bjoernager/rust
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remove some functions that were only used by Miri

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This commit is contained in:
Ralf Jung 2021-05-17 14:42:27 +02:00
parent 44ec846f4e
commit cb5533cff2
2 changed files with 0 additions and 98 deletions
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75
compiler/rustc_mir/src/interpret/memory.rs
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@ -804,41 +804,6 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
self.get_raw(ptr.alloc_id)?.get_bytes(self, ptr, size)
}
/// Reads a 0-terminated sequence of bytes from memory. Returns them as a slice.
///
/// Performs appropriate bounds checks.
pub fn read_c_str(&self, ptr: Scalar<M::PointerTag>) -> InterpResult<'tcx, &[u8]> {
let ptr = self.force_ptr(ptr)?; // We need to read at least 1 byte, so we *need* a ptr.
self.get_raw(ptr.alloc_id)?.read_c_str(self, ptr)
}
/// Reads a 0x0000-terminated u16-sequence from memory. Returns them as a Vec<u16>.
/// Terminator 0x0000 is not included in the returned Vec<u16>.
///
/// Performs appropriate bounds checks.
pub fn read_wide_str(&self, ptr: Scalar<M::PointerTag>) -> InterpResult<'tcx, Vec<u16>> {
let size_2bytes = Size::from_bytes(2);
let align_2bytes = Align::from_bytes(2).unwrap();
// We need to read at least 2 bytes, so we *need* a ptr.
let mut ptr = self.force_ptr(ptr)?;
let allocation = self.get_raw(ptr.alloc_id)?;
let mut u16_seq = Vec::new();
loop {
ptr = self
.check_ptr_access(ptr.into(), size_2bytes, align_2bytes)?
.expect("cannot be a ZST");
let single_u16 = allocation.read_scalar(self, ptr, size_2bytes)?.to_u16()?;
if single_u16 != 0x0000 {
u16_seq.push(single_u16);
ptr = ptr.offset(size_2bytes, self)?;
} else {
break;
}
}
Ok(u16_seq)
}
/// Writes the given stream of bytes into memory.
///
/// Performs appropriate bounds checks.
@ -866,46 +831,6 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
self.get_raw_mut(ptr.alloc_id)?.write_bytes(&tcx, ptr, src)
}
/// Writes the given stream of u16s into memory.
///
/// Performs appropriate bounds checks.
pub fn write_u16s(
&mut self,
ptr: Scalar<M::PointerTag>,
src: impl IntoIterator<Item = u16>,
) -> InterpResult<'tcx> {
let mut src = src.into_iter();
let (lower, upper) = src.size_hint();
let len = upper.expect("can only write bounded iterators");
assert_eq!(lower, len, "can only write iterators with a precise length");
let size = Size::from_bytes(lower);
let ptr = match self.check_ptr_access(ptr, size, Align::from_bytes(2).unwrap())? {
Some(ptr) => ptr,
None => {
// zero-sized access
assert_matches!(
src.next(),
None,
"iterator said it was empty but returned an element"
);
return Ok(());
}
};
let tcx = self.tcx;
let allocation = self.get_raw_mut(ptr.alloc_id)?;
for idx in 0..len {
let val = Scalar::from_u16(
src.next().expect("iterator was shorter than it said it would be"),
);
let offset_ptr = ptr.offset(Size::from_bytes(idx) * 2, &tcx)?; // `Size` multiplication
allocation.write_scalar(&tcx, offset_ptr, val.into(), Size::from_bytes(2))?;
}
assert_matches!(src.next(), None, "iterator was longer than it said it would be");
Ok(())
}
/// Expects the caller to have checked bounds and alignment.
pub fn copy(
&mut self,