jdk8-mips64-public/hotspot: src/share/vm/prims/jvm.cpp@fa9ea9d2801f (annotated)

src/share/vm/prims/jvm.cpp@fa9ea9d2801f (annotated)

src/share/vm/prims/jvm.cpp

Fri, 23 Sep 2016 23:07:57 -0700

author: asaha
date: Fri, 23 Sep 2016 23:07:57 -0700
changeset 8628: fa9ea9d2801f
parent 8609: db2cffccdb85
parent 8586: 1ccd27199595
child 8716: 619700f41f8e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/classLoader.hpp"
 #include "classfile/classLoaderExt.hpp"
 #include "classfile/javaAssertions.hpp"
 #include "classfile/javaClasses.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #if INCLUDE_CDS
 #include "classfile/sharedClassUtil.hpp"
 #include "classfile/systemDictionaryShared.hpp"
 #endif
 #include "classfile/vmSymbols.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
 #include "interpreter/bytecode.hpp"
 #include "memory/oopFactory.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/fieldStreams.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/method.hpp"
 #include "prims/jvm.h"
 #include "prims/jvm_misc.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "prims/nativeLookup.hpp"
 #include "prims/privilegedStack.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/dtraceJSDT.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/init.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/java.hpp"
 #include "runtime/javaCalls.hpp"
 #include "runtime/jfieldIDWorkaround.hpp"
 #include "runtime/orderAccess.inline.hpp"
 #include "runtime/os.hpp"
 #include "runtime/perfData.hpp"
 #include "runtime/reflection.hpp"
 #include "runtime/vframe.hpp"
 #include "runtime/vm_operations.hpp"
 #include "services/attachListener.hpp"
 #include "services/management.hpp"
 #include "services/threadService.hpp"
 #include "trace/tracing.hpp"
 #include "utilities/copy.hpp"
 #include "utilities/defaultStream.hpp"
 #include "utilities/dtrace.hpp"
 #include "utilities/events.hpp"
 #include "utilities/histogram.hpp"
 #include "utilities/top.hpp"
 #include "utilities/utf8.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "jvm_linux.h"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "jvm_solaris.h"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "jvm_windows.h"
 #endif
 #ifdef TARGET_OS_FAMILY_aix
 # include "jvm_aix.h"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "jvm_bsd.h"
 #endif
 #include <errno.h>
 #ifndef USDT2
 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
 #endif /* !USDT2 */
 /*
   NOTE about use of any ctor or function call that can trigger a safepoint/GC:
   such ctors and calls MUST NOT come between an oop declaration/init and its
   usage because if objects are move this may cause various memory stomps, bus
   errors and segfaults. Here is a cookbook for causing so called "naked oop
   failures":
       JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
           JVMWrapper("JVM_GetClassDeclaredFields");
           // Object address to be held directly in mirror & not visible to GC
           oop mirror = JNIHandles::resolve_non_null(ofClass);
           // If this ctor can hit a safepoint, moving objects around, then
           ComplexConstructor foo;
           // Boom! mirror may point to JUNK instead of the intended object
           (some dereference of mirror)
           // Here's another call that may block for GC, making mirror stale
           MutexLocker ml(some_lock);
           // And here's an initializer that can result in a stale oop
           // all in one step.
           oop o = call_that_can_throw_exception(TRAPS);
   The solution is to keep the oop declaration BELOW the ctor or function
   call that might cause a GC, do another resolve to reassign the oop, or
   consider use of a Handle instead of an oop so there is immunity from object
   motion. But note that the "QUICK" entries below do not have a handlemark
   and thus can only support use of handles passed in.
 */
 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
   ResourceMark rm;
   int line_number = -1;
   const char * source_file = NULL;
   const char * trace = "explicit";
   InstanceKlass* caller = NULL;
   JavaThread* jthread = JavaThread::current();
   if (jthread->has_last_Java_frame()) {
     vframeStream vfst(jthread);
     // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
     TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
     Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
     TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
     Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
     Method* last_caller = NULL;
     while (!vfst.at_end()) {
       Method* m = vfst.method();
       if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
           !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
           !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
         break;
       }
       last_caller = m;
       vfst.next();
     }
     // if this is called from Class.forName0 and that is called from Class.forName,
     // then print the caller of Class.forName.  If this is Class.loadClass, then print
     // that caller, otherwise keep quiet since this should be picked up elsewhere.
     bool found_it = false;
     if (!vfst.at_end() &&
         vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
         vfst.method()->name() == vmSymbols::forName0_name()) {
       vfst.next();
       if (!vfst.at_end() &&
           vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
           vfst.method()->name() == vmSymbols::forName_name()) {
         vfst.next();
         found_it = true;
       }
     } else if (last_caller != NULL &&
                last_caller->method_holder()->name() ==
                vmSymbols::java_lang_ClassLoader() &&
                (last_caller->name() == vmSymbols::loadClassInternal_name() ||
                 last_caller->name() == vmSymbols::loadClass_name())) {
       found_it = true;
     } else if (!vfst.at_end()) {
       if (vfst.method()->is_native()) {
         // JNI call
         found_it = true;
       }
     }
     if (found_it && !vfst.at_end()) {
       // found the caller
       caller = vfst.method()->method_holder();
       line_number = vfst.method()->line_number_from_bci(vfst.bci());
       if (line_number == -1) {
         // show method name if it's a native method
         trace = vfst.method()->name_and_sig_as_C_string();
       }
       Symbol* s = caller->source_file_name();
       if (s != NULL) {
         source_file = s->as_C_string();
       }
     }
   }
   if (caller != NULL) {
     if (to_class != caller) {
       const char * from = caller->external_name();
       const char * to = to_class->external_name();
       // print in a single call to reduce interleaving between threads
       if (source_file != NULL) {
         tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
       } else {
         tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
       }
     }
   }
 }
 void trace_class_resolution(Klass* to_class) {
   EXCEPTION_MARK;
   trace_class_resolution_impl(to_class, THREAD);
   if (HAS_PENDING_EXCEPTION) {
     CLEAR_PENDING_EXCEPTION;
   }
 }
 // Wrapper to trace JVM functions
 #ifdef ASSERT
   class JVMTraceWrapper : public StackObj {
    public:
     JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
       if (TraceJVMCalls) {
         va_list ap;
         va_start(ap, format);
         tty->print("JVM ");
         tty->vprint_cr(format, ap);
         va_end(ap);
       }
     }
   };
   Histogram* JVMHistogram;
   volatile jint JVMHistogram_lock = 0;
   class JVMHistogramElement : public HistogramElement {
     public:
      JVMHistogramElement(const char* name);
   };
   JVMHistogramElement::JVMHistogramElement(const char* elementName) {
     _name = elementName;
     uintx count = 0;
     while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
       while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
         count +=1;
         if ( (WarnOnStalledSpinLock > 0)
           && (count % WarnOnStalledSpinLock == 0)) {
           warning("JVMHistogram_lock seems to be stalled");
         }
       }
      }
     if(JVMHistogram == NULL)
       JVMHistogram = new Histogram("JVM Call Counts",100);
     JVMHistogram->add_element(this);
     Atomic::dec(&JVMHistogram_lock);
   }
   #define JVMCountWrapper(arg) \
       static JVMHistogramElement* e = new JVMHistogramElement(arg); \
       if (e != NULL) e->increment_count();  // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
   #define JVMWrapper(arg1)                    JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
   #define JVMWrapper2(arg1, arg2)             JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
   #define JVMWrapper3(arg1, arg2, arg3)       JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
   #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
 #else
   #define JVMWrapper(arg1)
   #define JVMWrapper2(arg1, arg2)
   #define JVMWrapper3(arg1, arg2, arg3)
   #define JVMWrapper4(arg1, arg2, arg3, arg4)
 #endif
 // Interface version /////////////////////////////////////////////////////////////////////
 JVM_LEAF(jint, JVM_GetInterfaceVersion())
   return JVM_INTERFACE_VERSION;
 JVM_END
 // java.lang.System //////////////////////////////////////////////////////////////////////
 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
   JVMWrapper("JVM_CurrentTimeMillis");
   return os::javaTimeMillis();
 JVM_END
 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
   JVMWrapper("JVM_NanoTime");
   return os::javaTimeNanos();
 JVM_END
 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
                                jobject dst, jint dst_pos, jint length))
   JVMWrapper("JVM_ArrayCopy");
   // Check if we have null pointers
   if (src == NULL || dst == NULL) {
     THROW(vmSymbols::java_lang_NullPointerException());
   }
   arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
   arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
   assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
   assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
   // Do copy
   s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
 JVM_END
 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
   JavaValue r(T_OBJECT);
   // public synchronized Object put(Object key, Object value);
   HandleMark hm(THREAD);
   Handle key_str    = java_lang_String::create_from_platform_dependent_str(key, CHECK);
   Handle value_str  = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
   JavaCalls::call_virtual(&r,
                           props,
                           KlassHandle(THREAD, SystemDictionary::Properties_klass()),
                           vmSymbols::put_name(),
                           vmSymbols::object_object_object_signature(),
                           key_str,
                           value_str,
                           THREAD);
 }
 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
   JVMWrapper("JVM_InitProperties");
   ResourceMark rm;
   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
   // System property list includes both user set via -D option and
   // jvm system specific properties.
   for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
     PUTPROP(props, p->key(), p->value());
   }
   // Convert the -XX:MaxDirectMemorySize= command line flag
   // to the sun.nio.MaxDirectMemorySize property.
   // Do this after setting user properties to prevent people
   // from setting the value with a -D option, as requested.
   {
     if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
       PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
     } else {
       char as_chars[256];
       jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
       PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
     }
   }
   // JVM monitoring and management support
   // Add the sun.management.compiler property for the compiler's name
   {
 #undef CSIZE
 #if defined(_LP64) || defined(_WIN64)
   #define CSIZE "64-Bit "
 #else
   #define CSIZE
 #endif // 64bit
 #ifdef TIERED
     const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
 #else
 #if defined(COMPILER1)
     const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
 #elif defined(COMPILER2)
     const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
 #else
     const char* compiler_name = "";
 #endif // compilers
 #endif // TIERED
     if (*compiler_name != '\0' &&
         (Arguments::mode() != Arguments::_int)) {
       PUTPROP(props, "sun.management.compiler", compiler_name);
     }
   }
   const char* enableSharedLookupCache = "false";
 #if INCLUDE_CDS
   if (ClassLoaderExt::is_lookup_cache_enabled()) {
     enableSharedLookupCache = "true";
   }
 #endif
   PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache);
   return properties;
 JVM_END
 /*
  * Return the temporary directory that the VM uses for the attach
  * and perf data files.
  *
  * It is important that this directory is well-known and the
  * same for all VM instances. It cannot be affected by configuration
  * variables such as java.io.tmpdir.
  */
 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
   JVMWrapper("JVM_GetTemporaryDirectory");
   HandleMark hm(THREAD);
   const char* temp_dir = os::get_temp_directory();
   Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
   return (jstring) JNIHandles::make_local(env, h());
 JVM_END
 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
 extern volatile jint vm_created;
 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
   if (vm_created != 0 && (code == 0)) {
     // The VM is about to exit. We call back into Java to check whether finalizers should be run
     Universe::run_finalizers_on_exit();
   }
   before_exit(thread);
   vm_exit(code);
 JVM_END
 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
   before_exit(thread);
   vm_exit(code);
 JVM_END
 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
   register_on_exit_function(func);
 JVM_END
 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
   JVMWrapper("JVM_GC");
   if (!DisableExplicitGC) {
     Universe::heap()->collect(GCCause::_java_lang_system_gc);
   }
 JVM_END
 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
   JVMWrapper("JVM_MaxObjectInspectionAge");
   return Universe::heap()->millis_since_last_gc();
 JVM_END
 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
   if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
 JVM_END
 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
   if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
 JVM_END
 static inline jlong convert_size_t_to_jlong(size_t val) {
   // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
   NOT_LP64 (return (jlong)val;)
   LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
 }
 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
   JVMWrapper("JVM_TotalMemory");
   size_t n = Universe::heap()->capacity();
   return convert_size_t_to_jlong(n);
 JVM_END
 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
   JVMWrapper("JVM_FreeMemory");
   CollectedHeap* ch = Universe::heap();
   size_t n;
   {
      MutexLocker x(Heap_lock);
      n = ch->capacity() - ch->used();
   }
   return convert_size_t_to_jlong(n);
 JVM_END
 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
   JVMWrapper("JVM_MaxMemory");
   size_t n = Universe::heap()->max_capacity();
   return convert_size_t_to_jlong(n);
 JVM_END
 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
   JVMWrapper("JVM_ActiveProcessorCount");
   return os::active_processor_count();
 JVM_END
 // java.lang.Throwable //////////////////////////////////////////////////////
 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
   JVMWrapper("JVM_FillInStackTrace");
   Handle exception(thread, JNIHandles::resolve_non_null(receiver));
   java_lang_Throwable::fill_in_stack_trace(exception);
 JVM_END
 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
   JVMWrapper("JVM_GetStackTraceDepth");
   oop exception = JNIHandles::resolve(throwable);
   return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
 JVM_END
 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
   JVMWrapper("JVM_GetStackTraceElement");
   JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
   oop exception = JNIHandles::resolve(throwable);
   oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
   return JNIHandles::make_local(env, element);
 JVM_END
 // java.lang.Object ///////////////////////////////////////////////
 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
   JVMWrapper("JVM_IHashCode");
   // as implemented in the classic virtual machine; return 0 if object is NULL
   return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
 JVM_END
 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
   JVMWrapper("JVM_MonitorWait");
   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
   if (JvmtiExport::should_post_monitor_wait()) {
     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
     // The current thread already owns the monitor and it has not yet
     // been added to the wait queue so the current thread cannot be
     // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
     // event handler cannot accidentally consume an unpark() meant for
     // the ParkEvent associated with this ObjectMonitor.
   }
   ObjectSynchronizer::wait(obj, ms, CHECK);
 JVM_END
 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
   JVMWrapper("JVM_MonitorNotify");
   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
   ObjectSynchronizer::notify(obj, CHECK);
 JVM_END
 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
   JVMWrapper("JVM_MonitorNotifyAll");
   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
   ObjectSynchronizer::notifyall(obj, CHECK);
 JVM_END
 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
   JVMWrapper("JVM_Clone");
   Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
   const KlassHandle klass (THREAD, obj->klass());
   JvmtiVMObjectAllocEventCollector oam;
 #ifdef ASSERT
   // Just checking that the cloneable flag is set correct
   if (obj->is_array()) {
     guarantee(klass->is_cloneable(), "all arrays are cloneable");
   } else {
     guarantee(obj->is_instance(), "should be instanceOop");
     bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
     guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
   }
 #endif
   // Check if class of obj supports the Cloneable interface.
   // All arrays are considered to be cloneable (See JLS 20.1.5)
   if (!klass->is_cloneable()) {
     ResourceMark rm(THREAD);
     THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
   }
   // Make shallow object copy
   const int size = obj->size();
   oop new_obj_oop = NULL;
   if (obj->is_array()) {
     const int length = ((arrayOop)obj())->length();
     new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
   } else {
     new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
   }
   // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
   // is modifying a reference field in the clonee, a non-oop-atomic copy might
   // be suspended in the middle of copying the pointer and end up with parts
   // of two different pointers in the field.  Subsequent dereferences will crash.
   // 4846409: an oop-copy of objects with long or double fields or arrays of same
   // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
   // of oops.  We know objects are aligned on a minimum of an jlong boundary.
   // The same is true of StubRoutines::object_copy and the various oop_copy
   // variants, and of the code generated by the inline_native_clone intrinsic.
   assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
   Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
                                (size_t)align_object_size(size) / HeapWordsPerLong);
   // Clear the header
   new_obj_oop->init_mark();
   // Store check (mark entire object and let gc sort it out)
   BarrierSet* bs = Universe::heap()->barrier_set();
   assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
   bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
   Handle new_obj(THREAD, new_obj_oop);
   // Special handling for MemberNames.  Since they contain Method* metadata, they
   // must be registered so that RedefineClasses can fix metadata contained in them.
   if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
       java_lang_invoke_MemberName::is_method(new_obj())) {
     Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
     // MemberName may be unresolved, so doesn't need registration until resolved.
     if (method != NULL) {
       methodHandle m(THREAD, method);
       // This can safepoint and redefine method, so need both new_obj and method
       // in a handle, for two different reasons.  new_obj can move, method can be
       // deleted if nothing is using it on the stack.
       m->method_holder()->add_member_name(new_obj());
     }
   }
   // Caution: this involves a java upcall, so the clone should be
   // "gc-robust" by this stage.
   if (klass->has_finalizer()) {
     assert(obj->is_instance(), "should be instanceOop");
     new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
     new_obj = Handle(THREAD, new_obj_oop);
   }
   return JNIHandles::make_local(env, new_obj());
 JVM_END
 // java.lang.Compiler ////////////////////////////////////////////////////
 // The initial cuts of the HotSpot VM will not support JITs, and all existing
 // JITs would need extensive changes to work with HotSpot.  The JIT-related JVM
 // functions are all silently ignored unless JVM warnings are printed.
 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
   if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
 JVM_END
 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
   if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
   return JNI_FALSE;
 JVM_END
 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
   if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
   return JNI_FALSE;
 JVM_END
 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
   if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
   return JNI_FALSE;
 JVM_END
 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
   if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
   return NULL;
 JVM_END
 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
   if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
 JVM_END
 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
   if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
 JVM_END
 // Error message support //////////////////////////////////////////////////////
 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
   JVMWrapper("JVM_GetLastErrorString");
   return (jint)os::lasterror(buf, len);
 JVM_END
 // java.io.File ///////////////////////////////////////////////////////////////
 JVM_LEAF(char*, JVM_NativePath(char* path))
   JVMWrapper2("JVM_NativePath (%s)", path);
   return os::native_path(path);
 JVM_END
 // Misc. class handling ///////////////////////////////////////////////////////////
 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
   JVMWrapper("JVM_GetCallerClass");
   // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
   // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
   // temporarily for existing code to use until a replacement API is defined.
   if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
     Klass* k = thread->security_get_caller_class(depth);
     return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
   }
   // Getting the class of the caller frame.
   //
   // The call stack at this point looks something like this:
   //
   // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
   // [1] [ @CallerSensitive API.method                                   ]
   // [.] [ (skipped intermediate frames)                                 ]
   // [n] [ caller                                                        ]
   vframeStream vfst(thread);
   // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
   for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
     Method* m = vfst.method();
     assert(m != NULL, "sanity");
     switch (n) {
     case 0:
       // This must only be called from Reflection.getCallerClass
       if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
       }
       // fall-through
     case 1:
       // Frame 0 and 1 must be caller sensitive.
       if (!m->caller_sensitive()) {
         THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
       }
       break;
     default:
       if (!m->is_ignored_by_security_stack_walk()) {
         // We have reached the desired frame; return the holder class.
         return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
       }
       break;
     }
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
   JVMWrapper("JVM_FindPrimitiveClass");
   oop mirror = NULL;
   BasicType t = name2type(utf);
   if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
     mirror = Universe::java_mirror(t);
   }
   if (mirror == NULL) {
     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
   } else {
     return (jclass) JNIHandles::make_local(env, mirror);
   }
 JVM_END
 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
   JVMWrapper("JVM_ResolveClass");
   if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
 JVM_END
 JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname))
   JVMWrapper("JVM_KnownToNotExist");
 #if INCLUDE_CDS
   return ClassLoaderExt::known_to_not_exist(env, loader, classname, CHECK_(false));
 #else
   return false;
 #endif
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader))
   JVMWrapper("JVM_GetResourceLookupCacheURLs");
 #if INCLUDE_CDS
   return ClassLoaderExt::get_lookup_cache_urls(env, loader, CHECK_NULL);
 #else
   return NULL;
 #endif
 JVM_END
 JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name))
   JVMWrapper("JVM_GetResourceLookupCache");
 #if INCLUDE_CDS
   return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, CHECK_NULL);
 #else
   return NULL;
 #endif
 JVM_END
 // Returns a class loaded by the bootstrap class loader; or null
 // if not found.  ClassNotFoundException is not thrown.
 //
 // Rationale behind JVM_FindClassFromBootLoader
 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
 // b> because of (a) java.dll has a direct dependecy on the  unexported
 //    private symbol "_JVM_FindClassFromClassLoader@20".
 // c> the launcher cannot use the private symbol as it dynamically opens
 //    the entry point, so if something changes, the launcher will fail
 //    unexpectedly at runtime, it is safest for the launcher to dlopen a
 //    stable exported interface.
 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
 //    signature to change from _JVM_FindClassFromClassLoader@20 to
 //    JVM_FindClassFromClassLoader and will not be backward compatible
 //    with older JDKs.
 // Thus a public/stable exported entry point is the right solution,
 // public here means public in linker semantics, and is exported only
 // to the JDK, and is not intended to be a public API.
 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
                                               const char* name))
   JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
   // Java libraries should ensure that name is never null...
   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     return NULL;
   }
   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
   Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
   if (k == NULL) {
     return NULL;
   }
   if (TraceClassResolution) {
     trace_class_resolution(k);
   }
   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 JVM_END
 // Not used; JVM_FindClassFromCaller replaces this.
 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
                                                jboolean init, jobject loader,
                                                jboolean throwError))
   JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
                throwError ? "error" : "exception");
   // Java libraries should ensure that name is never null...
   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     if (throwError) {
       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
     } else {
       THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
     }
   }
   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
   Handle h_loader(THREAD, JNIHandles::resolve(loader));
   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
                                                Handle(), throwError, THREAD);
   if (TraceClassResolution && result != NULL) {
     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
   }
   return result;
 JVM_END
 // Find a class with this name in this loader, using the caller's protection domain.
 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
                                           jboolean init, jobject loader,
                                           jclass caller))
   JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
   // Java libraries should ensure that name is never null...
   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
   }
   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
   oop loader_oop = JNIHandles::resolve(loader);
   oop from_class = JNIHandles::resolve(caller);
   oop protection_domain = NULL;
   // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
   // NPE. Put it in another way, the bootstrap class loader has all permission and
   // thus no checkPackageAccess equivalence in the VM class loader.
   // The caller is also passed as NULL by the java code if there is no security
   // manager to avoid the performance cost of getting the calling class.
   if (from_class != NULL && loader_oop != NULL) {
     protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
   }
   Handle h_loader(THREAD, loader_oop);
   Handle h_prot(THREAD, protection_domain);
   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
                                                h_prot, false, THREAD);
   if (TraceClassResolution && result != NULL) {
     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
   }
   return result;
 JVM_END
 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
                                          jboolean init, jclass from))
   JVMWrapper2("JVM_FindClassFromClass %s", name);
   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
   }
   TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
   oop from_class_oop = JNIHandles::resolve(from);
   Klass* from_class = (from_class_oop == NULL)
                            ? (Klass*)NULL
                            : java_lang_Class::as_Klass(from_class_oop);
   oop class_loader = NULL;
   oop protection_domain = NULL;
   if (from_class != NULL) {
     class_loader = from_class->class_loader();
     protection_domain = from_class->protection_domain();
   }
   Handle h_loader(THREAD, class_loader);
   Handle h_prot  (THREAD, protection_domain);
   jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
                                                h_prot, true, thread);
   if (TraceClassResolution && result != NULL) {
     // this function is generally only used for class loading during verification.
     ResourceMark rm;
     oop from_mirror = JNIHandles::resolve_non_null(from);
     Klass* from_class = java_lang_Class::as_Klass(from_mirror);
     const char * from_name = from_class->external_name();
     oop mirror = JNIHandles::resolve_non_null(result);
     Klass* to_class = java_lang_Class::as_Klass(mirror);
     const char * to = to_class->external_name();
     tty->print("RESOLVE %s %s (verification)\n", from_name, to);
   }
   return result;
 JVM_END
 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
   if (loader.is_null()) {
     return;
   }
   // check whether the current caller thread holds the lock or not.
   // If not, increment the corresponding counter
   if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
       ObjectSynchronizer::owner_self) {
     counter->inc();
   }
 }
 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
 // and JVM_DefineClassWithSourceCond()
 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
                                       jobject loader, const jbyte *buf,
                                       jsize len, jobject pd, const char *source,
                                       jboolean verify, TRAPS) {
   if (source == NULL)  source = "__JVM_DefineClass__";
   assert(THREAD->is_Java_thread(), "must be a JavaThread");
   JavaThread* jt = (JavaThread*) THREAD;
   PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
                              ClassLoader::perf_define_appclass_selftime(),
                              ClassLoader::perf_define_appclasses(),
                              jt->get_thread_stat()->perf_recursion_counts_addr(),
                              jt->get_thread_stat()->perf_timers_addr(),
                              PerfClassTraceTime::DEFINE_CLASS);
   if (UsePerfData) {
     ClassLoader::perf_app_classfile_bytes_read()->inc(len);
   }
   // Since exceptions can be thrown, class initialization can take place
   // if name is NULL no check for class name in .class stream has to be made.
   TempNewSymbol class_name = NULL;
   if (name != NULL) {
     const int str_len = (int)strlen(name);
     if (str_len > Symbol::max_length()) {
       // It's impossible to create this class;  the name cannot fit
       // into the constant pool.
       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
     }
     class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
   }
   ResourceMark rm(THREAD);
   ClassFileStream st((u1*) buf, len, (char *)source);
   Handle class_loader (THREAD, JNIHandles::resolve(loader));
   if (UsePerfData) {
     is_lock_held_by_thread(class_loader,
                            ClassLoader::sync_JVMDefineClassLockFreeCounter(),
                            THREAD);
   }
   Handle protection_domain (THREAD, JNIHandles::resolve(pd));
   Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
                                                      protection_domain, &st,
                                                      verify != 0,
                                                      CHECK_NULL);
   if (TraceClassResolution && k != NULL) {
     trace_class_resolution(k);
   }
   return (jclass) JNIHandles::make_local(env, k->java_mirror());
 }
 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
   JVMWrapper2("JVM_DefineClass %s", name);
   return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
 JVM_END
 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
   JVMWrapper2("JVM_DefineClassWithSource %s", name);
   return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
 JVM_END
 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
                                                 jobject loader, const jbyte *buf,
                                                 jsize len, jobject pd,
                                                 const char *source, jboolean verify))
   JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
   return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
 JVM_END
 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
   JVMWrapper("JVM_FindLoadedClass");
   ResourceMark rm(THREAD);
   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
   Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
   const char* str   = java_lang_String::as_utf8_string(string());
   // Sanity check, don't expect null
   if (str == NULL) return NULL;
   const int str_len = (int)strlen(str);
   if (str_len > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     return NULL;
   }
   TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
   // Security Note:
   //   The Java level wrapper will perform the necessary security check allowing
   //   us to pass the NULL as the initiating class loader.
   Handle h_loader(THREAD, JNIHandles::resolve(loader));
   if (UsePerfData) {
     is_lock_held_by_thread(h_loader,
                            ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
                            THREAD);
   }
   Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
                                                               h_loader,
                                                               Handle(),
                                                               CHECK_NULL);
 #if INCLUDE_CDS
   if (k == NULL) {
     // If the class is not already loaded, try to see if it's in the shared
     // archive for the current classloader (h_loader).
     instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
         klass_name, h_loader, CHECK_NULL);
     k = ik();
   }
 #endif
   return (k == NULL) ? NULL :
             (jclass) JNIHandles::make_local(env, k->java_mirror());
 JVM_END
 // Reflection support //////////////////////////////////////////////////////////////////////////////
 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
   assert (cls != NULL, "illegal class");
   JVMWrapper("JVM_GetClassName");
   JvmtiVMObjectAllocEventCollector oam;
   ResourceMark rm(THREAD);
   const char* name;
   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
     name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
   } else {
     // Consider caching interned string in Klass
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
     assert(k->is_klass(), "just checking");
     name = k->external_name();
   }
   oop result = StringTable::intern((char*) name, CHECK_NULL);
   return (jstring) JNIHandles::make_local(env, result);
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassInterfaces");
   JvmtiVMObjectAllocEventCollector oam;
   oop mirror = JNIHandles::resolve_non_null(cls);
   // Special handling for primitive objects
   if (java_lang_Class::is_primitive(mirror)) {
     // Primitive objects does not have any interfaces
     objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
     return (jobjectArray) JNIHandles::make_local(env, r);
   }
   KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
   // Figure size of result array
   int size;
   if (klass->oop_is_instance()) {
     size = InstanceKlass::cast(klass())->local_interfaces()->length();
   } else {
     assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
     size = 2;
   }
   // Allocate result array
   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
   objArrayHandle result (THREAD, r);
   // Fill in result
   if (klass->oop_is_instance()) {
     // Regular instance klass, fill in all local interfaces
     for (int index = 0; index < size; index++) {
       Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
       result->obj_at_put(index, k->java_mirror());
     }
   } else {
     // All arrays implement java.lang.Cloneable and java.io.Serializable
     result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
     result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
   }
   return (jobjectArray) JNIHandles::make_local(env, result());
 JVM_END
 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassLoader");
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     return NULL;
   }
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   oop loader = k->class_loader();
   return JNIHandles::make_local(env, loader);
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_IsInterface");
   oop mirror = JNIHandles::resolve_non_null(cls);
   if (java_lang_Class::is_primitive(mirror)) {
     return JNI_FALSE;
   }
   Klass* k = java_lang_Class::as_Klass(mirror);
   jboolean result = k->is_interface();
   assert(!result || k->oop_is_instance(),
          "all interfaces are instance types");
   // The compiler intrinsic for isInterface tests the
   // Klass::_access_flags bits in the same way.
   return result;
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassSigners");
   JvmtiVMObjectAllocEventCollector oam;
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     // There are no signers for primitive types
     return NULL;
   }
   objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
   // If there are no signers set in the class, or if the class
   // is an array, return NULL.
   if (signers == NULL) return NULL;
   // copy of the signers array
   Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
   objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
   for (int index = 0; index < signers->length(); index++) {
     signers_copy->obj_at_put(index, signers->obj_at(index));
   }
   // return the copy
   return (jobjectArray) JNIHandles::make_local(env, signers_copy);
 JVM_END
 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
   JVMWrapper("JVM_SetClassSigners");
   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     // This call is ignored for primitive types and arrays.
     // Signers are only set once, ClassLoader.java, and thus shouldn't
     // be called with an array.  Only the bootstrap loader creates arrays.
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
     if (k->oop_is_instance()) {
       java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
     }
   }
 JVM_END
 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetProtectionDomain");
   if (JNIHandles::resolve(cls) == NULL) {
     THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
   }
   if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
     // Primitive types does not have a protection domain.
     return NULL;
   }
   oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
   return (jobject) JNIHandles::make_local(env, pd);
 JVM_END
 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
   // If there is a security manager and protection domain, check the access
   // in the protection domain, otherwise it is authorized.
   if (java_lang_System::has_security_manager()) {
     // For bootstrapping, if pd implies method isn't in the JDK, allow
     // this context to revert to older behavior.
     // In this case the isAuthorized field in AccessControlContext is also not
     // present.
     if (Universe::protection_domain_implies_method() == NULL) {
       return true;
     }
     // Whitelist certain access control contexts
     if (java_security_AccessControlContext::is_authorized(context)) {
       return true;
     }
     oop prot = klass->protection_domain();
     if (prot != NULL) {
       // Call pd.implies(new SecurityPermission("createAccessControlContext"))
       // in the new wrapper.
       methodHandle m(THREAD, Universe::protection_domain_implies_method());
       Handle h_prot(THREAD, prot);
       JavaValue result(T_BOOLEAN);
       JavaCallArguments args(h_prot);
       JavaCalls::call(&result, m, &args, CHECK_false);
       return (result.get_jboolean() != 0);
     }
   }
   return true;
 }
 // Create an AccessControlContext with a protection domain with null codesource
 // and null permissions - which gives no permissions.
 oop create_dummy_access_control_context(TRAPS) {
   InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
   Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
   // Call constructor ProtectionDomain(null, null);
   JavaValue result(T_VOID);
   JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
                           vmSymbols::object_initializer_name(),
                           vmSymbols::codesource_permissioncollection_signature(),
                           Handle(), Handle(), CHECK_NULL);
   // new ProtectionDomain[] {pd};
   objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
   context->obj_at_put(0, obj());
   // new AccessControlContext(new ProtectionDomain[] {pd})
   objArrayHandle h_context(THREAD, context);
   oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
   return acc;
 }
 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
   JVMWrapper("JVM_DoPrivileged");
   if (action == NULL) {
     THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
   }
   // Compute the frame initiating the do privileged operation and setup the privileged stack
   vframeStream vfst(thread);
   vfst.security_get_caller_frame(1);
   if (vfst.at_end()) {
     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
   }
   Method* method        = vfst.method();
   instanceKlassHandle klass (THREAD, method->method_holder());
   // Check that action object understands "Object run()"
   Handle h_context;
   if (context != NULL) {
     h_context = Handle(THREAD, JNIHandles::resolve(context));
     bool authorized = is_authorized(h_context, klass, CHECK_NULL);
     if (!authorized) {
       // Create an unprivileged access control object and call it's run function
       // instead.
       oop noprivs = create_dummy_access_control_context(CHECK_NULL);
       h_context = Handle(THREAD, noprivs);
     }
   }
   // Check that action object understands "Object run()"
   Handle object (THREAD, JNIHandles::resolve(action));
   // get run() method
   Method* m_oop = object->klass()->uncached_lookup_method(
                                            vmSymbols::run_method_name(),
                                            vmSymbols::void_object_signature(),
                                            Klass::normal);
   methodHandle m (THREAD, m_oop);
   if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
     THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
   }
   // Stack allocated list of privileged stack elements
   PrivilegedElement pi;
   if (!vfst.at_end()) {
     pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
     thread->set_privileged_stack_top(&pi);
   }
   // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
   // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
   Handle pending_exception;
   JavaValue result(T_OBJECT);
   JavaCallArguments args(object);
   JavaCalls::call(&result, m, &args, THREAD);
   // done with action, remove ourselves from the list
   if (!vfst.at_end()) {
     assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
     thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
   }
   if (HAS_PENDING_EXCEPTION) {
     pending_exception = Handle(THREAD, PENDING_EXCEPTION);
     CLEAR_PENDING_EXCEPTION;
     // JVMTI has already reported the pending exception
     // JVMTI internal flag reset is needed in order to report PrivilegedActionException
     if (THREAD->is_Java_thread()) {
       JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
     }
     if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
         !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
       // Throw a java.security.PrivilegedActionException(Exception e) exception
       JavaCallArguments args(pending_exception);
       THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
                   vmSymbols::exception_void_signature(),
                   &args);
     }
   }
   if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
   return JNIHandles::make_local(env, (oop) result.get_jobject());
 JVM_END
 // Returns the inherited_access_control_context field of the running thread.
 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetInheritedAccessControlContext");
   oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
   return JNIHandles::make_local(env, result);
 JVM_END
 class RegisterArrayForGC {
  private:
   JavaThread *_thread;
  public:
   RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array)  {
     _thread = thread;
     _thread->register_array_for_gc(array);
   }
   ~RegisterArrayForGC() {
     _thread->register_array_for_gc(NULL);
   }
 };
 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetStackAccessControlContext");
   if (!UsePrivilegedStack) return NULL;
   ResourceMark rm(THREAD);
   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
   JvmtiVMObjectAllocEventCollector oam;
   // count the protection domains on the execution stack. We collapse
   // duplicate consecutive protection domains into a single one, as
   // well as stopping when we hit a privileged frame.
   // Use vframeStream to iterate through Java frames
   vframeStream vfst(thread);
   oop previous_protection_domain = NULL;
   Handle privileged_context(thread, NULL);
   bool is_privileged = false;
   oop protection_domain = NULL;
   for(; !vfst.at_end(); vfst.next()) {
     // get method of frame
     Method* method = vfst.method();
     intptr_t* frame_id   = vfst.frame_id();
     // check the privileged frames to see if we have a match
     if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
       // this frame is privileged
       is_privileged = true;
       privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
       protection_domain  = thread->privileged_stack_top()->protection_domain();
     } else {
       protection_domain = method->method_holder()->protection_domain();
     }
     if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
       local_array->push(protection_domain);
       previous_protection_domain = protection_domain;
     }
     if (is_privileged) break;
   }
   // either all the domains on the stack were system domains, or
   // we had a privileged system domain
   if (local_array->is_empty()) {
     if (is_privileged && privileged_context.is_null()) return NULL;
     oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
     return JNIHandles::make_local(env, result);
   }
   // the resource area must be registered in case of a gc
   RegisterArrayForGC ragc(thread, local_array);
   objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
                                                  local_array->length(), CHECK_NULL);
   objArrayHandle h_context(thread, context);
   for (int index = 0; index < local_array->length(); index++) {
     h_context->obj_at_put(index, local_array->at(index));
   }
   oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
   return JNIHandles::make_local(env, result);
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_IsArrayClass");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   return (k != NULL) && k->oop_is_array() ? true : false;
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_IsPrimitiveClass");
   oop mirror = JNIHandles::resolve_non_null(cls);
   return (jboolean) java_lang_Class::is_primitive(mirror);
 JVM_END
 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetComponentType");
   oop mirror = JNIHandles::resolve_non_null(cls);
   oop result = Reflection::array_component_type(mirror, CHECK_NULL);
   return (jclass) JNIHandles::make_local(env, result);
 JVM_END
 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassModifiers");
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     // Primitive type
     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
   }
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
   assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
   return k->modifier_flags();
 JVM_END
 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
   JvmtiVMObjectAllocEventCollector oam;
   // ofClass is a reference to a java_lang_Class object. The mirror object
   // of an InstanceKlass
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
     return (jobjectArray)JNIHandles::make_local(env, result);
   }
   instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
   InnerClassesIterator iter(k);
   if (iter.length() == 0) {
     // Neither an inner nor outer class
     oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
     return (jobjectArray)JNIHandles::make_local(env, result);
   }
   // find inner class info
   constantPoolHandle cp(thread, k->constants());
   int length = iter.length();
   // Allocate temp. result array
   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
   objArrayHandle result (THREAD, r);
   int members = 0;
   for (; !iter.done(); iter.next()) {
     int ioff = iter.inner_class_info_index();
     int ooff = iter.outer_class_info_index();
     if (ioff != 0 && ooff != 0) {
       // Check to see if the name matches the class we're looking for
       // before attempting to find the class.
       if (cp->klass_name_at_matches(k, ooff)) {
         Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
         if (outer_klass == k()) {
            Klass* ik = cp->klass_at(ioff, CHECK_NULL);
            instanceKlassHandle inner_klass (THREAD, ik);
            // Throws an exception if outer klass has not declared k as
            // an inner klass
            Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
            result->obj_at_put(members, inner_klass->java_mirror());
            members++;
         }
       }
     }
   }
   if (members != length) {
     // Return array of right length
     objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
     for(int i = 0; i < members; i++) {
       res->obj_at_put(i, result->obj_at(i));
     }
     return (jobjectArray)JNIHandles::make_local(env, res);
   }
   return (jobjectArray)JNIHandles::make_local(env, result());
 JVM_END
 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
 {
   // ofClass is a reference to a java_lang_Class object.
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
       ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
     return NULL;
   }
   bool inner_is_member = false;
   Klass* outer_klass
     = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
                           )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
   if (outer_klass == NULL)  return NULL;  // already a top-level class
   if (!inner_is_member)  return NULL;     // an anonymous class (inside a method)
   return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
 }
 JVM_END
 // should be in InstanceKlass.cpp, but is here for historical reasons
 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
                                                      bool* inner_is_member,
                                                      TRAPS) {
   Thread* thread = THREAD;
   InnerClassesIterator iter(k);
   if (iter.length() == 0) {
     // No inner class info => no declaring class
     return NULL;
   }
   constantPoolHandle i_cp(thread, k->constants());
   bool found = false;
   Klass* ok;
   instanceKlassHandle outer_klass;
   *inner_is_member = false;
   // Find inner_klass attribute
   for (; !iter.done() && !found; iter.next()) {
     int ioff = iter.inner_class_info_index();
     int ooff = iter.outer_class_info_index();
     int noff = iter.inner_name_index();
     if (ioff != 0) {
       // Check to see if the name matches the class we're looking for
       // before attempting to find the class.
       if (i_cp->klass_name_at_matches(k, ioff)) {
         Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
         found = (k() == inner_klass);
         if (found && ooff != 0) {
           ok = i_cp->klass_at(ooff, CHECK_NULL);
           outer_klass = instanceKlassHandle(thread, ok);
           *inner_is_member = true;
         }
       }
     }
   }
   if (found && outer_klass.is_null()) {
     // It may be anonymous; try for that.
     int encl_method_class_idx = k->enclosing_method_class_index();
     if (encl_method_class_idx != 0) {
       ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
       outer_klass = instanceKlassHandle(thread, ok);
       *inner_is_member = false;
     }
   }
   // If no inner class attribute found for this class.
   if (outer_klass.is_null())  return NULL;
   // Throws an exception if outer klass has not declared k as an inner klass
   // We need evidence that each klass knows about the other, or else
   // the system could allow a spoof of an inner class to gain access rights.
   Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
   return outer_klass();
 }
 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
   assert (cls != NULL, "illegal class");
   JVMWrapper("JVM_GetClassSignature");
   JvmtiVMObjectAllocEventCollector oam;
   ResourceMark rm(THREAD);
   // Return null for arrays and primatives
   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
     if (k->oop_is_instance()) {
       Symbol* sym = InstanceKlass::cast(k)->generic_signature();
       if (sym == NULL) return NULL;
       Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
       return (jstring) JNIHandles::make_local(env, str());
     }
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
   assert (cls != NULL, "illegal class");
   JVMWrapper("JVM_GetClassAnnotations");
   // Return null for arrays and primitives
   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
     if (k->oop_is_instance()) {
       typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
       return (jbyteArray) JNIHandles::make_local(env, a);
     }
   }
   return NULL;
 JVM_END
 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
   // some of this code was adapted from from jni_FromReflectedField
   oop reflected = JNIHandles::resolve_non_null(field);
   oop mirror    = java_lang_reflect_Field::clazz(reflected);
   Klass* k    = java_lang_Class::as_Klass(mirror);
   int slot      = java_lang_reflect_Field::slot(reflected);
   int modifiers = java_lang_reflect_Field::modifiers(reflected);
   KlassHandle kh(THREAD, k);
   intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
   if (modifiers & JVM_ACC_STATIC) {
     // for static fields we only look in the current class
     if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
       assert(false, "cannot find static field");
       return false;
     }
   } else {
     // for instance fields we start with the current class and work
     // our way up through the superclass chain
     if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
       assert(false, "cannot find instance field");
       return false;
     }
   }
   return true;
 }
 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
   // field is a handle to a java.lang.reflect.Field object
   assert(field != NULL, "illegal field");
   JVMWrapper("JVM_GetFieldAnnotations");
   fieldDescriptor fd;
   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
   if (!gotFd) {
     return NULL;
   }
   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
 JVM_END
 static Method* jvm_get_method_common(jobject method) {
   // some of this code was adapted from from jni_FromReflectedMethod
   oop reflected = JNIHandles::resolve_non_null(method);
   oop mirror    = NULL;
   int slot      = 0;
   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
     mirror = java_lang_reflect_Constructor::clazz(reflected);
     slot   = java_lang_reflect_Constructor::slot(reflected);
   } else {
     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
            "wrong type");
     mirror = java_lang_reflect_Method::clazz(reflected);
     slot   = java_lang_reflect_Method::slot(reflected);
   }
   Klass* k = java_lang_Class::as_Klass(mirror);
   Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
   assert(m != NULL, "cannot find method");
   return m;  // caller has to deal with NULL in product mode
 }
 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
   JVMWrapper("JVM_GetMethodAnnotations");
   // method is a handle to a java.lang.reflect.Method object
   Method* m = jvm_get_method_common(method);
   if (m == NULL) {
     return NULL;
   }
   return (jbyteArray) JNIHandles::make_local(env,
     Annotations::make_java_array(m->annotations(), THREAD));
 JVM_END
 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
   JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
   // method is a handle to a java.lang.reflect.Method object
   Method* m = jvm_get_method_common(method);
   if (m == NULL) {
     return NULL;
   }
   return (jbyteArray) JNIHandles::make_local(env,
     Annotations::make_java_array(m->annotation_default(), THREAD));
 JVM_END
 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
   JVMWrapper("JVM_GetMethodParameterAnnotations");
   // method is a handle to a java.lang.reflect.Method object
   Method* m = jvm_get_method_common(method);
   if (m == NULL) {
     return NULL;
   }
   return (jbyteArray) JNIHandles::make_local(env,
     Annotations::make_java_array(m->parameter_annotations(), THREAD));
 JVM_END
 /* Type use annotations support (JDK 1.8) */
 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
   assert (cls != NULL, "illegal class");
   JVMWrapper("JVM_GetClassTypeAnnotations");
   ResourceMark rm(THREAD);
   // Return null for arrays and primitives
   if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
     if (k->oop_is_instance()) {
       AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
       if (type_annotations != NULL) {
         typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
         return (jbyteArray) JNIHandles::make_local(env, a);
       }
     }
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
   assert (method != NULL, "illegal method");
   JVMWrapper("JVM_GetMethodTypeAnnotations");
   // method is a handle to a java.lang.reflect.Method object
   Method* m = jvm_get_method_common(method);
   if (m == NULL) {
     return NULL;
   }
   AnnotationArray* type_annotations = m->type_annotations();
   if (type_annotations != NULL) {
     typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
     return (jbyteArray) JNIHandles::make_local(env, a);
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
   assert (field != NULL, "illegal field");
   JVMWrapper("JVM_GetFieldTypeAnnotations");
   fieldDescriptor fd;
   bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
   if (!gotFd) {
     return NULL;
   }
   return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
 JVM_END
 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
   if (!cp->is_within_bounds(index)) {
     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
   }
 }
 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
 {
   JVMWrapper("JVM_GetMethodParameters");
   // method is a handle to a java.lang.reflect.Method object
   Method* method_ptr = jvm_get_method_common(method);
   methodHandle mh (THREAD, method_ptr);
   Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
   const int num_params = mh->method_parameters_length();
   if (0 != num_params) {
     // make sure all the symbols are properly formatted
     for (int i = 0; i < num_params; i++) {
       MethodParametersElement* params = mh->method_parameters_start();
       int index = params[i].name_cp_index;
       bounds_check(mh->constants(), index, CHECK_NULL);
       if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
         THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
                     "Wrong type at constant pool index");
       }
     }
     objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
     objArrayHandle result (THREAD, result_oop);
     for (int i = 0; i < num_params; i++) {
       MethodParametersElement* params = mh->method_parameters_start();
       // For a 0 index, give a NULL symbol
       Symbol* sym = 0 != params[i].name_cp_index ?
         mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
       int flags = params[i].flags;
       oop param = Reflection::new_parameter(reflected_method, i, sym,
                                             flags, CHECK_NULL);
       result->obj_at_put(i, param);
     }
     return (jobjectArray)JNIHandles::make_local(env, result());
   } else {
     return (jobjectArray)NULL;
   }
 }
 JVM_END
 // New (JDK 1.4) reflection implementation /////////////////////////////////////
 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
 {
   JVMWrapper("JVM_GetClassDeclaredFields");
   JvmtiVMObjectAllocEventCollector oam;
   // Exclude primitive types and array types
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
       java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
     // Return empty array
     oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
     return (jobjectArray) JNIHandles::make_local(env, res);
   }
   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
   constantPoolHandle cp(THREAD, k->constants());
   // Ensure class is linked
   k->link_class(CHECK_NULL);
   // 4496456 We need to filter out java.lang.Throwable.backtrace
   bool skip_backtrace = false;
   // Allocate result
   int num_fields;
   if (publicOnly) {
     num_fields = 0;
     for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
       if (fs.access_flags().is_public()) ++num_fields;
     }
   } else {
     num_fields = k->java_fields_count();
     if (k() == SystemDictionary::Throwable_klass()) {
       num_fields--;
       skip_backtrace = true;
     }
   }
   objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
   objArrayHandle result (THREAD, r);
   int out_idx = 0;
   fieldDescriptor fd;
   for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
     if (skip_backtrace) {
       // 4496456 skip java.lang.Throwable.backtrace
       int offset = fs.offset();
       if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
     }
     if (!publicOnly || fs.access_flags().is_public()) {
       fd.reinitialize(k(), fs.index());
       oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
       result->obj_at_put(out_idx, field);
       ++out_idx;
     }
   }
   assert(out_idx == num_fields, "just checking");
   return (jobjectArray) JNIHandles::make_local(env, result());
 }
 JVM_END
 static bool select_method(methodHandle method, bool want_constructor) {
   if (want_constructor) {
     return (method->is_initializer() && !method->is_static());
   } else {
     return  (!method->is_initializer() && !method->is_overpass());
   }
 }
 static jobjectArray get_class_declared_methods_helper(
                                   JNIEnv *env,
                                   jclass ofClass, jboolean publicOnly,
                                   bool want_constructor,
                                   Klass* klass, TRAPS) {
   JvmtiVMObjectAllocEventCollector oam;
   // Exclude primitive types and array types
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
       || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
     // Return empty array
     oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
     return (jobjectArray) JNIHandles::make_local(env, res);
   }
   instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
   // Ensure class is linked
   k->link_class(CHECK_NULL);
   Array<Method*>* methods = k->methods();
   int methods_length = methods->length();
   // Save original method_idnum in case of redefinition, which can change
   // the idnum of obsolete methods.  The new method will have the same idnum
   // but if we refresh the methods array, the counts will be wrong.
   ResourceMark rm(THREAD);
   GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
   int num_methods = 0;
   for (int i = 0; i < methods_length; i++) {
     methodHandle method(THREAD, methods->at(i));
     if (select_method(method, want_constructor)) {
       if (!publicOnly || method->is_public()) {
         idnums->push(method->method_idnum());
         ++num_methods;
       }
     }
   }
   // Allocate result
   objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
   objArrayHandle result (THREAD, r);
   // Now just put the methods that we selected above, but go by their idnum
   // in case of redefinition.  The methods can be redefined at any safepoint,
   // so above when allocating the oop array and below when creating reflect
   // objects.
   for (int i = 0; i < num_methods; i++) {
     methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
     if (method.is_null()) {
       // Method may have been deleted and seems this API can handle null
       // Otherwise should probably put a method that throws NSME
       result->obj_at_put(i, NULL);
     } else {
       oop m;
       if (want_constructor) {
         m = Reflection::new_constructor(method, CHECK_NULL);
       } else {
         m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
       }
       result->obj_at_put(i, m);
     }
   }
   return (jobjectArray) JNIHandles::make_local(env, result());
 }
 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
 {
   JVMWrapper("JVM_GetClassDeclaredMethods");
   return get_class_declared_methods_helper(env, ofClass, publicOnly,
                                            /*want_constructor*/ false,
                                            SystemDictionary::reflect_Method_klass(), THREAD);
 }
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
 {
   JVMWrapper("JVM_GetClassDeclaredConstructors");
   return get_class_declared_methods_helper(env, ofClass, publicOnly,
                                            /*want_constructor*/ true,
                                            SystemDictionary::reflect_Constructor_klass(), THREAD);
 }
 JVM_END
 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
 {
   JVMWrapper("JVM_GetClassAccessFlags");
   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     // Primitive type
     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
   }
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
 }
 JVM_END
 // Constant pool access //////////////////////////////////////////////////////////
 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
 {
   JVMWrapper("JVM_GetClassConstantPool");
   JvmtiVMObjectAllocEventCollector oam;
   // Return null for primitives and arrays
   if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
     Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
     if (k->oop_is_instance()) {
       instanceKlassHandle k_h(THREAD, k);
       Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
       sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
       return JNIHandles::make_local(jcp());
     }
   }
   return NULL;
 }
 JVM_END
 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
 {
   JVMWrapper("JVM_ConstantPoolGetSize");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   return cp->length();
 }
 JVM_END
 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetClassAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   Klass* k = cp->klass_at(index, CHECK_NULL);
   return (jclass) JNIHandles::make_local(k->java_mirror());
 }
 JVM_END
 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_klass() && !tag.is_unresolved_klass()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
   if (k == NULL) return NULL;
   return (jclass) JNIHandles::make_local(k->java_mirror());
 }
 JVM_END
 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
   constantTag tag = cp->tag_at(index);
   if (!tag.is_method() && !tag.is_interface_method()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   int klass_ref  = cp->uncached_klass_ref_index_at(index);
   Klass* k_o;
   if (force_resolution) {
     k_o = cp->klass_at(klass_ref, CHECK_NULL);
   } else {
     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
     if (k_o == NULL) return NULL;
   }
   instanceKlassHandle k(THREAD, k_o);
   Symbol* name = cp->uncached_name_ref_at(index);
   Symbol* sig  = cp->uncached_signature_ref_at(index);
   methodHandle m (THREAD, k->find_method(name, sig));
   if (m.is_null()) {
     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
   }
   oop method;
   if (!m->is_initializer() || m->is_static()) {
     method = Reflection::new_method(m, true, true, CHECK_NULL);
   } else {
     method = Reflection::new_constructor(m, CHECK_NULL);
   }
   return JNIHandles::make_local(method);
 }
 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetMethodAt");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
   return res;
 }
 JVM_END
 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
   return res;
 }
 JVM_END
 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
   constantTag tag = cp->tag_at(index);
   if (!tag.is_field()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   int klass_ref  = cp->uncached_klass_ref_index_at(index);
   Klass* k_o;
   if (force_resolution) {
     k_o = cp->klass_at(klass_ref, CHECK_NULL);
   } else {
     k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
     if (k_o == NULL) return NULL;
   }
   instanceKlassHandle k(THREAD, k_o);
   Symbol* name = cp->uncached_name_ref_at(index);
   Symbol* sig  = cp->uncached_signature_ref_at(index);
   fieldDescriptor fd;
   Klass* target_klass = k->find_field(name, sig, &fd);
   if (target_klass == NULL) {
     THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
   }
   oop field = Reflection::new_field(&fd, true, CHECK_NULL);
   return JNIHandles::make_local(field);
 }
 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetFieldAt");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
   return res;
 }
 JVM_END
 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
   return res;
 }
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_field_or_method()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   int klass_ref = cp->uncached_klass_ref_index_at(index);
   Symbol*  klass_name  = cp->klass_name_at(klass_ref);
   Symbol*  member_name = cp->uncached_name_ref_at(index);
   Symbol*  member_sig  = cp->uncached_signature_ref_at(index);
   objArrayOop  dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
   objArrayHandle dest(THREAD, dest_o);
   Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
   dest->obj_at_put(0, str());
   str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
   dest->obj_at_put(1, str());
   str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
   dest->obj_at_put(2, str());
   return (jobjectArray) JNIHandles::make_local(dest());
 }
 JVM_END
 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetIntAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_0);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_int()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   return cp->int_at(index);
 }
 JVM_END
 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetLongAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_(0L));
   constantTag tag = cp->tag_at(index);
   if (!tag.is_long()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   return cp->long_at(index);
 }
 JVM_END
 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetFloatAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_(0.0f));
   constantTag tag = cp->tag_at(index);
   if (!tag.is_float()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   return cp->float_at(index);
 }
 JVM_END
 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetDoubleAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_(0.0));
   constantTag tag = cp->tag_at(index);
   if (!tag.is_double()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   return cp->double_at(index);
 }
 JVM_END
 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetStringAt");
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_string()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   oop str = cp->string_at(index, CHECK_NULL);
   return (jstring) JNIHandles::make_local(str);
 }
 JVM_END
 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
 {
   JVMWrapper("JVM_ConstantPoolGetUTF8At");
   JvmtiVMObjectAllocEventCollector oam;
   constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
   bounds_check(cp, index, CHECK_NULL);
   constantTag tag = cp->tag_at(index);
   if (!tag.is_symbol()) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
   }
   Symbol* sym = cp->symbol_at(index);
   Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
   return (jstring) JNIHandles::make_local(str());
 }
 JVM_END
 // Assertion support. //////////////////////////////////////////////////////////
 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
   JVMWrapper("JVM_DesiredAssertionStatus");
   assert(cls != NULL, "bad class");
   oop r = JNIHandles::resolve(cls);
   assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
   if (java_lang_Class::is_primitive(r)) return false;
   Klass* k = java_lang_Class::as_Klass(r);
   assert(k->oop_is_instance(), "must be an instance klass");
   if (! k->oop_is_instance()) return false;
   ResourceMark rm(THREAD);
   const char* name = k->name()->as_C_string();
   bool system_class = k->class_loader() == NULL;
   return JavaAssertions::enabled(name, system_class);
 JVM_END
 // Return a new AssertionStatusDirectives object with the fields filled in with
 // command-line assertion arguments (i.e., -ea, -da).
 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
   JVMWrapper("JVM_AssertionStatusDirectives");
   JvmtiVMObjectAllocEventCollector oam;
   oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
   return JNIHandles::make_local(env, asd);
 JVM_END
 // Verification ////////////////////////////////////////////////////////////////////////////////
 // Reflection for the verifier /////////////////////////////////////////////////////////////////
 // RedefineClasses support: bug 6214132 caused verification to fail.
 // All functions from this section should call the jvmtiThreadSate function:
 //   Klass* class_to_verify_considering_redefinition(Klass* klass).
 // The function returns a Klass* of the _scratch_class if the verifier
 // was invoked in the middle of the class redefinition.
 // Otherwise it returns its argument value which is the _the_class Klass*.
 // Please, refer to the description in the jvmtiThreadSate.hpp.
 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   return k->name()->as_utf8();
 JVM_END
 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
   JVMWrapper("JVM_GetClassCPTypes");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   // types will have length zero if this is not an InstanceKlass
   // (length is determined by call to JVM_GetClassCPEntriesCount)
   if (k->oop_is_instance()) {
     ConstantPool* cp = InstanceKlass::cast(k)->constants();
     for (int index = cp->length() - 1; index >= 0; index--) {
       constantTag tag = cp->tag_at(index);
       types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
   }
   }
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassCPEntriesCount");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   if (!k->oop_is_instance())
     return 0;
   return InstanceKlass::cast(k)->constants()->length();
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassFieldsCount");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   if (!k->oop_is_instance())
     return 0;
   return InstanceKlass::cast(k)->java_fields_count();
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
   JVMWrapper("JVM_GetClassMethodsCount");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   if (!k->oop_is_instance())
     return 0;
   return InstanceKlass::cast(k)->methods()->length();
 JVM_END
 // The following methods, used for the verifier, are never called with
 // array klasses, so a direct cast to InstanceKlass is safe.
 // Typically, these methods are called in a loop with bounds determined
 // by the results of JVM_GetClass{Fields,Methods}Count, which return
 // zero for arrays.
 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
   JVMWrapper("JVM_GetMethodIxExceptionIndexes");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   int length = method->checked_exceptions_length();
   if (length > 0) {
     CheckedExceptionElement* table= method->checked_exceptions_start();
     for (int i = 0; i < length; i++) {
       exceptions[i] = table[i].class_cp_index;
     }
   }
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
   JVMWrapper("JVM_GetMethodIxExceptionsCount");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->checked_exceptions_length();
 JVM_END
 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
   JVMWrapper("JVM_GetMethodIxByteCode");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   memcpy(code, method->code_base(), method->code_size());
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
   JVMWrapper("JVM_GetMethodIxByteCodeLength");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->code_size();
 JVM_END
 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
   JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   ExceptionTable extable(method);
   entry->start_pc   = extable.start_pc(entry_index);
   entry->end_pc     = extable.end_pc(entry_index);
   entry->handler_pc = extable.handler_pc(entry_index);
   entry->catchType  = extable.catch_type_index(entry_index);
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_GetMethodIxExceptionTableLength");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->exception_table_length();
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_GetMethodIxModifiers");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
   JVMWrapper("JVM_GetFieldIxModifiers");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_GetMethodIxLocalsCount");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->max_locals();
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_GetMethodIxArgsSize");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->size_of_parameters();
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_GetMethodIxMaxStack");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->verifier_max_stack();
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_IsConstructorIx");
   ResourceMark rm(THREAD);
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->name() == vmSymbols::object_initializer_name();
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
   JVMWrapper("JVM_IsVMGeneratedMethodIx");
   ResourceMark rm(THREAD);
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->is_overpass();
 JVM_END
 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
   JVMWrapper("JVM_GetMethodIxIxUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->name()->as_utf8();
 JVM_END
 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
   JVMWrapper("JVM_GetMethodIxSignatureUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
   return method->signature()->as_utf8();
 JVM_END
 /**
  * All of these JVM_GetCP-xxx methods are used by the old verifier to
  * read entries in the constant pool.  Since the old verifier always
  * works on a copy of the code, it will not see any rewriting that
  * may possibly occur in the middle of verification.  So it is important
  * that nothing it calls tries to use the cpCache instead of the raw
  * constant pool, so we must use cp->uncached_x methods when appropriate.
  */
 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPFieldNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Fieldref:
       return cp->uncached_name_ref_at(cp_index)->as_utf8();
     default:
       fatal("JVM_GetCPFieldNameUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPMethodNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_InterfaceMethodref:
     case JVM_CONSTANT_Methodref:
       return cp->uncached_name_ref_at(cp_index)->as_utf8();
     default:
       fatal("JVM_GetCPMethodNameUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPMethodSignatureUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_InterfaceMethodref:
     case JVM_CONSTANT_Methodref:
       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
     default:
       fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPFieldSignatureUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Fieldref:
       return cp->uncached_signature_ref_at(cp_index)->as_utf8();
     default:
       fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPClassNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   Symbol* classname = cp->klass_name_at(cp_index);
   return classname->as_utf8();
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPFieldClassNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Fieldref: {
       int class_index = cp->uncached_klass_ref_index_at(cp_index);
       Symbol* classname = cp->klass_name_at(class_index);
       return classname->as_utf8();
     }
     default:
       fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
   JVMWrapper("JVM_GetCPMethodClassNameUTF");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Methodref:
     case JVM_CONSTANT_InterfaceMethodref: {
       int class_index = cp->uncached_klass_ref_index_at(cp_index);
       Symbol* classname = cp->klass_name_at(class_index);
       return classname->as_utf8();
     }
     default:
       fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
   }
   ShouldNotReachHere();
   return NULL;
 JVM_END
 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
   JVMWrapper("JVM_GetCPFieldModifiers");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Fieldref: {
       Symbol* name      = cp->uncached_name_ref_at(cp_index);
       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
       for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
         if (fs.name() == name && fs.signature() == signature) {
           return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
         }
       }
       return -1;
     }
     default:
       fatal("JVM_GetCPFieldModifiers: illegal constant");
   }
   ShouldNotReachHere();
   return 0;
 JVM_END
 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
   JVMWrapper("JVM_GetCPMethodModifiers");
   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
   Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
   k        = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
   k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
   ConstantPool* cp = InstanceKlass::cast(k)->constants();
   switch (cp->tag_at(cp_index).value()) {
     case JVM_CONSTANT_Methodref:
     case JVM_CONSTANT_InterfaceMethodref: {
       Symbol* name      = cp->uncached_name_ref_at(cp_index);
       Symbol* signature = cp->uncached_signature_ref_at(cp_index);
       Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
       int methods_count = methods->length();
       for (int i = 0; i < methods_count; i++) {
         Method* method = methods->at(i);
         if (method->name() == name && method->signature() == signature) {
             return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
         }
       }
       return -1;
     }
     default:
       fatal("JVM_GetCPMethodModifiers: illegal constant");
   }
   ShouldNotReachHere();
   return 0;
 JVM_END
 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
   // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
 JVM_END
 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
   JVMWrapper("JVM_IsSameClassPackage");
   oop class1_mirror = JNIHandles::resolve_non_null(class1);
   oop class2_mirror = JNIHandles::resolve_non_null(class2);
   Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
   Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
   return (jboolean) Reflection::is_same_class_package(klass1, klass2);
 JVM_END
 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
   JVMWrapper2("JVM_Open (%s)", fname);
   //%note jvm_r6
   int result = os::open(fname, flags, mode);
   if (result >= 0) {
     return result;
   } else {
     switch(errno) {
       case EEXIST:
         return JVM_EEXIST;
       default:
         return -1;
     }
   }
 JVM_END
 JVM_LEAF(jint, JVM_Close(jint fd))
   JVMWrapper2("JVM_Close (0x%x)", fd);
   //%note jvm_r6
   return os::close(fd);
 JVM_END
 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
   JVMWrapper2("JVM_Read (0x%x)", fd);
   //%note jvm_r6
   return (jint)os::restartable_read(fd, buf, nbytes);
 JVM_END
 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
   JVMWrapper2("JVM_Write (0x%x)", fd);
   //%note jvm_r6
   return (jint)os::write(fd, buf, nbytes);
 JVM_END
 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
   JVMWrapper2("JVM_Available (0x%x)", fd);
   //%note jvm_r6
   return os::available(fd, pbytes);
 JVM_END
 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
   JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
   //%note jvm_r6
   return os::lseek(fd, offset, whence);
 JVM_END
 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
   JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
   return os::ftruncate(fd, length);
 JVM_END
 JVM_LEAF(jint, JVM_Sync(jint fd))
   JVMWrapper2("JVM_Sync (0x%x)", fd);
   //%note jvm_r6
   return os::fsync(fd);
 JVM_END
 // Printing support //////////////////////////////////////////////////
 extern "C" {
 ATTRIBUTE_PRINTF(3, 0)
 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
   // see bug 4399518, 4417214
   if ((intptr_t)count <= 0) return -1;
   int result = vsnprintf(str, count, fmt, args);
   // Note: on truncation vsnprintf(3) on Unix returns number of
   // characters which would have been written had the buffer been large
   // enough; on Windows, it returns -1. We handle both cases here and
   // always return -1, and perform null termination.
   if ((result > 0 && (size_t)result >= count) || result == -1) {
     str[count - 1] = '\0';
     result = -1;
   }
   return result;
 }
 ATTRIBUTE_PRINTF(3, 0)
 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
   va_list args;
   int len;
   va_start(args, fmt);
   len = jio_vsnprintf(str, count, fmt, args);
   va_end(args);
   return len;
 }
 ATTRIBUTE_PRINTF(2,3)
 int jio_fprintf(FILE* f, const char *fmt, ...) {
   int len;
   va_list args;
   va_start(args, fmt);
   len = jio_vfprintf(f, fmt, args);
   va_end(args);
   return len;
 }
 ATTRIBUTE_PRINTF(2, 0)
 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
   if (Arguments::vfprintf_hook() != NULL) {
      return Arguments::vfprintf_hook()(f, fmt, args);
   } else {
     return vfprintf(f, fmt, args);
   }
 }
 ATTRIBUTE_PRINTF(1, 2)
 JNIEXPORT int jio_printf(const char *fmt, ...) {
   int len;
   va_list args;
   va_start(args, fmt);
   len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
   va_end(args);
   return len;
 }
 // HotSpot specific jio method
 void jio_print(const char* s) {
   // Try to make this function as atomic as possible.
   if (Arguments::vfprintf_hook() != NULL) {
     jio_fprintf(defaultStream::output_stream(), "%s", s);
   } else {
     // Make an unused local variable to avoid warning from gcc 4.x compiler.
     size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
   }
 }
 } // Extern C
 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
 // OSThread objects.  The exception to this rule is when the target object is the thread
 // doing the operation, in which case we know that the thread won't exit until the
 // operation is done (all exits being voluntary).  There are a few cases where it is
 // rather silly to do operations on yourself, like resuming yourself or asking whether
 // you are alive.  While these can still happen, they are not subject to deadlocks if
 // the lock is held while the operation occurs (this is not the case for suspend, for
 // instance), and are very unlikely.  Because IsAlive needs to be fast and its
 // implementation is local to this file, we always lock Threads_lock for that one.
 static void thread_entry(JavaThread* thread, TRAPS) {
   HandleMark hm(THREAD);
   Handle obj(THREAD, thread->threadObj());
   JavaValue result(T_VOID);
   JavaCalls::call_virtual(&result,
                           obj,
                           KlassHandle(THREAD, SystemDictionary::Thread_klass()),
                           vmSymbols::run_method_name(),
                           vmSymbols::void_method_signature(),
                           THREAD);
 }
 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_StartThread");
   JavaThread *native_thread = NULL;
   // We cannot hold the Threads_lock when we throw an exception,
   // due to rank ordering issues. Example:  we might need to grab the
   // Heap_lock while we construct the exception.
   bool throw_illegal_thread_state = false;
   // We must release the Threads_lock before we can post a jvmti event
   // in Thread::start.
   {
     // Ensure that the C++ Thread and OSThread structures aren't freed before
     // we operate.
     MutexLocker mu(Threads_lock);
     // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
     // re-starting an already started thread, so we should usually find
     // that the JavaThread is null. However for a JNI attached thread
     // there is a small window between the Thread object being created
     // (with its JavaThread set) and the update to its threadStatus, so we
     // have to check for this
     if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
       throw_illegal_thread_state = true;
     } else {
       // We could also check the stillborn flag to see if this thread was already stopped, but
       // for historical reasons we let the thread detect that itself when it starts running
       jlong size =
              java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
       // Allocate the C++ Thread structure and create the native thread.  The
       // stack size retrieved from java is signed, but the constructor takes
       // size_t (an unsigned type), so avoid passing negative values which would
       // result in really large stacks.
       size_t sz = size > 0 ? (size_t) size : 0;
       native_thread = new JavaThread(&thread_entry, sz);
       // At this point it may be possible that no osthread was created for the
       // JavaThread due to lack of memory. Check for this situation and throw
       // an exception if necessary. Eventually we may want to change this so
       // that we only grab the lock if the thread was created successfully -
       // then we can also do this check and throw the exception in the
       // JavaThread constructor.
       if (native_thread->osthread() != NULL) {
         // Note: the current thread is not being used within "prepare".
         native_thread->prepare(jthread);
       }
     }
   }
   if (throw_illegal_thread_state) {
     THROW(vmSymbols::java_lang_IllegalThreadStateException());
   }
   assert(native_thread != NULL, "Starting null thread?");
   if (native_thread->osthread() == NULL) {
     // No one should hold a reference to the 'native_thread'.
     delete native_thread;
     if (JvmtiExport::should_post_resource_exhausted()) {
       JvmtiExport::post_resource_exhausted(
         JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
         "unable to create new native thread");
     }
     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
               "unable to create new native thread");
   }
   Thread::start(native_thread);
 JVM_END
 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
 // before the quasi-asynchronous exception is delivered.  This is a little obtrusive,
 // but is thought to be reliable and simple. In the case, where the receiver is the
 // same thread as the sender, no safepoint is needed.
 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
   JVMWrapper("JVM_StopThread");
   oop java_throwable = JNIHandles::resolve(throwable);
   if (java_throwable == NULL) {
     THROW(vmSymbols::java_lang_NullPointerException());
   }
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   JavaThread* receiver = java_lang_Thread::thread(java_thread);
   Events::log_exception(JavaThread::current(),
                         "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
                         p2i(receiver), p2i((address)java_thread), p2i(throwable));
   // First check if thread is alive
   if (receiver != NULL) {
     // Check if exception is getting thrown at self (use oop equality, since the
     // target object might exit)
     if (java_thread == thread->threadObj()) {
       THROW_OOP(java_throwable);
     } else {
       // Enques a VM_Operation to stop all threads and then deliver the exception...
       Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
     }
   }
   else {
     // Either:
     // - target thread has not been started before being stopped, or
     // - target thread already terminated
     // We could read the threadStatus to determine which case it is
     // but that is overkill as it doesn't matter. We must set the
     // stillborn flag for the first case, and if the thread has already
     // exited setting this flag has no affect
     java_lang_Thread::set_stillborn(java_thread);
   }
 JVM_END
 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_IsThreadAlive");
   oop thread_oop = JNIHandles::resolve_non_null(jthread);
   return java_lang_Thread::is_alive(thread_oop);
 JVM_END
 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_SuspendThread");
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   JavaThread* receiver = java_lang_Thread::thread(java_thread);
   if (receiver != NULL) {
     // thread has run and has not exited (still on threads list)
     {
       MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
       if (receiver->is_external_suspend()) {
         // Don't allow nested external suspend requests. We can't return
         // an error from this interface so just ignore the problem.
         return;
       }
       if (receiver->is_exiting()) { // thread is in the process of exiting
         return;
       }
       receiver->set_external_suspend();
     }
     // java_suspend() will catch threads in the process of exiting
     // and will ignore them.
     receiver->java_suspend();
     // It would be nice to have the following assertion in all the
     // time, but it is possible for a racing resume request to have
     // resumed this thread right after we suspended it. Temporarily
     // enable this assertion if you are chasing a different kind of
     // bug.
     //
     // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
     //   receiver->is_being_ext_suspended(), "thread is not suspended");
   }
 JVM_END
 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_ResumeThread");
   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
   // We need to *always* get the threads lock here, since this operation cannot be allowed during
   // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
   // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
   // looks at it.
   MutexLocker ml(Threads_lock);
   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
   if (thr != NULL) {
     // the thread has run and is not in the process of exiting
     thr->java_resume();
   }
 JVM_END
 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
   JVMWrapper("JVM_SetThreadPriority");
   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
   MutexLocker ml(Threads_lock);
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
   JavaThread* thr = java_lang_Thread::thread(java_thread);
   if (thr != NULL) {                  // Thread not yet started; priority pushed down when it is
     Thread::set_priority(thr, (ThreadPriority)prio);
   }
 JVM_END
 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
   JVMWrapper("JVM_Yield");
   if (os::dont_yield()) return;
 #ifndef USDT2
   HS_DTRACE_PROBE0(hotspot, thread__yield);
 #else /* USDT2 */
   HOTSPOT_THREAD_YIELD();
 #endif /* USDT2 */
   // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
   // Critical for similar threading behaviour
   if (ConvertYieldToSleep) {
     os::sleep(thread, MinSleepInterval, false);
   } else {
     os::yield();
   }
 JVM_END
 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
   JVMWrapper("JVM_Sleep");
   if (millis < 0) {
     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
   }
   if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
     THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
   }
   // Save current thread state and restore it at the end of this block.
   // And set new thread state to SLEEPING.
   JavaThreadSleepState jtss(thread);
 #ifndef USDT2
   HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
 #else /* USDT2 */
   HOTSPOT_THREAD_SLEEP_BEGIN(
                              millis);
 #endif /* USDT2 */
   EventThreadSleep event;
   if (millis == 0) {
     // When ConvertSleepToYield is on, this matches the classic VM implementation of
     // JVM_Sleep. Critical for similar threading behaviour (Win32)
     // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
     // for SOLARIS
     if (ConvertSleepToYield) {
       os::yield();
     } else {
       ThreadState old_state = thread->osthread()->get_state();
       thread->osthread()->set_state(SLEEPING);
       os::sleep(thread, MinSleepInterval, false);
       thread->osthread()->set_state(old_state);
     }
   } else {
     ThreadState old_state = thread->osthread()->get_state();
     thread->osthread()->set_state(SLEEPING);
     if (os::sleep(thread, millis, true) == OS_INTRPT) {
       // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
       // us while we were sleeping. We do not overwrite those.
       if (!HAS_PENDING_EXCEPTION) {
         if (event.should_commit()) {
           event.set_time(millis);
           event.commit();
         }
 #ifndef USDT2
         HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
 #else /* USDT2 */
         HOTSPOT_THREAD_SLEEP_END(
 );
 #endif /* USDT2 */
         // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
         // to properly restore the thread state.  That's likely wrong.
         THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
       }
     }
     thread->osthread()->set_state(old_state);
   }
   if (event.should_commit()) {
     event.set_time(millis);
     event.commit();
   }
 #ifndef USDT2
   HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
 #else /* USDT2 */
   HOTSPOT_THREAD_SLEEP_END(
 );
 #endif /* USDT2 */
 JVM_END
 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
   JVMWrapper("JVM_CurrentThread");
   oop jthread = thread->threadObj();
   assert (thread != NULL, "no current thread!");
   return JNIHandles::make_local(env, jthread);
 JVM_END
 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_CountStackFrames");
   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   bool throw_illegal_thread_state = false;
   int count = 0;
   {
     MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
     // We need to re-resolve the java_thread, since a GC might have happened during the
     // acquire of the lock
     JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
     if (thr == NULL) {
       // do nothing
     } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
       // Check whether this java thread has been suspended already. If not, throws
       // IllegalThreadStateException. We defer to throw that exception until
       // Threads_lock is released since loading exception class has to leave VM.
       // The correct way to test a thread is actually suspended is
       // wait_for_ext_suspend_completion(), but we can't call that while holding
       // the Threads_lock. The above tests are sufficient for our purposes
       // provided the walkability of the stack is stable - which it isn't
       // 100% but close enough for most practical purposes.
       throw_illegal_thread_state = true;
     } else {
       // Count all java activation, i.e., number of vframes
       for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
         // Native frames are not counted
         if (!vfst.method()->is_native()) count++;
        }
     }
   }
   if (throw_illegal_thread_state) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
                 "this thread is not suspended");
   }
   return count;
 JVM_END
 // Consider: A better way to implement JVM_Interrupt() is to acquire
 // Threads_lock to resolve the jthread into a Thread pointer, fetch
 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
 // outside the critical section.  Threads_lock is hot so we want to minimize
 // the hold-time.  A cleaner interface would be to decompose interrupt into
 // two steps.  The 1st phase, performed under Threads_lock, would return
 // a closure that'd be invoked after Threads_lock was dropped.
 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
 // admit spurious wakeups.
 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
   JVMWrapper("JVM_Interrupt");
   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
   // We need to re-resolve the java_thread, since a GC might have happened during the
   // acquire of the lock
   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
   if (thr != NULL) {
     Thread::interrupt(thr);
   }
 JVM_END
 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
   JVMWrapper("JVM_IsInterrupted");
   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
   // We need to re-resolve the java_thread, since a GC might have happened during the
   // acquire of the lock
   JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
   if (thr == NULL) {
     return JNI_FALSE;
   } else {
     return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
   }
 JVM_END
 // Return true iff the current thread has locked the object passed in
 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
   JVMWrapper("JVM_HoldsLock");
   assert(THREAD->is_Java_thread(), "sanity check");
   if (obj == NULL) {
     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
   }
   Handle h_obj(THREAD, JNIHandles::resolve(obj));
   return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
 JVM_END
 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
   JVMWrapper("JVM_DumpAllStacks");
   VM_PrintThreads op;
   VMThread::execute(&op);
   if (JvmtiExport::should_post_data_dump()) {
     JvmtiExport::post_data_dump();
   }
 JVM_END
 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
   JVMWrapper("JVM_SetNativeThreadName");
   ResourceMark rm(THREAD);
   oop java_thread = JNIHandles::resolve_non_null(jthread);
   JavaThread* thr = java_lang_Thread::thread(java_thread);
   // Thread naming only supported for the current thread, doesn't work for
   // target threads.
   if (Thread::current() == thr && !thr->has_attached_via_jni()) {
     // we don't set the name of an attached thread to avoid stepping
     // on other programs
     const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
     os::set_native_thread_name(thread_name);
   }
 JVM_END
 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
   assert(jthread->is_Java_thread(), "must be a Java thread");
   if (jthread->privileged_stack_top() == NULL) return false;
   if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
     oop loader = jthread->privileged_stack_top()->class_loader();
     if (loader == NULL) return true;
     bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
     if (trusted) return true;
   }
   return false;
 }
 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
   JVMWrapper("JVM_CurrentLoadedClass");
   ResourceMark rm(THREAD);
   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
     bool trusted = is_trusted_frame(thread, &vfst);
     if (trusted) return NULL;
     Method* m = vfst.method();
     if (!m->is_native()) {
       InstanceKlass* holder = m->method_holder();
       oop loader = holder->class_loader();
       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
         return (jclass) JNIHandles::make_local(env, holder->java_mirror());
       }
     }
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
   JVMWrapper("JVM_CurrentClassLoader");
   ResourceMark rm(THREAD);
   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
     // if a method in a class in a trusted loader is in a doPrivileged, return NULL
     bool trusted = is_trusted_frame(thread, &vfst);
     if (trusted) return NULL;
     Method* m = vfst.method();
     if (!m->is_native()) {
       InstanceKlass* holder = m->method_holder();
       assert(holder->is_klass(), "just checking");
       oop loader = holder->class_loader();
       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
         return JNIHandles::make_local(env, loader);
       }
     }
   }
   return NULL;
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
   JVMWrapper("JVM_GetClassContext");
   ResourceMark rm(THREAD);
   JvmtiVMObjectAllocEventCollector oam;
   vframeStream vfst(thread);
   if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
     // This must only be called from SecurityManager.getClassContext
     Method* m = vfst.method();
     if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
           m->name()          == vmSymbols::getClassContext_name() &&
           m->signature()     == vmSymbols::void_class_array_signature())) {
       THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
     }
   }
   // Collect method holders
   GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
   for (; !vfst.at_end(); vfst.security_next()) {
     Method* m = vfst.method();
     // Native frames are not returned
     if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
       Klass* holder = m->method_holder();
       assert(holder->is_klass(), "just checking");
       klass_array->append(holder);
     }
   }
   // Create result array of type [Ljava/lang/Class;
   objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
   // Fill in mirrors corresponding to method holders
   for (int i = 0; i < klass_array->length(); i++) {
     result->obj_at_put(i, klass_array->at(i)->java_mirror());
   }
   return (jobjectArray) JNIHandles::make_local(env, result);
 JVM_END
 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
   JVMWrapper("JVM_ClassDepth");
   ResourceMark rm(THREAD);
   Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
   Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
   const char* str = java_lang_String::as_utf8_string(class_name_str());
   TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
   if (class_name_sym == NULL) {
     return -1;
   }
   int depth = 0;
   for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
     if (!vfst.method()->is_native()) {
       InstanceKlass* holder = vfst.method()->method_holder();
       assert(holder->is_klass(), "just checking");
       if (holder->name() == class_name_sym) {
         return depth;
       }
       depth++;
     }
   }
   return -1;
 JVM_END
 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
   JVMWrapper("JVM_ClassLoaderDepth");
   ResourceMark rm(THREAD);
   int depth = 0;
   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
     // if a method in a class in a trusted loader is in a doPrivileged, return -1
     bool trusted = is_trusted_frame(thread, &vfst);
     if (trusted) return -1;
     Method* m = vfst.method();
     if (!m->is_native()) {
       InstanceKlass* holder = m->method_holder();
       assert(holder->is_klass(), "just checking");
       oop loader = holder->class_loader();
       if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
         return depth;
       }
       depth++;
     }
   }
   return -1;
 JVM_END
 // java.lang.Package ////////////////////////////////////////////////////////////////
 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
   JVMWrapper("JVM_GetSystemPackage");
   ResourceMark rm(THREAD);
   JvmtiVMObjectAllocEventCollector oam;
   char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
   oop result = ClassLoader::get_system_package(str, CHECK_NULL);
   return (jstring) JNIHandles::make_local(result);
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
   JVMWrapper("JVM_GetSystemPackages");
   JvmtiVMObjectAllocEventCollector oam;
   objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
   return (jobjectArray) JNIHandles::make_local(result);
 JVM_END
 // ObjectInputStream ///////////////////////////////////////////////////////////////
 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
   if (current_class == NULL) {
     return true;
   }
   if ((current_class == field_class) || access.is_public()) {
     return true;
   }
   if (access.is_protected()) {
     // See if current_class is a subclass of field_class
     if (current_class->is_subclass_of(field_class)) {
       return true;
     }
   }
   return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
 }
 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
   JVMWrapper("JVM_AllocateNewObject");
   JvmtiVMObjectAllocEventCollector oam;
   // Receiver is not used
   oop curr_mirror = JNIHandles::resolve_non_null(currClass);
   oop init_mirror = JNIHandles::resolve_non_null(initClass);
   // Cannot instantiate primitive types
   if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
     ResourceMark rm(THREAD);
     THROW_0(vmSymbols::java_lang_InvalidClassException());
   }
   // Arrays not allowed here, must use JVM_AllocateNewArray
   if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
       java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
     ResourceMark rm(THREAD);
     THROW_0(vmSymbols::java_lang_InvalidClassException());
   }
   instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
   instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
   assert(curr_klass->is_subclass_of(init_klass()), "just checking");
   // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
   curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
   // Make sure klass is initialized, since we are about to instantiate one of them.
   curr_klass->initialize(CHECK_NULL);
  methodHandle m (THREAD,
                  init_klass->find_method(vmSymbols::object_initializer_name(),
                                          vmSymbols::void_method_signature()));
   if (m.is_null()) {
     ResourceMark rm(THREAD);
     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
                 Method::name_and_sig_as_C_string(init_klass(),
                                           vmSymbols::object_initializer_name(),
                                           vmSymbols::void_method_signature()));
   }
   if (curr_klass ==  init_klass && !m->is_public()) {
     // Calling the constructor for class 'curr_klass'.
     // Only allow calls to a public no-arg constructor.
     // This path corresponds to creating an Externalizable object.
     THROW_0(vmSymbols::java_lang_IllegalAccessException());
   }
   if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
     // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
     THROW_0(vmSymbols::java_lang_IllegalAccessException());
   }
   Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
   // Call constructor m. This might call a constructor higher up in the hierachy
   JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
   return JNIHandles::make_local(obj());
 JVM_END
 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
   JVMWrapper("JVM_AllocateNewArray");
   JvmtiVMObjectAllocEventCollector oam;
   oop mirror = JNIHandles::resolve_non_null(currClass);
   if (java_lang_Class::is_primitive(mirror)) {
     THROW_0(vmSymbols::java_lang_InvalidClassException());
   }
   Klass* k = java_lang_Class::as_Klass(mirror);
   oop result;
   if (k->oop_is_typeArray()) {
     // typeArray
     result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
   } else if (k->oop_is_objArray()) {
     // objArray
     ObjArrayKlass* oak = ObjArrayKlass::cast(k);
     oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
     result = oak->allocate(length, CHECK_NULL);
   } else {
     THROW_0(vmSymbols::java_lang_InvalidClassException());
   }
   return JNIHandles::make_local(env, result);
 JVM_END
 // Return the first non-null class loader up the execution stack, or null
 // if only code from the null class loader is on the stack.
 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
   for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
     // UseNewReflection
     vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
     oop loader = vfst.method()->method_holder()->class_loader();
     if (loader != NULL) {
       return JNIHandles::make_local(env, loader);
     }
   }
   return NULL;
 JVM_END
 // Load a class relative to the most recent class on the stack  with a non-null
 // classloader.
 // This function has been deprecated and should not be considered part of the
 // specified JVM interface.
 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
                                  jclass currClass, jstring currClassName))
   JVMWrapper("JVM_LoadClass0");
   // Receiver is not used
   ResourceMark rm(THREAD);
   // Class name argument is not guaranteed to be in internal format
   Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
   Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
   const char* str = java_lang_String::as_utf8_string(string());
   if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
     // It's impossible to create this class;  the name cannot fit
     // into the constant pool.
     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
   }
   TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
   Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
   // Find the most recent class on the stack with a non-null classloader
   oop loader = NULL;
   oop protection_domain = NULL;
   if (curr_klass.is_null()) {
     for (vframeStream vfst(thread);
          !vfst.at_end() && loader == NULL;
          vfst.next()) {
       if (!vfst.method()->is_native()) {
         InstanceKlass* holder = vfst.method()->method_holder();
         loader             = holder->class_loader();
         protection_domain  = holder->protection_domain();
       }
     }
   } else {
     Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
     loader            = InstanceKlass::cast(curr_klass_oop)->class_loader();
     protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
   }
   Handle h_loader(THREAD, loader);
   Handle h_prot  (THREAD, protection_domain);
   jclass result =  find_class_from_class_loader(env, name, true, h_loader, h_prot,
                                                 false, thread);
   if (TraceClassResolution && result != NULL) {
     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
   }
   return result;
 JVM_END
 // Array ///////////////////////////////////////////////////////////////////////////////////////////
 // resolve array handle and check arguments
 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
   if (arr == NULL) {
     THROW_0(vmSymbols::java_lang_NullPointerException());
   }
   oop a = JNIHandles::resolve_non_null(arr);
   if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
   }
   return arrayOop(a);
 }
 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
   JVMWrapper("JVM_GetArrayLength");
   arrayOop a = check_array(env, arr, false, CHECK_0);
   return a->length();
 JVM_END
 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
   JVMWrapper("JVM_Array_Get");
   JvmtiVMObjectAllocEventCollector oam;
   arrayOop a = check_array(env, arr, false, CHECK_NULL);
   jvalue value;
   BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
   oop box = Reflection::box(&value, type, CHECK_NULL);
   return JNIHandles::make_local(env, box);
 JVM_END
 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
   JVMWrapper("JVM_GetPrimitiveArrayElement");
   jvalue value;
   value.i = 0; // to initialize value before getting used in CHECK
   arrayOop a = check_array(env, arr, true, CHECK_(value));
   assert(a->is_typeArray(), "just checking");
   BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
   BasicType wide_type = (BasicType) wCode;
   if (type != wide_type) {
     Reflection::widen(&value, type, wide_type, CHECK_(value));
   }
   return value;
 JVM_END
 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
   JVMWrapper("JVM_SetArrayElement");
   arrayOop a = check_array(env, arr, false, CHECK);
   oop box = JNIHandles::resolve(val);
   jvalue value;
   value.i = 0; // to initialize value before getting used in CHECK
   BasicType value_type;
   if (a->is_objArray()) {
     // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
     value_type = Reflection::unbox_for_regular_object(box, &value);
   } else {
     value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
   }
   Reflection::array_set(&value, a, index, value_type, CHECK);
 JVM_END
 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
   JVMWrapper("JVM_SetPrimitiveArrayElement");
   arrayOop a = check_array(env, arr, true, CHECK);
   assert(a->is_typeArray(), "just checking");
   BasicType value_type = (BasicType) vCode;
   Reflection::array_set(&v, a, index, value_type, CHECK);
 JVM_END
 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
   JVMWrapper("JVM_NewArray");
   JvmtiVMObjectAllocEventCollector oam;
   oop element_mirror = JNIHandles::resolve(eltClass);
   oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
   return JNIHandles::make_local(env, result);
 JVM_END
 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
   JVMWrapper("JVM_NewMultiArray");
   JvmtiVMObjectAllocEventCollector oam;
   arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
   oop element_mirror = JNIHandles::resolve(eltClass);
   assert(dim_array->is_typeArray(), "just checking");
   oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
   return JNIHandles::make_local(env, result);
 JVM_END
 // Networking library support ////////////////////////////////////////////////////////////////////
 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
   JVMWrapper("JVM_InitializeSocketLibrary");
   return 0;
 JVM_END
 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
   JVMWrapper("JVM_Socket");
   return os::socket(domain, type, protocol);
 JVM_END
 JVM_LEAF(jint, JVM_SocketClose(jint fd))
   JVMWrapper2("JVM_SocketClose (0x%x)", fd);
   //%note jvm_r6
   return os::socket_close(fd);
 JVM_END
 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
   JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
   //%note jvm_r6
   return os::socket_shutdown(fd, howto);
 JVM_END
 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
   JVMWrapper2("JVM_Recv (0x%x)", fd);
   //%note jvm_r6
   return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
 JVM_END
 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
   JVMWrapper2("JVM_Send (0x%x)", fd);
   //%note jvm_r6
   return os::send(fd, buf, (size_t)nBytes, (uint)flags);
 JVM_END
 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
   JVMWrapper2("JVM_Timeout (0x%x)", fd);
   //%note jvm_r6
   return os::timeout(fd, timeout);
 JVM_END
 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
   JVMWrapper2("JVM_Listen (0x%x)", fd);
   //%note jvm_r6
   return os::listen(fd, count);
 JVM_END
 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
   JVMWrapper2("JVM_Connect (0x%x)", fd);
   //%note jvm_r6
   return os::connect(fd, him, (socklen_t)len);
 JVM_END
 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
   JVMWrapper2("JVM_Bind (0x%x)", fd);
   //%note jvm_r6
   return os::bind(fd, him, (socklen_t)len);
 JVM_END
 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
   JVMWrapper2("JVM_Accept (0x%x)", fd);
   //%note jvm_r6
   socklen_t socklen = (socklen_t)(*len);
   jint result = os::accept(fd, him, &socklen);
   *len = (jint)socklen;
   return result;
 JVM_END
 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
   JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
   //%note jvm_r6
   socklen_t socklen = (socklen_t)(*fromlen);
   jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
   *fromlen = (int)socklen;
   return result;
 JVM_END
 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
   JVMWrapper2("JVM_GetSockName (0x%x)", fd);
   //%note jvm_r6
   socklen_t socklen = (socklen_t)(*len);
   jint result = os::get_sock_name(fd, him, &socklen);
   *len = (int)socklen;
   return result;
 JVM_END
 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
   JVMWrapper2("JVM_SendTo (0x%x)", fd);
   //%note jvm_r6
   return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
 JVM_END
 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
   JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
   //%note jvm_r6
   return os::socket_available(fd, pbytes);
 JVM_END
 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
   //%note jvm_r6
   socklen_t socklen = (socklen_t)(*optlen);
   jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
   *optlen = (int)socklen;
   return result;
 JVM_END
 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
   JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
   //%note jvm_r6
   return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
 JVM_END
 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
   JVMWrapper("JVM_GetHostName");
   return os::get_host_name(name, namelen);
 JVM_END
 // Library support ///////////////////////////////////////////////////////////////////////////
 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
   //%note jvm_ct
   JVMWrapper2("JVM_LoadLibrary (%s)", name);
   char ebuf[1024];
   void *load_result;
   {
     ThreadToNativeFromVM ttnfvm(thread);
     load_result = os::dll_load(name, ebuf, sizeof ebuf);
   }
   if (load_result == NULL) {
     char msg[1024];
     jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
     // Since 'ebuf' may contain a string encoded using
     // platform encoding scheme, we need to pass
     // Exceptions::unsafe_to_utf8 to the new_exception method
     // as the last argument. See bug 6367357.
     Handle h_exception =
       Exceptions::new_exception(thread,
                                 vmSymbols::java_lang_UnsatisfiedLinkError(),
                                 msg, Exceptions::unsafe_to_utf8);
     THROW_HANDLE_0(h_exception);
   }
   return load_result;
 JVM_END
 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
   JVMWrapper("JVM_UnloadLibrary");
   os::dll_unload(handle);
 JVM_END
 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
   JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
   return os::dll_lookup(handle, name);
 JVM_END
 // Floating point support ////////////////////////////////////////////////////////////////////
 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
   JVMWrapper("JVM_IsNaN");
   return g_isnan(a);
 JVM_END
 // JNI version ///////////////////////////////////////////////////////////////////////////////
 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
   JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
   return Threads::is_supported_jni_version_including_1_1(version);
 JVM_END
 // String support ///////////////////////////////////////////////////////////////////////////
 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
   JVMWrapper("JVM_InternString");
   JvmtiVMObjectAllocEventCollector oam;
   if (str == NULL) return NULL;
   oop string = JNIHandles::resolve_non_null(str);
   oop result = StringTable::intern(string, CHECK_NULL);
   return (jstring) JNIHandles::make_local(env, result);
 JVM_END
 // Raw monitor support //////////////////////////////////////////////////////////////////////
 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
 // that only works with java threads.
 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
   VM_Exit::block_if_vm_exited();
   JVMWrapper("JVM_RawMonitorCreate");
   return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
 }
 JNIEXPORT void JNICALL  JVM_RawMonitorDestroy(void *mon) {
   VM_Exit::block_if_vm_exited();
   JVMWrapper("JVM_RawMonitorDestroy");
   delete ((Mutex*) mon);
 }
 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
   VM_Exit::block_if_vm_exited();
   JVMWrapper("JVM_RawMonitorEnter");
   ((Mutex*) mon)->jvm_raw_lock();
   return 0;
 }
 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
   VM_Exit::block_if_vm_exited();
   JVMWrapper("JVM_RawMonitorExit");
   ((Mutex*) mon)->jvm_raw_unlock();
 }
 // Support for Serialization
 typedef jfloat  (JNICALL *IntBitsToFloatFn  )(JNIEnv* env, jclass cb, jint    value);
 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong   value);
 typedef jint    (JNICALL *FloatToIntBitsFn  )(JNIEnv* env, jclass cb, jfloat  value);
 typedef jlong   (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
 static IntBitsToFloatFn   int_bits_to_float_fn   = NULL;
 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
 static FloatToIntBitsFn   float_to_int_bits_fn   = NULL;
 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
 void initialize_converter_functions() {
   if (JDK_Version::is_gte_jdk14x_version()) {
     // These functions only exist for compatibility with 1.3.1 and earlier
     return;
   }
   // called from universe_post_init()
   assert(
     int_bits_to_float_fn   == NULL &&
     long_bits_to_double_fn == NULL &&
     float_to_int_bits_fn   == NULL &&
     double_to_long_bits_fn == NULL ,
     "initialization done twice"
   );
   // initialize
   int_bits_to_float_fn   = CAST_TO_FN_PTR(IntBitsToFloatFn  , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat"  , "(I)F"));
   long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
   float_to_int_bits_fn   = CAST_TO_FN_PTR(FloatToIntBitsFn  , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits"  , "(F)I"));
   double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
   // verify
   assert(
     int_bits_to_float_fn   != NULL &&
     long_bits_to_double_fn != NULL &&
     float_to_int_bits_fn   != NULL &&
     double_to_long_bits_fn != NULL ,
     "initialization failed"
   );
 }
 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
                                     Handle loader, Handle protection_domain,
                                     jboolean throwError, TRAPS) {
   // Security Note:
   //   The Java level wrapper will perform the necessary security check allowing
   //   us to pass the NULL as the initiating class loader.  The VM is responsible for
   //   the checkPackageAccess relative to the initiating class loader via the
   //   protection_domain. The protection_domain is passed as NULL by the java code
   //   if there is no security manager in 3-arg Class.forName().
   Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
   KlassHandle klass_handle(THREAD, klass);
   // Check if we should initialize the class
   if (init && klass_handle->oop_is_instance()) {
     klass_handle->initialize(CHECK_NULL);
   }
   return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
 }
 // Internal SQE debugging support ///////////////////////////////////////////////////////////
 #ifndef PRODUCT
 extern "C" {
   JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
   JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
   JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
 }
 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
   JVMWrapper("JVM_AccessBoolVMFlag");
   return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
 JVM_END
 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
   JVMWrapper("JVM_AccessVMIntFlag");
   intx v;
   jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
   *value = (jint)v;
   return result;
 JVM_END
 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
   JVMWrapper("JVM_VMBreakPoint");
   oop the_obj = JNIHandles::resolve(obj);
   BREAKPOINT;
 JVM_END
 #endif
 // Method ///////////////////////////////////////////////////////////////////////////////////////////
 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
   JVMWrapper("JVM_InvokeMethod");
   Handle method_handle;
   if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
     method_handle = Handle(THREAD, JNIHandles::resolve(method));
     Handle receiver(THREAD, JNIHandles::resolve(obj));
     objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
     oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
     jobject res = JNIHandles::make_local(env, result);
     if (JvmtiExport::should_post_vm_object_alloc()) {
       oop ret_type = java_lang_reflect_Method::return_type(method_handle());
       assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
       if (java_lang_Class::is_primitive(ret_type)) {
         // Only for primitive type vm allocates memory for java object.
         // See box() method.
         JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
       }
     }
     return res;
   } else {
     THROW_0(vmSymbols::java_lang_StackOverflowError());
   }
 JVM_END
 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
   JVMWrapper("JVM_NewInstanceFromConstructor");
   oop constructor_mirror = JNIHandles::resolve(c);
   objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
   oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
   jobject res = JNIHandles::make_local(env, result);
   if (JvmtiExport::should_post_vm_object_alloc()) {
     JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
   }
   return res;
 JVM_END
 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
 JVM_LEAF(jboolean, JVM_SupportsCX8())
   JVMWrapper("JVM_SupportsCX8");
   return VM_Version::supports_cx8();
 JVM_END
 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
   JVMWrapper("JVM_CX8Field");
   jlong res;
   oop             o       = JNIHandles::resolve(obj);
   intptr_t        fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
   volatile jlong* addr    = (volatile jlong*)((address)o + fldOffs);
   assert(VM_Version::supports_cx8(), "cx8 not supported");
   res = Atomic::cmpxchg(newVal, addr, oldVal);
   return res == oldVal;
 JVM_END
 // DTrace ///////////////////////////////////////////////////////////////////
 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
   JVMWrapper("JVM_DTraceGetVersion");
   return (jint)JVM_TRACING_DTRACE_VERSION;
 JVM_END
 JVM_ENTRY(jlong,JVM_DTraceActivate(
     JNIEnv* env, jint version, jstring module_name, jint providers_count,
     JVM_DTraceProvider* providers))
   JVMWrapper("JVM_DTraceActivate");
   return DTraceJSDT::activate(
     version, module_name, providers_count, providers, CHECK_0);
 JVM_END
 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
   JVMWrapper("JVM_DTraceIsProbeEnabled");
   return DTraceJSDT::is_probe_enabled(method);
 JVM_END
 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
   JVMWrapper("JVM_DTraceDispose");
   DTraceJSDT::dispose(handle);
 JVM_END
 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
   JVMWrapper("JVM_DTraceIsSupported");
   return DTraceJSDT::is_supported();
 JVM_END
 // Returns an array of all live Thread objects (VM internal JavaThreads,
 // jvmti agent threads, and JNI attaching threads  are skipped)
 // See CR 6404306 regarding JNI attaching threads
 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
   ResourceMark rm(THREAD);
   ThreadsListEnumerator tle(THREAD, false, false);
   JvmtiVMObjectAllocEventCollector oam;
   int num_threads = tle.num_threads();
   objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
   objArrayHandle threads_ah(THREAD, r);
   for (int i = 0; i < num_threads; i++) {
     Handle h = tle.get_threadObj(i);
     threads_ah->obj_at_put(i, h());
   }
   return (jobjectArray) JNIHandles::make_local(env, threads_ah());
 JVM_END
 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
 // Return StackTraceElement[][], each element is the stack trace of a thread in
 // the corresponding entry in the given threads array
 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
   JVMWrapper("JVM_DumpThreads");
   JvmtiVMObjectAllocEventCollector oam;
   // Check if threads is null
   if (threads == NULL) {
     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
   }
   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
   objArrayHandle ah(THREAD, a);
   int num_threads = ah->length();
   // check if threads is non-empty array
   if (num_threads == 0) {
     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
   }
   // check if threads is not an array of objects of Thread class
   Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
   if (k != SystemDictionary::Thread_klass()) {
     THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
   }
   ResourceMark rm(THREAD);
   GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
   for (int i = 0; i < num_threads; i++) {
     oop thread_obj = ah->obj_at(i);
     instanceHandle h(THREAD, (instanceOop) thread_obj);
     thread_handle_array->append(h);
   }
   Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
   return (jobjectArray)JNIHandles::make_local(env, stacktraces());
 JVM_END
 // JVM monitoring and management support
 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
   return Management::get_jmm_interface(version);
 JVM_END
 // com.sun.tools.attach.VirtualMachine agent properties support
 //
 // Initialize the agent properties with the properties maintained in the VM
 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
   JVMWrapper("JVM_InitAgentProperties");
   ResourceMark rm;
   Handle props(THREAD, JNIHandles::resolve_non_null(properties));
   PUTPROP(props, "sun.java.command", Arguments::java_command());
   PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
   PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
   return properties;
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
 {
   JVMWrapper("JVM_GetEnclosingMethodInfo");
   JvmtiVMObjectAllocEventCollector oam;
   if (ofClass == NULL) {
     return NULL;
   }
   Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
   // Special handling for primitive objects
   if (java_lang_Class::is_primitive(mirror())) {
     return NULL;
   }
   Klass* k = java_lang_Class::as_Klass(mirror());
   if (!k->oop_is_instance()) {
     return NULL;
   }
   instanceKlassHandle ik_h(THREAD, k);
   int encl_method_class_idx = ik_h->enclosing_method_class_index();
   if (encl_method_class_idx == 0) {
     return NULL;
   }
   objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
   objArrayHandle dest(THREAD, dest_o);
   Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
   dest->obj_at_put(0, enc_k->java_mirror());
   int encl_method_method_idx = ik_h->enclosing_method_method_index();
   if (encl_method_method_idx != 0) {
     Symbol* sym = ik_h->constants()->symbol_at(
                         extract_low_short_from_int(
                           ik_h->constants()->name_and_type_at(encl_method_method_idx)));
     Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
     dest->obj_at_put(1, str());
     sym = ik_h->constants()->symbol_at(
               extract_high_short_from_int(
                 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
     str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
     dest->obj_at_put(2, str());
   }
   return (jobjectArray) JNIHandles::make_local(dest());
 }
 JVM_END
 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
                                               jint javaThreadState))
 {
   // If new thread states are added in future JDK and VM versions,
   // this should check if the JDK version is compatible with thread
   // states supported by the VM.  Return NULL if not compatible.
   //
   // This function must map the VM java_lang_Thread::ThreadStatus
   // to the Java thread state that the JDK supports.
   //
   typeArrayHandle values_h;
   switch (javaThreadState) {
     case JAVA_THREAD_STATE_NEW : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::NEW);
       break;
     }
     case JAVA_THREAD_STATE_RUNNABLE : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
       break;
     }
     case JAVA_THREAD_STATE_BLOCKED : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
       break;
     }
     case JAVA_THREAD_STATE_WAITING : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
       values_h->int_at_put(1, java_lang_Thread::PARKED);
       break;
     }
     case JAVA_THREAD_STATE_TIMED_WAITING : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::SLEEPING);
       values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
       values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
       break;
     }
     case JAVA_THREAD_STATE_TERMINATED : {
       typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
       values_h = typeArrayHandle(THREAD, r);
       values_h->int_at_put(0, java_lang_Thread::TERMINATED);
       break;
     }
     default:
       // Unknown state - probably incompatible JDK version
       return NULL;
   }
   return (jintArray) JNIHandles::make_local(env, values_h());
 }
 JVM_END
 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
                                                 jint javaThreadState,
                                                 jintArray values))
 {
   // If new thread states are added in future JDK and VM versions,
   // this should check if the JDK version is compatible with thread
   // states supported by the VM.  Return NULL if not compatible.
   //
   // This function must map the VM java_lang_Thread::ThreadStatus
   // to the Java thread state that the JDK supports.
   //
   ResourceMark rm;
   // Check if threads is null
   if (values == NULL) {
     THROW_(vmSymbols::java_lang_NullPointerException(), 0);
   }
   typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
   typeArrayHandle values_h(THREAD, v);
   objArrayHandle names_h;
   switch (javaThreadState) {
     case JAVA_THREAD_STATE_NEW : {
       assert(values_h->length() == 1 &&
                values_h->int_at(0) == java_lang_Thread::NEW,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* only 1 substate */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
       names_h->obj_at_put(0, name());
       break;
     }
     case JAVA_THREAD_STATE_RUNNABLE : {
       assert(values_h->length() == 1 &&
                values_h->int_at(0) == java_lang_Thread::RUNNABLE,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* only 1 substate */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
       names_h->obj_at_put(0, name());
       break;
     }
     case JAVA_THREAD_STATE_BLOCKED : {
       assert(values_h->length() == 1 &&
                values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* only 1 substate */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
       names_h->obj_at_put(0, name());
       break;
     }
     case JAVA_THREAD_STATE_WAITING : {
       assert(values_h->length() == 2 &&
                values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
                values_h->int_at(1) == java_lang_Thread::PARKED,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* number of substates */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
                                                        CHECK_NULL);
       Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
                                                        CHECK_NULL);
       names_h->obj_at_put(0, name0());
       names_h->obj_at_put(1, name1());
       break;
     }
     case JAVA_THREAD_STATE_TIMED_WAITING : {
       assert(values_h->length() == 3 &&
                values_h->int_at(0) == java_lang_Thread::SLEEPING &&
                values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
                values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* number of substates */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
                                                        CHECK_NULL);
       Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
                                                        CHECK_NULL);
       Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
                                                        CHECK_NULL);
       names_h->obj_at_put(0, name0());
       names_h->obj_at_put(1, name1());
       names_h->obj_at_put(2, name2());
       break;
     }
     case JAVA_THREAD_STATE_TERMINATED : {
       assert(values_h->length() == 1 &&
                values_h->int_at(0) == java_lang_Thread::TERMINATED,
              "Invalid threadStatus value");
       objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
 , /* only 1 substate */
                                                CHECK_NULL);
       names_h = objArrayHandle(THREAD, r);
       Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
       names_h->obj_at_put(0, name());
       break;
     }
     default:
       // Unknown state - probably incompatible JDK version
       return NULL;
   }
   return (jobjectArray) JNIHandles::make_local(env, names_h());
 }
 JVM_END
 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
 {
   memset(info, 0, info_size);
   info->jvm_version = Abstract_VM_Version::jvm_version();
   info->update_version = 0;          /* 0 in HotSpot Express VM */
   info->special_update_version = 0;  /* 0 in HotSpot Express VM */
   // when we add a new capability in the jvm_version_info struct, we should also
   // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
   // counter defined in runtimeService.cpp.
   info->is_attachable = AttachListener::is_attach_supported();
 }
 JVM_END

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvm.cpp@fa9ea9d2801f (annotated)

src/share/vm/prims/jvm.cpp