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interpret: clobber return place when calling function #105207

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merged 1 commit into from
Dec 6, 2022

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@RalfJung RalfJung commented Dec 3, 2022

Makes sure the callee cannot observe the previous contents of the return place, and the caller cannot read any of the old return place contents even if the function unwinds.

I don't think we can test for this though, that would require some strange hand-written MIR.

r? @oli-obk

@rustbot rustbot added 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 Dec 3, 2022
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rustbot commented Dec 3, 2022

Some changes occurred to the CTFE / Miri engine

cc @rust-lang/miri

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oli-obk commented Dec 5, 2022

@bors r+ rollup

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bors commented Dec 5, 2022

📌 Commit 51ac2af has been approved by oli-obk

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 Dec 5, 2022
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Dec 5, 2022
… r=oli-obk

interpret: clobber return place when calling function

Makes sure the callee cannot observe the previous contents of the return place, and the caller cannot read any of the old return place contents even if the function unwinds.

I don't think we can test for this though, that would require some strange hand-written MIR.

r? `@oli-obk`
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Dec 5, 2022
… r=oli-obk

interpret: clobber return place when calling function

Makes sure the callee cannot observe the previous contents of the return place, and the caller cannot read any of the old return place contents even if the function unwinds.

I don't think we can test for this though, that would require some strange hand-written MIR.

r? ``@oli-obk``
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Dec 5, 2022
… r=oli-obk

interpret: clobber return place when calling function

Makes sure the callee cannot observe the previous contents of the return place, and the caller cannot read any of the old return place contents even if the function unwinds.

I don't think we can test for this though, that would require some strange hand-written MIR.

r? ```@oli-obk```
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Dec 5, 2022
… r=oli-obk

interpret: clobber return place when calling function

Makes sure the callee cannot observe the previous contents of the return place, and the caller cannot read any of the old return place contents even if the function unwinds.

I don't think we can test for this though, that would require some strange hand-written MIR.

r? ````@oli-obk````
bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 6, 2022
Rollup of 10 pull requests

Successful merges:

 - rust-lang#104967 (Fix UI issues with Rustdoc scrape-examples feature.)
 - rust-lang#105207 (interpret: clobber return place when calling function)
 - rust-lang#105246 (Fix --pass in compiletest)
 - rust-lang#105256 (Add small comment explaining what `method-margins.goml` test is about)
 - rust-lang#105289 (Fix dupe word typos)
 - rust-lang#105309 (rustdoc: remove no-op mobile CSS `.sidebar { margin: 0; padding: 0 }`)
 - rust-lang#105313 (Update books)
 - rust-lang#105315 (Normalize inherent associated types after substitution)
 - rust-lang#105324 (Point at GAT `where` clause when an obligation is unsatisfied)
 - rust-lang#105338 (Tweak "the following other types implement trait")

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit aa08310 into rust-lang:master Dec 6, 2022
@rustbot rustbot added this to the 1.67.0 milestone Dec 6, 2022
@RalfJung RalfJung deleted the interpret-clobber-return branch December 8, 2022 21:36
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4 participants