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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Wait, how does placing ZST statics work again?

#546 workingjubilee opened 1 week ago
0
What about: distributed slices (linkme)

#545 CAD97 opened 1 week ago
3
deliberate UB: OOB access

#544 RalfJung closed 2 weeks ago
0
Where does one instance of the Rust Abstract Machine end and another one start?

#543 VorpalBlade opened 3 weeks ago
19
Will destructors create `&mut` references only when `Drop::drop()` is called?

#542 theemathas opened 3 weeks ago
2
Are long-lived references to thread_local variables allowed?

#541 theemathas opened 3 weeks ago
4
Is pattern evaluation order guaranteed?

#540 zachs18 opened 3 weeks ago
0
Stabilize having the concept of "validity invariant" and "safety invariant"? Under which name?

#539 RalfJung opened 1 month ago
2
update the docs for layout guarantees of option-like enums

#538 RalfJung closed 3 days ago
5
How can I tell the Rust compiler `&mut [u8]` has changed after a DMA operation

#537 schultetwin1 opened 1 month ago
41
Confusion of retagging in the blog stacked-borrows-implementation

#536 hanayashiki closed 1 month ago
1
What are the special magic rules around `malloc`?

#535 RalfJung opened 1 month ago
9
What memory is the Global allocator allowed to access

#534 jwong101 closed 1 month ago
8
Minimum guarantees for union construction and typed copies?

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

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

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

#530 joshlf opened 2 months ago
1
Do ZST `Box`es violate provenance monotonicity?

#529 joshlf closed 2 months ago
4
Can FFI code use `memory_order_consume`

#528 chorman0773 opened 3 months ago
9
Can uninitialized memory come from the outside world?

#527 ChayimFriedman2 opened 3 months ago
4
What are the requirements for unloading a library (`dlclose`)?

#526 VorpalBlade opened 3 months ago
8
What are the soundness requirements for `dlopen`?

#525 RalfJung opened 3 months ago
40
Is it UB to have a mutable reference that could be misused, or simply to misuse it?

#524 clarfonthey closed 3 months ago
4
How do aliasing model protectors interact with tail calls?

#523 RalfJung opened 3 months ago
5
What do we say about the equality of pointers in constants, vtables, and function pointers?

#522 RalfJung opened 3 months ago
19
repr(C) does not always match the current target's C toolchain (when that target is windows-msvc)

#521 RalfJung opened 3 months ago
7
What are the operational semantics of unsized locals?

#520 RalfJung opened 3 months ago
4
If a Pin is changed to point to a different location, what happens?

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

#518 RalfJung opened 3 months ago
19
Packing pointers into double-word width atomics

#517 eggyal opened 4 months ago
48
What are the validity requirements of wide pointers/references with `dyn Trait` tail?

#516 RalfJung opened 4 months ago
1
Should we have a way to give functions a stable address?

#515 RalfJung opened 4 months ago
5
Is it UB to change a non-`mut` `extern static`?

#514 ChayimFriedman2 closed 4 months ago
3
Validity of a `char` value that is a surrogate

#513 celinval closed 4 months ago
16
Should we have a language concept of erroneous behavior?

#512 CAD97 opened 6 months ago
7
Should closures implicitly be wrapped in `MaybeDangling`?

#511 RalfJung opened 6 months ago
4
Decide on validity for metadata of wide pointer/reference with slice tail

#510 RalfJung closed 6 months ago
23
Are &mut references that point to read only memory but are never written to undefined behavior

#509 gmorenz closed 6 months ago
3
Is `usize::MAX` an allocatable address?

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

#507 joboet opened 7 months ago
2
Who is responsible for preventing reentrancy issues through the allocator?

#506 RalfJung opened 7 months ago
10
Better documentation needed: reentrancy through the panic hook

#505 RalfJung opened 7 months ago
3
When are `static` symbols guaranteed to show up in the final binary?

#504 RalfJung opened 7 months ago
11
What are the guarantees over ZST pointers

#503 celinval closed 7 months ago
11
What's the source of immutability for pointers produced by `const`?

#502 RalfJung opened 7 months ago
19
Tree Borrows: Two-phase borrows + interior mutability have surprising interactions

#501 RalfJung opened 8 months ago
15
Dead variant removal in `#[repr(C)]` enums

#500 GoldsteinE closed 2 months ago
4
Is String allowed to switch to a small-string optimization?

#499 Manishearth opened 8 months ago
10
add note on Stacked Borrows issues and why they are hard to fix

#498 RalfJung closed 8 months ago
0
Provenance: storing to/loading from arbitrary addresses in an interpreter's registers

#497 anp closed 8 months ago
41