test(e2e): reproduce constrained dev shm failure by wan9chi · Pull Request #522 · voidzero-dev/vite-task

wan9chi · 2026-07-09T05:00:03Z

Motivation

Reproduce issue #353 reliably before changing the Linux shared-memory backend.

Changes

Adds vtt small_dev_shm, which mounts a one-page tmpfs at /dev/shm inside private user and mount namespaces.
Adds vtt stat_long_filename and calls std::fs::metadata with a 1 MiB path.
Intercepts glibc statx so the metadata call is recorded through the preload library.
Adds a Linux glibc E2E fixture that records the current SIGBUS failure as exit code 135.

wan9chi · 2026-07-09T05:00:14Z

perf(fspy): use sparse Windows shared memory #524: 2 dependent PRs (#525 , #526 )
fix(fspy): use memfd for Linux shared memory #523
test(e2e): reproduce constrained dev shm failure #522 👈 (View in Graphite)
docs(fspy): document shared-memory facade ownership semantics #521
refactor(fspy): introduce fspy_shm facade #520
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chatgpt-codex-connector · 2026-07-10T10:21:33Z

+ let Some(original) = statx::try_original() else {
+ // Rust's standard library interprets ENOSYS from its statx availability
+ // probe as unsupported and falls back to stat64.
+ // SAFETY: __errno_location returns the calling thread's errno storage on Linux.
+ unsafe { *libc::__errno_location() = libc::ENOSYS };
+ return -1;


Fall back to the raw syscall when libc lacks statx
On Linux systems whose libc does not export statx (for example older glibc targets), this LD_PRELOAD library still exports statx, so code that weak-links or dlsyms statx will call this shim instead of taking its own SYS_statx fallback. Returning ENOSYS here changes those traced tasks from a working kernel statx call into a failure; please invoke the raw SYS_statx path (and record the access) when RTLD_NEXT has no statx rather than exposing a stub.
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Co-authored-by: GPT-5.6 <gpt-5.6@openai.com> Co-authored-by: GPT-5 Codex <codex@openai.com>

Co-authored-by: GPT-5 Codex <codex@openai.com>

wan9chi · 2026-07-10T23:40:32Z

Merge activity

Jul 10, 11:40 PM UTC: @wan9chi merged this pull request with Graphite.

Bumps the `vite-task` git dependency from `cb580c2` to `4003f65`. ## Changes The delta is entirely internal `fspy` (file-access tracking) shared-memory work — no user-facing CLI flags, config fields, or behavior changes, so no docs updates were needed. - **fix(fspy):** use `memfd` for Linux shared memory — automatic file-access tracking on Linux now works in containers and Kubernetes runners with limited `/dev/shm` space ([#523](voidzero-dev/vite-task#523), [#353](voidzero-dev/vite-task#353)) - **perf(fspy):** use sparse Windows shared memory — Windows file-access tracking now uses sparse temporary backing files where supported, avoiding upfront allocation of the full backing file on disk ([#524](voidzero-dev/vite-task#524)) - **refactor(fspy):** own macOS shared-memory mapping ([#526](voidzero-dev/vite-task#526)) - **docs/test(fspy):** document shared-memory facade ownership semantics ([#521](voidzero-dev/vite-task#521)); reproduce constrained dev shm failure ([#522](voidzero-dev/vite-task#522)) The lockfile change reflects this refactor: `fspy` now pulls in `memfd` and drops `shared_memory`. ## Validation - `cargo check --workspace` passes — the new `vite-task` compiles cleanly, confirming no breaking changes on the consuming side (including `vite_cli_snapshots`, which compiles against vite-task's PTY/snapshot test crates). - vite-plus crate tests pass. (One pre-existing, environment-specific stack overflow in `vite_global_cli`'s `unknown_argument_detected_with_pass_as_value_hint` clap-parsing test reproduces identically on `main` and is unrelated to this bump.) - PTY snapshot output is unchanged by the bump; the remaining local snapshot diffs in this sandbox are all environmental (no built `packages/cli/dist`, plus registry TLS/network restrictions), left to CI, which builds the JS CLI and has registry access. ## Changelog Full vite-task CHANGELOG diff: ``https://github.com/voidzero-dev/vite-task/compare/cb580c214bb2314fc1f633a3812782c9b3a1d956...4003f65a3e5e3d957ff81b157e85e6ee41cc59fc#diff-06572a96a58dc510037d5efa622f9bec8519bc1beab13c9f251e97e657a9d4ed`` 🤖 Generated with [Claude Code](https://claude.com/claude-code) --- _Generated by [Claude Code](https://claude.ai/code/session_01YERo1yECf81w37US2Gqnow)_ Co-authored-by: Claude <noreply@anthropic.com>

wan9chi mentioned this pull request Jul 9, 2026
refactor(fspy): introduce fspy_shm facade #520
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wan9chi force-pushed the constrained-dev-shm-e2e branch from 24813bf to ebc6e41Compare July 9, 2026 05:12

wan9chi force-pushed the fspy-shm-lifecycle branch from 7121ef2 to e1d4fa0Compare July 9, 2026 05:12

wan9chi force-pushed the constrained-dev-shm-e2e branch from ebc6e41 to eac0891Compare July 9, 2026 05:22

wan9chi force-pushed the fspy-shm-lifecycle branch from e1d4fa0 to 1e4ee5fCompare July 9, 2026 05:22

wan9chi force-pushed the constrained-dev-shm-e2e branch 2 times, most recently from 82c057f to aaaf01bCompare July 9, 2026 05:35

wan9chi force-pushed the fspy-shm-lifecycle branch from 1e4ee5f to 67ee808Compare July 9, 2026 05:35

wan9chi marked this pull request as ready for review July 9, 2026 05:42

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Comment threadcrates/vite_task_bin/tests/e2e_snapshots/fixtures/constrained_dev_shm/snapshots.toml

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Comment threadcrates/vite_task_bin/src/vtt/stat_file.rs

wan9chi force-pushed the fspy-shm-lifecycle branch from 67ee808 to 669ab52Compare July 9, 2026 07:57

wan9chi force-pushed the constrained-dev-shm-e2e branch from aaaf01b to a64e9b8Compare July 9, 2026 07:57

wan9chi force-pushed the fspy-shm-lifecycle branch 2 times, most recently from 70822fb to 8716c77Compare July 9, 2026 14:16

wan9chi force-pushed the constrained-dev-shm-e2e branch from a64e9b8 to ae72983Compare July 9, 2026 14:16

wan9chi marked this pull request as draft July 10, 2026 01:16

wan9chi force-pushed the fspy-shm-lifecycle branch from 8716c77 to 4e0e749Compare July 10, 2026 06:02

wan9chi force-pushed the constrained-dev-shm-e2e branch from ae72983 to ac080f6Compare July 10, 2026 06:02

wan9chi commented Jul 10, 2026
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wan9chi force-pushed the constrained-dev-shm-e2e branch from d949311 to 23ada60Compare July 10, 2026 07:27

wan9chi marked this pull request as ready for review July 10, 2026 07:37

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Comment threadcrates/vite_task_bin/tests/e2e_snapshots/fixtures/constrained_dev_shm/snapshots.toml

wan9chi force-pushed the constrained-dev-shm-e2e branch from 23ada60 to 7c023afCompare July 10, 2026 08:12

wan9chi commented Jul 10, 2026
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Comment threadcrates/fspy_preload_unix/src/macros/linux.rs Outdated
Comment threadcrates/vite_task_bin/src/vtt/main.rs Outdated
Comment threadcrates/fspy_preload_unix/src/interceptions/stat.rs Outdated

wan9chi force-pushed the constrained-dev-shm-e2e branch from 7c023af to 3d71f50Compare July 10, 2026 09:41

wan9chi marked this pull request as draft July 10, 2026 09:46

wan9chi marked this pull request as ready for review July 10, 2026 10:14

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wan9chi force-pushed the constrained-dev-shm-e2e branch from 3d71f50 to 8dac1e8Compare July 10, 2026 14:59

wan9chi marked this pull request as draft July 10, 2026 15:00

wan9chi force-pushed the constrained-dev-shm-e2e branch from 8dac1e8 to 3433486Compare July 10, 2026 23:32

wan9chi marked this pull request as ready for review July 10, 2026 23:33

wan9chi changed the base branch from fspy-shm-lifecycle to graphite-base/522July 10, 2026 23:36

test(e2e): reproduce constrained dev shm failure
2b5e676
Co-authored-by: GPT-5.6 <gpt-5.6@openai.com> Co-authored-by: GPT-5 Codex <codex@openai.com>

wan9chi force-pushed the graphite-base/522 branch from 2b0d301 to 53345ceCompare July 10, 2026 23:36

wan9chi force-pushed the constrained-dev-shm-e2e branch from 3433486 to 0f5caccCompare July 10, 2026 23:36

graphite-appBot changed the base branch from graphite-base/522 to mainJuly 10, 2026 23:37

chore: remove unrelated formatting changes
cf3315b
Co-authored-by: GPT-5 Codex <codex@openai.com>

wan9chi force-pushed the constrained-dev-shm-e2e branch from 0f5cacc to cf3315bCompare July 10, 2026 23:37

wan9chi merged commit 9e72876 into mainJul 10, 2026
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wan9chi deleted the constrained-dev-shm-e2e branch July 10, 2026 23:40

wan9chi mentioned this pull request Jul 14, 2026
chore: bump vite-task to 4003f65 voidzero-dev/vite-plus#2167
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