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renamed ScalarMaybeUninit::not_undef to check_init

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Renamed the function ScalarMaybeUninit::not_undef to ScalarMaybeUninit::check_init in the file src/librustc_middle/mir/interpret/value.rs, to reflect changes in terminology used.

Related issue rust-lang#71193
This commit is contained in:
Philippe Nadon 2020-07-21 15:17:32 -06:00
parent e8b55a4ad2
commit 55984b65ce
10 changed files with 36 additions and 36 deletions
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2
src/librustc_codegen_ssa/mir/block.rs
View file

@ -888,7 +888,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
let ptr = Pointer::new(AllocId(0), offset);
alloc
.read_scalar(&bx, ptr, size)
.and_then(|s| s.not_undef())
.and_then(|s| s.check_init())
.unwrap_or_else(|e| {
bx.tcx().sess.span_err(
span,

30
src/librustc_middle/mir/interpret/value.rs
View file

@ -606,7 +606,7 @@ impl<'tcx, Tag> ScalarMaybeUninit<Tag> {
}
#[inline]
pub fn not_undef(self) -> InterpResult<'static, Scalar<Tag>> {
pub fn check_init(self) -> InterpResult<'static, Scalar<Tag>> {
match self {
ScalarMaybeUninit::Scalar(scalar) => Ok(scalar),
ScalarMaybeUninit::Uninit => throw_ub!(InvalidUninitBytes(None)),
@ -615,72 +615,72 @@ impl<'tcx, Tag> ScalarMaybeUninit<Tag> {
#[inline(always)]
pub fn to_bool(self) -> InterpResult<'tcx, bool> {
self.not_undef()?.to_bool()
self.check_init()?.to_bool()
}
#[inline(always)]
pub fn to_char(self) -> InterpResult<'tcx, char> {
self.not_undef()?.to_char()
self.check_init()?.to_char()
}
#[inline(always)]
pub fn to_f32(self) -> InterpResult<'tcx, Single> {
self.not_undef()?.to_f32()
self.check_init()?.to_f32()
}
#[inline(always)]
pub fn to_f64(self) -> InterpResult<'tcx, Double> {
self.not_undef()?.to_f64()
self.check_init()?.to_f64()
}
#[inline(always)]
pub fn to_u8(self) -> InterpResult<'tcx, u8> {
self.not_undef()?.to_u8()
self.check_init()?.to_u8()
}
#[inline(always)]
pub fn to_u16(self) -> InterpResult<'tcx, u16> {
self.not_undef()?.to_u16()
self.check_init()?.to_u16()
}
#[inline(always)]
pub fn to_u32(self) -> InterpResult<'tcx, u32> {
self.not_undef()?.to_u32()
self.check_init()?.to_u32()
}
#[inline(always)]
pub fn to_u64(self) -> InterpResult<'tcx, u64> {
self.not_undef()?.to_u64()
self.check_init()?.to_u64()
}
#[inline(always)]
pub fn to_machine_usize(self, cx: &impl HasDataLayout) -> InterpResult<'tcx, u64> {
self.not_undef()?.to_machine_usize(cx)
self.check_init()?.to_machine_usize(cx)
}
#[inline(always)]
pub fn to_i8(self) -> InterpResult<'tcx, i8> {
self.not_undef()?.to_i8()
self.check_init()?.to_i8()
}
#[inline(always)]
pub fn to_i16(self) -> InterpResult<'tcx, i16> {
self.not_undef()?.to_i16()
self.check_init()?.to_i16()
}
#[inline(always)]
pub fn to_i32(self) -> InterpResult<'tcx, i32> {
self.not_undef()?.to_i32()
self.check_init()?.to_i32()
}
#[inline(always)]
pub fn to_i64(self) -> InterpResult<'tcx, i64> {
self.not_undef()?.to_i64()
self.check_init()?.to_i64()
}
#[inline(always)]
pub fn to_machine_isize(self, cx: &impl HasDataLayout) -> InterpResult<'tcx, i64> {
self.not_undef()?.to_machine_isize(cx)
self.check_init()?.to_machine_isize(cx)
}
}

2
src/librustc_mir/const_eval/eval_queries.rs
View file

@ -154,7 +154,7 @@ pub(super) fn op_to_const<'tcx>(
ScalarMaybeUninit::Uninit => to_const_value(op.assert_mem_place(ecx)),
},
Immediate::ScalarPair(a, b) => {
let (data, start) = match a.not_undef().unwrap() {
let (data, start) = match a.check_init().unwrap() {
Scalar::Ptr(ptr) => {
(ecx.tcx.global_alloc(ptr.alloc_id).unwrap_memory(), ptr.offset.bytes())
}

10
src/librustc_mir/interpret/intrinsics.rs
View file

@ -150,7 +150,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
| sym::bitreverse => {
let ty = substs.type_at(0);
let layout_of = self.layout_of(ty)?;
let val = self.read_scalar(args[0])?.not_undef()?;
let val = self.read_scalar(args[0])?.check_init()?;
let bits = self.force_bits(val, layout_of.size)?;
let kind = match layout_of.abi {
Abi::Scalar(ref scalar) => scalar.value,
@ -281,9 +281,9 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// rotate_left: (X << (S % BW)) | (X >> ((BW - S) % BW))
// rotate_right: (X << ((BW - S) % BW)) | (X >> (S % BW))
let layout = self.layout_of(substs.type_at(0))?;
let val = self.read_scalar(args[0])?.not_undef()?;
let val = self.read_scalar(args[0])?.check_init()?;
let val_bits = self.force_bits(val, layout.size)?;
let raw_shift = self.read_scalar(args[1])?.not_undef()?;
let raw_shift = self.read_scalar(args[1])?.check_init()?;
let raw_shift_bits = self.force_bits(raw_shift, layout.size)?;
let width_bits = u128::from(layout.size.bits());
let shift_bits = raw_shift_bits % width_bits;
@ -298,7 +298,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
self.write_scalar(result, dest)?;
}
sym::offset => {
let ptr = self.read_scalar(args[0])?.not_undef()?;
let ptr = self.read_scalar(args[0])?.check_init()?;
let offset_count = self.read_scalar(args[1])?.to_machine_isize(self)?;
let pointee_ty = substs.type_at(0);
@ -306,7 +306,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
self.write_scalar(offset_ptr, dest)?;
}
sym::arith_offset => {
let ptr = self.read_scalar(args[0])?.not_undef()?;
let ptr = self.read_scalar(args[0])?.check_init()?;
let offset_count = self.read_scalar(args[1])?.to_machine_isize(self)?;
let pointee_ty = substs.type_at(0);

4
src/librustc_mir/interpret/operand.rs
View file

@ -72,14 +72,14 @@ impl<'tcx, Tag> Immediate<Tag> {
#[inline]
pub fn to_scalar(self) -> InterpResult<'tcx, Scalar<Tag>> {
self.to_scalar_or_undef().not_undef()
self.to_scalar_or_undef().check_init()
}
#[inline]
pub fn to_scalar_pair(self) -> InterpResult<'tcx, (Scalar<Tag>, Scalar<Tag>)> {
match self {
Immediate::Scalar(..) => bug!("Got a thin pointer where a scalar pair was expected"),
Immediate::ScalarPair(a, b) => Ok((a.not_undef()?, b.not_undef()?)),
Immediate::ScalarPair(a, b) => Ok((a.check_init()?, b.check_init()?)),
}
}
}

6
src/librustc_mir/interpret/place.rs
View file

@ -292,9 +292,9 @@ where
val.layout.ty.builtin_deref(true).expect("`ref_to_mplace` called on non-ptr type").ty;
let layout = self.layout_of(pointee_type)?;
let (ptr, meta) = match *val {
Immediate::Scalar(ptr) => (ptr.not_undef()?, MemPlaceMeta::None),
Immediate::Scalar(ptr) => (ptr.check_init()?, MemPlaceMeta::None),
Immediate::ScalarPair(ptr, meta) => {
(ptr.not_undef()?, MemPlaceMeta::Meta(meta.not_undef()?))
(ptr.check_init()?, MemPlaceMeta::Meta(meta.check_init()?))
}
};
@ -541,7 +541,7 @@ where
let n = self.access_local(self.frame(), local, Some(layout))?;
let n = self.read_scalar(n)?;
let n = u64::try_from(
self.force_bits(n.not_undef()?, self.tcx.data_layout.pointer_size)?,
self.force_bits(n.check_init()?, self.tcx.data_layout.pointer_size)?,
)
.unwrap();
self.mplace_index(base, n)?

2
src/librustc_mir/interpret/terminator.rs
View file

@ -58,7 +58,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
let (fn_val, abi) = match func.layout.ty.kind {
ty::FnPtr(sig) => {
let caller_abi = sig.abi();
let fn_ptr = self.read_scalar(func)?.not_undef()?;
let fn_ptr = self.read_scalar(func)?.check_init()?;
let fn_val = self.memory.get_fn(fn_ptr)?;
(fn_val, caller_abi)
}

8
src/librustc_mir/interpret/traits.rs
View file

@ -118,7 +118,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
.memory
.get_raw(vtable_slot.alloc_id)?
.read_ptr_sized(self, vtable_slot)?
.not_undef()?;
.check_init()?;
Ok(self.memory.get_fn(fn_ptr)?)
}
@ -137,7 +137,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
)?
.expect("cannot be a ZST");
let drop_fn =
self.memory.get_raw(vtable.alloc_id)?.read_ptr_sized(self, vtable)?.not_undef()?;
self.memory.get_raw(vtable.alloc_id)?.read_ptr_sized(self, vtable)?.check_init()?;
// We *need* an instance here, no other kind of function value, to be able
// to determine the type.
let drop_instance = self.memory.get_fn(drop_fn)?.as_instance()?;
@ -165,10 +165,10 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
.check_ptr_access(vtable, 3 * pointer_size, self.tcx.data_layout.pointer_align.abi)?
.expect("cannot be a ZST");
let alloc = self.memory.get_raw(vtable.alloc_id)?;
let size = alloc.read_ptr_sized(self, vtable.offset(pointer_size, self)?)?.not_undef()?;
let size = alloc.read_ptr_sized(self, vtable.offset(pointer_size, self)?)?.check_init()?;
let size = u64::try_from(self.force_bits(size, pointer_size)?).unwrap();
let align =
alloc.read_ptr_sized(self, vtable.offset(pointer_size * 2, self)?)?.not_undef()?;
alloc.read_ptr_sized(self, vtable.offset(pointer_size * 2, self)?)?.check_init()?;
let align = u64::try_from(self.force_bits(align, pointer_size)?).unwrap();
if size >= self.tcx.data_layout.obj_size_bound() {

6
src/librustc_mir/interpret/validity.rs
View file

@ -500,7 +500,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
// types below!
if self.ref_tracking_for_consts.is_some() {
// Integers/floats in CTFE: Must be scalar bits, pointers are dangerous
let is_bits = value.not_undef().map_or(false, |v| v.is_bits());
let is_bits = value.check_init().map_or(false, |v| v.is_bits());
if !is_bits {
throw_validation_failure!(self.path,
{ "{}", value } expected { "initialized plain (non-pointer) bytes" }
@ -537,7 +537,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
ty::FnPtr(_sig) => {
let value = self.ecx.read_scalar(value)?;
let _fn = try_validation!(
value.not_undef().and_then(|ptr| self.ecx.memory.get_fn(ptr)),
value.check_init().and_then(|ptr| self.ecx.memory.get_fn(ptr)),
self.path,
err_ub!(DanglingIntPointer(..)) |
err_ub!(InvalidFunctionPointer(..)) |
@ -596,7 +596,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
}
// At least one value is excluded. Get the bits.
let value = try_validation!(
value.not_undef(),
value.check_init(),
self.path,
err_ub!(InvalidUninitBytes(None)) => { "{}", value }
expected { "something {}", wrapping_range_format(valid_range, max_hi) },

2
src/librustc_mir_build/hair/pattern/_match.rs
View file

@ -2614,7 +2614,7 @@ fn specialize_one_pattern<'p, 'tcx>(
let pats = cx.pattern_arena.alloc_from_iter((0..n).filter_map(|i| {
let ptr = ptr.offset(layout.size * i, &cx.tcx).ok()?;
let scalar = alloc.read_scalar(&cx.tcx, ptr, layout.size).ok()?;
let scalar = scalar.not_undef().ok()?;
let scalar = scalar.check_init().ok()?;
let value = ty::Const::from_scalar(cx.tcx, scalar, ty);
let pattern = Pat { ty, span: pat.span, kind: box PatKind::Constant { value } };
Some(pattern)