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use self::types::{PyBaseException, PyBaseExceptionRef};
use crate::common::lock::PyRwLock;
use crate::{
builtins::{
traceback::PyTracebackRef, PyNone, PyStr, PyStrRef, PyTuple, PyTupleRef, PyType, PyTypeRef,
},
function::{ArgIterable, FuncArgs, IntoPyException, IntoPyObject},
py_io::{self, Write},
stdlib::sys,
suggestion::offer_suggestions,
IdProtocol, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, StaticType,
TryFromObject, TypeProtocol, VirtualMachine,
};
use crossbeam_utils::atomic::AtomicCell;
use itertools::Itertools;
use std::{
collections::HashSet,
io::{self, BufRead, BufReader},
ops::Deref,
};
impl std::fmt::Debug for PyBaseException {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
// TODO: implement more detailed, non-recursive Debug formatter
f.write_str("PyBaseException")
}
}
impl PyValue for PyBaseException {
fn class(vm: &VirtualMachine) -> &PyTypeRef {
&vm.ctx.exceptions.base_exception_type
}
}
impl VirtualMachine {
// Why `impl VirtualMachine?
// These functi
CE3F
ons are natively free function in CPython - not methods of PyException
/// Print exception chain by calling sys.excepthook
pub fn print_exception(&self, exc: PyBaseExceptionRef) {
let vm = self;
let write_fallback = |exc, errstr| {
if let Ok(stderr) = sys::get_stderr(vm) {
let mut stderr = py_io::PyWriter(stderr, vm);
// if this fails stderr might be closed -- ignore it
let _ = writeln!(stderr, "{}", errstr);
let _ = self.write_exception(&mut stderr, exc);
} else {
eprintln!("{}\nlost sys.stderr", errstr);
let _ = self.write_exception(&mut py_io::IoWriter(io::stderr()), exc);
}
};
if let Ok(excepthook) = vm.sys_module.clone().get_attr("excepthook", vm) {
let (exc_type, exc_val, exc_tb) = vm.split_exception(exc.clone());
if let Err(eh_exc) = vm.invoke(&excepthook, (exc_type, exc_val, exc_tb)) {
write_fallback(&eh_exc, "Error in sys.excepthook:");
write_fallback(&exc, "Original exception was:");
}
} else {
write_fallback(&exc, "missing sys.excepthook");
}
}
pub fn write_exception<W: Write>(
&self,
output: &mut W,
exc: &PyBaseExceptionRef,
) -> Result<(), W::Error> {
let seen = &mut HashSet::<usize>::new();
self.write_exception_recursive(output, exc, seen)
}
fn write_exception_recursive<W: Write>(
&self,
output: &mut W,
exc: &PyBaseExceptionRef,
seen: &mut HashSet<usize>,
) -> Result<(), W::Error> {
// This function should not be called directly,
// use `wite_exception` as a public interface.
// It is similar to `print_exception_recursive` from `CPython`.
seen.insert(exc.as_object().get_id());
#[allow(clippy::manual_map)]
if let Some((cause_or_context, msg)) = if let Some(cause) = exc.cause() {
// This can be a special case: `raise e from e`,
// we just ignore it and treat like `raise e` without any extra steps.
Some((
cause,
"\nThe above exception was the direct cause of the following exception:\n",
))
} else if let Some(context) = exc.context() {
// This can be a special case:
// e = ValueError('e')
// e.__context__ = e
// In this case, we just ignore
// `__context__` part from going into recursion.
Some((
context,
"\nDuring handling of the above exception, another exception occurred:\n",
))
} else {
None
} {
if !seen.contains(&cause_or_context.as_object().get_id()) {
self.write_exception_recursive(output, &cause_or_context, seen)?;
writeln!(output, "{}", msg)?;
} else {
seen.insert(cause_or_context.as_object().get_id());
}
}
self.write_exception_inner(output, exc)
}
/// Print exception with traceback
pub fn write_exception_inner<W: Write>(
&self,
output: &mut W,
exc: &PyBaseExceptionRef,
) -> Result<(), W::Error> {
let vm = self;
if let Some(tb) = exc.traceback.read().clone() {
writeln!(output, "Traceback (most recent call last):")?;
for tb in tb.iter() {
write_traceback_entry(output, &tb)?;
}
}
let varargs = exc.args();
let args_repr = vm.exception_args_as_string(varargs, true);
let exc_class = exc.class();
let exc_name = exc_class.name();
match args_repr.len() {
0 => write!(output, "{}", exc_name),
1 => write!(output, "{}: {}", exc_name, args_repr[0]),
_ => write!(
output,
"{}: ({})",
exc_name,
args_repr.into_iter().format(", ")
),
}?;
match offer_suggestions(exc, vm) {
Some(suggestions) => writeln!(output, ". Did you mean: '{suggestions}'?"),
None => writeln!(output),
}
}
fn exception_args_as_string(&self, varargs: PyTupleRef, str_single: bool) -> Vec<PyStrRef> {
let vm = self;
let varargs = varargs.as_slice();
match varargs.len() {
0 => vec![],
1 => {
let args0_repr = if str_single {
varargs[0]
.str(vm)
.unwrap_or_else(|_| PyStr::from("<element str() failed>").into_ref(vm))
} else {
varargs[0]
.repr(vm)
.unwrap_or_else(|_| PyStr::from("<element repr() failed>").into_ref(vm))
};
vec![args0_repr]
}
_ => varargs
.iter()
.map(|vararg| {
vararg
.repr(vm)
.unwrap_or_else(|_| PyStr::from("<element repr() failed>").into_ref(vm))
})
.collect(),
}
}
pub fn split_exception(
&self,
exc: PyBaseExceptionRef,
) -> (PyObjectRef, PyObjectRef, PyObjectRef) {
let tb = exc.traceback().into_pyobject(self);
(exc.clone_class().into(), exc.into(), tb)
}
/// Similar to PyErr_NormalizeException in CPython
pub fn normalize_exception(
&self,
exc_type: PyObjectRef,
exc_val: PyObjectRef,
exc_tb: PyObjectRef,
) -> PyResult<PyBaseExceptionRef> {
let ctor = ExceptionCtor::try_from_object(self, exc_type)?;
let exc = ctor.instantiate_value(exc_val, self)?;
if let Some(tb) = Option::<PyTracebackRef>::try_from_object(self, exc_tb)? {
exc.set_traceback(Some(tb));
}
Ok(exc)
}
pub fn invoke_exception(
&self,
cls: PyTypeRef,
args: Vec<PyObjectRef>,
) -> PyResult<PyBaseExceptionRef> {
// TODO: fast-path built-in exceptions by directly instantiating them? Is that really worth it?
let res = self.invoke(cls.as_object(), args)?;
PyBaseExceptionRef::try_from_object(self, res)
}
}
fn print_source_line<W: Write>(
output: &mut W,
filename: &str,
lineno: usize,
) -> Result<(), W::Error> {
// TODO: use io.open() method instead, when available, according to https://github.com/python/cpython/blob/main/Python/traceback.c#L393
// TODO: support different encodings
let file = match std::fs::File::open(filename) {
Ok(file) => file,
Err(_) => return Ok(()),
};
let file = BufReader::new(file);
for (i, line) in file.lines().enumerate() {
if i + 1 == lineno {
if let Ok(line) = line {
// Indented with 4 spaces
writeln!(output, " {}", line.trim_start())?;
}
return Ok(());
}
}
Ok(())
}
/// Print exception occurrence location from traceback element
fn write_traceback_entry<W: Write>(
output: &mut W,
tb_entry: &PyTracebackRef,
) -> Result<(), W::Error> {
let filename = tb_entry.frame.code.source_path.as_str();
writeln!(
output,
r##" File "{}", line {}, in {}"##,
filename, tb_entry.lineno, tb_entry.frame.code.obj_name
)?;
print_source_line(output, filename, tb_entry.lineno)?;
Ok(())
}
#[derive(Clone)]
pub enum ExceptionCtor {
Class(PyTypeRef),
Instance(PyBaseExceptionRef),
}
impl TryFromObject for ExceptionCtor {
fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
obj.downcast::<PyType>()
.and_then(|cls| {
if cls.issubclass(&vm.ctx.exceptions.base_exception_type) {
Ok(Self::Class(cls))
} else {
Err(cls.into())
}
})
.or_else(|obj| obj.downcast::<PyBaseException>().map(Self::Instance))
.map_err(|obj| {
vm.new_type_error(format!(
"exceptions must be classes or instances deriving from BaseException, not {}",
obj.class().name()
))
})
}
}
impl ExceptionCtor {
pub fn instantiate(self, vm: &VirtualMachine) -> PyResult<PyBaseExceptionRef> {
match self {
Self::Class(cls) => vm.invoke_exception(cls, vec![]),
Self::Instance(exc) => Ok(exc),
}
}
pub fn instantiate_value(
self,
value: PyObjectRef,
vm: &VirtualMachine,
) -> PyResult<PyBaseExceptionRef> {
let exc_inst = value.clone().downcast::<PyBaseException>().ok();
match (self, exc_inst) {
// both are instances; which would we choose?
(Self::Instance(_exc_a), Some(_exc_b)) => {
Err(vm
.new_type_error("instance exception may not have a separate value".to_owned()))
}
// if the "type" is an instance and the value isn't, use the "type"
(Self::Instance(exc), None) => Ok(exc),
// if the value is an instance of the type, use the instance value
(Self::Class(cls), Some(exc)) if exc.isinstance(&cls) => Ok(exc),
// otherwise; construct an exception of the type using the value as args
(Self::Class(cls), _) => {
let args = match_class!(match value {
PyNone => vec![],
tup @ PyTuple => tup.as_slice().to_vec(),
exc @ PyBaseException => exc.args().as_slice().to_vec(),
obj => vec![obj],
});
vm.invoke_exception(cls, args)
}
}
}
}
#[derive(Debug, Clone)]
pub struct ExceptionZoo {
pub base_exception_type: PyTypeRef,
pub system_exit: PyTypeRef,
pub keyboard_interrupt: PyTypeRef,
pub generator_exit: PyTypeRef,
pub exception_type: PyTypeRef,
pub stop_iteration: PyTypeRef,
pub stop_async_iteration: PyTypeRef,
pub arithmetic_error: PyTypeRef,
pub floating_point_error: PyTypeRef,
pub overflow_error: PyTypeRef,
pub zero_division_error: PyTypeRef,
pub assertion_error: PyTypeRef,
pub attribute_error: PyTypeRef,
pub buffer_error: PyTypeRef,
pub eof_error: PyTypeRef,
pub import_error: PyTypeRef,
pub module_not_found_error: PyTypeRef,
pub lookup_error: PyTypeRef,
pub index_error: PyTypeRef,
pub key_error: PyTypeRef,
pub memory_error: PyTypeRef,
pub name_error: PyTypeRef,
pub unbound_local_error: PyTypeRef,
pub os_error: PyTypeRef,
pub blocking_io_error: PyTypeRef,
pub child_process_error: PyTypeRef,
pub connection_error: PyTypeRef,
pub broken_pipe_error: PyTypeRef,
pub connection_aborted_error: PyTypeRef,
pub connection_refused_error: PyTypeRef,
pub connection_reset_error: PyTypeRef,
pub file_exists_error: PyTypeRef,
pub file_not_found_error: PyTypeRef,
pub interrupted_error: PyTypeRef,
pub is_a_directory_error: PyTypeRef,
pub not_a_directory_error: PyTypeRef,
pub permission_error: PyTypeRef,
pub process_lookup_error: PyTypeRef,
pub timeout_error: PyTypeRef,
pub reference_error: PyTypeRef,
pub runtime_error: PyTypeRef,
pub not_implemented_error: PyTypeRef,
pub recursion_error: PyTypeRef,
pub syntax_error: PyTypeRef,
pub indentation_error: PyTypeRef,
pub tab_error: PyTypeRef,
pub system_error: PyTypeRef,
pub type_error: PyTypeRef,
pub value_error: PyTypeRef,
pub unicode_error: PyTypeRef,
pub unicode_decode_error: PyTypeRef,
pub unicode_encode_error: PyTypeRef,
pub unicode_translate_error: PyTypeRef,
#[cfg(feature = "jit")]
pub jit_error: PyTypeRef,
pub warning: PyTypeRef,
pub deprecation_warning: PyTypeRef,
pub pending_deprecation_warning: PyTypeRef,
pub runtime_warning: PyTypeRef,
pub syntax_warning: PyTypeRef,
pub user_warning: PyTypeRef,
pub future_warning: PyTypeRef,
pub import_warning: PyTypeRef,
pub unicode_warning: PyTypeRef,
pub bytes_warning: PyTypeRef,
pub resource_warning: PyTypeRef,
pub encoding_warning: PyTypeRef,
}
macro_rules! extend_exception {
(
$exc_struct:ident,
$ctx:expr,
$class:expr
) => {
extend_exception!($exc_struct, $ctx, $class, {});
};
(
$exc_struct:ident,
$ctx:expr,
$class:expr,
{ $($name:expr => $value:expr),* $(,)* }
) => {
$exc_struct::extend_class($ctx, $class);
extend_class!($ctx, $class, {
$($name => $value,)*
});
};
}
#[pyimpl(flags(BASETYPE, HAS_DICT))]
impl PyBaseException {
pub(crate) fn new(args: Vec<PyObjectRef>, vm: &VirtualMachine) -> PyBaseException {
PyBaseException {
traceback: PyRwLock::new(None),
cause: PyRwLock::new(None),
context: PyRwLock::new(None),
suppress_context: AtomicCell::new(false),
args: PyRwLock::new(PyTuple::new_ref(args, &vm.ctx)),
}
}
#[pyslot]
pub(crate) fn slot_new(cls: PyTypeRef, args: FuncArgs, vm: &VirtualMachine) -> PyResult {
PyBaseException::new(args.args, vm).into_pyresult_with_type(vm, cls)
}
#[pymethod(magic)]
pub(crate) fn init(zelf: PyRef<Self>, args: FuncArgs, vm: &VirtualMachine) -> PyResult<()> {
*zelf.args.write() = PyTuple::new_ref(args.args, &vm.ctx);
Ok(())
}
pub fn get_arg(&self, idx: usize) -> Option<PyObjectRef> {
self.args.read().as_slice().get(idx).cloned()
}
#[pyproperty]
pub fn args(&self) -> PyTupleRef {
self.args.read().clone()
}
#[pyproperty(setter)]
fn set_args(&self, args: ArgIterable, vm: &VirtualMachine) -> PyResult<()> {
let args = args.iter(vm)?.collect::<PyResult<Vec<_>>>()?;
*self.args.write() = PyTuple::new_ref(args, &vm.ctx);
Ok(())
}
#[pyproperty(magic)]
pub fn traceback(&self) -> Option<PyTracebackRef> {
self.traceback.read().clone()
}
#[pyproperty(magic, setter)]
pub fn set_traceback(&self, traceback: Option<PyTracebackRef>) {
*self.traceback.write() = traceback;
}
#[pyproperty(magic)]
pub fn cause(&self) -> Option<PyRef<Self>> {
self.cause.read().clone()
}
#[pyproperty(magic, setter)]
pub fn set_cause(&self, cause: Option<PyRef<Self>>) {
let mut c = self.cause.write();
self.set_suppress_context(true);
*c = cause;
}
#[pyproperty(magic)]
pub fn context(&self) -> Option<PyRef<Self>> {
self.context.read().clone()
}
#[pyproperty(magic, setter)]
pub fn set_context(&self, context: Option<PyRef<Self>>) {
*self.context.write() = context;
}
#[pyproperty(name = "__suppress_context__")]
pub(super) fn get_suppress_context(&self) -> bool {
self.suppress_context.load()
}
#[pyproperty(name = "__suppress_context__", setter)]
fn set_suppress_context(&self, suppress_context: bool) {
self.suppress_context.store(suppress_context);
}
#[pymethod]
fn with_traceback(zelf: PyRef<Self>, tb: Option<PyTracebackRef>) -> PyResult {
*zelf.traceback.write() = tb;
Ok(zelf.as_object().to_owned())
}
#[pymethod(magic)]
pub(super) fn str(&self, vm: &VirtualMachine) -> PyStrRef {
let str_args = vm.exception_args_as_string(self.args(), true);
match str_args.into_iter().exactly_one() {
Err(i) if i.len() == 0 => PyStr::from("").into_ref(vm),
Ok(s) => s,
Err(i) => PyStr::from(format!("({})", i.format(", "))).into_ref(vm),
}
}
#[pymethod(magic)]
fn repr(zelf: PyRef<Self>, vm: &VirtualMachine) -> String {
let repr_args = vm.exception_args_as_string(zelf.args(), false);
let cls = zelf.class();
format!("{}({})", cls.name(), repr_args.iter().format(", "))
}
}
impl ExceptionZoo {
pub(crate) fn init() -> Self {
use self::types::*;
let base_exception_type = PyBaseException::init_bare_type().clone();
// Sorted By Hierarchy then alphabetized.
let system_exit = PySystemExit::init_bare_type().clone();
let keyboard_interrupt = PyKeyboardInterrupt::init_bare_type().clone();
let generator_exit = PyGeneratorExit::init_bare_type().clone();
let exception_type = PyException::init_bare_type().clone();
let stop_iteration = PyStopIteration::init_bare_type().clone();
let stop_async_iteration = PyStopAsyncIteration::init_bare_type().clone();
let arithmetic_error = PyArithmeticError::init_bare_type().clone();
let floating_point_error = PyFloatingPointError::init_bare_type().clone();
let overflow_error = PyOverflowError::init_bare_type().clone();
let zero_division_error = PyZeroDivisionError::init_bare_type().clone();
let assertion_error = PyAssertionError::init_bare_type().clone();
let attribute_error = PyAttributeError::init_bare_type().clone();
let buffer_error = PyBufferError::init_bare_type().clone();
let eof_error = PyEOFError::init_bare_type().clone();
let import_error = PyImportError::init_bare_type().clone();
let module_not_found_error = PyModuleNotFoundError::init_bare_type().clone();
let lookup_error = PyLookupError::init_bare_type().clone();
let index_error = PyIndexError::init_bare_type().clone();
let key_error = PyKeyError::init_bare_type().clone();
let memory_error = PyMemoryError::init_bare_type().clone();
let name_error = PyNameError::init_bare_type().clone();
let unbound_local_error = PyUnboundLocalError::init_bare_type().clone();
// os errors
let os_error = PyOSError::init_bare_type().clone();
let blocking_io_error = PyBlockingIOError::init_bare_type().clone();
let child_process_error = PyChildProcessError::init_bare_type().clone();
let connection_error = PyConnectionError::init_bare_type().clone();
let broken_pipe_error = PyBrokenPipeError::init_bare_type().clone();
let connection_aborted_error = PyConnectionAbortedError::init_bare_type().clone();
let connection_refused_error = PyConnectionRefusedError::init_bare_type().clone();
let connection_reset_error = PyConnectionResetError::init_bare_type().clone();
let file_exists_error = PyFileExistsError::init_bare_type().clone();
let file_not_found_error = PyFileNotFoundError::init_bare_type().clone();
let interrupted_error = PyInterruptedError::init_bare_type().clone();
let is_a_directory_error = PyIsADirectoryError::init_bare_type().clone();
let not_a_directory_error = PyNotADirectoryError::init_bare_type().clone();
let permission_error = PyPermissionError::init_bare_type().clone();
let process_lookup_error = PyProcessLookupError::init_bare_type().clone();
let timeout_error = PyTimeoutError::init_bare_type().clone();
let reference_error = PyReferenceError::init_bare_type().clone();
let runtime_error = PyRuntimeError::init_bare_type().clone();
let not_implemented_error = PyNotImplementedError::init_bare_type().clone();
let recursion_error = PyRecursionError::init_bare_type().clone();
let syntax_error = PySyntaxError::init_bare_type().clone();
let indentation_error = PyIndentationError::init_bare_type().clone();
let tab_error = PyTabError::init_bare_type().clone();
let system_error = PySystemError::init_bare_type().clone();
let type_error = PyTypeError::init_bare_type().clone();
let value_error = PyValueError::init_bare_type().clone();
let unicode_error = PyUnicodeError::init_bare_type().clone();
let unicode_decode_error = PyUnicodeDecodeError::init_bare_type().clone();
let unicode_encode_error = PyUnicodeEncodeError::init_bare_type().clone();
let unicode_translate_error = PyUnicodeTranslateError::init_bare_type().clone();
#[cfg(feature = "jit")]
let jit_error = PyJitError::init_bare_type().clone();
let warning = PyWarning::init_bare_type().clone();
let deprecation_warning = PyDeprecationWarning::init_bare_type().clone();
let pending_deprecation_warning = PyPendingDeprecationWarning::init_bare_type().clone();
let runtime_warning = PyRuntimeWarning::init_bare_type().clone();
let syntax_warning = PySyntaxWarning::init_bare_type().clone();
let user_warning = PyUserWarning::init_bare_type().clone();
let future_warning = PyFutureWarning::init_bare_type().clone();
let import_warning = PyImportWarning::init_bare_type().clone();
let unicode_warning = PyUnicodeWarning::init_bare_type().clone();
let bytes_warning = PyBytesWarning::init_bare_type().clone();
let resource_warning = PyResourceWarning::init_bare_type().clone();
let encoding_warning = PyEncodingWarning::init_bare_type().clone();
Self {
base_exception_type,
system_exit,
keyboard_interrupt,
generator_exit,
exception_type,
stop_iteration,
stop_async_iteration,
arithmetic_error,
floating_point_error,
overflow_error,
zero_division_error,
assertion_error,
attribute_error,
buffer_error,
eof_error,
import_error,
module_not_found_error,
lookup_error,
index_error,
key_error,
memory_error,
name_error,
unbound_local_error,
os_error,
blocking_io_error,
child_process_error,
connection_error,
broken_pipe_error,
connection_aborted_error,
connection_refused_error,
connection_reset_error,
file_exists_error,
file_not_found_error,
interrupted_error,
is_a_directory_error,
not_a_directory_error,
permission_error,
process_lookup_error,
timeout_error,
reference_error,
runtime_error,
not_implemented_error,
recursion_error,
syntax_error,
indentation_error,
tab_error,
system_error,
type_error,
value_error,
unicode_error,
unicode_decode_error,
unicode_encode_error,
unicode_translate_error,
#[cfg(feature = "jit")]
jit_error,
warning,
deprecation_warning,
pending_deprecation_warning,
runtime_warning,
syntax_warning,
user_warning,
future_warning,
import_warning,
unicode_warning,
bytes_warning,
resource_warning,
encoding_warning,
}
}
// TODO: remove it after fixing `errno` / `winerror` problem
#[allow(clippy::redundant_clone)]
pub fn extend(ctx: &PyContext) {
use self::types::*;
let excs = &ctx.exceptions;
PyBaseException::extend_class(ctx, &excs.base_exception_type);
// Sorted By Hierarchy then alphabetized.
extend_exception!(PySystemExit, ctx, &excs.system_exit, {
"code" => ctx.new_readonly_getset("code", excs.system_exit.clone(), system_exit_code),
});
extend_exception!(PyKeyboardInterrupt, ctx, &excs.keyboard_interrupt);
extend_exception!(PyGeneratorExit, ctx, &excs.generator_exit);
extend_exception!(PyException, ctx, &excs.exception_type);
extend_exception!(PyStopIteration, ctx, &excs.stop_iteration, {
"value" => ctx.new_readonly_getset("value", excs.stop_iteration.clone(), make_arg_getter(0)),
});
extend_exception!(PyStopAsyncIteration, ctx, &excs.stop_async_iteration);
extend_exception!(PyArithmeticError, ctx, &excs.arithmetic_error);
extend_exception!(PyFloatingPointError, ctx, &excs.floating_point_error);
extend_exception!(PyOverflowError, ctx, &excs.overflow_error);
extend_exception!(PyZeroDivisionError, ctx, &excs.zero_division_error);
extend_exception!(PyAssertionError, ctx, &excs.assertion_error);
extend_exception!(PyAttributeError, ctx, &excs.attribute_error, {
"name" => ctx.none(),
"obj" => ctx.none(),
});
extend_exception!(PyBufferError, ctx, &excs.buffer_error);
extend_exception!(PyEOFError, ctx, &excs.eof_error);
extend_exception!(PyImportError, ctx, &excs.import_error, {
"msg" => ctx.new_readonly_getset("msg", excs.import_error.clone(), make_arg_getter(0)),
});
extend_exception!(PyModuleNotFoundError, ctx, &excs.module_not_found_error);
extend_exception!(PyLookupError, ctx, &excs.lookup_error);
extend_exception!(PyIndexError, ctx, &excs.index_error);
extend_exception!(PyKeyError, ctx, &excs.key_error, {
"__str__" => ctx.new_method("__str__", excs.key_error.clone(), key_error_str),
});
extend_exception!(PyMemoryError, ctx, &excs.memory_error);
extend_exception!(PyNameError, ctx, &excs.name_error, {
"name" => ctx.none(),
});
extend_exception!(PyUnboundLocalError, ctx, &excs.unbound_local_error);
// os errors:
let errno_getter =
ctx.new_readonly_getset("errno", excs.os_error.clone(), |exc: PyBaseExceptionRef| {
let args = exc.args();
let args = args.as_slice();
args.get(0).filter(|_| args.len() > 1).cloned()
});
extend_exception!(PyOSError, ctx, &excs.os_error, {
// POSIX exception code
"errno" => errno_getter.clone(),
// exception strerror
"strerror" => ctx.new_readonly_getset("strerror", excs.os_error.clone(), make_arg_getter(1)),
// exception filename
"filename" => ctx.none(),
// second exception filename
"filename2" => ctx.none(),
"__str__" => ctx.new_method("__str__", excs.os_error.clone(), os_error_str),
});
// TODO: this isn't really accurate
#[cfg(windows)]
excs.os_error.set_str_attr("winerror", errno_getter.clone());
extend_exception!(PyBlockingIOError, ctx, &excs.blocking_io_error);
extend_exception!(PyChildProcessError, ctx, &excs.child_process_error);
extend_exception!(PyConnectionError, ctx, &excs.connection_error);
extend_exception!(PyBrokenPipeError, ctx, &excs.broken_pipe_error);
extend_exception!(
PyConnectionAbortedError,
ctx,
&excs.connection_aborted_error
);
extend_exception!(
PyConnectionRefusedError,
ctx,
&excs.connection_refused_error
);
extend_exception!(PyConnectionResetError, ctx, &excs.connection_reset_error);
extend_exception!(PyFileExistsError, ctx, &excs.file_exists_error);
extend_exception!(PyFileNotFoundError, ctx, &excs.file_not_found_error);
extend_exception!(PyInterruptedError, ctx, &excs.interrupted_error);
extend_exception!(PyIsADirectoryError, ctx, &excs.is_a_directory_error);
extend_exception!(PyNotADirectoryError, ctx, &excs.not_a_directory_error);
extend_exception!(PyPermissionError, ctx, &excs.permission_error);
extend_exception!(PyProcessLookupError, ctx, &excs.process_lookup_error);
extend_exception!(PyTimeoutError, ctx, &excs.timeout_error);
extend_exception!(PyReferenceError, ctx, &excs.reference_error);
extend_exception!(PyRuntimeError, ctx, &excs.runtime_error);
extend_exception!(PyNotImplementedError, ctx, &excs.not_implemented_error);
extend_exception!(PyRecursionError, ctx, &excs.recursion_error);
extend_exception!(PySyntaxError, ctx, &excs.syntax_error, {
"msg" => ctx.new_readonly_getset("msg", excs.syntax_error.clone(), make_arg_getter(0)),
// TODO: members
"filename" => ctx.none(),
"lineno" => ctx.none(),
"offset" => ctx.none(),
"text" => ctx.none(),
});
extend_exception!(PyIndentationError, ctx, &excs.indentation_error);
extend_exception!(PyTabError, ctx, &excs.tab_error);
extend_exception!(PySystemError, ctx, &excs.system_error);
extend_exception!(PyTypeError, ctx, &excs.type_error);
extend_exception!(PyValueError, ctx, &excs.value_error);
extend_exception!(PyUnicodeError, ctx, &excs.unicode_error);
extend_exception!(PyUnicodeDecodeError, ctx, &excs.unicode_decode_error, {
"encoding" => ctx.new_readonly_getset("encoding", excs.unicode_decode_error.clone(), make_arg_getter(0)),
"object" => ctx.new_readonly_getset("object", excs.unicode_decode_error.clone(), make_arg_getter(1)),
"start" => ctx.new_readonly_getset("start", excs.unicode_decode_error.clone(), make_arg_getter(2)),
"end" => ctx.new_readonly_getset("end", excs.unicode_decode_error.clone(), make_arg_getter(3)),
"reason" => ctx.new_readonly_getset("reason", excs.unicode_decode_error.clone(), make_arg_getter(4)),
});
extend_exception!(PyUnicodeEncodeError, ctx, &excs.unicode_encode_error, {
"encoding" => ctx.new_readonly_getset("encoding", excs.unicode_encode_error.clone(), make_arg_getter(0)),
"object" => ctx.new_readonly_getset("object", excs.unicode_encode_error.clone(), make_arg_getter(1)),
"start" => ctx.new_readonly_getset("start", excs.unicode_encode_error.clone(), make_arg_getter(2), ),
"end" => ctx.new_readonly_getset("end", excs.unicode_encode_error.clone(), make_arg_getter(3)),
"reason" => ctx.new_readonly_getset("reason", excs.unicode_encode_error.clone(), make_arg_getter(4)),
});
extend_exception!(PyUnicodeTranslateError, ctx, &excs.unicode_translate_error, {
"encoding" => ctx.new_readonly_getset("encoding", excs.unicode_translate_error.clone(), none_getter),
"object" => ctx.new_readonly_getset("object", excs.unicode_translate_error.clone(), make_arg_getter(0)),
"start" => ctx.new_readonly_getset("start", excs.unicode_translate_error.clone(), make_arg_getter(1)),
"end" => ctx.new_readonly_getset("end", excs.unicode_translate_error.clone(), make_arg_getter(2)),
"reason" => ctx.new_readonly_getset("reason", excs.unicode_translate_error.clone(), make_arg_getter(3)),
});
#[cfg(feature = "jit")]
extend_exception!(PyJitError, ctx, &excs.jit_error);
extend_exception!(PyWarning, ctx, &excs.warning);
extend_exception!(PyDeprecationWarning, ctx, &excs.deprecation_warning);
extend_exception!(
PyPendingDeprecationWarning,
ctx,
&excs.pending_deprecation_warning
);
extend_exception!(PyRuntimeWarning, ctx, &excs.runtime_warning);
extend_exception!(PySyntaxWarning, ctx, &excs.syntax_warning);
extend_exception!(PyUserWarning, ctx, &excs.user_warning);
extend_exception!(PyFutureWarning, ctx, &excs.future_warning);
extend_exception!(PyImportWarning, ctx, &excs.import_warning);
extend_exception!(PyUnicodeWarning, ctx, &excs.unicode_warning);
extend_exception!(PyBytesWarning, ctx, &excs.bytes_warning);
extend_exception!(PyResourceWarning, ctx, &excs.resource_warning);
extend_exception!(PyEncodingWarning, ctx, &excs.encoding_warning);
}
}
fn none_getter(_obj: PyObjectRef, vm: &VirtualMachine) -> PyRef<PyNone> {
vm.ctx.none.clone()
}
fn make_arg_getter(idx: usize) -> impl Fn(PyBaseExceptionRef) -> Option<PyObjectRef> {
move |exc| exc.get_arg(idx)
}
fn key_error_str(exc: PyBaseExceptionRef, vm: &VirtualMachine) -> PyStrRef {
let args = exc.args();
if args.as_slice().len() == 1 {
vm.exception_args_as_string(args, false)
.into_iter()
.exactly_one()
.unwrap()
} else {
exc.str(vm)
}
}
fn os_error_str(exc: PyBaseExceptionRef, vm: &VirtualMachine) -> PyResult<PyStrRef> {
let args = exc.args();
let obj = exc.as_object().to_owned();
if args.as_slice().len() == 2 {
// SAFETY: len() == 2 is checked so get_arg 1 or 2 won't panic
let errno = exc.get_arg(0).unwrap().str(vm)?;
let msg = exc.get_arg(1).unwrap().str(vm)?;
let s = match obj.clone().get_attr("filename", vm) {
Ok(filename) => match obj.get_attr("filename2", vm) {
Ok(filename2) => format!(
"[Errno {}] {}: '{}' -> '{}'",
errno,
msg,
filename.str(vm)?,
filename2.str(vm)?
),
Err(_) => format!("[Errno {}] {}: '{}'", errno, msg, filename.str(vm)?),
},
Err(_) => {
format!("[Errno {}] {}", errno, msg)
}
};
Ok(vm.ctx.new_str(s))
} else {
Ok(exc.str(vm))
}
}
fn system_exit_code(exc: PyBaseExceptionRef) -> Option<PyObjectRef> {
exc.args.read().as_slice().first().map(|code| {
match_class!(match code {
ref tup @ PyTuple => match tup.as_slice() {
[x] => x.clone(),
_ => code.clone(),
},
other => other.clone(),
})
})
}
pub struct SerializeException<'s> {
vm: &'s VirtualMachine,
exc: &'s PyBaseExceptionRef,
}
impl<'s> SerializeException<'s> {
pub fn new(vm: &'s VirtualMachine, exc: &'s PyBaseExceptionRef) -> Self {
SerializeException { vm, exc }
}
}
impl serde::Serialize for SerializeException<'_> {
fn serialize<S: serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
use serde::ser::*;
let mut struc = s.serialize_struct("PyBaseException", 7)?;
struc.serialize_field("exc_type", self.exc.class().name().deref())?;
let tbs = {
struct Tracebacks(PyTracebackRef);
impl serde::Serialize for Tracebacks {
fn serialize<S: serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
let mut s = s.serialize_seq(None)?;
for tb in self.0.iter() {
s.serialize_element(&**tb)?;
}
s.end()
}
}
self.exc.traceback().map(Tracebacks)
};
struc.serialize_field("traceback", &tbs)?;
struc.serialize_field(
"cause",
&self.exc.cause().as_ref().map(|e| Self::new(self.vm, e)),
)?;
struc.serialize_field(
"context",
&self.exc.context().as_ref().map(|e| Self::new(self.vm, e)),
)?;
struc.serialize_field("suppress_context", &self.exc.get_suppress_context())?;
let args = {
struct Args<'vm>(&'vm VirtualMachine, PyTupleRef);
impl serde::Serialize for Args<'_> {
fn serialize<S: serde::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
s.collect_seq(
self.1
.as_slice()
.iter()
.map(|arg| crate::py_serde::PyObjectSerializer::new(self.0, arg)),
)
}
}
Args(self.vm, self.exc.args())
};
struc.serialize_field("args", &args)?;
let rendered = {
let mut rendered = String::new();
self.vm
.write_exception(&mut rendered, self.exc)
.map_err(S::Error::custom)?;
rendered
};
struc.serialize_field("rendered", &rendered)?;
struc.end()
}
}
pub fn cstring_error(vm: &VirtualMachine) -> PyBaseExceptionRef {
vm.new_value_error("embedded null character".to_owned())
}
impl IntoPyException for std::ffi::NulError {
fn into_pyexception(self, vm: &VirtualMachine) -> PyBaseExceptionRef {
cstring_error(vm)
}
}
#[cfg(windows)]
impl<C: widestring::UChar> IntoPyException for widestring::NulError<C> {
fn into_pyexception(self, vm: &VirtualMachine) -> PyBaseExceptionRef {
cstring_error(vm)
}
}
#[cfg(any(unix, windows, target_os = "wasi"))]
pub(crate) fn raw_os_error_to_exc_type(errno: i32, vm: &VirtualMachine) -> Option<PyTypeRef> {
use crate::stdlib::errno::errors;
let excs = &vm.ctx.exceptions;
match errno {