Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

ptr_metadata test: avoid ptr-to-int transmutes #95516

Merged
merged 1 commit into from
Apr 1, 2022

Conversation

RalfJung
Copy link
Member

Pointers can have provenance, integers don't, so transmuting pointers to integers creates "non-standard" values and it is unclear how well those can be supported (rust-lang/unsafe-code-guidelines#286).

So for this test let's take the safer option and use a pointer type instead. That also makes Miri happy. :)

@rust-highfive
Copy link
Collaborator

r? @joshtriplett

(rust-highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 31, 2022
@bjorn3 bjorn3 added the A-strict-provenance Area: Strict provenance for raw pointers label Mar 31, 2022
@dtolnay
Copy link
Member

dtolnay commented Mar 31, 2022

@bors r+ rollup

@bors
Copy link
Contributor

bors commented Mar 31, 2022

📌 Commit 907ba11 has been approved by dtolnay

@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 Mar 31, 2022
@dtolnay dtolnay assigned dtolnay and unassigned joshtriplett Mar 31, 2022
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Mar 31, 2022
ptr_metadata test: avoid ptr-to-int transmutes

Pointers can have provenance, integers don't, so transmuting pointers to integers creates "non-standard" values and it is unclear how well those can be supported (rust-lang/unsafe-code-guidelines#286).

So for this test let's take the safer option and use a pointer type instead. That also makes Miri happy. :)
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Apr 1, 2022
ptr_metadata test: avoid ptr-to-int transmutes

Pointers can have provenance, integers don't, so transmuting pointers to integers creates "non-standard" values and it is unclear how well those can be supported (rust-lang/unsafe-code-guidelines#286).

So for this test let's take the safer option and use a pointer type instead. That also makes Miri happy. :)
bors added a commit to rust-lang-ci/rust that referenced this pull request Apr 1, 2022
…askrgr

Rollup of 6 pull requests

Successful merges:

 - rust-lang#95475 (rustdoc: Only show associated consts from inherent impls in sidebar)
 - rust-lang#95516 (ptr_metadata test: avoid ptr-to-int transmutes)
 - rust-lang#95528 (skip slow int_log tests in Miri)
 - rust-lang#95531 (expand: Do not count metavar declarations on RHS of `macro_rules`)
 - rust-lang#95532 (make utf8_char_counts test faster in Miri)
 - rust-lang#95546 (add notes about alignment-altering reallocations to Allocator docs)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 3245e61 into rust-lang:master Apr 1, 2022
@rustbot rustbot added this to the 1.61.0 milestone Apr 1, 2022
@RalfJung RalfJung deleted the ptrs-not-ints branch April 1, 2022 23:48
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
A-strict-provenance Area: Strict provenance for raw pointers S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

7 participants