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Place size limits on query keys and values #108690

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Merged
bors merged 1 commit into from
Mar 11, 2023
Merged

Place size limits on query keys and values #108690

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30 changes: 30 additions & 0 deletions compiler/rustc_middle/src/ty/query.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -250,6 +250,36 @@ macro_rules! define_callbacks {
)*
}

$(
// Ensure that keys grow no larger than 64 bytes
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
const _: () = {
if mem::size_of::<query_keys::$name<'static>>() > 64 {
panic!("{}", concat!(
"the query `",
stringify!($name),
"` has a key type `",
stringify!($($K)*),
"` that is too large"
));
}
};

// Ensure that values grow no larger than 64 bytes
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
const _: () = {
if mem::size_of::<query_values::$name<'static>>() > 64 {
panic!("{}", concat!(
"the query `",
stringify!($name),
"` has a value type `",
stringify!($V),
"` that is too large"
));
}
};
)*

pub struct QueryArenas<'tcx> {
$($(#[$attr])* pub $name: query_if_arena!([$($modifiers)*]
(WorkerLocal<TypedArena<<$V as Deref>::Target>>)
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