-use std::mem;
-use std::ffi::{OsStr, OsString};
+use std::ffi::OsStr;
+use std::{iter, mem};
+use std::convert::TryFrom;
-use rustc::hir::def_id::{DefId, CRATE_DEF_INDEX};
use rustc::mir;
use rustc::ty::{
self,
- layout::{self, Align, LayoutOf, Size, TyLayout},
+ layout::{self, LayoutOf, Size, TyLayout},
+ List, TyCtxt,
};
+use rustc_hir::def_id::{DefId, CRATE_DEF_INDEX};
+use rustc_span::source_map::DUMMY_SP;
use rand::RngCore;
impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
-pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
- /// Gets an instance for a path.
- fn resolve_path(&self, path: &[&str]) -> InterpResult<'tcx, ty::Instance<'tcx>> {
- let this = self.eval_context_ref();
- this.tcx
- .crates()
- .iter()
- .find(|&&krate| this.tcx.original_crate_name(krate).as_str() == path[0])
- .and_then(|krate| {
- let krate = DefId {
- krate: *krate,
- index: CRATE_DEF_INDEX,
- };
- let mut items = this.tcx.item_children(krate);
- let mut path_it = path.iter().skip(1).peekable();
-
- while let Some(segment) = path_it.next() {
- for item in mem::replace(&mut items, Default::default()).iter() {
- if item.ident.name.as_str() == *segment {
- if path_it.peek().is_none() {
- return Some(ty::Instance::mono(this.tcx.tcx, item.res.def_id()));
- }
-
- items = this.tcx.item_children(item.res.def_id());
- break;
+/// Gets an instance for a path.
+fn try_resolve_did<'mir, 'tcx>(tcx: TyCtxt<'tcx>, path: &[&str]) -> Option<DefId> {
+ tcx.crates()
+ .iter()
+ .find(|&&krate| tcx.original_crate_name(krate).as_str() == path[0])
+ .and_then(|krate| {
+ let krate = DefId { krate: *krate, index: CRATE_DEF_INDEX };
+ let mut items = tcx.item_children(krate);
+ let mut path_it = path.iter().skip(1).peekable();
+
+ while let Some(segment) = path_it.next() {
+ for item in mem::replace(&mut items, Default::default()).iter() {
+ if item.ident.name.as_str() == *segment {
+ if path_it.peek().is_none() {
+ return Some(item.res.def_id());
}
+
+ items = tcx.item_children(item.res.def_id());
+ break;
}
}
- None
- })
- .ok_or_else(|| {
- let path = path.iter().map(|&s| s.to_owned()).collect();
- err_unsup!(PathNotFound(path)).into()
- })
+ }
+ None
+ })
+}
+
+pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
+ /// Gets an instance for a path.
+ fn resolve_path(&self, path: &[&str]) -> ty::Instance<'tcx> {
+ let did = try_resolve_did(self.eval_context_ref().tcx.tcx, path)
+ .unwrap_or_else(|| panic!("failed to find required Rust item: {:?}", path));
+ ty::Instance::mono(self.eval_context_ref().tcx.tcx, did)
+ }
+
+ /// Evaluates the scalar at the specified path. Returns Some(val)
+ /// if the path could be resolved, and None otherwise
+ fn eval_path_scalar(
+ &mut self,
+ path: &[&str],
+ ) -> InterpResult<'tcx, ScalarMaybeUndef<Tag>> {
+ let this = self.eval_context_mut();
+ let instance = this.resolve_path(path);
+ let cid = GlobalId { instance, promoted: None };
+ let const_val = this.const_eval_raw(cid)?;
+ let const_val = this.read_scalar(const_val.into())?;
+ return Ok(const_val);
+ }
+
+ /// Helper function to get a `libc` constant as a `Scalar`.
+ fn eval_libc(&mut self, name: &str) -> InterpResult<'tcx, Scalar<Tag>> {
+ self.eval_context_mut()
+ .eval_path_scalar(&["libc", name])?
+ .not_undef()
+ }
+
+ /// Helper function to get a `libc` constant as an `i32`.
+ fn eval_libc_i32(&mut self, name: &str) -> InterpResult<'tcx, i32> {
+ self.eval_libc(name)?.to_i32()
+ }
+
+ /// Helper function to get the `TyLayout` of a `libc` type
+ fn libc_ty_layout(&mut self, name: &str) -> InterpResult<'tcx, TyLayout<'tcx>> {
+ let this = self.eval_context_mut();
+ let ty = this.resolve_path(&["libc", name]).monomorphic_ty(*this.tcx);
+ this.layout_of(ty)
}
/// Write a 0 of the appropriate size to `dest`.
/// Turn a Scalar into an Option<NonNullScalar>
fn test_null(&self, val: Scalar<Tag>) -> InterpResult<'tcx, Option<Scalar<Tag>>> {
let this = self.eval_context_ref();
- Ok(if this.is_null(val)? {
- None
- } else {
- Some(val)
- })
+ Ok(if this.is_null(val)? { None } else { Some(val) })
}
/// Get the `Place` for a local
fn local_place(&mut self, local: mir::Local) -> InterpResult<'tcx, PlaceTy<'tcx, Tag>> {
let this = self.eval_context_mut();
- let place = mir::Place { base: mir::PlaceBase::Local(local), projection: Box::new([]) };
+ let place = mir::Place { local: local, projection: List::empty() };
this.eval_place(&place)
}
/// Generate some random bytes, and write them to `dest`.
- fn gen_random(
- &mut self,
- ptr: Scalar<Tag>,
- len: usize,
- ) -> InterpResult<'tcx> {
+ fn gen_random(&mut self, ptr: Scalar<Tag>, len: u64) -> InterpResult<'tcx> {
// Some programs pass in a null pointer and a length of 0
// to their platform's random-generation function (e.g. getrandom())
// on Linux. For compatibility with these programs, we don't perform
}
let this = self.eval_context_mut();
- // Don't forget the bounds check.
- let ptr = this.memory.check_ptr_access(
- ptr,
- Size::from_bytes(len as u64),
- Align::from_bytes(1).unwrap()
- )?.expect("we already checked for size 0");
-
- let mut data = vec![0; len];
+ let mut data = vec![0; usize::try_from(len).unwrap()];
if this.machine.communicate {
// Fill the buffer using the host's rng.
getrandom::getrandom(&mut data)
- .map_err(|err| err_unsup_format!("getrandom failed: {}", err))?;
- }
- else {
+ .map_err(|err| err_unsup_format!("host getrandom failed: {}", err))?;
+ } else {
let rng = this.memory.extra.rng.get_mut();
rng.fill_bytes(&mut data);
}
- this.memory.get_mut(ptr.alloc_id)?.write_bytes(&*this.tcx, ptr, &data)
+ this.memory.write_bytes(ptr, data.iter().copied())
+ }
+
+ /// Call a function: Push the stack frame and pass the arguments.
+ /// For now, arguments must be scalars (so that the caller does not have to know the layout).
+ fn call_function(
+ &mut self,
+ f: ty::Instance<'tcx>,
+ args: &[Immediate<Tag>],
+ dest: Option<PlaceTy<'tcx, Tag>>,
+ stack_pop: StackPopCleanup,
+ ) -> InterpResult<'tcx> {
+ let this = self.eval_context_mut();
+
+ // Push frame.
+ let mir = &*this.load_mir(f.def, None)?;
+ let span = this
+ .stack()
+ .last()
+ .and_then(Frame::current_source_info)
+ .map(|si| si.span)
+ .unwrap_or(DUMMY_SP);
+ this.push_stack_frame(f, span, mir, dest, stack_pop)?;
+
+ // Initialize arguments.
+ let mut callee_args = this.frame().body.args_iter();
+ for arg in args {
+ let callee_arg = this.local_place(
+ callee_args.next().expect("callee has fewer arguments than expected"),
+ )?;
+ this.write_immediate(*arg, callee_arg)?;
+ }
+ callee_args.next().expect_none("callee has more arguments than expected");
+
+ Ok(())
}
/// Visits the memory covered by `place`, sensitive to freezing: the 3rd parameter
) -> InterpResult<'tcx> {
let this = self.eval_context_ref();
trace!("visit_frozen(place={:?}, size={:?})", *place, size);
- debug_assert_eq!(size,
+ debug_assert_eq!(
+ size,
this.size_and_align_of_mplace(place)?
- .map(|(size, _)| size)
- .unwrap_or_else(|| place.layout.size)
+ .map(|(size, _)| size)
+ .unwrap_or_else(|| place.layout.size)
);
// Store how far we proceeded into the place so far. Everything to the left of
// this offset has already been handled, in the sense that the frozen parts
let frozen_size = unsafe_cell_offset - end_offset;
// Everything between the end_ptr and this `UnsafeCell` is frozen.
if frozen_size != Size::ZERO {
- action(end_ptr, frozen_size, /*frozen*/true)?;
+ action(end_ptr, frozen_size, /*frozen*/ true)?;
}
// This `UnsafeCell` is NOT frozen.
if unsafe_cell_size != Size::ZERO {
- action(unsafe_cell_ptr, unsafe_cell_size, /*frozen*/false)?;
+ action(unsafe_cell_ptr, unsafe_cell_size, /*frozen*/ false)?;
}
// Update end end_ptr.
end_ptr = unsafe_cell_ptr.wrapping_offset(unsafe_cell_size, this);
unsafe_cell_action: |place| {
trace!("unsafe_cell_action on {:?}", place.ptr);
// We need a size to go on.
- let unsafe_cell_size = this.size_and_align_of_mplace(place)?
+ let unsafe_cell_size = this
+ .size_and_align_of_mplace(place)?
.map(|(size, _)| size)
// for extern types, just cover what we can
.unwrap_or_else(|| place.layout.size);
/// Visiting the memory covered by a `MemPlace`, being aware of
/// whether we are inside an `UnsafeCell` or not.
struct UnsafeCellVisitor<'ecx, 'mir, 'tcx, F>
- where F: FnMut(MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>
+ where
+ F: FnMut(MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>,
{
ecx: &'ecx MiriEvalContext<'mir, 'tcx>,
unsafe_cell_action: F,
}
- impl<'ecx, 'mir, 'tcx, F>
- ValueVisitor<'mir, 'tcx, Evaluator<'tcx>>
- for
- UnsafeCellVisitor<'ecx, 'mir, 'tcx, F>
+ impl<'ecx, 'mir, 'tcx, F> ValueVisitor<'mir, 'tcx, Evaluator<'tcx>>
+ for UnsafeCellVisitor<'ecx, 'mir, 'tcx, F>
where
- F: FnMut(MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>
+ F: FnMut(MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>,
{
type V = MPlaceTy<'tcx, Tag>;
}
// Hook to detect `UnsafeCell`.
- fn visit_value(&mut self, v: MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>
- {
+ fn visit_value(&mut self, v: MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx> {
trace!("UnsafeCellVisitor: {:?} {:?}", *v, v.layout.ty);
let is_unsafe_cell = match v.layout.ty.kind {
- ty::Adt(adt, _) => Some(adt.did) == self.ecx.tcx.lang_items().unsafe_cell_type(),
+ ty::Adt(adt, _) =>
+ Some(adt.did) == self.ecx.tcx.lang_items().unsafe_cell_type(),
_ => false,
};
if is_unsafe_cell {
fn visit_aggregate(
&mut self,
place: MPlaceTy<'tcx, Tag>,
- fields: impl Iterator<Item=InterpResult<'tcx, MPlaceTy<'tcx, Tag>>>,
+ fields: impl Iterator<Item = InterpResult<'tcx, MPlaceTy<'tcx, Tag>>>,
) -> InterpResult<'tcx> {
match place.layout.fields {
layout::FieldPlacement::Array { .. } => {
}
layout::FieldPlacement::Arbitrary { .. } => {
// Gather the subplaces and sort them before visiting.
- let mut places = fields.collect::<InterpResult<'tcx, Vec<MPlaceTy<'tcx, Tag>>>>()?;
+ let mut places =
+ fields.collect::<InterpResult<'tcx, Vec<MPlaceTy<'tcx, Tag>>>>()?;
places.sort_by_key(|place| place.ptr.assert_ptr().offset);
self.walk_aggregate(place, places.into_iter().map(Ok))
}
}
// We have to do *something* for unions.
- fn visit_union(&mut self, v: MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>
- {
+ fn visit_union(&mut self, v: MPlaceTy<'tcx, Tag>, fields: usize) -> InterpResult<'tcx> {
+ assert!(fields > 0); // we should never reach "pseudo-unions" with 0 fields, like primitives
+
// With unions, we fall back to whatever the type says, to hopefully be consistent
// with LLVM IR.
// FIXME: are we consistent, and is this really the behavior we want?
let frozen = self.ecx.type_is_freeze(v.layout.ty);
- if frozen {
- Ok(())
- } else {
- (self.unsafe_cell_action)(v)
- }
- }
-
- // We should never get to a primitive, but always short-circuit somewhere above.
- fn visit_primitive(&mut self, _v: MPlaceTy<'tcx, Tag>) -> InterpResult<'tcx>
- {
- bug!("we should always short-circuit before coming to a primitive")
+ if frozen { Ok(()) } else { (self.unsafe_cell_action)(v) }
}
}
}
- /// Helper function to get a `libc` constant as a `Scalar`.
- fn eval_libc(&mut self, name: &str) -> InterpResult<'tcx, Scalar<Tag>> {
- self.eval_context_mut()
- .eval_path_scalar(&["libc", name])?
- .ok_or_else(|| err_unsup_format!("Path libc::{} cannot be resolved.", name))?
- .not_undef()
- }
-
- /// Helper function to get a `libc` constant as an `i32`.
- fn eval_libc_i32(&mut self, name: &str) -> InterpResult<'tcx, i32> {
- self.eval_libc(name)?.to_i32()
- }
-
- /// Helper function to get the `TyLayout` of a `libc` type
- fn libc_ty_layout(&mut self, name: &str) -> InterpResult<'tcx, TyLayout<'tcx>> {
- let this = self.eval_context_mut();
- let ty = this.resolve_path(&["libc", name])?.ty(*this.tcx);
- this.layout_of(ty)
- }
-
// Writes several `ImmTy`s contiguosly into memory. This is useful when you have to pack
// different values into a struct.
fn write_packed_immediates(
&mut self,
- place: &MPlaceTy<'tcx, Tag>,
+ place: MPlaceTy<'tcx, Tag>,
imms: &[ImmTy<'tcx, Tag>],
) -> InterpResult<'tcx> {
let this = self.eval_context_mut();
for &imm in imms {
this.write_immediate_to_mplace(
*imm,
- place.offset(offset, None, imm.layout, &*this.tcx)?,
+ place.offset(offset, MemPlaceMeta::None, imm.layout, &*this.tcx)?,
)?;
offset += imm.layout.size;
}
/// Helper function used inside the shims of foreign functions to check that isolation is
/// disabled. It returns an error using the `name` of the foreign function if this is not the
/// case.
- fn check_no_isolation(&mut self, name: &str) -> InterpResult<'tcx> {
- if !self.eval_context_mut().machine.communicate {
- throw_unsup_format!("`{}` not available when isolation is enabled. Pass the flag `-Zmiri-disable-isolation` to disable it.", name)
+ fn check_no_isolation(&self, name: &str) -> InterpResult<'tcx> {
+ if !self.eval_context_ref().machine.communicate {
+ throw_unsup_format!(
+ "`{}` not available when isolation is enabled (pass the flag `-Zmiri-disable-isolation` to disable isolation)",
+ name,
+ )
}
Ok(())
}
+ /// Helper function used inside the shims of foreign functions to assert that the target OS
+ /// is `target_os`. It panics showing a message with the `name` of the foreign function
+ /// if this is not the case.
+ fn assert_target_os(&self, target_os: &str, name: &str) {
+ assert_eq!(
+ self.eval_context_ref().tcx.sess.target.target.target_os,
+ target_os,
+ "`{}` is only available on the `{}` target OS",
+ name,
+ target_os,
+ )
+ }
/// Sets the last error variable.
fn set_last_error(&mut self, scalar: Scalar<Tag>) -> InterpResult<'tcx> {
}
/// Gets the last error variable.
- fn get_last_error(&mut self) -> InterpResult<'tcx, Scalar<Tag>> {
- let this = self.eval_context_mut();
+ fn get_last_error(&self) -> InterpResult<'tcx, Scalar<Tag>> {
+ let this = self.eval_context_ref();
let errno_place = this.machine.last_error.unwrap();
this.read_scalar(errno_place.into())?.not_undef()
}
TimedOut => "ETIMEDOUT",
AlreadyExists => "EEXIST",
WouldBlock => "EWOULDBLOCK",
- _ => throw_unsup_format!("The {} error cannot be transformed into a raw os error", e)
+ _ => {
+ throw_unsup_format!("io error {} cannot be transformed into a raw os error", e)
+ }
})?
} else {
- // FIXME: we have to implement the windows' equivalent of this.
- throw_unsup_format!("Setting the last OS error from an io::Error is unsupported for {}.", target.target_os)
+ // FIXME: we have to implement the Windows equivalent of this.
+ throw_unsup_format!(
+ "setting the last OS error from an io::Error is unsupported for {}.",
+ target.target_os
+ )
};
this.set_last_error(last_error)
}
/// `Ok(-1)` and sets the last OS error accordingly.
///
/// This function uses `T: From<i32>` instead of `i32` directly because some IO related
- /// functions return different integer types (like `read`, that returns an `i64`)
+ /// functions return different integer types (like `read`, that returns an `i64`).
fn try_unwrap_io_result<T: From<i32>>(
&mut self,
result: std::io::Result<T>,
/// Helper function to read an OsString from a null-terminated sequence of bytes, which is what
/// the Unix APIs usually handle.
- fn read_os_string_from_c_string(&mut self, scalar: Scalar<Tag>) -> InterpResult<'tcx, OsString> {
- let bytes = self.eval_context_mut().memory.read_c_str(scalar)?;
- Ok(bytes_to_os_str(bytes)?.into())
+ fn read_os_str_from_c_str<'a>(&'a self, scalar: Scalar<Tag>) -> InterpResult<'tcx, &'a OsStr>
+ where
+ 'tcx: 'a,
+ 'mir: 'a,
+ {
+ #[cfg(target_os = "unix")]
+ fn bytes_to_os_str<'tcx, 'a>(bytes: &'a [u8]) -> InterpResult<'tcx, &'a OsStr> {
+ Ok(std::os::unix::ffi::OsStringExt::from_bytes(bytes))
+ }
+ #[cfg(not(target_os = "unix"))]
+ fn bytes_to_os_str<'tcx, 'a>(bytes: &'a [u8]) -> InterpResult<'tcx, &'a OsStr> {
+ let s = std::str::from_utf8(bytes)
+ .map_err(|_| err_unsup_format!("{:?} is not a valid utf-8 string", bytes))?;
+ Ok(&OsStr::new(s))
+ }
+
+ let this = self.eval_context_ref();
+ let bytes = this.memory.read_c_str(scalar)?;
+ bytes_to_os_str(bytes)
}
/// Helper function to write an OsStr as a null-terminated sequence of bytes, which is what
- /// the Unix APIs usually handle.
- fn write_os_str_to_c_string(&mut self, os_str: &OsStr, ptr: Pointer<Tag>, size: u64) -> InterpResult<'tcx> {
+ /// the Unix APIs usually handle. This function returns `Ok((false, length))` without trying
+ /// to write if `size` is not large enough to fit the contents of `os_string` plus a null
+ /// terminator. It returns `Ok((true, length))` if the writing process was successful. The
+ /// string length returned does not include the null terminator.
+ fn write_os_str_to_c_str(
+ &mut self,
+ os_str: &OsStr,
+ scalar: Scalar<Tag>,
+ size: u64,
+ ) -> InterpResult<'tcx, (bool, u64)> {
+ #[cfg(target_os = "unix")]
+ fn os_str_to_bytes<'tcx, 'a>(os_str: &'a OsStr) -> InterpResult<'tcx, &'a [u8]> {
+ std::os::unix::ffi::OsStringExt::into_bytes(os_str)
+ }
+ #[cfg(not(target_os = "unix"))]
+ fn os_str_to_bytes<'tcx, 'a>(os_str: &'a OsStr) -> InterpResult<'tcx, &'a [u8]> {
+ // On non-unix platforms the best we can do to transform bytes from/to OS strings is to do the
+ // intermediate transformation into strings. Which invalidates non-utf8 paths that are actually
+ // valid.
+ os_str
+ .to_str()
+ .map(|s| s.as_bytes())
+ .ok_or_else(|| err_unsup_format!("{:?} is not a valid utf-8 string", os_str).into())
+ }
+
let bytes = os_str_to_bytes(os_str)?;
- let len = bytes.len();
// If `size` is smaller or equal than `bytes.len()`, writing `bytes` plus the required null
- // terminator to memory using the `ptr` pointer would cause an overflow.
- if size <= len as u64 {
- throw_unsup_format!("OsString of length {} is too large for destination buffer of size {}", len, size)
+ // terminator to memory using the `ptr` pointer would cause an out-of-bounds access.
+ let string_length = u64::try_from(bytes.len()).unwrap();
+ if size <= string_length {
+ return Ok((false, string_length));
}
- let actual_len = (len as u64)
- .checked_add(1)
- .map(Size::from_bytes)
- .ok_or_else(|| err_unsup_format!("OsString of length {} is too large", len))?;
- let this = self.eval_context_mut();
- this.memory.check_ptr_access(ptr.into(), actual_len, Align::from_bytes(1).unwrap())?;
- let buffer = this.memory.get_mut(ptr.alloc_id)?.get_bytes_mut(&*this.tcx, ptr, actual_len)?;
- buffer[..len].copy_from_slice(bytes);
- // This is ok because the buffer was strictly larger than `bytes`, so after adding the
- // null terminator, the buffer size is larger or equal to `bytes.len()`, meaning that
- // `bytes` actually fit inside tbe buffer.
- buffer[len] = 0;
- Ok(())
+ self.eval_context_mut()
+ .memory
+ .write_bytes(scalar, bytes.iter().copied().chain(iter::once(0u8)))?;
+ Ok((true, string_length))
}
-}
-#[cfg(target_os = "unix")]
-fn os_str_to_bytes<'tcx, 'a>(os_str: &'a OsStr) -> InterpResult<'tcx, &'a [u8]> {
- std::os::unix::ffi::OsStringExt::into_bytes(os_str)
-}
+ fn alloc_os_str_as_c_str(
+ &mut self,
+ os_str: &OsStr,
+ memkind: MemoryKind<MiriMemoryKind>,
+ ) -> Pointer<Tag> {
+ let size = u64::try_from(os_str.len()).unwrap().checked_add(1).unwrap(); // Make space for `0` terminator.
+ let this = self.eval_context_mut();
-#[cfg(target_os = "unix")]
-fn bytes_to_os_str<'tcx, 'a>(bytes: &'a[u8]) -> InterpResult<'tcx, &'a OsStr> {
- Ok(std::os::unix::ffi::OsStringExt::from_bytes(bytes))
+ let arg_type = this.tcx.mk_array(this.tcx.types.u8, size);
+ let arg_place = this.allocate(this.layout_of(arg_type).unwrap(), memkind);
+ self.write_os_str_to_c_str(os_str, arg_place.ptr, size).unwrap();
+ arg_place.ptr.assert_ptr()
+ }
}
-// On non-unix platforms the best we can do to transform bytes from/to OS strings is to do the
-// intermediate transformation into strings. Which invalidates non-utf8 paths that are actually
-// valid.
-#[cfg(not(target_os = "unix"))]
-fn os_str_to_bytes<'tcx, 'a>(os_str: &'a OsStr) -> InterpResult<'tcx, &'a [u8]> {
- os_str
- .to_str()
- .map(|s| s.as_bytes())
- .ok_or_else(|| err_unsup_format!("{:?} is not a valid utf-8 string", os_str).into())
+pub fn immty_from_int_checked<'tcx>(
+ int: impl Into<i128>,
+ layout: TyLayout<'tcx>,
+) -> InterpResult<'tcx, ImmTy<'tcx, Tag>> {
+ let int = int.into();
+ Ok(ImmTy::try_from_int(int, layout).ok_or_else(|| {
+ err_unsup_format!("signed value {:#x} does not fit in {} bits", int, layout.size.bits())
+ })?)
}
-#[cfg(not(target_os = "unix"))]
-fn bytes_to_os_str<'tcx, 'a>(bytes: &'a[u8]) -> InterpResult<'tcx, &'a OsStr> {
- let s = std::str::from_utf8(bytes)
- .map_err(|_| err_unsup_format!("{:?} is not a valid utf-8 string", bytes))?;
- Ok(&OsStr::new(s))
+pub fn immty_from_uint_checked<'tcx>(
+ int: impl Into<u128>,
+ layout: TyLayout<'tcx>,
+) -> InterpResult<'tcx, ImmTy<'tcx, Tag>> {
+ let int = int.into();
+ Ok(ImmTy::try_from_uint(int, layout).ok_or_else(|| {
+ err_unsup_format!("unsigned value {:#x} does not fit in {} bits", int, layout.size.bits())
+ })?)
}
projects / rust.git / blobdiff