rust-lang unsafe-code-guidelines issues

rust-lang / unsafe-code-guidelines

Forum for discussion about what unsafe code can and can't do

https://rust-lang.github.io/unsafe-code-guidelines

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Minimum guarantees for union construction and typed copies?

#533 joshlf opened 1 day ago
0
What about: aliasing requirements for nested references?

#532 oxalica opened 5 days ago
1
Is there a way to soundly implement racy read/writes as used in Chase/Lev deques?

#531 anp closed 1 week ago
6
Do the current nightly `std::ptr` docs violate provenance monotonicity?

#530 joshlf opened 3 weeks ago
1
Do ZST `Box`es violate provenance monotonicity?

#529 joshlf closed 3 weeks ago
4
Can FFI code use `memory_order_consume`

#528 chorman0773 opened 1 month ago
9
Can uninitialized memory come from the outside world?

#527 ChayimFriedman2 opened 1 month ago
4
What are the requirements for unloading a library (`dlclose`)?

#526 VorpalBlade opened 1 month ago
8
What are the soundness requirements for `dlopen`?

#525 RalfJung opened 1 month ago
40
Is it UB to have a mutable reference that could be misused, or simply to misuse it?

#524 clarfonthey closed 1 month ago
4
How do aliasing model protectors interact with tail calls?

#523 RalfJung opened 1 month ago
5
What do we say about the equality of pointers in constants, vtables, and function pointers?

#522 RalfJung opened 2 months ago
19
repr(C) does not always match the current target's C toolchain (when that target is windows-msvc)

#521 RalfJung opened 2 months ago
7
What are the operational semantics of unsized locals?

#520 RalfJung opened 2 months ago
4
If a Pin is changed to point to a different location, what happens?

#519 theemathas opened 2 months ago
3
Should we / can we make MaybeUninit<T> always preserve all bytes of T?

#518 RalfJung opened 2 months ago
19
Packing pointers into double-word width atomics

#517 eggyal opened 2 months ago
44
What are the validity requirements of wide pointers/references with `dyn Trait` tail?

#516 RalfJung opened 2 months ago
1
Should we have a way to give functions a stable address?

#515 RalfJung opened 3 months ago
5
Is it UB to change a non-`mut` `extern static`?

#514 ChayimFriedman2 closed 2 months ago
3
Validity of a `char` value that is a surrogate

#513 celinval closed 3 months ago
16
Should we have a language concept of erroneous behavior?

#512 CAD97 opened 4 months ago
7
Should closures implicitly be wrapped in `MaybeDangling`?

#511 RalfJung opened 4 months ago
4
Decide on validity for metadata of wide pointer/reference with slice tail

#510 RalfJung closed 4 months ago
23
Are &mut references that point to read only memory but are never written to undefined behavior

#509 gmorenz closed 5 months ago
3
Is `usize::MAX` an allocatable address?

#508 CAD97 closed 5 months ago
6
LLVM integer/pointer casts are unreliable and observably disagree with the intended Rust semantics

#507 joboet opened 5 months ago
2
Who is responsible for preventing reentrancy issues through the allocator?

#506 RalfJung opened 5 months ago
3
Better documentation needed: reentrancy through the panic hook

#505 RalfJung opened 5 months ago
3
When are `static` symbols guaranteed to show up in the final binary?

#504 RalfJung opened 5 months ago
11
What are the guarantees over ZST pointers

#503 celinval closed 5 months ago
11
What's the source of immutability for pointers produced by `const`?

#502 RalfJung opened 6 months ago
19
Tree Borrows: Two-phase borrows + interior mutability have surprising interactions

#501 RalfJung opened 6 months ago
15
Dead variant removal in `#[repr(C)]` enums

#500 GoldsteinE closed 3 weeks ago
4
Is String allowed to switch to a small-string optimization?

#499 Manishearth opened 6 months ago
10
add note on Stacked Borrows issues and why they are hard to fix

#498 RalfJung closed 6 months ago
0
Provenance: storing to/loading from arbitrary addresses in an interpreter's registers

#497 anp closed 6 months ago
41
std::slice::from_raw_parts alternative that would allow NULL pointer if len == 0 by returning an empty slice?

#496 procedural closed 7 months ago
3
Minimum guarantees regarding `UnsafeCell`

#495 joshlf closed 3 days ago
22
Adopt Minimum Union Validity Rules

#494 chorman0773 opened 7 months ago
24
Promotion introduces UB into otherwise well-defined code

#493 RalfJung opened 7 months ago
17
Does `Box` contain any `UnsafeCell`s?

#492 joshlf opened 7 months ago
9
What happens to the validiy requirements of the return value on a tail call?

#491 RalfJung opened 7 months ago
4
Provenance for zero-sized accesses?

#490 joshlf closed 7 months ago
2
Re-evaluate ABI compatibility rules in light of CFI

#489 RalfJung opened 7 months ago
11
Is it sound to check whether the bytes of an `Option<&T>` are zero?

#488 joshlf opened 8 months ago
25
Semantics of SetDiscriminant with niched variants

#487 RalfJung opened 9 months ago
5
How transitive is repr(transparent)?

#486 Manishearth opened 9 months ago
11
Does the repr(transparent) guarantee work for fields that are empty types?

#485 Manishearth opened 9 months ago
7
How to avoid smuggling of data via TLS and scoped-tls and other means

#484 RalfJung opened 9 months ago
28