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Copy pathExceptionAlgo.cpp
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146 lines (121 loc) · 4.68 KB
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//////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012, John Haddon. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above
// copyright notice, this list of conditions and the following
// disclaimer.
//
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided with
// the distribution.
//
// * Neither the name of John Haddon nor the names of
// any other contributors to this software may be used to endorse or
// promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////
#include "boost/python.hpp"
#include "IECorePython/ExceptionAlgo.h"
#include "IECore/Exception.h"
using namespace boost::python;
namespace
{
std::string formatInternal(
const handle<> &exceptionHandle, const handle<> &valueHandle, const handle<> &tracebackHandle,
bool withStacktrace, int *lineNumber = nullptr
)
{
object exception( exceptionHandle );
// `valueHandle` and `tracebackHandle` may be null.
object value;
if( valueHandle )
{
value = object( valueHandle );
}
object traceback;
if( tracebackHandle )
{
traceback = object( tracebackHandle );
}
if( lineNumber )
{
if( PyErr_GivenExceptionMatches( value.ptr(), PyExc_SyntaxError ) )
{
*lineNumber = extract<int>( value.attr( "lineno" ) );
}
else if( traceback )
{
*lineNumber = extract<int>( traceback.attr( "tb_lineno" ) );
}
}
object tracebackModule( import( "traceback" ) );
object formattedList;
if( withStacktrace )
{
formattedList = tracebackModule.attr( "format_exception" )( exception, value, traceback );
}
else
{
formattedList = tracebackModule.attr( "format_exception_only" )( exception, value );
}
object formatted = str( "" ).join( formattedList );
std::string s = extract<std::string>( formatted );
return s;
}
std::tuple<handle<>, handle<>, handle<>> currentPythonException()
{
PyObject *exceptionPyObject, *valuePyObject, *tracebackPyObject;
PyErr_Fetch( &exceptionPyObject, &valuePyObject, &tracebackPyObject );
if( !exceptionPyObject )
{
throw IECore::Exception( "No Python exception set" );
}
PyErr_NormalizeException( &exceptionPyObject, &valuePyObject, &tracebackPyObject );
return std::make_tuple( handle<>( exceptionPyObject ), handle<>( allow_null( valuePyObject ) ), handle<>( allow_null( tracebackPyObject ) ) );
}
} // namespace
namespace IECorePython
{
namespace ExceptionAlgo
{
std::string formatPythonException( bool withStacktrace, int *lineNumber )
{
auto [exception, value, traceback] = currentPythonException();
return formatInternal( exception, value, traceback, withStacktrace, lineNumber );
}
void translatePythonException( bool withStacktrace )
{
auto [exception, value, traceback] = currentPythonException();
// If the python exception is one bound via IECorePython::ExceptionClass,
// then we can extract and throw the C++ exception held internally.
if( PyObject_HasAttrString( value.get(), "__exceptionPointer" ) )
{
object exceptionPointerMethod( handle<>( PyObject_GetAttrString( value.get(), "__exceptionPointer" ) ) );
object exceptionPointerObject = exceptionPointerMethod();
std::exception_ptr exceptionPointer = boost::python::extract<std::exception_ptr>( exceptionPointerObject )();
std::rethrow_exception( exceptionPointer );
}
// Otherwise, we just throw a generic exception describing the python error.
throw IECore::Exception( formatInternal( exception, value, traceback, withStacktrace ) );
}
} // namespace ExceptionAlgo
} // namespace IECorePython