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Fix unsound transmute_copy use #1

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Fix unsound transmute_copy use #1

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9 changes: 3 additions & 6 deletions message-passing-framework/src/message.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ impl<T: MessageKind> Message<T> {
let byte_slice: &[u8] = std::slice::from_raw_parts(byte_ptr, std::mem::size_of::<V>());

std::ptr::copy(
&byte_slice[0],
byte_ptr,
self.body.as_mut_ptr().offset(i as isize),
std::mem::size_of::<V>(),
);
Expand All @@ -63,10 +63,7 @@ impl<T: MessageKind> Message<T> {
let i = self.body.len() - bytes;

let out = unsafe {
let data_ptr = self.body.as_ptr().offset(i as isize);
let byte_slice: &[u8] = std::slice::from_raw_parts(data_ptr, bytes);

std::mem::transmute_copy(&byte_slice[0])
self.body.as_ptr().offset(i as isize).cast::<V>().read_unaligned()
};

self.body.resize(i, 0);
Expand Down Expand Up @@ -112,7 +109,7 @@ impl<T: MessageKind> From<&[u8]> for Message<T> {
panic!("no, this is not header");
}

let header: MessageHeader<T> = unsafe { std::mem::transmute_copy(&bytes[0]) };
let header: MessageHeader<T> = unsafe { bytes.as_ptr().cast::<MessageHeader<T>>().read_unaligned() };

if header.size != bytes_len as u32 {
panic!(
Expand Down