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Miri: santiy check that null pointer can never have an AllocId

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This commit is contained in:
Ralf Jung
2021-07-25 11:31:57 +02:00
parent 1c66d11a34
commit f4861f3251
1 changed files with 5 additions and 1 deletions
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6
compiler/rustc_mir/src/interpret/memory.rs
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@@ -1142,7 +1142,11 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
Err(ptr) => ptr.into(), Err(ptr) => ptr.into(),
Ok(bits) => { Ok(bits) => {
let addr = u64::try_from(bits).unwrap(); let addr = u64::try_from(bits).unwrap();
M::ptr_from_addr(&self, addr) let ptr = M::ptr_from_addr(&self, addr);
if addr == 0 {
assert!(ptr.provenance.is_none(), "null pointer can never have an AllocId");
}
ptr
} }
} }
} }