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Auto merge of #117956 - saethlin:provenance-gc-access, r=RalfJung

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Let Miri see the AllocId for all TyCtxt allocations

Per https://github.com/rust-lang/miri/pull/3103#discussion_r1391589896

r? `@RalfJung`
This commit is contained in:
bors 2023-11-16 15:15:54 +00:00
commit 0ea7ddcc35
1 changed files with 7 additions and 0 deletions
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7
compiler/rustc_middle/src/mir/interpret/mod.rs
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@ -525,6 +525,13 @@ pub fn reserve_alloc_id(self) -> AllocId {
self.alloc_map.lock().reserve() self.alloc_map.lock().reserve()
} }
/// Miri's provenance GC needs to see all live allocations. The interpreter manages most
/// allocations but some are managed by [`TyCtxt`] and without this method the interpreter
/// doesn't know their [`AllocId`]s are in use.
pub fn iter_allocs<F: FnMut(AllocId)>(self, func: F) {
self.alloc_map.lock().alloc_map.keys().copied().for_each(func)
}
/// Reserves a new ID *if* this allocation has not been dedup-reserved before. /// Reserves a new ID *if* this allocation has not been dedup-reserved before.
/// Should only be used for "symbolic" allocations (function pointers, vtables, statics), we /// Should only be used for "symbolic" allocations (function pointers, vtables, statics), we
/// don't want to dedup IDs for "real" memory! /// don't want to dedup IDs for "real" memory!