bors 591ecb88df Auto merge of #128742 - RalfJung:miri-vtable-uniqueness, r=saethlin ... miri: make vtable addresses not globally unique Miri currently gives vtables a unique global address. That's not actually matching reality though. So this PR enables Miri to generate different addresses for the same type-trait pair. To avoid generating an unbounded number of `AllocId` (and consuming unbounded amounts of memory), we use the "salt" technique that we also already use for giving constants non-unique addresses: the cache is keyed on a "salt" value n top of the actually relevant key, and Miri picks a random salt (currently in the range `0..16`) each time it needs to choose an `AllocId` for one of these globals -- that means we'll get up to 16 different addresses for each vtable. The salt scheme is integrated into the global allocation deduplication logic in `tcx`, and also used for functions and string literals. (So this also fixes the problem that casting the same function to a fn ptr over and over will consume unbounded memory.) r? `@saethlin` Fixes https://github.com/rust-lang/miri/issues/3737		2024-08-13 04:32:34 +00:00
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src	Auto merge of #128742 - RalfJung:miri-vtable-uniqueness, r=saethlin	2024-08-13 04:32:34 +00:00
Cargo.toml	const_to_pat: cleanup leftovers from when we had to deal with non-structural constants	2024-07-18 11:58:16 +02:00
messages.ftl	Improve "covered_by_many" error	2024-07-24 08:46:52 +02:00