->length();
1983 }
1984 JVM_END
1985 
1986 
1987 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1988 {
1989   JVMWrapper("JVM_ConstantPoolGetClassAt");
1990   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1991   bounds_check(cp, index, CHECK_NULL);
1992   constantTag tag = cp->tag_at(index);
1993   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1994     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1995   }
1996   Klass* k = cp->klass_at(index, CHECK_NULL);
1997   return (jclass) JNIHandles::make_local(k->java_mirror());
1998 }
1999 JVM_END
2000 
2001 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2002 {
2003   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2004   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2005   bounds_check(cp, index, CHECK_NULL);
2006   constantTag tag = cp->tag_at(index);
2007   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2008     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2009   }
2010   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2011   if (k == NULL) return NULL;
2012   return (jclass) JNIHandles::make_local(k->java_mirror());
2013 }
2014 JVM_END
2015 
2016 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2017   constantTag tag = cp->tag_at(index);
2018   if (!tag.is_method() && !tag.is_interface_method()) {
2019     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2020   }
2021   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2022   Klass* k_o;
2023   if (force_resolution) {
2024     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2025   } else {
2026     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2027     if (k_o == NULL) return NULL;
2028   }
2029   instanceKlassHandle k(THREAD, k_o);
2030   Symbol* name = cp->uncached_name_ref_at(index);
2031   Symbol* sig  = cp->uncached_signature_ref_at(index);
2032   methodHandle m (THREAD, k->find_method(name, sig));
2033   if (m.is_null()) {
2034     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2035   }
2036   oop method;
2037   if (!m->is_initializer() || m->is_static()) {
2038     method = Reflection::new_method(m, true, true, CHECK_NULL);
2039   } else {
2040     method = Reflection::new_constructor(m, CHECK_NULL);
2041   }
2042   return JNIHandles::make_local(method);
2043 }
2044 
2045 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2046 {
2047   JVMWrapper("JVM_ConstantPoolGetMethodAt");
2048   JvmtiVMObjectAllocEventCollector oam;
2049   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2050   bounds_check(cp, index, CHECK_NULL);
2051   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2052   return res;
2053 }
2054 JVM_END
2055 
2056 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2057 {
2058   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2059   JvmtiVMObjectAllocEventCollector oam;
2060   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2061   bounds_check(cp, index, CHECK_NULL);
2062   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2063   return res;
2064 }
2065 JVM_END
2066 
2067 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2068   constantTag tag = cp->tag_at(index);
2069   if (!tag.is_field()) {
2070     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2071   }
2072   int klass_ref  = cp->uncached_klass_ref_index_at(index);
2073   Klass* k_o;
2074   if (force_resolution) {
2075     k_o = cp->klass_at(klass_ref, CHECK_NULL);
2076   } else {
2077     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2078     if (k_o == NULL) return NULL;
2079   }
2080   instanceKlassHandle k(THREAD, k_o);
2081   Symbol* name = cp->uncached_name_ref_at(index);
2082   Symbol* sig  = cp->uncached_signature_ref_at(index);
2083   fieldDescriptor fd;
2084   Klass* target_klass = k->find_field(name, sig, &fd);
2085   if (target_klass == NULL) {
2086     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2087   }
2088   oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2089   return JNIHandles::make_local(field);
2090 }
2091 
2092 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2093 {
2094   JVMWrapper("JVM_ConstantPoolGetFieldAt");
2095   JvmtiVMObjectAllocEventCollector oam;
2096   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2097   bounds_check(cp, index, CHECK_NULL);
2098   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2099   return res;
2100 }
2101 JVM_END
2102 
2103 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2104 {
2105   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2106   JvmtiVMObjectAllocEventCollector oam;
2107   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2108   bounds_check(cp, index, CHECK_NULL);
2109   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2110   return res;
2111 }
2112 JVM_END
2113 
2114 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2115 {
2116   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2117   JvmtiVMObjectAllocEventCollector oam;
2118   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119   bounds_check(cp, index, CHECK_NULL);
2120   constantTag tag = cp->tag_at(index);
2121   if (!tag.is_field_or_method()) {
2122     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123   }
2124   int klass_ref = cp->uncached_klass_ref_index_at(index);
2125   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
2126   Symbol*  member_name = cp->uncached_name_ref_at(index);
2127   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
2128   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2129   objArrayHandle dest(THREAD, dest_o);
2130   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2131   dest->obj_at_put(0, str());
2132   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2133   dest->obj_at_put(1, str());
2134   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2135   dest->obj_at_put(2, str());
2136   return (jobjectArray) JNIHandles::make_local(dest());
2137 }
2138 JVM_END
2139 
2140 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2141 {
2142   JVMWrapper("JVM_ConstantPoolGetIntAt");
2143   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2144   bounds_check(cp, index, CHECK_0);
2145   constantTag tag = cp->tag_at(index);
2146   if (!tag.is_int()) {
2147     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2148   }
2149   return cp->int_at(index);
2150 }
2151 JVM_END
2152 
2153 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155   JVMWrapper("JVM_ConstantPoolGetLongAt");
2156   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157   bounds_check(cp, index, CHECK_(0L));
2158   constantTag tag = cp->tag_at(index);
2159   if (!tag.is_long()) {
2160     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161   }
2162   return cp->long_at(index);
2163 }
2164 JVM_END
2165 
2166 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2167 {
2168   JVMWrapper("JVM_ConstantPoolGetFloatAt");
2169   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2170   bounds_check(cp, index, CHECK_(0.0f));
2171   constantTag tag = cp->tag_at(index);
2172   if (!tag.is_float()) {
2173     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2174   }
2175   return cp->float_at(index);
2176 }
2177 JVM_END
2178 
2179 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2180 {
2181   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2182   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2183   bounds_check(cp, index, CHECK_(0.0));
2184   constantTag tag = cp->tag_at(index);
2185   if (!tag.is_double()) {
2186     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2187   }
2188   return cp->double_at(index);
2189 }
2190 JVM_END
2191 
2192 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2193 {
2194   JVMWrapper("JVM_ConstantPoolGetStringAt");
2195   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2196   bounds_check(cp, index, CHECK_NULL);
2197   constantTag tag = cp->tag_at(index);
2198   if (!tag.is_string()) {
2199     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2200   }
2201   oop str = cp->string_at(index, CHECK_NULL);
2202   return (jstring) JNIHandles::make_local(str);
2203 }
2204 JVM_END
2205 
2206 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2207 {
2208   JVMWrapper("JVM_ConstantPoolGetUTF8At");
2209   JvmtiVMObjectAllocEventCollector oam;
2210   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211   bounds_check(cp, index, CHECK_NULL);
2212   constantTag tag = cp->tag_at(index);
2213   if (!tag.is_symbol()) {
2214     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215   }
2216   Symbol* sym = cp->symbol_at(index);
2217   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2218   return (jstring) JNIHandles::make_local(str());
2219 }
2220 JVM_END
2221 
2222 
2223 // Assertion support. //////////////////////////////////////////////////////////
2224 
2225 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2226   JVMWrapper("JVM_DesiredAssertionStatus");
2227   assert(cls != NULL, "bad class");
2228 
2229   oop r = JNIHandles::resolve(cls);
2230   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2231   if (java_lang_Class::is_primitive(r)) return false;
2232 
2233   Klass* k = java_lang_Class::as_Klass(r);
2234   assert(k->oop_is_instance(), "must be an instance klass");
2235   if (! k->oop_is_instance()) return false;
2236 
2237   ResourceMark rm(THREAD);
2238   const char* name = k->name()->as_C_string();
2239   bool system_class = k->class_loader() == NULL;
2240   return JavaAssertions::enabled(name, system_class);
2241 
2242 JVM_END
2243 
2244 
2245 // Return a new AssertionStatusDirectives object with the fields filled in with
2246 // command-line assertion arguments (i.e., -ea, -da).
2247 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2248   JVMWrapper("JVM_AssertionStatusDirectives");
2249   JvmtiVMObjectAllocEventCollector oam;
2250   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2251   return JNIHandles::make_local(env, asd);
2252 JVM_END
2253 
2254 // Verification ////////////////////////////////////////////////////////////////////////////////
2255 
2256 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2257 
2258 // RedefineClasses support: bug 6214132 caused verification to fail.
2259 // All functions from this section should call the jvmtiThreadSate function:
2260 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
2261 // The function returns a Klass* of the _scratch_class if the verifier
2262 // was invoked in the middle of the class redefinition.
2263 // Otherwise it returns its argument value which is the _the_class Klass*.
2264 // Please, refer to the description in the jvmtiThreadSate.hpp.
2265 
2266 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2267   JVMWrapper("JVM_GetClassNameUTF");
2268   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2269   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2270   return k->name()->as_utf8();
2271 JVM_END
2272 
2273 
2274 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2275   JVMWrapper("JVM_GetClassCPTypes");
2276   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2277   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2278   // types will have length zero if this is not an InstanceKlass
2279   // (length is determined by call to JVM_GetClassCPEntriesCount)
2280   if (k->oop_is_instance()) {
2281     ConstantPool* cp = InstanceKlass::cast(k)->constants();
2282     for (int index = cp->length() - 1; index >= 0; index--) {
2283       constantTag tag = cp->tag_at(index);
2284       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2285   }
2286   }
2287 JVM_END
2288 
2289 
2290 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2291   JVMWrapper("JVM_GetClassCPEntriesCount");
2292   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294   if (!k->oop_is_instance())
2295     return 0;
2296   return InstanceKlass::cast(k)->constants()->length();
2297 JVM_END
2298 
2299 
2300 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2301   JVMWrapper("JVM_GetClassFieldsCount");
2302   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2304   if (!k->oop_is_instance())
2305     return 0;
2306   return InstanceKlass::cast(k)->java_fields_count();
2307 JVM_END
2308 
2309 
2310 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2311   JVMWrapper("JVM_GetClassMethodsCount");
2312   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2313   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2314   if (!k->oop_is_instance())
2315     return 0;
2316   return InstanceKlass::cast(k)->methods()->length();
2317 JVM_END
2318 
2319 
2320 // The following methods, used for the verifier, are never called with
2321 // array klasses, so a direct cast to InstanceKlass is safe.
2322 // Typically, these methods are called in a loop with bounds determined
2323 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2324 // zero for arrays.
2325 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2326   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2327   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2330   int length = method->checked_exceptions_length();
2331   if (length > 0) {
2332     CheckedExceptionElement* table= method->checked_exceptions_start();
2333     for (int i = 0; i < length; i++) {
2334       exceptions[i] = table[i].class_cp_index;
2335     }
2336   }
2337 JVM_END
2338 
2339 
2340 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2341   JVMWrapper("JVM_GetMethodIxExceptionsCount");
2342   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2345   return method->checked_exceptions_length();
2346 JVM_END
2347 
2348 
2349 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2350   JVMWrapper("JVM_GetMethodIxByteCode");
2351   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2352   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2353   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2354   memcpy(code, method->code_base(), method->code_size());
2355 JVM_END
2356 
2357 
2358 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2359   JVMWrapper("JVM_GetMethodIxByteCodeLength");
2360   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363   return method->code_size();
2364 JVM_END
2365 
2366 
2367 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2368   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2369   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372   ExceptionTable extable(method);
2373   entry->start_pc   = extable.start_pc(entry_index);
2374   entry->end_pc     = extable.end_pc(entry_index);
2375   entry->handler_pc = extable.handler_pc(entry_index);
2376   entry->catchType  = extable.catch_type_index(entry_index);
2377 JVM_END
2378 
2379 
2380 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2381   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2382   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2383   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2384   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2385   return method->exception_table_length();
2386 JVM_END
2387 
2388 
2389 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2390   JVMWrapper("JVM_GetMethodIxModifiers");
2391   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2392   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2393   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2394   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2395 JVM_END
2396 
2397 
2398 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2399   JVMWrapper("JVM_GetFieldIxModifiers");
2400   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2403 JVM_END
2404 
2405 
2406 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2407   JVMWrapper("JVM_GetMethodIxLocalsCount");
2408   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2411   return method->max_locals();
2412 JVM_END
2413 
2414 
2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2416   JVMWrapper("JVM_GetMethodIxArgsSize");
2417   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2420   return method->size_of_parameters();
2421 JVM_END
2422 
2423 
2424 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2425   JVMWrapper("JVM_GetMethodIxMaxStack");
2426   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429   return method->verifier_max_stack();
2430 JVM_END
2431 
2432 
2433 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2434   JVMWrapper("JVM_IsConstructorIx");
2435   ResourceMark rm(THREAD);
2436   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439   return method->name() == vmSymbols::object_initializer_name();
2440 JVM_END
2441 
2442 
2443 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2444   JVMWrapper("JVM_IsVMGeneratedMethodIx");
2445   ResourceMark rm(THREAD);
2446   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2449   return method->is_overpass();
2450 JVM_END
2451 
2452 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2453   JVMWrapper("JVM_GetMethodIxIxUTF");
2454   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2455   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2456   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2457   return method->name()->as_utf8();
2458 JVM_END
2459 
2460 
2461 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2462   JVMWrapper("JVM_GetMethodIxSignatureUTF");
2463   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2466   return method->signature()->as_utf8();
2467 JVM_END
2468 
2469 /**
2470  * All of these JVM_GetCP-xxx methods are used by the old verifier to
2471  * read entries in the constant pool.  Since the old verifier always
2472  * works on a copy of the code, it will not see any rewriting that
2473  * may possibly occur in the middle of verification.  So it is important
2474  * that nothing it calls tries to use the cpCache instead of the raw
2475  * constant pool, so we must use cp->uncached_x methods when appropriate.
2476  */
2477 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2478   JVMWrapper("JVM_GetCPFieldNameUTF");
2479   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2482   switch (cp->tag_at(cp_index).value()) {
2483     case JVM_CONSTANT_Fieldref:
2484       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2485     default:
2486       fatal("JVM_GetCPFieldNameUTF: illegal constant");
2487   }
2488   ShouldNotReachHere();
2489   return NULL;
2490 JVM_END
2491 
2492 
2493 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2494   JVMWrapper("JVM_GetCPMethodNameUTF");
2495   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2498   switch (cp->tag_at(cp_index).value()) {
2499     case JVM_CONSTANT_InterfaceMethodref:
2500     case JVM_CONSTANT_Methodref:
2501     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2502       return cp->uncached_name_ref_at(cp_index)->as_utf8();
2503     default:
2504       fatal("JVM_GetCPMethodNameUTF: illegal constant");
2505   }
2506   ShouldNotReachHere();
2507   return NULL;
2508 JVM_END
2509 
2510 
2511 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2512   JVMWrapper("JVM_GetCPMethodSignatureUTF");
2513   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516   switch (cp->tag_at(cp_index).value()) {
2517     case JVM_CONSTANT_InterfaceMethodref:
2518     case JVM_CONSTANT_Methodref:
2519     case JVM_CONSTANT_NameAndType:  // for invokedynamic
2520       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2521     default:
2522       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2523   }
2524   ShouldNotReachHere();
2525   return NULL;
2526 JVM_END
2527 
2528 
2529 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2530   JVMWrapper("JVM_GetCPFieldSignatureUTF");
2531   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2534   switch (cp->tag_at(cp_index).value()) {
2535     case JVM_CONSTANT_Fieldref:
2536       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2537     default:
2538       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2539   }
2540   ShouldNotReachHere();
2541   return NULL;
2542 JVM_END
2543 
2544 
2545 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2546   JVMWrapper("JVM_GetCPClassNameUTF");
2547   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2548   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2550   Symbol* classname = cp->klass_name_at(cp_index);
2551   return classname->as_utf8();
2552 JVM_END
2553 
2554 
2555 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556   JVMWrapper("JVM_GetCPFieldClassNameUTF");
2557   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2558   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2559   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2560   switch (cp->tag_at(cp_index).value()) {
2561     case JVM_CONSTANT_Fieldref: {
2562       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2563       Symbol* classname = cp->klass_name_at(class_index);
2564       return classname->as_utf8();
2565     }
2566     default:
2567       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2568   }
2569   ShouldNotReachHere();
2570   return NULL;
2571 JVM_END
2572 
2573 
2574 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2575   JVMWrapper("JVM_GetCPMethodClassNameUTF");
2576   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2577   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2578   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2579   switch (cp->tag_at(cp_index).value()) {
2580     case JVM_CONSTANT_Methodref:
2581     case JVM_CONSTANT_InterfaceMethodref: {
2582       int class_index = cp->uncached_klass_ref_index_at(cp_index);
2583       Symbol* classname = cp->klass_name_at(class_index);
2584       return classname->as_utf8();
2585     }
2586     default:
2587       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2588   }
2589   ShouldNotReachHere();
2590   return NULL;
2591 JVM_END
2592 
2593 
2594 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2595   JVMWrapper("JVM_GetCPFieldModifiers");
2596   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2597   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2598   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2599   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2600   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2601   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2602   switch (cp->tag_at(cp_index).value()) {
2603     case JVM_CONSTANT_Fieldref: {
2604       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2605       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2606       for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2607         if (fs.name() == name && fs.signature() == signature) {
2608           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2609         }
2610       }
2611       return -1;
2612     }
2613     default:
2614       fatal("JVM_GetCPFieldModifiers: illegal constant");
2615   }
2616   ShouldNotReachHere();
2617   return 0;
2618 JVM_END
2619 
2620 
2621 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2622   JVMWrapper("JVM_GetCPMethodModifiers");
2623   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2625   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2627   ConstantPool* cp = InstanceKlass::cast(k)->constants();
2628   switch (cp->tag_at(cp_index).value()) {
2629     case JVM_CONSTANT_Methodref:
2630     case JVM_CONSTANT_InterfaceMethodref: {
2631       Symbol* name      = cp->uncached_name_ref_at(cp_index);
2632       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2633       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2634       int methods_count = methods->length();
2635       for (int i = 0; i < methods_count; i++) {
2636         Method* method = methods->at(i);
2637         if (method->name() == name && method->signature() == signature) {
2638             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2639         }
2640       }
2641       return -1;
2642     }
2643     default:
2644       fatal("JVM_GetCPMethodModifiers: illegal constant");
2645   }
2646   ShouldNotReachHere();
2647   return 0;
2648 JVM_END
2649 
2650 
2651 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2652 
2653 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2654   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2655 JVM_END
2656 
2657 
2658 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2659   JVMWrapper("JVM_IsSameClassPackage");
2660   oop class1_mirror = JNIHandles::resolve_non_null(class1);
2661   oop class2_mirror = JNIHandles::resolve_non_null(class2);
2662   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2663   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2664   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2665 JVM_END
2666 
2667 
2668 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2669 
2670 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2671   JVMWrapper2("JVM_Open (%s)", fname);
2672 
2673   //%note jvm_r6
2674   int result = os::open(fname, flags, mode);
2675   if (result >= 0) {
2676     return result;
2677   } else {
2678     switch(errno) {
2679       case EEXIST:
2680         return JVM_EEXIST;
2681       default:
2682         return -1;
2683     }
2684   }
2685 JVM_END
2686 
2687 
2688 JVM_LEAF(jint, JVM_Close(jint fd))
2689   JVMWrapper2("JVM_Close (0x%x)", fd);
2690   //%note jvm_r6
2691   return os::close(fd);
2692 JVM_END
2693 
2694 
2695 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2696   JVMWrapper2("JVM_Read (0x%x)", fd);
2697 
2698   //%note jvm_r6
2699   return (jint)os::restartable_read(fd, buf, nbytes);
2700 JVM_END
2701 
2702 
2703 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2704   JVMWrapper2("JVM_Write (0x%x)", fd);
2705 
2706   //%note jvm_r6
2707   return (jint)os::write(fd, buf, nbytes);
2708 JVM_END
2709 
2710 
2711 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2712   JVMWrapper2("JVM_Available (0x%x)", fd);
2713   //%note jvm_r6
2714   return os::available(fd, pbytes);
2715 JVM_END
2716 
2717 
2718 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2719   JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2720   //%note jvm_r6
2721   return os::lseek(fd, offset, whence);
2722 JVM_END
2723 
2724 
2725 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2726   JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2727   return os::ftruncate(fd, length);
2728 JVM_END
2729 
2730 
2731 JVM_LEAF(jint, JVM_Sync(jint fd))
2732   JVMWrapper2("JVM_Sync (0x%x)", fd);
2733   //%note jvm_r6
2734   return os::fsync(fd);
2735 JVM_END
2736 
2737 
2738 // Printing support //////////////////////////////////////////////////
2739 extern "C" {
2740 
2741 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2742   // see bug 4399518, 4417214
2743   if ((intptr_t)count <= 0) return -1;
2744   return vsnprintf(str, count, fmt, args);
2745 }
2746 
2747 
2748 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2749   va_list args;
2750   int len;
2751   va_start(args, fmt);
2752   len = jio_vsnprintf(str, count, fmt, args);
2753   va_end(args);
2754   return len;
2755 }
2756 
2757 
2758 int jio_fprintf(FILE* f, const char *fmt, ...) {
2759   int len;
2760   va_list args;
2761   va_start(args, fmt);
2762   len = jio_vfprintf(f, fmt, args);
2763   va_end(args);
2764   return len;
2765 }
2766 
2767 
2768 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2769   if (Arguments::vfprintf_hook() != NULL) {
2770      return Arguments::vfprintf_hook()(f, fmt, args);
2771   } else {
2772     return vfprintf(f, fmt, args);
2773   }
2774 }
2775 
2776 
2777 JNIEXPORT int jio_printf(const char *fmt, ...) {
2778   int len;
2779   va_list args;
2780   va_start(args, fmt);
2781   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2782   va_end(args);
2783   return len;
2784 }
2785 
2786 
2787 // HotSpot specific jio method
2788 void jio_print(const char* s) {
2789   // Try to make this function as atomic as possible.
2790   if (Arguments::vfprintf_hook() != NULL) {
2791     jio_fprintf(defaultStream::output_stream(), "%s", s);
2792   } else {
2793     // Make an unused local variable to avoid warning from gcc 4.x compiler.
2794     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2795   }
2796 }
2797 
2798 } // Extern C
2799 
2800 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2801 
2802 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2803 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2804 // OSThread objects.  The exception to this rule is when the target object is the thread
2805 // doing the operation, in which case we know that the thread won't exit until the
2806 // operation is done (all exits being voluntary).  There are a few cases where it is
2807 // rather silly to do operations on yourself, like resuming yourself or asking whether
2808 // you are alive.  While these can still happen, they are not subject to deadlocks if
2809 // the lock is held while the operation occurs (this is not the case for suspend, for
2810 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
2811 // implementation is local to this file, we always lock Threads_lock for that one.
2812 
2813 static void thread_entry(JavaThread* thread, TRAPS) {
2814   HandleMark hm(THREAD);
2815   Handle obj(THREAD, thread->threadObj());
2816   JavaValue result(T_VOID);
2817   JavaCalls::call_virtual(&result,
2818                           obj,
2819                           KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2820                           vmSymbols::run_method_name(),
2821                           vmSymbols::void_method_signature(),
2822                           THREAD);
2823 }
2824 
2825 
2826 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2827   JVMWrapper("JVM_StartThread");
2828   JavaThread *native_thread = NULL;
2829 
2830   // We cannot hold the Threads_lock when we throw an exception,
2831   // due to rank ordering issues. Example:  we might need to grab the
2832   // Heap_lock while we construct the exception.
2833   bool throw_illegal_thread_state = false;
2834 
2835   // We must release the Threads_lock before we can post a jvmti event
2836   // in Thread::start.
2837   {
2838     // Ensure that the C++ Thread and OSThread structures aren't freed before
2839     // we operate.
2840     MutexLocker mu(Threads_lock);
2841 
2842     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2843     // re-starting an already started thread, so we should usually find
2844     // that the JavaThread is null. However for a JNI attached thread
2845     // there is a small window between the Thread object being created
2846     // (with its JavaThread set) and the update to its threadStatus, so we
2847     // have to check for this
2848     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2849       throw_illegal_thread_state = true;
2850     } else {
2851       // We could also check the stillborn flag to see if this thread was already stopped, but
2852       // for historical reasons we let the thread detect that itself when it starts running
2853 
2854       jlong size =
2855              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2856       // Allocate the C++ Thread structure and create the native thread.  The
2857       // stack size retrieved from java is signed, but the constructor takes
2858       // size_t (an unsigned type), so avoid passing negative values which would
2859       // result in really large stacks.
2860       size_t sz = size > 0 ? (size_t) size : 0;
2861       native_thread = new JavaThread(&thread_entry, sz);
2862 
2863       // At this point it may be possible that no osthread was created for the
2864       // JavaThread due to lack of memory. Check for this situation and throw
2865       // an exception if necessary. Eventually we may want to change this so
2866       // that we only grab the lock if the thread was created successfully -
2867       // then we can also do this check and throw the exception in the
2868       // JavaThread constructor.
2869       if (native_thread->osthread() != NULL) {
2870         // Note: the current thread is not being used within "prepare".
2871         native_thread->prepare(jthread);
2872       }
2873     }
2874   }
2875 
2876   if (throw_illegal_thread_state) {
2877     THROW(vmSymbols::java_lang_IllegalThreadStateException());
2878   }
2879 
2880   assert(native_thread != NULL, "Starting null thread?");
2881 
2882   if (native_thread->osthread() == NULL) {
2883     // No one should hold a reference to the 'native_thread'.
2884     delete native_thread;
2885     if (JvmtiExport::should_post_resource_exhausted()) {
2886       JvmtiExport::post_resource_exhausted(
2887         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2888         "unable to create new native thread");
2889     }
2890     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2891               "unable to create new native thread");
2892   }
2893 
2894   Thread::start(native_thread);
2895 
2896 JVM_END
2897 
2898 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2899 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
2900 // but is thought to be reliable and simple. In the case, where the receiver is the
2901 // same thread as the sender, no safepoint is needed.
2902 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2903   JVMWrapper("JVM_StopThread");
2904 
2905   oop java_throwable = JNIHandles::resolve(throwable);
2906   if (java_throwable == NULL) {
2907     THROW(vmSymbols::java_lang_NullPointerException());
2908   }
2909   oop java_thread = JNIHandles::resolve_non_null(jthread);
2910   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2911   Events::log_exception(JavaThread::current(),
2912                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2913                         receiver, (address)java_thread, throwable);
2914   // First check if thread is alive
2915   if (receiver != NULL) {
2916     // Check if exception is getting thrown at self (use oop equality, since the
2917     // target object might exit)
2918     if (java_thread == thread->threadObj()) {
2919       THROW_OOP(java_throwable);
2920     } else {
2921       // Enques a VM_Operation to stop all threads and then deliver the exception...
2922       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2923     }
2924   }
2925   else {
2926     // Either:
2927     // - target thread has not been started before being stopped, or
2928     // - target thread already terminated
2929     // We could read the threadStatus to determine which case it is
2930     // but that is overkill as it doesn't matter. We must set the
2931     // stillborn flag for the first case, and if the thread has already
2932     // exited setting this flag has no affect
2933     java_lang_Thread::set_stillborn(java_thread);
2934   }
2935 JVM_END
2936 
2937 
2938 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2939   JVMWrapper("JVM_IsThreadAlive");
2940 
2941   oop thread_oop = JNIHandles::resolve_non_null(jthread);
2942   return java_lang_Thread::is_alive(thread_oop);
2943 JVM_END
2944 
2945 
2946 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2947   JVMWrapper("JVM_SuspendThread");
2948   oop java_thread = JNIHandles::resolve_non_null(jthread);
2949   JavaThread* receiver = java_lang_Thread::thread(java_thread);
2950 
2951   if (receiver != NULL) {
2952     // thread has run and has not exited (still on threads list)
2953 
2954     {
2955       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2956       if (receiver->is_external_suspend()) {
2957         // Don't allow nested external suspend requests. We can't return
2958         // an error from this interface so just ignore the problem.
2959         return;
2960       }
2961       if (receiver->is_exiting()) { // thread is in the process of exiting
2962         return;
2963       }
2964       receiver->set_external_suspend();
2965     }
2966 
2967     // java_suspend() will catch threads in the process of exiting
2968     // and will ignore them.
2969     receiver->java_suspend();
2970 
2971     // It would be nice to have the following assertion in all the
2972     // time, but it is possible for a racing resume request to have
2973     // resumed this thread right after we suspended it. Temporarily
2974     // enable this assertion if you are chasing a different kind of
2975     // bug.
2976     //
2977     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2978     //   receiver->is_being_ext_suspended(), "thread is not suspended");
2979   }
2980 JVM_END
2981 
2982 
2983 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2984   JVMWrapper("JVM_ResumeThread");
2985   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2986   // We need to *always* get the threads lock here, since this operation cannot be allowed during
2987   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2988   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2989   // looks at it.
2990   MutexLocker ml(Threads_lock);
2991   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2992   if (thr != NULL) {
2993     // the thread has run and is not in the process of exiting
2994     thr->java_resume();
2995   }
2996 JVM_END
2997 
2998 
2999 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3000   JVMWrapper("JVM_SetThreadPriority");
3001   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3002   MutexLocker ml(Threads_lock);
3003   oop java_thread = JNIHandles::resolve_non_null(jthread);
3004   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3005   JavaThread* thr = java_lang_Thread::thread(java_thread);
3006   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
3007     Thread::set_priority(thr, (ThreadPriority)prio);
3008   }
3009 JVM_END
3010 
3011 
3012 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3013   JVMWrapper("JVM_Yield");
3014   if (os::dont_yield()) return;
3015 #ifndef USDT2
3016   HS_DTRACE_PROBE0(hotspot, thread__yield);
3017 #else /* USDT2 */
3018   HOTSPOT_THREAD_YIELD();
3019 #endif /* USDT2 */
3020   // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3021   // Critical for similar threading behaviour
3022   if (ConvertYieldToSleep) {
3023     os::sleep(thread, MinSleepInterval, false);
3024   } else {
3025     os::yield();
3026   }
3027 JVM_END
3028 
3029 
3030 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3031   JVMWrapper("JVM_Sleep");
3032 
3033   if (millis < 0) {
3034     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3035   }
3036 
3037   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3038     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3039   }
3040 
3041   // Save current thread state and restore it at the end of this block.
3042   // And set new thread state to SLEEPING.
3043   JavaThreadSleepState jtss(thread);
3044 
3045 #ifndef USDT2
3046   HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3047 #else /* USDT2 */
3048   HOTSPOT_THREAD_SLEEP_BEGIN(
3049                              millis);
3050 #endif /* USDT2 */
3051 
3052   EventThreadSleep event;
3053 
3054   if (millis == 0) {
3055     // When ConvertSleepToYield is on, this matches the classic VM implementation of
3056     // JVM_Sleep. Critical for similar threading behaviour (Win32)
3057     // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3058     // for SOLARIS
3059     if (ConvertSleepToYield) {
3060       os::yield();
3061     } else {
3062       ThreadState old_state = thread->osthread()->get_state();
3063       thread->osthread()->set_state(SLEEPING);
3064       os::sleep(thread, MinSleepInterval, false);
3065       thread->osthread()->set_state(old_state);
3066     }
3067   } else {
3068     ThreadState old_state = thread->osthread()->get_state();
3069     thread->osthread()->set_state(SLEEPING);
3070     if (os::sleep(thread, millis, true) == OS_INTRPT) {
3071       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3072       // us while we were sleeping. We do not overwrite those.
3073       if (!HAS_PENDING_EXCEPTION) {
3074         if (event.should_commit()) {
3075           event.set_time(millis);
3076           event.commit();
3077         }
3078 #ifndef USDT2
3079         HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3080 #else /* USDT2 */
3081         HOTSPOT_THREAD_SLEEP_END(
3082                                  1);
3083 #endif /* USDT2 */
3084         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3085         // to properly restore the thread state.  That's likely wrong.
3086         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3087       }
3088     }
3089     thread->osthread()->set_state(old_state);
3090   }
3091   if (event.should_commit()) {
3092     event.set_time(millis);
3093     event.commit();
3094   }
3095 #ifndef USDT2
3096   HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3097 #else /* USDT2 */
3098   HOTSPOT_THREAD_SLEEP_END(
3099                            0);
3100 #endif /* USDT2 */
3101 JVM_END
3102 
3103 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3104   JVMWrapper("JVM_CurrentThread");
3105   oop jthread = thread->threadObj();
3106   assert (thread != NULL, "no current thread!");
3107   return JNIHandles::make_local(env, jthread);
3108 JVM_END
3109 
3110 
3111 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3112   JVMWrapper("JVM_CountStackFrames");
3113 
3114   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3115   oop java_thread = JNIHandles::resolve_non_null(jthread);
3116   bool throw_illegal_thread_state = false;
3117   int count = 0;
3118 
3119   {
3120     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3121     // We need to re-resolve the java_thread, since a GC might have happened during the
3122     // acquire of the lock
3123     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3124 
3125     if (thr == NULL) {
3126       // do nothing
3127     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3128       // Check whether this java thread has been suspended already. If not, throws
3129       // IllegalThreadStateException. We defer to throw that exception until
3130       // Threads_lock is released since loading exception class has to leave VM.
3131       // The correct way to test a thread is actually suspended is
3132       // wait_for_ext_suspend_completion(), but we can't call that while holding
3133       // the Threads_lock. The above tests are sufficient for our purposes
3134       // provided the walkability of the stack is stable - which it isn't
3135       // 100% but close enough for most practical purposes.
3136       throw_illegal_thread_state = true;
3137     } else {
3138       // Count all java activation, i.e., number of vframes
3139       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3140         // Native frames are not counted
3141         if (!vfst.method()->is_native()) count++;
3142        }
3143     }
3144   }
3145 
3146   if (throw_illegal_thread_state) {
3147     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3148                 "this thread is not suspended");
3149   }
3150   return count;
3151 JVM_END
3152 
3153 // Consider: A better way to implement JVM_Interrupt() is to acquire
3154 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3155 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3156 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3157 // outside the critical section.  Threads_lock is hot so we want to minimize
3158 // the hold-time.  A cleaner interface would be to decompose interrupt into
3159 // two steps.  The 1st phase, performed under Threads_lock, would return
3160 // a closure that'd be invoked after Threads_lock was dropped.
3161 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3162 // admit spurious wakeups.
3163 
3164 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3165   JVMWrapper("JVM_Interrupt");
3166 
3167   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3168   oop java_thread = JNIHandles::resolve_non_null(jthread);
3169   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3170   // We need to re-resolve the java_thread, since a GC might have happened during the
3171   // acquire of the lock
3172   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3173   if (thr != NULL) {
3174     Thread::interrupt(thr);
3175   }
3176 JVM_END
3177 
3178 
3179 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3180   JVMWrapper("JVM_IsInterrupted");
3181 
3182   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3183   oop java_thread = JNIHandles::resolve_non_null(jthread);
3184   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3185   // We need to re-resolve the java_thread, since a GC might have happened during the
3186   // acquire of the lock
3187   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3188   if (thr == NULL) {
3189     return JNI_FALSE;
3190   } else {
3191     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3192   }
3193 JVM_END
3194 
3195 
3196 // Return true iff the current thread has locked the object passed in
3197 
3198 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3199   JVMWrapper("JVM_HoldsLock");
3200   assert(THREAD->is_Java_thread(), "sanity check");
3201   if (obj == NULL) {
3202     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3203   }
3204   Handle h_obj(THREAD, JNIHandles::resolve(obj));
3205   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3206 JVM_END
3207 
3208 
3209 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3210   JVMWrapper("JVM_DumpAllStacks");
3211   VM_PrintThreads op;
3212   VMThread::execute(&op);
3213   if (JvmtiExport::should_post_data_dump()) {
3214     JvmtiExport::post_data_dump();
3215   }
3216 JVM_END
3217 
3218 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3219   JVMWrapper("JVM_SetNativeThreadName");
3220   ResourceMark rm(THREAD);
3221   oop java_thread = JNIHandles::resolve_non_null(jthread);
3222   JavaThread* thr = java_lang_Thread::thread(java_thread);
3223   // Thread naming only supported for the current thread, doesn't work for
3224   // target threads.
3225   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3226     // we don't set the name of an attached thread to avoid stepping
3227     // on other programs
3228     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3229     os::set_native_thread_name(thread_name);
3230   }
3231 JVM_END
3232 
3233 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3234 
3235 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3236   assert(jthread->is_Java_thread(), "must be a Java thread");
3237   if (jthread->privileged_stack_top() == NULL) return false;
3238   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3239     oop loader = jthread->privileged_stack_top()->class_loader();
3240     if (loader == NULL) return true;
3241     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3242     if (trusted) return true;
3243   }
3244   return false;
3245 }
3246 
3247 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3248   JVMWrapper("JVM_CurrentLoadedClass");
3249   ResourceMark rm(THREAD);
3250 
3251   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3252     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3253     bool trusted = is_trusted_frame(thread, &vfst);
3254     if (trusted) return NULL;
3255 
3256     Method* m = vfst.method();
3257     if (!m->is_native()) {
3258       InstanceKlass* holder = m->method_holder();
3259       oop loader = holder->class_loader();
3260       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3261         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3262       }
3263     }
3264   }
3265   return NULL;
3266 JVM_END
3267 
3268 
3269 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3270   JVMWrapper("JVM_CurrentClassLoader");
3271   ResourceMark rm(THREAD);
3272 
3273   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3274 
3275     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3276     bool trusted = is_trusted_frame(thread, &vfst);
3277     if (trusted) return NULL;
3278 
3279     Method* m = vfst.method();
3280     if (!m->is_native()) {
3281       InstanceKlass* holder = m->method_holder();
3282       assert(holder->is_klass(), "just checking");
3283       oop loader = holder->class_loader();
3284       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3285         return JNIHandles::make_local(env, loader);
3286       }
3287     }
3288   }
3289   return NULL;
3290 JVM_END
3291 
3292 
3293 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3294   JVMWrapper("JVM_GetClassContext");
3295   ResourceMark rm(THREAD);
3296   JvmtiVMObjectAllocEventCollector oam;
3297   vframeStream vfst(thread);
3298 
3299   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3300     // This must only be called from SecurityManager.getClassContext
3301     Method* m = vfst.method();
3302     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3303           m->name()          == vmSymbols::getClassContext_name() &&
3304           m->signature()     == vmSymbols::void_class_array_signature())) {
3305       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3306     }
3307   }
3308 
3309   // Collect method holders
3310   GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3311   for (; !vfst.at_end(); vfst.security_next()) {
3312     Method* m = vfst.method();
3313     // Native frames are not returned
3314     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3315       Klass* holder = m->method_holder();
3316       assert(holder->is_klass(), "just checking");
3317       klass_array->append(holder);
3318     }
3319   }
3320 
3321   // Create result array of type [Ljava/lang/Class;
3322   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3323   // Fill in mirrors corresponding to method holders
3324   for (int i = 0; i < klass_array->length(); i++) {
3325     result->obj_at_put(i, klass_array->at(i)->java_mirror());
3326   }
3327 
3328   return (jobjectArray) JNIHandles::make_local(env, result);
3329 JVM_END
3330 
3331 
3332 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3333   JVMWrapper("JVM_ClassDepth");
3334   ResourceMark rm(THREAD);
3335   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3336   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3337 
3338   const char* str = java_lang_String::as_utf8_string(class_name_str());
3339   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3340   if (class_name_sym == NULL) {
3341     return -1;
3342   }
3343 
3344   int depth = 0;
3345 
3346   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3347     if (!vfst.method()->is_native()) {
3348       InstanceKlass* holder = vfst.method()->method_holder();
3349       assert(holder->is_klass(), "just checking");
3350       if (holder->name() == class_name_sym) {
3351         return depth;
3352       }
3353       depth++;
3354     }
3355   }
3356   return -1;
3357 JVM_END
3358 
3359 
3360 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3361   JVMWrapper("JVM_ClassLoaderDepth");
3362   ResourceMark rm(THREAD);
3363   int depth = 0;
3364   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3365     // if a method in a class in a trusted loader is in a doPrivileged, return -1
3366     bool trusted = is_trusted_frame(thread, &vfst);
3367     if (trusted) return -1;
3368 
3369     Method* m = vfst.method();
3370     if (!m->is_native()) {
3371       InstanceKlass* holder = m->method_holder();
3372       assert(holder->is_klass(), "just checking");
3373       oop loader = holder->class_loader();
3374       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3375         return depth;
3376       }
3377       depth++;
3378     }
3379   }
3380   return -1;
3381 JVM_END
3382 
3383 
3384 // java.lang.Package ////////////////////////////////////////////////////////////////
3385 
3386 
3387 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3388   JVMWrapper("JVM_GetSystemPackage");
3389   ResourceMark rm(THREAD);
3390   JvmtiVMObjectAllocEventCollector oam;
3391   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3392   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3393   return (jstring) JNIHandles::make_local(result);
3394 JVM_END
3395 
3396 
3397 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3398   JVMWrapper("JVM_GetSystemPackages");
3399   JvmtiVMObjectAllocEventCollector oam;
3400   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3401   return (jobjectArray) JNIHandles::make_local(result);
3402 JVM_END
3403 
3404 
3405 // ObjectInputStream ///////////////////////////////////////////////////////////////
3406 
3407 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3408   if (current_class == NULL) {
3409     return true;
3410   }
3411   if ((current_class == field_class) || access.is_public()) {
3412     return true;
3413   }
3414 
3415   if (access.is_protected()) {
3416     // See if current_class is a subclass of field_class
3417     if (current_class->is_subclass_of(field_class)) {
3418       return true;
3419     }
3420   }
3421 
3422   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3423 }
3424 
3425 
3426 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3427 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3428   JVMWrapper("JVM_AllocateNewObject");
3429   JvmtiVMObjectAllocEventCollector oam;
3430   // Receiver is not used
3431   oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3432   oop init_mirror = JNIHandles::resolve_non_null(initClass);
3433 
3434   // Cannot instantiate primitive types
3435   if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3436     ResourceMark rm(THREAD);
3437     THROW_0(vmSymbols::java_lang_InvalidClassException());
3438   }
3439 
3440   // Arrays not allowed here, must use JVM_AllocateNewArray
3441   if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3442       java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3443     ResourceMark rm(THREAD);
3444     THROW_0(vmSymbols::java_lang_InvalidClassException());
3445   }
3446 
3447   instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3448   instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3449 
3450   assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3451 
3452   // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3453   curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3454 
3455   // Make sure klass is initialized, since we are about to instantiate one of them.
3456   curr_klass->initialize(CHECK_NULL);
3457 
3458  methodHandle m (THREAD,
3459                  init_klass->find_method(vmSymbols::object_initializer_name(),
3460                                          vmSymbols::void_method_signature()));
3461   if (m.is_null()) {
3462     ResourceMark rm(THREAD);
3463     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3464                 Method::name_and_sig_as_C_string(init_klass(),
3465                                           vmSymbols::object_initializer_name(),
3466                                           vmSymbols::void_method_signature()));
3467   }
3468 
3469   if (curr_klass ==  init_klass && !m->is_public()) {
3470     // Calling the constructor for class 'curr_klass'.
3471     // Only allow calls to a public no-arg constructor.
3472     // This path corresponds to creating an Externalizable object.
3473     THROW_0(vmSymbols::java_lang_IllegalAccessException());
3474   }
3475 
3476   if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3477     // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3478     THROW_0(vmSymbols::java_lang_IllegalAccessException());
3479   }
3480 
3481   Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3482   // Call constructor m. This might call a constructor higher up in the hierachy
3483   JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3484 
3485   return JNIHandles::make_local(obj());
3486 JVM_END
3487 
3488 
3489 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3490   JVMWrapper("JVM_AllocateNewArray");
3491   JvmtiVMObjectAllocEventCollector oam;
3492   oop mirror = JNIHandles::resolve_non_null(currClass);
3493 
3494   if (java_lang_Class::is_primitive(mirror)) {
3495     THROW_0(vmSymbols::java_lang_InvalidClassException());
3496   }
3497   Klass* k = java_lang_Class::as_Klass(mirror);
3498   oop result;
3499 
3500   if (k->oop_is_typeArray()) {
3501     // typeArray
3502     result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3503   } else if (k->oop_is_objArray()) {
3504     // objArray
3505     ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3506     oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3507     result = oak->allocate(length, CHECK_NULL);
3508   } else {
3509     THROW_0(vmSymbols::java_lang_InvalidClassException());
3510   }
3511   return JNIHandles::make_local(env, result);
3512 JVM_END
3513 
3514 
3515 // Return the first non-null class loader up the execution stack, or null
3516 // if only code from the null class loader is on the stack.
3517 
3518 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3519   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3520     // UseNewReflection
3521     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3522     oop loader = vfst.method()->method_holder()->class_loader();
3523     if (loader != NULL) {
3524       return JNIHandles::make_local(env, loader);
3525     }
3526   }
3527   return NULL;
3528 JVM_END
3529 
3530 
3531 // Load a class relative to the most recent class on the stack  with a non-null
3532 // classloader.
3533 // This function has been deprecated and should not be considered part of the
3534 // specified JVM interface.
3535 
3536 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3537                                  jclass currClass, jstring currClassName))
3538   JVMWrapper("JVM_LoadClass0");
3539   // Receiver is not used
3540   ResourceMark rm(THREAD);
3541 
3542   // Class name argument is not guaranteed to be in internal format
3543   Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3544   Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3545 
3546   const char* str = java_lang_String::as_utf8_string(string());
3547 
3548   if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3549     // It's impossible to create this class;  the name cannot fit
3550     // into the constant pool.
3551     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3552   }
3553 
3554   TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3555   Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3556   // Find the most recent class on the stack with a non-null classloader
3557   oop loader = NULL;
3558   oop protection_domain = NULL;
3559   if (curr_klass.is_null()) {
3560     for (vframeStream vfst(thread);
3561          !vfst.at_end() && loader == NULL;
3562          vfst.next()) {
3563       if (!vfst.method()->is_native()) {
3564         InstanceKlass* holder = vfst.method()->method_holder();
3565         loader             = holder->class_loader();
3566         protection_domain  = holder->protection_domain();
3567       }
3568     }
3569   } else {
3570     Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3571     loader            = InstanceKlass::cast(curr_klass_oop)->class_loader();
3572     protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3573   }
3574   Handle h_loader(THREAD, loader);
3575   Handle h_prot  (THREAD, protection_domain);
3576   jclass result =  find_class_from_class_loader(env, name, true, h_loader, h_prot,
3577                                                 false, thread);
3578   if (TraceClassResolution && result != NULL) {
3579     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3580   }
3581   return result;
3582 JVM_END
3583 
3584 
3585 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3586 
3587 
3588 // resolve array handle and check arguments
3589 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3590   if (arr == NULL) {
3591     THROW_0(vmSymbols::java_lang_NullPointerException());
3592   }
3593   oop a = JNIHandles::resolve_non_null(arr);
3594   if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3595     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3596   }
3597   return arrayOop(a);
3598 }
3599 
3600 
3601 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3602   JVMWrapper("JVM_GetArrayLength");
3603   arrayOop a = check_array(env, arr, false, CHECK_0);
3604   return a->length();
3605 JVM_END
3606 
3607 
3608 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3609   JVMWrapper("JVM_Array_Get");
3610   JvmtiVMObjectAllocEventCollector oam;
3611   arrayOop a = check_array(env, arr, false, CHECK_NULL);
3612   jvalue value;
3613   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3614   oop box = Reflection::box(&value, type, CHECK_NULL);
3615   return JNIHandles::make_local(env, box);
3616 JVM_END
3617 
3618 
3619 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3620   JVMWrapper("JVM_GetPrimitiveArrayElement");
3621   jvalue value;
3622   value.i = 0; // to initialize value before getting used in CHECK
3623   arrayOop a = check_array(env, arr, true, CHECK_(value));
3624   assert(a->is_typeArray(), "just checking");
3625   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3626   BasicType wide_type = (BasicType) wCode;
3627   if (type != wide_type) {
3628     Reflection::widen(&value, type, wide_type, CHECK_(value));
3629   }
3630   return value;
3631 JVM_END
3632 
3633 
3634 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3635   JVMWrapper("JVM_SetArrayElement");
3636   arrayOop a = check_array(env, arr, false, CHECK);
3637   oop box = JNIHandles::resolve(val);
3638   jvalue value;
3639   value.i = 0; // to initialize value before getting used in CHECK
3640   BasicType value_type;
3641   if (a->is_objArray()) {
3642     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3643     value_type = Reflection::unbox_for_regular_object(box, &value);
3644   } else {
3645     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3646   }
3647   Reflection::array_set(&value, a, index, value_type, CHECK);
3648 JVM_END
3649 
3650 
3651 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3652   JVMWrapper("JVM_SetPrimitiveArrayElement");
3653   arrayOop a = check_array(env, arr, true, CHECK);
3654   assert(a->is_typeArray(), "just checking");
3655   BasicType value_type = (BasicType) vCode;
3656   Reflection::array_set(&v, a, index, value_type, CHECK);
3657 JVM_END
3658 
3659 
3660 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3661   JVMWrapper("JVM_NewArray");
3662   JvmtiVMObjectAllocEventCollector oam;
3663   oop element_mirror = JNIHandles::resolve(eltClass);
3664   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3665   return JNIHandles::make_local(env, result);
3666 JVM_END
3667 
3668 
3669 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3670   JVMWrapper("JVM_NewMultiArray");
3671   JvmtiVMObjectAllocEventCollector oam;
3672   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3673   oop element_mirror = JNIHandles::resolve(eltClass);
3674   assert(dim_array->is_typeArray(), "just checking");
3675   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3676   return JNIHandles::make_local(env, result);
3677 JVM_END
3678 
3679 
3680 // Networking library support ////////////////////////////////////////////////////////////////////
3681 
3682 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3683   JVMWrapper("JVM_InitializeSocketLibrary");
3684   return 0;
3685 JVM_END
3686 
3687 
3688 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3689   JVMWrapper("JVM_Socket");
3690   return os::socket(domain, type, protocol);
3691 JVM_END
3692 
3693 
3694 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3695   JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3696   //%note jvm_r6
3697   return os::socket_close(fd);
3698 JVM_END
3699 
3700 
3701 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3702   JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3703   //%note jvm_r6
3704   return os::socket_shutdown(fd, howto);
3705 JVM_END
3706 
3707 
3708 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3709   JVMWrapper2("JVM_Recv (0x%x)", fd);
3710   //%note jvm_r6
3711   return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3712 JVM_END
3713 
3714 
3715 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3716   JVMWrapper2("JVM_Send (0x%x)", fd);
3717   //%note jvm_r6
3718   return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3719 JVM_END
3720 
3721 
3722 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3723   JVMWrapper2("JVM_Timeout (0x%x)", fd);
3724   //%note jvm_r6
3725   return os::timeout(fd, timeout);
3726 JVM_END
3727 
3728 
3729 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3730   JVMWrapper2("JVM_Listen (0x%x)", fd);
3731   //%note jvm_r6
3732   return os::listen(fd, count);
3733 JVM_END
3734 
3735 
3736 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3737   JVMWrapper2("JVM_Connect (0x%x)", fd);
3738   //%note jvm_r6
3739   return os::connect(fd, him, (socklen_t)len);
3740 JVM_END
3741 
3742 
3743 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3744   JVMWrapper2("JVM_Bind (0x%x)", fd);
3745   //%note jvm_r6
3746   return os::bind(fd, him, (socklen_t)len);
3747 JVM_END
3748 
3749 
3750 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3751   JVMWrapper2("JVM_Accept (0x%x)", fd);
3752   //%note jvm_r6
3753   socklen_t socklen = (socklen_t)(*len);
3754   jint result = os::accept(fd, him, &socklen);
3755   *len = (jint)socklen;
3756   return result;
3757 JVM_END
3758 
3759 
3760 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3761   JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3762   //%note jvm_r6
3763   socklen_t socklen = (socklen_t)(*fromlen);
3764   jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3765   *fromlen = (int)socklen;
3766   return result;
3767 JVM_END
3768 
3769 
3770 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3771   JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3772   //%note jvm_r6
3773   socklen_t socklen = (socklen_t)(*len);
3774   jint result = os::get_sock_name(fd, him, &socklen);
3775   *len = (int)socklen;
3776   return result;
3777 JVM_END
3778 
3779 
3780 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3781   JVMWrapper2("JVM_SendTo (0x%x)", fd);
3782   //%note jvm_r6
3783   return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3784 JVM_END
3785 
3786 
3787 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3788   JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3789   //%note jvm_r6
3790   return os::socket_available(fd, pbytes);
3791 JVM_END
3792 
3793 
3794 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3795   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3796   //%note jvm_r6
3797   socklen_t socklen = (socklen_t)(*optlen);
3798   jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3799   *optlen = (int)socklen;
3800   return result;
3801 JVM_END
3802 
3803 
3804 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3805   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3806   //%note jvm_r6
3807   return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3808 JVM_END
3809 
3810 
3811 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3812   JVMWrapper("JVM_GetHostName");
3813   return os::get_host_name(name, namelen);
3814 JVM_END
3815 
3816 
3817 // Library support ///////////////////////////////////////////////////////////////////////////
3818 
3819 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3820   //%note jvm_ct
3821   JVMWrapper2("JVM_LoadLibrary (%s)", name);
3822   char ebuf[1024];
3823   void *load_result;
3824   {
3825     ThreadToNativeFromVM ttnfvm(thread);
3826     load_result = os::dll_load(name, ebuf, sizeof ebuf);
3827   }
3828   if (load_result == NULL) {
3829     char msg[1024];
3830     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3831     // Since 'ebuf' may contain a string encoded using
3832     // platform encoding scheme, we need to pass
3833     // Exceptions::unsafe_to_utf8 to the new_exception method
3834     // as the last argument. See bug 6367357.
3835     Handle h_exception =
3836       Exceptions::new_exception(thread,
3837                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
3838                                 msg, Exceptions::unsafe_to_utf8);
3839 
3840     THROW_HANDLE_0(h_exception);
3841   }
3842   return load_result;
3843 JVM_END
3844 
3845 
3846 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3847   JVMWrapper("JVM_UnloadLibrary");
3848   os::dll_unload(handle);
3849 JVM_END
3850 
3851 
3852 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3853   JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3854   return os::dll_lookup(handle, name);
3855 JVM_END
3856 
3857 
3858 // Floating point support ////////////////////////////////////////////////////////////////////
3859 
3860 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3861   JVMWrapper("JVM_IsNaN");
3862   return g_isnan(a);
3863 JVM_END
3864 
3865 
3866 // JNI version ///////////////////////////////////////////////////////////////////////////////
3867 
3868 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3869   JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3870   return Threads::is_supported_jni_version_including_1_1(version);
3871 JVM_END
3872 
3873 
3874 // String support ///////////////////////////////////////////////////////////////////////////
3875 
3876 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3877   JVMWrapper("JVM_InternString");
3878   JvmtiVMObjectAllocEventCollector oam;
3879   if (str == NULL) return NULL;
3880   oop string = JNIHandles::resolve_non_null(str);
3881   oop result = StringTable::intern(string, CHECK_NULL);
3882   return (jstring) JNIHandles::make_local(env, result);
3883 JVM_END
3884 
3885 
3886 // Raw monitor support //////////////////////////////////////////////////////////////////////
3887 
3888 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3889 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3890 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3891 // that only works with java threads.
3892 
3893 
3894 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3895   VM_Exit::block_if_vm_exited();
3896   JVMWrapper("JVM_RawMonitorCreate");
3897   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3898 }
3899 
3900 
3901 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
3902   VM_Exit::block_if_vm_exited();
3903   JVMWrapper("JVM_RawMonitorDestroy");
3904   delete ((Mutex*) mon);
3905 }
3906 
3907 
3908 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3909   VM_Exit::block_if_vm_exited();
3910   JVMWrapper("JVM_RawMonitorEnter");
3911   ((Mutex*) mon)->jvm_raw_lock();
3912   return 0;
3913 }
3914 
3915 
3916 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3917   VM_Exit::block_if_vm_exited();
3918   JVMWrapper("JVM_RawMonitorExit");
3919   ((Mutex*) mon)->jvm_raw_unlock();
3920 }
3921 
3922 
3923 // Support for Serialization
3924 
3925 typedef jfloat  (JNICALL *IntBitsToFloatFn  )(JNIEnv* env, jclass cb, jint    value);
3926 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong   value);
3927 typedef jint    (JNICALL *FloatToIntBitsFn  )(JNIEnv* env, jclass cb, jfloat  value);
3928 typedef jlong   (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3929 
3930 static IntBitsToFloatFn   int_bits_to_float_fn   = NULL;
3931 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3932 static FloatToIntBitsFn   float_to_int_bits_fn   = NULL;
3933 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3934 
3935 
3936 void initialize_converter_functions() {
3937   if (JDK_Version::is_gte_jdk14x_version()) {
3938     // These functions only exist for compatibility with 1.3.1 and earlier
3939     return;
3940   }
3941 
3942   // called from universe_post_init()
3943   assert(
3944     int_bits_to_float_fn   == NULL &&
3945     long_bits_to_double_fn == NULL &&
3946     float_to_int_bits_fn   == NULL &&
3947     double_to_long_bits_fn == NULL ,
3948     "initialization done twice"
3949   );
3950   // initialize
3951   int_bits_to_float_fn   = CAST_TO_FN_PTR(IntBitsToFloatFn  , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat"  , "(I)F"));
3952   long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3953   float_to_int_bits_fn   = CAST_TO_FN_PTR(FloatToIntBitsFn  , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits"  , "(F)I"));
3954   double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3955   // verify
3956   assert(
3957     int_bits_to_float_fn   != NULL &&
3958     long_bits_to_double_fn != NULL &&
3959     float_to_int_bits_fn   != NULL &&
3960     double_to_long_bits_fn != NULL ,
3961     "initialization failed"
3962   );
3963 }
3964 
3965 
3966 // Serialization
3967 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3968                                             jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3969   assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3970 
3971   typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3972   typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
3973   typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
3974   oop          o      = JNIHandles::resolve(obj);
3975 
3976   if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
3977     THROW(vmSymbols::java_lang_NullPointerException());
3978   }
3979 
3980   jsize nfids = fids->length();
3981   if (nfids == 0) return;
3982 
3983   if (tcodes->length() < nfids) {
3984     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3985   }
3986 
3987   jsize off = 0;
3988   /* loop through fields, setting values */
3989   for (jsize i = 0; i < nfids; i++) {
3990     jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3991     int field_offset;
3992     if (fid != NULL) {
3993       // NULL is a legal value for fid, but retrieving the field offset
3994       // trigger assertion in that case
3995       field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3996     }
3997 
3998     switch (tcodes->char_at(i)) {
3999       case 'Z':
4000         if (fid != NULL) {
4001           jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
4002           o->bool_field_put(field_offset, val);
4003         }
4004         off++;
4005         break;
4006 
4007       case 'B':
4008         if (fid != NULL) {
4009           o->byte_field_put(field_offset, dbuf->byte_at(off));
4010         }
4011         off++;
4012         break;
4013 
4014       case 'C':
4015         if (fid != NULL) {
4016           jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4017                     + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4018           o->char_field_put(field_offset, val);
4019         }
4020         off += 2;
4021         break;
4022 
4023       case 'S':
4024         if (fid != NULL) {
4025           jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4026                      + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4027           o->short_field_put(field_offset, val);
4028         }
4029         off += 2;
4030         break;
4031 
4032       case 'I':
4033         if (fid != NULL) {
4034           jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4035                     + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4036                     + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4037                     + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4038           o->int_field_put(field_offset, ival);
4039         }
4040         off += 4;
4041         break;
4042 
4043       case 'F':
4044         if (fid != NULL) {
4045           jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4046                     + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4047                     + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4048                     + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4049           jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4050           o->float_field_put(field_offset, fval);
4051         }
4052         off += 4;
4053         break;
4054 
4055       case 'J':
4056         if (fid != NULL) {
4057           jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4058                      + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4059                      + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4060                      + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4061                      + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4062                      + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4063                      + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4064                      + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4065           o->long_field_put(field_offset, lval);
4066         }
4067         off += 8;
4068         break;
4069 
4070       case 'D':
4071         if (fid != NULL) {
4072           jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4073                      + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4074                      + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4075                      + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4076                      + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4077                      + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4078                      + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4079                      + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4080           jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4081           o->double_field_put(field_offset, dval);
4082         }
4083         off += 8;
4084         break;
4085 
4086       default:
4087         // Illegal typecode
4088         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4089     }
4090   }
4091 JVM_END
4092 
4093 
4094 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4095                             jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4096   assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4097 
4098   typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4099   typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
4100   typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
4101   oop          o      = JNIHandles::resolve(obj);
4102 
4103   if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
4104     THROW(vmSymbols::java_lang_NullPointerException());
4105   }
4106 
4107   jsize nfids = fids->length();
4108   if (nfids == 0) return;
4109 
4110   if (tcodes->length() < nfids) {
4111     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4112   }
4113 
4114   /* loop through fields, fetching values */
4115   jsize off = 0;
4116   for (jsize i = 0; i < nfids; i++) {
4117     jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4118     if (fid == NULL) {
4119       THROW(vmSymbols::java_lang_NullPointerException());
4120     }
4121     int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4122 
4123      switch (tcodes->char_at(i)) {
4124        case 'Z':
4125          {
4126            jboolean val = o->bool_field(field_offset);
4127            dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4128          }
4129          break;
4130 
4131        case 'B':
4132          dbuf->byte_at_put(off++, o->byte_field(field_offset));
4133          break;
4134 
4135        case 'C':
4136          {
4137            jchar val = o->char_field(field_offset);
4138            dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4139            dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4140          }
4141          break;
4142 
4143        case 'S':
4144          {
4145            jshort val = o->short_field(field_offset);
4146            dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4147            dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4148          }
4149          break;
4150 
4151        case 'I':
4152          {
4153            jint val = o->int_field(field_offset);
4154            dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4155            dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4156            dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
4157            dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
4158          }
4159          break;
4160 
4161        case 'F':
4162          {
4163            jfloat fval = o->float_field(field_offset);
4164            jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4165            dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4166            dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4167            dbuf->byte_at_put(off++, (ival >> 8)  & 0xFF);
4168            dbuf->byte_at_put(off++, (ival >> 0)  & 0xFF);
4169          }
4170          break;
4171 
4172        case 'J':
4173          {
4174            jlong val = o->long_field(field_offset);
4175            dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4176            dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4177            dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4178            dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4179            dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4180            dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4181            dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
4182            dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
4183          }
4184          break;
4185 
4186        case 'D':
4187          {
4188            jdouble dval = o->double_field(field_offset);
4189            jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4190            dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4191            dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4192            dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4193            dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4194            dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4195            dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4196            dbuf->byte_at_put(off++, (lval >> 8)  & 0xFF);
4197            dbuf->byte_at_put(off++, (lval >> 0)  & 0xFF);
4198          }
4199          break;
4200 
4201        default:
4202          // Illegal typecode
4203          THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4204      }
4205   }
4206 JVM_END
4207 
4208 
4209 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4210 
4211 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4212   // Security Note:
4213   //   The Java level wrapper will perform the necessary security check allowing
4214   //   us to pass the NULL as the initiating class loader.
4215   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4216 
4217   KlassHandle klass_handle(THREAD, klass);
4218   // Check if we should initialize the class
4219   if (init && klass_handle->oop_is_instance()) {
4220     klass_handle->initialize(CHECK_NULL);
4221   }
4222   return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4223 }
4224 
4225 
4226 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4227 
4228 #ifndef PRODUCT
4229 
4230 extern "C" {
4231   JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4232   JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4233   JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4234 }
4235 
4236 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4237   JVMWrapper("JVM_AccessBoolVMFlag");
4238   return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4239 JVM_END
4240 
4241 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4242   JVMWrapper("JVM_AccessVMIntFlag");
4243   intx v;
4244   jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4245   *value = (jint)v;
4246   return result;
4247 JVM_END
4248 
4249 
4250 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4251   JVMWrapper("JVM_VMBreakPoint");
4252   oop the_obj = JNIHandles::resolve(obj);
4253   BREAKPOINT;
4254 JVM_END
4255 
4256 
4257 #endif
4258 
4259 
4260 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4261 
4262 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4263   JVMWrapper("JVM_InvokeMethod");
4264   Handle method_handle;
4265   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4266     method_handle = Handle(THREAD, JNIHandles::resolve(method));
4267     Handle receiver(THREAD, JNIHandles::resolve(obj));
4268     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4269     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4270     jobject res = JNIHandles::make_local(env, result);
4271     if (JvmtiExport::should_post_vm_object_alloc()) {
4272       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4273       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4274       if (java_lang_Class::is_primitive(ret_type)) {
4275         // Only for primitive type vm allocates memory for java object.
4276         // See box() method.
4277         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4278       }
4279     }
4280     return res;
4281   } else {
4282     THROW_0(vmSymbols::java_lang_StackOverflowError());
4283   }
4284 JVM_END
4285 
4286 
4287 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4288   JVMWrapper("JVM_NewInstanceFromConstructor");
4289   oop constructor_mirror = JNIHandles::resolve(c);
4290   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4291   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4292   jobject res = JNIHandles::make_local(env, result);
4293   if (JvmtiExport::should_post_vm_object_alloc()) {
4294     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4295   }
4296   return res;
4297 JVM_END
4298 
4299 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4300 
4301 JVM_LEAF(jboolean, JVM_SupportsCX8())
4302   JVMWrapper("JVM_SupportsCX8");
4303   return VM_Version::supports_cx8();
4304 JVM_END
4305 
4306 
4307 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4308   JVMWrapper("JVM_CX8Field");
4309   jlong res;
4310   oop             o       = JNIHandles::resolve(obj);
4311   intptr_t        fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4312   volatile jlong* addr    = (volatile jlong*)((address)o + fldOffs);
4313 
4314   assert(VM_Version::supports_cx8(), "cx8 not supported");
4315   res = Atomic::cmpxchg(newVal, addr, oldVal);
4316 
4317   return res == oldVal;
4318 JVM_END
4319 
4320 // DTrace ///////////////////////////////////////////////////////////////////
4321 
4322 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4323   JVMWrapper("JVM_DTraceGetVersion");
4324   return (jint)JVM_TRACING_DTRACE_VERSION;
4325 JVM_END
4326 
4327 JVM_ENTRY(jlong,JVM_DTraceActivate(
4328     JNIEnv* env, jint version, jstring module_name, jint providers_count,
4329     JVM_DTraceProvider* providers))
4330   JVMWrapper("JVM_DTraceActivate");
4331   return DTraceJSDT::activate(
4332     version, module_name, providers_count, providers, CHECK_0);
4333 JVM_END
4334 
4335 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4336   JVMWrapper("JVM_DTraceIsProbeEnabled");
4337   return DTraceJSDT::is_probe_enabled(method);
4338 JVM_END
4339 
4340 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4341   JVMWrapper("JVM_DTraceDispose");
4342   DTraceJSDT::dispose(handle);
4343 JVM_END
4344 
4345 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4346   JVMWrapper("JVM_DTraceIsSupported");
4347   return DTraceJSDT::is_supported();
4348 JVM_END
4349 
4350 // Returns an array of all live Thread objects (VM internal JavaThreads,
4351 // jvmti agent threads, and JNI attaching threads  are skipped)
4352 // See CR 6404306 regarding JNI attaching threads
4353 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4354   ResourceMark rm(THREAD);
4355   ThreadsListEnumerator tle(THREAD, false, false);
4356   JvmtiVMObjectAllocEventCollector oam;
4357 
4358   int num_threads = tle.num_threads();
4359   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4360   objArrayHandle threads_ah(THREAD, r);
4361 
4362   for (int i = 0; i < num_threads; i++) {
4363     Handle h = tle.get_threadObj(i);
4364     threads_ah->obj_at_put(i, h());
4365   }
4366 
4367   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4368 JVM_END
4369 
4370 
4371 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4372 // Return StackTraceElement[][], each element is the stack trace of a thread in
4373 // the corresponding entry in the given threads array
4374 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4375   JVMWrapper("JVM_DumpThreads");
4376   JvmtiVMObjectAllocEventCollector oam;
4377 
4378   // Check if threads is null
4379   if (threads == NULL) {
4380     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4381   }
4382 
4383   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4384   objArrayHandle ah(THREAD, a);
4385   int num_threads = ah->length();
4386   // check if threads is non-empty array
4387   if (num_threads == 0) {
4388     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4389   }
4390 
4391   // check if threads is not an array of objects of Thread class
4392   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4393   if (k != SystemDictionary::Thread_klass()) {
4394     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4395   }
4396 
4397   ResourceMark rm(THREAD);
4398 
4399   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4400   for (int i = 0; i < num_threads; i++) {
4401     oop thread_obj = ah->obj_at(i);
4402     instanceHandle h(THREAD, (instanceOop) thread_obj);
4403     thread_handle_array->append(h);
4404   }
4405 
4406   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4407   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4408 
4409 JVM_END
4410 
4411 // JVM monitoring and management support
4412 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4413   return Management::get_jmm_interface(version);
4414 JVM_END
4415 
4416 // com.sun.tools.attach.VirtualMachine agent properties support
4417 //
4418 // Initialize the agent properties with the properties maintained in the VM
4419 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4420   JVMWrapper("JVM_InitAgentProperties");
4421   ResourceMark rm;
4422 
4423   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4424 
4425   PUTPROP(props, "sun.java.command", Arguments::java_command());
4426   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4427   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4428   return properties;
4429 JVM_END
4430 
4431 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4432 {
4433   JVMWrapper("JVM_GetEnclosingMethodInfo");
4434   JvmtiVMObjectAllocEventCollector oam;
4435 
4436   if (ofClass == NULL) {
4437     return NULL;
4438   }
4439   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4440   // Special handling for primitive objects
4441   if (java_lang_Class::is_primitive(mirror())) {
4442     return NULL;
4443   }
4444   Klass* k = java_lang_Class::as_Klass(mirror());
4445   if (!k->oop_is_instance()) {
4446     return NULL;
4447   }
4448   instanceKlassHandle ik_h(THREAD, k);
4449   int encl_method_class_idx = ik_h->enclosing_method_class_index();
4450   if (encl_method_class_idx == 0) {
4451     return NULL;
4452   }
4453   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4454   objArrayHandle dest(THREAD, dest_o);
4455   Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4456   dest->obj_at_put(0, enc_k->java_mirror());
4457   int encl_method_method_idx = ik_h->enclosing_method_method_index();
4458   if (encl_method_method_idx != 0) {
4459     Symbol* sym = ik_h->constants()->symbol_at(
4460                         extract_low_short_from_int(
4461                           ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4462     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4463     dest->obj_at_put(1, str());
4464     sym = ik_h->constants()->symbol_at(
4465               extract_high_short_from_int(
4466                 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4467     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4468     dest->obj_at_put(2, str());
4469   }
4470   return (jobjectArray) JNIHandles::make_local(dest());
4471 }
4472 JVM_END
4473 
4474 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4475                                               jint javaThreadState))
4476 {
4477   // If new thread states are added in future JDK and VM versions,
4478   // this should check if the JDK version is compatible with thread
4479   // states supported by the VM.  Return NULL if not compatible.
4480   //
4481   // This function must map the VM java_lang_Thread::ThreadStatus
4482   // to the Java thread state that the JDK supports.
4483   //
4484 
4485   typeArrayHandle values_h;
4486   switch (javaThreadState) {
4487     case JAVA_THREAD_STATE_NEW : {
4488       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4489       values_h = typeArrayHandle(THREAD, r);
4490       values_h->int_at_put(0, java_lang_Thread::NEW);
4491       break;
4492     }
4493     case JAVA_THREAD_STATE_RUNNABLE : {
4494       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4495       values_h = typeArrayHandle(THREAD, r);
4496       values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4497       break;
4498     }
4499     case JAVA_THREAD_STATE_BLOCKED : {
4500       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4501       values_h = typeArrayHandle(THREAD, r);
4502       values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4503       break;
4504     }
4505     case JAVA_THREAD_STATE_WAITING : {
4506       typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4507       values_h = typeArrayHandle(THREAD, r);
4508       values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4509       values_h->int_at_put(1, java_lang_Thread::PARKED);
4510       break;
4511     }
4512     case JAVA_THREAD_STATE_TIMED_WAITING : {
4513       typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4514       values_h = typeArrayHandle(THREAD, r);
4515       values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4516       values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4517       values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4518       break;
4519     }
4520     case JAVA_THREAD_STATE_TERMINATED : {
4521       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4522       values_h = typeArrayHandle(THREAD, r);
4523       values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4524       break;
4525     }
4526     default:
4527       // Unknown state - probably incompatible JDK version
4528       return NULL;
4529   }
4530 
4531   return (jintArray) JNIHandles::make_local(env, values_h());
4532 }
4533 JVM_END
4534 
4535 
4536 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4537                                                 jint javaThreadState,
4538                                                 jintArray values))
4539 {
4540   // If new thread states are added in future JDK and VM versions,
4541   // this should check if the JDK version is compatible with thread
4542   // states supported by the VM.  Return NULL if not compatible.
4543   //
4544   // This function must map the VM java_lang_Thread::ThreadStatus
4545   // to the Java thread state that the JDK supports.
4546   //
4547 
4548   ResourceMark rm;
4549 
4550   // Check if threads is null
4551   if (values == NULL) {
4552     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4553   }
4554 
4555   typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4556   typeArrayHandle values_h(THREAD, v);
4557 
4558   objArrayHandle names_h;
4559   switch (javaThreadState) {
4560     case JAVA_THREAD_STATE_NEW : {
4561       assert(values_h->length() == 1 &&
4562                values_h->int_at(0) == java_lang_Thread::NEW,
4563              "Invalid threadStatus value");
4564 
4565       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4566                                                1, /* only 1 substate */
4567                                                CHECK_NULL);
4568       names_h = objArrayHandle(THREAD, r);
4569       Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4570       names_h->obj_at_put(0, name());
4571       break;
4572     }
4573     case JAVA_THREAD_STATE_RUNNABLE : {
4574       assert(values_h->length() == 1 &&
4575                values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4576              "Invalid threadStatus value");
4577 
4578       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4579                                                1, /* only 1 substate */
4580                                                CHECK_NULL);
4581       names_h = objArrayHandle(THREAD, r);
4582       Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4583       names_h->obj_at_put(0, name());
4584       break;
4585     }
4586     case JAVA_THREAD_STATE_BLOCKED : {
4587       assert(values_h->length() == 1 &&
4588                values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4589              "Invalid threadStatus value");
4590 
4591       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4592                                                1, /* only 1 substate */
4593                                                CHECK_NULL);
4594       names_h = objArrayHandle(THREAD, r);
4595       Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4596       names_h->obj_at_put(0, name());
4597       break;
4598     }
4599     case JAVA_THREAD_STATE_WAITING : {
4600       assert(values_h->length() == 2 &&
4601                values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4602                values_h->int_at(1) == java_lang_Thread::PARKED,
4603              "Invalid threadStatus value");
4604       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4605                                                2, /* number of substates */
4606                                                CHECK_NULL);
4607       names_h = objArrayHandle(THREAD, r);
4608       Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4609                                                        CHECK_NULL);
4610       Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4611                                                        CHECK_NULL);
4612       names_h->obj_at_put(0, name0());
4613       names_h->obj_at_put(1, name1());
4614       break;
4615     }
4616     case JAVA_THREAD_STATE_TIMED_WAITING : {
4617       assert(values_h->length() == 3 &&
4618                values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4619                values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4620                values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4621              "Invalid threadStatus value");
4622       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4623                                                3, /* number of substates */
4624                                                CHECK_NULL);
4625       names_h = objArrayHandle(THREAD, r);
4626       Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4627                                                        CHECK_NULL);
4628       Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4629                                                        CHECK_NULL);
4630       Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4631                                                        CHECK_NULL);
4632       names_h->obj_at_put(0, name0());
4633       names_h->obj_at_put(1, name1());
4634       names_h->obj_at_put(2, name2());
4635       break;
4636     }
4637     case JAVA_THREAD_STATE_TERMINATED : {
4638       assert(values_h->length() == 1 &&
4639                values_h->int_at(0) == java_lang_Thread::TERMINATED,
4640              "Invalid threadStatus value");
4641       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4642                                                1, /* only 1 substate */
4643                                                CHECK_NULL);
4644       names_h = objArrayHandle(THREAD, r);
4645       Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4646       names_h->obj_at_put(0, name());
4647       break;
4648     }
4649     default:
4650       // Unknown state - probably incompatible JDK version
4651       return NULL;
4652   }
4653   return (jobjectArray) JNIHandles::make_local(env, names_h());
4654 }
4655 JVM_END
4656 
4657 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4658 {
4659   memset(info, 0, sizeof(info_size));
4660 
4661   info->jvm_version = Abstract_VM_Version::jvm_version();
4662   info->update_version = 0;          /* 0 in HotSpot Express VM */
4663   info->special_update_version = 0;  /* 0 in HotSpot Express VM */
4664 
4665   // when we add a new capability in the jvm_version_info struct, we should also
4666   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4667   // counter defined in runtimeService.cpp.
4668   info->is_attachable = AttachListener::is_attach_supported();
4669 }
4670 JVM_END