Test and fix iOS by madsmtm · Pull Request #5158 · rust-lang/libc

madsmtm · 2026-06-09T14:18:06Z

Description

Enable testing on iOS using cargo-apple-runner, a tool I maintain for making it easier to run binaries on the iOS/tvOS/watchOS/visionOS simulator.

This reveals a bunch of places where we exposed symbols that are not actually available on iOS, I've cfg-gated those as #[cfg(target_os = "macos")].

I have marked this as stable-nominated, because I tend to think it fits there even though it's breaking, but we should definitely wait until sysinfo has gotten a release with this fixed, and wait until said release has gotten more popular.

Fixes #1054.

Checklist

Relevant tests in libc-test/semver have been updated
No placeholder or unstable values like *LAST or *MAX are included (see #3131)

Tested locally; especially relevant for platforms that may not be checked in CI

CARGO_TARGET_AARCH64_APPLE_IOS_SIM_RUNNER=cargo-apple-runner cargo test --target aarch64-apple-ios-sim -plibc-test
CARGO_TARGET_AARCH64_APPLE_TVOS_SIM_RUNNER=cargo-apple-runner cargo test --target aarch64-apple-tvos-sim -plibc-test
CARGO_TARGET_AARCH64_APPLE_WATCHOS_SIM_RUNNER=cargo-apple-runner cargo test --target aarch64-apple-watchos-sim -plibc-test
CARGO_TARGET_AARCH64_APPLE_VISIONOS_SIM_RUNNER=cargo-apple-runner cargo test --target aarch64-apple-visionos-sim -plibc-test

madsmtm · 2026-06-09T14:26:19Z

-    pub fn proc_listpgrppids(pgrpid: crate::pid_t, buffer: *mut c_void, buffersize: c_int)
-        -> c_int;
-    pub fn proc_listchildpids(ppid: crate::pid_t, buffer: *mut c_void, buffersize: c_int) -> c_int;
-    pub fn proc_pidinfo(


cfg-gating the sys/proc_info.h stuff will mean the sysinfo crate will no longer compile on iOS/tvOS/watchOS/visionOS, CC @GuillaumeGomez, but it was probably broken before? At least unlikely that actually using these symbols it would get through the App Store.

View changes since the review

As far as I know, people using sysinfo on iOS/App store have access to these functions. Would be nice to have a confirmation though as I can't do it myself.

Do you know who's using sysinfo on iOS? I guess I know that Bevy uses it, so perhaps it's fine, though that might also just be because that code-path is unused (and thus not present in the final binary).

Anyhow, I suspect it's just ProcessInner::open_files that'll need to be gated as macOS-only.

Sometimes people open issues/PRs to fix iOS/App store builds but we'd need to go through PRs/issues to find the users. ^^'

I filed GuillaumeGomez/sysinfo#1679, leaving the thread unresolved for reviewers to see.

tgross35 · 2026-06-23T00:51:56Z

Left some first pass feedback here,
@rustbot author

rustbot · 2026-06-23T00:52:00Z

Reminder, once the PR becomes ready for a review, use @rustbot ready.

These either don't exist in the iOS, tvOS, watchOS and visionOS SDKs, or are marked as unavailable on those platforms. (backport <rust-lang#5158>) (cherry picked from commit 00f55f6) [ needed a slightly unusual resolution due to 790e5c6 ("Remove removed items in OpenBSD") which isn't backported - Trevor ]

(backport <rust-lang#5158>) (cherry picked from commit 7f86676)

(backport <rust-lang#5158>) (cherry picked from commit 0f1943a)

(backport <rust-lang#5158>) (cherry picked from commit f3b2c50)

(backport <rust-lang#5158>) (cherry picked from commit c859fcc)

This makes it clearer where these overrides are required. There should be no functional changes here (since the only three architectures we support for macOS are x86, x86_64 and aarch64). (backport <rust-lang#5158>) (cherry picked from commit 6bf10ad)

This fixes: - The value of `FNM_PATHNAME` and `FNM_NOESCAPE` on iOS, tvOS, watchOS and visionOS. - `memmem` and `task_set_info` not being available on watchOS. - `sigqueue` not being available on iOS, tvOS, watchOS and visionOS. (backport <rust-lang#5158>) (cherry picked from commit e931965)

These either don't exist in the iOS, tvOS, watchOS and visionOS SDKs, or are marked as unavailable on those platforms. (backport <rust-lang#5158>) (cherry picked from commit 00f55f6) [ needed a slightly unusual resolution due to 790e5c6 ("Remove removed items in OpenBSD") which isn't backported - Trevor ]

(backport <rust-lang#5158>) (cherry picked from commit 7f86676)

(backport <rust-lang#5158>) (cherry picked from commit 0f1943a)

(backport <rust-lang#5158>) (cherry picked from commit f3b2c50)

(backport <rust-lang#5158>) (cherry picked from commit c859fcc)

The `SYSPROTO_EVENT` and `SYSPROTO_CONTROL` constants are only available on macOS, see rust-lang/libc#5158.

The `AF_SYS_CONTROL` constant is only available on macOS, see rust-lang/libc#5158.

* ci: add web-sys pin * Import statx_flags from linux_raw_sys explicitly to avoid libc conflicts * Gate sysproto module to macOS The `SYSPROTO_EVENT` and `SYSPROTO_CONTROL` constants are only available on macOS, see rust-lang/libc#5158. * Gate `AF_SYS_CONTROL` to macos The `AF_SYS_CONTROL` constant is only available on macOS, see rust-lang/libc#5158. * Return `NOSYS` from `utimensat` on tvOS and watchOS tvOS and watchOS do not provide `fork`, so the `utimensat` fallback cannot be implemented on these platforms. Return `NOSYS` instead.

…rk compile again libc 0.2.190 stopped exposing macOS-only API on iOS (rust-lang/libc#5158). netdev 0.46.3, underneath iroh by way of netwatch, still uses one of those items, `in6_ifreq`, on every Apple target, so with 0.2.190 in the lock the aarch64-apple-ios and aarch64-apple-ios-sim slices fail to compile and the Apple build and Swift smoke job is red. netdev 0.46.2 has the same code, so holding netdev back does not help; libc is the release to hold. Cargo.toml now bounds libc to =0.2.189 on Apple targets, which bounds the lock everywhere, so a later `cargo update` or Update dependencies run keeps it. Dependabot ignores libc >= 0.2.190 for the same reason. Both come out once netdev ships a release that builds for iOS against a newer libc.

… its range allows (#51) * chore(deps): the lock resolves every dependency to the newest version its range allows allocator-api2 0.2.21 -> (none) async-trait 0.1.92 -> (none) bitflags 2.13.1 -> 2.13.2 camino 1.2.5 -> 1.2.6 cc 1.4.5 -> 1.6.0 cfg-if 1.0.4 -> 1.0.5 clap 4.6.6 -> 4.6.7 clap_builder 4.6.6 -> 4.6.7 clap_derive 4.6.4 -> 4.6.7 clap_lex 1.1.0 -> 1.1.1 core-foundation 0.9.4 -> (none) critical-section 1.2.0 -> (none) crossbeam-channel 0.5.17 -> (none) crossbeam-epoch 0.9.21 -> (none) crossbeam-utils 0.8.23 -> (none) ctutils 0.4.2 -> 0.4.3 either 1.18.0 -> (none) find-msvc-tools 0.1.12 -> 0.1.14 fs-err 3.3.1 -> 3.3.2 generator 0.8.9 -> 0.8.10 h2 0.4.19 -> 0.4.20 hickory-net 0.26.2 -> (none) hickory-proto 0.26.2 -> (none) hickory-resolver 0.26.2 -> (none) hybrid-array 0.4.14 -> 0.4.15 hyper 1.11.1 -> 1.12.0 hyper-rustls 0.27.9 -> 0.27.10 hyper-util 0.1.20 -> 0.1.21 iroh 1.1.0 -> 1.3.0 iroh-base 1.1.0 -> 1.3.0 iroh-dns 1.1.0 -> 1.3.0 iroh-metrics 1.0.1 -> 1.0.2 iroh-relay 1.1.0 -> 1.3.0 js-sys 0.3.105 -> 0.3.106 lazy_static 1.5.0 -> 1.5.1 libc 0.2.189 -> 0.2.190 lock_api 0.4.14 -> (none) lru 0.18.4 -> 0.18.5 lru-slab 0.1.2 -> 0.1.3 mio 1.2.3 -> 1.2.4 modelpipe 0.8.3 -> 0.8.5 moka 0.12.16 -> (none) n0-dns-resolver (none) -> 0.1.0 netdev 0.46.2 -> 0.46.3 noq 1.2.0 -> 1.3.0 noq-proto 1.2.0 -> 1.3.0 noq-udp 1.2.0 -> 1.3.0 objc2 0.6.4 -> 0.6.5 parking_lot 0.12.5 -> (none) parking_lot_core 0.9.12 -> (none) powerfmt 0.2.0 -> 0.2.1 prefix-trie 0.8.4 -> (none) rand 0.10.2 -> 0.10.3 redox_syscall 0.5.18 -> (none) reqwest 0.13.4 -> 0.13.5 resolv-conf 0.7.6 -> (none) rustix 1.1.4 -> 1.1.5 rustls 0.23.44 -> 0.23.45 rustls-platform-verifier 0.7.0 -> 0.7.1 rustls-platform-verifier-android 0.1.1 -> 0.2.0 scopeguard 1.2.0 -> (none) serde_spanned 1.1.1 -> 1.1.2 siphasher 1.0.3 -> 1.0.4 smallvec 1.16.0 -> 1.16.2 spki 0.8.0 -> 0.8.1 syn 3.0.5 -> 3.0.6 synstructure 0.13.2 -> 0.14.0 system-configuration 0.7.0 -> 0.8.0 tagptr 0.2.0 -> (none) textwrap 0.16.2 -> 0.16.4 thiserror 2.0.20 -> 2.0.21 thiserror-impl 2.0.20 -> 2.0.21 tinyvec 1.13.2 -> 1.13.3 tinyvec_macros 0.1.1 -> (none) tokio-rustls 0.26.5 -> 0.26.6 toml 1.1.5+spec-1.1.0 -> 1.1.7+spec-1.1.0 toml_datetime 1.1.1+spec-1.1.0 -> 1.1.2+spec-1.1.0 toml_edit 0.25.13+spec-1.1.0 -> 0.25.16+spec-1.1.0 toml_parser 1.1.3+spec-1.1.0 -> 1.1.4+spec-1.1.0 toml_writer 1.1.2+spec-1.1.0 -> 1.1.3+spec-1.1.0 unicode-ident 1.0.24 -> 1.0.26 unicode-width (none) -> 0.2.2 uuid 1.26.0 -> (none) want 0.3.1 -> 0.3.2 wasm-bindgen 0.2.128 -> 0.2.129 wasm-bindgen-futures 0.4.78 -> 0.4.79 wasm-bindgen-macro 0.2.128 -> 0.2.129 wasm-bindgen-macro-support 0.2.128 -> 0.2.129 wasm-bindgen-shared 0.2.128 -> 0.2.129 web-sys 0.3.105 -> 0.3.106 yoke-derive 0.8.2 -> 0.8.4 zerocopy 0.8.56 -> 0.8.62 zerocopy-derive 0.8.56 -> 0.8.62 zerofrom-derive 0.1.7 -> 0.1.8 zeroize 1.9.0 -> 1.9.1 * fix(deps): libc stays at 0.2.189, so both iOS slices of the XCFramework compile again libc 0.2.190 stopped exposing macOS-only API on iOS (rust-lang/libc#5158). netdev 0.46.3, underneath iroh by way of netwatch, still uses one of those items, `in6_ifreq`, on every Apple target, so with 0.2.190 in the lock the aarch64-apple-ios and aarch64-apple-ios-sim slices fail to compile and the Apple build and Swift smoke job is red. netdev 0.46.2 has the same code, so holding netdev back does not help; libc is the release to hold. Cargo.toml now bounds libc to =0.2.189 on Apple targets, which bounds the lock everywhere, so a later `cargo update` or Update dependencies run keeps it. Dependabot ignores libc >= 0.2.190 for the same reason. Both come out once netdev ships a release that builds for iOS against a newer libc. --------- Co-authored-by: mmogr <172192206+mmogr@users.noreply.github.com>

madsmtm added A-CI Area: CI-related items O-macos C-testsuite C-cleanup stable-nominated This PR should be considered for cherry-pick to libc's stable release branch github_actions Pull requests that update GitHub Actions code labels Jun 9, 2026

madsmtm force-pushed the cargo-apple-runner branch from 2d10ab7 to f222bd7 Compare June 9, 2026 14:22

madsmtm commented Jun 9, 2026

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madsmtm changed the title ~~Test on iOS~~ Test and fix iOS Jun 9, 2026

madsmtm force-pushed the cargo-apple-runner branch from f222bd7 to 5d33927 Compare June 9, 2026 14:28

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madsmtm force-pushed the cargo-apple-runner branch from 999db32 to 0598978 Compare June 18, 2026 16:09

madsmtm mentioned this pull request Jun 18, 2026

Remove usage of proc_pidinfo on iOS GuillaumeGomez/sysinfo#1679

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madsmtm force-pushed the cargo-apple-runner branch from 0598978 to 4bfdbd8 Compare June 18, 2026 17:01

madsmtm marked this pull request as ready for review June 18, 2026 17:17

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tgross35 reviewed Jun 19, 2026

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This was referenced Aug 19, 2026

redox: clock_settime, pause #5363

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emscripten: Add epoll support #5427

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madsmtm deleted the cargo-apple-runner branch August 19, 2026 21:29

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Make system as unavailable on iOS/tvOS/watchOS/visionOS

304d2fc

(backport <rust-lang#5158>) (cherry picked from commit 7f86676)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Mark exec* and fork as unavailable on tvOS and watchOS

4a2b79b

(backport <rust-lang#5158>) (cherry picked from commit 0f1943a)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Fix iOS, tvOS, watchOS and visionOS tests

dc34cb0

(backport <rust-lang#5158>) (cherry picked from commit f3b2c50)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Use cargo-apple-runner for testing iOS and tvOS

88542f1

(backport <rust-lang#5158>) (cherry picked from commit c859fcc)

tgross35 mentioned this pull request Sep 4, 2026

[0.2] Backports #5462

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tgross35 added stable-applied This PR has been cherry-picked to libc's stable release branch and removed stable-nominated This PR should be considered for cherry-pick to libc's stable release branch labels Sep 4, 2026

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Make system as unavailable on iOS/tvOS/watchOS/visionOS

d50524d

(backport <rust-lang#5158>) (cherry picked from commit 7f86676)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Mark exec* and fork as unavailable on tvOS and watchOS

980ce14

(backport <rust-lang#5158>) (cherry picked from commit 0f1943a)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Fix iOS, tvOS, watchOS and visionOS tests

da93ad3

(backport <rust-lang#5158>) (cherry picked from commit f3b2c50)

tgross35 pushed a commit to tgross35/rust-libc that referenced this pull request Sep 4, 2026

Use cargo-apple-runner for testing iOS and tvOS

ed6e4c2

(backport <rust-lang#5158>) (cherry picked from commit c859fcc)

xtqqczze mentioned this pull request Sep 6, 2026

Fix compile errors for next libc version bytecodealliance/rustix#1676

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xtqqczze added a commit to xtqqczze/bytecodealliance-rustix that referenced this pull request Sep 6, 2026

Gate sysproto module to macOS

f7ea9d5

The `SYSPROTO_EVENT` and `SYSPROTO_CONTROL` constants are only available on macOS, see rust-lang/libc#5158.

xtqqczze added a commit to xtqqczze/bytecodealliance-rustix that referenced this pull request Sep 6, 2026

Gate AF_SYS_CONTROL to macos

1046178

The `AF_SYS_CONTROL` constant is only available on macOS, see rust-lang/libc#5158.

dev-juju mentioned this pull request Oct 4, 2026

0.2.190: _dyld_image_count and the other dyld image functions are now macOS-only, breaking backtrace on iOS #5601

Open

madsmtm mentioned this pull request Oct 6, 2026

apple: Make public mach API available on all Apple targets again #5612

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mmogr mentioned this pull request Oct 9, 2026

chore(deps): the lock resolves every dependency to the newest version its range allows mmogr/modelpipe-ffi#51

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This was referenced Oct 9, 2026

Lockfile maintenance knu/avail#46

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Lockfile maintenance knu/qpath#60

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Lockfile maintenance knu/tfil#44

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