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CFI: Restore typeid_for_instance default behavior #123487

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@rcvalle rcvalle commented Apr 5, 2024

Restore typeid_for_instance default behavior of performing self type erasure, since it's the most common case and what it does most of the time. Using concrete self (or not performing self type erasure) is for assigning a secondary type id, and secondary type ids are only assigned when they're unique and to methods, and also are only tested for when methods are used as function pointers.

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r? @petrochenkov

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@rustbot rustbot added PG-exploit-mitigations Project group: Exploit mitigations S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Apr 5, 2024
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Some changes occurred in compiler/rustc_symbol_mangling/src/typeid

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

Some changes occurred in tests/codegen/sanitizer

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

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rcvalle commented Apr 5, 2024

r? @compiler-errors

Restore typeid_for_instance default behavior of performing self type
erasure, since it's the most common case and what it does most of the
time. Using concrete self (or not performing self type erasure) is for
assigning a secondary type id, and secondary type ids are only assigned
when they're unique and to methods, and also are only tested for when
methods are used as function pointers.
@rcvalle rcvalle force-pushed the rust-cfi-restore-typeid-for-instance branch from 51ef1e9 to 2498a9d Compare April 5, 2024 04:19
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@bors r+ rollup

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bors commented Apr 5, 2024

📌 Commit 2498a9d has been approved by compiler-errors

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Apr 5, 2024
workingjubilee added a commit to workingjubilee/rustc that referenced this pull request Apr 5, 2024
…r-instance, r=compiler-errors

CFI: Restore typeid_for_instance default behavior

Restore typeid_for_instance default behavior of performing self type erasure, since it's the most common case and what it does most of the time. Using concrete self (or not performing self type erasure) is for assigning a secondary type id, and secondary type ids are only assigned when they're unique and to methods, and also are only tested for when methods are used as function pointers.
bors added a commit to rust-lang-ci/rust that referenced this pull request Apr 5, 2024
…llaumeGomez

Rollup of 8 pull requests

Successful merges:

 - rust-lang#121419 (Add aarch64-apple-visionos and aarch64-apple-visionos-sim tier 3 targets)
 - rust-lang#123159 (Fix target-cpu fpu features on Arm R/M-profile)
 - rust-lang#123487 (CFI: Restore typeid_for_instance default behavior)
 - rust-lang#123500 (Revert removing miri jobserver workaround)
 - rust-lang#123505 (Revert "Use OS thread name by default")
 - rust-lang#123509 (Add jieyouxu to compiler review rotation and as a reviewer for `tests/run-make`, `src/tools/run-make-support` and `src/tools/compiletest`)
 - rust-lang#123514 (Fix typo in `compiler/rustc_middle/src/traits/solve/inspect.rs`)
 - rust-lang#123515 (Use `include` command to reduce code duplication)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 5ceac29 into rust-lang:master Apr 6, 2024
11 checks passed
@rustbot rustbot added this to the 1.79.0 milestone Apr 6, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Apr 6, 2024
Rollup merge of rust-lang#123487 - rcvalle:rust-cfi-restore-typeid-for-instance, r=compiler-errors

CFI: Restore typeid_for_instance default behavior

Restore typeid_for_instance default behavior of performing self type erasure, since it's the most common case and what it does most of the time. Using concrete self (or not performing self type erasure) is for assigning a secondary type id, and secondary type ids are only assigned when they're unique and to methods, and also are only tested for when methods are used as function pointers.
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5 participants