view src/share/vm/prims/jvm.cpp @ 3996:f9eb431c3efe

8006005: Fix constant pool index validation and alignment trap for method parameter reflection Summary: This patch addresses an alignment trap due to the storage format of method parameters data in constMethod. It also adds code to validate constant pool indexes for method parameters data. Reviewed-by: jrose, dholmes Contributed-by: eric.mccorkle@oracle.com
author coleenp
date Mon, 14 Jan 2013 11:01:39 -0500
parents ade95d680b42
children f422634e5828 b14da2e6f2dc
line wrap: on
line source
/*
 * Copyright (c) 1997, 2012, 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/javaAssertions.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
#include "classfile/vmSymbols.hpp"
#include "gc_interface/collectedHeap.inline.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/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 "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_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, ...) {
      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);
    }
  }

  return properties;
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(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
  JVMWrapper("JVM_PrintStackTrace");
  // Note: This is no longer used in Merlin, but we still support it for compatibility.
  oop exception = JNIHandles::resolve_non_null(receiver);
  oop stream    = JNIHandles::resolve_non_null(printable);
  java_lang_Throwable::print_stack_trace(exception, stream);
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);
  }
  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 = NULL;
  if (obj->is_array()) {
    const int length = ((arrayOop)obj())->length();
    new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
  } else {
    new_obj = 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,
                               (size_t)align_object_size(size) / HeapWordsPerLong);
  // Clear the header
  new_obj->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, size));

  // 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 = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
  }

  return JNIHandles::make_local(env, oop(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");
  Klass* k = thread->security_get_caller_class(depth);
  return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
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


// 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

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


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);

  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;
  }

  Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
  objArrayOop signers = NULL;
  if (k->oop_is_instance()) {
    signers = InstanceKlass::cast(k)->signers();
  }

  // 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()) {
      InstanceKlass::cast(k)->set_signers(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;
  }

  Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
  return (jobject) JNIHandles::make_local(env, k->protection_domain());
JVM_END


// Obsolete since 1.2 (Class.setProtectionDomain removed), although
// still defined in core libraries as of 1.5.
JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
  JVMWrapper("JVM_SetProtectionDomain");
  if (JNIHandles::resolve(cls) == NULL) {
    THROW(vmSymbols::java_lang_NullPointerException());
  }
  if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
    // Call is ignored for primitive types
    Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));

    // cls won't be an array, as this called only from ClassLoader.defineClass
    if (k->oop_is_instance()) {
      oop pd = JNIHandles::resolve(protection_domain);
      assert(pd == NULL || pd->is_oop(), "just checking");
      InstanceKlass::cast(k)->set_protection_domain(pd);
    }
  }
JVM_END


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");
  }

  // Stack allocated list of privileged stack elements
  PrivilegedElement pi;

  // 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());
  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");
  }

  // 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()) {
    pi.initialize(&vfst, JNIHandles::resolve(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;

    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");
  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()) {
      typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
      return (jbyteArray) JNIHandles::make_local(env, a);
    }
  }
  return NULL;
JVM_END


JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
  assert(field != NULL, "illegal field");
  JVMWrapper("JVM_GetFieldAnnotations");

  // some of this code was adapted from from jni_FromReflectedField

  // field is a handle to a java.lang.reflect.Field object
  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);

  fieldDescriptor fd;
  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 NULL;  // robustness
    }
  } 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 NULL;  // robustness
    }
  }

  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);
  if (m == NULL) {
    assert(false, "cannot find method");
    return NULL;  // robustness
  }

  return m;
}


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);
  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);
  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);
  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()) {
      typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->type_annotations()->class_annotations(), CHECK_NULL);
      return (jbyteArray) JNIHandles::make_local(env, a);
    }
  }
  return NULL;
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* const sym = 0 != params[i].name_cp_index ?
        mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
      int flags = build_int_from_shorts(params[i].flags_lo, params[i].flags_hi);
      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.initialize(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

JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
{
  JVMWrapper("JVM_GetClassDeclaredMethods");
  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_Method_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();
  int num_methods = 0;

  int i;
  for (i = 0; i < methods_length; i++) {
    methodHandle method(THREAD, methods->at(i));
    if (!method->is_initializer()) {
      if (!publicOnly || method->is_public()) {
        ++num_methods;
      }
    }
  }

  // Allocate result
  objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
  objArrayHandle result (THREAD, r);

  int out_idx = 0;
  for (i = 0; i < methods_length; i++) {
    methodHandle method(THREAD, methods->at(i));
    if (!method->is_initializer()) {
      if (!publicOnly || method->is_public()) {
        oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
        result->obj_at_put(out_idx, m);
        ++out_idx;
      }
    }
  }
  assert(out_idx == num_methods, "just checking");
  return (jobjectArray) JNIHandles::make_local(env, result());
}
JVM_END

JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
{
  JVMWrapper("JVM_GetClassDeclaredConstructors");
  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_Constructor_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();
  int num_constructors = 0;

  int i;
  for (i = 0; i < methods_length; i++) {
    methodHandle method(THREAD, methods->at(i));
    if (method->is_initializer() && !method->is_static()) {
      if (!publicOnly || method->is_public()) {
        ++num_constructors;
      }
    }
  }

  // Allocate result
  objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
  objArrayHandle result(THREAD, r);

  int out_idx = 0;
  for (i = 0; i < methods_length; i++) {
    methodHandle method(THREAD, methods->at(i));
    if (method->is_initializer() && !method->is_static()) {
      if (!publicOnly || method->is_public()) {
        oop m = Reflection::new_constructor(method, CHECK_NULL);
        result->obj_at_put(out_idx, m);
        ++out_idx;
      }
    }
  }
  assert(out_idx == num_constructors, "just checking");
  return (jobjectArray) JNIHandles::make_local(env, result());
}
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_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:
    case JVM_CONSTANT_NameAndType:  // for invokedynamic
      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:
    case JVM_CONSTANT_NameAndType:  // for invokedynamic
      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, %Ld, %d)", fd, 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, %Ld)", fd, 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" {

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;
  return vsnprintf(str, count, fmt, args);
}


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;
}


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;
}


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);
  }
}


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 "]",
                        receiver, (address)java_thread, 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 */

  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) {
#ifndef USDT2
        HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
#else /* USDT2 */
        HOTSPOT_THREAD_SLEEP_END(
                                 1);
#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);
  }
#ifndef USDT2
  HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
#else /* USDT2 */
  HOTSPOT_THREAD_SLEEP_END(
                           0);
#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


// Utility object for collecting method holders walking down the stack
class KlassLink: public ResourceObj {
 public:
  KlassHandle klass;
  KlassLink*  next;

  KlassLink(KlassHandle k) { klass = k; next = NULL; }
};


JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
  JVMWrapper("JVM_GetClassContext");
  ResourceMark rm(THREAD);
  JvmtiVMObjectAllocEventCollector oam;
  // Collect linked list of (handles to) method holders
  KlassLink* first = NULL;
  KlassLink* last  = NULL;
  int depth = 0;

  for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
    // Native frames are not returned
    if (!vfst.method()->is_native()) {
      Klass* holder = vfst.method()->method_holder();
      assert(holder->is_klass(), "just checking");
      depth++;
      KlassLink* l = new KlassLink(KlassHandle(thread, holder));
      if (first == NULL) {
        first = last = l;
      } else {
        last->next = l;
        last = l;
      }
    }
  }

  // Create result array of type [Ljava/lang/Class;
  objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
  // Fill in mirrors corresponding to method holders
  int index = 0;
  while (first != NULL) {
    result->obj_at_put(index++, first->klass()->java_mirror());
    first = first->next;
  }
  assert(index == depth, "just checking");

  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"
  );
}


// Serialization
JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
                                            jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
  assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");

  typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
  typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
  typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
  oop          o      = JNIHandles::resolve(obj);

  if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
    THROW(vmSymbols::java_lang_NullPointerException());
  }

  jsize nfids = fids->length();
  if (nfids == 0) return;

  if (tcodes->length() < nfids) {
    THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
  }

  jsize off = 0;
  /* loop through fields, setting values */
  for (jsize i = 0; i < nfids; i++) {
    jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
    int field_offset;
    if (fid != NULL) {
      // NULL is a legal value for fid, but retrieving the field offset
      // trigger assertion in that case
      field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
    }

    switch (tcodes->char_at(i)) {
      case 'Z':
        if (fid != NULL) {
          jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
          o->bool_field_put(field_offset, val);
        }
        off++;
        break;

      case 'B':
        if (fid != NULL) {
          o->byte_field_put(field_offset, dbuf->byte_at(off));
        }
        off++;
        break;

      case 'C':
        if (fid != NULL) {
          jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
                    + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
          o->char_field_put(field_offset, val);
        }
        off += 2;
        break;

      case 'S':
        if (fid != NULL) {
          jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
                     + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
          o->short_field_put(field_offset, val);
        }
        off += 2;
        break;

      case 'I':
        if (fid != NULL) {
          jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
                    + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
                    + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
                    + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
          o->int_field_put(field_offset, ival);
        }
        off += 4;
        break;

      case 'F':
        if (fid != NULL) {
          jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
                    + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
                    + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
                    + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
          jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
          o->float_field_put(field_offset, fval);
        }
        off += 4;
        break;

      case 'J':
        if (fid != NULL) {
          jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
                     + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
                     + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
                     + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
                     + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
                     + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
                     + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
                     + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
          o->long_field_put(field_offset, lval);
        }
        off += 8;
        break;

      case 'D':
        if (fid != NULL) {
          jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
                     + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
                     + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
                     + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
                     + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
                     + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
                     + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
                     + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
          jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
          o->double_field_put(field_offset, dval);
        }
        off += 8;
        break;

      default:
        // Illegal typecode
        THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
    }
  }
JVM_END


JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
                            jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
  assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");

  typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
  typeArrayOop dbuf   = typeArrayOop(JNIHandles::resolve(data));
  typeArrayOop fids   = typeArrayOop(JNIHandles::resolve(fieldIDs));
  oop          o      = JNIHandles::resolve(obj);

  if (o == NULL || fids == NULL  || dbuf == NULL  || tcodes == NULL) {
    THROW(vmSymbols::java_lang_NullPointerException());
  }

  jsize nfids = fids->length();
  if (nfids == 0) return;

  if (tcodes->length() < nfids) {
    THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
  }

  /* loop through fields, fetching values */
  jsize off = 0;
  for (jsize i = 0; i < nfids; i++) {
    jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
    if (fid == NULL) {
      THROW(vmSymbols::java_lang_NullPointerException());
    }
    int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);

     switch (tcodes->char_at(i)) {
       case 'Z':
         {
           jboolean val = o->bool_field(field_offset);
           dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
         }
         break;

       case 'B':
         dbuf->byte_at_put(off++, o->byte_field(field_offset));
         break;

       case 'C':
         {
           jchar val = o->char_field(field_offset);
           dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
         }
         break;

       case 'S':
         {
           jshort val = o->short_field(field_offset);
           dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
         }
         break;

       case 'I':
         {
           jint val = o->int_field(field_offset);
           dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
           dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
         }
         break;

       case 'F':
         {
           jfloat fval = o->float_field(field_offset);
           jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
           dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
           dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
           dbuf->byte_at_put(off++, (ival >> 8)  & 0xFF);
           dbuf->byte_at_put(off++, (ival >> 0)  & 0xFF);
         }
         break;

       case 'J':
         {
           jlong val = o->long_field(field_offset);
           dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
           dbuf->byte_at_put(off++, (val >> 8)  & 0xFF);
           dbuf->byte_at_put(off++, (val >> 0)  & 0xFF);
         }
         break;

       case 'D':
         {
           jdouble dval = o->double_field(field_offset);
           jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
           dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 8)  & 0xFF);
           dbuf->byte_at_put(off++, (lval >> 0)  & 0xFF);
         }
         break;

       default:
         // Illegal typecode
         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
     }
  }
JVM_END


// 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.
  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, 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, 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(),
                                               1, /* 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(),
                                               1, /* 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(),
                                               1, /* 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(),
                                               2, /* 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(),
                                               3, /* 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(),
                                               1, /* 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, sizeof(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();
#ifdef KERNEL
  info->is_kernel_jvm = 1; // true;
#else  // KERNEL
  info->is_kernel_jvm = 0; // false;
#endif // KERNEL
}
JVM_END