natclass.cc

gcc的组建

  return result;
}

jstring
java::lang::Class::getName (void)
{
  return name->toString();
}

JArray<jclass> *
java::lang::Class::getDeclaredClasses (jboolean /*publicOnly*/)
{
  // Until we have inner classes, it always makes sense to return an
  // empty array.
  JArray<jclass> *result
    = (JArray<jclass> *) JvNewObjectArray (0, &java::lang::Class::class$,
					   NULL);
  return result;
}

jclass
java::lang::Class::getDeclaringClass (void)
{
  // Until we have inner classes, it makes sense to always return
  // NULL.
  return NULL;
}

JArray<jclass> *
java::lang::Class::getInterfaces (void)
{
  jobjectArray r = JvNewObjectArray (interface_count, getClass (), NULL);
  jobject *data = elements (r);
  for (int i = 0; i < interface_count; ++i)
    {
      typedef unsigned int uaddr __attribute__ ((mode (pointer)));
      data[i] = interfaces[i];
      if ((uaddr)data[i] < (uaddr)constants.size)
	fprintf (stderr, "ERROR !!!\n");
    }
  return reinterpret_cast<JArray<jclass> *> (r);
}

java::lang::reflect::Method *
java::lang::Class::_getMethod (jstring name, JArray<jclass> *param_types)
{
  jstring partial_sig = getSignature (param_types, false);
  jint p_len = partial_sig->length();
  _Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);

   for (Class *klass = this; klass; klass = klass->getSuperclass())
    {
      int i = klass->isPrimitive () ? 0 : klass->method_count;
      while (--i >= 0)
	{
	  if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
	      && _Jv_equaln (klass->methods[i].signature, partial_sig, p_len)
	      && (klass->methods[i].accflags
		  & java::lang::reflect::Modifier::INVISIBLE) == 0)
	    {
	      // Found it.
	      using namespace java::lang::reflect;

	      // Method must be public.
	      if (! Modifier::isPublic (klass->methods[i].accflags))
		break;

	      Method *rmethod = new Method ();
	      rmethod->offset = ((char *) (&klass->methods[i])
				 - (char *) klass->methods);
	      rmethod->declaringClass = klass;
	      return rmethod;
	    }
	}
    }

  // If we haven't found a match, and this class is an interface, then
  // check all the superinterfaces.
  if (isInterface())
    {
      for (int i = 0; i < interface_count; ++i)
	{
	  using namespace java::lang::reflect;
	  Method *rmethod = interfaces[i]->_getMethod (name, param_types);
	  if (rmethod != NULL)
	    return rmethod;
	}
    }

  return NULL;
}

// This is a very slow implementation, since it re-scans all the
// methods we've already listed to make sure we haven't duplicated a
// method.  It also over-estimates the required size, so we have to
// shrink the result array later.
jint
java::lang::Class::_getMethods (JArray<java::lang::reflect::Method *> *result,
				jint offset)
{
  jint count = 0;

  // First examine all local methods
  for (int i = isPrimitive () ? 0 : method_count; --i >= 0; )
    {
      _Jv_Method *method = &methods[i];
      if (method->name == NULL
	  || _Jv_equalUtf8Consts (method->name, clinit_name)
	  || _Jv_equalUtf8Consts (method->name, init_name)
	  || _Jv_equalUtf8Consts (method->name, finit_name)
	  || (method->accflags
	      & java::lang::reflect::Modifier::INVISIBLE) != 0)
	continue;
      // Only want public methods.
      if (! java::lang::reflect::Modifier::isPublic (method->accflags))
	continue;

      // This is where we over-count the slots required if we aren't
      // filling the result for real.
      if (result != NULL)
	{
	  jboolean add = true;
	  java::lang::reflect::Method **mp = elements (result);
	  // If we already have a method with this name and signature,
	  // then ignore this one.  This can happen with virtual
	  // methods.
	  for (int j = 0; j < offset; ++j)
	    {
	      _Jv_Method *meth_2 = _Jv_FromReflectedMethod (mp[j]);
	      if (_Jv_equalUtf8Consts (method->name, meth_2->name)
		  && _Jv_equalUtf8Consts (method->signature,
					  meth_2->signature))
		{
		  add = false;
		  break;
		}
	    }
	  if (! add)
	    continue;
	}

      if (result != NULL)
	{
	  using namespace java::lang::reflect;
	  Method *rmethod = new Method ();
	  rmethod->offset = (char *) method - (char *) methods;
	  rmethod->declaringClass = this;
	  Method **mp = elements (result);
	  mp[offset + count] = rmethod;
	}
      ++count;
    }
  offset += count;

  // Now examine superclasses.
  if (getSuperclass () != NULL)
    {
      jint s_count = getSuperclass()->_getMethods (result, offset);
      offset += s_count;
      count += s_count;
    }

  // Finally, examine interfaces.
  for (int i = 0; i < interface_count; ++i)
    {
      int f_count = interfaces[i]->_getMethods (result, offset);
      count += f_count;
      offset += f_count;
    }

  return count;
}

JArray<java::lang::reflect::Method *> *
java::lang::Class::getMethods (void)
{
  using namespace java::lang::reflect;

  memberAccessCheck(Member::PUBLIC);

  // This will overestimate the size we need.
  jint count = _getMethods (NULL, 0);

  JArray<Method *> *result
    = ((JArray<Method *> *) JvNewObjectArray (count,
					      &Method::class$,
					      NULL));

  // When filling the array for real, we get the actual count.  Then
  // we resize the array.
  jint real_count = _getMethods (result, 0);

  if (real_count != count)
    {
      JArray<Method *> *r2
	= ((JArray<Method *> *) JvNewObjectArray (real_count,
						  &Method::class$,
						  NULL));
      
      Method **destp = elements (r2);
      Method **srcp = elements (result);

      for (int i = 0; i < real_count; ++i)
	*destp++ = *srcp++;

      result = r2;
    }

  return result;
}

jboolean
java::lang::Class::isAssignableFrom (jclass klass)
{
  // Arguments may not have been initialized, given ".class" syntax.
  _Jv_InitClass (this);
  _Jv_InitClass (klass);
  return _Jv_IsAssignableFrom (klass, this);
}

jboolean
java::lang::Class::isInstance (jobject obj)
{
  if (! obj)
    return false;
  _Jv_InitClass (this);
  return _Jv_IsAssignableFrom (JV_CLASS (obj), this);
}

jobject
java::lang::Class::newInstance (void)
{
  memberAccessCheck(java::lang::reflect::Member::PUBLIC);

  if (isPrimitive ()
      || isInterface ()
      || isArray ()
      || java::lang::reflect::Modifier::isAbstract(accflags))
    throw new java::lang::InstantiationException (getName ());

  _Jv_InitClass (this);

  _Jv_Method *meth = _Jv_GetMethodLocal (this, init_name, void_signature);
  if (! meth)
    throw new java::lang::InstantiationException (getName());

  jobject r = _Jv_AllocObject (this);
  ((void (*) (jobject)) meth->ncode) (r);
  return r;
}

void
java::lang::Class::finalize (void)
{
  engine->unregister(this);
}

// This implements the initialization process for a class.  From Spec
// section 12.4.2.
void
java::lang::Class::initializeClass (void)
{
  // Short-circuit to avoid needless locking.
  if (state == JV_STATE_DONE)
    return;

  // Step 1.  We introduce a new scope so we can synchronize more
  // easily.
  {
    JvSynchronize sync (this);

    if (state < JV_STATE_LINKED)
      {
	try
	  {
	    _Jv_Linker::wait_for_state(this, JV_STATE_LINKED);
	  }
	catch (java::lang::Throwable *x)
	  {
	    // Turn into a NoClassDefFoundError.
	    java::lang::NoClassDefFoundError *result
	      = new java::lang::NoClassDefFoundError(getName());
	    result->initCause(x);
	    throw result;
	  }
      }

    // Step 2.
    java::lang::Thread *self = java::lang::Thread::currentThread();
    self = (java::lang::Thread *) ((long) self | 1);
    while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
      wait ();

    // Steps 3 &  4.
    if (state == JV_STATE_DONE || state == JV_STATE_IN_PROGRESS)
      return;

    // Step 5.
    if (state == JV_STATE_ERROR)
      throw new java::lang::NoClassDefFoundError (getName());

    // Step 6.
    thread = self;
    _Jv_Linker::wait_for_state (this, JV_STATE_LINKED);
    state = JV_STATE_IN_PROGRESS;
  }

  // Step 7.
  if (! isInterface () && superclass)
    {
      try
	{
	  _Jv_InitClass (superclass);
	}
      catch (java::lang::Throwable *except)
	{
	  // Caught an exception.
	  JvSynchronize sync (this);
	  state = JV_STATE_ERROR;
	  notifyAll ();
	  throw except;
	}
    }

  // Steps 8, 9, 10, 11.
  try
    {
      _Jv_Method *meth = _Jv_GetMethodLocal (this, clinit_name,
					     void_signature);
      if (meth)
	((void (*) (void)) meth->ncode) ();
    }
  catch (java::lang::Throwable *except)
    {
      if (! java::lang::Error::class$.isInstance(except))
	{
	  try
	    {
	      except = new ExceptionInInitializerError (except);
	    }
	  catch (java::lang::Throwable *t)
	    {
	      except = t;
	    }
	}

      JvSynchronize sync (this);
      state = JV_STATE_ERROR;
      notifyAll ();
      throw except;
    }

  JvSynchronize sync (this);
  state = JV_STATE_DONE;
  notifyAll ();
}

// Only used by serialization
java::lang::reflect::Field *
java::lang::Class::getPrivateField (jstring name)
{
  int hash = name->hashCode ();

  java::lang::reflect::Field* rfield;
  for (int i = 0;  i < field_count;  i++)
    {
      _Jv_Field *field = &fields[i];
      if (! _Jv_equal (field->name, name, hash))
	continue;
      rfield = new java::lang::reflect::Field ();
      rfield->offset = (char*) field - (char*) fields;
      rfield->declaringClass = this;
      rfield->name = name;
      return rfield;
    }
  jclass superclass = getSuperclass();
  if (superclass == NULL)
    return NULL;
  rfield = superclass->getPrivateField(name);
  for (int i = 0; i < interface_count && rfield == NULL; ++i)
    rfield = interfaces[i]->getPrivateField (name);
  return rfield;
}

// Only used by serialization
java::lang::reflect::Method *
java::lang::Class::getPrivateMethod (jstring name, JArray<jclass> *param_types)
{
  jstring partial_sig = getSignature (param_types, false);
  jint p_len = partial_sig->length();
  _Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
  for (Class *klass = this; klass; klass = klass->getSuperclass())
    {
      int i = klass->isPrimitive () ? 0 : klass->method_count;
      while (--i >= 0)
	{
	  if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
	      && _Jv_equaln (klass->methods[i].signature, partial_sig, p_len))
	    {
	      // Found it.
	      using namespace java::lang::reflect;

	      Method *rmethod = new Method ();
	      rmethod->offset = ((char *) (&klass->methods[i])
				 - (char *) klass->methods);
	      rmethod->declaringClass = klass;
	      return rmethod;
	    }