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interpret: make MemPlace, Place, Operand types private to the interpreter

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This commit is contained in:
Ralf Jung 2023-09-04 17:53:38 +02:00
parent a989e25f1b
commit fa5f13775a
41 changed files with 417 additions and 338 deletions
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6
compiler/rustc_const_eval/src/const_eval/eval_queries.rs
View File

@ -79,7 +79,7 @@ fn eval_body_using_ecx<'mir, 'tcx>(
intern_const_alloc_recursive(ecx, intern_kind, &ret)?;
// we leave alignment checks off, since this `ecx` will not be used for further evaluation anyway
debug!("eval_body_using_ecx done: {:?}", *ret);
debug!("eval_body_using_ecx done: {:?}", ret);
Ok(ret)
}
@ -147,7 +147,7 @@ pub(super) fn op_to_const<'tcx>(
// We know `offset` is relative to the allocation, so we can use `into_parts`.
let to_const_value = |mplace: &MPlaceTy<'_>| {
debug!("to_const_value(mplace: {:?})", mplace);
match mplace.ptr.into_parts() {
match mplace.ptr().into_parts() {
(Some(alloc_id), offset) => {
let alloc = ecx.tcx.global_alloc(alloc_id).unwrap_memory();
ConstValue::ByRef { alloc, offset }
@ -370,7 +370,7 @@ pub fn eval_to_allocation_raw_provider<'tcx>(
inner = true;
}
};
let alloc_id = mplace.ptr.provenance.unwrap();
let alloc_id = mplace.ptr().provenance.unwrap();
// Validation failed, report an error. This is always a hard error.
if let Err(error) = validation {

2
compiler/rustc_const_eval/src/const_eval/mod.rs
View File

@ -30,7 +30,7 @@ pub(crate) fn const_caller_location(
if intern_const_alloc_recursive(&mut ecx, InternKind::Constant, &loc_place).is_err() {
bug!("intern_const_alloc_recursive should not error in this case")
}
ConstValue::Scalar(Scalar::from_maybe_pointer(loc_place.ptr, &tcx))
ConstValue::Scalar(Scalar::from_maybe_pointer(loc_place.ptr(), &tcx))
}
// We forbid type-level constants that contain more than `VALTREE_MAX_NODES` nodes.

6
compiler/rustc_const_eval/src/const_eval/valtrees.rs
View File

@ -5,7 +5,7 @@ use crate::const_eval::CanAccessStatics;
use crate::interpret::MPlaceTy;
use crate::interpret::{
intern_const_alloc_recursive, ConstValue, ImmTy, Immediate, InternKind, MemPlaceMeta,
MemoryKind, Place, Projectable, Scalar,
MemoryKind, PlaceTy, Projectable, Scalar,
};
use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt};
@ -318,7 +318,7 @@ fn valtree_into_mplace<'tcx>(
let len_scalar = Scalar::from_target_usize(len as u64, &tcx);
Immediate::ScalarPair(
Scalar::from_maybe_pointer((*pointee_place).ptr, &tcx),
Scalar::from_maybe_pointer(pointee_place.ptr(), &tcx),
len_scalar,
)
}
@ -383,5 +383,5 @@ fn valtree_into_mplace<'tcx>(
}
fn dump_place<'tcx>(ecx: &CompileTimeEvalContext<'tcx, 'tcx>, place: &MPlaceTy<'tcx>) {
trace!("{:?}", ecx.dump_place(Place::Ptr(**place)));
trace!("{:?}", ecx.dump_place(&PlaceTy::from(place.clone())));
}

61
compiler/rustc_const_eval/src/interpret/eval_context.rs
View File

@ -21,8 +21,8 @@ use rustc_target::abi::{call::FnAbi, Align, HasDataLayout, Size, TargetDataLayou
use super::{
AllocId, GlobalId, Immediate, InterpErrorInfo, InterpResult, MPlaceTy, Machine, MemPlace,
MemPlaceMeta, Memory, MemoryKind, Operand, Place, PlaceTy, PointerArithmetic, Provenance,
Scalar, StackPopJump,
MemPlaceMeta, Memory, MemoryKind, Operand, Place, PlaceTy, Pointer, PointerArithmetic,
Projectable, Provenance, Scalar, StackPopJump,
};
use crate::errors::{self, ErroneousConstUsed};
use crate::util;
@ -155,17 +155,26 @@ pub enum StackPopCleanup {
}
/// State of a local variable including a memoized layout
#[derive(Clone, Debug)]
#[derive(Clone)]
pub struct LocalState<'tcx, Prov: Provenance = AllocId> {
pub value: LocalValue<Prov>,
value: LocalValue<Prov>,
/// Don't modify if `Some`, this is only used to prevent computing the layout twice.
/// Avoids computing the layout of locals that are never actually initialized.
pub layout: Cell<Option<TyAndLayout<'tcx>>>,
layout: Cell<Option<TyAndLayout<'tcx>>>,
}
impl<Prov: Provenance> std::fmt::Debug for LocalState<'_, Prov> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("LocalState")
.field("value", &self.value)
.field("ty", &self.layout.get().map(|l| l.ty))
.finish()
}
}
/// Current value of a local variable
#[derive(Copy, Clone, Debug)] // Miri debug-prints these
pub enum LocalValue<Prov: Provenance = AllocId> {
pub(super) enum LocalValue<Prov: Provenance = AllocId> {
/// This local is not currently alive, and cannot be used at all.
Dead,
/// A normal, live local.
@ -176,10 +185,27 @@ pub enum LocalValue<Prov: Provenance = AllocId> {
Live(Operand<Prov>),
}
impl<'tcx, Prov: Provenance + 'static> LocalState<'tcx, Prov> {
impl<'tcx, Prov: Provenance> LocalState<'tcx, Prov> {
pub fn make_live_uninit(&mut self) {
self.value = LocalValue::Live(Operand::Immediate(Immediate::Uninit));
}
/// This is a hack because Miri needs a way to visit all the provenance in a `LocalState`
/// without having a layout or `TyCtxt` available, and we want to keep the `Operand` type
/// private.
pub fn as_mplace_or_imm(
&self,
) -> Option<Either<(Pointer<Option<Prov>>, MemPlaceMeta<Prov>), Immediate<Prov>>> {
match self.value {
LocalValue::Dead => None,
LocalValue::Live(Operand::Indirect(mplace)) => Some(Left((mplace.ptr, mplace.meta))),
LocalValue::Live(Operand::Immediate(imm)) => Some(Right(imm)),
}
}
/// Read the local's value or error if the local is not yet live or not live anymore.
#[inline(always)]
pub fn access(&self) -> InterpResult<'tcx, &Operand<Prov>> {
pub(super) fn access(&self) -> InterpResult<'tcx, &Operand<Prov>> {
match &self.value {
LocalValue::Dead => throw_ub!(DeadLocal), // could even be "invalid program"?
LocalValue::Live(val) => Ok(val),
@ -189,10 +215,10 @@ impl<'tcx, Prov: Provenance + 'static> LocalState<'tcx, Prov> {
/// Overwrite the local. If the local can be overwritten in place, return a reference
/// to do so; otherwise return the `MemPlace` to consult instead.
///
/// Note: This may only be invoked from the `Machine::access_local_mut` hook and not from
/// anywhere else. You may be invalidating machine invariants if you do!
/// Note: Before calling this, call the `before_access_local_mut` machine hook! You may be
/// invalidating machine invariants otherwise!
#[inline(always)]
pub fn access_mut(&mut self) -> InterpResult<'tcx, &mut Operand<Prov>> {
pub(super) fn access_mut(&mut self) -> InterpResult<'tcx, &mut Operand<Prov>> {
match &mut self.value {
LocalValue::Dead => throw_ub!(DeadLocal), // could even be "invalid program"?
LocalValue::Live(val) => Ok(val),
@ -694,7 +720,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
&self,
mplace: &MPlaceTy<'tcx, M::Provenance>,
) -> InterpResult<'tcx, Option<(Size, Align)>> {
self.size_and_align_of(&mplace.meta, &mplace.layout)
self.size_and_align_of(&mplace.meta(), &mplace.layout)
}
#[instrument(skip(self, body, return_place, return_to_block), level = "debug")]
@ -826,7 +852,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
.expect("return place should always be live");
let dest = self.frame().return_place.clone();
let err = self.copy_op(&op, &dest, /*allow_transmute*/ true);
trace!("return value: {:?}", self.dump_place(*dest));
trace!("return value: {:?}", self.dump_place(&dest));
// We delay actually short-circuiting on this error until *after* the stack frame is
// popped, since we want this error to be attributed to the caller, whose type defines
// this transmute.
@ -974,7 +1000,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
// Need to allocate some memory, since `Immediate::Uninit` cannot be unsized.
let dest_place = self.allocate_dyn(layout, MemoryKind::Stack, meta)?;
Operand::Indirect(*dest_place)
Operand::Indirect(*dest_place.mplace())
} else {
assert!(!meta.has_meta()); // we're dropping the metadata
// Just make this an efficient immediate.
@ -1068,8 +1094,11 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
#[must_use]
pub fn dump_place(&self, place: Place<M::Provenance>) -> PlacePrinter<'_, 'mir, 'tcx, M> {
PlacePrinter { ecx: self, place }
pub fn dump_place(
&self,
place: &PlaceTy<'tcx, M::Provenance>,
) -> PlacePrinter<'_, 'mir, 'tcx, M> {
PlacePrinter { ecx: self, place: *place.place() }
}
#[must_use]

12
compiler/rustc_const_eval/src/interpret/intern.rs
View File

@ -25,7 +25,7 @@ use rustc_ast::Mutability;
use super::{
AllocId, Allocation, ConstAllocation, InterpCx, MPlaceTy, Machine, MemoryKind, PlaceTy,
ValueVisitor,
Projectable, ValueVisitor,
};
use crate::const_eval;
use crate::errors::{DanglingPtrInFinal, UnsupportedUntypedPointer};
@ -177,7 +177,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: CompileTimeMachine<'mir, 'tcx, const_eval::Memory
if let ty::Dynamic(_, _, ty::Dyn) =
tcx.struct_tail_erasing_lifetimes(referenced_ty, self.ecx.param_env).kind()
{
let ptr = mplace.meta.unwrap_meta().to_pointer(&tcx)?;
let ptr = mplace.meta().unwrap_meta().to_pointer(&tcx)?;
if let Some(alloc_id) = ptr.provenance {
// Explicitly choose const mode here, since vtables are immutable, even
// if the reference of the fat pointer is mutable.
@ -191,7 +191,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: CompileTimeMachine<'mir, 'tcx, const_eval::Memory
}
// Check if we have encountered this pointer+layout combination before.
// Only recurse for allocation-backed pointers.
if let Some(alloc_id) = mplace.ptr.provenance {
if let Some(alloc_id) = mplace.ptr().provenance {
// Compute the mode with which we intern this. Our goal here is to make as many
// statics as we can immutable so they can be placed in read-only memory by LLVM.
let ref_mode = match self.mode {
@ -267,7 +267,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: CompileTimeMachine<'mir, 'tcx, const_eval::Memory
// If there is no provenance in this allocation, it does not contain references
// that point to another allocation, and we can avoid the interning walk.
if let Some(alloc) = self.ecx.get_ptr_alloc(mplace.ptr, size, align)? {
if let Some(alloc) = self.ecx.get_ptr_alloc(mplace.ptr(), size, align)? {
if !alloc.has_provenance() {
return Ok(false);
}
@ -353,7 +353,7 @@ pub fn intern_const_alloc_recursive<
leftover_allocations,
// The outermost allocation must exist, because we allocated it with
// `Memory::allocate`.
ret.ptr.provenance.unwrap(),
ret.ptr().provenance.unwrap(),
base_intern_mode,
Some(ret.layout.ty),
);
@ -466,7 +466,7 @@ impl<'mir, 'tcx: 'mir, M: super::intern::CompileTimeMachine<'mir, 'tcx, !>>
) -> InterpResult<'tcx, ConstAllocation<'tcx>> {
let dest = self.allocate(layout, MemoryKind::Stack)?;
f(self, &dest.clone().into())?;
let mut alloc = self.memory.alloc_map.remove(&dest.ptr.provenance.unwrap()).unwrap().1;
let mut alloc = self.memory.alloc_map.remove(&dest.ptr().provenance.unwrap()).unwrap().1;
alloc.mutability = Mutability::Not;
Ok(self.tcx.mk_const_alloc(alloc))
}

2
compiler/rustc_const_eval/src/interpret/intrinsics.rs
View File

@ -466,7 +466,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
_ => return Ok(false),
}
trace!("{:?}", self.dump_place(**dest));
trace!("{:?}", self.dump_place(dest));
self.go_to_block(ret);
Ok(true)
}

18
compiler/rustc_const_eval/src/interpret/machine.rs
View File

@ -18,7 +18,7 @@ use crate::const_eval::CheckAlignment;
use super::{
AllocBytes, AllocId, AllocRange, Allocation, ConstAllocation, FnArg, Frame, ImmTy, InterpCx,
InterpResult, MPlaceTy, MemoryKind, OpTy, Operand, PlaceTy, Pointer, Provenance, Scalar,
InterpResult, MPlaceTy, MemoryKind, OpTy, PlaceTy, Pointer, Provenance, Scalar,
};
/// Data returned by Machine::stack_pop,
@ -237,22 +237,22 @@ pub trait Machine<'mir, 'tcx: 'mir>: Sized {
right: &ImmTy<'tcx, Self::Provenance>,
) -> InterpResult<'tcx, (Scalar<Self::Provenance>, bool, Ty<'tcx>)>;
/// Called to write the specified `local` from the `frame`.
/// Called before writing the specified `local` of the `frame`.
/// Since writing a ZST is not actually accessing memory or locals, this is never invoked
/// for ZST reads.
///
/// Due to borrow checker trouble, we indicate the `frame` as an index rather than an `&mut
/// Frame`.
#[inline]
fn access_local_mut<'a>(
ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
frame: usize,
local: mir::Local,
) -> InterpResult<'tcx, &'a mut Operand<Self::Provenance>>
#[inline(always)]
fn before_access_local_mut<'a>(
_ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
_frame: usize,
_local: mir::Local,
) -> InterpResult<'tcx>
where
'tcx: 'mir,
{
ecx.stack_mut()[frame].locals[local].access_mut()
Ok(())
}
/// Called before a basic block terminator is executed.

11
compiler/rustc_const_eval/src/interpret/mod.rs
View File

@ -20,16 +20,21 @@ mod visitor;
pub use rustc_middle::mir::interpret::*; // have all the `interpret` symbols in one place: here
pub use self::eval_context::{Frame, FrameInfo, InterpCx, LocalState, LocalValue, StackPopCleanup};
pub use self::eval_context::{Frame, FrameInfo, InterpCx, StackPopCleanup};
pub use self::intern::{intern_const_alloc_recursive, InternKind};
pub use self::machine::{compile_time_machine, AllocMap, Machine, MayLeak, StackPopJump};
pub use self::memory::{AllocKind, AllocRef, AllocRefMut, FnVal, Memory, MemoryKind};
pub use self::operand::{ImmTy, Immediate, OpTy, Operand, Readable};
pub use self::place::{MPlaceTy, MemPlace, MemPlaceMeta, Place, PlaceTy, Writeable};
pub use self::operand::{ImmTy, Immediate, OpTy, Readable};
pub use self::place::{MPlaceTy, MemPlaceMeta, PlaceTy, Writeable};
pub use self::projection::Projectable;
pub use self::terminator::FnArg;
pub use self::validity::{CtfeValidationMode, RefTracking};
pub use self::visitor::ValueVisitor;
use self::{
operand::Operand,
place::{MemPlace, Place},
};
pub(crate) use self::intrinsics::eval_nullary_intrinsic;
use eval_context::{from_known_layout, mir_assign_valid_types};

122
compiler/rustc_const_eval/src/interpret/operand.rs
View File

@ -88,7 +88,7 @@ impl<Prov: Provenance> Immediate<Prov> {
// ScalarPair needs a type to interpret, so we often have an immediate and a type together
// as input for binary and cast operations.
#[derive(Clone, Debug)]
#[derive(Clone)]
pub struct ImmTy<'tcx, Prov: Provenance = AllocId> {
imm: Immediate<Prov>,
pub layout: TyAndLayout<'tcx>,
@ -134,6 +134,12 @@ impl<Prov: Provenance> std::fmt::Display for ImmTy<'_, Prov> {
}
}
impl<Prov: Provenance> std::fmt::Debug for ImmTy<'_, Prov> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("ImmTy").field("imm", &self.imm).field("ty", &self.layout.ty).finish()
}
}
impl<'tcx, Prov: Provenance> std::ops::Deref for ImmTy<'tcx, Prov> {
type Target = Immediate<Prov>;
#[inline(always)]
@ -142,51 +148,6 @@ impl<'tcx, Prov: Provenance> std::ops::Deref for ImmTy<'tcx, Prov> {
}
}
/// An `Operand` is the result of computing a `mir::Operand`. It can be immediate,
/// or still in memory. The latter is an optimization, to delay reading that chunk of
/// memory and to avoid having to store arbitrary-sized data here.
#[derive(Copy, Clone, Debug)]
pub enum Operand<Prov: Provenance = AllocId> {
Immediate(Immediate<Prov>),
Indirect(MemPlace<Prov>),
}
#[derive(Clone, Debug)]
pub struct OpTy<'tcx, Prov: Provenance = AllocId> {
op: Operand<Prov>, // Keep this private; it helps enforce invariants.
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for an `OpTy`!
/// `None` means "alignment does not matter since this is a by-value operand"
/// (`Operand::Immediate`); this field is only relevant for `Operand::Indirect`.
/// Also CTFE ignores alignment anyway, so this is for Miri only.
pub align: Option<Align>,
}
impl<'tcx, Prov: Provenance> std::ops::Deref for OpTy<'tcx, Prov> {
type Target = Operand<Prov>;
#[inline(always)]
fn deref(&self) -> &Operand<Prov> {
&self.op
}
}
impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov> {
#[inline(always)]
fn from(mplace: MPlaceTy<'tcx, Prov>) -> Self {
OpTy { op: Operand::Indirect(*mplace), layout: mplace.layout, align: Some(mplace.align) }
}
}
impl<'tcx, Prov: Provenance> From<ImmTy<'tcx, Prov>> for OpTy<'tcx, Prov> {
#[inline(always)]
fn from(val: ImmTy<'tcx, Prov>) -> Self {
OpTy { op: Operand::Immediate(val.imm), layout: val.layout, align: None }
}
}
impl<'tcx, Prov: Provenance> ImmTy<'tcx, Prov> {
#[inline]
pub fn from_scalar(val: Scalar<Prov>, layout: TyAndLayout<'tcx>) -> Self {
@ -319,7 +280,61 @@ impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for ImmTy<'tcx, Prov> {
}
}
impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for OpTy<'tcx, Prov> {
/// An `Operand` is the result of computing a `mir::Operand`. It can be immediate,
/// or still in memory. The latter is an optimization, to delay reading that chunk of
/// memory and to avoid having to store arbitrary-sized data here.
#[derive(Copy, Clone, Debug)]
pub(super) enum Operand<Prov: Provenance = AllocId> {
Immediate(Immediate<Prov>),
Indirect(MemPlace<Prov>),
}
#[derive(Clone)]
pub struct OpTy<'tcx, Prov: Provenance = AllocId> {
op: Operand<Prov>, // Keep this private; it helps enforce invariants.
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for an `OpTy`!
/// `None` means "alignment does not matter since this is a by-value operand"
/// (`Operand::Immediate`); this field is only relevant for `Operand::Indirect`.
/// Also CTFE ignores alignment anyway, so this is for Miri only.
pub align: Option<Align>,
}
impl<Prov: Provenance> std::fmt::Debug for OpTy<'_, Prov> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("OpTy").field("op", &self.op).field("ty", &self.layout.ty).finish()
}
}
impl<'tcx, Prov: Provenance> From<ImmTy<'tcx, Prov>> for OpTy<'tcx, Prov> {
#[inline(always)]
fn from(val: ImmTy<'tcx, Prov>) -> Self {
OpTy { op: Operand::Immediate(val.imm), layout: val.layout, align: None }
}
}
impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov> {
#[inline(always)]
fn from(mplace: MPlaceTy<'tcx, Prov>) -> Self {
OpTy {
op: Operand::Indirect(*mplace.mplace()),
layout: mplace.layout,
align: Some(mplace.align),
}
}
}
impl<'tcx, Prov: Provenance> OpTy<'tcx, Prov> {
#[inline(always)]
pub(super) fn op(&self) -> &Operand<Prov> {
&self.op
}
}
impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for OpTy<'tcx, Prov> {
#[inline(always)]
fn layout(&self) -> TyAndLayout<'tcx> {
self.layout
@ -328,7 +343,7 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for OpTy<'tcx, Pr
#[inline]
fn meta(&self) -> MemPlaceMeta<Prov> {
match self.as_mplace_or_imm() {
Left(mplace) => mplace.meta,
Left(mplace) => mplace.meta(),
Right(_) => {
debug_assert!(self.layout.is_sized(), "unsized immediates are not a thing");
MemPlaceMeta::None
@ -362,18 +377,19 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for OpTy<'tcx, Pr
}
}
/// The `Readable` trait describes interpreter values that one can read from.
pub trait Readable<'tcx, Prov: Provenance>: Projectable<'tcx, Prov> {
fn as_mplace_or_imm(&self) -> Either<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>>;
}
impl<'tcx, Prov: Provenance + 'static> Readable<'tcx, Prov> for OpTy<'tcx, Prov> {
impl<'tcx, Prov: Provenance> Readable<'tcx, Prov> for OpTy<'tcx, Prov> {
#[inline(always)]
fn as_mplace_or_imm(&self) -> Either<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>> {
self.as_mplace_or_imm()
}
}
impl<'tcx, Prov: Provenance + 'static> Readable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
impl<'tcx, Prov: Provenance> Readable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
#[inline(always)]
fn as_mplace_or_imm(&self) -> Either<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>> {
Left(self.clone())
@ -535,7 +551,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
/// Turn the wide MPlace into a string (must already be dereferenced!)
pub fn read_str(&self, mplace: &MPlaceTy<'tcx, M::Provenance>) -> InterpResult<'tcx, &str> {
let len = mplace.len(self)?;
let bytes = self.read_bytes_ptr_strip_provenance(mplace.ptr, Size::from_bytes(len))?;
let bytes = self.read_bytes_ptr_strip_provenance(mplace.ptr(), Size::from_bytes(len))?;
let str = std::str::from_utf8(bytes).map_err(|err| err_ub!(InvalidStr(err)))?;
Ok(str)
}
@ -630,7 +646,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
op = self.project(&op, elem)?
}
trace!("eval_place_to_op: got {:?}", *op);
trace!("eval_place_to_op: got {:?}", op);
// Sanity-check the type we ended up with.
debug_assert!(
mir_assign_valid_types(
@ -673,7 +689,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
self.eval_mir_constant(&c, Some(constant.span), layout)?
}
};
trace!("{:?}: {:?}", mir_op, *op);
trace!("{:?}: {:?}", mir_op, op);
Ok(op)
}

259
compiler/rustc_const_eval/src/interpret/place.rs
View File

@ -51,7 +51,7 @@ impl<Prov: Provenance> MemPlaceMeta<Prov> {
}
#[derive(Copy, Clone, Hash, PartialEq, Eq, Debug)]
pub struct MemPlace<Prov: Provenance = AllocId> {
pub(super) struct MemPlace<Prov: Provenance = AllocId> {
/// The pointer can be a pure integer, with the `None` provenance.
pub ptr: Pointer<Option<Prov>>,
/// Metadata for unsized places. Interpretation is up to the type.
@ -60,68 +60,6 @@ pub struct MemPlace<Prov: Provenance = AllocId> {
pub meta: MemPlaceMeta<Prov>,
}
/// A MemPlace with its layout. Constructing it is only possible in this module.
#[derive(Clone, Hash, Eq, PartialEq, Debug)]
pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
mplace: MemPlace<Prov>,
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for a `MPlaceTy`!
pub align: Align,
}
impl<'tcx, Prov: Provenance> std::ops::Deref for MPlaceTy<'tcx, Prov> {
type Target = MemPlace<Prov>;
#[inline(always)]
fn deref(&self) -> &MemPlace<Prov> {
&self.mplace
}
}
#[derive(Copy, Clone, Debug)]
pub enum Place<Prov: Provenance = AllocId> {
/// A place referring to a value allocated in the `Memory` system.
Ptr(MemPlace<Prov>),
/// To support alloc-free locals, we are able to write directly to a local. The offset indicates
/// where in the local this place is located; if it is `None`, no projection has been applied.
/// Such projections are meaningful even if the offset is 0, since they can change layouts.
/// (Without that optimization, we'd just always be a `MemPlace`.)
/// Note that this only stores the frame index, not the thread this frame belongs to -- that is
/// implicit. This means a `Place` must never be moved across interpreter thread boundaries!
///
/// This variant shall not be used for unsized types -- those must always live in memory.
Local { frame: usize, local: mir::Local, offset: Option<Size> },
}
#[derive(Clone, Debug)]
pub struct PlaceTy<'tcx, Prov: Provenance = AllocId> {
place: Place<Prov>, // Keep this private; it helps enforce invariants.
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for a `PlaceTy`!
pub align: Align,
}
impl<'tcx, Prov: Provenance> std::ops::Deref for PlaceTy<'tcx, Prov> {
type Target = Place<Prov>;
#[inline(always)]
fn deref(&self) -> &Place<Prov> {
&self.place
}
}
impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov> {
#[inline(always)]
fn from(mplace: MPlaceTy<'tcx, Prov>) -> Self {
PlaceTy { place: Place::Ptr(*mplace), layout: mplace.layout, align: mplace.align }
}
}
impl<Prov: Provenance> MemPlace<Prov> {
#[inline(always)]
pub fn from_ptr(ptr: Pointer<Option<Prov>>) -> Self {
@ -165,6 +103,27 @@ impl<Prov: Provenance> MemPlace<Prov> {
}
}
/// A MemPlace with its layout. Constructing it is only possible in this module.
#[derive(Clone, Hash, Eq, PartialEq)]
pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
mplace: MemPlace<Prov>,
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for a `MPlaceTy`!
pub align: Align,
}
impl<Prov: Provenance> std::fmt::Debug for MPlaceTy<'_, Prov> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("MPlaceTy")
.field("mplace", &self.mplace)
.field("ty", &self.layout.ty)
.finish()
}
}
impl<'tcx, Prov: Provenance> MPlaceTy<'tcx, Prov> {
/// Produces a MemPlace that works for ZST but nothing else.
/// Conceptually this is a new allocation, but it doesn't actually create an allocation so you
@ -194,9 +153,29 @@ impl<'tcx, Prov: Provenance> MPlaceTy<'tcx, Prov> {
align: layout.align.abi,
}
}
/// Adjust the provenance of the main pointer (metadata is unaffected).
pub fn map_provenance(self, f: impl FnOnce(Option<Prov>) -> Option<Prov>) -> Self {
MPlaceTy { mplace: self.mplace.map_provenance(f), ..self }
}
#[inline(always)]
pub(super) fn mplace(&self) -> &MemPlace<Prov> {
&self.mplace
}
#[inline(always)]
pub fn ptr(&self) -> Pointer<Option<Prov>> {
self.mplace.ptr
}
#[inline(always)]
pub fn to_ref(&self, cx: &impl HasDataLayout) -> Immediate<Prov> {
self.mplace.to_ref(cx)
}
}
impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
#[inline(always)]
fn layout(&self) -> TyAndLayout<'tcx> {
self.layout
@ -204,7 +183,7 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for MPlaceTy<'tcx
#[inline(always)]
fn meta(&self) -> MemPlaceMeta<Prov> {
self.meta
self.mplace.meta
}
fn offset_with_meta<'mir, M: Machine<'mir, 'tcx, Provenance = Prov>>(
@ -229,7 +208,76 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for MPlaceTy<'tcx
}
}
impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for PlaceTy<'tcx, Prov> {
#[derive(Copy, Clone, Debug)]
pub(super) enum Place<Prov: Provenance = AllocId> {
/// A place referring to a value allocated in the `Memory` system.
Ptr(MemPlace<Prov>),
/// To support alloc-free locals, we are able to write directly to a local. The offset indicates
/// where in the local this place is located; if it is `None`, no projection has been applied.
/// Such projections are meaningful even if the offset is 0, since they can change layouts.
/// (Without that optimization, we'd just always be a `MemPlace`.)
/// Note that this only stores the frame index, not the thread this frame belongs to -- that is
/// implicit. This means a `Place` must never be moved across interpreter thread boundaries!
///
/// This variant shall not be used for unsized types -- those must always live in memory.
Local { frame: usize, local: mir::Local, offset: Option<Size> },
}
#[derive(Clone)]
pub struct PlaceTy<'tcx, Prov: Provenance = AllocId> {
place: Place<Prov>, // Keep this private; it helps enforce invariants.
pub layout: TyAndLayout<'tcx>,
/// rustc does not have a proper way to represent the type of a field of a `repr(packed)` struct:
/// it needs to have a different alignment than the field type would usually have.
/// So we represent this here with a separate field that "overwrites" `layout.align`.
/// This means `layout.align` should never be used for a `PlaceTy`!
pub align: Align,
}
impl<Prov: Provenance> std::fmt::Debug for PlaceTy<'_, Prov> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("PlaceTy").field("place", &self.place).field("ty", &self.layout.ty).finish()
}
}
impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov> {
#[inline(always)]
fn from(mplace: MPlaceTy<'tcx, Prov>) -> Self {
PlaceTy { place: Place::Ptr(mplace.mplace), layout: mplace.layout, align: mplace.align }
}
}
impl<'tcx, Prov: Provenance> PlaceTy<'tcx, Prov> {
#[inline(always)]
pub(super) fn place(&self) -> &Place<Prov> {
&self.place
}
/// A place is either an mplace or some local.
#[inline(always)]
pub fn as_mplace_or_local(
&self,
) -> Either<MPlaceTy<'tcx, Prov>, (usize, mir::Local, Option<Size>)> {
match self.place {
Place::Ptr(mplace) => Left(MPlaceTy { mplace, layout: self.layout, align: self.align }),
Place::Local { frame, local, offset } => Right((frame, local, offset)),
}
}
#[inline(always)]
#[cfg_attr(debug_assertions, track_caller)] // only in debug builds due to perf (see #98980)
pub fn assert_mem_place(&self) -> MPlaceTy<'tcx, Prov> {
self.as_mplace_or_local().left().unwrap_or_else(|| {
bug!(
"PlaceTy of type {} was a local when it was expected to be an MPlace",
self.layout.ty
)
})
}
}
impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for PlaceTy<'tcx, Prov> {
#[inline(always)]
fn layout(&self) -> TyAndLayout<'tcx> {
self.layout
@ -238,7 +286,7 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for PlaceTy<'tcx,
#[inline]
fn meta(&self) -> MemPlaceMeta<Prov> {
match self.as_mplace_or_local() {
Left(mplace) => mplace.meta,
Left(mplace) => mplace.meta(),
Right(_) => {
debug_assert!(self.layout.is_sized(), "unsized locals should live in memory");
MemPlaceMeta::None
@ -286,11 +334,11 @@ impl<'tcx, Prov: Provenance + 'static> Projectable<'tcx, Prov> for PlaceTy<'tcx,
impl<'tcx, Prov: Provenance> OpTy<'tcx, Prov> {
#[inline(always)]
pub fn as_mplace_or_imm(&self) -> Either<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>> {
match **self {
match self.op() {
Operand::Indirect(mplace) => {
Left(MPlaceTy { mplace, layout: self.layout, align: self.align.unwrap() })
Left(MPlaceTy { mplace: *mplace, layout: self.layout, align: self.align.unwrap() })
}
Operand::Immediate(imm) => Right(ImmTy::from_immediate(imm, self.layout)),
Operand::Immediate(imm) => Right(ImmTy::from_immediate(*imm, self.layout)),
}
}
@ -306,30 +354,7 @@ impl<'tcx, Prov: Provenance> OpTy<'tcx, Prov> {
}
}
impl<'tcx, Prov: Provenance + 'static> PlaceTy<'tcx, Prov> {
/// A place is either an mplace or some local.
#[inline(always)]
pub fn as_mplace_or_local(
&self,
) -> Either<MPlaceTy<'tcx, Prov>, (usize, mir::Local, Option<Size>)> {
match **self {
Place::Ptr(mplace) => Left(MPlaceTy { mplace, layout: self.layout, align: self.align }),
Place::Local { frame, local, offset } => Right((frame, local, offset)),
}
}
#[inline(always)]
#[cfg_attr(debug_assertions, track_caller)] // only in debug builds due to perf (see #98980)
pub fn assert_mem_place(&self) -> MPlaceTy<'tcx, Prov> {
self.as_mplace_or_local().left().unwrap_or_else(|| {
bug!(
"PlaceTy of type {} was a local when it was expected to be an MPlace",
self.layout.ty
)
})
}
}
/// The `Weiteable` trait describes interpreter values that can be written to.
pub trait Writeable<'tcx, Prov: Provenance>: Projectable<'tcx, Prov> {
fn as_mplace_or_local(
&self,
@ -341,7 +366,7 @@ pub trait Writeable<'tcx, Prov: Provenance>: Projectable<'tcx, Prov> {
) -> InterpResult<'tcx, MPlaceTy<'tcx, Prov>>;
}
impl<'tcx, Prov: Provenance + 'static> Writeable<'tcx, Prov> for PlaceTy<'tcx, Prov> {
impl<'tcx, Prov: Provenance> Writeable<'tcx, Prov> for PlaceTy<'tcx, Prov> {
#[inline(always)]
fn as_mplace_or_local(
&self,
@ -360,7 +385,7 @@ impl<'tcx, Prov: Provenance + 'static> Writeable<'tcx, Prov> for PlaceTy<'tcx, P
}
}
impl<'tcx, Prov: Provenance + 'static> Writeable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
impl<'tcx, Prov: Provenance> Writeable<'tcx, Prov> for MPlaceTy<'tcx, Prov> {
#[inline(always)]
fn as_mplace_or_local(
&self,
@ -381,7 +406,7 @@ impl<'tcx, Prov: Provenance + 'static> Writeable<'tcx, Prov> for MPlaceTy<'tcx,
// FIXME: Working around https://github.com/rust-lang/rust/issues/54385
impl<'mir, 'tcx: 'mir, Prov, M> InterpCx<'mir, 'tcx, M>
where
Prov: Provenance + 'static,
Prov: Provenance,
M: Machine<'mir, 'tcx, Provenance = Prov>,
{
/// Take a value, which represents a (thin or wide) reference, and make it a place.
@ -415,7 +440,7 @@ where
&self,
mplace: &MPlaceTy<'tcx, M::Provenance>,
) -> InterpResult<'tcx, ImmTy<'tcx, M::Provenance>> {
let imm = mplace.to_ref(self);
let imm = mplace.mplace.to_ref(self);
let layout = self.layout_of(Ty::new_mut_ptr(self.tcx.tcx, mplace.layout.ty))?;
Ok(ImmTy::from_immediate(imm, layout))
}
@ -449,7 +474,7 @@ where
.size_and_align_of_mplace(&mplace)?
.unwrap_or((mplace.layout.size, mplace.layout.align.abi));
// Due to packed places, only `mplace.align` matters.
self.get_ptr_alloc(mplace.ptr, size, mplace.align)
self.get_ptr_alloc(mplace.ptr(), size, mplace.align)
}
#[inline]
@ -462,7 +487,7 @@ where
.size_and_align_of_mplace(&mplace)?
.unwrap_or((mplace.layout.size, mplace.layout.align.abi));
// Due to packed places, only `mplace.align` matters.
self.get_ptr_alloc_mut(mplace.ptr, size, mplace.align)
self.get_ptr_alloc_mut(mplace.ptr(), size, mplace.align)
}
/// Check if this mplace is dereferenceable and sufficiently aligned.
@ -473,7 +498,7 @@ where
// Due to packed places, only `mplace.align` matters.
let align =
if M::enforce_alignment(self).should_check() { mplace.align } else { Align::ONE };
self.check_ptr_access_align(mplace.ptr, size, align, CheckInAllocMsg::DerefTest)?;
self.check_ptr_access_align(mplace.ptr(), size, align, CheckInAllocMsg::DerefTest)?;
Ok(())
}
@ -542,7 +567,7 @@ where
place = self.project(&place, elem)?
}
trace!("{:?}", self.dump_place(place.place));
trace!("{:?}", self.dump_place(&place));
// Sanity-check the type we ended up with.
debug_assert!(
mir_assign_valid_types(
@ -618,7 +643,8 @@ where
// just fall back to the indirect path.
dest.force_mplace(self)?
} else {
match M::access_local_mut(self, frame, local)? {
M::before_access_local_mut(self, frame, local)?;
match self.stack_mut()[frame].locals[local].access_mut()? {
Operand::Immediate(local_val) => {
// Local can be updated in-place.
*local_val = src;
@ -738,7 +764,8 @@ where
// FIXME: share the logic with `write_immediate_no_validate`.
dest.force_mplace(self)?
} else {
match M::access_local_mut(self, frame, local)? {
M::before_access_local_mut(self, frame, local)?;
match self.stack_mut()[frame].locals[local].access_mut()? {
Operand::Immediate(local) => {
*local = Immediate::Uninit;
return Ok(());
@ -832,7 +859,7 @@ where
*src_val,
src.layout(),
dest_mem.align,
*dest_mem,
dest_mem.mplace,
)
};
}
@ -859,7 +886,12 @@ where
// (Or as the `Assign` docs put it, assignments "not producing primitives" must be
// non-overlapping.)
self.mem_copy(
src.ptr, src.align, dest.ptr, dest.align, dest_size, /*nonoverlapping*/ true,
src.ptr(),
src.align,
dest.ptr(),
dest.align,
dest_size,
/*nonoverlapping*/ true,
)
}
@ -874,7 +906,8 @@ where
) -> InterpResult<'tcx, MPlaceTy<'tcx, M::Provenance>> {
let mplace = match place.place {
Place::Local { frame, local, offset } => {
let whole_local = match M::access_local_mut(self, frame, local)? {
M::before_access_local_mut(self, frame, local)?;
let whole_local = match self.stack_mut()[frame].locals[local].access_mut()? {
&mut Operand::Immediate(local_val) => {
// We need to make an allocation.
@ -894,16 +927,16 @@ where
local_val,
local_layout,
local_layout.align.abi,
*mplace,
mplace.mplace,
)?;
}
M::after_local_allocated(self, frame, local, &mplace)?;
// Now we can call `access_mut` again, asserting it goes well, and actually
// overwrite things. This points to the entire allocation, not just the part
// the place refers to, i.e. we do this before we apply `offset`.
*M::access_local_mut(self, frame, local).unwrap() =
Operand::Indirect(*mplace);
*mplace
*self.stack_mut()[frame].locals[local].access_mut().unwrap() =
Operand::Indirect(mplace.mplace);
mplace.mplace
}
&mut Operand::Indirect(mplace) => mplace, // this already was an indirect local
};
@ -1011,12 +1044,12 @@ where
matches!(mplace.layout.ty.kind(), ty::Dynamic(_, _, ty::Dyn)),
"`unpack_dyn_trait` only makes sense on `dyn*` types"
);
let vtable = mplace.meta.unwrap_meta().to_pointer(self)?;
let vtable = mplace.meta().unwrap_meta().to_pointer(self)?;
let (ty, _) = self.get_ptr_vtable(vtable)?;
let layout = self.layout_of(ty)?;
let mplace = MPlaceTy {
mplace: MemPlace { meta: MemPlaceMeta::None, ..**mplace },
mplace: MemPlace { meta: MemPlaceMeta::None, ..mplace.mplace },
layout,
align: layout.align.abi,
};

8
compiler/rustc_const_eval/src/interpret/projection.rs
View File

@ -89,7 +89,7 @@ pub trait Projectable<'tcx, Prov: Provenance>: Sized + std::fmt::Debug {
}
/// A type representing iteration over the elements of an array.
pub struct ArrayIterator<'tcx, 'a, Prov: Provenance + 'static, P: Projectable<'tcx, Prov>> {
pub struct ArrayIterator<'tcx, 'a, Prov: Provenance, P: Projectable<'tcx, Prov>> {
base: &'a P,
range: Range<u64>,
stride: Size,
@ -97,9 +97,7 @@ pub struct ArrayIterator<'tcx, 'a, Prov: Provenance + 'static, P: Projectable<'t
_phantom: PhantomData<Prov>, // otherwise it says `Prov` is never used...
}
impl<'tcx, 'a, Prov: Provenance + 'static, P: Projectable<'tcx, Prov>>
ArrayIterator<'tcx, 'a, Prov, P>
{
impl<'tcx, 'a, Prov: Provenance, P: Projectable<'tcx, Prov>> ArrayIterator<'tcx, 'a, Prov, P> {
/// Should be the same `ecx` on each call, and match the one used to create the iterator.
pub fn next<'mir, M: Machine<'mir, 'tcx, Provenance = Prov>>(
&mut self,
@ -113,7 +111,7 @@ impl<'tcx, 'a, Prov: Provenance + 'static, P: Projectable<'tcx, Prov>>
// FIXME: Working around https://github.com/rust-lang/rust/issues/54385
impl<'mir, 'tcx: 'mir, Prov, M> InterpCx<'mir, 'tcx, M>
where
Prov: Provenance + 'static,
Prov: Provenance,
M: Machine<'mir, 'tcx, Provenance = Prov>,
{
/// Offset a pointer to project to a field of a struct/union. Unlike `place_field`, this is

4
compiler/rustc_const_eval/src/interpret/step.rs
View File

@ -204,7 +204,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// avoid writing each operand individually and instead just make many copies
// of the first element.
let elem_size = first.layout.size;
let first_ptr = first.ptr;
let first_ptr = first.ptr();
let rest_ptr = first_ptr.offset(elem_size, self)?;
// For the alignment of `rest_ptr`, we crucially do *not* use `first.align` as
// that place might be more aligned than its type mandates (a `u8` array could
@ -305,7 +305,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
}
trace!("{:?}", self.dump_place(*dest));
trace!("{:?}", self.dump_place(&dest));
Ok(())
}

6
compiler/rustc_const_eval/src/interpret/terminator.rs
View File

@ -793,7 +793,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
throw_ub_custom!(fluent::const_eval_dyn_star_call_vtable_mismatch);
}
(vptr, dyn_ty, recv.ptr)
(vptr, dyn_ty, recv.ptr())
} else {
// Doesn't have to be a `dyn Trait`, but the unsized tail must be `dyn Trait`.
// (For that reason we also cannot use `unpack_dyn_trait`.)
@ -810,7 +810,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
assert!(receiver_place.layout.is_unsized());
// Get the required information from the vtable.
let vptr = receiver_place.meta.unwrap_meta().to_pointer(self)?;
let vptr = receiver_place.meta().unwrap_meta().to_pointer(self)?;
let (dyn_ty, dyn_trait) = self.get_ptr_vtable(vptr)?;
if dyn_trait != data.principal() {
throw_ub_custom!(fluent::const_eval_dyn_call_vtable_mismatch);
@ -819,7 +819,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// It might be surprising that we use a pointer as the receiver even if this
// is a by-val case; this works because by-val passing of an unsized `dyn
// Trait` to a function is actually desugared to a pointer.
(vptr, dyn_ty, receiver_place.ptr)
(vptr, dyn_ty, receiver_place.ptr())
};
// Now determine the actual method to call. We can do that in two different ways and

12
compiler/rustc_const_eval/src/interpret/validity.rs
View File

@ -360,7 +360,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
// Handle wide pointers.
// Check metadata early, for better diagnostics
if place.layout.is_unsized() {
self.check_wide_ptr_meta(place.meta, place.layout)?;
self.check_wide_ptr_meta(place.meta(), place.layout)?;
}
// Make sure this is dereferenceable and all.
let size_and_align = try_validation!(
@ -379,7 +379,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
// Direct call to `check_ptr_access_align` checks alignment even on CTFE machines.
try_validation!(
self.ecx.check_ptr_access_align(
place.ptr,
place.ptr(),
size,
align,
CheckInAllocMsg::InboundsTest, // will anyway be replaced by validity message
@ -414,7 +414,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
if let Some(ref_tracking) = self.ref_tracking.as_deref_mut() {
// Proceed recursively even for ZST, no reason to skip them!
// `!` is a ZST and we want to validate it.
if let Ok((alloc_id, _offset, _prov)) = self.ecx.ptr_try_get_alloc_id(place.ptr) {
if let Ok((alloc_id, _offset, _prov)) = self.ecx.ptr_try_get_alloc_id(place.ptr()) {
// Let's see what kind of memory this points to.
let alloc_kind = self.ecx.tcx.try_get_global_alloc(alloc_id);
match alloc_kind {
@ -521,7 +521,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
let place =
self.ecx.ref_to_mplace(&self.read_immediate(value, ExpectedKind::RawPtr)?)?;
if place.layout.is_unsized() {
self.check_wide_ptr_meta(place.meta, place.layout)?;
self.check_wide_ptr_meta(place.meta(), place.layout)?;
}
Ok(true)
}
@ -739,7 +739,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueVisitor<'mir, 'tcx, M>
let mplace = op.assert_mem_place(); // strings are unsized and hence never immediate
let len = mplace.len(self.ecx)?;
try_validation!(
self.ecx.read_bytes_ptr_strip_provenance(mplace.ptr, Size::from_bytes(len)),
self.ecx.read_bytes_ptr_strip_provenance(mplace.ptr(), Size::from_bytes(len)),
self.path,
Ub(InvalidUninitBytes(..)) => Uninit { expected: ExpectedKind::Str },
Unsup(ReadPointerAsInt(_)) => PointerAsInt { expected: ExpectedKind::Str }
@ -789,7 +789,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueVisitor<'mir, 'tcx, M>
// to reject those pointers, we just do not have the machinery to
// talk about parts of a pointer.
// We also accept uninit, for consistency with the slow path.
let alloc = self.ecx.get_ptr_alloc(mplace.ptr, size, mplace.align)?.expect("we already excluded size 0");
let alloc = self.ecx.get_ptr_alloc(mplace.ptr(), size, mplace.align)?.expect("we already excluded size 0");
match alloc.get_bytes_strip_provenance() {
// In the happy case, we needn't check anything else.

2
compiler/rustc_const_eval/src/util/check_validity_requirement.rs
View File

@ -54,7 +54,7 @@ fn might_permit_raw_init_strict<'tcx>(
if kind == ValidityRequirement::Zero {
cx.write_bytes_ptr(
allocated.ptr,
allocated.ptr(),
std::iter::repeat(0_u8).take(ty.layout.size().bytes_usize()),
)
.expect("failed to write bytes for zero valid check");

2
compiler/rustc_middle/src/mir/interpret/pointer.rs
View File

@ -103,7 +103,7 @@ impl<T: HasDataLayout> PointerArithmetic for T {}
/// mostly opaque; the `Machine` trait extends it with some more operations that also have access to
/// some global state.
/// The `Debug` rendering is used to display bare provenance, and for the default impl of `fmt`.
pub trait Provenance: Copy + fmt::Debug {
pub trait Provenance: Copy + fmt::Debug + 'static {
/// Says whether the `offset` field of `Pointer`s with this provenance is the actual physical address.
/// - If `false`, the offset *must* be relative. This means the bytes representing a pointer are
/// different from what the Abstract Machine prescribes, so the interpreter must prevent any

24
compiler/rustc_mir_transform/src/const_prop.rs
View File

@ -22,8 +22,7 @@ use rustc_target::spec::abi::Abi as CallAbi;
use crate::MirPass;
use rustc_const_eval::interpret::{
self, compile_time_machine, AllocId, ConstAllocation, ConstValue, FnArg, Frame, ImmTy,
Immediate, InterpCx, InterpResult, LocalValue, MemoryKind, OpTy, PlaceTy, Pointer, Scalar,
StackPopCleanup,
Immediate, InterpCx, InterpResult, MemoryKind, OpTy, PlaceTy, Pointer, Scalar, StackPopCleanup,
};
/// The maximum number of bytes that we'll allocate space for a local or the return value.
@ -225,11 +224,11 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine<'mir, 'tcx>
throw_machine_stop_str!("pointer arithmetic or comparisons aren't supported in ConstProp")
}
fn access_local_mut<'a>(
fn before_access_local_mut<'a>(
ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
frame: usize,
local: Local,
) -> InterpResult<'tcx, &'a mut interpret::Operand<Self::Provenance>> {
) -> InterpResult<'tcx> {
assert_eq!(frame, 0);
match ecx.machine.can_const_prop[local] {
ConstPropMode::NoPropagation => {
@ -242,7 +241,7 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine<'mir, 'tcx>
}
ConstPropMode::FullConstProp => {}
}
ecx.machine.stack[frame].locals[local].access_mut()
Ok(())
}
fn before_access_global(
@ -382,8 +381,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
// mark those as live... We rely on `local_to_place`/`local_to_op` in the interpreter
// stopping us before those unsized immediates can cause issues deeper in the
// interpreter.
ecx.frame_mut().locals[local].value =
LocalValue::Live(interpret::Operand::Immediate(Immediate::Uninit));
ecx.frame_mut().locals[local].make_live_uninit();
}
ConstPropagator { ecx, tcx, param_env, local_decls: &dummy_body.local_decls }
@ -392,7 +390,11 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
fn get_const(&self, place: Place<'tcx>) -> Option<OpTy<'tcx>> {
let op = match self.ecx.eval_place_to_op(place, None) {
Ok(op) => {
if matches!(*op, interpret::Operand::Immediate(Immediate::Uninit)) {
if op
.as_mplace_or_imm()
.right()
.is_some_and(|imm| matches!(*imm, Immediate::Uninit))
{
// Make sure nobody accidentally uses this value.
return None;
}
@ -415,8 +417,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
/// Remove `local` from the pool of `Locals`. Allows writing to them,
/// but not reading from them anymore.
fn remove_const(ecx: &mut InterpCx<'mir, 'tcx, ConstPropMachine<'mir, 'tcx>>, local: Local) {
ecx.frame_mut().locals[local].value =
LocalValue::Live(interpret::Operand::Immediate(interpret::Immediate::Uninit));
ecx.frame_mut().locals[local].make_live_uninit();
ecx.machine.written_only_inside_own_block_locals.remove(&local);
}
@ -743,7 +744,8 @@ impl<'tcx> MutVisitor<'tcx> for ConstPropagator<'_, 'tcx> {
) -> Option<PlaceElem<'tcx>> {
if let PlaceElem::Index(local) = elem
&& let Some(value) = self.get_const(local.into())
&& let interpret::Operand::Immediate(Immediate::Scalar(scalar)) = *value
&& let Some(imm) = value.as_mplace_or_imm().right()
&& let Immediate::Scalar(scalar) = *imm
&& let Ok(offset) = scalar.to_target_usize(&self.tcx)
&& let Some(min_length) = offset.checked_add(1)
{

20
compiler/rustc_mir_transform/src/const_prop_lint.rs
View File

@ -7,7 +7,7 @@ use either::Left;
use rustc_const_eval::interpret::Immediate;
use rustc_const_eval::interpret::{
self, InterpCx, InterpResult, LocalValue, MemoryKind, OpTy, Scalar, StackPopCleanup,
InterpCx, InterpResult, MemoryKind, OpTy, Scalar, StackPopCleanup,
};
use rustc_const_eval::ReportErrorExt;
use rustc_hir::def::DefKind;
@ -212,8 +212,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
// mark those as live... We rely on `local_to_place`/`local_to_op` in the interpreter
// stopping us before those unsized immediates can cause issues deeper in the
// interpreter.
ecx.frame_mut().locals[local].value =
LocalValue::Live(interpret::Operand::Immediate(Immediate::Uninit));
ecx.frame_mut().locals[local].make_live_uninit();
}
ConstPropagator {
@ -236,7 +235,11 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
fn get_const(&self, place: Place<'tcx>) -> Option<OpTy<'tcx>> {
let op = match self.ecx.eval_place_to_op(place, None) {
Ok(op) => {
if matches!(*op, interpret::Operand::Immediate(Immediate::Uninit)) {
if op
.as_mplace_or_imm()
.right()
.is_some_and(|imm| matches!(*imm, Immediate::Uninit))
{
// Make sure nobody accidentally uses this value.
return None;
}
@ -259,8 +262,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
/// Remove `local` from the pool of `Locals`. Allows writing to them,
/// but not reading from them anymore.
fn remove_const(ecx: &mut InterpCx<'mir, 'tcx, ConstPropMachine<'mir, 'tcx>>, local: Local) {
ecx.frame_mut().locals[local].value =
LocalValue::Live(interpret::Operand::Immediate(interpret::Immediate::Uninit));
ecx.frame_mut().locals[local].make_live_uninit();
ecx.machine.written_only_inside_own_block_locals.remove(&local);
}
@ -656,12 +658,12 @@ impl<'tcx> Visitor<'tcx> for ConstPropagator<'_, 'tcx> {
}
StatementKind::StorageLive(local) => {
let frame = self.ecx.frame_mut();
frame.locals[local].value =
LocalValue::Live(interpret::Operand::Immediate(interpret::Immediate::Uninit));
frame.locals[local].make_live_uninit();
}
StatementKind::StorageDead(local) => {
let frame = self.ecx.frame_mut();
frame.locals[local].value = LocalValue::Dead;
// We don't actually track liveness, so the local remains live. But forget its value.
frame.locals[local].make_live_uninit();
}
_ => {}
}

10
src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs
View File

@ -615,7 +615,7 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
) -> InterpResult<'tcx, Option<Provenance>> {
let this = self.eval_context_mut();
// Ensure we bail out if the pointer goes out-of-bounds (see miri#1050).
this.check_ptr_access_align(place.ptr, size, Align::ONE, CheckInAllocMsg::InboundsTest)?;
this.check_ptr_access_align(place.ptr(), size, Align::ONE, CheckInAllocMsg::InboundsTest)?;
// It is crucial that this gets called on all code paths, to ensure we track tag creation.
let log_creation = |this: &MiriInterpCx<'mir, 'tcx>,
@ -682,7 +682,7 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
trace!(
"reborrow of size 0: reference {:?} derived from {:?} (pointee {})",
new_tag,
place.ptr,
place.ptr(),
place.layout.ty,
);
// Don't update any stacks for a zero-sized access; borrow stacks are per-byte and this
@ -692,7 +692,7 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
// attempt to use it for a non-zero-sized access.
// Dangling slices are a common case here; it's valid to get their length but with raw
// pointer tagging for example all calls to get_unchecked on them are invalid.
if let Ok((alloc_id, base_offset, orig_tag)) = this.ptr_try_get_alloc_id(place.ptr) {
if let Ok((alloc_id, base_offset, orig_tag)) = this.ptr_try_get_alloc_id(place.ptr()) {
log_creation(this, Some((alloc_id, base_offset, orig_tag)))?;
// Still give it the new provenance, it got retagged after all.
return Ok(Some(Provenance::Concrete { alloc_id, tag: new_tag }));
@ -700,11 +700,11 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
// This pointer doesn't come with an AllocId. :shrug:
log_creation(this, None)?;
// Provenance unchanged.
return Ok(place.ptr.provenance);
return Ok(place.ptr().provenance);
}
}
let (alloc_id, base_offset, orig_tag) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, orig_tag) = this.ptr_get_alloc_id(place.ptr())?;
log_creation(this, Some((alloc_id, base_offset, orig_tag)))?;
trace!(

10
src/tools/miri/src/borrow_tracker/tree_borrows/mod.rs
View File

@ -172,7 +172,7 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
let this = self.eval_context_mut();
// Ensure we bail out if the pointer goes out-of-bounds (see miri#1050).
this.check_ptr_access_align(
place.ptr,
place.ptr(),
ptr_size,
Align::ONE,
CheckInAllocMsg::InboundsTest,
@ -197,7 +197,7 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
};
trace!("Reborrow of size {:?}", ptr_size);
let (alloc_id, base_offset, parent_prov) = match this.ptr_try_get_alloc_id(place.ptr) {
let (alloc_id, base_offset, parent_prov) = match this.ptr_try_get_alloc_id(place.ptr()) {
Ok(data) => {
// Unlike SB, we *do* a proper retag for size 0 if can identify the allocation.
// After all, the pointer may be lazily initialized outside this initial range.
@ -210,18 +210,18 @@ trait EvalContextPrivExt<'mir: 'ecx, 'tcx: 'mir, 'ecx>: crate::MiriInterpCxExt<'
trace!(
"reborrow of size 0: reference {:?} derived from {:?} (pointee {})",
new_tag,
place.ptr,
place.ptr(),
place.layout.ty,
);
log_creation(this, None)?;
// Keep original provenance.
return Ok(place.ptr.provenance);
return Ok(place.ptr().provenance);
}
};
log_creation(this, Some((alloc_id, base_offset, parent_prov)))?;
let orig_tag = match parent_prov {
ProvenanceExtra::Wildcard => return Ok(place.ptr.provenance), // TODO: handle wildcard pointers
ProvenanceExtra::Wildcard => return Ok(place.ptr().provenance), // TODO: handle wildcard pointers
ProvenanceExtra::Concrete(tag) => tag,
};

10
src/tools/miri/src/concurrency/data_race.rs
View File

@ -1018,7 +1018,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
// be 8-aligned).
let align = Align::from_bytes(place.layout.size.bytes()).unwrap();
this.check_ptr_access_align(
place.ptr,
place.ptr(),
place.layout.size,
align,
CheckInAllocMsg::MemoryAccessTest,
@ -1031,7 +1031,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
// We avoid `get_ptr_alloc` since we do *not* want to run the access hooks -- the actual
// access will happen later.
let (alloc_id, _offset, _prov) =
this.ptr_try_get_alloc_id(place.ptr).expect("there are no zero-sized atomic accesses");
this.ptr_try_get_alloc_id(place.ptr()).expect("there are no zero-sized atomic accesses");
if this.get_alloc_mutability(alloc_id)? == Mutability::Not {
// FIXME: make this prettier, once these messages have separate title/span/help messages.
throw_ub_format!(
@ -1135,7 +1135,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
if let Some(data_race) = &this.machine.data_race {
if data_race.race_detecting() {
let size = place.layout.size;
let (alloc_id, base_offset, _prov) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, _prov) = this.ptr_get_alloc_id(place.ptr())?;
// Load and log the atomic operation.
// Note that atomic loads are possible even from read-only allocations, so `get_alloc_extra_mut` is not an option.
let alloc_meta = this.get_alloc_extra(alloc_id)?.data_race.as_ref().unwrap();
@ -1143,7 +1143,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
"Atomic op({}) with ordering {:?} on {:?} (size={})",
description,
&atomic,
place.ptr,
place.ptr(),
size.bytes()
);
@ -1186,7 +1186,7 @@ trait EvalContextPrivExt<'mir, 'tcx: 'mir>: MiriInterpCxExt<'mir, 'tcx> {
{
log::trace!(
"Updated atomic memory({:?}, size={}) to {:#?}",
place.ptr,
place.ptr(),
size.bytes(),
mem_clocks.atomic_ops
);

12
src/tools/miri/src/concurrency/thread.rs
View File

@ -8,6 +8,7 @@ use std::task::Poll;
use std::time::{Duration, SystemTime};
use log::trace;
use either::Either;
use rustc_data_structures::fx::FxHashMap;
use rustc_hir::def_id::DefId;
@ -259,8 +260,15 @@ impl VisitTags for Frame<'_, '_, Provenance, FrameExtra<'_>> {
return_place.visit_tags(visit);
// Locals.
for local in locals.iter() {
if let LocalValue::Live(value) = &local.value {
value.visit_tags(visit);
match local.as_mplace_or_imm() {
None => {}
Some(Either::Left((ptr, meta))) => {
ptr.visit_tags(visit);
meta.visit_tags(visit);
}
Some(Either::Right(imm)) => {
imm.visit_tags(visit);
}
}
}

10
src/tools/miri/src/concurrency/weak_memory.rs
View File

@ -481,7 +481,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
place: &MPlaceTy<'tcx, Provenance>,
) -> InterpResult<'tcx> {
let this = self.eval_context_ref();
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr())?;
if let crate::AllocExtra {
weak_memory: Some(alloc_buffers),
data_race: Some(alloc_clocks),
@ -512,7 +512,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
init: Scalar<Provenance>,
) -> InterpResult<'tcx> {
let this = self.eval_context_mut();
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr())?;
if let (
crate::AllocExtra { weak_memory: Some(alloc_buffers), .. },
crate::MiriMachine { data_race: Some(global), threads, .. },
@ -539,7 +539,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
) -> InterpResult<'tcx, Scalar<Provenance>> {
let this = self.eval_context_ref();
if let Some(global) = &this.machine.data_race {
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr())?;
if let Some(alloc_buffers) = this.get_alloc_extra(alloc_id)?.weak_memory.as_ref() {
if atomic == AtomicReadOrd::SeqCst {
global.sc_read(&this.machine.threads);
@ -577,7 +577,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
init: Scalar<Provenance>,
) -> InterpResult<'tcx> {
let this = self.eval_context_mut();
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(dest.ptr)?;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(dest.ptr())?;
if let (
crate::AllocExtra { weak_memory: Some(alloc_buffers), .. },
crate::MiriMachine { data_race: Some(global), threads, .. },
@ -627,7 +627,7 @@ pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>:
global.sc_read(&this.machine.threads);
}
let size = place.layout.size;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr)?;
let (alloc_id, base_offset, ..) = this.ptr_get_alloc_id(place.ptr())?;
if let Some(alloc_buffers) = this.get_alloc_extra(alloc_id)?.weak_memory.as_ref() {
let buffer = alloc_buffers
.get_or_create_store_buffer(alloc_range(base_offset, size), init)?;

4
src/tools/miri/src/diagnostics.rs
View File

@ -376,9 +376,9 @@ pub fn report_error<'tcx, 'mir>(
for (i, frame) in ecx.active_thread_stack().iter().enumerate() {
trace!("-------------------");
trace!("Frame {}", i);
trace!(" return: {:?}", *frame.return_place);
trace!(" return: {:?}", frame.return_place);
for (i, local) in frame.locals.iter().enumerate() {
trace!(" local {}: {:?}", i, local.value);
trace!(" local {}: {:?}", i, local);
}
}

15
src/tools/miri/src/eval.rs
View File

@ -242,10 +242,7 @@ impl MainThreadState {
},
Done => {
// Figure out exit code.
let ret_place = MPlaceTy::from_aligned_ptr(
this.machine.main_fn_ret_place.unwrap().ptr,
this.machine.layouts.isize,
);
let ret_place = this.machine.main_fn_ret_place.clone().unwrap();
let exit_code = this.read_target_isize(&ret_place)?;
// Need to call this ourselves since we are not going to return to the scheduler
// loop, and we want the main thread TLS to not show up as memory leaks.
@ -308,7 +305,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
let arg_type = Ty::new_array(tcx, tcx.types.u8, size);
let arg_place =
ecx.allocate(ecx.layout_of(arg_type)?, MiriMemoryKind::Machine.into())?;
ecx.write_os_str_to_c_str(OsStr::new(arg), arg_place.ptr, size)?;
ecx.write_os_str_to_c_str(OsStr::new(arg), arg_place.ptr(), size)?;
ecx.mark_immutable(&arg_place);
argvs.push(arg_place.to_ref(&ecx));
}
@ -332,7 +329,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into())?;
ecx.write_scalar(argc, &argc_place)?;
ecx.mark_immutable(&argc_place);
ecx.machine.argc = Some(*argc_place);
ecx.machine.argc = Some(argc_place.ptr());
let argv_place = ecx.allocate(
ecx.layout_of(Ty::new_imm_ptr(tcx, tcx.types.unit))?,
@ -340,7 +337,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
)?;
ecx.write_immediate(argv, &argv_place)?;
ecx.mark_immutable(&argv_place);
ecx.machine.argv = Some(*argv_place);
ecx.machine.argv = Some(argv_place.ptr());
}
// Store command line as UTF-16 for Windows `GetCommandLineW`.
{
@ -351,7 +348,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
Ty::new_array(tcx, tcx.types.u16, u64::try_from(cmd_utf16.len()).unwrap());
let cmd_place =
ecx.allocate(ecx.layout_of(cmd_type)?, MiriMemoryKind::Machine.into())?;
ecx.machine.cmd_line = Some(*cmd_place);
ecx.machine.cmd_line = Some(cmd_place.ptr());
// Store the UTF-16 string. We just allocated so we know the bounds are fine.
for (idx, &c) in cmd_utf16.iter().enumerate() {
let place = ecx.project_field(&cmd_place, idx)?;
@ -364,7 +361,7 @@ pub fn create_ecx<'mir, 'tcx: 'mir>(
// Return place (in static memory so that it does not count as leak).
let ret_place = ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into())?;
ecx.machine.main_fn_ret_place = Some(*ret_place);
ecx.machine.main_fn_ret_place = Some(ret_place.clone());
// Call start function.
match entry_type {

12
src/tools/miri/src/helpers.rs
View File

@ -381,7 +381,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
// 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
// have had `action` called on them.
let start_addr = place.ptr.addr();
let start_addr = place.ptr().addr();
let mut cur_addr = start_addr;
// Called when we detected an `UnsafeCell` at the given offset and size.
// Calls `action` and advances `cur_ptr`.
@ -413,7 +413,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let mut visitor = UnsafeCellVisitor {
ecx: this,
unsafe_cell_action: |place| {
trace!("unsafe_cell_action on {:?}", place.ptr);
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)?
@ -422,7 +422,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
.unwrap_or_else(|| place.layout.size);
// Now handle this `UnsafeCell`, unless it is empty.
if unsafe_cell_size != Size::ZERO {
unsafe_cell_action(&place.ptr, unsafe_cell_size)
unsafe_cell_action(&place.ptr(), unsafe_cell_size)
} else {
Ok(())
}
@ -432,7 +432,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
// The part between the end_ptr and the end of the place is also frozen.
// So pretend there is a 0-sized `UnsafeCell` at the end.
unsafe_cell_action(&place.ptr.offset(size, this)?, Size::ZERO)?;
unsafe_cell_action(&place.ptr().offset(size, this)?, Size::ZERO)?;
// Done!
return Ok(());
@ -994,10 +994,10 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
/// Mark a machine allocation that was just created as immutable.
fn mark_immutable(&mut self, mplace: &MemPlace<Provenance>) {
fn mark_immutable(&mut self, mplace: &MPlaceTy<'tcx, Provenance>) {
let this = self.eval_context_mut();
// This got just allocated, so there definitely is a pointer here.
let provenance = mplace.ptr.into_pointer_or_addr().unwrap().provenance;
let provenance = mplace.ptr().into_pointer_or_addr().unwrap().provenance;
this.alloc_mark_immutable(provenance.get_alloc_id().unwrap()).unwrap();
}

16
src/tools/miri/src/machine.rs
View File

@ -396,14 +396,14 @@ pub struct MiriMachine<'mir, 'tcx> {
pub(crate) env_vars: EnvVars<'tcx>,
/// Return place of the main function.
pub(crate) main_fn_ret_place: Option<MemPlace<Provenance>>,
pub(crate) main_fn_ret_place: Option<MPlaceTy<'tcx, Provenance>>,
/// Program arguments (`Option` because we can only initialize them after creating the ecx).
/// These are *pointers* to argc/argv because macOS.
/// We also need the full command line as one string because of Windows.
pub(crate) argc: Option<MemPlace<Provenance>>,
pub(crate) argv: Option<MemPlace<Provenance>>,
pub(crate) cmd_line: Option<MemPlace<Provenance>>,
pub(crate) argc: Option<Pointer<Option<Provenance>>>,
pub(crate) argv: Option<Pointer<Option<Provenance>>>,
pub(crate) cmd_line: Option<Pointer<Option<Provenance>>>,
/// TLS state.
pub(crate) tls: TlsData<'tcx>,
@ -670,7 +670,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
) -> InterpResult<'tcx> {
let place = this.allocate(val.layout, MiriMemoryKind::ExternStatic.into())?;
this.write_immediate(*val, &place)?;
Self::add_extern_static(this, name, place.ptr);
Self::add_extern_static(this, name, place.ptr());
Ok(())
}
@ -686,7 +686,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
Self::add_extern_static(
this,
"environ",
this.machine.env_vars.environ.as_ref().unwrap().ptr,
this.machine.env_vars.environ.as_ref().unwrap().ptr(),
);
// A couple zero-initialized pointer-sized extern statics.
// Most of them are for weak symbols, which we all set to null (indicating that the
@ -703,7 +703,7 @@ impl<'mir, 'tcx> MiriMachine<'mir, 'tcx> {
Self::add_extern_static(
this,
"environ",
this.machine.env_vars.environ.as_ref().unwrap().ptr,
this.machine.env_vars.environ.as_ref().unwrap().ptr(),
);
}
"android" => {
@ -1415,7 +1415,7 @@ impl<'mir, 'tcx> Machine<'mir, 'tcx> for MiriMachine<'mir, 'tcx> {
local: mir::Local,
mplace: &MPlaceTy<'tcx, Provenance>,
) -> InterpResult<'tcx> {
let Some(Provenance::Concrete { alloc_id, .. }) = mplace.ptr.provenance else {
let Some(Provenance::Concrete { alloc_id, .. }) = mplace.ptr().provenance else {
panic!("after_local_allocated should only be called on fresh allocations");
};
let local_decl = &ecx.active_thread_stack()[frame].body.local_decls[local];

2
src/tools/miri/src/shims/backtrace.rs
View File

@ -89,7 +89,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
this.write_immediate(
Immediate::new_slice(Scalar::from_maybe_pointer(alloc.ptr, this), len, this),
Immediate::new_slice(Scalar::from_maybe_pointer(alloc.ptr(), this), len, this),
dest,
)?;
}

2
src/tools/miri/src/shims/env.rs
View File

@ -459,7 +459,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let place = this.project_field(&vars_place, idx)?;
this.write_pointer(var, &place)?;
}
this.write_pointer(vars_place.ptr, &this.machine.env_vars.environ.clone().unwrap())?;
this.write_pointer(vars_place.ptr(), &this.machine.env_vars.environ.clone().unwrap())?;
Ok(())
}

2
src/tools/miri/src/shims/foreign_items.rs
View File

@ -324,7 +324,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
// Second: functions that return immediately.
match this.emulate_foreign_item_by_name(link_name, abi, args, dest)? {
EmulateByNameResult::NeedsJumping => {
trace!("{:?}", this.dump_place(**dest));
trace!("{:?}", this.dump_place(dest));
this.go_to_block(ret);
}
EmulateByNameResult::AlreadyJumped => (),

2
src/tools/miri/src/shims/intrinsics/mod.rs
View File

@ -62,7 +62,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
// The rest jumps to `ret` immediately.
this.emulate_intrinsic_by_name(intrinsic_name, args, dest)?;
trace!("{:?}", this.dump_place(**dest));
trace!("{:?}", this.dump_place(dest));
this.go_to_block(ret);
Ok(())
}

8
src/tools/miri/src/shims/os_str.rs
View File

@ -143,9 +143,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let arg_type = Ty::new_array(this.tcx.tcx, this.tcx.types.u8, size);
let arg_place = this.allocate(this.layout_of(arg_type).unwrap(), memkind)?;
let (written, _) = self.write_os_str_to_c_str(os_str, arg_place.ptr, size).unwrap();
let (written, _) = self.write_os_str_to_c_str(os_str, arg_place.ptr(), size).unwrap();
assert!(written);
Ok(arg_place.ptr)
Ok(arg_place.ptr())
}
/// Allocate enough memory to store the given `OsStr` as a null-terminated sequence of `u16`.
@ -160,9 +160,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let arg_type = Ty::new_array(this.tcx.tcx, this.tcx.types.u16, size);
let arg_place = this.allocate(this.layout_of(arg_type).unwrap(), memkind)?;
let (written, _) =
self.write_os_str_to_wide_str(os_str, arg_place.ptr, size, /*truncate*/ false).unwrap();
self.write_os_str_to_wide_str(os_str, arg_place.ptr(), size, /*truncate*/ false).unwrap();
assert!(written);
Ok(arg_place.ptr)
Ok(arg_place.ptr())
}
/// Read a null-terminated sequence of bytes, and perform path separator conversion if needed.

2
src/tools/miri/src/shims/unix/android/dlsym.rs
View File

@ -47,7 +47,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
}
log::trace!("{:?}", this.dump_place(**dest));
log::trace!("{:?}", this.dump_place(dest));
this.go_to_block(ret);
Ok(())
}

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

@ -597,7 +597,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
this.write_pointer(buf, &pw_dir)?;
if written {
this.write_pointer(pwd.ptr, &result)?;
this.write_pointer(pwd.ptr(), &result)?;
this.write_null(dest)?;
} else {
this.write_null(&result)?;

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

@ -1439,7 +1439,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
let file_name = dir_entry.file_name(); // not a Path as there are no separators!
let (name_fits, file_name_buf_len) = this.write_os_str_to_c_str(
&file_name,
name_place.ptr,
name_place.ptr(),
name_place.layout.size.bytes(),
)?;
let file_name_len = file_name_buf_len.checked_sub(1).unwrap();

4
src/tools/miri/src/shims/unix/linux/sync.rs
View File

@ -35,7 +35,7 @@ pub fn futex<'tcx>(
let thread = this.get_active_thread();
// This is a vararg function so we have to bring our own type for this pointer.
let addr = MPlaceTy::from_aligned_ptr(addr, this.machine.layouts.i32);
let addr_usize = addr.ptr.addr().bytes();
let addr_usize = addr.ptr().addr().bytes();
let futex_private = this.eval_libc_i32("FUTEX_PRIVATE_FLAG");
let futex_wait = this.eval_libc_i32("FUTEX_WAIT");
@ -90,7 +90,7 @@ pub fn futex<'tcx>(
&this.read_immediate(&args[3])?,
this.libc_ty_layout("timespec"),
)?;
let timeout_time = if this.ptr_is_null(timeout.ptr)? {
let timeout_time = if this.ptr_is_null(timeout.ptr())? {
None
} else {
let realtime = op & futex_realtime == futex_realtime;

2
src/tools/miri/src/shims/unix/macos/dlsym.rs
View File

@ -45,7 +45,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
}
trace!("{:?}", this.dump_place(**dest));
trace!("{:?}", this.dump_place(dest));
this.go_to_block(ret);
Ok(())
}

6
src/tools/miri/src/shims/unix/macos/foreign_items.rs
View File

@ -91,7 +91,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
.environ
.as_ref()
.expect("machine must be initialized")
.ptr,
.ptr(),
dest,
)?;
}
@ -113,14 +113,14 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
"_NSGetArgc" => {
let [] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
this.write_pointer(
this.machine.argc.expect("machine must be initialized").ptr,
this.machine.argc.expect("machine must be initialized"),
dest,
)?;
}
"_NSGetArgv" => {
let [] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
this.write_pointer(
this.machine.argv.expect("machine must be initialized").ptr,
this.machine.argv.expect("machine must be initialized"),
dest,
)?;
}

2
src/tools/miri/src/shims/windows/dlsym.rs
View File

@ -75,7 +75,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
}
}
trace!("{:?}", this.dump_place(**dest));
trace!("{:?}", this.dump_place(dest));
this.go_to_block(ret);
Ok(())
}

4
src/tools/miri/src/shims/windows/foreign_items.rs
View File

@ -190,7 +190,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
this.deref_pointer_as(system_info, this.windows_ty_layout("SYSTEM_INFO"))?;
// Initialize with `0`.
this.write_bytes_ptr(
system_info.ptr,
system_info.ptr(),
iter::repeat(0u8).take(system_info.layout.size.bytes_usize()),
)?;
// Set selected fields.
@ -235,7 +235,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
"GetCommandLineW" => {
let [] = this.check_shim(abi, Abi::System { unwind: false }, link_name, args)?;
this.write_pointer(
this.machine.cmd_line.expect("machine must be initialized").ptr,
this.machine.cmd_line.expect("machine must be initialized"),
dest,
)?;
}

39
src/tools/miri/src/tag_gc.rs
View File

@ -1,3 +1,5 @@
use either::Either;
use rustc_data_structures::fx::FxHashSet;
use crate::*;
@ -81,46 +83,33 @@ impl VisitTags for MemPlaceMeta<Provenance> {
}
}
impl VisitTags for MemPlace<Provenance> {
impl VisitTags for ImmTy<'_, Provenance> {
fn visit_tags(&self, visit: &mut dyn FnMut(BorTag)) {
let MemPlace { ptr, meta } = self;
ptr.visit_tags(visit);
meta.visit_tags(visit);
(**self).visit_tags(visit)
}
}
impl VisitTags for MPlaceTy<'_, Provenance> {
fn visit_tags(&self, visit: &mut dyn FnMut(BorTag)) {
(**self).visit_tags(visit)
}
}
impl VisitTags for Place<Provenance> {
fn visit_tags(&self, visit: &mut dyn FnMut(BorTag)) {
match self {
Place::Ptr(p) => p.visit_tags(visit),
Place::Local { .. } => {
// Will be visited as part of the stack frame.
}
}
self.ptr().visit_tags(visit);
self.meta().visit_tags(visit);
}
}
impl VisitTags for PlaceTy<'_, Provenance> {
fn visit_tags(&self, visit: &mut dyn FnMut(BorTag)) {
(**self).visit_tags(visit)
match self.as_mplace_or_local() {
Either::Left(mplace) => mplace.visit_tags(visit),
Either::Right(_) => (),
}
}
}
impl VisitTags for Operand<Provenance> {
impl VisitTags for OpTy<'_, Provenance> {
fn visit_tags(&self, visit: &mut dyn FnMut(BorTag)) {
match self {
Operand::Immediate(imm) => {
imm.visit_tags(visit);
}
Operand::Indirect(p) => {
p.visit_tags(visit);
}
match self.as_mplace_or_imm() {
Either::Left(mplace) => mplace.visit_tags(visit),
Either::Right(imm) => imm.visit_tags(visit),
}
}
}