CFI: Fix drop and drop_in_place

[rcvalle]

Fix drop and drop_in_place by transforming self of drop and drop_in_place methods into a Drop trait objects.

This was split off from #116404.

cc @compiler-errors @workingjubilee

[rustbot]

r? @oli-obk

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[rustbot]

Some changes occurred in tests/ui/sanitizer

cc @rust-lang/project-exploit-mitigations, @rcvalle

Some changes occurred in compiler/rustc_symbol_mangling/src/typeid

cc @rust-lang/project-exploit-mitigations, @rcvalle

[rcvalle]

r? @compiler-errors

[compiler-errors]

Also you need to add a definition of the Drop trait to tests/codegen/sanitizer/kcfi/emit-type-metadata-trait-objects.rs, which fails currently:

#[lang="drop"]
trait Drop { fn drop(&mut self); }

[compiler-errors]

@rustbot author

[rcvalle]

Also you need to add a definition of the Drop trait to tests/codegen/sanitizer/kcfi/emit-type-metadata-trait-objects.rs, which fails currently:

#[lang="drop"]
trait Drop { fn drop(&mut self); }

Done.

[rustbot]

Some changes occurred in tests/codegen/sanitizer

cc @rust-lang/project-exploit-mitigations, @rcvalle

[compiler-errors]

@bors r+

[bors]

📌 Commit 0b86081 has been approved by compiler-errors

It is now in the queue for this repository.