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remove some unnecessary to_owned

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This commit is contained in:
Ralf Jung 2024-09-22 16:39:02 +02:00
parent 5dee646aea
commit ed24426824
3 changed files with 9 additions and 9 deletions
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8
src/tools/miri/src/shims/unix/fd.rs
View File

@ -173,9 +173,9 @@ impl FileDescription for io::Stdout {
dest: &MPlaceTy<'tcx>,
ecx: &mut MiriInterpCx<'tcx>,
) -> InterpResult<'tcx> {
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?.to_owned();
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?;
// We allow writing to stderr even with isolation enabled.
let result = Write::write(&mut { self }, &bytes);
let result = Write::write(&mut { self }, bytes);
// Stdout is buffered, flush to make sure it appears on the
// screen. This is the write() syscall of the interpreted
// program, we want it to correspond to a write() syscall on
@ -204,10 +204,10 @@ impl FileDescription for io::Stderr {
dest: &MPlaceTy<'tcx>,
ecx: &mut MiriInterpCx<'tcx>,
) -> InterpResult<'tcx> {
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?.to_owned();
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?;
// We allow writing to stderr even with isolation enabled.
// No need to flush, stderr is not buffered.
let result = Write::write(&mut { self }, &bytes);
let result = Write::write(&mut { self }, bytes);
ecx.return_written_byte_count_or_error(result, dest)
}

8
src/tools/miri/src/shims/unix/fs.rs
View File

@ -55,8 +55,8 @@ impl FileDescription for FileHandle {
ecx: &mut MiriInterpCx<'tcx>,
) -> InterpResult<'tcx> {
assert!(communicate_allowed, "isolation should have prevented even opening a file");
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?.to_owned();
let result = (&mut &self.file).write(&bytes);
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?;
let result = (&mut &self.file).write(bytes);
ecx.return_written_byte_count_or_error(result, dest)
}
@ -102,11 +102,11 @@ impl FileDescription for FileHandle {
// Correctness of this emulation relies on sequential nature of Miri execution.
// The closure is used to emulate `try` block, since we "bubble" `io::Error` using `?`.
let file = &mut &self.file;
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?.to_owned();
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?;
let mut f = || {
let cursor_pos = file.stream_position()?;
file.seek(SeekFrom::Start(offset))?;
let res = file.write(&bytes);
let res = file.write(bytes);
// Attempt to restore cursor position even if the write has failed
file.seek(SeekFrom::Start(cursor_pos))
.expect("failed to restore file position, this shouldn't be possible");

2
src/tools/miri/src/shims/unix/unnamed_socket.rs
View File

@ -245,7 +245,7 @@ impl FileDescription for AnonSocket {
}
// Do full write / partial write based on the space available.
let actual_write_size = len.min(available_space);
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?.to_owned();
let bytes = ecx.read_bytes_ptr_strip_provenance(ptr, Size::from_bytes(len))?;
writebuf.buf.extend(&bytes[..actual_write_size]);
// Need to stop accessing peer_fd so that it can be notified.