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interpret errors: add map_err_kind, rename InterpError -> InterpErrorKind

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This commit is contained in:
Ralf Jung
2024-10-19 08:49:13 +02:00
parent b27f33a4d9
commit eea74be5c1
17 changed files with 108 additions and 95 deletions
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32
compiler/rustc_const_eval/src/interpret/validity.rs
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@@ -17,8 +17,8 @@ use rustc_hir as hir;
use rustc_middle::bug;
use rustc_middle::mir::interpret::ValidationErrorKind::{self, *};
use rustc_middle::mir::interpret::{
ExpectedKind, InterpError, InterpErrorInfo, InvalidMetaKind, Misalignment, PointerKind,
Provenance, UnsupportedOpInfo, ValidationErrorInfo, alloc_range, interp_ok,
ExpectedKind, InterpErrorKind, InvalidMetaKind, Misalignment, PointerKind, Provenance,
UnsupportedOpInfo, ValidationErrorInfo, alloc_range, interp_ok,
};
use rustc_middle::ty::layout::{LayoutCx, LayoutOf, TyAndLayout};
use rustc_middle::ty::{self, Ty};
@@ -37,8 +37,8 @@ use super::{
// for the validation errors
#[rustfmt::skip]
use super::InterpError::UndefinedBehavior as Ub;
use super::InterpError::Unsupported as Unsup;
use super::InterpErrorKind::UndefinedBehavior as Ub;
use super::InterpErrorKind::Unsupported as Unsup;
use super::UndefinedBehaviorInfo::*;
use super::UnsupportedOpInfo::*;
@@ -97,20 +97,19 @@ macro_rules! try_validation {
($e:expr, $where:expr,
$( $( $p:pat_param )|+ => $kind: expr ),+ $(,)?
) => {{
$e.map_err(|e| {
$e.map_err_kind(|e| {
// We catch the error and turn it into a validation failure. We are okay with
// allocation here as this can only slow down builds that fail anyway.
let (kind, backtrace) = e.into_parts();
match kind {
match e {
$(
$($p)|+ => {
err_validation_failure!(
$where,
$kind
).into()
)
}
),+,
_ => InterpErrorInfo::from_parts(kind, backtrace),
e => e,
}
})?
}};
@@ -1230,11 +1229,10 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValueVisitor<'tcx, M> for ValidityVisitor<'rt,
// No need for an alignment check here, this is not an actual memory access.
let alloc = self.ecx.get_ptr_alloc(mplace.ptr(), size)?.expect("we already excluded size 0");
alloc.get_bytes_strip_provenance().map_err(|err| {
alloc.get_bytes_strip_provenance().map_err_kind(|kind| {
// Some error happened, try to provide a more detailed description.
// For some errors we might be able to provide extra information.
// (This custom logic does not fit the `try_validation!` macro.)
let (kind, backtrace) = err.into_parts();
match kind {
Ub(InvalidUninitBytes(Some((_alloc_id, access)))) | Unsup(ReadPointerAsInt(Some((_alloc_id, access)))) => {
// Some byte was uninitialized, determine which
@@ -1247,14 +1245,14 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValueVisitor<'tcx, M> for ValidityVisitor<'rt,
self.path.push(PathElem::ArrayElem(i));
if matches!(kind, Ub(InvalidUninitBytes(_))) {
err_validation_failure!(self.path, Uninit { expected }).into()
err_validation_failure!(self.path, Uninit { expected })
} else {
err_validation_failure!(self.path, PointerAsInt { expected }).into()
err_validation_failure!(self.path, PointerAsInt { expected })
}
}
// Propagate upwards (that will also check for unexpected errors).
_ => return InterpErrorInfo::from_parts(kind, backtrace),
err => err,
}
})?;
@@ -1368,12 +1366,12 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
v.reset_padding(val)?;
interp_ok(())
})
.map_err(|err| {
.map_err_info(|err| {
if !matches!(
err.kind(),
err_ub!(ValidationError { .. })
| InterpError::InvalidProgram(_)
| InterpError::Unsupported(UnsupportedOpInfo::ExternTypeField)
| InterpErrorKind::InvalidProgram(_)
| InterpErrorKind::Unsupported(UnsupportedOpInfo::ExternTypeField)
) {
bug!(
"Unexpected error during validation: {}",