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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
mod macros;
#[cfg(feature = "backtrace")]
/// Re-export of the `backtrace` crate for use in macros and
/// to ensure the needed version is kept in sync in dependents.
pub use backtrace;
#[cfg(not(feature = "backtrace"))]
/// A compatibility shim for `backtrace`.
pub mod backtrace {
use std::fmt;
pub struct Backtrace;
impl fmt::Debug for Backtrace {
#[cold]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Not available")
}
}
}
mod redact;
pub use redact::*;
mod reporting;
pub use reporting::{
report_breadcrumb, report_error_to_app, set_application_error_reporter,
unset_application_error_reporter, ApplicationErrorReporter,
};
mod handling;
pub use handling::{convert_log_report_error, ErrorHandling, ErrorReporting, GetErrorHandling};
/// XXX - Most of this is now considered deprecated - only FxA uses it, and
/// should be replaced with the facilities in the `handling` module.
/// Define a wrapper around the the provided ErrorKind type.
/// See also `define_error` which is more likely to be what you want.
#[macro_export]
macro_rules! define_error_wrapper {
($Kind:ty) => {
pub type Result<T, E = Error> = std::result::Result<T, E>;
struct ErrorData {
kind: $Kind,
backtrace: Option<std::sync::Mutex<$crate::backtrace::Backtrace>>,
}
impl ErrorData {
#[cold]
fn new(kind: $Kind) -> Self {
ErrorData {
kind,
#[cfg(feature = "backtrace")]
backtrace: Some(std::sync::Mutex::new(
$crate::backtrace::Backtrace::new_unresolved(),
)),
#[cfg(not(feature = "backtrace"))]
backtrace: None,
}
}
#[cfg(feature = "backtrace")]
#[cold]
fn get_backtrace(&self) -> Option<&std::sync::Mutex<$crate::backtrace::Backtrace>> {
self.backtrace.as_ref().map(|mutex| {
mutex.lock().unwrap().resolve();
mutex
})
}
#[cfg(not(feature = "backtrace"))]
#[cold]
fn get_backtrace(&self) -> Option<&std::sync::Mutex<$crate::backtrace::Backtrace>> {
None
}
}
impl std::fmt::Debug for ErrorData {
#[cfg(feature = "backtrace")]
#[cold]
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
let mut bt = self.backtrace.unwrap().lock().unwrap();
bt.resolve();
write!(f, "{:?}\n\n{}", bt, self.kind)
}
#[cfg(not(feature = "backtrace"))]
#[cold]
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.kind)
}
}
#[derive(Debug, thiserror::Error)]
pub struct Error(Box<ErrorData>);
impl Error {
#[cold]
pub fn kind(&self) -> &$Kind {
&self.0.kind
}
#[cold]
pub fn backtrace(&self) -> Option<&std::sync::Mutex<$crate::backtrace::Backtrace>> {
self.0.get_backtrace()
}
}
impl std::fmt::Display for Error {
#[cold]
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
std::fmt::Display::fmt(self.kind(), f)
}
}
impl From<$Kind> for Error {
// Cold to optimize in favor of non-error cases.
#[cold]
fn from(ctx: $Kind) -> Error {
Error(Box::new(ErrorData::new(ctx)))
}
}
};
}
/// Define a set of conversions from external error types into the provided
/// error kind. Use `define_error` to do this at the same time as
/// `define_error_wrapper`.
#[macro_export]
macro_rules! define_error_conversions {
($Kind:ident { $(($variant:ident, $type:ty)),* $(,)? }) => ($(
impl From<$type> for Error {
// Cold to optimize in favor of non-error cases.
#[cold]
fn from(e: $type) -> Self {
Error::from($Kind::$variant(e))
}
}
)*);
}
/// All the error boilerplate (okay, with a couple exceptions in some cases) in
/// one place.
#[macro_export]
macro_rules! define_error {
($Kind:ident { $(($variant:ident, $type:ty)),* $(,)? }) => {
$crate::define_error_wrapper!($Kind);
$crate::define_error_conversions! {
$Kind {
$(($variant, $type)),*
}
}
};
}
uniffi_macros::include_scaffolding!("errorsupport");
|
