bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

basic dyn* support for Miri

Browse source
This commit is contained in:
Ralf Jung 2023-02-06 16:00:54 +01:00
parent dc89a803d6
commit b2f58146b9
16 changed files with 325 additions and 84 deletions
Download patch file Download diff file Expand all files Collapse all files

11
compiler/rustc_const_eval/src/interpret/cast.rs
View file

@ -312,6 +312,8 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
}
/// `src` is a *pointer to* a `source_ty`, and in `dest` we should store a pointer to th same
/// data at type `cast_ty`.
fn unsize_into_ptr(
&mut self,
src: &OpTy<'tcx, M::Provenance>,
@ -335,7 +337,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
);
self.write_immediate(val, dest)
}
(ty::Dynamic(data_a, ..), ty::Dynamic(data_b, ..)) => {
(ty::Dynamic(data_a, _, ty::Dyn), ty::Dynamic(data_b, _, ty::Dyn)) => {
let val = self.read_immediate(src)?;
if data_a.principal() == data_b.principal() {
// A NOP cast that doesn't actually change anything, should be allowed even with mismatching vtables.
@ -359,7 +361,12 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
_ => {
span_bug!(self.cur_span(), "invalid unsizing {:?} -> {:?}", src.layout.ty, cast_ty)
span_bug!(
self.cur_span(),
"invalid pointer unsizing {:?} -> {:?}",
src.layout.ty,
cast_ty
)
}
}
}