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std: use OnceLock for SGX environment variable storage - #158180
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r? @Darksonn rustbot has assigned @Darksonn. Use Why was this reviewer chosen?The reviewer was selected based on:
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Jun 28, 2026
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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std: use `OnceLock` for SGX environment variable storage The SGX environment code predates the existence of `OnceLock` and `AtomicPtr` and consequently violates strict provenance. By using `OnceLock` we can remove all the `unsafe` code (except for the `unsafe` in the function signatures, that's required by other platforms). CC @jethrogb@raoulstrackx@aditijannu
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…uwer Rollup of 6 pull requests Successful merges: - #156737 (Implement `DoubleEndedIterator::next_chunk_back`) - #158147 (std: fix stack buffer overflow in Windows junction_point) - #158180 (std: use `OnceLock` for SGX environment variable storage) - #158427 (Implement `ptr::{read,write}_unaligned` via `repr(packed)`) - #158531 (Change `adjust_ident_and_get_scope` arg to `LocalDefId`) - #158364 (rustc_target/asm: add LoongArch LSX/LASX inline asm register support)
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Rollup of 8 pull requests Successful merges: - #156737 (Implement `DoubleEndedIterator::next_chunk_back`) - #158180 (std: use `OnceLock` for SGX environment variable storage) - #158427 (Implement `ptr::{read,write}_unaligned` via `repr(packed)`) - #158531 (Change `adjust_ident_and_get_scope` arg to `LocalDefId`) - #158574 (Clarify ExitStatusExt documentation) - #158334 (rustdoc: Show use-site paths for unevaluated const array lengths) - #158364 (rustc_target/asm: add LoongArch LSX/LASX inline asm register support) - #158667 (rustc_sanitizers: use twox-hash without default features)
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Jul 2, 2026
Rollup merge of #158180 - joboet:sgx_env_oncelock, r=Darksonn std: use `OnceLock` for SGX environment variable storage The SGX environment code predates the existence of `OnceLock` and `AtomicPtr` and consequently violates strict provenance. By using `OnceLock` we can remove all the `unsafe` code (except for the `unsafe` in the function signatures, that's required by other platforms). CC @jethrogb@raoulstrackx@aditijannu
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Jul 11, 2026
…nthey std: use `OnceLock` for SGX argument storage Just like rust-lang#158180, using a `OnceLock` is much better. Though I guess that in this case a `static mut` would be fine as well... CC @jethrogb@raoulstrackx@aditijannu
JonathanBrouwer added a commit
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…nthey std: use `OnceLock` for SGX argument storage Just like rust-lang#158180, using a `OnceLock` is much better. Though I guess that in this case a `static mut` would be fine as well... CC @jethrogb@raoulstrackx@aditijannu
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Jul 11, 2026
Rollup merge of #158182 - joboet:sgx_args_oncelock, r=clarfonthey std: use `OnceLock` for SGX argument storage Just like #158180, using a `OnceLock` is much better. Though I guess that in this case a `static mut` would be fine as well... CC @jethrogb@raoulstrackx@aditijannu
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The SGX environment code predates the existence of
OnceLockandAtomicPtrand consequently violates strict provenance. By usingOnceLockwe can remove all theunsafecode (except for theunsafein the function signatures, that's required by other platforms).CC @jethrogb@raoulstrackx@aditijannu