C++ PyErr_Restore函数代码示例

static struct value *
fnpy_call (struct gdbarch *gdbarch, const struct language_defn *language,
	   void *cookie, int argc, struct value **argv)
{
  struct value *value = NULL;
  /* 'result' must be set to NULL, this initially indicates whether
     the function was called, or not.  */
  PyObject *result = NULL;
  PyObject *callable, *args;
  struct cleanup *cleanup;

  cleanup = ensure_python_env (gdbarch, language);

  args = convert_values_to_python (argc, argv);
  /* convert_values_to_python can return NULL on error.  If we
     encounter this, do not call the function, but allow the Python ->
     error code conversion below to deal with the Python exception.
     Note, that this is different if the function simply does not
     have arguments.  */

  if (args)
    {
      callable = PyObject_GetAttrString ((PyObject *) cookie, "invoke");
      if (! callable)
	{
	  Py_DECREF (args);
	  error (_("No method named 'invoke' in object."));
	}

      result = PyObject_Call (callable, args, NULL);
      Py_DECREF (callable);
      Py_DECREF (args);
    }

  if (!result)
    {
      PyObject *ptype, *pvalue, *ptraceback;
      char *msg;

      PyErr_Fetch (&ptype, &pvalue, &ptraceback);

      /* Try to fetch an error message contained within ptype, pvalue.
	 When fetching the error message we need to make our own copy,
	 we no longer own ptype, pvalue after the call to PyErr_Restore.  */

      msg = gdbpy_exception_to_string (ptype, pvalue);
      make_cleanup (xfree, msg);

      if (msg == NULL)
	{
	  /* An error occurred computing the string representation of the
	     error message.  This is rare, but we should inform the user.  */

	  printf_filtered (_("An error occurred in a Python "
			     "convenience function\n"
			     "and then another occurred computing the "
			     "error message.\n"));
	  gdbpy_print_stack ();
	}

      /* Don't print the stack for gdb.GdbError exceptions.
	 It is generally used to flag user errors.

	 We also don't want to print "Error occurred in Python command"
	 for user errors.  However, a missing message for gdb.GdbError
	 exceptions is arguably a bug, so we flag it as such.  */

      if (!PyErr_GivenExceptionMatches (ptype, gdbpy_gdberror_exc)
	  || msg == NULL || *msg == '\0')
	{
	  PyErr_Restore (ptype, pvalue, ptraceback);
	  gdbpy_print_stack ();
	  if (msg != NULL && *msg != '\0')
	    error (_("Error occurred in Python convenience function: %s"),
		   msg);
	  else
	    error (_("Error occurred in Python convenience function."));
	}
      else
	{
	  Py_XDECREF (ptype);
	  Py_XDECREF (pvalue);
	  Py_XDECREF (ptraceback);
	  error ("%s", msg);
	}
    }

  value = convert_value_from_python (result);
  if (value == NULL)
    {
      Py_DECREF (result);
      gdbpy_print_stack ();
      error (_("Error while executing Python code."));
    }

  Py_DECREF (result);
  do_cleanups (cleanup);

  return value;
}

static void JNICALL _PythonException_getErrorInfo(JNIEnv *vm_env, jobject self)
{
    PythonGIL gil(vm_env);

    if (!PyErr_Occurred())
        return;

    PyObject *type, *value, *tb, *errorName;
    jclass jcls = vm_env->GetObjectClass(self);

    PyErr_Fetch(&type, &value, &tb);

    errorName = PyObject_GetAttrString(type, "__name__");
    if (errorName != NULL)
    {
        jfieldID fid =
            vm_env->GetFieldID(jcls, "errorName", "Ljava/lang/String;");
        jstring str = env->fromPyString(errorName);

        vm_env->SetObjectField(self, fid, str);
        vm_env->DeleteLocalRef(str);
        Py_DECREF(errorName);
    }

    if (value != NULL)
    {
        PyObject *message = PyObject_Str(value);

        if (message != NULL)
        {
            jfieldID fid =
                vm_env->GetFieldID(jcls, "message", "Ljava/lang/String;");
            jstring str = env->fromPyString(message);

            vm_env->SetObjectField(self, fid, str);
            vm_env->DeleteLocalRef(str);
            Py_DECREF(message);
        }
    }

    PyObject *module = NULL, *cls = NULL, *stringIO = NULL, *result = NULL;
    PyObject *_stderr = PySys_GetObject("stderr");
    if (!_stderr)
        goto err;

    module = PyImport_ImportModule("cStringIO");
    if (!module)
        goto err;

    cls = PyObject_GetAttrString(module, "StringIO");
    Py_DECREF(module);
    if (!cls)
        goto err;

    stringIO = PyObject_CallObject(cls, NULL);
    Py_DECREF(cls);
    if (!stringIO)
        goto err;

    Py_INCREF(_stderr);
    PySys_SetObject("stderr", stringIO);

    PyErr_Restore(type, value, tb);
    PyErr_Print();

    result = PyObject_CallMethod(stringIO, "getvalue", NULL);
    Py_DECREF(stringIO);

    if (result != NULL)
    {
        jfieldID fid =
            vm_env->GetFieldID(jcls, "traceback", "Ljava/lang/String;");
        jstring str = env->fromPyString(result);

        vm_env->SetObjectField(self, fid, str);
        vm_env->DeleteLocalRef(str);
        Py_DECREF(result);
    }

    PySys_SetObject("stderr", _stderr);
    Py_DECREF(_stderr);

    return;

  err:
    PyErr_Restore(type, value, tb);
}

static int GREENLET_NOINLINE(g_initialstub)(void* mark)
{
	int err;
	PyObject *o, *run;
	PyObject *exc, *val, *tb;
	PyGreenlet* self = ts_target;
	PyObject* args = ts_passaround_args;
	PyObject* kwargs = ts_passaround_kwargs;

	/* save exception in case getattr clears it */
	PyErr_Fetch(&exc, &val, &tb);
	/* self.run is the object to call in the new greenlet */
	run = PyObject_GetAttrString((PyObject*) self, "run");
	if (run == NULL) {
		Py_XDECREF(exc);
		Py_XDECREF(val);
		Py_XDECREF(tb);
		return -1;
	}
	/* restore saved exception */
	PyErr_Restore(exc, val, tb);

	/* recheck the state in case getattr caused thread switches */
	if (!STATE_OK) {
		Py_DECREF(run);
		return -1;
	}

	/* by the time we got here another start could happen elsewhere,
	 * that means it should now be a regular switch
	 */
	if (PyGreenlet_STARTED(self)) {
		Py_DECREF(run);
		ts_passaround_args = args;
		ts_passaround_kwargs = kwargs;
		return 1;
	}
	/* restore arguments in case they are clobbered */
	ts_target = self;
	ts_passaround_args = args;
	ts_passaround_kwargs = kwargs;

	/* now use run_info to store the statedict */
	o = self->run_info;
	self->run_info = green_statedict(self->parent);
	Py_INCREF(self->run_info);
	Py_XDECREF(o);

	/* start the greenlet */
	self->stack_start = NULL;
	self->stack_stop = (char*) mark;
	if (ts_current->stack_start == NULL) {
		/* ts_current is dying */
		self->stack_prev = ts_current->stack_prev;
	}
	else {
		self->stack_prev = ts_current;
	}
	self->top_frame = NULL;
	self->exc_type = NULL;
	self->exc_value = NULL;
	self->exc_traceback = NULL;
	self->recursion_depth = PyThreadState_GET()->recursion_depth;
	err = g_switchstack();
	/* returns twice!
	   The 1st time with err=1: we are in the new greenlet
	   The 2nd time with err=0: back in the caller's greenlet
	*/
	if (err == 1) {
		/* in the new greenlet */
		PyObject* result;
		PyGreenlet* parent;
		self->stack_start = (char*) 1;  /* running */

		if (args == NULL) {
			/* pending exception */
			result = NULL;
		} else {
			/* call g.run(*args, **kwargs) */
			result = PyEval_CallObjectWithKeywords(
				run, args, kwargs);
			Py_DECREF(args);
			Py_XDECREF(kwargs);
		}
		Py_DECREF(run);
		result = g_handle_exit(result);

		/* jump back to parent */
		self->stack_start = NULL;  /* dead */
		for (parent = self->parent; parent != NULL; parent = parent->parent) {
			result = g_switch(parent, result, NULL);
			/* Return here means switch to parent failed,
			 * in which case we throw *current* exception
			 * to the next parent in chain.
			 */
		}
		/* We ran out of parents, cannot continue */
		PyErr_WriteUnraisable((PyObject *) self);
		Py_FatalError("greenlets cannot continue");
	}
//.........这里部分代码省略.........

void DataSourceWrapper::GetRow(StringList& row, const String& table, int row_index, const StringList& columns)
{
	PyObject* callable = PyObject_GetAttrString(self, "GetRow");
	if (!callable)
	{
		Core::String error_message(128, "Function \"GetRow\" not found on python data source %s.", Utilities::GetPythonClassName(self).CString());
		Log::Message(LC_COREPYTHON, Log::LT_WARNING, "%s", error_message.CString());
		PyErr_SetString(PyExc_RuntimeError, error_message.CString());
		python::throw_error_already_set();
		return;
	}

	python::tuple t = python::make_tuple(table.CString(), row_index, columns);
	PyObject* result = PyObject_CallObject(callable, t.ptr());
	Py_DECREF(callable);	

	// If it's a list, then just get the entries out of it
	if (result && PyList_Check(result))
	{
		int num_entries = PyList_Size(result);
		for (int i = 0; i < num_entries; i++)
		{
			Core::String entry;

			PyObject* entry_object = PyList_GetItem(result, i);
			if (PyString_Check(entry_object))
			{
				entry = PyString_AS_STRING(entry_object);
			}
			else if (PyInt_Check(entry_object))
			{
				int entry_int = (int)PyInt_AS_LONG(entry_object);
				Core::TypeConverter< int, Core::String >::Convert(entry_int, entry);
			}
			else if (PyFloat_Check(entry_object))
			{
				float entry_float = (float)PyFloat_AS_DOUBLE(entry_object);
				Core::TypeConverter< float, Core::String >::Convert(entry_float, entry);
			}
			else
			{
				Core::String error_message(128, "Failed to convert row %d entry %d on data source %s.", row_index, i, Utilities::GetPythonClassName(self).CString());
				Log::Message(LC_COREPYTHON, Log::LT_WARNING, "%s", error_message.CString());
				PyErr_SetString(PyExc_RuntimeError, error_message.CString());
				python::throw_error_already_set();
			}

			row.push_back(entry);
		}
	}
	else
	{
		// Print the error and restore it to the caller
		PyObject *type, *value, *traceback;
		PyErr_Fetch(&type, &value, &traceback);
		Py_XINCREF(type);
		Py_XINCREF(value);
		Py_XINCREF(traceback);

		Core::String error_message(128, "Failed to get entries for table %s row %d from python data source %s.", table.CString(), row_index, Utilities::GetPythonClassName(self).CString());
		Log::Message(LC_COREPYTHON, Log::LT_WARNING, "%s", error_message.CString());
		if (type == NULL)
			PyErr_SetString(PyExc_RuntimeError, error_message.CString());
		else
			PyErr_Restore(type, value, traceback);

		python::throw_error_already_set();
	}

	if (result)
		Py_DECREF(result);
}

void
PyErr_Clear(void)
{
    PyErr_Restore(NULL, NULL, NULL);
}

//.........这里部分代码省略.........
        if ((resobj = PyEval_CallObject(sfunc, sa)) != NULL)
        {
            Py_DECREF(sfunc);
            Py_XDECREF(sref);

            /* Remove any previous exception. */

            if (sa != sigargs)
            {
                Py_XDECREF(oxtype);
                Py_XDECREF(oxvalue);
                Py_XDECREF(oxtb);
                PyErr_Clear();
            }

            Py_DECREF(sa);

            return resobj;
        }

        /* Get the exception. */
        PyErr_Fetch(&xtype,&xvalue,&xtb);

        /*
         * See if it is unacceptable.  An acceptable failure is a type error
         * with no traceback - so long as we can still reduce the number of
         * arguments and try again.
         */
        if (!PyErr_GivenExceptionMatches(xtype,PyExc_TypeError) ||
            xtb != NULL ||
            PyTuple_GET_SIZE(sa) == 0)
        {
            /*
             * If there is a traceback then we must have called the slot and
             * the exception was later on - so report the exception as is.
             */
            if (xtb != NULL)
            {
                if (sa != sigargs)
                {
                    Py_XDECREF(oxtype);
                    Py_XDECREF(oxvalue);
                    Py_XDECREF(oxtb);
                }

                PyErr_Restore(xtype,xvalue,xtb);
            }
            else if (sa == sigargs)
                PyErr_Restore(xtype,xvalue,xtb);
            else
            {
                /*
                 * Discard the latest exception and restore the original one.
                 */
                Py_XDECREF(xtype);
                Py_XDECREF(xvalue);
                Py_XDECREF(xtb);

                PyErr_Restore(oxtype,oxvalue,oxtb);
            }

            break;
        }

        /* If this is the first attempt, save the exception. */
        if (sa == sigargs)
        {
            oxtype = xtype;
            oxvalue = xvalue;
            oxtb = xtb;
        }
        else
        {
            Py_XDECREF(xtype);
            Py_XDECREF(xvalue);
            Py_XDECREF(xtb);
        }

        /* Create the new argument tuple. */
        if ((nsa = PyTuple_GetSlice(sa,0,PyTuple_GET_SIZE(sa) - 1)) == NULL)
        {
            /* Tidy up. */
            Py_XDECREF(oxtype);
            Py_XDECREF(oxvalue);
            Py_XDECREF(oxtb);

            break;
        }

        Py_DECREF(sa);
        sa = nsa;
    }

    Py_DECREF(sfunc);
    Py_XDECREF(sref);

    Py_DECREF(sa);

    return NULL;
}

static void
err_input(perrdetail *err)
{
	PyObject *v, *w, *errtype;
	char *msg = NULL;
	errtype = PyExc_SyntaxError;
	v = Py_BuildValue("(ziiz)", err->filename,
			    err->lineno, err->offset, err->text);
	if (err->text != NULL) {
		PyMem_DEL(err->text);
		err->text = NULL;
	}
	switch (err->error) {
	case E_SYNTAX:
		errtype = PyExc_IndentationError;
		if (err->expected == INDENT)
			msg = "expected an indented block";
		else if (err->token == INDENT)
			msg = "unexpected indent";
		else if (err->token == DEDENT)
			msg = "unexpected unindent";
		else {
			errtype = PyExc_SyntaxError;
			msg = "invalid syntax";
		}
		break;
	case E_TOKEN:
		msg = "invalid token";
		break;
	case E_INTR:
		PyErr_SetNone(PyExc_KeyboardInterrupt);
		Py_XDECREF(v);
		return;
	case E_NOMEM:
		PyErr_NoMemory();
		Py_XDECREF(v);
		return;
	case E_EOF:
		msg = "unexpected EOF while parsing";
		break;
	case E_TABSPACE:
		errtype = PyExc_TabError;
		msg = "inconsistent use of tabs and spaces in indentation";
		break;
	case E_OVERFLOW:
		msg = "expression too long";
		break;
	case E_DEDENT:
		errtype = PyExc_IndentationError;
		msg = "unindent does not match any outer indentation level";
		break;
	case E_TOODEEP:
		errtype = PyExc_IndentationError;
		msg = "too many levels of indentation";
		break;
	default:
		fprintf(stderr, "error=%d\n", err->error);
		msg = "unknown parsing error";
		break;
	}
	w = Py_BuildValue("(sO)", msg, v);
	PyErr_SetObject(errtype, w);
	Py_XDECREF(w);

	if (v != NULL) {
		PyObject *exc, *tb;

		PyErr_Fetch(&errtype, &exc, &tb);
		PyErr_NormalizeException(&errtype, &exc, &tb);
		if (PyObject_SetAttrString(exc, "filename",
					   PyTuple_GET_ITEM(v, 0)))
			PyErr_Clear();
		if (PyObject_SetAttrString(exc, "lineno",
					   PyTuple_GET_ITEM(v, 1)))
			PyErr_Clear();
		if (PyObject_SetAttrString(exc, "offset",
					   PyTuple_GET_ITEM(v, 2)))
			PyErr_Clear();
		Py_DECREF(v);
		PyErr_Restore(errtype, exc, tb);
	}
}

static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause) {
    PyObject* owned_instance = NULL;
    if (tb == Py_None) {
        tb = 0;
    } else if (tb && !PyTraceBack_Check(tb)) {
        PyErr_SetString(PyExc_TypeError,
            "raise: arg 3 must be a traceback or None");
        goto bad;
    }
    if (value == Py_None)
        value = 0;

    if (PyExceptionInstance_Check(type)) {
        if (value) {
            PyErr_SetString(PyExc_TypeError,
                "instance exception may not have a separate value");
            goto bad;
        }
        value = type;
        type = (PyObject*) Py_TYPE(value);
    } else if (PyExceptionClass_Check(type)) {
        // make sure value is an exception instance of type
        PyObject *instance_class = NULL;
        if (value && PyExceptionInstance_Check(value)) {
            instance_class = (PyObject*) Py_TYPE(value);
            if (instance_class != type) {
                int is_subclass = PyObject_IsSubclass(instance_class, type);
                if (!is_subclass) {
                    instance_class = NULL;
                } else if (unlikely(is_subclass == -1)) {
                    // error on subclass test
                    goto bad;
                } else {
                    // believe the instance
                    type = instance_class;
                }
            }
        }
        if (!instance_class) {
            // instantiate the type now (we don't know when and how it will be caught)
            // assuming that 'value' is an argument to the type's constructor
            // not using PyErr_NormalizeException() to avoid ref-counting problems
            PyObject *args;
            if (!value)
                args = PyTuple_New(0);
            else if (PyTuple_Check(value)) {
                Py_INCREF(value);
                args = value;
            } else
                args = PyTuple_Pack(1, value);
            if (!args)
                goto bad;
            owned_instance = PyObject_Call(type, args, NULL);
            Py_DECREF(args);
            if (!owned_instance)
                goto bad;
            value = owned_instance;
            if (!PyExceptionInstance_Check(value)) {
                PyErr_Format(PyExc_TypeError,
                             "calling %R should have returned an instance of "
                             "BaseException, not %R",
                             type, Py_TYPE(value));
                goto bad;
            }
        }
    } else {
        PyErr_SetString(PyExc_TypeError,
            "raise: exception class must be a subclass of BaseException");
        goto bad;
    }

    if (cause) {
        PyObject *fixed_cause;
        if (cause == Py_None) {
            // raise ... from None
            fixed_cause = NULL;
        } else if (PyExceptionClass_Check(cause)) {
            fixed_cause = PyObject_CallObject(cause, NULL);
            if (fixed_cause == NULL)
                goto bad;
        } else if (PyExceptionInstance_Check(cause)) {
            fixed_cause = cause;
            Py_INCREF(fixed_cause);
        } else {
            PyErr_SetString(PyExc_TypeError,
                            "exception causes must derive from "
                            "BaseException");
            goto bad;
        }
        PyException_SetCause(value, fixed_cause);
    }

    PyErr_SetObject(type, value);

    if (tb) {
#if CYTHON_COMPILING_IN_PYPY
        PyObject *tmp_type, *tmp_value, *tmp_tb;
        PyErr_Fetch(&tmp_type, &tmp_value, &tmp_tb);
        Py_INCREF(tb);
        PyErr_Restore(tmp_type, tmp_value, tb);
//.........这里部分代码省略.........

/* This function is called by the tp_dealloc handler to clear weak references.
 *
 * This iterates through the weak references for 'object' and calls callbacks
 * for those references which have one.  It returns when all callbacks have
 * been attempted.
 */
void
PyObject_ClearWeakRefs(PyObject *object)
{
    PyWeakReference **list;

    if (object == NULL
        || !PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))
        //|| object->ob_refcnt != 0
        ) {
        PyErr_BadInternalCall();
        return;
    }
    list = GET_WEAKREFS_LISTPTR(object);
    /* Remove the callback-less basic and proxy references */
    if (*list != NULL && (*list)->wr_callback == NULL) {
        clear_weakref(*list);
        if (*list != NULL && (*list)->wr_callback == NULL)
            clear_weakref(*list);
    }
    if (*list != NULL) {
        PyWeakReference *current = *list;
        Py_ssize_t count = _PyWeakref_GetWeakrefCount(current);
        int restore_error = PyErr_Occurred() ? 1 : 0;
        PyObject *err_type, *err_value, *err_tb;

        if (restore_error)
            PyErr_Fetch(&err_type, &err_value, &err_tb);
        if (count == 1) {
            PyObject *callback = current->wr_callback;

            current->wr_callback = NULL;
            clear_weakref(current);
            if (callback != NULL) {
                // Pyston change:
                // current is a stack reference to a GC allocated object.  If it wasn't null when we fetched it from *list, it won't
                // be collected, and we can trust that it's still valid here.
                if (true /*current->ob_refcnt > 0*/)
                    handle_callback(current, callback);
                Py_DECREF(callback);
            }
        }
        else {
            PyObject *tuple;
            Py_ssize_t i = 0;

            tuple = PyTuple_New(count * 2);
            if (tuple == NULL) {
                if (restore_error)
                    PyErr_Fetch(&err_type, &err_value, &err_tb);
                return;
            }

            for (i = 0; i < count; ++i) {
                PyWeakReference *next = current->wr_next;

                // Pyston change:
                // current is a stack reference to a GC allocated object.  If it wasn't null when we fetched it from *list, it won't
                // be collected, and we can trust that it's still valid here.
                if (true /*current->ob_refcnt > 0*/)
                {
                    Py_INCREF(current);
                    PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
                    PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
                }
                else {
                    Py_DECREF(current->wr_callback);
                }
                current->wr_callback = NULL;
                clear_weakref(current);
                current = next;
            }
            for (i = 0; i < count; ++i) {
                PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1);

                /* The tuple may have slots left to NULL */
                if (callback != NULL) {
                    PyObject *item = PyTuple_GET_ITEM(tuple, i * 2);
                    handle_callback((PyWeakReference *)item, callback);
                }
            }
            Py_DECREF(tuple);
        }
        if (restore_error)
            PyErr_Restore(err_type, err_value, err_tb);
    }
}

//.........这里部分代码省略.........
      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":67 */
      __pyx_3 = (__pyx_v_ieconfig.lpszAutoConfigUrl != 0);
      if (__pyx_3) {
        __pyx_2 = _fromWideChar(__pyx_v_ieconfig.lpszAutoConfigUrl); if (!__pyx_2) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 68; goto __pyx_L4;}
        Py_DECREF(__pyx_v_ret->autoconfigurl);
        __pyx_v_ret->autoconfigurl = __pyx_2;
        __pyx_2 = 0;
        goto __pyx_L6;
      }
      __pyx_L6:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":69 */
      __pyx_3 = (__pyx_v_ieconfig.lpszProxy != 0);
      if (__pyx_3) {
        __pyx_2 = _fromWideChar(__pyx_v_ieconfig.lpszProxy); if (!__pyx_2) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 70; goto __pyx_L4;}
        Py_DECREF(__pyx_v_ret->proxy);
        __pyx_v_ret->proxy = __pyx_2;
        __pyx_2 = 0;
        goto __pyx_L7;
      }
      __pyx_L7:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":71 */
      __pyx_3 = (__pyx_v_ieconfig.lpszProxyBypass != 0);
      if (__pyx_3) {
        __pyx_2 = _fromWideChar(__pyx_v_ieconfig.lpszProxyBypass); if (!__pyx_2) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 72; goto __pyx_L4;}
        Py_DECREF(__pyx_v_ret->proxybypass);
        __pyx_v_ret->proxybypass = __pyx_2;
        __pyx_2 = 0;
        goto __pyx_L8;
      }
      __pyx_L8:;
    }
    /*finally:*/ {
      int __pyx_why;
      PyObject *__pyx_exc_type, *__pyx_exc_value, *__pyx_exc_tb;
      int __pyx_exc_lineno;
      __pyx_why = 0; goto __pyx_L5;
      __pyx_L4: {
        __pyx_why = 4;
        Py_XDECREF(__pyx_2); __pyx_2 = 0;
        PyErr_Fetch(&__pyx_exc_type, &__pyx_exc_value, &__pyx_exc_tb);
        __pyx_exc_lineno = __pyx_lineno;
        goto __pyx_L5;
      }
      __pyx_L5:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":74 */
      __pyx_3 = (__pyx_v_ieconfig.lpszAutoConfigUrl != 0);
      if (__pyx_3) {
        GlobalFree(__pyx_v_ieconfig.lpszAutoConfigUrl);
        goto __pyx_L10;
      }
      __pyx_L10:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":76 */
      __pyx_3 = (__pyx_v_ieconfig.lpszProxy != 0);
      if (__pyx_3) {
        GlobalFree(__pyx_v_ieconfig.lpszProxy);
        goto __pyx_L11;
      }
      __pyx_L11:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":78 */
      __pyx_3 = (__pyx_v_ieconfig.lpszProxyBypass != 0);
      if (__pyx_3) {
        GlobalFree(__pyx_v_ieconfig.lpszProxyBypass);
        goto __pyx_L12;
      }
      __pyx_L12:;
      switch (__pyx_why) {
        case 4: {
          PyErr_Restore(__pyx_exc_type, __pyx_exc_value, __pyx_exc_tb);
          __pyx_lineno = __pyx_exc_lineno;
          __pyx_exc_type = 0;
          __pyx_exc_value = 0;
          __pyx_exc_tb = 0;
          goto __pyx_L1;
        }
      }
    }

    /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":80 */
    Py_INCREF(((PyObject *)__pyx_v_ret));
    __pyx_r = ((PyObject *)__pyx_v_ret);
    goto __pyx_L0;
    goto __pyx_L2;
  }
  __pyx_L2:;

  __pyx_r = Py_None; Py_INCREF(Py_None);
  goto __pyx_L0;
  __pyx_L1:;
  Py_XDECREF(__pyx_2);
  __Pyx_AddTraceback("_pymfclib_winhttp.getIEProxyConfigForCurrentUser");
  __pyx_r = 0;
  __pyx_L0:;
  Py_DECREF(__pyx_v_ret);
  return __pyx_r;
}

static struct value *
fnpy_call (struct gdbarch *gdbarch, const struct language_defn *language,
	   void *cookie, int argc, struct value **argv)
{
  /* The gdbpy_enter object needs to be placed first, so that it's the last to
     be destroyed.  */
  gdbpy_enter enter_py (gdbarch, language);
  struct value *value;
  gdbpy_ref<> result;
  gdbpy_ref<> args (convert_values_to_python (argc, argv));

  /* convert_values_to_python can return NULL on error.  If we
     encounter this, do not call the function, but allow the Python ->
     error code conversion below to deal with the Python exception.
     Note, that this is different if the function simply does not
     have arguments.  */

  if (args != NULL)
    {
      gdbpy_ref<> callable (PyObject_GetAttrString ((PyObject *) cookie,
						    "invoke"));
      if (callable == NULL)
	error (_("No method named 'invoke' in object."));

      result.reset (PyObject_Call (callable.get (), args.get (), NULL));
    }

  if (result == NULL)
    {
      PyObject *ptype, *pvalue, *ptraceback;

      PyErr_Fetch (&ptype, &pvalue, &ptraceback);

      /* Try to fetch an error message contained within ptype, pvalue.
	 When fetching the error message we need to make our own copy,
	 we no longer own ptype, pvalue after the call to PyErr_Restore.  */

      gdb::unique_xmalloc_ptr<char>
	msg (gdbpy_exception_to_string (ptype, pvalue));

      if (msg == NULL)
	{
	  /* An error occurred computing the string representation of the
	     error message.  This is rare, but we should inform the user.  */

	  printf_filtered (_("An error occurred in a Python "
			     "convenience function\n"
			     "and then another occurred computing the "
			     "error message.\n"));
	  gdbpy_print_stack ();
	}

      /* Don't print the stack for gdb.GdbError exceptions.
	 It is generally used to flag user errors.

	 We also don't want to print "Error occurred in Python command"
	 for user errors.  However, a missing message for gdb.GdbError
	 exceptions is arguably a bug, so we flag it as such.  */

      if (!PyErr_GivenExceptionMatches (ptype, gdbpy_gdberror_exc)
	  || msg == NULL || *msg == '\0')
	{
	  PyErr_Restore (ptype, pvalue, ptraceback);
	  gdbpy_print_stack ();
	  if (msg != NULL && *msg != '\0')
	    error (_("Error occurred in Python convenience function: %s"),
		   msg.get ());
	  else
	    error (_("Error occurred in Python convenience function."));
	}
      else
	{
	  Py_XDECREF (ptype);
	  Py_XDECREF (pvalue);
	  Py_XDECREF (ptraceback);
	  error ("%s", msg.get ());
	}
    }

  value = convert_value_from_python (result.get ());
  if (value == NULL)
    {
      gdbpy_print_stack ();
      error (_("Error while executing Python code."));
    }

  return value;
}

//.........这里部分代码省略.........

    /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":115 */
    __pyx_4 = PyObject_CallObject(((PyObject *)__pyx_ptype_17_pymfclib_winhttp_ProxyInfo), 0); if (!__pyx_4) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 115; goto __pyx_L1;}
    Py_DECREF(((PyObject *)__pyx_v_ret));
    __pyx_v_ret = ((struct __pyx_obj_17_pymfclib_winhttp_ProxyInfo *)__pyx_4);
    __pyx_4 = 0;

    /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":116 */
    __pyx_4 = PyInt_FromLong((__pyx_v_proxyinfo.dwAccessType == WINHTTP_ACCESS_TYPE_NO_PROXY)); if (!__pyx_4) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 116; goto __pyx_L1;}
    Py_DECREF(__pyx_v_ret->noproxy);
    __pyx_v_ret->noproxy = __pyx_4;
    __pyx_4 = 0;

    /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":118 */
    /*try:*/ {

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":119 */
      __pyx_1 = (__pyx_v_proxyinfo.lpszProxy != 0);
      if (__pyx_1) {
        __pyx_4 = _fromWideChar(__pyx_v_proxyinfo.lpszProxy); if (!__pyx_4) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 120; goto __pyx_L5;}
        Py_DECREF(__pyx_v_ret->proxy);
        __pyx_v_ret->proxy = __pyx_4;
        __pyx_4 = 0;
        goto __pyx_L7;
      }
      __pyx_L7:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":121 */
      __pyx_1 = (__pyx_v_proxyinfo.lpszProxyBypass != 0);
      if (__pyx_1) {
        __pyx_4 = _fromWideChar(__pyx_v_proxyinfo.lpszProxyBypass); if (!__pyx_4) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 122; goto __pyx_L5;}
        Py_DECREF(__pyx_v_ret->proxybypass);
        __pyx_v_ret->proxybypass = __pyx_4;
        __pyx_4 = 0;
        goto __pyx_L8;
      }
      __pyx_L8:;
    }
    /*finally:*/ {
      int __pyx_why;
      PyObject *__pyx_exc_type, *__pyx_exc_value, *__pyx_exc_tb;
      int __pyx_exc_lineno;
      __pyx_why = 0; goto __pyx_L6;
      __pyx_L5: {
        __pyx_why = 4;
        Py_XDECREF(__pyx_4); __pyx_4 = 0;
        PyErr_Fetch(&__pyx_exc_type, &__pyx_exc_value, &__pyx_exc_tb);
        __pyx_exc_lineno = __pyx_lineno;
        goto __pyx_L6;
      }
      __pyx_L6:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":124 */
      __pyx_1 = (__pyx_v_proxyinfo.lpszProxy != 0);
      if (__pyx_1) {
        GlobalFree(__pyx_v_proxyinfo.lpszProxy);
        goto __pyx_L10;
      }
      __pyx_L10:;

      /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":126 */
      __pyx_1 = (__pyx_v_proxyinfo.lpszProxyBypass != 0);
      if (__pyx_1) {
        GlobalFree(__pyx_v_proxyinfo.lpszProxyBypass);
        goto __pyx_L11;
      }
      __pyx_L11:;
      switch (__pyx_why) {
        case 4: {
          PyErr_Restore(__pyx_exc_type, __pyx_exc_value, __pyx_exc_tb);
          __pyx_lineno = __pyx_exc_lineno;
          __pyx_exc_type = 0;
          __pyx_exc_value = 0;
          __pyx_exc_tb = 0;
          goto __pyx_L1;
        }
      }
    }

    /* "c:\src\ip\pymfc\pymfclib\_pymfclib_winhttp.pyx":128 */
    Py_INCREF(((PyObject *)__pyx_v_ret));
    __pyx_r = ((PyObject *)__pyx_v_ret);
    goto __pyx_L0;
    goto __pyx_L3;
  }
  __pyx_L3:;

  __pyx_r = Py_None; Py_INCREF(Py_None);
  goto __pyx_L0;
  __pyx_L1:;
  Py_XDECREF(__pyx_4);
  __Pyx_AddTraceback("_pymfclib_winhttp.WinHTTPSession.getProxyForUrl");
  __pyx_r = 0;
  __pyx_L0:;
  Py_DECREF(__pyx_v_ret);
  Py_DECREF(__pyx_v_self);
  Py_DECREF(__pyx_v_url);
  Py_DECREF(__pyx_v_configurl);
  return __pyx_r;
}

//.........这里部分代码省略.........
        *(f->f_stacktop++) = result;
    }

    /* Generators always return to their most recent caller, not
     * necessarily their creator. */
    Py_XINCREF(tstate->frame);
    assert(f->f_back == NULL);
    f->f_back = tstate->frame;

    gen->gi_running = 1;
    result = PyEval_EvalFrameEx(f, exc);
    gen->gi_running = 0;

    /* Don't keep the reference to f_back any longer than necessary.  It
     * may keep a chain of frames alive or it could create a reference
     * cycle. */
    assert(f->f_back == tstate->frame);
    Py_CLEAR(f->f_back);

    /* If the generator just returned (as opposed to yielding), signal
     * that the generator is exhausted. */
    if (result && f->f_stacktop == NULL) {
        if (result == Py_None) {
            /* Delay exception instantiation if we can */
            PyErr_SetNone(PyExc_StopIteration);
        } else {
            PyObject *e = PyObject_CallFunctionObjArgs(
                               PyExc_StopIteration, result, NULL);
            if (e != NULL) {
                PyErr_SetObject(PyExc_StopIteration, e);
                Py_DECREF(e);
            }
        }
        Py_CLEAR(result);
    }
    else if (!result && PyErr_ExceptionMatches(PyExc_StopIteration)) {
        /* Check for __future__ generator_stop and conditionally turn
         * a leaking StopIteration into RuntimeError (with its cause
         * set appropriately). */
        if (((PyCodeObject *)gen->gi_code)->co_flags &
              (CO_FUTURE_GENERATOR_STOP | CO_COROUTINE | CO_ITERABLE_COROUTINE))
        {
            PyObject *exc, *val, *val2, *tb;
            char *msg = "generator raised StopIteration";
            if (PyCoro_CheckExact(gen))
                msg = "coroutine raised StopIteration";
            PyErr_Fetch(&exc, &val, &tb);
            PyErr_NormalizeException(&exc, &val, &tb);
            if (tb != NULL)
                PyException_SetTraceback(val, tb);
            Py_DECREF(exc);
            Py_XDECREF(tb);
            PyErr_SetString(PyExc_RuntimeError, msg);
            PyErr_Fetch(&exc, &val2, &tb);
            PyErr_NormalizeException(&exc, &val2, &tb);
            Py_INCREF(val);
            PyException_SetCause(val2, val);
            PyException_SetContext(val2, val);
            PyErr_Restore(exc, val2, tb);
        }
        else {
            PyObject *exc, *val, *tb;

            /* Pop the exception before issuing a warning. */
            PyErr_Fetch(&exc, &val, &tb);

            if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
                                 "generator '%.50S' raised StopIteration",
                                 gen->gi_qualname)) {
                /* Warning was converted to an error. */
                Py_XDECREF(exc);
                Py_XDECREF(val);
                Py_XDECREF(tb);
            }
            else {
                PyErr_Restore(exc, val, tb);
            }
        }
    }

    if (!result || f->f_stacktop == NULL) {
        /* generator can't be rerun, so release the frame */
        /* first clean reference cycle through stored exception traceback */
        PyObject *t, *v, *tb;
        t = f->f_exc_type;
        v = f->f_exc_value;
        tb = f->f_exc_traceback;
        f->f_exc_type = NULL;
        f->f_exc_value = NULL;
        f->f_exc_traceback = NULL;
        Py_XDECREF(t);
        Py_XDECREF(v);
        Py_XDECREF(tb);
        gen->gi_frame->f_gen = NULL;
        gen->gi_frame = NULL;
        Py_DECREF(f);
    }

    return result;
}

//.........这里部分代码省略.........
            if (err < 0)
                return gen_send_ex(gen, Py_None, 1, 0);
            goto throw_here;
        }
        if (PyGen_CheckExact(yf)) {
            gen->gi_running = 1;
            ret = gen_throw((PyGenObject *)yf, args);
            gen->gi_running = 0;
        } else {
            PyObject *meth = _PyObject_GetAttrId(yf, &PyId_throw);
            if (meth == NULL) {
                if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
                    Py_DECREF(yf);
                    return NULL;
                }
                PyErr_Clear();
                Py_DECREF(yf);
                goto throw_here;
            }
            gen->gi_running = 1;
            ret = PyObject_CallObject(meth, args);
            gen->gi_running = 0;
            Py_DECREF(meth);
        }
        Py_DECREF(yf);
        if (!ret) {
            PyObject *val;
            /* Pop subiterator from stack */
            ret = *(--gen->gi_frame->f_stacktop);
            assert(ret == yf);
            Py_DECREF(ret);
            /* Termination repetition of YIELD_FROM */
            gen->gi_frame->f_lasti += 2;
            if (_PyGen_FetchStopIterationValue(&val) == 0) {
                ret = gen_send_ex(gen, val, 0, 0);
                Py_DECREF(val);
            } else {
                ret = gen_send_ex(gen, Py_None, 1, 0);
            }
        }
        return ret;
    }

throw_here:
    /* First, check the traceback argument, replacing None with
       NULL. */
    if (tb == Py_None) {
        tb = NULL;
    }
    else if (tb != NULL && !PyTraceBack_Check(tb)) {
        PyErr_SetString(PyExc_TypeError,
            "throw() third argument must be a traceback object");
        return NULL;
    }

    Py_INCREF(typ);
    Py_XINCREF(val);
    Py_XINCREF(tb);

    if (PyExceptionClass_Check(typ))
        PyErr_NormalizeException(&typ, &val, &tb);

    else if (PyExceptionInstance_Check(typ)) {
        /* Raising an instance.  The value should be a dummy. */
        if (val && val != Py_None) {
            PyErr_SetString(PyExc_TypeError,
              "instance exception may not have a separate value");
            goto failed_throw;
        }
        else {
            /* Normalize to raise <class>, <instance> */
            Py_XDECREF(val);
            val = typ;
            typ = PyExceptionInstance_Class(typ);
            Py_INCREF(typ);

            if (tb == NULL)
                /* Returns NULL if there's no traceback */
                tb = PyException_GetTraceback(val);
        }
    }
    else {
        /* Not something you can raise.  throw() fails. */
        PyErr_Format(PyExc_TypeError,
                     "exceptions must be classes or instances "
                     "deriving from BaseException, not %s",
                     Py_TYPE(typ)->tp_name);
            goto failed_throw;
    }

    PyErr_Restore(typ, val, tb);
    return gen_send_ex(gen, Py_None, 1, 0);

failed_throw:
    /* Didn't use our arguments, so restore their original refcounts */
    Py_DECREF(typ);
    Py_XDECREF(val);
    Py_XDECREF(tb);
    return NULL;
}

/* This function is called by the tp_dealloc handler to clear weak references.
 *
 * This iterates through the weak references for 'object' and calls callbacks
 * for those references which have one.  It returns when all callbacks have
 * been attempted.
 */
void
PyObject_ClearWeakRefs(PyObject *object)
{
    PyWeakReference **list;

    if (object == NULL
        || !PyType_SUPPORTS_WEAKREFS(object->ob_type)
        || object->ob_refcnt != 0) {
        PyErr_BadInternalCall();
        return;
    }
    list = GET_WEAKREFS_LISTPTR(object);
    /* Remove the callback-less basic and proxy references */
    if (*list != NULL && (*list)->wr_callback == NULL) {
        clear_weakref(*list);
        if (*list != NULL && (*list)->wr_callback == NULL)
            clear_weakref(*list);
    }
    if (*list != NULL) {
        PyWeakReference *current = *list;
        int count = _PyWeakref_GetWeakrefCount(current);
        int restore_error = PyErr_Occurred() ? 1 : 0;
        PyObject *err_type, *err_value, *err_tb;

        if (restore_error)
            PyErr_Fetch(&err_type, &err_value, &err_tb);
        if (count == 1) {
            PyObject *callback = current->wr_callback;

            current->wr_callback = NULL;
            clear_weakref(current);
            if (callback != NULL) {
                handle_callback(current, callback);
                Py_DECREF(callback);
            }
        }
        else {
            PyObject *tuple = PyTuple_New(count * 2);
            int i = 0;

            for (i = 0; i < count; ++i) {
                PyWeakReference *next = current->wr_next;

                Py_INCREF(current);
                PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
                PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
                current->wr_callback = NULL;
                clear_weakref(current);
                current = next;
            }
            for (i = 0; i < count; ++i) {
                PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1);

                if (callback != NULL) {
                    PyObject *current = PyTuple_GET_ITEM(tuple, i * 2);
                    handle_callback((PyWeakReference *)current, callback);
                }
            }
            Py_DECREF(tuple);
        }
        if (restore_error)
            PyErr_Restore(err_type, err_value, err_tb);
    }
}