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Properly return errors.

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This commit is contained in:
Marcin Mielniczuk
2020-01-17 09:12:12 +01:00
parent 8a02a48e91
commit 5b5f9a7b06
2 changed files with 14 additions and 17 deletions
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10
crates/wasi-common/src/error.rs
View File

@@ -248,15 +248,15 @@ pub(crate) trait FromRawOsError {
pub(crate) type Result<T> = std::result::Result<T, Error>;
pub(crate) trait WasiErrno {
fn as_wasi_errno(&self) -> wasi::__wasi_errno_t;
pub(crate) trait AsWasiError {
fn as_wasi_error(&self) -> WasiError;
}
impl<T> WasiErrno for Result<T> {
fn as_wasi_errno(&self) -> wasi::__wasi_errno_t {
impl<T> AsWasiError for Result<T> {
fn as_wasi_error(&self) -> WasiError {
self.as_ref()
.err()
.unwrap_or(&Error::ESUCCESS)
.as_wasi_errno()
.as_wasi_error()
}
}

17
crates/wasi-common/src/sys/windows/hostcalls_impl/misc.rs
View File

@@ -5,7 +5,7 @@ use crate::fdentry::Descriptor;
use crate::hostcalls_impl::{ClockEventData, FdEventData};
use crate::memory::*;
use crate::sys::host_impl;
use crate::{wasi, wasi32, Error, Result};
use crate::{error::WasiError, wasi, wasi32, Error, Result};
use cpu_time::{ProcessTime, ThreadTime};
use lazy_static::lazy_static;
use log::{debug, error, trace, warn};
@@ -26,7 +26,7 @@ enum PollState {
Ready,
NotReady, // it's not ready, but we didn't wait
TimedOut, // it's not ready and a timeout has occurred
Error(Error),
Error(WasiError), // not using the top-lever Error because it's not Clone
}
enum WaitMode {
@@ -82,7 +82,7 @@ impl StdinPoll {
// Linux returns `POLLIN` in both cases, and we imitate this behavior.
let resp = match std::io::stdin().lock().fill_buf() {
Ok(_) => PollState::Ready,
Err(e) => PollState::Error(e.into()),
Err(e) => PollState::Error(Error::from(e).as_wasi_error()),
};
// Notify the requestor about data in stdin. They may have already timed out,
@@ -168,13 +168,13 @@ pub(crate) fn clock_time_get(clock_id: wasi::__wasi_clockid_t) -> Result<wasi::_
}
fn make_rw_event(event: &FdEventData, nbytes: Result<u64>) -> wasi::__wasi_event_t {
use crate::error::WasiErrno;
let error = nbytes.as_wasi_errno();
use crate::error::AsWasiError;
let error = nbytes.as_wasi_error();
let nbytes = nbytes.unwrap_or_default();
wasi::__wasi_event_t {
userdata: event.userdata,
r#type: event.r#type,
error,
error: error.as_raw_errno(),
u: wasi::__wasi_event_u_t {
fd_readwrite: wasi::__wasi_event_fd_readwrite_t { nbytes, flags: 0 },
},
@@ -356,10 +356,7 @@ pub(crate) fn poll_oneoff(
PollState::Ready => handle_rw_event(event, events),
PollState::NotReady => {} // not immediately available, so just ignore
PollState::TimedOut => handle_timeout_event(timeout.unwrap().0, events),
PollState::Error(ref e) => {
error!("FIXME return real error");
handle_error_event(event, Error::ENOTSUP, events);
}
PollState::Error(e) => handle_error_event(event, Error::Wasi(e), events),
}
}
}