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