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extra sanity check against consts pointing to mutable memory #100897

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merged 1 commit into from
Aug 29, 2022

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This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.

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rustbot commented Aug 23, 2022

Some changes occurred to the CTFE / Miri engine

cc @rust-lang/miri

@rustbot rustbot added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Aug 23, 2022
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r? @lcnr

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Aug 23, 2022
@RalfJung RalfJung force-pushed the const-not-to-mutable branch 2 times, most recently from cee0888 to f352284 Compare August 23, 2022 03:23
);
}
}
_ => {}
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would it make sense to make this match exhaustive?

r=me regardless of whether you do that

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Yeah fair that probably makes sense.

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@bors r=lcnr

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bors commented Aug 23, 2022

📌 Commit cb4cd73 has been approved by lcnr

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 Aug 23, 2022
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 25, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 25, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 26, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 26, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 26, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this pull request Aug 26, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
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@bors rollup

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 28, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 28, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Aug 28, 2022
extra sanity check against consts pointing to mutable memory

This should be both unreachable and redundant (since we already ensure that validation only reads from read-only memory, when validating consts), but I feel like we cannot be paranoid enough here, and also if this ever fails it'll be a nicer error than the "cannot read from mutable memory" error.
bors added a commit to rust-lang-ci/rust that referenced this pull request Aug 29, 2022
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#94890 (Support parsing IP addresses from a byte string)
 - rust-lang#96334 (socket `set_mark` addition.)
 - rust-lang#99027 (Replace `Body::basic_blocks()` with field access)
 - rust-lang#100437 (Improve const mismatch `FulfillmentError`)
 - rust-lang#100843 (Migrate part of rustc_infer to session diagnostic)
 - rust-lang#100897 (extra sanity check against consts pointing to mutable memory)
 - rust-lang#100959 (translations: rename warn_ to warning)
 - rust-lang#101111 (Use the declaration's SourceInfo for FnEntry retags, not the outermost)
 - rust-lang#101116 ([rustdoc] Remove Attrs type alias)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit d814fdd into rust-lang:master Aug 29, 2022
@rustbot rustbot added this to the 1.65.0 milestone Aug 29, 2022
@RalfJung RalfJung deleted the const-not-to-mutable branch August 29, 2022 11:55
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5 participants